From mirageos-devel-bounces@lists.xenproject.org Sat Jan 02 12:07:30 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 02 Jan 2016 12:07:30 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFKxs-0004Wq-JS; Sat, 02 Jan 2016 12:07:20 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFKxq-0004Wl-RK for mirageos-devel@lists.xenproject.org; Sat, 02 Jan 2016 12:07:18 +0000 Received: from [85.158.139.211] by server-1.bemta-5.messagelabs.com id F9/4C-32615-67DB7865; Sat, 02 Jan 2016 12:07:18 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-11.tower-206.messagelabs.com!1451736436!13578447!1 X-Originating-IP: [209.85.213.47] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 59557 invoked from network); 2 Jan 2016 12:07:17 -0000 Received: from mail-vk0-f47.google.com (HELO mail-vk0-f47.google.com) (209.85.213.47) by server-11.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 2 Jan 2016 12:07:17 -0000 Received: by mail-vk0-f47.google.com with SMTP id a188so232630627vkc.0 for ; Sat, 02 Jan 2016 04:07:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=w+UtGX/X39k7moAkZA+UR4Al690qB2X+w7KT6741WCk=; b=V0k2lItVyUur6Pj+ckyRF4MJqfdqMxrMcCB+DFiR/HjnC2bOt/36R+4L4i+t+W7Lir nYYHRZw8cKiC8KhuGAwNxdtJ8c2r+1KtWpbJdVJ6WKuYIMBL1Gu4Sg1lvsGIeoxE4moD 6C4wo8Ny5yArgJb98PuCAhoO554FB0HB/DlEXPz5PXbw9Mz0DxPWIdVQoMHXKyK9DFq1 8b54DB+hM+tlvYbrats6AtUPANLZz9eNnuPArv7wSlHaMQyAEyLwmAmYyRJ2z8Nkqa/n 2GwI6TjXehIaRdoHpxblDNm8WX0F/09161Vv2tSnbD5ceOSWZ/+r7yKszC+PVTAzu37D sLFA== MIME-Version: 1.0 X-Received: by 10.31.129.11 with SMTP id c11mr48848802vkd.52.1451736436185; Sat, 02 Jan 2016 04:07:16 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sat, 2 Jan 2016 04:07:16 -0800 (PST) Date: Sat, 2 Jan 2016 12:07:16 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org I have a Mirage firewall running now under Qubes: http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ There are some things that need fixing though: - I'm using an old version of mirage-nat, as the current version requires Irmin. I think there were some plans to factor this out - what's the status of this? I think only the new version has code to expire entries, right? - You need to generate an unused port for NAT. I copied simple-nat's system of picking a random number and retrying but (as the TODO there says) this will eventually run out of ports and hang. I assume we should add some kind of free-port tracking to tcpip, right? pcb.ml's getid has a better strategy of searching forward from the last port it used, but it will also hang if it runs out (as noted by another TODO). The UDP code doesn't seem to track free ports at all (fails with a TODO if you ask it to pick a free one). - I'm not sure what the protocol is for disconnecting netback clients. Currently I just set the interface state to Closed, but the XenStore directory in "backend/vif" remains - is this documented somewhere? - Mirage allows you to access memory after unmapping it. This isn't safe (may page-fault or give access to someone else's data). I've added checks in mirage-net-xen to make sure we don't try to access a ring after unmapping it [1], but I think this should be fixed at the Bigarray level [2]. - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. - mirage-nat mutates packets in-place. It might be cleaner if it made a copy instead (it could copy just the header and return [new_header; old_payload]). Since mirage-net copies the data into the shared ring anyway, there should be very little overhead to doing it this way. - mirage-nat works on whole Ethernet frames. I believe NAT only applies to the IP layer - it would make my code cleaner if I could strip off the Ethernet header when the frame arrives and just work with the IP layer. It might simplify the mirage-nat API too. - I don't validate checksums on incoming packets, and always recalculate after NAT before sending. We should probably track this properly and support checksum offload. This will require an interface change to NETWORK. - I made some changes to mirage-nat (exposed checksum code in tcpip and used that directly, and removed the unused "direction" argument as it was confusing me). Might be useful to merge these upstream. [1] https://github.com/mirage/mirage-net-xen/compare/master...talex5:disconnect?expand=1 [2] https://github.com/ocaml/ocaml/commit/af6f20ef0afc4f8ab9d3cc89042038b55930e09d -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sat Jan 02 12:07:30 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 02 Jan 2016 12:07:30 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFKxs-0004Wq-JS; Sat, 02 Jan 2016 12:07:20 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFKxq-0004Wl-RK for mirageos-devel@lists.xenproject.org; Sat, 02 Jan 2016 12:07:18 +0000 Received: from [85.158.139.211] by server-1.bemta-5.messagelabs.com id F9/4C-32615-67DB7865; Sat, 02 Jan 2016 12:07:18 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-11.tower-206.messagelabs.com!1451736436!13578447!1 X-Originating-IP: [209.85.213.47] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 59557 invoked from network); 2 Jan 2016 12:07:17 -0000 Received: from mail-vk0-f47.google.com (HELO mail-vk0-f47.google.com) (209.85.213.47) by server-11.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 2 Jan 2016 12:07:17 -0000 Received: by mail-vk0-f47.google.com with SMTP id a188so232630627vkc.0 for ; Sat, 02 Jan 2016 04:07:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=w+UtGX/X39k7moAkZA+UR4Al690qB2X+w7KT6741WCk=; b=V0k2lItVyUur6Pj+ckyRF4MJqfdqMxrMcCB+DFiR/HjnC2bOt/36R+4L4i+t+W7Lir nYYHRZw8cKiC8KhuGAwNxdtJ8c2r+1KtWpbJdVJ6WKuYIMBL1Gu4Sg1lvsGIeoxE4moD 6C4wo8Ny5yArgJb98PuCAhoO554FB0HB/DlEXPz5PXbw9Mz0DxPWIdVQoMHXKyK9DFq1 8b54DB+hM+tlvYbrats6AtUPANLZz9eNnuPArv7wSlHaMQyAEyLwmAmYyRJ2z8Nkqa/n 2GwI6TjXehIaRdoHpxblDNm8WX0F/09161Vv2tSnbD5ceOSWZ/+r7yKszC+PVTAzu37D sLFA== MIME-Version: 1.0 X-Received: by 10.31.129.11 with SMTP id c11mr48848802vkd.52.1451736436185; Sat, 02 Jan 2016 04:07:16 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sat, 2 Jan 2016 04:07:16 -0800 (PST) Date: Sat, 2 Jan 2016 12:07:16 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org I have a Mirage firewall running now under Qubes: http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ There are some things that need fixing though: - I'm using an old version of mirage-nat, as the current version requires Irmin. I think there were some plans to factor this out - what's the status of this? I think only the new version has code to expire entries, right? - You need to generate an unused port for NAT. I copied simple-nat's system of picking a random number and retrying but (as the TODO there says) this will eventually run out of ports and hang. I assume we should add some kind of free-port tracking to tcpip, right? pcb.ml's getid has a better strategy of searching forward from the last port it used, but it will also hang if it runs out (as noted by another TODO). The UDP code doesn't seem to track free ports at all (fails with a TODO if you ask it to pick a free one). - I'm not sure what the protocol is for disconnecting netback clients. Currently I just set the interface state to Closed, but the XenStore directory in "backend/vif" remains - is this documented somewhere? - Mirage allows you to access memory after unmapping it. This isn't safe (may page-fault or give access to someone else's data). I've added checks in mirage-net-xen to make sure we don't try to access a ring after unmapping it [1], but I think this should be fixed at the Bigarray level [2]. - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. - mirage-nat mutates packets in-place. It might be cleaner if it made a copy instead (it could copy just the header and return [new_header; old_payload]). Since mirage-net copies the data into the shared ring anyway, there should be very little overhead to doing it this way. - mirage-nat works on whole Ethernet frames. I believe NAT only applies to the IP layer - it would make my code cleaner if I could strip off the Ethernet header when the frame arrives and just work with the IP layer. It might simplify the mirage-nat API too. - I don't validate checksums on incoming packets, and always recalculate after NAT before sending. We should probably track this properly and support checksum offload. This will require an interface change to NETWORK. - I made some changes to mirage-nat (exposed checksum code in tcpip and used that directly, and removed the unused "direction" argument as it was confusing me). Might be useful to merge these upstream. [1] https://github.com/mirage/mirage-net-xen/compare/master...talex5:disconnect?expand=1 [2] https://github.com/ocaml/ocaml/commit/af6f20ef0afc4f8ab9d3cc89042038b55930e09d -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sat Jan 02 12:14:58 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 02 Jan 2016 12:14:58 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFL5F-0004fN-Mx; Sat, 02 Jan 2016 12:14:57 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFL5E-0004fI-Ih for mirageos-devel@lists.xenproject.org; Sat, 02 Jan 2016 12:14:56 +0000 Received: from [193.109.254.147] by server-2.bemta-14.messagelabs.com id 76/AB-12889-F3FB7865; Sat, 02 Jan 2016 12:14:55 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-4.tower-27.messagelabs.com!1451736892!13327091!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.2 required=7.0 tests=RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 20717 invoked from network); 2 Jan 2016 12:14:52 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-4.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 2 Jan 2016 12:14:52 -0000 Received: by bark.recoil.org (OpenSMTPD) with ESMTPSA id 96b4158c TLS version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO; Sat, 2 Jan 2016 12:14:51 +0000 (GMT) Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) From: Anil Madhavapeddy In-Reply-To: Date: Sat, 2 Jan 2016 12:14:49 +0000 Message-Id: <5D5DE037-E183-4A3F-B2EA-B0488CE95FB3@recoil.org> References: To: Thomas Leonard X-Mailer: Apple Mail (2.3096.5) Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 2 Jan 2016, at 12:07, Thomas Leonard wrote: > > I have a Mirage firewall running now under Qubes: > > http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ > Awesome! > There are some things that need fixing though: > > - I'm using an old version of mirage-nat, as the current version > requires Irmin. I think there were some plans to factor this out - > what's the status of this? I think only the new version has code to > expire entries, right? > > - You need to generate an unused port for NAT. I copied simple-nat's > system of picking a random number and retrying but (as the TODO there > says) this will eventually run out of ports and hang. I assume we > should add some kind of free-port tracking to tcpip, right? pcb.ml's > getid has a better strategy of searching forward from the last port it > used, but it will also hang if it runs out (as noted by another TODO). > The UDP code doesn't seem to track free ports at all (fails with a > TODO if you ask it to pick a free one). Yes, we need a standalone free-port picking datastructure for a few things: - udp source port selection - tcp/ip source port selection - ipv4 id selection also needs some form of non-repeating selector but we don't currently fragment outbound at the moment. For randomising this, a linear congruential generator is what the OpenBSD stack uses. > > - I'm not sure what the protocol is for disconnecting netback clients. > Currently I just set the interface state to Closed, but the XenStore > directory in "backend/vif" remains - is this documented somewhere? Good question, not sure. > - Mirage allows you to access memory after unmapping it. This isn't > safe (may page-fault or give access to someone else's data). I've > added checks in mirage-net-xen to make sure we don't try to access a > ring after unmapping it [1], but I think this should be fixed at the > Bigarray level [2]. > Did that Bigarray patch get committed into OCaml 4.03dev? I dont have a checkout handy here and it's hard to map a commit to the associated PRs in the web UI. > - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. Presumably this also means that UDP NAT doesnt work? > - mirage-nat mutates packets in-place. It might be cleaner if it made > a copy instead (it could copy just the header and return [new_header; > old_payload]). Since mirage-net copies the data into the shared ring > anyway, there should be very little overhead to doing it this way > > - mirage-nat works on whole Ethernet frames. I believe NAT only > applies to the IP layer - it would make my code cleaner if I could > strip off the Ethernet header when the frame arrives and just work > with the IP layer. It might simplify the mirage-nat API too. > > - I don't validate checksums on incoming packets, and always > recalculate after NAT before sending. We should probably track this > properly and support checksum offload. This will require an interface > change to NETWORK. Yeah, there's a general need for feature flags to be added to the NETWORK device interfaces... Looking forward to trying this out on my Cubieboard at home soon! Anil _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sat Jan 02 12:14:58 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 02 Jan 2016 12:14:58 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFL5F-0004fN-Mx; Sat, 02 Jan 2016 12:14:57 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFL5E-0004fI-Ih for mirageos-devel@lists.xenproject.org; Sat, 02 Jan 2016 12:14:56 +0000 Received: from [193.109.254.147] by server-2.bemta-14.messagelabs.com id 76/AB-12889-F3FB7865; Sat, 02 Jan 2016 12:14:55 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-4.tower-27.messagelabs.com!1451736892!13327091!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.2 required=7.0 tests=RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 20717 invoked from network); 2 Jan 2016 12:14:52 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-4.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 2 Jan 2016 12:14:52 -0000 Received: by bark.recoil.org (OpenSMTPD) with ESMTPSA id 96b4158c TLS version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO; Sat, 2 Jan 2016 12:14:51 +0000 (GMT) Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) From: Anil Madhavapeddy In-Reply-To: Date: Sat, 2 Jan 2016 12:14:49 +0000 Message-Id: <5D5DE037-E183-4A3F-B2EA-B0488CE95FB3@recoil.org> References: To: Thomas Leonard X-Mailer: Apple Mail (2.3096.5) Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 2 Jan 2016, at 12:07, Thomas Leonard wrote: > > I have a Mirage firewall running now under Qubes: > > http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ > Awesome! > There are some things that need fixing though: > > - I'm using an old version of mirage-nat, as the current version > requires Irmin. I think there were some plans to factor this out - > what's the status of this? I think only the new version has code to > expire entries, right? > > - You need to generate an unused port for NAT. I copied simple-nat's > system of picking a random number and retrying but (as the TODO there > says) this will eventually run out of ports and hang. I assume we > should add some kind of free-port tracking to tcpip, right? pcb.ml's > getid has a better strategy of searching forward from the last port it > used, but it will also hang if it runs out (as noted by another TODO). > The UDP code doesn't seem to track free ports at all (fails with a > TODO if you ask it to pick a free one). Yes, we need a standalone free-port picking datastructure for a few things: - udp source port selection - tcp/ip source port selection - ipv4 id selection also needs some form of non-repeating selector but we don't currently fragment outbound at the moment. For randomising this, a linear congruential generator is what the OpenBSD stack uses. > > - I'm not sure what the protocol is for disconnecting netback clients. > Currently I just set the interface state to Closed, but the XenStore > directory in "backend/vif" remains - is this documented somewhere? Good question, not sure. > - Mirage allows you to access memory after unmapping it. This isn't > safe (may page-fault or give access to someone else's data). I've > added checks in mirage-net-xen to make sure we don't try to access a > ring after unmapping it [1], but I think this should be fixed at the > Bigarray level [2]. > Did that Bigarray patch get committed into OCaml 4.03dev? I dont have a checkout handy here and it's hard to map a commit to the associated PRs in the web UI. > - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. Presumably this also means that UDP NAT doesnt work? > - mirage-nat mutates packets in-place. It might be cleaner if it made > a copy instead (it could copy just the header and return [new_header; > old_payload]). Since mirage-net copies the data into the shared ring > anyway, there should be very little overhead to doing it this way > > - mirage-nat works on whole Ethernet frames. I believe NAT only > applies to the IP layer - it would make my code cleaner if I could > strip off the Ethernet header when the frame arrives and just work > with the IP layer. It might simplify the mirage-nat API too. > > - I don't validate checksums on incoming packets, and always > recalculate after NAT before sending. We should probably track this > properly and support checksum offload. This will require an interface > change to NETWORK. Yeah, there's a general need for feature flags to be added to the NETWORK device interfaces... Looking forward to trying this out on my Cubieboard at home soon! Anil _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sat Jan 02 14:38:51 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 02 Jan 2016 14:38:51 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFNKL-0006nH-Ud; Sat, 02 Jan 2016 14:38:41 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFNKL-0006nC-3i for mirageos-devel@lists.xenproject.org; Sat, 02 Jan 2016 14:38:41 +0000 Received: from [85.158.139.211] by server-15.bemta-5.messagelabs.com id F4/AC-16870-0F0E7865; Sat, 02 Jan 2016 14:38:40 +0000 X-Env-Sender: mindy@somerandomidiot.com X-Msg-Ref: server-5.tower-206.messagelabs.com!1451745486!13591508!1 X-Originating-IP: [217.70.183.198] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 50564 invoked from network); 2 Jan 2016 14:38:06 -0000 Received: from relay6-d.mail.gandi.net (HELO relay6-d.mail.gandi.net) (217.70.183.198) by server-5.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 2 Jan 2016 14:38:06 -0000 Received: from mfilter29-d.gandi.net (mfilter29-d.gandi.net [217.70.178.160]) by relay6-d.mail.gandi.net (Postfix) with ESMTP id 8F80CFB882 for ; Sat, 2 Jan 2016 15:38:06 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at mfilter29-d.gandi.net Received: from relay6-d.mail.gandi.net ([IPv6:::ffff:217.70.183.198]) by mfilter29-d.gandi.net (mfilter29-d.gandi.net [::ffff:10.0.15.180]) (amavisd-new, port 10024) with ESMTP id Vq69YQL75c_h for ; Sat, 2 Jan 2016 15:38:05 +0100 (CET) X-Originating-IP: 81.134.29.229 Received: from [192.168.1.108] (host81-134-29-229.in-addr.btopenworld.com [81.134.29.229]) (Authenticated sender: guybrush@somerandomidiot.com) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id 0FB93FB881 for ; Sat, 2 Jan 2016 15:38:04 +0100 (CET) To: mirageos-devel@lists.xenproject.org References: <5D5DE037-E183-4A3F-B2EA-B0488CE95FB3@recoil.org> From: Mindy Message-ID: <5687E017.2020807@somerandomidiot.com> Date: Sat, 2 Jan 2016 14:35:03 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <5D5DE037-E183-4A3F-B2EA-B0488CE95FB3@recoil.org> Subject: Re: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: > On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >> I have a Mirage firewall running now under Qubes: >> >> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ >> > Awesome! Seconded! This is very cool; I look forward to using it myself. :) > >> There are some things that need fixing though: >> >> - I'm using an old version of mirage-nat, as the current version >> requires Irmin. I think there were some plans to factor this out - >> what's the status of this? In progress. I've been distracted by other things but hope to have it finished soon. Having users for this library is a huge motivator, so in combination with the points you raise below mirage-nat is probably headed for a 1.0 re >> I think only the new version has code to >> expire entries, right? Yes, but with some very stupid and broken logic; rather than doing anything intelligent with state tracking there's a simple wall-clock-based timeout with a much longer horizon for TCP connections than UDP ones. It really ought to do something smarter before release. >> >> - You need to generate an unused port for NAT. I copied simple-nat's >> system of picking a random number and retrying but (as the TODO there >> says) this will eventually run out of ports and hang. I assume we >> should add some kind of free-port tracking to tcpip, right? pcb.ml's >> getid has a better strategy of searching forward from the last port it >> used, but it will also hang if it runs out (as noted by another TODO). >> The UDP code doesn't seem to track free ports at all (fails with a >> TODO if you ask it to pick a free one). > Yes, we need a standalone free-port picking datastructure for a few things: > - udp source port selection > - tcp/ip source port selection > - ipv4 id selection also needs some form of non-repeating selector > but we don't currently fragment outbound at the moment. > > For randomising this, a linear congruential generator is what the > OpenBSD stack uses. Agreed with all above. > >> - I'm not sure what the protocol is for disconnecting netback clients. >> Currently I just set the interface state to Closed, but the XenStore >> directory in "backend/vif" remains - is this documented somewhere? > Good question, not sure. > >> - Mirage allows you to access memory after unmapping it. This isn't >> safe (may page-fault or give access to someone else's data). I've >> added checks in mirage-net-xen to make sure we don't try to access a >> ring after unmapping it [1], but I think this should be fixed at the >> Bigarray level [2]. >> > Did that Bigarray patch get committed into OCaml 4.03dev? I dont > have a checkout handy here and it's hard to map a commit to the > associated PRs in the web UI. > >> - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. > Presumably this also means that UDP NAT doesnt work? > Since most firewalls implement default-drop for incoming packets which don't match a rule, most stacks are quite used to not receiving ICMP errors for attempted UDP connections that aren't to open ports. Or possibly I misunderstand? At any rate, mirage-nat creates rules for UDP connections and rewrites headers just as it does for TCP. >> - mirage-nat mutates packets in-place. It might be cleaner if it made >> a copy instead (it could copy just the header and return [new_header; >> old_payload]). Since mirage-net copies the data into the shared ring >> anyway, there should be very little overhead to doing it this way I had assumed there would be high overhead to a copying approach, but what you say merits trying it out. I agree that a copy would be cleaner. >> - mirage-nat works on whole Ethernet frames. I believe NAT only >> applies to the IP layer - it would make my code cleaner if I could >> strip off the Ethernet header when the frame arrives and just work >> with the IP layer. It might simplify the mirage-nat API too. I'll think about this a bit. >> >> - I don't validate checksums on incoming packets, and always >> recalculate after NAT before sending. We should probably track this >> properly and support checksum offload. This will require an interface >> change to NETWORK. > Yeah, there's a general need for feature flags to be added to the > NETWORK device interfaces... > > Looking forward to trying this out on my Cubieboard at home soon! > > Anil > > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sat Jan 02 14:38:51 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 02 Jan 2016 14:38:51 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFNKL-0006nH-Ud; Sat, 02 Jan 2016 14:38:41 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFNKL-0006nC-3i for mirageos-devel@lists.xenproject.org; Sat, 02 Jan 2016 14:38:41 +0000 Received: from [85.158.139.211] by server-15.bemta-5.messagelabs.com id F4/AC-16870-0F0E7865; Sat, 02 Jan 2016 14:38:40 +0000 X-Env-Sender: mindy@somerandomidiot.com X-Msg-Ref: server-5.tower-206.messagelabs.com!1451745486!13591508!1 X-Originating-IP: [217.70.183.198] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 50564 invoked from network); 2 Jan 2016 14:38:06 -0000 Received: from relay6-d.mail.gandi.net (HELO relay6-d.mail.gandi.net) (217.70.183.198) by server-5.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 2 Jan 2016 14:38:06 -0000 Received: from mfilter29-d.gandi.net (mfilter29-d.gandi.net [217.70.178.160]) by relay6-d.mail.gandi.net (Postfix) with ESMTP id 8F80CFB882 for ; Sat, 2 Jan 2016 15:38:06 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at mfilter29-d.gandi.net Received: from relay6-d.mail.gandi.net ([IPv6:::ffff:217.70.183.198]) by mfilter29-d.gandi.net (mfilter29-d.gandi.net [::ffff:10.0.15.180]) (amavisd-new, port 10024) with ESMTP id Vq69YQL75c_h for ; Sat, 2 Jan 2016 15:38:05 +0100 (CET) X-Originating-IP: 81.134.29.229 Received: from [192.168.1.108] (host81-134-29-229.in-addr.btopenworld.com [81.134.29.229]) (Authenticated sender: guybrush@somerandomidiot.com) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id 0FB93FB881 for ; Sat, 2 Jan 2016 15:38:04 +0100 (CET) To: mirageos-devel@lists.xenproject.org References: <5D5DE037-E183-4A3F-B2EA-B0488CE95FB3@recoil.org> From: Mindy Message-ID: <5687E017.2020807@somerandomidiot.com> Date: Sat, 2 Jan 2016 14:35:03 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <5D5DE037-E183-4A3F-B2EA-B0488CE95FB3@recoil.org> Subject: Re: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: > On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >> I have a Mirage firewall running now under Qubes: >> >> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ >> > Awesome! Seconded! This is very cool; I look forward to using it myself. :) > >> There are some things that need fixing though: >> >> - I'm using an old version of mirage-nat, as the current version >> requires Irmin. I think there were some plans to factor this out - >> what's the status of this? In progress. I've been distracted by other things but hope to have it finished soon. Having users for this library is a huge motivator, so in combination with the points you raise below mirage-nat is probably headed for a 1.0 re >> I think only the new version has code to >> expire entries, right? Yes, but with some very stupid and broken logic; rather than doing anything intelligent with state tracking there's a simple wall-clock-based timeout with a much longer horizon for TCP connections than UDP ones. It really ought to do something smarter before release. >> >> - You need to generate an unused port for NAT. I copied simple-nat's >> system of picking a random number and retrying but (as the TODO there >> says) this will eventually run out of ports and hang. I assume we >> should add some kind of free-port tracking to tcpip, right? pcb.ml's >> getid has a better strategy of searching forward from the last port it >> used, but it will also hang if it runs out (as noted by another TODO). >> The UDP code doesn't seem to track free ports at all (fails with a >> TODO if you ask it to pick a free one). > Yes, we need a standalone free-port picking datastructure for a few things: > - udp source port selection > - tcp/ip source port selection > - ipv4 id selection also needs some form of non-repeating selector > but we don't currently fragment outbound at the moment. > > For randomising this, a linear congruential generator is what the > OpenBSD stack uses. Agreed with all above. > >> - I'm not sure what the protocol is for disconnecting netback clients. >> Currently I just set the interface state to Closed, but the XenStore >> directory in "backend/vif" remains - is this documented somewhere? > Good question, not sure. > >> - Mirage allows you to access memory after unmapping it. This isn't >> safe (may page-fault or give access to someone else's data). I've >> added checks in mirage-net-xen to make sure we don't try to access a >> ring after unmapping it [1], but I think this should be fixed at the >> Bigarray level [2]. >> > Did that Bigarray patch get committed into OCaml 4.03dev? I dont > have a checkout handy here and it's hard to map a commit to the > associated PRs in the web UI. > >> - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. > Presumably this also means that UDP NAT doesnt work? > Since most firewalls implement default-drop for incoming packets which don't match a rule, most stacks are quite used to not receiving ICMP errors for attempted UDP connections that aren't to open ports. Or possibly I misunderstand? At any rate, mirage-nat creates rules for UDP connections and rewrites headers just as it does for TCP. >> - mirage-nat mutates packets in-place. It might be cleaner if it made >> a copy instead (it could copy just the header and return [new_header; >> old_payload]). Since mirage-net copies the data into the shared ring >> anyway, there should be very little overhead to doing it this way I had assumed there would be high overhead to a copying approach, but what you say merits trying it out. I agree that a copy would be cleaner. >> - mirage-nat works on whole Ethernet frames. I believe NAT only >> applies to the IP layer - it would make my code cleaner if I could >> strip off the Ethernet header when the frame arrives and just work >> with the IP layer. It might simplify the mirage-nat API too. I'll think about this a bit. >> >> - I don't validate checksums on incoming packets, and always >> recalculate after NAT before sending. We should probably track this >> properly and support checksum offload. This will require an interface >> change to NETWORK. > Yeah, there's a general need for feature flags to be added to the > NETWORK device interfaces... > > Looking forward to trying this out on my Cubieboard at home soon! > > Anil > > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sat Jan 02 14:58:48 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 02 Jan 2016 14:58:48 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFNdl-0007FM-8h; Sat, 02 Jan 2016 14:58:45 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFNdi-0007FH-Sf for mirageos-devel@lists.xenproject.org; Sat, 02 Jan 2016 14:58:43 +0000 Received: from [85.158.139.211] by server-2.bemta-5.messagelabs.com id C4/53-31450-2A5E7865; Sat, 02 Jan 2016 14:58:42 +0000 X-Env-Sender: scott.dj@gmail.com X-Msg-Ref: server-9.tower-206.messagelabs.com!1451746717!13593786!1 X-Originating-IP: [74.125.82.42] X-SpamReason: No, hits=0.9 required=7.0 tests=BODY_RANDOM_LONG, HTML_30_40,HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 1712 invoked from network); 2 Jan 2016 14:58:37 -0000 Received: from mail-wm0-f42.google.com (HELO mail-wm0-f42.google.com) (74.125.82.42) by server-9.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 2 Jan 2016 14:58:37 -0000 Received: by mail-wm0-f42.google.com with SMTP id l65so122138029wmf.1 for ; Sat, 02 Jan 2016 06:58:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=Tho9fPP8YIcz+aJVLIqSmyvpptBR2zdB/xB+5uuvqbE=; b=EF4vRy+eqc41hI/+M22wIpDWyUUMmsECaMtEncaJjiOY4A7aVjd8on0t/LupfqZpOa VPqN+TsfhD0o30IbbGwtqMvDS5yfRoXmaAVcpcKBLDCDBJ9Y+385ZyL38wFsLluVl12u UAnzTi1iMpH9Y5FhHw8a8kpjbkyFdjmbP6NFfxCy0+Qgzw2IxeoRDdcoPhQZ1Hd+3eyo jQjUWI8t+2oED8GRalcuoMug/PEeFXqZlGQYnCM0j0AhuHi+8JsOQbbHR5IGrKEfLDt2 ymXv6O/vqujKn6OvYzmU46lndgAEOVW+d8OSHa+bV66RTYH40vYS0NiW0EQw/v3vZqzH +vjg== MIME-Version: 1.0 X-Received: by 10.194.48.106 with SMTP id k10mr34731457wjn.86.1451746717560; Sat, 02 Jan 2016 06:58:37 -0800 (PST) Received: by 10.28.137.2 with HTTP; Sat, 2 Jan 2016 06:58:37 -0800 (PST) In-Reply-To: References: Date: Sat, 2 Jan 2016 14:58:37 +0000 Message-ID: From: David Scott To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1534751786866448463==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============1534751786866448463== Content-Type: multipart/alternative; boundary=047d7b86c8aa67791605285b1fdb --047d7b86c8aa67791605285b1fdb Content-Type: text/plain; charset=UTF-8 On Sat, Jan 2, 2016 at 12:07 PM, Thomas Leonard wrote: > I have a Mirage firewall running now under Qubes: > > > http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ > > Excellent stuff! > There are some things that need fixing though: > > - I'm using an old version of mirage-nat, as the current version > requires Irmin. I think there were some plans to factor this out - > what's the status of this? I think only the new version has code to > expire entries, right? > > - You need to generate an unused port for NAT. I copied simple-nat's > system of picking a random number and retrying but (as the TODO there > says) this will eventually run out of ports and hang. I assume we > should add some kind of free-port tracking to tcpip, right? pcb.ml's > getid has a better strategy of searching forward from the last port it > used, but it will also hang if it runs out (as noted by another TODO). > The UDP code doesn't seem to track free ports at all (fails with a > TODO if you ask it to pick a free one). > > - I'm not sure what the protocol is for disconnecting netback clients. > Currently I just set the interface state to Closed, but the XenStore > directory in "backend/vif" remains - is this documented somewhere? > I used to believe that the toolstack's job was to manage (create + destroy) the backend/frontend directories in xenstore, and it was up to the backend and frontend implementations to keep their important state somewhere safe (i.e. not xenstore or in shared memory, where another party could modify it and invalidate some invariant). For example if someone runs `xenstore-rm ` I imagined the backend would still remember its configuration and would be able to clean up afterwards, and not leak. However I think the policy changed in September, probably to accommodate not-very-defensively-written backends: https://github.com/mirage/xen/commit/546678c6a60f64fb186640460dfa69a837c8fba5 It looks like the driver domain now has to delete its own directory, when it has finished using it. BTW it just occurred to me that the Windows PV drivers perform an interesting hotunplug-hotplug dance when they are first connected (apparently this is caused by a strangeness of the Windows driver model). To make this work we'll need to support the `online` backend key -- basically the frontend can initiate an unplug at any time, which should cause the backend to close but not delete itself (because `online=1`). The frontend can then plug itself back in. In the case of a toolstack-initiated hot unplug, the toolstack will set `online=0` first, so the backend will know it's safe to self-delete. Cheers, Dave > > - Mirage allows you to access memory after unmapping it. This isn't > safe (may page-fault or give access to someone else's data). I've > added checks in mirage-net-xen to make sure we don't try to access a > ring after unmapping it [1], but I think this should be fixed at the > Bigarray level [2]. > > - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. > > - mirage-nat mutates packets in-place. It might be cleaner if it made > a copy instead (it could copy just the header and return [new_header; > old_payload]). Since mirage-net copies the data into the shared ring > anyway, there should be very little overhead to doing it this way. > > - mirage-nat works on whole Ethernet frames. I believe NAT only > applies to the IP layer - it would make my code cleaner if I could > strip off the Ethernet header when the frame arrives and just work > with the IP layer. It might simplify the mirage-nat API too. > > - I don't validate checksums on incoming packets, and always > recalculate after NAT before sending. We should probably track this > properly and support checksum offload. This will require an interface > change to NETWORK. > > - I made some changes to mirage-nat (exposed checksum code in tcpip > and used that directly, and removed the unused "direction" argument as > it was confusing me). Might be useful to merge these upstream. > > > [1] > https://github.com/mirage/mirage-net-xen/compare/master...talex5:disconnect?expand=1 > [2] > https://github.com/ocaml/ocaml/commit/af6f20ef0afc4f8ab9d3cc89042038b55930e09d > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --047d7b86c8aa67791605285b1fdb Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Sat, Jan 2, 2016 at 12:07 PM, Thomas Leonard <<= a href=3D"mailto:talex5@gmail.com" target=3D"_blank">talex5@gmail.com&g= t; wrote:
I have a Mirage firewall running now u= nder Qubes:

=C2=A0 http://roscidus.com= /blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/


Excellent stuff!
=C2=A0
There are some things that need fixing though:

- I'm using an old version of mirage-nat, as the current version
requires Irmin. I think there were some plans to factor this out -
what's the status of this? I think only the new version has code to
expire entries, right?

- You need to generate an unused port for NAT. I copied simple-nat's system of picking a random number and retrying but (as the TODO there
says) this will eventually run out of ports and hang. I assume we
should add some kind of free-port tracking to tcpip, right? pcb.ml's
getid has a better strategy of searching forward from the last port it
used, but it will also hang if it runs out (as noted by another TODO).
The UDP code doesn't seem to track free ports at all (fails with a
TODO if you ask it to pick a free one).

- I'm not sure what the protocol is for disconnecting netback clients.<= br> Currently I just set the interface state to Closed, but the XenStore
directory in "backend/vif" remains - is this documented somewhere= ?

I used to believe that the toolstack&= #39;s job was to manage (create + destroy) the backend/frontend directories= in xenstore, and it was up to the backend and frontend implementations to = keep their important state somewhere safe (i.e. not xenstore or in shared m= emory, where another party could modify it and invalidate some invariant). = For example if someone runs `xenstore-rm <backend>` I imagined the ba= ckend would still remember its configuration and would be able to clean up = afterwards, and not leak.

However I think the poli= cy changed in September, probably to accommodate not-very-defensively-writt= en backends:

<= br>
It looks like the driver domain now has to delete its own dir= ectory, when it has finished using it.

BTW it just= occurred to me that the Windows PV drivers perform an interesting hotunplu= g-hotplug dance when they are first connected (apparently this is caused by= a strangeness of the Windows driver model). To make this work we'll ne= ed to support the `online` backend key -- basically the frontend can initia= te an unplug at any time, which should cause the backend to close but not d= elete itself (because `online=3D1`). The frontend can then plug itself back= in. In the case of a toolstack-initiated hot unplug, the toolstack will se= t `online=3D0` first, so the backend will know it's safe to self-delete= .

Cheers,
Dave

= =C2=A0

- Mirage allows you to access memory after unmapping it. This isn't
safe (may page-fault or give access to someone else's data). I've added checks in mirage-net-xen to make sure we don't try to access a ring after unmapping it [1], but I think this should be fixed at the
Bigarray level [2].

- mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work = yet.

- mirage-nat mutates packets in-place. It might be cleaner if it made
a copy instead (it could copy just the header and return [new_header;
old_payload]). Since mirage-net copies the data into the shared ring
anyway, there should be very little overhead to doing it this way.

- mirage-nat works on whole Ethernet frames. I believe NAT only
applies to the IP layer - it would make my code cleaner if I could
strip off the Ethernet header when the frame arrives and just work
with the IP layer. It might simplify the mirage-nat API too.

- I don't validate checksums on incoming packets, and always
recalculate after NAT before sending. We should probably track this
properly and support checksum offload. This will require an interface
change to NETWORK.

- I made some changes to mirage-nat (exposed checksum code in tcpip
and used that directly, and removed the unused "direction" argume= nt as
it was confusing me). Might be useful to merge these upstream.


[1] https://gi= thub.com/mirage/mirage-net-xen/compare/master...talex5:disconnect?expand=3D= 1
[2] https://github.com= /ocaml/ocaml/commit/af6f20ef0afc4f8ab9d3cc89042038b55930e09d

--
Dr Thomas Leonard=C2=A0 =C2=A0 =C2=A0 =C2=A0 http://roscidus.com/blog/<= br> GPG: DA98 25AE CAD0 8975 7CDA=C2=A0 BD8E 0713 3F96 CA74 D8BA

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
http://lists.xenproject.org/cgi-b= in/mailman/listinfo/mirageos-devel



--
Dave Scott
--047d7b86c8aa67791605285b1fdb-- --===============1534751786866448463== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============1534751786866448463==-- From mirageos-devel-bounces@lists.xenproject.org Sat Jan 02 14:58:48 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 02 Jan 2016 14:58:48 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFNdl-0007FM-8h; Sat, 02 Jan 2016 14:58:45 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFNdi-0007FH-Sf for mirageos-devel@lists.xenproject.org; Sat, 02 Jan 2016 14:58:43 +0000 Received: from [85.158.139.211] by server-2.bemta-5.messagelabs.com id C4/53-31450-2A5E7865; Sat, 02 Jan 2016 14:58:42 +0000 X-Env-Sender: scott.dj@gmail.com X-Msg-Ref: server-9.tower-206.messagelabs.com!1451746717!13593786!1 X-Originating-IP: [74.125.82.42] X-SpamReason: No, hits=0.9 required=7.0 tests=BODY_RANDOM_LONG, HTML_30_40,HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 1712 invoked from network); 2 Jan 2016 14:58:37 -0000 Received: from mail-wm0-f42.google.com (HELO mail-wm0-f42.google.com) (74.125.82.42) by server-9.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 2 Jan 2016 14:58:37 -0000 Received: by mail-wm0-f42.google.com with SMTP id l65so122138029wmf.1 for ; Sat, 02 Jan 2016 06:58:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=Tho9fPP8YIcz+aJVLIqSmyvpptBR2zdB/xB+5uuvqbE=; b=EF4vRy+eqc41hI/+M22wIpDWyUUMmsECaMtEncaJjiOY4A7aVjd8on0t/LupfqZpOa VPqN+TsfhD0o30IbbGwtqMvDS5yfRoXmaAVcpcKBLDCDBJ9Y+385ZyL38wFsLluVl12u UAnzTi1iMpH9Y5FhHw8a8kpjbkyFdjmbP6NFfxCy0+Qgzw2IxeoRDdcoPhQZ1Hd+3eyo jQjUWI8t+2oED8GRalcuoMug/PEeFXqZlGQYnCM0j0AhuHi+8JsOQbbHR5IGrKEfLDt2 ymXv6O/vqujKn6OvYzmU46lndgAEOVW+d8OSHa+bV66RTYH40vYS0NiW0EQw/v3vZqzH +vjg== MIME-Version: 1.0 X-Received: by 10.194.48.106 with SMTP id k10mr34731457wjn.86.1451746717560; Sat, 02 Jan 2016 06:58:37 -0800 (PST) Received: by 10.28.137.2 with HTTP; Sat, 2 Jan 2016 06:58:37 -0800 (PST) In-Reply-To: References: Date: Sat, 2 Jan 2016 14:58:37 +0000 Message-ID: From: David Scott To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1534751786866448463==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============1534751786866448463== Content-Type: multipart/alternative; boundary=047d7b86c8aa67791605285b1fdb --047d7b86c8aa67791605285b1fdb Content-Type: text/plain; charset=UTF-8 On Sat, Jan 2, 2016 at 12:07 PM, Thomas Leonard wrote: > I have a Mirage firewall running now under Qubes: > > > http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ > > Excellent stuff! > There are some things that need fixing though: > > - I'm using an old version of mirage-nat, as the current version > requires Irmin. I think there were some plans to factor this out - > what's the status of this? I think only the new version has code to > expire entries, right? > > - You need to generate an unused port for NAT. I copied simple-nat's > system of picking a random number and retrying but (as the TODO there > says) this will eventually run out of ports and hang. I assume we > should add some kind of free-port tracking to tcpip, right? pcb.ml's > getid has a better strategy of searching forward from the last port it > used, but it will also hang if it runs out (as noted by another TODO). > The UDP code doesn't seem to track free ports at all (fails with a > TODO if you ask it to pick a free one). > > - I'm not sure what the protocol is for disconnecting netback clients. > Currently I just set the interface state to Closed, but the XenStore > directory in "backend/vif" remains - is this documented somewhere? > I used to believe that the toolstack's job was to manage (create + destroy) the backend/frontend directories in xenstore, and it was up to the backend and frontend implementations to keep their important state somewhere safe (i.e. not xenstore or in shared memory, where another party could modify it and invalidate some invariant). For example if someone runs `xenstore-rm ` I imagined the backend would still remember its configuration and would be able to clean up afterwards, and not leak. However I think the policy changed in September, probably to accommodate not-very-defensively-written backends: https://github.com/mirage/xen/commit/546678c6a60f64fb186640460dfa69a837c8fba5 It looks like the driver domain now has to delete its own directory, when it has finished using it. BTW it just occurred to me that the Windows PV drivers perform an interesting hotunplug-hotplug dance when they are first connected (apparently this is caused by a strangeness of the Windows driver model). To make this work we'll need to support the `online` backend key -- basically the frontend can initiate an unplug at any time, which should cause the backend to close but not delete itself (because `online=1`). The frontend can then plug itself back in. In the case of a toolstack-initiated hot unplug, the toolstack will set `online=0` first, so the backend will know it's safe to self-delete. Cheers, Dave > > - Mirage allows you to access memory after unmapping it. This isn't > safe (may page-fault or give access to someone else's data). I've > added checks in mirage-net-xen to make sure we don't try to access a > ring after unmapping it [1], but I think this should be fixed at the > Bigarray level [2]. > > - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. > > - mirage-nat mutates packets in-place. It might be cleaner if it made > a copy instead (it could copy just the header and return [new_header; > old_payload]). Since mirage-net copies the data into the shared ring > anyway, there should be very little overhead to doing it this way. > > - mirage-nat works on whole Ethernet frames. I believe NAT only > applies to the IP layer - it would make my code cleaner if I could > strip off the Ethernet header when the frame arrives and just work > with the IP layer. It might simplify the mirage-nat API too. > > - I don't validate checksums on incoming packets, and always > recalculate after NAT before sending. We should probably track this > properly and support checksum offload. This will require an interface > change to NETWORK. > > - I made some changes to mirage-nat (exposed checksum code in tcpip > and used that directly, and removed the unused "direction" argument as > it was confusing me). Might be useful to merge these upstream. > > > [1] > https://github.com/mirage/mirage-net-xen/compare/master...talex5:disconnect?expand=1 > [2] > https://github.com/ocaml/ocaml/commit/af6f20ef0afc4f8ab9d3cc89042038b55930e09d > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --047d7b86c8aa67791605285b1fdb Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Sat, Jan 2, 2016 at 12:07 PM, Thomas Leonard <<= a href=3D"mailto:talex5@gmail.com" target=3D"_blank">talex5@gmail.com&g= t; wrote:
I have a Mirage firewall running now u= nder Qubes:

=C2=A0 http://roscidus.com= /blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/


Excellent stuff!
=C2=A0
There are some things that need fixing though:

- I'm using an old version of mirage-nat, as the current version
requires Irmin. I think there were some plans to factor this out -
what's the status of this? I think only the new version has code to
expire entries, right?

- You need to generate an unused port for NAT. I copied simple-nat's system of picking a random number and retrying but (as the TODO there
says) this will eventually run out of ports and hang. I assume we
should add some kind of free-port tracking to tcpip, right? pcb.ml's
getid has a better strategy of searching forward from the last port it
used, but it will also hang if it runs out (as noted by another TODO).
The UDP code doesn't seem to track free ports at all (fails with a
TODO if you ask it to pick a free one).

- I'm not sure what the protocol is for disconnecting netback clients.<= br> Currently I just set the interface state to Closed, but the XenStore
directory in "backend/vif" remains - is this documented somewhere= ?

I used to believe that the toolstack&= #39;s job was to manage (create + destroy) the backend/frontend directories= in xenstore, and it was up to the backend and frontend implementations to = keep their important state somewhere safe (i.e. not xenstore or in shared m= emory, where another party could modify it and invalidate some invariant). = For example if someone runs `xenstore-rm <backend>` I imagined the ba= ckend would still remember its configuration and would be able to clean up = afterwards, and not leak.

However I think the poli= cy changed in September, probably to accommodate not-very-defensively-writt= en backends:

<= br>
It looks like the driver domain now has to delete its own dir= ectory, when it has finished using it.

BTW it just= occurred to me that the Windows PV drivers perform an interesting hotunplu= g-hotplug dance when they are first connected (apparently this is caused by= a strangeness of the Windows driver model). To make this work we'll ne= ed to support the `online` backend key -- basically the frontend can initia= te an unplug at any time, which should cause the backend to close but not d= elete itself (because `online=3D1`). The frontend can then plug itself back= in. In the case of a toolstack-initiated hot unplug, the toolstack will se= t `online=3D0` first, so the backend will know it's safe to self-delete= .

Cheers,
Dave

= =C2=A0

- Mirage allows you to access memory after unmapping it. This isn't
safe (may page-fault or give access to someone else's data). I've added checks in mirage-net-xen to make sure we don't try to access a ring after unmapping it [1], but I think this should be fixed at the
Bigarray level [2].

- mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work = yet.

- mirage-nat mutates packets in-place. It might be cleaner if it made
a copy instead (it could copy just the header and return [new_header;
old_payload]). Since mirage-net copies the data into the shared ring
anyway, there should be very little overhead to doing it this way.

- mirage-nat works on whole Ethernet frames. I believe NAT only
applies to the IP layer - it would make my code cleaner if I could
strip off the Ethernet header when the frame arrives and just work
with the IP layer. It might simplify the mirage-nat API too.

- I don't validate checksums on incoming packets, and always
recalculate after NAT before sending. We should probably track this
properly and support checksum offload. This will require an interface
change to NETWORK.

- I made some changes to mirage-nat (exposed checksum code in tcpip
and used that directly, and removed the unused "direction" argume= nt as
it was confusing me). Might be useful to merge these upstream.


[1] https://gi= thub.com/mirage/mirage-net-xen/compare/master...talex5:disconnect?expand=3D= 1
[2] https://github.com= /ocaml/ocaml/commit/af6f20ef0afc4f8ab9d3cc89042038b55930e09d

--
Dr Thomas Leonard=C2=A0 =C2=A0 =C2=A0 =C2=A0 http://roscidus.com/blog/<= br> GPG: DA98 25AE CAD0 8975 7CDA=C2=A0 BD8E 0713 3F96 CA74 D8BA

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
http://lists.xenproject.org/cgi-b= in/mailman/listinfo/mirageos-devel



--
Dave Scott
--047d7b86c8aa67791605285b1fdb-- --===============1534751786866448463== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============1534751786866448463==-- From mirageos-devel-bounces@lists.xenproject.org Sun Jan 03 10:39:14 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 03 Jan 2016 10:39:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFg3y-0000Bx-ER; Sun, 03 Jan 2016 10:39:02 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFg3w-0000BW-2P for mirageos-devel@lists.xenproject.org; Sun, 03 Jan 2016 10:39:00 +0000 Received: from [85.158.137.68] by server-15.bemta-3.messagelabs.com id 77/DA-12946-24AF8865; Sun, 03 Jan 2016 10:38:58 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-14.tower-31.messagelabs.com!1451817537!13634190!1 X-Originating-IP: [209.85.213.43] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 60804 invoked from network); 3 Jan 2016 10:38:57 -0000 Received: from mail-vk0-f43.google.com (HELO mail-vk0-f43.google.com) (209.85.213.43) by server-14.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 3 Jan 2016 10:38:57 -0000 Received: by mail-vk0-f43.google.com with SMTP id k1so110734492vkb.2 for ; Sun, 03 Jan 2016 02:38:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=YQ9ZAeK2dSdJllikwVXelshEN+CRERDN20w4GYX+O08=; b=q0ohDvx+ufwLFIcW2gFHtll7VttmecQk6B3wvpCxIVSztVOj1PLdH8zNuHGBePArXh f79s9vEFqKk3seSnNtgXU8Du9Fdzoek/+yyxTpomiHAwaaM2nwIJ+ckC5BT+M05MA9eU jBMqHdAlCwPNVCmbd5GpEm/VhLZVMZLnBNpcNusvA/AZKTSh46s0o5QzF/9wVnxUE70U JIZf3DXuOqd6ezMnl2pMcqjlw5XLnErDEfiVJVSDwmwetQmjKsNfAr8Un94O2BLbyjVE tYi2oLpcAWFFzBcYYVhl1c4/x97ZjPI/qFvOdEKkqypzXmUbWbXoQ6VVh+nuhpAiyXs+ pSRg== MIME-Version: 1.0 X-Received: by 10.31.168.205 with SMTP id r196mr57669534vke.120.1451817536596; Sun, 03 Jan 2016 02:38:56 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sun, 3 Jan 2016 02:38:56 -0800 (PST) In-Reply-To: <5687E017.2020807@somerandomidiot.com> References: <5D5DE037-E183-4A3F-B2EA-B0488CE95FB3@recoil.org> <5687E017.2020807@somerandomidiot.com> Date: Sun, 3 Jan 2016 10:38:56 +0000 Message-ID: From: Thomas Leonard To: Mindy Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 2 January 2016 at 14:35, Mindy wrote: > On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >> >> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>> >>> I have a Mirage firewall running now under Qubes: >>> >>> >>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ >>> >> Awesome! > > > Seconded! This is very cool; I look forward to using it myself. :) > >> >>> There are some things that need fixing though: >>> >>> - I'm using an old version of mirage-nat, as the current version >>> requires Irmin. I think there were some plans to factor this out - >>> what's the status of this? > > In progress. I've been distracted by other things but hope to have it > finished soon. Having users for this library is a huge motivator, so in > combination with the points you raise below mirage-nat is probably headed > for a 1.0 re Great :-) Having this library saved me a huge amount of work! >>> I think only the new version has code to >>> expire entries, right? > > > Yes, but with some very stupid and broken logic; rather than doing anything > intelligent with state tracking there's a simple wall-clock-based timeout > with a much longer horizon for TCP connections than UDP ones. It really > ought to do something smarter before release. As a quick workaround, mirage-firewall now drops the entire NAT table if it runs out of memory or takes too long to find a free port. >>> - You need to generate an unused port for NAT. I copied simple-nat's >>> system of picking a random number and retrying but (as the TODO there >>> says) this will eventually run out of ports and hang. I assume we >>> should add some kind of free-port tracking to tcpip, right? pcb.ml's >>> getid has a better strategy of searching forward from the last port it >>> used, but it will also hang if it runs out (as noted by another TODO). >>> The UDP code doesn't seem to track free ports at all (fails with a >>> TODO if you ask it to pick a free one). >> >> Yes, we need a standalone free-port picking datastructure for a few >> things: >> - udp source port selection >> - tcp/ip source port selection >> - ipv4 id selection also needs some form of non-repeating selector >> but we don't currently fragment outbound at the moment. >> >> For randomising this, a linear congruential generator is what the >> OpenBSD stack uses. > > > Agreed with all above. > >> >>> - I'm not sure what the protocol is for disconnecting netback clients. >>> Currently I just set the interface state to Closed, but the XenStore >>> directory in "backend/vif" remains - is this documented somewhere? >> >> Good question, not sure. >> >>> - Mirage allows you to access memory after unmapping it. This isn't >>> safe (may page-fault or give access to someone else's data). I've >>> added checks in mirage-net-xen to make sure we don't try to access a >>> ring after unmapping it [1], but I think this should be fixed at the >>> Bigarray level [2]. >>> >> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >> have a checkout handy here and it's hard to map a commit to the >> associated PRs in the web UI. I haven't submitted a PR yet. Need to update it to master and test. >>> - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. >> >> Presumably this also means that UDP NAT doesnt work? UDP NAT seems to be working fine. mirage-firewall uses it to redirect DNS requests. > Since most firewalls implement default-drop for incoming packets which don't > match a rule, most stacks are quite used to not receiving ICMP errors for > attempted UDP connections that aren't to open ports. Or possibly I > misunderstand? At any rate, mirage-nat creates rules for UDP connections > and rewrites headers just as it does for TCP. > >>> - mirage-nat mutates packets in-place. It might be cleaner if it made >>> a copy instead (it could copy just the header and return [new_header; >>> old_payload]). Since mirage-net copies the data into the shared ring >>> anyway, there should be very little overhead to doing it this way > > I had assumed there would be high overhead to a copying approach, but what > you say merits trying it out. I agree that a copy would be cleaner. > >>> - mirage-nat works on whole Ethernet frames. I believe NAT only >>> applies to the IP layer - it would make my code cleaner if I could >>> strip off the Ethernet header when the frame arrives and just work >>> with the IP layer. It might simplify the mirage-nat API too. > > I'll think about this a bit. > >>> - I don't validate checksums on incoming packets, and always >>> recalculate after NAT before sending. We should probably track this >>> properly and support checksum offload. This will require an interface >>> change to NETWORK. >> >> Yeah, there's a general need for feature flags to be added to the >> NETWORK device interfaces... >> >> Looking forward to trying this out on my Cubieboard at home soon! -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 03 10:39:14 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 03 Jan 2016 10:39:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFg3y-0000Bx-ER; Sun, 03 Jan 2016 10:39:02 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aFg3w-0000BW-2P for mirageos-devel@lists.xenproject.org; Sun, 03 Jan 2016 10:39:00 +0000 Received: from [85.158.137.68] by server-15.bemta-3.messagelabs.com id 77/DA-12946-24AF8865; Sun, 03 Jan 2016 10:38:58 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-14.tower-31.messagelabs.com!1451817537!13634190!1 X-Originating-IP: [209.85.213.43] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 60804 invoked from network); 3 Jan 2016 10:38:57 -0000 Received: from mail-vk0-f43.google.com (HELO mail-vk0-f43.google.com) (209.85.213.43) by server-14.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 3 Jan 2016 10:38:57 -0000 Received: by mail-vk0-f43.google.com with SMTP id k1so110734492vkb.2 for ; Sun, 03 Jan 2016 02:38:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=YQ9ZAeK2dSdJllikwVXelshEN+CRERDN20w4GYX+O08=; b=q0ohDvx+ufwLFIcW2gFHtll7VttmecQk6B3wvpCxIVSztVOj1PLdH8zNuHGBePArXh f79s9vEFqKk3seSnNtgXU8Du9Fdzoek/+yyxTpomiHAwaaM2nwIJ+ckC5BT+M05MA9eU jBMqHdAlCwPNVCmbd5GpEm/VhLZVMZLnBNpcNusvA/AZKTSh46s0o5QzF/9wVnxUE70U JIZf3DXuOqd6ezMnl2pMcqjlw5XLnErDEfiVJVSDwmwetQmjKsNfAr8Un94O2BLbyjVE tYi2oLpcAWFFzBcYYVhl1c4/x97ZjPI/qFvOdEKkqypzXmUbWbXoQ6VVh+nuhpAiyXs+ pSRg== MIME-Version: 1.0 X-Received: by 10.31.168.205 with SMTP id r196mr57669534vke.120.1451817536596; Sun, 03 Jan 2016 02:38:56 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sun, 3 Jan 2016 02:38:56 -0800 (PST) In-Reply-To: <5687E017.2020807@somerandomidiot.com> References: <5D5DE037-E183-4A3F-B2EA-B0488CE95FB3@recoil.org> <5687E017.2020807@somerandomidiot.com> Date: Sun, 3 Jan 2016 10:38:56 +0000 Message-ID: From: Thomas Leonard To: Mindy Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] A Unikernel Firewall for QubesOS X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 2 January 2016 at 14:35, Mindy wrote: > On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >> >> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>> >>> I have a Mirage firewall running now under Qubes: >>> >>> >>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ >>> >> Awesome! > > > Seconded! This is very cool; I look forward to using it myself. :) > >> >>> There are some things that need fixing though: >>> >>> - I'm using an old version of mirage-nat, as the current version >>> requires Irmin. I think there were some plans to factor this out - >>> what's the status of this? > > In progress. I've been distracted by other things but hope to have it > finished soon. Having users for this library is a huge motivator, so in > combination with the points you raise below mirage-nat is probably headed > for a 1.0 re Great :-) Having this library saved me a huge amount of work! >>> I think only the new version has code to >>> expire entries, right? > > > Yes, but with some very stupid and broken logic; rather than doing anything > intelligent with state tracking there's a simple wall-clock-based timeout > with a much longer horizon for TCP connections than UDP ones. It really > ought to do something smarter before release. As a quick workaround, mirage-firewall now drops the entire NAT table if it runs out of memory or takes too long to find a free port. >>> - You need to generate an unused port for NAT. I copied simple-nat's >>> system of picking a random number and retrying but (as the TODO there >>> says) this will eventually run out of ports and hang. I assume we >>> should add some kind of free-port tracking to tcpip, right? pcb.ml's >>> getid has a better strategy of searching forward from the last port it >>> used, but it will also hang if it runs out (as noted by another TODO). >>> The UDP code doesn't seem to track free ports at all (fails with a >>> TODO if you ask it to pick a free one). >> >> Yes, we need a standalone free-port picking datastructure for a few >> things: >> - udp source port selection >> - tcp/ip source port selection >> - ipv4 id selection also needs some form of non-repeating selector >> but we don't currently fragment outbound at the moment. >> >> For randomising this, a linear congruential generator is what the >> OpenBSD stack uses. > > > Agreed with all above. > >> >>> - I'm not sure what the protocol is for disconnecting netback clients. >>> Currently I just set the interface state to Closed, but the XenStore >>> directory in "backend/vif" remains - is this documented somewhere? >> >> Good question, not sure. >> >>> - Mirage allows you to access memory after unmapping it. This isn't >>> safe (may page-fault or give access to someone else's data). I've >>> added checks in mirage-net-xen to make sure we don't try to access a >>> ring after unmapping it [1], but I think this should be fixed at the >>> Bigarray level [2]. >>> >> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >> have a checkout handy here and it's hard to map a commit to the >> associated PRs in the web UI. I haven't submitted a PR yet. Need to update it to master and test. >>> - mirage-nat doesn't do NAT for ICMP packets, so ping doesn't work yet. >> >> Presumably this also means that UDP NAT doesnt work? UDP NAT seems to be working fine. mirage-firewall uses it to redirect DNS requests. > Since most firewalls implement default-drop for incoming packets which don't > match a rule, most stacks are quite used to not receiving ICMP errors for > attempted UDP connections that aren't to open ports. Or possibly I > misunderstand? At any rate, mirage-nat creates rules for UDP connections > and rewrites headers just as it does for TCP. > >>> - mirage-nat mutates packets in-place. It might be cleaner if it made >>> a copy instead (it could copy just the header and return [new_header; >>> old_payload]). Since mirage-net copies the data into the shared ring >>> anyway, there should be very little overhead to doing it this way > > I had assumed there would be high overhead to a copying approach, but what > you say merits trying it out. I agree that a copy would be cleaner. > >>> - mirage-nat works on whole Ethernet frames. I believe NAT only >>> applies to the IP layer - it would make my code cleaner if I could >>> strip off the Ethernet header when the frame arrives and just work >>> with the IP layer. It might simplify the mirage-nat API too. > > I'll think about this a bit. > >>> - I don't validate checksums on incoming packets, and always >>> recalculate after NAT before sending. We should probably track this >>> properly and support checksum offload. This will require an interface >>> change to NETWORK. >> >> Yeah, there's a general need for feature flags to be added to the >> NETWORK device interfaces... >> >> Looking forward to trying this out on my Cubieboard at home soon! -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 04 12:27:36 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 04 Jan 2016 12:27:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aG4ER-0006pQ-AS; Mon, 04 Jan 2016 12:27:27 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aG4EP-0006pK-Vy for mirageos-devel@lists.xenproject.org; Mon, 04 Jan 2016 12:27:26 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 83/6B-27104-D256A865; Mon, 04 Jan 2016 12:27:25 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-16.tower-21.messagelabs.com!1451910444!3900566!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.2 required=7.0 tests=RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 11775 invoked from network); 4 Jan 2016 12:27:24 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-16.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 4 Jan 2016 12:27:24 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 1453c365; Mon, 4 Jan 2016 12:27:23 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=MJvcUWjAvaUwvQTqqFIJXyjKccM=; b=BzdbF50eIHCeDx7LVQ 6HO3aKcyYzV8sfx+GpK6kIa15ynYYXQve5WtpYB7WTjIMcEgM77ZOxKvjDf02UUG mSfswfuntEWtaszh3EuF6uEwbIgyos8NnkzGHrBFD9Pmf8PvLPYXuUaQcV6Hg89v 2HgAyzj/KIn6bkTBD112bn96I= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= selector1; b=EsUB7Tb7Mm+OxX8QBpreG6BnAzFx67pc+Ez4JS6mr9isLPvidT6 GstGU2ZDfkHyLD7iERWAFXFfYyL5p+bGnjr7rQ/s/wDf7qlUdTUPdtMGHNunqurt /LKGmAE0T/Gtdf4bvZNZQvLUplpNfs3DhnkpF3Xs0MQ+SCH456rsb2Sk= Received: by bark.recoil.org (OpenSMTPD) with ESMTPSA id c046b084 TLS version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO; Mon, 4 Jan 2016 12:27:23 +0000 (GMT) Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) From: Anil Madhavapeddy In-Reply-To: <20160104121514.GB906@nodbug.lucina.net> Date: Mon, 4 Jan 2016 12:27:20 +0000 Message-Id: <9FD6403E-920C-44BE-AAE2-976B14D200A4@recoil.org> References: <20151221142552.GA5387@nodbug.lucina.net> <567FC653.9060605@iki.fi> <20151227191025.GA10060@nodbug.lucina.net> <56853624.2080802@iki.fi> <20160104121514.GB906@nodbug.lucina.net> To: martin@lucina.net X-Mailer: Apple Mail (2.3096.5) Cc: rumpkernel-users , mirageos-devel Subject: Re: [MirageOS-devel] [RFC/PULL]: Rumprun configuration specification and rototill X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 4 Jan 2016, at 12:15, Martin Lucina wrote: > > If I have a Mirage/Rumprun hybrid unikernel (whether using -k or not, > irrelevant) and I would like Rumprun to mount some block devices, but > Mirage to handle the network stack, can I express this using a single > JSON configuration? > > I've not thought about this enough, but it would seem to imply that Rumprun > config would handle "fs", but not "net", which would be passed to Mirage > somehow. A strawman of how this could work: > > 1) We would need to specify the method that rumprun uses to pass the > configuration on to the application. This could be as simple as writing it > out to "/config.json". > > 2) In a hybrid unikernel as described above, presumably -lrumpnet_netinet > and -lrumpnet_netinet6 would not be linked in. This would have to be > exposed to config.c somehow (through a data structure with a list of > baked-in components at rumprun-bake time?), and on this basis (no netinet), > config.c would not handle those parts of the configuration. > > I may be completely off on the wrong track here -- would appreciate input > from the Mirage (and other?) unikernel folks on this list. This would also > be a good discussion to have on the "cross-project" unikernel.org once the > discourse.org setup there is complete. It sounds to me like this is a map function over the configuration: you want to pass the JSON tree to a function that descends over the various nodes that convert the configuration into a concrete (device_tree,linker) tuple. The output of this could then grabbed by the linker or domain builder in order to satisfy their particular jobs. Bear in mind that Mirage or HalVM may also want their own linking flags that are OCaml- or Haskell- specific as well. So if Mirage provided a set of command-line binaries that accepted a JSON configuration fragment for just the network and storage setup, and rumprun have the ability to shell out to them to delegate a portion of the configuration, that might be a nice way to glue different toolchains together...? (Assuming I've understood rumprun's role in this correctly as the main entrypoint command). -anil _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 04 12:27:36 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 04 Jan 2016 12:27:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aG4ER-0006pQ-AS; Mon, 04 Jan 2016 12:27:27 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aG4EP-0006pK-Vy for mirageos-devel@lists.xenproject.org; Mon, 04 Jan 2016 12:27:26 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 83/6B-27104-D256A865; Mon, 04 Jan 2016 12:27:25 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-16.tower-21.messagelabs.com!1451910444!3900566!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.2 required=7.0 tests=RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 11775 invoked from network); 4 Jan 2016 12:27:24 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-16.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 4 Jan 2016 12:27:24 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 1453c365; Mon, 4 Jan 2016 12:27:23 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=MJvcUWjAvaUwvQTqqFIJXyjKccM=; b=BzdbF50eIHCeDx7LVQ 6HO3aKcyYzV8sfx+GpK6kIa15ynYYXQve5WtpYB7WTjIMcEgM77ZOxKvjDf02UUG mSfswfuntEWtaszh3EuF6uEwbIgyos8NnkzGHrBFD9Pmf8PvLPYXuUaQcV6Hg89v 2HgAyzj/KIn6bkTBD112bn96I= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= selector1; b=EsUB7Tb7Mm+OxX8QBpreG6BnAzFx67pc+Ez4JS6mr9isLPvidT6 GstGU2ZDfkHyLD7iERWAFXFfYyL5p+bGnjr7rQ/s/wDf7qlUdTUPdtMGHNunqurt /LKGmAE0T/Gtdf4bvZNZQvLUplpNfs3DhnkpF3Xs0MQ+SCH456rsb2Sk= Received: by bark.recoil.org (OpenSMTPD) with ESMTPSA id c046b084 TLS version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO; Mon, 4 Jan 2016 12:27:23 +0000 (GMT) Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) From: Anil Madhavapeddy In-Reply-To: <20160104121514.GB906@nodbug.lucina.net> Date: Mon, 4 Jan 2016 12:27:20 +0000 Message-Id: <9FD6403E-920C-44BE-AAE2-976B14D200A4@recoil.org> References: <20151221142552.GA5387@nodbug.lucina.net> <567FC653.9060605@iki.fi> <20151227191025.GA10060@nodbug.lucina.net> <56853624.2080802@iki.fi> <20160104121514.GB906@nodbug.lucina.net> To: martin@lucina.net X-Mailer: Apple Mail (2.3096.5) Cc: rumpkernel-users , mirageos-devel Subject: Re: [MirageOS-devel] [RFC/PULL]: Rumprun configuration specification and rototill X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 4 Jan 2016, at 12:15, Martin Lucina wrote: > > If I have a Mirage/Rumprun hybrid unikernel (whether using -k or not, > irrelevant) and I would like Rumprun to mount some block devices, but > Mirage to handle the network stack, can I express this using a single > JSON configuration? > > I've not thought about this enough, but it would seem to imply that Rumprun > config would handle "fs", but not "net", which would be passed to Mirage > somehow. A strawman of how this could work: > > 1) We would need to specify the method that rumprun uses to pass the > configuration on to the application. This could be as simple as writing it > out to "/config.json". > > 2) In a hybrid unikernel as described above, presumably -lrumpnet_netinet > and -lrumpnet_netinet6 would not be linked in. This would have to be > exposed to config.c somehow (through a data structure with a list of > baked-in components at rumprun-bake time?), and on this basis (no netinet), > config.c would not handle those parts of the configuration. > > I may be completely off on the wrong track here -- would appreciate input > from the Mirage (and other?) unikernel folks on this list. This would also > be a good discussion to have on the "cross-project" unikernel.org once the > discourse.org setup there is complete. It sounds to me like this is a map function over the configuration: you want to pass the JSON tree to a function that descends over the various nodes that convert the configuration into a concrete (device_tree,linker) tuple. The output of this could then grabbed by the linker or domain builder in order to satisfy their particular jobs. Bear in mind that Mirage or HalVM may also want their own linking flags that are OCaml- or Haskell- specific as well. So if Mirage provided a set of command-line binaries that accepted a JSON configuration fragment for just the network and storage setup, and rumprun have the ability to shell out to them to delegate a portion of the configuration, that might be a nice way to glue different toolchains together...? (Assuming I've understood rumprun's role in this correctly as the main entrypoint command). -anil _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 04 14:26:31 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 04 Jan 2016 14:26:31 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aG65U-00069O-PJ; Mon, 04 Jan 2016 14:26:20 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aG65T-00069J-Nu for mirageos-devel@lists.xenproject.org; Mon, 04 Jan 2016 14:26:19 +0000 Received: from [85.158.137.68] by server-16.bemta-3.messagelabs.com id 3E/7D-07451-A018A865; Mon, 04 Jan 2016 14:26:18 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-8.tower-31.messagelabs.com!1451917575!13953244!1 X-Originating-IP: [209.85.213.53] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 35607 invoked from network); 4 Jan 2016 14:26:16 -0000 Received: from mail-vk0-f53.google.com (HELO mail-vk0-f53.google.com) (209.85.213.53) by server-8.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 4 Jan 2016 14:26:16 -0000 Received: by mail-vk0-f53.google.com with SMTP id a123so91414682vkh.1 for ; Mon, 04 Jan 2016 06:26:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=gtRTv9LSe8ladA8iVPf3yBtW+lIs1vnbGoIUI4CBWzs=; b=Y54SwBrr67SHaXkWzSZkStULhN6kD8uefc4bADfUVGprpFn5xuKcG48PR2RRO2CZ84 wmXNTfX/iKjaLmlCG+LUAZh48skNXVOCJiPlaFjisH3Gdk4lUyAI/ZZHiYrWLbjGU7DH Jebssh7ExdKFx1ktEf+Ns4kyNCNU/zq44XJjiaIHzOfVfjz9CWALEx5OvCZpAgy5JjXw EVtWNsKfHGZF0lZaLF6ChNeeU53gvsQPXBVfKeWMysMO9TF9bzQH1KvGh1H/U7vJrb/O QvrO/AoCJy6JWAOpeDgzpGwNg7FRj7AY8pgMfikyZd1aSTsMo1foNFV7aCy7WCBFeoYD 4ZLw== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr61980701vki.41.1451917575333; Mon, 04 Jan 2016 06:26:15 -0800 (PST) Received: by 10.31.128.84 with HTTP; Mon, 4 Jan 2016 06:26:15 -0800 (PST) Date: Mon, 4 Jan 2016 14:26:15 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] Unmapping grants is unsafe X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 3 January 2016 at 10:38, Thomas Leonard wrote: > On 2 January 2016 at 14:35, Mindy wrote: >> On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >>> >>> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>>> >>>> I have a Mirage firewall running now under Qubes: >>>> >>>> >>>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ [...] >>>> - Mirage allows you to access memory after unmapping it. This isn't >>>> safe (may page-fault or give access to someone else's data). I've >>>> added checks in mirage-net-xen to make sure we don't try to access a >>>> ring after unmapping it [1], but I think this should be fixed at the >>>> Bigarray level [2]. >>>> >>> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >>> have a checkout handy here and it's hard to map a commit to the >>> associated PRs in the web UI. > > I haven't submitted a PR yet. Need to update it to master and test. https://github.com/ocaml/ocaml/pull/389 However, they're not keen on merging it, for performance reasons. Also, it would mean changing Cstruct, which currently says: > We try to maintain the property that no constructed [t] can ever point out of > its underlying buffer. This property is guarded by all of the constructing > functions and the fact that the type is private, and used by various > functions that would otherwise be completely unsafe. I wonder if we should instead change Gnt.Gnttab.Local_mapping.to_buf so that instead of returning an Io_page it returns something else, which provides similar operations but: a) checks every access to ensure it hasn't been unmapped, and b) doesn't allow you to get a Cstruct or Bigarray from it. However, this would mean a largish API change. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 04 14:26:31 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 04 Jan 2016 14:26:31 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aG65U-00069O-PJ; Mon, 04 Jan 2016 14:26:20 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aG65T-00069J-Nu for mirageos-devel@lists.xenproject.org; Mon, 04 Jan 2016 14:26:19 +0000 Received: from [85.158.137.68] by server-16.bemta-3.messagelabs.com id 3E/7D-07451-A018A865; Mon, 04 Jan 2016 14:26:18 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-8.tower-31.messagelabs.com!1451917575!13953244!1 X-Originating-IP: [209.85.213.53] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 35607 invoked from network); 4 Jan 2016 14:26:16 -0000 Received: from mail-vk0-f53.google.com (HELO mail-vk0-f53.google.com) (209.85.213.53) by server-8.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 4 Jan 2016 14:26:16 -0000 Received: by mail-vk0-f53.google.com with SMTP id a123so91414682vkh.1 for ; Mon, 04 Jan 2016 06:26:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=gtRTv9LSe8ladA8iVPf3yBtW+lIs1vnbGoIUI4CBWzs=; b=Y54SwBrr67SHaXkWzSZkStULhN6kD8uefc4bADfUVGprpFn5xuKcG48PR2RRO2CZ84 wmXNTfX/iKjaLmlCG+LUAZh48skNXVOCJiPlaFjisH3Gdk4lUyAI/ZZHiYrWLbjGU7DH Jebssh7ExdKFx1ktEf+Ns4kyNCNU/zq44XJjiaIHzOfVfjz9CWALEx5OvCZpAgy5JjXw EVtWNsKfHGZF0lZaLF6ChNeeU53gvsQPXBVfKeWMysMO9TF9bzQH1KvGh1H/U7vJrb/O QvrO/AoCJy6JWAOpeDgzpGwNg7FRj7AY8pgMfikyZd1aSTsMo1foNFV7aCy7WCBFeoYD 4ZLw== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr61980701vki.41.1451917575333; Mon, 04 Jan 2016 06:26:15 -0800 (PST) Received: by 10.31.128.84 with HTTP; Mon, 4 Jan 2016 06:26:15 -0800 (PST) Date: Mon, 4 Jan 2016 14:26:15 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] Unmapping grants is unsafe X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 3 January 2016 at 10:38, Thomas Leonard wrote: > On 2 January 2016 at 14:35, Mindy wrote: >> On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >>> >>> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>>> >>>> I have a Mirage firewall running now under Qubes: >>>> >>>> >>>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ [...] >>>> - Mirage allows you to access memory after unmapping it. This isn't >>>> safe (may page-fault or give access to someone else's data). I've >>>> added checks in mirage-net-xen to make sure we don't try to access a >>>> ring after unmapping it [1], but I think this should be fixed at the >>>> Bigarray level [2]. >>>> >>> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >>> have a checkout handy here and it's hard to map a commit to the >>> associated PRs in the web UI. > > I haven't submitted a PR yet. Need to update it to master and test. https://github.com/ocaml/ocaml/pull/389 However, they're not keen on merging it, for performance reasons. Also, it would mean changing Cstruct, which currently says: > We try to maintain the property that no constructed [t] can ever point out of > its underlying buffer. This property is guarded by all of the constructing > functions and the fact that the type is private, and used by various > functions that would otherwise be completely unsafe. I wonder if we should instead change Gnt.Gnttab.Local_mapping.to_buf so that instead of returning an Io_page it returns something else, which provides similar operations but: a) checks every access to ensure it hasn't been unmapped, and b) doesn't allow you to get a Cstruct or Bigarray from it. However, this would mean a largish API change. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 04 19:21:25 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 04 Jan 2016 19:21:25 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGAgt-000694-T0; Mon, 04 Jan 2016 19:21:15 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGAgs-00068t-Cp for mirageos-devel@lists.xenproject.org; Mon, 04 Jan 2016 19:21:14 +0000 Received: from [193.109.254.147] by server-11.bemta-14.messagelabs.com id 8B/A8-28228-926CA865; Mon, 04 Jan 2016 19:21:13 +0000 X-Env-Sender: djwillia@us.ibm.com X-Msg-Ref: server-8.tower-27.messagelabs.com!1451935269!10871861!1 X-Originating-IP: [32.97.110.153] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMzIuOTcuMTEwLjE1MyA9PiAzNjQwMzA=\n X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 58905 invoked from network); 4 Jan 2016 19:21:10 -0000 Received: from e35.co.us.ibm.com (HELO e35.co.us.ibm.com) (32.97.110.153) by server-8.tower-27.messagelabs.com with CAMELLIA256-SHA encrypted SMTP; 4 Jan 2016 19:21:10 -0000 Received: from localhost by e35.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 4 Jan 2016 12:21:07 -0700 X-IBM-Helo: d03dlp01.boulder.ibm.com X-IBM-MailFrom: djwillia@us.ibm.com X-IBM-RcptTo: mirageos-devel@lists.xenproject.org Received: from b03cxnp07029.gho.boulder.ibm.com (b03cxnp07029.gho.boulder.ibm.com [9.17.130.16]) by d03dlp01.boulder.ibm.com (Postfix) with ESMTP id 66F8D1FF0046 for ; Mon, 4 Jan 2016 12:09:17 -0700 (MST) Received: from d03av03.boulder.ibm.com (d03av03.boulder.ibm.com [9.17.195.169]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u04JL6kH28704922 for ; Mon, 4 Jan 2016 12:21:06 -0700 Received: from d03av03.boulder.ibm.com (localhost [127.0.0.1]) by d03av03.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u04JL6i9008559 for ; Mon, 4 Jan 2016 12:21:06 -0700 Received: from d50lp01.ny.us.ibm.com (d50lp01.pok.ibm.com [146.89.104.207]) by d03av03.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u04JL5Tp008434 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 4 Jan 2016 12:21:06 -0700 Message-Id: <201601041921.u04JL5Tp008434@d03av03.boulder.ibm.com> Received: from /spool/local by d50lp01.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 4 Jan 2016 14:21:05 -0500 Received: from smtp.notes.na.collabserv.com (192.155.248.66) by d50lp01.ny.us.ibm.com (158.87.18.20) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256/256) Mon, 4 Jan 2016 14:21:02 -0500 Received: from /spool/local by smtp.notes.na.collabserv.com with smtp.notes.na.collabserv.com ESMTP for from ; Mon, 4 Jan 2016 19:21:01 -0000 Received: from us1a3-smtp03.a3.dal06.isc4sb.com (10.106.154.94) by smtp.notes.na.collabserv.com (10.106.227.127) with smtp.notes.na.collabserv.com ESMTP; Mon, 4 Jan 2016 19:21:00 -0000 Received: from us1a3-mail131.a3.dal06.isc4sb.com ([10.146.45.162]) by us1a3-smtp03.a3.dal06.isc4sb.com with ESMTP id 2016010419212881-381377 ; Mon, 4 Jan 2016 19:21:28 +0000 To: mirageos-devel@lists.xenproject.org From: "Daniel J Williams" Date: Mon, 4 Jan 2016 14:20:57 -0500 X-KeepSent: 7254AD20:78A10D4E-00257F30:0068FA8D; type=4; name=$KeepSent X-Mailer: IBM Notes Release 9.0.1FP3 SHF226 March 23, 2015 X-LLNOutbound: False X-Disclaimed: 31271 X-TNEFEvaluated: 1 x-cbid: 16010419-0013-0000-0000-00001B8DBA7E X-IBM-ISS-SpamDetectors: Score=0.439231; BY=0.292875; FL=0; FP=0; FZ=0; HX=0; KW=0; PH=0; SC=0.439231; ST=0; TS=0; UL=0; ISC= X-IBM-ISS-DetailInfo: BY=3.00004754; HX=3.00000237; KW=3.00000007; PH=3.00000004; SC=3.00000129; SDB=6.00640505; UDB=6.00288202; UTC=2016-01-04 19:21:01 x-cbparentid: 16010419-9588-0000-0000-00000168856E X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER Subject: [MirageOS-devel] Announcing Solo5 (for Mirage on KVM/QEMU) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2892983238842837528==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============2892983238842837528== Content-type: multipart/alternative; Boundary="0__=8FBBF5A3DFFB7C1D8f9e8a93df938690918c8FBBF5A3DFFB7C1D" Content-Disposition: inline --0__=8FBBF5A3DFFB7C1D8f9e8a93df938690918c8FBBF5A3DFFB7C1D Content-Transfer-Encoding: quoted-printable Content-type: text/plain; charset=US-ASCII Hello Mirage community, Happy New Year! I've now released the minimal kernel library I mentioned a month ago on this list. It essentially initializes HW and bootstraps the Mirage OS stack (like mini-os, but runs on a bare HW abstraction from KVM/QEMU). It's called Solo5. Most interesting to others on this list is Solo5's ability to run a few Mirage applications on KVM/QEMU. I have bundled up the entire build environment into a Docker container, so hopefully trying things out is easy! Full instructions are available at: https://github.com/djwillia/solo5/tree/mirage Any and all feedback is welcome! Dan --0__=8FBBF5A3DFFB7C1D8f9e8a93df938690918c8FBBF5A3DFFB7C1D Content-Transfer-Encoding: quoted-printable Content-type: text/html; charset=US-ASCII Content-Disposition: inline

Hello Mirage community,

Happy New Year!<= /tt>

I've now released the minimal kernel library I mentioned a = month ago
on this list.  It essentially initializes HW and= bootstraps the Mirage
OS stack (like mini-os, but runs on a ba= re HW abstraction from
KVM/QEMU).  It's called Solo5.=

Most interesting to others on this list is Solo5's ability to r= un a
few Mirage applications on KVM/QEMU.  I have bundled = up the entire
build environment into a Docker container, so hop= efully trying things
out is easy!  Full instructions are a= vailable at:

https://github.com/djwillia/solo5/tree/mirage

<= tt>Any and all feedback is welcome!

Dan

--0__=8FBBF5A3DFFB7C1D8f9e8a93df938690918c8FBBF5A3DFFB7C1D-- --===============2892983238842837528== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============2892983238842837528==-- From mirageos-devel-bounces@lists.xenproject.org Mon Jan 04 19:21:25 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 04 Jan 2016 19:21:25 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGAgt-000694-T0; Mon, 04 Jan 2016 19:21:15 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGAgs-00068t-Cp for mirageos-devel@lists.xenproject.org; Mon, 04 Jan 2016 19:21:14 +0000 Received: from [193.109.254.147] by server-11.bemta-14.messagelabs.com id 8B/A8-28228-926CA865; Mon, 04 Jan 2016 19:21:13 +0000 X-Env-Sender: djwillia@us.ibm.com X-Msg-Ref: server-8.tower-27.messagelabs.com!1451935269!10871861!1 X-Originating-IP: [32.97.110.153] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMzIuOTcuMTEwLjE1MyA9PiAzNjQwMzA=\n X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 58905 invoked from network); 4 Jan 2016 19:21:10 -0000 Received: from e35.co.us.ibm.com (HELO e35.co.us.ibm.com) (32.97.110.153) by server-8.tower-27.messagelabs.com with CAMELLIA256-SHA encrypted SMTP; 4 Jan 2016 19:21:10 -0000 Received: from localhost by e35.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 4 Jan 2016 12:21:07 -0700 X-IBM-Helo: d03dlp01.boulder.ibm.com X-IBM-MailFrom: djwillia@us.ibm.com X-IBM-RcptTo: mirageos-devel@lists.xenproject.org Received: from b03cxnp07029.gho.boulder.ibm.com (b03cxnp07029.gho.boulder.ibm.com [9.17.130.16]) by d03dlp01.boulder.ibm.com (Postfix) with ESMTP id 66F8D1FF0046 for ; Mon, 4 Jan 2016 12:09:17 -0700 (MST) Received: from d03av03.boulder.ibm.com (d03av03.boulder.ibm.com [9.17.195.169]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u04JL6kH28704922 for ; Mon, 4 Jan 2016 12:21:06 -0700 Received: from d03av03.boulder.ibm.com (localhost [127.0.0.1]) by d03av03.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u04JL6i9008559 for ; Mon, 4 Jan 2016 12:21:06 -0700 Received: from d50lp01.ny.us.ibm.com (d50lp01.pok.ibm.com [146.89.104.207]) by d03av03.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u04JL5Tp008434 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 4 Jan 2016 12:21:06 -0700 Message-Id: <201601041921.u04JL5Tp008434@d03av03.boulder.ibm.com> Received: from /spool/local by d50lp01.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256/256) Mon, 4 Jan 2016 14:21:02 -0500 Received: from /spool/local by smtp.notes.na.collabserv.com with smtp.notes.na.collabserv.com ESMTP for from ; Mon, 4 Jan 2016 19:21:01 -0000 Received: from us1a3-smtp03.a3.dal06.isc4sb.com (10.106.154.94) by smtp.notes.na.collabserv.com (10.106.227.127) with smtp.notes.na.collabserv.com ESMTP; Mon, 4 Jan 2016 19:21:00 -0000 Received: from us1a3-mail131.a3.dal06.isc4sb.com ([10.146.45.162]) by us1a3-smtp03.a3.dal06.isc4sb.com with ESMTP id 2016010419212881-381377 ; Mon, 4 Jan 2016 19:21:28 +0000 To: mirageos-devel@lists.xenproject.org From: "Daniel J Williams" Date: Mon, 4 Jan 2016 14:20:57 -0500 X-KeepSent: 7254AD20:78A10D4E-00257F30:0068FA8D; type=4; name=$KeepSent X-Mailer: IBM Notes Release 9.0.1FP3 SHF226 March 23, 2015 X-LLNOutbound: False X-Disclaimed: 31271 X-TNEFEvaluated: 1 x-cbid: 16010419-0013-0000-0000-00001B8DBA7E X-IBM-ISS-SpamDetectors: Score=0.439231; BY=0.292875; FL=0; FP=0; FZ=0; HX=0; KW=0; PH=0; SC=0.439231; ST=0; TS=0; UL=0; ISC= X-IBM-ISS-DetailInfo: BY=3.00004754; HX=3.00000237; KW=3.00000007; PH=3.00000004; SC=3.00000129; SDB=6.00640505; UDB=6.00288202; UTC=2016-01-04 19:21:01 x-cbparentid: 16010419-9588-0000-0000-00000168856E X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER Subject: [MirageOS-devel] Announcing Solo5 (for Mirage on KVM/QEMU) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2892983238842837528==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============2892983238842837528== Content-type: multipart/alternative; Boundary="0__=8FBBF5A3DFFB7C1D8f9e8a93df938690918c8FBBF5A3DFFB7C1D" Content-Disposition: inline --0__=8FBBF5A3DFFB7C1D8f9e8a93df938690918c8FBBF5A3DFFB7C1D Content-Transfer-Encoding: quoted-printable Content-type: text/plain; charset=US-ASCII Hello Mirage community, Happy New Year! I've now released the minimal kernel library I mentioned a month ago on this list. It essentially initializes HW and bootstraps the Mirage OS stack (like mini-os, but runs on a bare HW abstraction from KVM/QEMU). It's called Solo5. Most interesting to others on this list is Solo5's ability to run a few Mirage applications on KVM/QEMU. I have bundled up the entire build environment into a Docker container, so hopefully trying things out is easy! Full instructions are available at: https://github.com/djwillia/solo5/tree/mirage Any and all feedback is welcome! Dan --0__=8FBBF5A3DFFB7C1D8f9e8a93df938690918c8FBBF5A3DFFB7C1D Content-Transfer-Encoding: quoted-printable Content-type: text/html; charset=US-ASCII Content-Disposition: inline

Hello Mirage community,

Happy New Year!<= /tt>

I've now released the minimal kernel library I mentioned a = month ago
on this list.  It essentially initializes HW and= bootstraps the Mirage
OS stack (like mini-os, but runs on a ba= re HW abstraction from
KVM/QEMU).  It's called Solo5.=

Most interesting to others on this list is Solo5's ability to r= un a
few Mirage applications on KVM/QEMU.  I have bundled = up the entire
build environment into a Docker container, so hop= efully trying things
out is easy!  Full instructions are a= vailable at:

https://github.com/djwillia/solo5/tree/mirage

<= tt>Any and all feedback is welcome!

Dan

--0__=8FBBF5A3DFFB7C1D8f9e8a93df938690918c8FBBF5A3DFFB7C1D-- --===============2892983238842837528== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============2892983238842837528==-- From mirageos-devel-bounces@lists.xenproject.org Mon Jan 04 19:36:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 04 Jan 2016 19:36:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGAvN-0006ou-Pm; Mon, 04 Jan 2016 19:36:13 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGAvM-0006ok-6k for mirageos-devel@lists.xenproject.org; Mon, 04 Jan 2016 19:36:12 +0000 Received: from [85.158.137.68] by server-6.bemta-3.messagelabs.com id 6C/07-29649-BA9CA865; Mon, 04 Jan 2016 19:36:11 +0000 X-Env-Sender: amc79@cam.ac.uk X-Msg-Ref: server-15.tower-31.messagelabs.com!1451936168!13576256!1 X-Originating-IP: [131.111.8.133] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 49814 invoked from network); 4 Jan 2016 19:36:08 -0000 Received: from ppsw-33.csi.cam.ac.uk (HELO ppsw-33.csi.cam.ac.uk) (131.111.8.133) by server-15.tower-31.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 4 Jan 2016 19:36:08 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from cpc91232-cmbg18-2-0-cust222.5-4.cable.virginm.net ([82.2.124.223]:38061 helo=[10.0.1.8]) by ppsw-33.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.157]:25) with esmtpsa (PLAIN:amc79) (TLSv1:ECDHE-RSA-AES256-SHA:256) id 1aGAvI-000KUA-hR (Exim 4.86_36-e07b163) (return-path ); Mon, 04 Jan 2016 19:36:08 +0000 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Amir Chaudhry In-Reply-To: <201601041921.u04JL5Tp008434@d03av03.boulder.ibm.com> Date: Mon, 4 Jan 2016 19:36:07 +0000 Message-Id: <92667048-70B0-4D95-BF86-98D3CAD145C2@cam.ac.uk> References: <201601041921.u04JL5Tp008434@d03av03.boulder.ibm.com> To: Daniel J Williams X-Mailer: Apple Mail (2.2104) Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Announcing Solo5 (for Mirage on KVM/QEMU) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256/256) Mon, 4 Jan 2016 15:16:01 -0500 Received: from /spool/local by smtp.notes.na.collabserv.com with smtp.notes.na.collabserv.com ESMTP for from ; Mon, 4 Jan 2016 20:16:00 -0000 Received: from us1a3-smtp04.a3.dal06.isc4sb.com (10.106.154.237) by smtp.notes.na.collabserv.com (10.106.227.143) with smtp.notes.na.collabserv.com ESMTP; Mon, 4 Jan 2016 20:15:57 -0000 Received: from us1a3-mail131.a3.dal06.isc4sb.com ([10.146.45.162]) by us1a3-smtp04.a3.dal06.isc4sb.com with ESMTP id 2016010420155671-403201 ; Mon, 4 Jan 2016 20:15:56 +0000 In-Reply-To: <92667048-70B0-4D95-BF86-98D3CAD145C2@cam.ac.uk> To: Amir Chaudhry From: "Daniel J Williams" Date: Mon, 4 Jan 2016 15:15:54 -0500 References: <201601041921.u04JL5Tp008434@d03av03.boulder.ibm.com> <92667048-70B0-4D95-BF86-98D3CAD145C2@cam.ac.uk> X-KeepSent: 986B0BB6:348D2D94-00257F30:006F1049; type=4; name=$KeepSent X-Mailer: IBM Notes Release 9.0.1FP3 SHF226 March 23, 2015 X-LLNOutbound: False X-Disclaimed: 63187 X-TNEFEvaluated: 1 x-cbid: 16010420-0041-0000-0000-000002F21190 X-IBM-ISS-SpamDetectors: Score=0.4332; 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256/256) Mon, 4 Jan 2016 15:16:01 -0500 Received: from /spool/local by smtp.notes.na.collabserv.com with smtp.notes.na.collabserv.com ESMTP for from ; Mon, 4 Jan 2016 20:16:00 -0000 Received: from us1a3-smtp04.a3.dal06.isc4sb.com (10.106.154.237) by smtp.notes.na.collabserv.com (10.106.227.143) with smtp.notes.na.collabserv.com ESMTP; Mon, 4 Jan 2016 20:15:57 -0000 Received: from us1a3-mail131.a3.dal06.isc4sb.com ([10.146.45.162]) by us1a3-smtp04.a3.dal06.isc4sb.com with ESMTP id 2016010420155671-403201 ; Mon, 4 Jan 2016 20:15:56 +0000 In-Reply-To: <92667048-70B0-4D95-BF86-98D3CAD145C2@cam.ac.uk> To: Amir Chaudhry From: "Daniel J Williams" Date: Mon, 4 Jan 2016 15:15:54 -0500 References: <201601041921.u04JL5Tp008434@d03av03.boulder.ibm.com> <92667048-70B0-4D95-BF86-98D3CAD145C2@cam.ac.uk> X-KeepSent: 986B0BB6:348D2D94-00257F30:006F1049; type=4; name=$KeepSent X-Mailer: IBM Notes Release 9.0.1FP3 SHF226 March 23, 2015 X-LLNOutbound: False X-Disclaimed: 63187 X-TNEFEvaluated: 1 x-cbid: 16010420-0041-0000-0000-000002F21190 X-IBM-ISS-SpamDetectors: Score=0.4332; 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charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============5618314336065451380==-- From mirageos-devel-bounces@lists.xenproject.org Tue Jan 05 11:58:59 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 05 Jan 2016 11:58:59 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGQGI-00072F-K0; Tue, 05 Jan 2016 11:58:50 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGQGH-000728-CV for mirageos-devel@lists.xenproject.org; Tue, 05 Jan 2016 11:58:49 +0000 Received: from [85.158.137.68] by server-9.bemta-3.messagelabs.com id 4F/99-03066-8FFAB865; Tue, 05 Jan 2016 11:58:48 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-12.tower-31.messagelabs.com!1451995121!13940327!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.5 required=7.0 tests=HTML_60_70,HTML_MESSAGE, RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; 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Tue, 5 Jan 2016 11:58:40 +0000 (GMT) From: Anil Madhavapeddy Date: Tue, 5 Jan 2016 11:58:39 +0000 References: To: mirageos-devel Message-Id: Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) X-Mailer: Apple Mail (2.3096.5) Subject: [MirageOS-devel] Fwd: [ocaml] Warning for missing .cmx files (#319) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============8091904016104413640==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============8091904016104413640== Content-Type: multipart/alternative; boundary="Apple-Mail=_EB35AE0E-38E6-4EED-B8C0-3C434CF2B304" --Apple-Mail=_EB35AE0E-38E6-4EED-B8C0-3C434CF2B304 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 The cool features in OCaml 4.03 are adding up -- in addition to the low = latency garbage collection patches, this one ensures that all of the = .cmx files are always available during linking. If they are not, then = cross-module inlining is currently silently turned off, but with this, = we can ensure the highest performance unikernel link. Anil > Begin forwarded message: >=20 > From: Leo White > Date: 29 November 2015 at 18:29:09 GMT > To: ocaml/ocaml > Subject: [ocaml] Warning for missing .cmx files (#319) >=20 > This patch adds a warning for missing cmx files during cross-module = inlining. This is useful because currently a misspecified build can = silently damage the performance of programs. >=20 > The patch also extends the -opaque option to work on .mli files. Using = -opaque on an .ml file means that its implementation should not be = considered for cross-module inlining. Using -opaque on an .mli file = means that no implementation of that interface should be considered for = cross-module inlining. >=20 > If an interface is marked as opaque then the compiler does not search = for a .cmx file, and so the new warning will not be triggered. This = means that modules which are intended to be chosen at link-time (and so = deliberately hide .cmx files) can avoid unnecessarily triggering the = warning. >=20 > As an illustration of the utility of this new warning, not all cmx = files were installed by the OCaml distribution, and the patch also = adjusts the installation rules to install these files (which were in = compiler-libs and ocamldoc). >=20 > You can view, comment on, or merge this pull request online at: >=20 > https://github.com/ocaml/ocaml/pull/319 = > Commit Summary >=20 > Add warning for missing .cmx files > Install compiler libs .cmx files > Install ocamldoc .cmx files > File Changes >=20 > M Makefile (2) > M asmcomp/closure.ml = (2) > M asmcomp/compilenv.ml = (24) > M ocamldoc/Makefile = (2) > M typing/cmi_format.ml = (4) > M typing/cmi_format.mli = (4) > M typing/cmt_format.ml = (9) > M typing/env.ml = (33) > M typing/env.mli = (3) > M utils/warnings.ml = (6) > M utils/warnings.mli = (1) > Patch Links: >=20 > https://github.com/ocaml/ocaml/pull/319.patch = > https://github.com/ocaml/ocaml/pull/319.diff = > =E2=80=94 > Reply to this email directly or view it on GitHub = . >=20 --Apple-Mail=_EB35AE0E-38E6-4EED-B8C0-3C434CF2B304 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 The cool features in OCaml 4.03 are adding up -- in addition = to the low latency garbage collection patches, this one ensures that all = of the .cmx files are always available during linking.  If they are = not, then cross-module inlining is currently silently turned off, but = with this, we can ensure the highest performance unikernel link.


Anil


Begin forwarded message:

From: = Leo White <notifications@github.com>
Date: = 29 November 2015 at 18:29:09 = GMT
To: = ocaml/ocaml <ocaml@noreply.github.com>
Subject: = [ocaml] Warning = for missing .cmx files (#319)

This patch adds a warning for = missing cmx files during cross-module inlining. This is useful because = currently a misspecified build can silently damage the performance of = programs.

The patch also extends the -opaque option to work on .mli files. Using -opaque on an .ml file means that its implementation = should not be considered for cross-module inlining. Using -opaque on an .mli file means that no implementation = of that interface should be considered for cross-module inlining.

If an interface is marked as opaque = then the compiler does not search for a .cmx file, and so the new = warning will not be triggered. This means that modules which are = intended to be chosen at link-time (and so deliberately hide .cmx files) = can avoid unnecessarily triggering the warning.

As an = illustration of the utility of this new warning, not all cmx files were = installed by the OCaml distribution, and the patch also adjusts the = installation rules to install these files (which were in compiler-libs = and ocamldoc).

You can view, comment on, or merge this pull request = online at:

  https://github.com/ocaml/ocaml/pull/319

Commit Summary

  • Add warning for missing .cmx files
  • Install compiler libs .cmx files
  • Install ocamldoc .cmx files

File Changes

Patch Links:

=E2=80=94
Reply to this email directly or view it on = GitHub.3D""


= --Apple-Mail=_EB35AE0E-38E6-4EED-B8C0-3C434CF2B304-- --===============8091904016104413640== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============8091904016104413640==-- From mirageos-devel-bounces@lists.xenproject.org Tue Jan 05 11:58:59 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 05 Jan 2016 11:58:59 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGQGI-00072F-K0; Tue, 05 Jan 2016 11:58:50 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGQGH-000728-CV for mirageos-devel@lists.xenproject.org; Tue, 05 Jan 2016 11:58:49 +0000 Received: from [85.158.137.68] by server-9.bemta-3.messagelabs.com id 4F/99-03066-8FFAB865; Tue, 05 Jan 2016 11:58:48 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-12.tower-31.messagelabs.com!1451995121!13940327!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.5 required=7.0 tests=HTML_60_70,HTML_MESSAGE, RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 10218 invoked from network); 5 Jan 2016 11:58:41 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-12.tower-31.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 5 Jan 2016 11:58:41 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 5c1fd63b for ; Tue, 5 Jan 2016 11:58:40 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=from :content-type:subject:date:references:to:message-id :mime-version; s=selector1; bh=bweibAIJPBfkTCEUp2pnshMNoMM=; b=U GTrkaQnrxPnJYR+2P1QNMa1kRyBGwIvPKWhJc56e97IMZYD1WeEwbFKTa+a3G5sp J6nE52iBs8uUtOUp7BkJsNIE86J0700n3YyusYvaMzOhhkPX3Ms12xSsoo5u1c/+ h1lQEbTGcBMLpNoUR9CwAjLMDMvVqZB9CA5RGPacn4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=from :content-type:subject:date:references:to:message-id :mime-version; q=dns; s=selector1; b=CPSDOTnfYx5VQCc2/1totUY9eb1 Dds5SeKgHRqDisia2sdjbsXShNaiKB0xCIuGPeFVDAUdbgTzuYcTDfTK4TQe4Sr0 LyEuT7q6rb2HKiUB9FrQREXWi8tenrK69drpIxvbk5K7LPxud25/T0+Kue2seFqJ hRmafY+VX2QDKKxc= Received: by bark.recoil.org (OpenSMTPD) with ESMTPSA id 95fdf582 TLS version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO for ; Tue, 5 Jan 2016 11:58:40 +0000 (GMT) From: Anil Madhavapeddy Date: Tue, 5 Jan 2016 11:58:39 +0000 References: To: mirageos-devel Message-Id: Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) X-Mailer: Apple Mail (2.3096.5) Subject: [MirageOS-devel] Fwd: [ocaml] Warning for missing .cmx files (#319) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============8091904016104413640==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============8091904016104413640== Content-Type: multipart/alternative; boundary="Apple-Mail=_EB35AE0E-38E6-4EED-B8C0-3C434CF2B304" --Apple-Mail=_EB35AE0E-38E6-4EED-B8C0-3C434CF2B304 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 The cool features in OCaml 4.03 are adding up -- in addition to the low = latency garbage collection patches, this one ensures that all of the = .cmx files are always available during linking. If they are not, then = cross-module inlining is currently silently turned off, but with this, = we can ensure the highest performance unikernel link. Anil > Begin forwarded message: >=20 > From: Leo White > Date: 29 November 2015 at 18:29:09 GMT > To: ocaml/ocaml > Subject: [ocaml] Warning for missing .cmx files (#319) >=20 > This patch adds a warning for missing cmx files during cross-module = inlining. This is useful because currently a misspecified build can = silently damage the performance of programs. >=20 > The patch also extends the -opaque option to work on .mli files. Using = -opaque on an .ml file means that its implementation should not be = considered for cross-module inlining. Using -opaque on an .mli file = means that no implementation of that interface should be considered for = cross-module inlining. >=20 > If an interface is marked as opaque then the compiler does not search = for a .cmx file, and so the new warning will not be triggered. This = means that modules which are intended to be chosen at link-time (and so = deliberately hide .cmx files) can avoid unnecessarily triggering the = warning. >=20 > As an illustration of the utility of this new warning, not all cmx = files were installed by the OCaml distribution, and the patch also = adjusts the installation rules to install these files (which were in = compiler-libs and ocamldoc). >=20 > You can view, comment on, or merge this pull request online at: >=20 > https://github.com/ocaml/ocaml/pull/319 = > Commit Summary >=20 > Add warning for missing .cmx files > Install compiler libs .cmx files > Install ocamldoc .cmx files > File Changes >=20 > M Makefile (2) > M asmcomp/closure.ml = (2) > M asmcomp/compilenv.ml = (24) > M ocamldoc/Makefile = (2) > M typing/cmi_format.ml = (4) > M typing/cmi_format.mli = (4) > M typing/cmt_format.ml = (9) > M typing/env.ml = (33) > M typing/env.mli = (3) > M utils/warnings.ml = (6) > M utils/warnings.mli = (1) > Patch Links: >=20 > https://github.com/ocaml/ocaml/pull/319.patch = > https://github.com/ocaml/ocaml/pull/319.diff = > =E2=80=94 > Reply to this email directly or view it on GitHub = . >=20 --Apple-Mail=_EB35AE0E-38E6-4EED-B8C0-3C434CF2B304 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 The cool features in OCaml 4.03 are adding up -- in addition = to the low latency garbage collection patches, this one ensures that all = of the .cmx files are always available during linking.  If they are = not, then cross-module inlining is currently silently turned off, but = with this, we can ensure the highest performance unikernel link.

Anil


Begin forwarded message:

From: = Leo White <notifications@github.com>
Date: = 29 November 2015 at 18:29:09 = GMT
To: = ocaml/ocaml <ocaml@noreply.github.com>
Subject: = [ocaml] Warning = for missing .cmx files (#319)

This patch adds a warning for = missing cmx files during cross-module inlining. This is useful because = currently a misspecified build can silently damage the performance of = programs.

The patch also extends the -opaque option to work on .mli files. Using -opaque on an .ml file means that its implementation = should not be considered for cross-module inlining. Using -opaque on an .mli file means that no implementation = of that interface should be considered for cross-module inlining.

If an interface is marked as opaque = then the compiler does not search for a .cmx file, and so the new = warning will not be triggered. This means that modules which are = intended to be chosen at link-time (and so deliberately hide .cmx files) = can avoid unnecessarily triggering the warning.

As an = illustration of the utility of this new warning, not all cmx files were = installed by the OCaml distribution, and the patch also adjusts the = installation rules to install these files (which were in compiler-libs = and ocamldoc).

You can view, comment on, or merge this pull request = online at:

  https://github.com/ocaml/ocaml/pull/319

Commit Summary

  • Add warning for missing .cmx files
  • Install compiler libs .cmx files
  • Install ocamldoc .cmx files

File Changes

Patch Links:

=E2=80=94
Reply to this email directly or view it on = GitHub.3D""


= --Apple-Mail=_EB35AE0E-38E6-4EED-B8C0-3C434CF2B304-- --===============8091904016104413640== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============8091904016104413640==-- From mirageos-devel-bounces@lists.xenproject.org Tue Jan 05 14:32:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 05 Jan 2016 14:32:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGSef-0000M7-Hh; Tue, 05 Jan 2016 14:32:09 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGSee-0000Lz-EX for mirageos-devel@lists.xenproject.org; Tue, 05 Jan 2016 14:32:08 +0000 Received: from [85.158.137.68] by server-16.bemta-3.messagelabs.com id AE/64-07451-7E3DB865; Tue, 05 Jan 2016 14:32:07 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-4.tower-31.messagelabs.com!1452004325!4456896!1 X-Originating-IP: [209.85.213.46] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 62318 invoked from network); 5 Jan 2016 14:32:06 -0000 Received: from mail-vk0-f46.google.com (HELO mail-vk0-f46.google.com) (209.85.213.46) by server-4.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 5 Jan 2016 14:32:06 -0000 Received: by mail-vk0-f46.google.com with SMTP id f2so227917668vkb.3 for ; Tue, 05 Jan 2016 06:32:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=GOCjH3N4rcSgU/dS2+Vfy035bCgVcOfMo+3kx2DjDVM=; b=LbKZGJduT/tt2giRoyQVc53YoGQ2KL0t8uyUD7/zoK2zBCmZApjc75ffPlz/UubiWX j3d1tmZMAhB1gpc7kC66MqdqGiJ7K3WG0P36MCjWg0mc+7YnrW69TwwratlGSCYBVZRn Lkcj/YUZjU7KLDNy8lwKDk2h+oAK52d/ethy5ttpvmwtfRg5+ypfB575liCCPz5/WsqB 1oeXx+JkKQraouyvm78kuUvxyOYKJwYJvXRDY6EddgK9NOz3OwmGW5JnGSmZv1BDlZD2 PR+968NF2rqv+NHy0yc8rUQ2ds/xS2mN4I7HjTdGYD26oP6Cnteh6Pj8nsFgB9JQ/kGz 8DPg== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr66348959vki.41.1452004325320; Tue, 05 Jan 2016 06:32:05 -0800 (PST) Received: by 10.31.128.84 with HTTP; Tue, 5 Jan 2016 06:32:05 -0800 (PST) Date: Tue, 5 Jan 2016 14:32:05 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] mirage-qubes 0.1 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org I've made a 0.1 release of mirage-qubes, a Mirage library for writing unikernels to run under QubesOS: https://github.com/talex5/mirage-qubes There's simple skeleton unikernel using it here: https://github.com/talex5/qubes-mirage-skeleton And a larger one here: https://github.com/talex5/qubes-mirage-firewall They all use the Logs library, which means they only support OCaml >= 4.02 at the moment. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 05 14:32:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 05 Jan 2016 14:32:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGSef-0000M7-Hh; Tue, 05 Jan 2016 14:32:09 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aGSee-0000Lz-EX for mirageos-devel@lists.xenproject.org; Tue, 05 Jan 2016 14:32:08 +0000 Received: from [85.158.137.68] by server-16.bemta-3.messagelabs.com id AE/64-07451-7E3DB865; Tue, 05 Jan 2016 14:32:07 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-4.tower-31.messagelabs.com!1452004325!4456896!1 X-Originating-IP: [209.85.213.46] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 62318 invoked from network); 5 Jan 2016 14:32:06 -0000 Received: from mail-vk0-f46.google.com (HELO mail-vk0-f46.google.com) (209.85.213.46) by server-4.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 5 Jan 2016 14:32:06 -0000 Received: by mail-vk0-f46.google.com with SMTP id f2so227917668vkb.3 for ; Tue, 05 Jan 2016 06:32:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=GOCjH3N4rcSgU/dS2+Vfy035bCgVcOfMo+3kx2DjDVM=; b=LbKZGJduT/tt2giRoyQVc53YoGQ2KL0t8uyUD7/zoK2zBCmZApjc75ffPlz/UubiWX j3d1tmZMAhB1gpc7kC66MqdqGiJ7K3WG0P36MCjWg0mc+7YnrW69TwwratlGSCYBVZRn Lkcj/YUZjU7KLDNy8lwKDk2h+oAK52d/ethy5ttpvmwtfRg5+ypfB575liCCPz5/WsqB 1oeXx+JkKQraouyvm78kuUvxyOYKJwYJvXRDY6EddgK9NOz3OwmGW5JnGSmZv1BDlZD2 PR+968NF2rqv+NHy0yc8rUQ2ds/xS2mN4I7HjTdGYD26oP6Cnteh6Pj8nsFgB9JQ/kGz 8DPg== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr66348959vki.41.1452004325320; Tue, 05 Jan 2016 06:32:05 -0800 (PST) Received: by 10.31.128.84 with HTTP; Tue, 5 Jan 2016 06:32:05 -0800 (PST) Date: Tue, 5 Jan 2016 14:32:05 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] mirage-qubes 0.1 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org I've made a 0.1 release of mirage-qubes, a Mirage library for writing unikernels to run under QubesOS: https://github.com/talex5/mirage-qubes There's simple skeleton unikernel using it here: https://github.com/talex5/qubes-mirage-skeleton And a larger one here: https://github.com/talex5/qubes-mirage-firewall They all use the Logs library, which means they only support OCaml >= 4.02 at the moment. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 07 12:14:27 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 07 Jan 2016 12:14:27 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aH9SM-00041g-4Q; Thu, 07 Jan 2016 12:14:18 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aH9SK-00041b-Nq for mirageos-devel@lists.xenproject.org; Thu, 07 Jan 2016 12:14:16 +0000 Received: from [193.109.254.147] by server-4.bemta-14.messagelabs.com id 36/07-10715-8965E865; Thu, 07 Jan 2016 12:14:16 +0000 X-Env-Sender: amc79@cam.ac.uk X-Msg-Ref: server-12.tower-27.messagelabs.com!1452168493!15224002!1 X-Originating-IP: [131.111.8.133] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 23206 invoked from network); 7 Jan 2016 12:08:13 -0000 Received: from ppsw-33.csi.cam.ac.uk (HELO ppsw-33.csi.cam.ac.uk) (131.111.8.133) by server-12.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 7 Jan 2016 12:08:13 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from cpc91232-cmbg18-2-0-cust222.5-4.cable.virginm.net ([82.2.124.223]:46170 helo=[10.0.1.8]) by ppsw-33.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.157]:25) with esmtpsa (PLAIN:amc79) (TLSv1:ECDHE-RSA-AES256-SHA:256) id 1aH9MS-000L83-iV (Exim 4.86_36-e07b163) for mirageos-devel@lists.xenproject.org (return-path ); Thu, 07 Jan 2016 12:08:12 +0000 From: Amir Chaudhry Message-Id: Date: Thu, 7 Jan 2016 12:08:12 +0000 To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) X-Mailer: Apple Mail (2.2104) Subject: [MirageOS-devel] Unikernel.org forum and a logo for unikernels! X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org SGkgZm9sa3MsCgpJIGhvcGUgZXZlcnlvbmUgaGFkIGEgZ3JlYXQgbmV3IHllYXIhCgpJJ2QgbGlr ZSB0byB0ZWxsIHlvdSBhYm91dCB0d28gdGhpbmdzIEknbSB3b3JraW5nIG9uIGFuZCBnZXQgc29t ZSBmZWVkYmFjay4gIFRoZSBmaXJzdCBpcyB1bmlrZXJuZWwub3JnIGFuZCB0aGUgc2Vjb25kIGlz IGEgbG9nbyBmb3IgdW5pa2VybmVscy4KCiMjIyBVbmlrZXJuZWwub3JnICMjIwoKU29tZSBvZiB5 b3UgbWF5IGhhdmUgbm90aWNlZCBhIG5ldyBzaXRlIGNhbGxlZCB1bmlrZXJuZWwub3JnLiAgVGhp cyBpcyBpbnRlbmRlZCB0byBiZSBhIGdhdGhlcmluZyBwbGFjZSBmb3IgZGV2ZWxvcG1lbnQgb24g dW5pa2VybmVscyBhbmQgaGVscCB1cyBlYXNlIHRoZSBwcm9jZXNzIG9mIGJyaW5naW5nIGluIG5l dyB1c2VycyBhbmQgY29udHJpYnV0b3JzIGFjcm9zcyBhbGwgdGhlIHByb2plY3RzLgoKQXMgcGFy dCBvZiB0aGlzLCB0aGVyZSdzIG5vdyBhIG5ldyBkaXNjdXNzaW9uIGZvcnVtIGF0IGh0dHBzOi8v ZGV2ZWwudW5pa2VybmVsLm9yZy4gVGhpcyBzaG91bGQgKmF1Z21lbnQqIHRoZSBleGlzdGluZyBz b3VyY2VzIGFuZCBoZWxwIGZhY2lsaXRhdGUgbW9yZSBjcm9zcy1wb2xsaW5hdGlvbiBhbmQgY29v cGVyYXRpb24gYWNyb3NzIHVuaWtlcm5lbCBwcm9qZWN0cy4gSW4gcGFydGljdWxhciwgd2Ugd2ls bCBhbGwgYmVuZWZpdCBieSB3b3JraW5nIHRvZ2V0aGVyIHRvIHNvbHZlIGNvbW1vbiBwcm9ibGVt cyBhcm91bmQgY29uZmlndXJhdGlvbiwgZGVwbG95bWVudCBhbmQgbW9uaXRvcmluZy4KCllvdSBj YW4gY2F0Y2h1cCBvbiB0aGUgZGlzY3Vzc2lvbiB0aGF0IGxlZCB0byB0aGUgZm9ydW0gWzFdIGFu ZCBhbHNvIHNoYXJlIGZlZWRiYWNrIGFib3V0IHRoZSBzaXRlIGluIGdlbmVyYWwgWzJdLgoKCiMj IyBMb2dvIGZvciB1bmlrZXJuZWxzICMjIwoKSSd2ZSBhbHNvIGJlZW4gd29ya2luZyB0b3dhcmRz IGEgbG9nbyBmb3IgdW5pa2VybmVscyBhbmQgSSdkIGxpa2UgdG8gZ2F0aGVyIGZlZWRiYWNrIGZy b20gdGhlIHVuaWtlcm5lbCBjb21tdW5pdHkhIFRoZXJlJ3MgYmVlbiBhIDk5ZGVzaWducyBjb250 ZXN0IHJ1bm5pbmcgZm9yIGEgd2hpbGUg4oCUIHdoZXJlIGRlc2lnbmVycyBoYXZlIHN1Ym1pdHRl ZCBqdXN0IG92ZXIgNDAwIGVudHJpZXMg4oCUIGFuZCBhIHNob3J0LWxpc3QgZm9yIGNvbW11bml0 eSBmZWVkYmFjayBpcyBub3cgYXQgaHR0cHM6Ly85OWRlc2lnbnMuY28udWsvbG9nby1kZXNpZ24v dm90ZS05OWdqeWkgKGxpbmsgb3BlbiB1bnRpbCBhdCBsZWFzdCAxNXRoIEphbikuCgpUaGUgcmVh c29uIGZvciBjcmVhdGluZyBhIGxvZ28gaXMgdGhhdCB0aGUgdW5pa2VybmVsIGFwcHJvYWNoIGFz IGEgKmNvbmNlcHQqIGhhcyBiZWVuIGdldHRpbmcgbXVjaCBtb3JlIGF0dGVudGlvbiBhbmQgYnkg YnVpbGRpbmcgbW9yZSBvZiBicmFuZCBhcm91bmQgaXQgd2UgY2FuIGdyZWF0bHkgaW1wcm92ZSB0 aGUgc3RhbmRpbmcgb2YgcHJvamVjdHMgYW5kIGluY3JlYXNlIGFkb3B0aW9uIQoKQXQgdGhpcyBz dGFnZSwgdGhlIGFpbSBpcyB0byBnYXRoZXIgd2lkZXIgZmVlZGJhY2sgdG8gaW5mb3JtIHRoZSBu ZXh0IHN0ZXAuICBUaGUgZmluYWwgZGVzaWduIHdpbGwgYmUgc2VsZWN0ZWQgKmF0IGEgbGF0ZXIg ZGF0ZSog4oCUIGFmdGVyIGZ1cnRoZXIgaXRlcmF0aW9uIHdpdGggZGVzaWduZXJzLiAgT25jZSBh IGxvZ28gaXMgY2hvc2VuLCBpdCB3aWxsIGJlIHVzZWQgb24gdW5pa2VybmVsLm9yZyBhbmQgd2ls bCBoZWxwIGluZm9ybSB0aGUgZGVzaWduIG9mIHRoZSByZXN0IG9mIHRoZSBzaXRlLgoKRm9yIG1v cmUgYmFja2dyb3VuZCwgeW91IGNhbiBqb2luIHRoZSBkaXNjdXNzaW9uIHRocmVhZCBbM10sIHJl YWQgdGhlIGRlc2lnbiBicmllZiBbNF0gYW5kIGxvb2sgdGhyb3VnaCBhbGwgdGhlIGVudHJpZXMg WzVdLiBEb24ndCBmb3JnZXQgdG8gbGVhdmUgZmVlZGJhY2sgWzZdIQoKMjAxNiB3aWxsIGJlIGFu IGV4Y2l0aW5nIHllYXIgZm9yIGFsbCB0aGUgdW5pa2VybmVsIHByb2plY3RzIGFuZCBJIGxvb2sg Zm9yd2FyZCB0byBnZXR0aW5nIHN0YXJ0ZWQhCgoqKkxpbmtzKioKCi0tIHVuaWtlcm5lbC5vcmcg LS0gIApbMV0gRGlzY291cnNlIGZvcnVtOiBodHRwczovL2dpdGh1Yi5jb20vVW5pa2VybmVsLVN5 c3RlbXMvdW5pa2VybmVsLm9yZy9pc3N1ZXMvMjUgIApbMl0gV2h5IHVuaWtlcm5lbC5vcmc6IGh0 dHBzOi8vZGV2ZWwudW5pa2VybmVsLm9yZy90L3doeS13ZS1uZWVkLXVuaWtlcm5lbC1vcmcvMTgK Ci0tIExvZ28gY29udGVzdCAtLSAgClszXSBMb2dvIGRpc2N1c3Npb246IGh0dHBzOi8vZGV2ZWwu dW5pa2VybmVsLm9yZy90L2EtbG9nby1mb3ItdW5pa2VybmVscy80NwpbNF0gTG9nbyBkZXNpZ24g YnJpZWY6IGh0dHBzOi8vOTlkZXNpZ25zLmNvLnVrL2xvZ28tZGVzaWduL2NvbnRlc3RzL21ha2Ut ZnVuLWxvZ28tb3Blbi1zb3VyY2UtdW5pa2VybmVsLXByb2plY3RzLTU2MjYxMi9icmllZiAgCls1 XSBBbGwgbG9nbyBlbnRyaWVzOiBodHRwczovLzk5ZGVzaWducy5jby51ay9sb2dvLWRlc2lnbi9j b250ZXN0cy9tYWtlLWZ1bi1sb2dvLW9wZW4tc291cmNlLXVuaWtlcm5lbC1wcm9qZWN0cy01NjI2 MTIvZW50cmllcyAgCls2XSBMb2dvIHNob3J0LWxpc3Q6IGh0dHBzOi8vOTlkZXNpZ25zLmNvLnVr L2xvZ28tZGVzaWduL3ZvdGUtOTlnanlpCgpCZXN0IHdpc2hlcywKQW1pcgoKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1MtZGV2ZWwgbWFpbGlu ZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHA6Ly9saXN0cy54 ZW5wcm9qZWN0Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlzdGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Thu Jan 07 12:14:27 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 07 Jan 2016 12:14:27 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aH9SM-00041g-4Q; 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Thu, 07 Jan 2016 12:08:12 +0000 From: Amir Chaudhry Message-Id: Date: Thu, 7 Jan 2016 12:08:12 +0000 To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) X-Mailer: Apple Mail (2.2104) Subject: [MirageOS-devel] Unikernel.org forum and a logo for unikernels! X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org SGkgZm9sa3MsCgpJIGhvcGUgZXZlcnlvbmUgaGFkIGEgZ3JlYXQgbmV3IHllYXIhCgpJJ2QgbGlr ZSB0byB0ZWxsIHlvdSBhYm91dCB0d28gdGhpbmdzIEknbSB3b3JraW5nIG9uIGFuZCBnZXQgc29t ZSBmZWVkYmFjay4gIFRoZSBmaXJzdCBpcyB1bmlrZXJuZWwub3JnIGFuZCB0aGUgc2Vjb25kIGlz IGEgbG9nbyBmb3IgdW5pa2VybmVscy4KCiMjIyBVbmlrZXJuZWwub3JnICMjIwoKU29tZSBvZiB5 b3UgbWF5IGhhdmUgbm90aWNlZCBhIG5ldyBzaXRlIGNhbGxlZCB1bmlrZXJuZWwub3JnLiAgVGhp cyBpcyBpbnRlbmRlZCB0byBiZSBhIGdhdGhlcmluZyBwbGFjZSBmb3IgZGV2ZWxvcG1lbnQgb24g dW5pa2VybmVscyBhbmQgaGVscCB1cyBlYXNlIHRoZSBwcm9jZXNzIG9mIGJyaW5naW5nIGluIG5l dyB1c2VycyBhbmQgY29udHJpYnV0b3JzIGFjcm9zcyBhbGwgdGhlIHByb2plY3RzLgoKQXMgcGFy dCBvZiB0aGlzLCB0aGVyZSdzIG5vdyBhIG5ldyBkaXNjdXNzaW9uIGZvcnVtIGF0IGh0dHBzOi8v ZGV2ZWwudW5pa2VybmVsLm9yZy4gVGhpcyBzaG91bGQgKmF1Z21lbnQqIHRoZSBleGlzdGluZyBz b3VyY2VzIGFuZCBoZWxwIGZhY2lsaXRhdGUgbW9yZSBjcm9zcy1wb2xsaW5hdGlvbiBhbmQgY29v cGVyYXRpb24gYWNyb3NzIHVuaWtlcm5lbCBwcm9qZWN0cy4gSW4gcGFydGljdWxhciwgd2Ugd2ls bCBhbGwgYmVuZWZpdCBieSB3b3JraW5nIHRvZ2V0aGVyIHRvIHNvbHZlIGNvbW1vbiBwcm9ibGVt cyBhcm91bmQgY29uZmlndXJhdGlvbiwgZGVwbG95bWVudCBhbmQgbW9uaXRvcmluZy4KCllvdSBj YW4gY2F0Y2h1cCBvbiB0aGUgZGlzY3Vzc2lvbiB0aGF0IGxlZCB0byB0aGUgZm9ydW0gWzFdIGFu ZCBhbHNvIHNoYXJlIGZlZWRiYWNrIGFib3V0IHRoZSBzaXRlIGluIGdlbmVyYWwgWzJdLgoKCiMj IyBMb2dvIGZvciB1bmlrZXJuZWxzICMjIwoKSSd2ZSBhbHNvIGJlZW4gd29ya2luZyB0b3dhcmRz IGEgbG9nbyBmb3IgdW5pa2VybmVscyBhbmQgSSdkIGxpa2UgdG8gZ2F0aGVyIGZlZWRiYWNrIGZy b20gdGhlIHVuaWtlcm5lbCBjb21tdW5pdHkhIFRoZXJlJ3MgYmVlbiBhIDk5ZGVzaWducyBjb250 ZXN0IHJ1bm5pbmcgZm9yIGEgd2hpbGUg4oCUIHdoZXJlIGRlc2lnbmVycyBoYXZlIHN1Ym1pdHRl ZCBqdXN0IG92ZXIgNDAwIGVudHJpZXMg4oCUIGFuZCBhIHNob3J0LWxpc3QgZm9yIGNvbW11bml0 eSBmZWVkYmFjayBpcyBub3cgYXQgaHR0cHM6Ly85OWRlc2lnbnMuY28udWsvbG9nby1kZXNpZ24v dm90ZS05OWdqeWkgKGxpbmsgb3BlbiB1bnRpbCBhdCBsZWFzdCAxNXRoIEphbikuCgpUaGUgcmVh c29uIGZvciBjcmVhdGluZyBhIGxvZ28gaXMgdGhhdCB0aGUgdW5pa2VybmVsIGFwcHJvYWNoIGFz IGEgKmNvbmNlcHQqIGhhcyBiZWVuIGdldHRpbmcgbXVjaCBtb3JlIGF0dGVudGlvbiBhbmQgYnkg YnVpbGRpbmcgbW9yZSBvZiBicmFuZCBhcm91bmQgaXQgd2UgY2FuIGdyZWF0bHkgaW1wcm92ZSB0 aGUgc3RhbmRpbmcgb2YgcHJvamVjdHMgYW5kIGluY3JlYXNlIGFkb3B0aW9uIQoKQXQgdGhpcyBz dGFnZSwgdGhlIGFpbSBpcyB0byBnYXRoZXIgd2lkZXIgZmVlZGJhY2sgdG8gaW5mb3JtIHRoZSBu ZXh0IHN0ZXAuICBUaGUgZmluYWwgZGVzaWduIHdpbGwgYmUgc2VsZWN0ZWQgKmF0IGEgbGF0ZXIg ZGF0ZSog4oCUIGFmdGVyIGZ1cnRoZXIgaXRlcmF0aW9uIHdpdGggZGVzaWduZXJzLiAgT25jZSBh IGxvZ28gaXMgY2hvc2VuLCBpdCB3aWxsIGJlIHVzZWQgb24gdW5pa2VybmVsLm9yZyBhbmQgd2ls bCBoZWxwIGluZm9ybSB0aGUgZGVzaWduIG9mIHRoZSByZXN0IG9mIHRoZSBzaXRlLgoKRm9yIG1v cmUgYmFja2dyb3VuZCwgeW91IGNhbiBqb2luIHRoZSBkaXNjdXNzaW9uIHRocmVhZCBbM10sIHJl YWQgdGhlIGRlc2lnbiBicmllZiBbNF0gYW5kIGxvb2sgdGhyb3VnaCBhbGwgdGhlIGVudHJpZXMg WzVdLiBEb24ndCBmb3JnZXQgdG8gbGVhdmUgZmVlZGJhY2sgWzZdIQoKMjAxNiB3aWxsIGJlIGFu IGV4Y2l0aW5nIHllYXIgZm9yIGFsbCB0aGUgdW5pa2VybmVsIHByb2plY3RzIGFuZCBJIGxvb2sg Zm9yd2FyZCB0byBnZXR0aW5nIHN0YXJ0ZWQhCgoqKkxpbmtzKioKCi0tIHVuaWtlcm5lbC5vcmcg LS0gIApbMV0gRGlzY291cnNlIGZvcnVtOiBodHRwczovL2dpdGh1Yi5jb20vVW5pa2VybmVsLVN5 c3RlbXMvdW5pa2VybmVsLm9yZy9pc3N1ZXMvMjUgIApbMl0gV2h5IHVuaWtlcm5lbC5vcmc6IGh0 dHBzOi8vZGV2ZWwudW5pa2VybmVsLm9yZy90L3doeS13ZS1uZWVkLXVuaWtlcm5lbC1vcmcvMTgK Ci0tIExvZ28gY29udGVzdCAtLSAgClszXSBMb2dvIGRpc2N1c3Npb246IGh0dHBzOi8vZGV2ZWwu dW5pa2VybmVsLm9yZy90L2EtbG9nby1mb3ItdW5pa2VybmVscy80NwpbNF0gTG9nbyBkZXNpZ24g YnJpZWY6IGh0dHBzOi8vOTlkZXNpZ25zLmNvLnVrL2xvZ28tZGVzaWduL2NvbnRlc3RzL21ha2Ut ZnVuLWxvZ28tb3Blbi1zb3VyY2UtdW5pa2VybmVsLXByb2plY3RzLTU2MjYxMi9icmllZiAgCls1 XSBBbGwgbG9nbyBlbnRyaWVzOiBodHRwczovLzk5ZGVzaWducy5jby51ay9sb2dvLWRlc2lnbi9j b250ZXN0cy9tYWtlLWZ1bi1sb2dvLW9wZW4tc291cmNlLXVuaWtlcm5lbC1wcm9qZWN0cy01NjI2 MTIvZW50cmllcyAgCls2XSBMb2dvIHNob3J0LWxpc3Q6IGh0dHBzOi8vOTlkZXNpZ25zLmNvLnVr L2xvZ28tZGVzaWduL3ZvdGUtOTlnanlpCgpCZXN0IHdpc2hlcywKQW1pcgoKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1MtZGV2ZWwgbWFpbGlu ZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHA6Ly9saXN0cy54 ZW5wcm9qZWN0Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlzdGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Thu Jan 07 21:57:42 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 07 Jan 2016 21:57:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHIYn-0000Kh-NW; 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Thu, 7 Jan 2016 21:57:28 +0000 (UTC) Date: Thu, 7 Jan 2016 22:57:25 +0100 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: OCaml List , "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Message-ID: <6E4D5FC9200B4A0B8A4F4F20AD6D44D0@erratique.ch> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: =?utf-8?Q?T=C3=B6r=C3=B6k_Edwin?= Subject: [MirageOS-devel] [ANN] Logs 0.5.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org SGVsbG8sICAKCkknZCBsaWtlIHRvIGFubm91bmNlIExvZ3MgMC41LjAgYW4gaW5jb21wYXRpYmxl IHJlbGVhc2Ugb2YgTG9ncy4gU2VlIHRoZSByZWxlYXNlIG5vdGVzIGZvciBkZXRhaWxzOiAgCgog IGh0dHBzOi8vZ2l0aHViLmNvbS9kYnVlbnpsaS9sb2dzL2Jsb2IvdjAuNS4wL0NIQU5HRVMubWQK CkxvZ3MgcHJvdmlkZXMgYSBsb2dnaW5nIGluZnJhc3RydWN0dXJlIGZvciBPQ2FtbApIb21lcGFn ZTogaHR0cDovL2VycmF0aXF1ZS5jaC9zb2Z0d2FyZS9sb2dzICAKQVBJIGRvY3M6IGh0dHA6Ly9l cnJhdGlxdWUuY2gvc29mdHdhcmUvbG9ncy9kb2MvCgpNYW55IHRoYW5rcyB0byBFZHdpbiBUw7Zy w7ZrIGZvciBoaXMgZ29vZCBzdWdnZXN0aW9ucy4gIAoKQmVzdCwgIAoKRGFuaWVsCgoKCgoKCgoK CgoKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpNaXJh Z2VPUy1kZXZlbCBtYWlsaW5nIGxpc3QKTWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5v cmcKaHR0cDovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5mby9t aXJhZ2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Thu Jan 07 21:57:42 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 07 Jan 2016 21:57:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHIYn-0000Kh-NW; 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Thu, 7 Jan 2016 21:57:28 +0000 (UTC) Date: Thu, 7 Jan 2016 22:57:25 +0100 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: OCaml List , "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Message-ID: <6E4D5FC9200B4A0B8A4F4F20AD6D44D0@erratique.ch> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: =?utf-8?Q?T=C3=B6r=C3=B6k_Edwin?= Subject: [MirageOS-devel] [ANN] Logs 0.5.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org SGVsbG8sICAKCkknZCBsaWtlIHRvIGFubm91bmNlIExvZ3MgMC41LjAgYW4gaW5jb21wYXRpYmxl IHJlbGVhc2Ugb2YgTG9ncy4gU2VlIHRoZSByZWxlYXNlIG5vdGVzIGZvciBkZXRhaWxzOiAgCgog IGh0dHBzOi8vZ2l0aHViLmNvbS9kYnVlbnpsaS9sb2dzL2Jsb2IvdjAuNS4wL0NIQU5HRVMubWQK CkxvZ3MgcHJvdmlkZXMgYSBsb2dnaW5nIGluZnJhc3RydWN0dXJlIGZvciBPQ2FtbApIb21lcGFn ZTogaHR0cDovL2VycmF0aXF1ZS5jaC9zb2Z0d2FyZS9sb2dzICAKQVBJIGRvY3M6IGh0dHA6Ly9l cnJhdGlxdWUuY2gvc29mdHdhcmUvbG9ncy9kb2MvCgpNYW55IHRoYW5rcyB0byBFZHdpbiBUw7Zy w7ZrIGZvciBoaXMgZ29vZCBzdWdnZXN0aW9ucy4gIAoKQmVzdCwgIAoKRGFuaWVsCgoKCgoKCgoK CgoKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpNaXJh Z2VPUy1kZXZlbCBtYWlsaW5nIGxpc3QKTWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5v cmcKaHR0cDovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5mby9t aXJhZ2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Thu Jan 07 22:26:35 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 07 Jan 2016 22:26:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHJ0p-0001WC-UA; 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Thu, 7 Jan 2016 22:26:24 +0000 (UTC) Date: Thu, 7 Jan 2016 23:26:22 +0100 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Malcolm Matalka Message-ID: In-Reply-To: References: <9FD64A9BC7C04CE0815129733504EE2E@erratique.ch> <864mfyuowr.fsf@gmail.com> <28842B11CF15444B87C434125E84684F@erratique.ch> <49465B43C5554C629CFD4D2B115B6FDD@erratique.ch> <86r3j2t6y1.fsf@gmail.com> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: Drup , Jeremy Yallop , OCaml List , "=?utf-8?Q?mirageos-devel=5C=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] [Caml-list] [ANN] Logs 0.4.2 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org TGUgdmVuZHJlZGksIDQgZMOpY2VtYnJlIDIwMTUgw6AgMTk6MzAsIERhbmllbCBCw7xuemxpIGEg w6ljcml0IDoKPiBCdXQgaXQgc2hvdWxkIGJlIGFkZGVkIHRoYXQgaXQgbWF5IGJlIHByb2JsZW1h dGljIGlmIHlvdSB3YW50IHRoZSBzeW5jaHJvbm91cyBzZW1hbnRpY3MgYW5kIHlvdSBhcmUgdXNp bmcgbHd0Lgo+ICAKClRoZSByZWNlbnRseSByZWxlYXNlZCBMb2dzIDAuNS4wIGNhbiBub3cgc3Vw cG9ydCB0aGlzIHNjZW5hcmlvLiBJIGFsc28gYWRkZWQgYSBub3RlIGluIHRoZSBkb2N1bWVudGF0 aW9uIHRvIHRyeSB0byBjbGFyaWZ5IHRoZXNlIGlzc3VlczogIAoKICBodHRwOi8vZXJyYXRpcXVl LmNoL3NvZnR3YXJlL2xvZ3MvZG9jL0xvZ3MuaHRtbCNzeW5jCgpCZXN0LCAgCgpEYW5pZWwKCgoK Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1pcmFnZU9T LWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpo dHRwOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Thu Jan 07 22:26:35 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 07 Jan 2016 22:26:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHJ0p-0001WC-UA; 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Thu, 7 Jan 2016 22:26:24 +0000 (UTC) Date: Thu, 7 Jan 2016 23:26:22 +0100 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Malcolm Matalka Message-ID: In-Reply-To: References: <9FD64A9BC7C04CE0815129733504EE2E@erratique.ch> <864mfyuowr.fsf@gmail.com> <28842B11CF15444B87C434125E84684F@erratique.ch> <49465B43C5554C629CFD4D2B115B6FDD@erratique.ch> <86r3j2t6y1.fsf@gmail.com> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: Drup , Jeremy Yallop , OCaml List , "=?utf-8?Q?mirageos-devel=5C=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] [Caml-list] [ANN] Logs 0.4.2 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org TGUgdmVuZHJlZGksIDQgZMOpY2VtYnJlIDIwMTUgw6AgMTk6MzAsIERhbmllbCBCw7xuemxpIGEg w6ljcml0IDoKPiBCdXQgaXQgc2hvdWxkIGJlIGFkZGVkIHRoYXQgaXQgbWF5IGJlIHByb2JsZW1h dGljIGlmIHlvdSB3YW50IHRoZSBzeW5jaHJvbm91cyBzZW1hbnRpY3MgYW5kIHlvdSBhcmUgdXNp bmcgbHd0Lgo+ICAKClRoZSByZWNlbnRseSByZWxlYXNlZCBMb2dzIDAuNS4wIGNhbiBub3cgc3Vw cG9ydCB0aGlzIHNjZW5hcmlvLiBJIGFsc28gYWRkZWQgYSBub3RlIGluIHRoZSBkb2N1bWVudGF0 aW9uIHRvIHRyeSB0byBjbGFyaWZ5IHRoZXNlIGlzc3VlczogIAoKICBodHRwOi8vZXJyYXRpcXVl LmNoL3NvZnR3YXJlL2xvZ3MvZG9jL0xvZ3MuaHRtbCNzeW5jCgpCZXN0LCAgCgpEYW5pZWwKCgoK Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1pcmFnZU9T LWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpo dHRwOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Fri Jan 08 11:20:28 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 08 Jan 2016 11:20:28 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHV5e-0000yD-IA; 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[209.85.213.50]) by smtp.gmail.com with ESMTPSA id x71sm10899470vkx.4.2016.01.08.03.20.13 for (version=TLSv1/SSLv3 cipher=OTHER); Fri, 08 Jan 2016 03:20:14 -0800 (PST) Received: by mail-vk0-f50.google.com with SMTP id k1so189823455vkb.2 for ; Fri, 08 Jan 2016 03:20:13 -0800 (PST) X-Received: by 10.31.9.72 with SMTP id 69mr78766886vkj.123.1452252013792; Fri, 08 Jan 2016 03:20:13 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Fri, 8 Jan 2016 03:19:54 -0800 (PST) From: Tim Cuthbertson Date: Fri, 8 Jan 2016 22:19:54 +1100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. There is sadly no `safepass-xen` package, and trying to just use `safepass` results in link errors: <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `BF_crypt': (.text+0x1b97): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `BF_crypt': (.text+0x2112): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `_crypt_blowfish_rn': (.text+0x21ea): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `_crypt_gensalt_blowfish_rn': (.text+0x2575): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `_crypt_gensalt_blowfish_rn': (.text+0x25a6): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): more undefined references to `__errno_location' follow I'm assuming I'd need to customise the build process tp produce an appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble is twofold: - I don't really know what the thing I'm doing is. Is mirage-xen a different architecture? A different ABI? Do C libraries need to be cross-compiled, or just compiled with particular flags so that they'll work on xen-minios instead of gnu/linux? - The existing scripts seem to be pretty ad-hoc - zarith gets away mainly with particular CFLAGS (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), while gmp looks like a full cross-compilation using `--target` (and then does some other sneaky things). safepass uses OASIS for its build system, which doesn't seem to have any cross-compilation functionality built in as far as I could tell. Can anyone give me pointers on what I'd need to do to safepass' build scripts to get this working in mirage-xen, or at the least some clarification on why it doesn't work as-is and how cross compilation works for C libraries used in mirage-xen? [0]: https://github.com/timbertson/passe Thanks, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 08 11:20:28 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 08 Jan 2016 11:20:28 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHV5e-0000yD-IA; Fri, 08 Jan 2016 11:20:18 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHV5c-0000y8-TW for mirageos-devel@lists.xenproject.org; Fri, 08 Jan 2016 11:20:17 +0000 Received: from [85.158.139.211] by server-5.bemta-5.messagelabs.com id 9F/49-03235-07B9F865; Fri, 08 Jan 2016 11:20:16 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-9.tower-206.messagelabs.com!1452252014!14677073!1 X-Originating-IP: [209.85.213.42] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 60322 invoked from network); 8 Jan 2016 11:20:15 -0000 Received: from mail-vk0-f42.google.com (HELO mail-vk0-f42.google.com) (209.85.213.42) by server-9.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 8 Jan 2016 11:20:15 -0000 Received: by mail-vk0-f42.google.com with SMTP id i129so51762910vkb.0 for ; Fri, 08 Jan 2016 03:20:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to:content-type; bh=Z1AjrPsSj42Q4tXcJGRcfQ/WA0gdvYBxQVQh2zhQVQQ=; b=s5sZ9KmA4+jewnZ1n4teCr+9Mlkb2ltL7ZyUAZ/NZ3dlUx8hcDWSD4GPXDjhI3DmuQ nG8Ai6ISpyWAwWjgArA1+5/PoJ0U+FcgP+fxHeUVQa5Nrqc7PDxJPRgEcliWb5IqMbHl k4DiWmYmAkv1kb9R/Tr+irz1C90+qAl+BuZU8bQHmGH8N/pErxwBqvqxBD3x83tY/z7e uzxiIyc0Tbx8CnR2hmLKqaQs/1pxYldRw4yprsRQATdJjAbZrA2+t/wtcK1JR7lMJXVX rHh86FLUCZmBQH4auSz+ClkIOY4Neo/pMDgxFqXmFE11koBcUBNgnFjYt/bTtNuRt4ht 9iLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:from:date:message-id:subject:to :content-type; bh=Z1AjrPsSj42Q4tXcJGRcfQ/WA0gdvYBxQVQh2zhQVQQ=; b=bghcVsjcJb8cyfBFjQUjXsfYOhLwT+H6Z30icHnDNgxGip0l2Zr3XR6osy5TapOW6L OqserdfsoXWIKoA+RhCicPFLEjJ3aH7sDA1ipTSoDuA9DDwQy8AtjJq9XTBcQEAfqWPZ ltALn//QuHA+9eByfCU2MQq8qX0d40I4HirmBmkSH0VDKeeoiBaQZrc/Wk8MU29bhlY0 HflmSPuAsNFpq1QlhwFadjUeJHoQ7X+ffkkHai2B/S0zoBLZdlcbezRCwdKG6DMMtemi jiBT3CDMc2PCn7QWAbsK6nZnBIYkkh7I9NdmrbTTy19Tb0OChJmnoSq/bBaR25szFtyU rcwQ== X-Gm-Message-State: ALoCoQkx3hV35xmn8xfaajJKXpjKczG7HmAysQS2BfB0Qgmv8eDce6GSnDlzwQn6fOQTa9NEGCHYSVCtJe7f4gVGNfsTVhd47A== X-Received: by 10.31.13.79 with SMTP id 76mr48426517vkn.148.1452252014477; Fri, 08 Jan 2016 03:20:14 -0800 (PST) Received: from mail-vk0-f50.google.com (mail-vk0-f50.google.com. [209.85.213.50]) by smtp.gmail.com with ESMTPSA id x71sm10899470vkx.4.2016.01.08.03.20.13 for (version=TLSv1/SSLv3 cipher=OTHER); Fri, 08 Jan 2016 03:20:14 -0800 (PST) Received: by mail-vk0-f50.google.com with SMTP id k1so189823455vkb.2 for ; Fri, 08 Jan 2016 03:20:13 -0800 (PST) X-Received: by 10.31.9.72 with SMTP id 69mr78766886vkj.123.1452252013792; Fri, 08 Jan 2016 03:20:13 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Fri, 8 Jan 2016 03:19:54 -0800 (PST) From: Tim Cuthbertson Date: Fri, 8 Jan 2016 22:19:54 +1100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. There is sadly no `safepass-xen` package, and trying to just use `safepass` results in link errors: <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `BF_crypt': (.text+0x1b97): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `BF_crypt': (.text+0x2112): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `_crypt_blowfish_rn': (.text+0x21ea): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `_crypt_gensalt_blowfish_rn': (.text+0x2575): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function `_crypt_gensalt_blowfish_rn': (.text+0x25a6): undefined reference to `__errno_location' <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): more undefined references to `__errno_location' follow I'm assuming I'd need to customise the build process tp produce an appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble is twofold: - I don't really know what the thing I'm doing is. Is mirage-xen a different architecture? A different ABI? Do C libraries need to be cross-compiled, or just compiled with particular flags so that they'll work on xen-minios instead of gnu/linux? - The existing scripts seem to be pretty ad-hoc - zarith gets away mainly with particular CFLAGS (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), while gmp looks like a full cross-compilation using `--target` (and then does some other sneaky things). safepass uses OASIS for its build system, which doesn't seem to have any cross-compilation functionality built in as far as I could tell. Can anyone give me pointers on what I'd need to do to safepass' build scripts to get this working in mirage-xen, or at the least some clarification on why it doesn't work as-is and how cross compilation works for C libraries used in mirage-xen? [0]: https://github.com/timbertson/passe Thanks, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 08 12:14:48 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 08 Jan 2016 12:14:48 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHVwM-0003Nv-5l; Fri, 08 Jan 2016 12:14:46 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHVwK-0003Nf-7i for mirageos-devel@lists.xenproject.org; Fri, 08 Jan 2016 12:14:44 +0000 Received: from [193.109.254.147] by server-10.bemta-14.messagelabs.com id 29/25-25438-338AF865; Fri, 08 Jan 2016 12:14:43 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-10.tower-27.messagelabs.com!1452255281!15545747!1 X-Originating-IP: [209.85.213.49] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 29010 invoked from network); 8 Jan 2016 12:14:42 -0000 Received: from mail-vk0-f49.google.com (HELO mail-vk0-f49.google.com) (209.85.213.49) by server-10.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 8 Jan 2016 12:14:42 -0000 Received: by mail-vk0-f49.google.com with SMTP id k1so190442935vkb.2 for ; Fri, 08 Jan 2016 04:14:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=OYU3zoQfLi1wbzq6ADjhhdJBi+Mocnkeltjl1UQCr/4=; b=XAec8J0g/az98McMuGABDYmbKkcdE2q8dI7hyZuPjmz9qVQLLndwPi6FK95d9Do/Wv jqkeKLP3LIE8fnvf0JGXsiICoU5mh+NvfxBX9SL/BmaFbDV0WBrpKhrb3dgvZOLZ+CA/ sL/6BpJoRzRyvbT3qZciky/SUjKMtO0UbgBZQUacTp8RttzUrB2Dw1KZM5uGG5fo+4h5 xd+798Smd6dHr6Lkn3/wFzuJViyCHToPKLKsRYy0pwUs/yyyJfyCUp6K0gEHoPHw6NXT Dq4tUa8NoztRAC1aiSYt6X9s9qWsP3qxsH/VQ740hf4qN2PEYdNxTEaci2wo46X6V211 zfmQ== MIME-Version: 1.0 X-Received: by 10.31.129.11 with SMTP id c11mr71016631vkd.52.1452255281304; Fri, 08 Jan 2016 04:14:41 -0800 (PST) Received: by 10.31.128.84 with HTTP; Fri, 8 Jan 2016 04:14:41 -0800 (PST) In-Reply-To: References: Date: Fri, 8 Jan 2016 12:14:41 +0000 Message-ID: From: Thomas Leonard To: Tim Cuthbertson Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 8 January 2016 at 11:19, Tim Cuthbertson wrote: > I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. > There is sadly no `safepass-xen` package, and trying to just use > `safepass` results in link errors: > > > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `BF_crypt': > (.text+0x1b97): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `BF_crypt': > (.text+0x2112): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `_crypt_blowfish_rn': > (.text+0x21ea): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `_crypt_gensalt_blowfish_rn': > (.text+0x2575): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `_crypt_gensalt_blowfish_rn': > (.text+0x25a6): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): > more undefined references to `__errno_location' follow > > > I'm assuming I'd need to customise the build process tp produce an > appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble > is twofold: > > - I don't really know what the thing I'm doing is. Is mirage-xen a > different architecture? A different ABI? Do C libraries need to be > cross-compiled, or just compiled with particular flags so that they'll > work on xen-minios instead of gnu/linux? C libraries need to be compiled with different headers and flags (in particular, -mno-red-zone). Using libraries compiled for Linux will often appear to work, but may fail when interrupts occur, so the build makes it hard to use them by accident. However, OCaml binaries can be shared (ocamlopt doesn't use a red zone and the OCaml ABI is the same). > - The existing scripts seem to be pretty ad-hoc - zarith gets away > mainly with particular CFLAGS > (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), It's using pkg-config to get the important flags. The others are optimisations (except -fno-builtin, which is either not needed or should be supplied by Mini-OS). > while gmp looks like a full cross-compilation using `--target` (and > then does some other sneaky things). > > safepass uses OASIS for its build system, which doesn't seem to have > any cross-compilation functionality built in as far as I could tell. > Can anyone give me pointers on what I'd need to do to safepass' build > scripts to get this working in mirage-xen, or at the least some > clarification on why it doesn't work as-is and how cross compilation > works for C libraries used in mirage-xen? > > [0]: https://github.com/timbertson/passe The io-page library provides a fairly simple template: https://github.com/mirage/io-page/blob/master/_oasis It builds io_page_unix and io_page_xen libraries. The C flags are added to the main META file with: XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" There's a command to get the Xen flags: PostConfCommand: ocaml postconf.ml The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the Unix one (you need a separate file because OASIS can't compile the same source path with different flags). -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 08 12:14:48 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 08 Jan 2016 12:14:48 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHVwM-0003Nv-5l; Fri, 08 Jan 2016 12:14:46 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHVwK-0003Nf-7i for mirageos-devel@lists.xenproject.org; Fri, 08 Jan 2016 12:14:44 +0000 Received: from [193.109.254.147] by server-10.bemta-14.messagelabs.com id 29/25-25438-338AF865; Fri, 08 Jan 2016 12:14:43 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-10.tower-27.messagelabs.com!1452255281!15545747!1 X-Originating-IP: [209.85.213.49] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 29010 invoked from network); 8 Jan 2016 12:14:42 -0000 Received: from mail-vk0-f49.google.com (HELO mail-vk0-f49.google.com) (209.85.213.49) by server-10.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 8 Jan 2016 12:14:42 -0000 Received: by mail-vk0-f49.google.com with SMTP id k1so190442935vkb.2 for ; Fri, 08 Jan 2016 04:14:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=OYU3zoQfLi1wbzq6ADjhhdJBi+Mocnkeltjl1UQCr/4=; b=XAec8J0g/az98McMuGABDYmbKkcdE2q8dI7hyZuPjmz9qVQLLndwPi6FK95d9Do/Wv jqkeKLP3LIE8fnvf0JGXsiICoU5mh+NvfxBX9SL/BmaFbDV0WBrpKhrb3dgvZOLZ+CA/ sL/6BpJoRzRyvbT3qZciky/SUjKMtO0UbgBZQUacTp8RttzUrB2Dw1KZM5uGG5fo+4h5 xd+798Smd6dHr6Lkn3/wFzuJViyCHToPKLKsRYy0pwUs/yyyJfyCUp6K0gEHoPHw6NXT Dq4tUa8NoztRAC1aiSYt6X9s9qWsP3qxsH/VQ740hf4qN2PEYdNxTEaci2wo46X6V211 zfmQ== MIME-Version: 1.0 X-Received: by 10.31.129.11 with SMTP id c11mr71016631vkd.52.1452255281304; Fri, 08 Jan 2016 04:14:41 -0800 (PST) Received: by 10.31.128.84 with HTTP; Fri, 8 Jan 2016 04:14:41 -0800 (PST) In-Reply-To: References: Date: Fri, 8 Jan 2016 12:14:41 +0000 Message-ID: From: Thomas Leonard To: Tim Cuthbertson Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 8 January 2016 at 11:19, Tim Cuthbertson wrote: > I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. > There is sadly no `safepass-xen` package, and trying to just use > `safepass` results in link errors: > > > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `BF_crypt': > (.text+0x1b97): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `BF_crypt': > (.text+0x2112): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `_crypt_blowfish_rn': > (.text+0x21ea): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `_crypt_gensalt_blowfish_rn': > (.text+0x2575): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function > `_crypt_gensalt_blowfish_rn': > (.text+0x25a6): undefined reference to `__errno_location' > <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): > more undefined references to `__errno_location' follow > > > I'm assuming I'd need to customise the build process tp produce an > appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble > is twofold: > > - I don't really know what the thing I'm doing is. Is mirage-xen a > different architecture? A different ABI? Do C libraries need to be > cross-compiled, or just compiled with particular flags so that they'll > work on xen-minios instead of gnu/linux? C libraries need to be compiled with different headers and flags (in particular, -mno-red-zone). Using libraries compiled for Linux will often appear to work, but may fail when interrupts occur, so the build makes it hard to use them by accident. However, OCaml binaries can be shared (ocamlopt doesn't use a red zone and the OCaml ABI is the same). > - The existing scripts seem to be pretty ad-hoc - zarith gets away > mainly with particular CFLAGS > (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), It's using pkg-config to get the important flags. The others are optimisations (except -fno-builtin, which is either not needed or should be supplied by Mini-OS). > while gmp looks like a full cross-compilation using `--target` (and > then does some other sneaky things). > > safepass uses OASIS for its build system, which doesn't seem to have > any cross-compilation functionality built in as far as I could tell. > Can anyone give me pointers on what I'd need to do to safepass' build > scripts to get this working in mirage-xen, or at the least some > clarification on why it doesn't work as-is and how cross compilation > works for C libraries used in mirage-xen? > > [0]: https://github.com/timbertson/passe The io-page library provides a fairly simple template: https://github.com/mirage/io-page/blob/master/_oasis It builds io_page_unix and io_page_xen libraries. The C flags are added to the main META file with: XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" There's a command to get the Xen flags: PostConfCommand: ocaml postconf.ml The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the Unix one (you need a separate file because OASIS can't compile the same source path with different flags). -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 08 12:18:00 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 08 Jan 2016 12:18:00 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHVzT-0003cS-UV; Fri, 08 Jan 2016 12:17:59 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHVzS-0003cJ-Bs for mirageos-devel@lists.xenproject.org; Fri, 08 Jan 2016 12:17:58 +0000 Received: from [85.158.143.35] by server-3.bemta-4.messagelabs.com id A1/44-31122-5F8AF865; Fri, 08 Jan 2016 12:17:57 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-9.tower-21.messagelabs.com!1452255476!9037110!1 X-Originating-IP: [209.85.213.52] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 19976 invoked from network); 8 Jan 2016 12:17:57 -0000 Received: from mail-vk0-f52.google.com (HELO mail-vk0-f52.google.com) (209.85.213.52) by server-9.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 8 Jan 2016 12:17:57 -0000 Received: by mail-vk0-f52.google.com with SMTP id i129so52424429vkb.0 for ; Fri, 08 Jan 2016 04:17:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=RGxjgh+FfxeZbQAT6+Y1NYRq7eMNrY+IhWFL9BsXDvs=; b=ZWErp9OyOUVkvKGcWt9hrYeE0oDyOmTq9b8rnbRv0vrnhdoK1tyLfTxK55sDoRZVjx tIzbucWHRm7dQXRCuIiY27db0UFnB/Xw5HMbTOjSO9mGZBld7aAQRDM93vLo1+WXIZvH GZn93nDnlCsONpvKuKRivvHN3ug54UMuNDdtVyD/2Skmk3R2LADboYdrWCmWTYEPprn/ Z4pAdQU0LjDhSdQffyLr2BqniBuWLxH4zRrBrys3HbSHRQL6LLgjq0pEs1I6YQXCanlI R4zOEsa8236+tTVuREYE5m0iNifMGFc8DPrrNbp0gZ3gzs77b+cD2AeOMD8UnJfByQPw dGgQ== MIME-Version: 1.0 X-Received: by 10.31.56.18 with SMTP id f18mr68580984vka.19.1452255475983; Fri, 08 Jan 2016 04:17:55 -0800 (PST) Received: by 10.31.128.84 with HTTP; Fri, 8 Jan 2016 04:17:55 -0800 (PST) In-Reply-To: <6E4D5FC9200B4A0B8A4F4F20AD6D44D0@erratique.ch> References: <6E4D5FC9200B4A0B8A4F4F20AD6D44D0@erratique.ch> Date: Fri, 8 Jan 2016 12:17:55 +0000 Message-ID: From: Thomas Leonard To: =?UTF-8?Q?Daniel_B=C3=BCnzli?= Cc: =?UTF-8?B?VMO2csO2ayBFZHdpbg==?= , "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] [ANN] Logs 0.5.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org T24gNyBKYW51YXJ5IDIwMTYgYXQgMjE6NTcsIERhbmllbCBCw7xuemxpIDxkYW5pZWwuYnVlbnps aUBlcnJhdGlxdWUuY2g+IHdyb3RlOgo+IEhlbGxvLAo+Cj4gSSdkIGxpa2UgdG8gYW5ub3VuY2Ug TG9ncyAwLjUuMCBhbiBpbmNvbXBhdGlibGUgcmVsZWFzZSBvZiBMb2dzLiBTZWUgdGhlIHJlbGVh c2Ugbm90ZXMgZm9yIGRldGFpbHM6Cj4KPiAgIGh0dHBzOi8vZ2l0aHViLmNvbS9kYnVlbnpsaS9s b2dzL2Jsb2IvdjAuNS4wL0NIQU5HRVMubWQKPgo+IExvZ3MgcHJvdmlkZXMgYSBsb2dnaW5nIGlu ZnJhc3RydWN0dXJlIGZvciBPQ2FtbAo+IEhvbWVwYWdlOiBodHRwOi8vZXJyYXRpcXVlLmNoL3Nv ZnR3YXJlL2xvZ3MKPiBBUEkgZG9jczogaHR0cDovL2VycmF0aXF1ZS5jaC9zb2Z0d2FyZS9sb2dz L2RvYy8KPgo+IE1hbnkgdGhhbmtzIHRvIEVkd2luIFTDtnLDtmsgZm9yIGhpcyBnb29kIHN1Z2dl c3Rpb25zLgoKSSd2ZSBqdXN0IHVwZGF0ZWQgbWlyYWdlLXF1YmVzIGFuZCBxdWJlcy1taXJhZ2Ut ZmlyZXdhbGwgKGluIEdpdCkgdG8KdGhlIG5ldyBBUEkuIFNlZW1zIHRvIHdvcmsgbmljZWx5LCBh bmQgSSBhZ3JlZSB0aGlzIG1ha2VzIHRoZSBjb2RlCmVhc2llciB0byB1bmRlcnN0YW5kLgoKCi0t IApEciBUaG9tYXMgTGVvbmFyZCAgICAgICAgaHR0cDovL3Jvc2NpZHVzLmNvbS9ibG9nLwpHUEc6 IERBOTggMjVBRSBDQUQwIDg5NzUgN0NEQSAgQkQ4RSAwNzEzIDNGOTYgQ0E3NCBEOEJBCgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpNaXJhZ2VPUy1kZXZl bCBtYWlsaW5nIGxpc3QKTWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cDov L2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5mby9taXJhZ2Vvcy1k ZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Fri Jan 08 12:18:00 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 08 Jan 2016 12:18:00 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aHVzT-0003cS-UV; 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[209.85.213.49]) by smtp.gmail.com with ESMTPSA id c77sm14972631vkf.26.2016.01.10.02.15.33 for (version=TLSv1/SSLv3 cipher=OTHER); Sun, 10 Jan 2016 02:15:34 -0800 (PST) Received: by mail-vk0-f49.google.com with SMTP id k1so211648384vkb.2 for ; Sun, 10 Jan 2016 02:15:33 -0800 (PST) X-Received: by 10.31.6.17 with SMTP id 17mr84402010vkg.75.1452420933595; Sun, 10 Jan 2016 02:15:33 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Sun, 10 Jan 2016 02:15:14 -0800 (PST) In-Reply-To: References: From: Tim Cuthbertson Date: Sun, 10 Jan 2016 21:15:14 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: > On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >> There is sadly no `safepass-xen` package, and trying to just use >> `safepass` results in link errors: >> >> >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `BF_crypt': >> (.text+0x1b97): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `BF_crypt': >> (.text+0x2112): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `_crypt_blowfish_rn': >> (.text+0x21ea): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `_crypt_gensalt_blowfish_rn': >> (.text+0x2575): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `_crypt_gensalt_blowfish_rn': >> (.text+0x25a6): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >> more undefined references to `__errno_location' follow >> >> >> I'm assuming I'd need to customise the build process tp produce an >> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >> is twofold: >> >> - I don't really know what the thing I'm doing is. Is mirage-xen a >> different architecture? A different ABI? Do C libraries need to be >> cross-compiled, or just compiled with particular flags so that they'll >> work on xen-minios instead of gnu/linux? > > C libraries need to be compiled with different headers and flags (in > particular, -mno-red-zone). Using libraries compiled for Linux will > often appear to work, but may fail when interrupts occur, so the build > makes it hard to use them by accident. > > However, OCaml binaries can be shared (ocamlopt doesn't use a red zone > and the OCaml ABI is the same). > >> - The existing scripts seem to be pretty ad-hoc - zarith gets away >> mainly with particular CFLAGS >> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), > > It's using pkg-config to get the important flags. The others are > optimisations (except -fno-builtin, which is either not needed or > should be supplied by Mini-OS). > >> while gmp looks like a full cross-compilation using `--target` (and >> then does some other sneaky things). >> >> safepass uses OASIS for its build system, which doesn't seem to have >> any cross-compilation functionality built in as far as I could tell. >> Can anyone give me pointers on what I'd need to do to safepass' build >> scripts to get this working in mirage-xen, or at the least some >> clarification on why it doesn't work as-is and how cross compilation >> works for C libraries used in mirage-xen? >> >> [0]: https://github.com/timbertson/passe > > The io-page library provides a fairly simple template: > > https://github.com/mirage/io-page/blob/master/_oasis > > It builds io_page_unix and io_page_xen libraries. The C flags are > added to the main META file with: > > XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" > > There's a command to get the Xen flags: > > PostConfCommand: ocaml postconf.ml > > The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the > Unix one (you need a separate file because OASIS can't compile the > same source path with different flags). Thanks, Thomas. - that helps quite a lot I think I've followed the same pattern now, but still haven't been able to get safepass building. I'm using the following for CCOpt: `pkg-config --cflags --static mirage-xen-ocaml` Now the linking phase fails with: + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o src/bcrypt_stub.o ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 section .tbss mismatches non-TLS reference in src/crypt_blowfish.o /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value collect2: error: ld returned 1 exit status Command exited with code 2. E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa src/safepass.a src/safepass.cmxs -tag debug' terminated with error code 10") This seems to be something special about errno being thread-local in glibc. Googling turns up a lot of advice on fixing this problem, but all of it assumes you're just building on linux for linux. bcrypt_stubs.c does , which I believe is being provided by minios-xen-0.8/include/minios-xen/errno.h. However, at link time I don't know where errno is supposed to come from. It seems to be coming from glibc, but shouldn't it be coming from minios instead given that's where the errno header comes from? I poked around with `nm` in minios' built files but couldn't find anything that actually defined errno. -- other things I've tried: 1) I tried using `pkg-config --cflags mirage-xen-ocaml` for CCLib, however `ocamlfind ocamlmklib` didn't seem to like that - it didn't understand "-m elf_x86_64" nor "-T/nix/store/<...>-minios-xen-0.8/lib/minios-xen/libminios.lds" 2) I notice that minios-xen/errno.h has: #ifdef HAVE_LIBC #include extern int errno; #define ERRNO #define errno (get_current()->reent._errno) #endif So just to see what happened, I tried adding -DHAVE_LIBC. But then I get errors because sys/reent.h can't be found, so that's probably not a useful path to explore. Any advice where to go from here? Thanks, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 10 10:15:53 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 10 Jan 2016 10:15:53 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aID2D-0002ld-AG; Sun, 10 Jan 2016 10:15:41 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aID2B-0002lY-Lt for mirageos-devel@lists.xenproject.org; Sun, 10 Jan 2016 10:15:39 +0000 Received: from [85.158.137.68] by server-3.bemta-3.messagelabs.com id 41/82-02499-A4F22965; Sun, 10 Jan 2016 10:15:38 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-5.tower-31.messagelabs.com!1452420935!14946992!1 X-Originating-IP: [209.85.213.44] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 12221 invoked from network); 10 Jan 2016 10:15:35 -0000 Received: from mail-vk0-f44.google.com (HELO mail-vk0-f44.google.com) (209.85.213.44) by server-5.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 10 Jan 2016 10:15:35 -0000 Received: by mail-vk0-f44.google.com with SMTP id i129so73554342vkb.0 for ; Sun, 10 Jan 2016 02:15:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=1T+LMPqgy69hL8C0fW56zzNFWlb4u+JtTSyHD+4zNp0=; b=f2I0mp1/66hkC3dRxVum1bqDGIWePVI9eU3AaEtb8N/MmrVtMr9teZ6f9ZfW4X4lS5 k+fZJCYrqKyJWUD8RCs3HlRcViah6nRcK0niT7xnjjT4F4LwWEuwNcanjqQIegyEfNKi Qla1s7tryPPiwW3THJNPijReGnpWHn+Tic0v5HL+hlwN+TxlqYj6s9yCjyS6ifXWt4pK EHpu7b6hQ3OoQWz4ijJ+/mkpvikC/rfmGOfgjPzLhnoAIU2qCcZkGc0/SeAvGTplbsu5 KF0ULQtX/Hig33rLE6I9v1hMXl94t0Ax8k3fGO7zTqAejT3pQ9LpmF/swjRM8Z64jWHj rRSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=1T+LMPqgy69hL8C0fW56zzNFWlb4u+JtTSyHD+4zNp0=; b=PhivYP5oJ3+7RFgCJ6Z72KtU/jLIZ8gTb+jipn0Bp5GdCZ8EPpBP7KQvrGg+iCTQSL tTfoNEPlRJ3rvjbyIs6Rnk2kz1JnkQe16AL+G+N6CBijtswBVkrGkAVdr5EomYia45tv RNuuAZWKB09MKUdpGHKt5WDQ0SblpWa1kXeNJNMdkh2zmvAXqdEwAOv0YFORvMkotQeH a6oo+QMgQLEHyrEdg4XVvH/BtzKlAxNp972gpbqhQRcJkTKiASiEnT8wQFP2gidGBJ6N NExmqc71Dc1BwSxGOKI54lTeaqzG5u89v/PIoJt5rVnedx00q8Y+zdpNNrOMIPcOTOLN LDVg== X-Gm-Message-State: ALoCoQm908mhSRjTaf8FzrbT+2TJhzEmyjkmaB5bHoJM9zVGbwFj+HIXjfovPj6M7Tj9BGhahdCF0W10/Lp/u5FozGrLpjjXcg== X-Received: by 10.31.180.213 with SMTP id d204mr72996736vkf.80.1452420934612; Sun, 10 Jan 2016 02:15:34 -0800 (PST) Received: from mail-vk0-f49.google.com (mail-vk0-f49.google.com. [209.85.213.49]) by smtp.gmail.com with ESMTPSA id c77sm14972631vkf.26.2016.01.10.02.15.33 for (version=TLSv1/SSLv3 cipher=OTHER); Sun, 10 Jan 2016 02:15:34 -0800 (PST) Received: by mail-vk0-f49.google.com with SMTP id k1so211648384vkb.2 for ; Sun, 10 Jan 2016 02:15:33 -0800 (PST) X-Received: by 10.31.6.17 with SMTP id 17mr84402010vkg.75.1452420933595; Sun, 10 Jan 2016 02:15:33 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Sun, 10 Jan 2016 02:15:14 -0800 (PST) In-Reply-To: References: From: Tim Cuthbertson Date: Sun, 10 Jan 2016 21:15:14 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: > On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >> There is sadly no `safepass-xen` package, and trying to just use >> `safepass` results in link errors: >> >> >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `BF_crypt': >> (.text+0x1b97): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `BF_crypt': >> (.text+0x2112): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `_crypt_blowfish_rn': >> (.text+0x21ea): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `_crypt_gensalt_blowfish_rn': >> (.text+0x2575): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >> `_crypt_gensalt_blowfish_rn': >> (.text+0x25a6): undefined reference to `__errno_location' >> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >> more undefined references to `__errno_location' follow >> >> >> I'm assuming I'd need to customise the build process tp produce an >> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >> is twofold: >> >> - I don't really know what the thing I'm doing is. Is mirage-xen a >> different architecture? A different ABI? Do C libraries need to be >> cross-compiled, or just compiled with particular flags so that they'll >> work on xen-minios instead of gnu/linux? > > C libraries need to be compiled with different headers and flags (in > particular, -mno-red-zone). Using libraries compiled for Linux will > often appear to work, but may fail when interrupts occur, so the build > makes it hard to use them by accident. > > However, OCaml binaries can be shared (ocamlopt doesn't use a red zone > and the OCaml ABI is the same). > >> - The existing scripts seem to be pretty ad-hoc - zarith gets away >> mainly with particular CFLAGS >> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), > > It's using pkg-config to get the important flags. The others are > optimisations (except -fno-builtin, which is either not needed or > should be supplied by Mini-OS). > >> while gmp looks like a full cross-compilation using `--target` (and >> then does some other sneaky things). >> >> safepass uses OASIS for its build system, which doesn't seem to have >> any cross-compilation functionality built in as far as I could tell. >> Can anyone give me pointers on what I'd need to do to safepass' build >> scripts to get this working in mirage-xen, or at the least some >> clarification on why it doesn't work as-is and how cross compilation >> works for C libraries used in mirage-xen? >> >> [0]: https://github.com/timbertson/passe > > The io-page library provides a fairly simple template: > > https://github.com/mirage/io-page/blob/master/_oasis > > It builds io_page_unix and io_page_xen libraries. The C flags are > added to the main META file with: > > XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" > > There's a command to get the Xen flags: > > PostConfCommand: ocaml postconf.ml > > The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the > Unix one (you need a separate file because OASIS can't compile the > same source path with different flags). Thanks, Thomas. - that helps quite a lot I think I've followed the same pattern now, but still haven't been able to get safepass building. I'm using the following for CCOpt: `pkg-config --cflags --static mirage-xen-ocaml` Now the linking phase fails with: + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o src/bcrypt_stub.o ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 section .tbss mismatches non-TLS reference in src/crypt_blowfish.o /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value collect2: error: ld returned 1 exit status Command exited with code 2. E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa src/safepass.a src/safepass.cmxs -tag debug' terminated with error code 10") This seems to be something special about errno being thread-local in glibc. Googling turns up a lot of advice on fixing this problem, but all of it assumes you're just building on linux for linux. bcrypt_stubs.c does , which I believe is being provided by minios-xen-0.8/include/minios-xen/errno.h. However, at link time I don't know where errno is supposed to come from. It seems to be coming from glibc, but shouldn't it be coming from minios instead given that's where the errno header comes from? I poked around with `nm` in minios' built files but couldn't find anything that actually defined errno. -- other things I've tried: 1) I tried using `pkg-config --cflags mirage-xen-ocaml` for CCLib, however `ocamlfind ocamlmklib` didn't seem to like that - it didn't understand "-m elf_x86_64" nor "-T/nix/store/<...>-minios-xen-0.8/lib/minios-xen/libminios.lds" 2) I notice that minios-xen/errno.h has: #ifdef HAVE_LIBC #include extern int errno; #define ERRNO #define errno (get_current()->reent._errno) #endif So just to see what happened, I tried adding -DHAVE_LIBC. But then I get errors because sys/reent.h can't be found, so that's probably not a useful path to explore. Any advice where to go from here? Thanks, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 10 16:50:52 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 10 Jan 2016 16:50:52 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIJCT-0008OH-AQ; Sun, 10 Jan 2016 16:50:41 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIJCS-0008OC-Ip for mirageos-devel@lists.xenproject.org; Sun, 10 Jan 2016 16:50:40 +0000 Received: from [193.109.254.147] by server-2.bemta-14.messagelabs.com id CE/91-12889-FDB82965; Sun, 10 Jan 2016 16:50:39 +0000 X-Env-Sender: meta@gmx.com X-Msg-Ref: server-16.tower-27.messagelabs.com!1452444638!15779611!1 X-Originating-IP: [212.227.17.22] X-SpamReason: No, hits=0.6 required=7.0 tests=sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE3LjIyID0+IDIxMDU4\n,sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE3LjIyID0+IDIxMDU4\n,HTML_50_60,HTML_MESSAGE, MIME_HTML_ONLY X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 9444 invoked from network); 10 Jan 2016 16:50:38 -0000 Received: from mout.gmx.net (HELO mout.gmx.net) (212.227.17.22) by server-16.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 10 Jan 2016 16:50:38 -0000 Received: from [128.232.109.3] by 3capp-mailcom-bs12.server.lan (via HTTP); Sun, 10 Jan 2016 17:50:37 +0100 MIME-Version: 1.0 Message-ID: From: "M. O." To: "Thomas Leonard" Date: Sun, 10 Jan 2016 17:50:37 +0100 Importance: normal Sensitivity: Normal In-Reply-To: References: , X-UI-Message-Type: mail X-Priority: 3 X-Provags-ID: V03:K0:zl40VWxlI+jbmE+1NY/PVRuiz6l1GQOyx5rR2hRGBiS ELrMkK07RDLDBysLxEbzgM4qwwosqBjFYPD0QXDHhyeS/sy7Db 46Kfn7jvkbDvc7fN6hk32tn9CeVdWAFdK8LXc5KCDeJwj6exKW Ci1a2xws2IWFqRuKgerwnUor/qOmdSYzksmNo5071E7snalFeN 2+EomTaLLbbk9uKT0as3Ea6OL3nrnOmv1LsMx90GaEpd9cnsja ijNz/gVU4LtNniWLsna+YEWrtGm617TvJ7NpA9IIzXGmmrK9AJ eDtoc6Uq8JcgxpbuNhPnF88ko4f X-UI-Out-Filterresults: notjunk:1;V01:K0:hX8UdgU4zTI=:BKbgHS55AR1zJqGrfiy+Cz TsokZUPe5GP2FvOi5QfUmOGntjGEjp+xKqilTeiv4xMU6AyMKGgq1Sim0TpY3c0TNr0s9Bl+W xJ1UI4cuzB2Wamtr2aTxYUcaCJb8IPtHS/F9ippMq+qy0MuSiAOxEZDaKnWlnuQIb8FrJ7UcT /8xZRvZqc5bw9okgJhKFkwfXfil8aNqe9sEBeD5cX/meqHC2I7LFqiq49JIzVkfUcGcb7T/W0 IPY+ZsY7fhoT977uqyd+CjQXeqz/DsB5GLOpuRSVQFFEwVNORXRc9hh6i3PoUpNPD1KiWXsCE P0Y6LajCAkgGmRfh5Uloyoyfylv3V9CW2qxeqG/mgmEke9wAgy32/laY5UIPJUPNlBsj4eDcb 7K7VqUNT7d5Ksyl1k6+X3udoqql68eLzPZSpndNqkhfTwPezHakEpVUrdjSA70ZL3FQlgRSgQ NiRR1JiCaw== Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Changes in Irmin 0.10.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============2724035209729321755==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============2724035209729321755== Content-Type: text/html; charset=UTF-8
Thanks, and how to unwatch a key that is under watch by I.watch_key?
 
> Hi,
>
> Questions regarding changes in Irmin 0.10.0:
>
> 1- Is there any equivalence for "Irmin.watch_tags" in the previous releases?

Irmin.Repo.watch_branches

> 2- This is somehow related to the first question, that is how to create a
> store similar to "Store.of_head config task head" (for instance, from the
> heads that watch_tag sends to the callback function) in the older versions.

of_head is now of_commit_id.
 
--===============2724035209729321755== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============2724035209729321755==-- From mirageos-devel-bounces@lists.xenproject.org Sun Jan 10 16:50:52 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 10 Jan 2016 16:50:52 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIJCT-0008OH-AQ; Sun, 10 Jan 2016 16:50:41 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIJCS-0008OC-Ip for mirageos-devel@lists.xenproject.org; Sun, 10 Jan 2016 16:50:40 +0000 Received: from [193.109.254.147] by server-2.bemta-14.messagelabs.com id CE/91-12889-FDB82965; Sun, 10 Jan 2016 16:50:39 +0000 X-Env-Sender: meta@gmx.com X-Msg-Ref: server-16.tower-27.messagelabs.com!1452444638!15779611!1 X-Originating-IP: [212.227.17.22] X-SpamReason: No, hits=0.6 required=7.0 tests=sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE3LjIyID0+IDIxMDU4\n,sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE3LjIyID0+IDIxMDU4\n,HTML_50_60,HTML_MESSAGE, MIME_HTML_ONLY X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 9444 invoked from network); 10 Jan 2016 16:50:38 -0000 Received: from mout.gmx.net (HELO mout.gmx.net) (212.227.17.22) by server-16.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 10 Jan 2016 16:50:38 -0000 Received: from [128.232.109.3] by 3capp-mailcom-bs12.server.lan (via HTTP); Sun, 10 Jan 2016 17:50:37 +0100 MIME-Version: 1.0 Message-ID: From: "M. O." To: "Thomas Leonard" Date: Sun, 10 Jan 2016 17:50:37 +0100 Importance: normal Sensitivity: Normal In-Reply-To: References: , X-UI-Message-Type: mail X-Priority: 3 X-Provags-ID: V03:K0:zl40VWxlI+jbmE+1NY/PVRuiz6l1GQOyx5rR2hRGBiS ELrMkK07RDLDBysLxEbzgM4qwwosqBjFYPD0QXDHhyeS/sy7Db 46Kfn7jvkbDvc7fN6hk32tn9CeVdWAFdK8LXc5KCDeJwj6exKW Ci1a2xws2IWFqRuKgerwnUor/qOmdSYzksmNo5071E7snalFeN 2+EomTaLLbbk9uKT0as3Ea6OL3nrnOmv1LsMx90GaEpd9cnsja ijNz/gVU4LtNniWLsna+YEWrtGm617TvJ7NpA9IIzXGmmrK9AJ eDtoc6Uq8JcgxpbuNhPnF88ko4f X-UI-Out-Filterresults: notjunk:1;V01:K0:hX8UdgU4zTI=:BKbgHS55AR1zJqGrfiy+Cz TsokZUPe5GP2FvOi5QfUmOGntjGEjp+xKqilTeiv4xMU6AyMKGgq1Sim0TpY3c0TNr0s9Bl+W xJ1UI4cuzB2Wamtr2aTxYUcaCJb8IPtHS/F9ippMq+qy0MuSiAOxEZDaKnWlnuQIb8FrJ7UcT /8xZRvZqc5bw9okgJhKFkwfXfil8aNqe9sEBeD5cX/meqHC2I7LFqiq49JIzVkfUcGcb7T/W0 IPY+ZsY7fhoT977uqyd+CjQXeqz/DsB5GLOpuRSVQFFEwVNORXRc9hh6i3PoUpNPD1KiWXsCE P0Y6LajCAkgGmRfh5Uloyoyfylv3V9CW2qxeqG/mgmEke9wAgy32/laY5UIPJUPNlBsj4eDcb 7K7VqUNT7d5Ksyl1k6+X3udoqql68eLzPZSpndNqkhfTwPezHakEpVUrdjSA70ZL3FQlgRSgQ NiRR1JiCaw== Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Changes in Irmin 0.10.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============2724035209729321755==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============2724035209729321755== Content-Type: text/html; charset=UTF-8
Thanks, and how to unwatch a key that is under watch by I.watch_key?
 
> Hi,
>
> Questions regarding changes in Irmin 0.10.0:
>
> 1- Is there any equivalence for "Irmin.watch_tags" in the previous releases?

Irmin.Repo.watch_branches

> 2- This is somehow related to the first question, that is how to create a
> store similar to "Store.of_head config task head" (for instance, from the
> heads that watch_tag sends to the callback function) in the older versions.

of_head is now of_commit_id.
 
--===============2724035209729321755== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============2724035209729321755==-- From mirageos-devel-bounces@lists.xenproject.org Sun Jan 10 17:52:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 10 Jan 2016 17:52:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIK9v-00013M-5F; Sun, 10 Jan 2016 17:52:07 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIK9t-00013H-Ve for mirageos-devel@lists.xenproject.org; Sun, 10 Jan 2016 17:52:06 +0000 Received: from [85.158.139.211] by server-12.bemta-5.messagelabs.com id A8/37-12831-54A92965; Sun, 10 Jan 2016 17:52:05 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-7.tower-206.messagelabs.com!1452448323!14689571!1 X-Originating-IP: [209.85.213.47] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 17559 invoked from network); 10 Jan 2016 17:52:04 -0000 Received: from mail-vk0-f47.google.com (HELO mail-vk0-f47.google.com) (209.85.213.47) by server-7.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 10 Jan 2016 17:52:04 -0000 Received: by mail-vk0-f47.google.com with SMTP id a123so183496257vkh.1 for ; Sun, 10 Jan 2016 09:52:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=ebP5IC1X2fz2k5xzmH5tjjWhXZo1/FjL8mOX+QhPGkE=; b=RF6F08Ir6Nqr+n2qosIwha2dZl99FGkGrLWZwzATSUysEsKVdGZHfsFKcBpVTvqJwr Lpuzw7n5hjpBJ4YrsxwEga0xkApSm3aEiFHOtPSzfj+ZyrtdLLbrdJlF5OmJLNju3EmC E6SBjQGrykUCegVweRZyVcBRWxoNHR2xZsOFT4d2h82TEeOJ70BSvlcuwejwDjzC/JMc 7EdEcWOe9KXcGiHp1Up5IIxVFgYZmSIZSsmbuhuxs/moMyyjcq9GV3QiDSJWUJQMK+uL 4xaPkdqqfSG3+ajDZ002WyNT9N/6/T0ktPFEkPgMlbM2qVdawq1n5m1hWn1L+wjs02UO VOGg== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr87279101vki.41.1452448323150; Sun, 10 Jan 2016 09:52:03 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sun, 10 Jan 2016 09:52:03 -0800 (PST) In-Reply-To: References: Date: Sun, 10 Jan 2016 17:52:03 +0000 Message-ID: From: Thomas Leonard To: Tim Cuthbertson Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 10 January 2016 at 10:15, Tim Cuthbertson wrote: > On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: >> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >>> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >>> There is sadly no `safepass-xen` package, and trying to just use >>> `safepass` results in link errors: >>> >>> >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `BF_crypt': >>> (.text+0x1b97): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `BF_crypt': >>> (.text+0x2112): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `_crypt_blowfish_rn': >>> (.text+0x21ea): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `_crypt_gensalt_blowfish_rn': >>> (.text+0x2575): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `_crypt_gensalt_blowfish_rn': >>> (.text+0x25a6): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >>> more undefined references to `__errno_location' follow >>> >>> >>> I'm assuming I'd need to customise the build process tp produce an >>> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >>> is twofold: >>> >>> - I don't really know what the thing I'm doing is. Is mirage-xen a >>> different architecture? A different ABI? Do C libraries need to be >>> cross-compiled, or just compiled with particular flags so that they'll >>> work on xen-minios instead of gnu/linux? >> >> C libraries need to be compiled with different headers and flags (in >> particular, -mno-red-zone). Using libraries compiled for Linux will >> often appear to work, but may fail when interrupts occur, so the build >> makes it hard to use them by accident. >> >> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone >> and the OCaml ABI is the same). >> >>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >>> mainly with particular CFLAGS >>> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >> >> It's using pkg-config to get the important flags. The others are >> optimisations (except -fno-builtin, which is either not needed or >> should be supplied by Mini-OS). >> >>> while gmp looks like a full cross-compilation using `--target` (and >>> then does some other sneaky things). >>> >>> safepass uses OASIS for its build system, which doesn't seem to have >>> any cross-compilation functionality built in as far as I could tell. >>> Can anyone give me pointers on what I'd need to do to safepass' build >>> scripts to get this working in mirage-xen, or at the least some >>> clarification on why it doesn't work as-is and how cross compilation >>> works for C libraries used in mirage-xen? >>> >>> [0]: https://github.com/timbertson/passe >> >> The io-page library provides a fairly simple template: >> >> https://github.com/mirage/io-page/blob/master/_oasis >> >> It builds io_page_unix and io_page_xen libraries. The C flags are >> added to the main META file with: >> >> XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" >> >> There's a command to get the Xen flags: >> >> PostConfCommand: ocaml postconf.ml >> >> The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the >> Unix one (you need a separate file because OASIS can't compile the >> same source path with different flags). > > Thanks, Thomas. - that helps quite a lot > > I think I've followed the same pattern now, but still haven't been > able to get safepass building. > > I'm using the following for CCOpt: > > `pkg-config --cflags --static mirage-xen-ocaml` > > Now the linking phase fails with: > > + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o > src/bcrypt_stub.o > ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 > section .tbss mismatches non-TLS reference in src/crypt_blowfish.o > /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value > collect2: error: ld returned 1 exit status > Command exited with code 2. > E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a > src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa > src/safepass.a src/safepass.cmxs -tag debug' terminated with error > code 10") Try running it as "ocamlfind ocamlmklib -verbose" to see what commands it's actually using. For io-page, I get: $ ocamlfind ocamlmklib -verbose -o lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o Effective set of compiler predicates: autolink,byte,native + ocamlmklib -ocamlc ocamlc.opt -ocamlopt ocamlopt.opt -verbose -o lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o + gcc -shared -o lib/dllio_page_xen_stubs.so lib/stub_alloc_pages_xen.o + ar rc lib/libio_page_xen_stubs.a lib/stub_alloc_pages_xen.o; ranlib lib/libio_page_xen_stubs.a So it doesn't seem to be using ld at all, just ar. > This seems to be something special about errno being thread-local in > glibc. Googling turns up a lot of advice on fixing this problem, but > all of it assumes you're just building on linux for linux. > bcrypt_stubs.c does , which I believe is being provided by > minios-xen-0.8/include/minios-xen/errno.h. > > However, at link time I don't know where errno is supposed to come > from. It seems to be coming from glibc, but shouldn't it be coming > from minios instead given that's where the errno header comes from? I > poked around with `nm` in minios' built files but couldn't find > anything that actually defined errno. It's from mirage-xen: https://github.com/mirage/mirage-platform/blob/c035439de703edbfdd096044afdbab85f4cbf61f/bindings/main.c#L30 > -- other things I've tried: > > 1) I tried using `pkg-config --cflags mirage-xen-ocaml` for CCLib, > however `ocamlfind ocamlmklib` didn't seem to like that - it didn't > understand "-m elf_x86_64" nor > "-T/nix/store/<...>-minios-xen-0.8/lib/minios-xen/libminios.lds" > > 2) I notice that minios-xen/errno.h has: > > #ifdef HAVE_LIBC > #include > extern int errno; > #define ERRNO > #define errno (get_current()->reent._errno) > #endif > > So just to see what happened, I tried adding -DHAVE_LIBC. But then I > get errors because sys/reent.h can't be found, so that's probably not > a useful path to explore. > > Any advice where to go from here? > > Thanks, > - Tim. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 10 17:52:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 10 Jan 2016 17:52:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIK9v-00013M-5F; Sun, 10 Jan 2016 17:52:07 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIK9t-00013H-Ve for mirageos-devel@lists.xenproject.org; Sun, 10 Jan 2016 17:52:06 +0000 Received: from [85.158.139.211] by server-12.bemta-5.messagelabs.com id A8/37-12831-54A92965; Sun, 10 Jan 2016 17:52:05 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-7.tower-206.messagelabs.com!1452448323!14689571!1 X-Originating-IP: [209.85.213.47] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 17559 invoked from network); 10 Jan 2016 17:52:04 -0000 Received: from mail-vk0-f47.google.com (HELO mail-vk0-f47.google.com) (209.85.213.47) by server-7.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 10 Jan 2016 17:52:04 -0000 Received: by mail-vk0-f47.google.com with SMTP id a123so183496257vkh.1 for ; Sun, 10 Jan 2016 09:52:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=ebP5IC1X2fz2k5xzmH5tjjWhXZo1/FjL8mOX+QhPGkE=; b=RF6F08Ir6Nqr+n2qosIwha2dZl99FGkGrLWZwzATSUysEsKVdGZHfsFKcBpVTvqJwr Lpuzw7n5hjpBJ4YrsxwEga0xkApSm3aEiFHOtPSzfj+ZyrtdLLbrdJlF5OmJLNju3EmC E6SBjQGrykUCegVweRZyVcBRWxoNHR2xZsOFT4d2h82TEeOJ70BSvlcuwejwDjzC/JMc 7EdEcWOe9KXcGiHp1Up5IIxVFgYZmSIZSsmbuhuxs/moMyyjcq9GV3QiDSJWUJQMK+uL 4xaPkdqqfSG3+ajDZ002WyNT9N/6/T0ktPFEkPgMlbM2qVdawq1n5m1hWn1L+wjs02UO VOGg== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr87279101vki.41.1452448323150; Sun, 10 Jan 2016 09:52:03 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sun, 10 Jan 2016 09:52:03 -0800 (PST) In-Reply-To: References: Date: Sun, 10 Jan 2016 17:52:03 +0000 Message-ID: From: Thomas Leonard To: Tim Cuthbertson Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 10 January 2016 at 10:15, Tim Cuthbertson wrote: > On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: >> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >>> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >>> There is sadly no `safepass-xen` package, and trying to just use >>> `safepass` results in link errors: >>> >>> >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `BF_crypt': >>> (.text+0x1b97): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `BF_crypt': >>> (.text+0x2112): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `_crypt_blowfish_rn': >>> (.text+0x21ea): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `_crypt_gensalt_blowfish_rn': >>> (.text+0x2575): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>> `_crypt_gensalt_blowfish_rn': >>> (.text+0x25a6): undefined reference to `__errno_location' >>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >>> more undefined references to `__errno_location' follow >>> >>> >>> I'm assuming I'd need to customise the build process tp produce an >>> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >>> is twofold: >>> >>> - I don't really know what the thing I'm doing is. Is mirage-xen a >>> different architecture? A different ABI? Do C libraries need to be >>> cross-compiled, or just compiled with particular flags so that they'll >>> work on xen-minios instead of gnu/linux? >> >> C libraries need to be compiled with different headers and flags (in >> particular, -mno-red-zone). Using libraries compiled for Linux will >> often appear to work, but may fail when interrupts occur, so the build >> makes it hard to use them by accident. >> >> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone >> and the OCaml ABI is the same). >> >>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >>> mainly with particular CFLAGS >>> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >> >> It's using pkg-config to get the important flags. The others are >> optimisations (except -fno-builtin, which is either not needed or >> should be supplied by Mini-OS). >> >>> while gmp looks like a full cross-compilation using `--target` (and >>> then does some other sneaky things). >>> >>> safepass uses OASIS for its build system, which doesn't seem to have >>> any cross-compilation functionality built in as far as I could tell. >>> Can anyone give me pointers on what I'd need to do to safepass' build >>> scripts to get this working in mirage-xen, or at the least some >>> clarification on why it doesn't work as-is and how cross compilation >>> works for C libraries used in mirage-xen? >>> >>> [0]: https://github.com/timbertson/passe >> >> The io-page library provides a fairly simple template: >> >> https://github.com/mirage/io-page/blob/master/_oasis >> >> It builds io_page_unix and io_page_xen libraries. The C flags are >> added to the main META file with: >> >> XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" >> >> There's a command to get the Xen flags: >> >> PostConfCommand: ocaml postconf.ml >> >> The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the >> Unix one (you need a separate file because OASIS can't compile the >> same source path with different flags). > > Thanks, Thomas. - that helps quite a lot > > I think I've followed the same pattern now, but still haven't been > able to get safepass building. > > I'm using the following for CCOpt: > > `pkg-config --cflags --static mirage-xen-ocaml` > > Now the linking phase fails with: > > + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o > src/bcrypt_stub.o > ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 > section .tbss mismatches non-TLS reference in src/crypt_blowfish.o > /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value > collect2: error: ld returned 1 exit status > Command exited with code 2. > E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a > src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa > src/safepass.a src/safepass.cmxs -tag debug' terminated with error > code 10") Try running it as "ocamlfind ocamlmklib -verbose" to see what commands it's actually using. For io-page, I get: $ ocamlfind ocamlmklib -verbose -o lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o Effective set of compiler predicates: autolink,byte,native + ocamlmklib -ocamlc ocamlc.opt -ocamlopt ocamlopt.opt -verbose -o lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o + gcc -shared -o lib/dllio_page_xen_stubs.so lib/stub_alloc_pages_xen.o + ar rc lib/libio_page_xen_stubs.a lib/stub_alloc_pages_xen.o; ranlib lib/libio_page_xen_stubs.a So it doesn't seem to be using ld at all, just ar. > This seems to be something special about errno being thread-local in > glibc. Googling turns up a lot of advice on fixing this problem, but > all of it assumes you're just building on linux for linux. > bcrypt_stubs.c does , which I believe is being provided by > minios-xen-0.8/include/minios-xen/errno.h. > > However, at link time I don't know where errno is supposed to come > from. It seems to be coming from glibc, but shouldn't it be coming > from minios instead given that's where the errno header comes from? I > poked around with `nm` in minios' built files but couldn't find > anything that actually defined errno. It's from mirage-xen: https://github.com/mirage/mirage-platform/blob/c035439de703edbfdd096044afdbab85f4cbf61f/bindings/main.c#L30 > -- other things I've tried: > > 1) I tried using `pkg-config --cflags mirage-xen-ocaml` for CCLib, > however `ocamlfind ocamlmklib` didn't seem to like that - it didn't > understand "-m elf_x86_64" nor > "-T/nix/store/<...>-minios-xen-0.8/lib/minios-xen/libminios.lds" > > 2) I notice that minios-xen/errno.h has: > > #ifdef HAVE_LIBC > #include > extern int errno; > #define ERRNO > #define errno (get_current()->reent._errno) > #endif > > So just to see what happened, I tried adding -DHAVE_LIBC. But then I > get errors because sys/reent.h can't be found, so that's probably not > a useful path to explore. > > Any advice where to go from here? > > Thanks, > - Tim. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 11 09:06:57 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 11 Jan 2016 09:06:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIYR6-0005c7-8G; Mon, 11 Jan 2016 09:06:48 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIYR4-0005by-1Z for mirageos-devel@lists.xenproject.org; Mon, 11 Jan 2016 09:06:46 +0000 Received: from [85.158.137.68] by server-1.bemta-3.messagelabs.com id A8/78-02745-5A073965; Mon, 11 Jan 2016 09:06:45 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-4.tower-31.messagelabs.com!1452503202!5413126!1 X-Originating-IP: [209.85.213.51] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 15729 invoked from network); 11 Jan 2016 09:06:43 -0000 Received: from mail-vk0-f51.google.com (HELO mail-vk0-f51.google.com) (209.85.213.51) by server-4.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 11 Jan 2016 09:06:43 -0000 Received: by mail-vk0-f51.google.com with SMTP id i129so82584595vkb.0 for ; Mon, 11 Jan 2016 01:06:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=jWEr+LZGW7aDHazRhQxXqN3xK/vgY9OWDbI3sfhJyc4=; b=Oh5Yx/RXwdqPg9d0Xp16q9g+g4L5LoKJcSrC1cq4hOxbdw86vIDWEp8k9+JDwbsLTB iI9TdHmayGjckSm4EUEpWR0hqqz5d8vMUo0fvGO8FqL95HML7/Cvh1bolRgYav2l0Jon NXqHd8qUWB5+KueF64uhrzHIVAOQwNApDCIzM7ektS0qGETpnjpy+IF38KkZpKEnKaCW qXYlIuDCxACIaA4opjJYbCMp75RfOWvZswnR62+KISBMENvN0GS4L2RnOMGhLEotecgb mdJhD6g2uBg7eZ1/noGBGaUbNmRvdsscYI/TQUuNKqQrpvH/8w56vt8NqNM/hKxotxmq 6eSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=jWEr+LZGW7aDHazRhQxXqN3xK/vgY9OWDbI3sfhJyc4=; b=M70DfeYS7pnpzRsj5W0lsNLBEOvxy54CO/gjKTZpKYYXkBqAT8ySUZURZkGOOpYfPM sHqbnTkmhPkowR5svhBJtofKm2pXm5m2w1Nlp9oqG4poY8ytvdfXTvjg96WXrCj86AXq I+aJ1Myl4VJJtBxBuyeuKC3JQUicyeT73OF7vrNuB2OZe+AU8WXZDRlEsKv11uV/02Vo NrCQZyD0b4+jfPep9B9zly6oK98x7oi6CONStZZZndphAj5kJXUbtwlC1uVYv+t0HmSx Kgn2yrxKyoEDfuu6JNVh+DvRHpHoFQUXZw8bnaY9DGD/WG8Z6wNrEMk8W5JPXg1G5krL dCxQ== X-Gm-Message-State: ALoCoQmOK5ppoIzET7mKKxmSVyaRLFjgQZOviGDYHcG2QmD9rVIeRHlA/XyTRv4USeSViorAalUwcctM96uW5E1gKHA36r55kg== X-Received: by 10.31.16.226 with SMTP id 95mr85358106vkq.143.1452503202403; Mon, 11 Jan 2016 01:06:42 -0800 (PST) Received: from mail-vk0-f41.google.com (mail-vk0-f41.google.com. [209.85.213.41]) by smtp.gmail.com with ESMTPSA id v145sm15268414vkv.6.2016.01.11.01.06.41 for (version=TLSv1/SSLv3 cipher=OTHER); Mon, 11 Jan 2016 01:06:41 -0800 (PST) Received: by mail-vk0-f41.google.com with SMTP id i129so82584429vkb.0 for ; Mon, 11 Jan 2016 01:06:41 -0800 (PST) X-Received: by 10.31.21.210 with SMTP id 201mr88985036vkv.132.1452503201597; Mon, 11 Jan 2016 01:06:41 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Mon, 11 Jan 2016 01:06:22 -0800 (PST) In-Reply-To: References: From: Tim Cuthbertson Date: Mon, 11 Jan 2016 20:06:22 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard wrote: > On 10 January 2016 at 10:15, Tim Cuthbertson wrote: >> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: >>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >>>> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >>>> There is sadly no `safepass-xen` package, and trying to just use >>>> `safepass` results in link errors: >>>> >>>> >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `BF_crypt': >>>> (.text+0x1b97): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `BF_crypt': >>>> (.text+0x2112): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `_crypt_blowfish_rn': >>>> (.text+0x21ea): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `_crypt_gensalt_blowfish_rn': >>>> (.text+0x2575): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `_crypt_gensalt_blowfish_rn': >>>> (.text+0x25a6): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >>>> more undefined references to `__errno_location' follow >>>> >>>> >>>> I'm assuming I'd need to customise the build process tp produce an >>>> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >>>> is twofold: >>>> >>>> - I don't really know what the thing I'm doing is. Is mirage-xen a >>>> different architecture? A different ABI? Do C libraries need to be >>>> cross-compiled, or just compiled with particular flags so that they'll >>>> work on xen-minios instead of gnu/linux? >>> >>> C libraries need to be compiled with different headers and flags (in >>> particular, -mno-red-zone). Using libraries compiled for Linux will >>> often appear to work, but may fail when interrupts occur, so the build >>> makes it hard to use them by accident. >>> >>> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone >>> and the OCaml ABI is the same). >>> >>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >>>> mainly with particular CFLAGS >>>> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >>> >>> It's using pkg-config to get the important flags. The others are >>> optimisations (except -fno-builtin, which is either not needed or >>> should be supplied by Mini-OS). >>> >>>> while gmp looks like a full cross-compilation using `--target` (and >>>> then does some other sneaky things). >>>> >>>> safepass uses OASIS for its build system, which doesn't seem to have >>>> any cross-compilation functionality built in as far as I could tell. >>>> Can anyone give me pointers on what I'd need to do to safepass' build >>>> scripts to get this working in mirage-xen, or at the least some >>>> clarification on why it doesn't work as-is and how cross compilation >>>> works for C libraries used in mirage-xen? >>>> >>>> [0]: https://github.com/timbertson/passe >>> >>> The io-page library provides a fairly simple template: >>> >>> https://github.com/mirage/io-page/blob/master/_oasis >>> >>> It builds io_page_unix and io_page_xen libraries. The C flags are >>> added to the main META file with: >>> >>> XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" >>> >>> There's a command to get the Xen flags: >>> >>> PostConfCommand: ocaml postconf.ml >>> >>> The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the >>> Unix one (you need a separate file because OASIS can't compile the >>> same source path with different flags). >> >> Thanks, Thomas. - that helps quite a lot >> >> I think I've followed the same pattern now, but still haven't been >> able to get safepass building. >> >> I'm using the following for CCOpt: >> >> `pkg-config --cflags --static mirage-xen-ocaml` >> >> Now the linking phase fails with: >> >> + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o >> src/bcrypt_stub.o >> ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 >> section .tbss mismatches non-TLS reference in src/crypt_blowfish.o >> /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value >> collect2: error: ld returned 1 exit status >> Command exited with code 2. >> E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a >> src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa >> src/safepass.a src/safepass.cmxs -tag debug' terminated with error >> code 10") > > Try running it as "ocamlfind ocamlmklib -verbose" to see what commands > it's actually using. For io-page, I get: > > $ ocamlfind ocamlmklib -verbose -o lib/io_page_xen_stubs > lib/stub_alloc_pages_xen.o > Effective set of compiler predicates: autolink,byte,native > + ocamlmklib -ocamlc ocamlc.opt -ocamlopt ocamlopt.opt -verbose -o > lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o > + gcc -shared -o lib/dllio_page_xen_stubs.so lib/stub_alloc_pages_xen.o > + ar rc lib/libio_page_xen_stubs.a lib/stub_alloc_pages_xen.o; ranlib > lib/libio_page_xen_stubs.a > > So it doesn't seem to be using ld at all, just ar. Tracing it with strace, that `gcc -shared` process ends up invoking `ld` internally. I tried running ocamlmklib with the `-failsafe` option, and it does continue past this and produce the static .a library using `ar`. But if I try and put that flag into the larger build it doesn't get much further, because it hits the same issue when creating src/safepass.cmxs: + ocamlfind ocamlopt -shared -I src src/safepass.cmxa src/bcrypt.cmx -o src/safepass.cmxs ld: errno: TLS definition in libc.so.6 section .tbss mismatches non-TLS reference in src/libsafepass_stubs.a(crypt_blowfish.o) libc.so.6: could not read symbols: Bad value collect2: error: ld returned 1 exit status >> This seems to be something special about errno being thread-local in >> glibc. Googling turns up a lot of advice on fixing this problem, but >> all of it assumes you're just building on linux for linux. >> bcrypt_stubs.c does , which I believe is being provided by >> minios-xen-0.8/include/minios-xen/errno.h. >> >> However, at link time I don't know where errno is supposed to come >> from. It seems to be coming from glibc, but shouldn't it be coming >> from minios instead given that's where the errno header comes from? I >> poked around with `nm` in minios' built files but couldn't find >> anything that actually defined errno. > > It's from mirage-xen: > > https://github.com/mirage/mirage-platform/blob/c035439de703edbfdd096044afdbab85f4cbf61f/bindings/main.c#L30 Which compiled libraries does that end up in though? I tried `nm`-ing all the built files from mirage-{xen,xen-posix,xen-ocaml} with: $ find /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4 /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4 /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3 -type f -exec bash -c 'if nm {} 2>/dev/null | grep -q errno; then echo {}; nm {} | grep errno; fi' \; /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4/lib/mirage-xen-ocaml/libxenasmrun.a U errno U errno U errno U errno /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4/lib/mirage-xen-posix/libxenposix.a U errno 0000000000000e4a T __h_errno_location /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3/lib/mirage-xen/libxencamlbindings.a 0000000000000004 C errno So there are only .a files (which ld ignores when creating a shared library, doesn't it?), and only libxencamlbindings actually defines it (the others just reference it), which doesn't seem like a library I'd necessarily need to link against. I don't know if mirage-xen actually makes use of .so libraries, as I've only seen it produce static executables. But even if it doesn't need them, I'd need to somehow tell oasis not to build shared versions of safepass (both the .so and the .cmxs). >> -- other things I've tried: >> >> 1) I tried using `pkg-config --cflags mirage-xen-ocaml` for CCLib, >> however `ocamlfind ocamlmklib` didn't seem to like that - it didn't >> understand "-m elf_x86_64" nor >> "-T/nix/store/<...>-minios-xen-0.8/lib/minios-xen/libminios.lds" >> >> 2) I notice that minios-xen/errno.h has: >> >> #ifdef HAVE_LIBC >> #include >> extern int errno; >> #define ERRNO >> #define errno (get_current()->reent._errno) >> #endif >> >> So just to see what happened, I tried adding -DHAVE_LIBC. But then I >> get errors because sys/reent.h can't be found, so that's probably not >> a useful path to explore. >> >> Any advice where to go from here? >> >> Thanks, >> - Tim. > > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 11 09:06:57 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 11 Jan 2016 09:06:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIYR6-0005c7-8G; Mon, 11 Jan 2016 09:06:48 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIYR4-0005by-1Z for mirageos-devel@lists.xenproject.org; Mon, 11 Jan 2016 09:06:46 +0000 Received: from [85.158.137.68] by server-1.bemta-3.messagelabs.com id A8/78-02745-5A073965; Mon, 11 Jan 2016 09:06:45 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-4.tower-31.messagelabs.com!1452503202!5413126!1 X-Originating-IP: [209.85.213.51] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 15729 invoked from network); 11 Jan 2016 09:06:43 -0000 Received: from mail-vk0-f51.google.com (HELO mail-vk0-f51.google.com) (209.85.213.51) by server-4.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 11 Jan 2016 09:06:43 -0000 Received: by mail-vk0-f51.google.com with SMTP id i129so82584595vkb.0 for ; Mon, 11 Jan 2016 01:06:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=jWEr+LZGW7aDHazRhQxXqN3xK/vgY9OWDbI3sfhJyc4=; b=Oh5Yx/RXwdqPg9d0Xp16q9g+g4L5LoKJcSrC1cq4hOxbdw86vIDWEp8k9+JDwbsLTB iI9TdHmayGjckSm4EUEpWR0hqqz5d8vMUo0fvGO8FqL95HML7/Cvh1bolRgYav2l0Jon NXqHd8qUWB5+KueF64uhrzHIVAOQwNApDCIzM7ektS0qGETpnjpy+IF38KkZpKEnKaCW qXYlIuDCxACIaA4opjJYbCMp75RfOWvZswnR62+KISBMENvN0GS4L2RnOMGhLEotecgb mdJhD6g2uBg7eZ1/noGBGaUbNmRvdsscYI/TQUuNKqQrpvH/8w56vt8NqNM/hKxotxmq 6eSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=jWEr+LZGW7aDHazRhQxXqN3xK/vgY9OWDbI3sfhJyc4=; b=M70DfeYS7pnpzRsj5W0lsNLBEOvxy54CO/gjKTZpKYYXkBqAT8ySUZURZkGOOpYfPM sHqbnTkmhPkowR5svhBJtofKm2pXm5m2w1Nlp9oqG4poY8ytvdfXTvjg96WXrCj86AXq I+aJ1Myl4VJJtBxBuyeuKC3JQUicyeT73OF7vrNuB2OZe+AU8WXZDRlEsKv11uV/02Vo NrCQZyD0b4+jfPep9B9zly6oK98x7oi6CONStZZZndphAj5kJXUbtwlC1uVYv+t0HmSx Kgn2yrxKyoEDfuu6JNVh+DvRHpHoFQUXZw8bnaY9DGD/WG8Z6wNrEMk8W5JPXg1G5krL dCxQ== X-Gm-Message-State: ALoCoQmOK5ppoIzET7mKKxmSVyaRLFjgQZOviGDYHcG2QmD9rVIeRHlA/XyTRv4USeSViorAalUwcctM96uW5E1gKHA36r55kg== X-Received: by 10.31.16.226 with SMTP id 95mr85358106vkq.143.1452503202403; Mon, 11 Jan 2016 01:06:42 -0800 (PST) Received: from mail-vk0-f41.google.com (mail-vk0-f41.google.com. [209.85.213.41]) by smtp.gmail.com with ESMTPSA id v145sm15268414vkv.6.2016.01.11.01.06.41 for (version=TLSv1/SSLv3 cipher=OTHER); Mon, 11 Jan 2016 01:06:41 -0800 (PST) Received: by mail-vk0-f41.google.com with SMTP id i129so82584429vkb.0 for ; Mon, 11 Jan 2016 01:06:41 -0800 (PST) X-Received: by 10.31.21.210 with SMTP id 201mr88985036vkv.132.1452503201597; Mon, 11 Jan 2016 01:06:41 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Mon, 11 Jan 2016 01:06:22 -0800 (PST) In-Reply-To: References: From: Tim Cuthbertson Date: Mon, 11 Jan 2016 20:06:22 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard wrote: > On 10 January 2016 at 10:15, Tim Cuthbertson wrote: >> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: >>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >>>> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >>>> There is sadly no `safepass-xen` package, and trying to just use >>>> `safepass` results in link errors: >>>> >>>> >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `BF_crypt': >>>> (.text+0x1b97): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `BF_crypt': >>>> (.text+0x2112): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `_crypt_blowfish_rn': >>>> (.text+0x21ea): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `_crypt_gensalt_blowfish_rn': >>>> (.text+0x2575): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>> `_crypt_gensalt_blowfish_rn': >>>> (.text+0x25a6): undefined reference to `__errno_location' >>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >>>> more undefined references to `__errno_location' follow >>>> >>>> >>>> I'm assuming I'd need to customise the build process tp produce an >>>> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >>>> is twofold: >>>> >>>> - I don't really know what the thing I'm doing is. Is mirage-xen a >>>> different architecture? A different ABI? Do C libraries need to be >>>> cross-compiled, or just compiled with particular flags so that they'll >>>> work on xen-minios instead of gnu/linux? >>> >>> C libraries need to be compiled with different headers and flags (in >>> particular, -mno-red-zone). Using libraries compiled for Linux will >>> often appear to work, but may fail when interrupts occur, so the build >>> makes it hard to use them by accident. >>> >>> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone >>> and the OCaml ABI is the same). >>> >>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >>>> mainly with particular CFLAGS >>>> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >>> >>> It's using pkg-config to get the important flags. The others are >>> optimisations (except -fno-builtin, which is either not needed or >>> should be supplied by Mini-OS). >>> >>>> while gmp looks like a full cross-compilation using `--target` (and >>>> then does some other sneaky things). >>>> >>>> safepass uses OASIS for its build system, which doesn't seem to have >>>> any cross-compilation functionality built in as far as I could tell. >>>> Can anyone give me pointers on what I'd need to do to safepass' build >>>> scripts to get this working in mirage-xen, or at the least some >>>> clarification on why it doesn't work as-is and how cross compilation >>>> works for C libraries used in mirage-xen? >>>> >>>> [0]: https://github.com/timbertson/passe >>> >>> The io-page library provides a fairly simple template: >>> >>> https://github.com/mirage/io-page/blob/master/_oasis >>> >>> It builds io_page_unix and io_page_xen libraries. The C flags are >>> added to the main META file with: >>> >>> XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" >>> >>> There's a command to get the Xen flags: >>> >>> PostConfCommand: ocaml postconf.ml >>> >>> The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the >>> Unix one (you need a separate file because OASIS can't compile the >>> same source path with different flags). >> >> Thanks, Thomas. - that helps quite a lot >> >> I think I've followed the same pattern now, but still haven't been >> able to get safepass building. >> >> I'm using the following for CCOpt: >> >> `pkg-config --cflags --static mirage-xen-ocaml` >> >> Now the linking phase fails with: >> >> + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o >> src/bcrypt_stub.o >> ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 >> section .tbss mismatches non-TLS reference in src/crypt_blowfish.o >> /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value >> collect2: error: ld returned 1 exit status >> Command exited with code 2. >> E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a >> src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa >> src/safepass.a src/safepass.cmxs -tag debug' terminated with error >> code 10") > > Try running it as "ocamlfind ocamlmklib -verbose" to see what commands > it's actually using. For io-page, I get: > > $ ocamlfind ocamlmklib -verbose -o lib/io_page_xen_stubs > lib/stub_alloc_pages_xen.o > Effective set of compiler predicates: autolink,byte,native > + ocamlmklib -ocamlc ocamlc.opt -ocamlopt ocamlopt.opt -verbose -o > lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o > + gcc -shared -o lib/dllio_page_xen_stubs.so lib/stub_alloc_pages_xen.o > + ar rc lib/libio_page_xen_stubs.a lib/stub_alloc_pages_xen.o; ranlib > lib/libio_page_xen_stubs.a > > So it doesn't seem to be using ld at all, just ar. Tracing it with strace, that `gcc -shared` process ends up invoking `ld` internally. I tried running ocamlmklib with the `-failsafe` option, and it does continue past this and produce the static .a library using `ar`. But if I try and put that flag into the larger build it doesn't get much further, because it hits the same issue when creating src/safepass.cmxs: + ocamlfind ocamlopt -shared -I src src/safepass.cmxa src/bcrypt.cmx -o src/safepass.cmxs ld: errno: TLS definition in libc.so.6 section .tbss mismatches non-TLS reference in src/libsafepass_stubs.a(crypt_blowfish.o) libc.so.6: could not read symbols: Bad value collect2: error: ld returned 1 exit status >> This seems to be something special about errno being thread-local in >> glibc. Googling turns up a lot of advice on fixing this problem, but >> all of it assumes you're just building on linux for linux. >> bcrypt_stubs.c does , which I believe is being provided by >> minios-xen-0.8/include/minios-xen/errno.h. >> >> However, at link time I don't know where errno is supposed to come >> from. It seems to be coming from glibc, but shouldn't it be coming >> from minios instead given that's where the errno header comes from? I >> poked around with `nm` in minios' built files but couldn't find >> anything that actually defined errno. > > It's from mirage-xen: > > https://github.com/mirage/mirage-platform/blob/c035439de703edbfdd096044afdbab85f4cbf61f/bindings/main.c#L30 Which compiled libraries does that end up in though? I tried `nm`-ing all the built files from mirage-{xen,xen-posix,xen-ocaml} with: $ find /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4 /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4 /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3 -type f -exec bash -c 'if nm {} 2>/dev/null | grep -q errno; then echo {}; nm {} | grep errno; fi' \; /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4/lib/mirage-xen-ocaml/libxenasmrun.a U errno U errno U errno U errno /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4/lib/mirage-xen-posix/libxenposix.a U errno 0000000000000e4a T __h_errno_location /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3/lib/mirage-xen/libxencamlbindings.a 0000000000000004 C errno So there are only .a files (which ld ignores when creating a shared library, doesn't it?), and only libxencamlbindings actually defines it (the others just reference it), which doesn't seem like a library I'd necessarily need to link against. I don't know if mirage-xen actually makes use of .so libraries, as I've only seen it produce static executables. But even if it doesn't need them, I'd need to somehow tell oasis not to build shared versions of safepass (both the .so and the .cmxs). >> -- other things I've tried: >> >> 1) I tried using `pkg-config --cflags mirage-xen-ocaml` for CCLib, >> however `ocamlfind ocamlmklib` didn't seem to like that - it didn't >> understand "-m elf_x86_64" nor >> "-T/nix/store/<...>-minios-xen-0.8/lib/minios-xen/libminios.lds" >> >> 2) I notice that minios-xen/errno.h has: >> >> #ifdef HAVE_LIBC >> #include >> extern int errno; >> #define ERRNO >> #define errno (get_current()->reent._errno) >> #endif >> >> So just to see what happened, I tried adding -DHAVE_LIBC. But then I >> get errors because sys/reent.h can't be found, so that's probably not >> a useful path to explore. >> >> Any advice where to go from here? >> >> Thanks, >> - Tim. > > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 11 10:49:13 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 11 Jan 2016 10:49:13 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIa24-0008GU-5T; Mon, 11 Jan 2016 10:49:04 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIa22-0008Fo-IT for mirageos-devel@lists.xenproject.org; Mon, 11 Jan 2016 10:49:02 +0000 Received: from [85.158.137.68] by server-2.bemta-3.messagelabs.com id E2/29-21201-D9883965; Mon, 11 Jan 2016 10:49:01 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-8.tower-31.messagelabs.com!1452509339!15170665!1 X-Originating-IP: [209.85.213.48] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 38867 invoked from network); 11 Jan 2016 10:49:00 -0000 Received: from mail-vk0-f48.google.com (HELO mail-vk0-f48.google.com) (209.85.213.48) by server-8.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 11 Jan 2016 10:49:00 -0000 Received: by mail-vk0-f48.google.com with SMTP id k1so221848514vkb.2 for ; Mon, 11 Jan 2016 02:49:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=scOGQ7nHQVW1wcmCA/GZ6kZk6Ov4gT8fUtBeE0fara0=; b=kRVFiPfMf034b2q6lF0iv5A+hM2NJusrQcDJBEck5HVjatrNmPZeXdxMSgRsVX1OBo 4vwuIsTmZ9Ei5MAwL5eOn/edwn2LkpUBYQCWGsuaaEBTp3DWUSwoyMdhJ/jsMdCl3e6e yGMt5ruJz25Um4RjzquIfNepGlqZBNZkw5F0MCEc27b1fA/TDG4q85HNFzhqtgJGB0nE hpuMdIRCtUTQHrEM8/QLU3gvJUaKVMf+zsy7N/pnHh3KVpNEMPWGU1Ej/54gluPVUkZV PRcaNHDXdzNTJtxtEcrJuZ79y/wtKOQ4ynpD7b6wkxbXSXeEUEQnAJNJKV66oplGw0fy yuVw== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr89663391vki.41.1452509338872; Mon, 11 Jan 2016 02:48:58 -0800 (PST) Received: by 10.31.128.84 with HTTP; Mon, 11 Jan 2016 02:48:58 -0800 (PST) In-Reply-To: References: Date: Mon, 11 Jan 2016 10:48:58 +0000 Message-ID: From: Thomas Leonard To: Tim Cuthbertson Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 11 January 2016 at 09:06, Tim Cuthbertson wrote: > On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard wrote: >> On 10 January 2016 at 10:15, Tim Cuthbertson wrote: >>> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: >>>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >>>>> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >>>>> There is sadly no `safepass-xen` package, and trying to just use >>>>> `safepass` results in link errors: >>>>> >>>>> >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `BF_crypt': >>>>> (.text+0x1b97): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `BF_crypt': >>>>> (.text+0x2112): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `_crypt_blowfish_rn': >>>>> (.text+0x21ea): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `_crypt_gensalt_blowfish_rn': >>>>> (.text+0x2575): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `_crypt_gensalt_blowfish_rn': >>>>> (.text+0x25a6): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >>>>> more undefined references to `__errno_location' follow >>>>> >>>>> >>>>> I'm assuming I'd need to customise the build process tp produce an >>>>> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >>>>> is twofold: >>>>> >>>>> - I don't really know what the thing I'm doing is. Is mirage-xen a >>>>> different architecture? A different ABI? Do C libraries need to be >>>>> cross-compiled, or just compiled with particular flags so that they'll >>>>> work on xen-minios instead of gnu/linux? >>>> >>>> C libraries need to be compiled with different headers and flags (in >>>> particular, -mno-red-zone). Using libraries compiled for Linux will >>>> often appear to work, but may fail when interrupts occur, so the build >>>> makes it hard to use them by accident. >>>> >>>> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone >>>> and the OCaml ABI is the same). >>>> >>>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >>>>> mainly with particular CFLAGS >>>>> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >>>> >>>> It's using pkg-config to get the important flags. The others are >>>> optimisations (except -fno-builtin, which is either not needed or >>>> should be supplied by Mini-OS). >>>> >>>>> while gmp looks like a full cross-compilation using `--target` (and >>>>> then does some other sneaky things). >>>>> >>>>> safepass uses OASIS for its build system, which doesn't seem to have >>>>> any cross-compilation functionality built in as far as I could tell. >>>>> Can anyone give me pointers on what I'd need to do to safepass' build >>>>> scripts to get this working in mirage-xen, or at the least some >>>>> clarification on why it doesn't work as-is and how cross compilation >>>>> works for C libraries used in mirage-xen? >>>>> >>>>> [0]: https://github.com/timbertson/passe >>>> >>>> The io-page library provides a fairly simple template: >>>> >>>> https://github.com/mirage/io-page/blob/master/_oasis >>>> >>>> It builds io_page_unix and io_page_xen libraries. The C flags are >>>> added to the main META file with: >>>> >>>> XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" >>>> >>>> There's a command to get the Xen flags: >>>> >>>> PostConfCommand: ocaml postconf.ml >>>> >>>> The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the >>>> Unix one (you need a separate file because OASIS can't compile the >>>> same source path with different flags). >>> >>> Thanks, Thomas. - that helps quite a lot >>> >>> I think I've followed the same pattern now, but still haven't been >>> able to get safepass building. >>> >>> I'm using the following for CCOpt: >>> >>> `pkg-config --cflags --static mirage-xen-ocaml` >>> >>> Now the linking phase fails with: >>> >>> + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o >>> src/bcrypt_stub.o >>> ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 >>> section .tbss mismatches non-TLS reference in src/crypt_blowfish.o >>> /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value >>> collect2: error: ld returned 1 exit status >>> Command exited with code 2. >>> E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a >>> src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa >>> src/safepass.a src/safepass.cmxs -tag debug' terminated with error >>> code 10") >> >> Try running it as "ocamlfind ocamlmklib -verbose" to see what commands >> it's actually using. For io-page, I get: >> >> $ ocamlfind ocamlmklib -verbose -o lib/io_page_xen_stubs >> lib/stub_alloc_pages_xen.o >> Effective set of compiler predicates: autolink,byte,native >> + ocamlmklib -ocamlc ocamlc.opt -ocamlopt ocamlopt.opt -verbose -o >> lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o >> + gcc -shared -o lib/dllio_page_xen_stubs.so lib/stub_alloc_pages_xen.o >> + ar rc lib/libio_page_xen_stubs.a lib/stub_alloc_pages_xen.o; ranlib >> lib/libio_page_xen_stubs.a >> >> So it doesn't seem to be using ld at all, just ar. > > Tracing it with strace, that `gcc -shared` process ends up invoking > `ld` internally. > > I tried running ocamlmklib with the `-failsafe` option, and it does > continue past this and produce the static .a library using `ar`. But > if I try and put that flag into the larger build it doesn't get much > further, because it hits the same issue when creating > src/safepass.cmxs: > > + ocamlfind ocamlopt -shared -I src src/safepass.cmxa src/bcrypt.cmx > -o src/safepass.cmxs > ld: errno: TLS definition in libc.so.6 section .tbss mismatches > non-TLS reference in src/libsafepass_stubs.a(crypt_blowfish.o) > libc.so.6: could not read symbols: Bad value > collect2: error: ld returned 1 exit status > >>> This seems to be something special about errno being thread-local in >>> glibc. Googling turns up a lot of advice on fixing this problem, but >>> all of it assumes you're just building on linux for linux. >>> bcrypt_stubs.c does , which I believe is being provided by >>> minios-xen-0.8/include/minios-xen/errno.h. >>> >>> However, at link time I don't know where errno is supposed to come >>> from. It seems to be coming from glibc, but shouldn't it be coming >>> from minios instead given that's where the errno header comes from? I >>> poked around with `nm` in minios' built files but couldn't find >>> anything that actually defined errno. >> >> It's from mirage-xen: >> >> https://github.com/mirage/mirage-platform/blob/c035439de703edbfdd096044afdbab85f4cbf61f/bindings/main.c#L30 > > Which compiled libraries does that end up in though? > > I tried `nm`-ing all the built files from mirage-{xen,xen-posix,xen-ocaml} with: > > $ find /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4 > /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4 > /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3 -type f > -exec bash -c 'if nm {} 2>/dev/null | grep -q errno; then echo {}; nm > {} | grep errno; fi' \; > /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4/lib/mirage-xen-ocaml/libxenasmrun.a > U errno > U errno > U errno > U errno > /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4/lib/mirage-xen-posix/libxenposix.a > U errno > 0000000000000e4a T __h_errno_location > /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3/lib/mirage-xen/libxencamlbindings.a > 0000000000000004 C errno This is it (C = Common). > So there are only .a files (which ld ignores when creating a shared > library, doesn't it?), and only libxencamlbindings actually defines it > (the others just reference it), which doesn't seem like a library I'd > necessarily need to link against. > > I don't know if mirage-xen actually makes use of .so libraries, as > I've only seen it produce static executables. But even if it doesn't > need them, I'd need to somehow tell oasis not to build shared versions > of safepass (both the .so and the .cmxs). Correct: Mirage on Xen does not use shared libraries. I don't know how to prevent them from being built. The easiest option might be to remove the uses of errno from the library (it doesn't look like the OCaml bindings do anything with it anyway). >>> -- other things I've tried: >>> >>> 1) I tried using `pkg-config --cflags mirage-xen-ocaml` for CCLib, >>> however `ocamlfind ocamlmklib` didn't seem to like that - it didn't >>> understand "-m elf_x86_64" nor >>> "-T/nix/store/<...>-minios-xen-0.8/lib/minios-xen/libminios.lds" >>> >>> 2) I notice that minios-xen/errno.h has: >>> >>> #ifdef HAVE_LIBC >>> #include >>> extern int errno; >>> #define ERRNO >>> #define errno (get_current()->reent._errno) >>> #endif >>> >>> So just to see what happened, I tried adding -DHAVE_LIBC. But then I >>> get errors because sys/reent.h can't be found, so that's probably not >>> a useful path to explore. >>> >>> Any advice where to go from here? >>> >>> Thanks, >>> - Tim. >> >> >> >> -- >> Dr Thomas Leonard http://roscidus.com/blog/ >> GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 11 10:49:13 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 11 Jan 2016 10:49:13 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIa24-0008GU-5T; Mon, 11 Jan 2016 10:49:04 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIa22-0008Fo-IT for mirageos-devel@lists.xenproject.org; Mon, 11 Jan 2016 10:49:02 +0000 Received: from [85.158.137.68] by server-2.bemta-3.messagelabs.com id E2/29-21201-D9883965; Mon, 11 Jan 2016 10:49:01 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-8.tower-31.messagelabs.com!1452509339!15170665!1 X-Originating-IP: [209.85.213.48] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 38867 invoked from network); 11 Jan 2016 10:49:00 -0000 Received: from mail-vk0-f48.google.com (HELO mail-vk0-f48.google.com) (209.85.213.48) by server-8.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 11 Jan 2016 10:49:00 -0000 Received: by mail-vk0-f48.google.com with SMTP id k1so221848514vkb.2 for ; Mon, 11 Jan 2016 02:49:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=scOGQ7nHQVW1wcmCA/GZ6kZk6Ov4gT8fUtBeE0fara0=; b=kRVFiPfMf034b2q6lF0iv5A+hM2NJusrQcDJBEck5HVjatrNmPZeXdxMSgRsVX1OBo 4vwuIsTmZ9Ei5MAwL5eOn/edwn2LkpUBYQCWGsuaaEBTp3DWUSwoyMdhJ/jsMdCl3e6e yGMt5ruJz25Um4RjzquIfNepGlqZBNZkw5F0MCEc27b1fA/TDG4q85HNFzhqtgJGB0nE hpuMdIRCtUTQHrEM8/QLU3gvJUaKVMf+zsy7N/pnHh3KVpNEMPWGU1Ej/54gluPVUkZV PRcaNHDXdzNTJtxtEcrJuZ79y/wtKOQ4ynpD7b6wkxbXSXeEUEQnAJNJKV66oplGw0fy yuVw== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr89663391vki.41.1452509338872; Mon, 11 Jan 2016 02:48:58 -0800 (PST) Received: by 10.31.128.84 with HTTP; Mon, 11 Jan 2016 02:48:58 -0800 (PST) In-Reply-To: References: Date: Mon, 11 Jan 2016 10:48:58 +0000 Message-ID: From: Thomas Leonard To: Tim Cuthbertson Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 11 January 2016 at 09:06, Tim Cuthbertson wrote: > On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard wrote: >> On 10 January 2016 at 10:15, Tim Cuthbertson wrote: >>> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: >>>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >>>>> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >>>>> There is sadly no `safepass-xen` package, and trying to just use >>>>> `safepass` results in link errors: >>>>> >>>>> >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `BF_crypt': >>>>> (.text+0x1b97): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `BF_crypt': >>>>> (.text+0x2112): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `_crypt_blowfish_rn': >>>>> (.text+0x21ea): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `_crypt_gensalt_blowfish_rn': >>>>> (.text+0x2575): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>> `_crypt_gensalt_blowfish_rn': >>>>> (.text+0x25a6): undefined reference to `__errno_location' >>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >>>>> more undefined references to `__errno_location' follow >>>>> >>>>> >>>>> I'm assuming I'd need to customise the build process tp produce an >>>>> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >>>>> is twofold: >>>>> >>>>> - I don't really know what the thing I'm doing is. Is mirage-xen a >>>>> different architecture? A different ABI? Do C libraries need to be >>>>> cross-compiled, or just compiled with particular flags so that they'll >>>>> work on xen-minios instead of gnu/linux? >>>> >>>> C libraries need to be compiled with different headers and flags (in >>>> particular, -mno-red-zone). Using libraries compiled for Linux will >>>> often appear to work, but may fail when interrupts occur, so the build >>>> makes it hard to use them by accident. >>>> >>>> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone >>>> and the OCaml ABI is the same). >>>> >>>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >>>>> mainly with particular CFLAGS >>>>> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >>>> >>>> It's using pkg-config to get the important flags. The others are >>>> optimisations (except -fno-builtin, which is either not needed or >>>> should be supplied by Mini-OS). >>>> >>>>> while gmp looks like a full cross-compilation using `--target` (and >>>>> then does some other sneaky things). >>>>> >>>>> safepass uses OASIS for its build system, which doesn't seem to have >>>>> any cross-compilation functionality built in as far as I could tell. >>>>> Can anyone give me pointers on what I'd need to do to safepass' build >>>>> scripts to get this working in mirage-xen, or at the least some >>>>> clarification on why it doesn't work as-is and how cross compilation >>>>> works for C libraries used in mirage-xen? >>>>> >>>>> [0]: https://github.com/timbertson/passe >>>> >>>> The io-page library provides a fairly simple template: >>>> >>>> https://github.com/mirage/io-page/blob/master/_oasis >>>> >>>> It builds io_page_unix and io_page_xen libraries. The C flags are >>>> added to the main META file with: >>>> >>>> XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" >>>> >>>> There's a command to get the Xen flags: >>>> >>>> PostConfCommand: ocaml postconf.ml >>>> >>>> The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the >>>> Unix one (you need a separate file because OASIS can't compile the >>>> same source path with different flags). >>> >>> Thanks, Thomas. - that helps quite a lot >>> >>> I think I've followed the same pattern now, but still haven't been >>> able to get safepass building. >>> >>> I'm using the following for CCOpt: >>> >>> `pkg-config --cflags --static mirage-xen-ocaml` >>> >>> Now the linking phase fails with: >>> >>> + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o >>> src/bcrypt_stub.o >>> ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 >>> section .tbss mismatches non-TLS reference in src/crypt_blowfish.o >>> /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value >>> collect2: error: ld returned 1 exit status >>> Command exited with code 2. >>> E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a >>> src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa >>> src/safepass.a src/safepass.cmxs -tag debug' terminated with error >>> code 10") >> >> Try running it as "ocamlfind ocamlmklib -verbose" to see what commands >> it's actually using. For io-page, I get: >> >> $ ocamlfind ocamlmklib -verbose -o lib/io_page_xen_stubs >> lib/stub_alloc_pages_xen.o >> Effective set of compiler predicates: autolink,byte,native >> + ocamlmklib -ocamlc ocamlc.opt -ocamlopt ocamlopt.opt -verbose -o >> lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o >> + gcc -shared -o lib/dllio_page_xen_stubs.so lib/stub_alloc_pages_xen.o >> + ar rc lib/libio_page_xen_stubs.a lib/stub_alloc_pages_xen.o; ranlib >> lib/libio_page_xen_stubs.a >> >> So it doesn't seem to be using ld at all, just ar. > > Tracing it with strace, that `gcc -shared` process ends up invoking > `ld` internally. > > I tried running ocamlmklib with the `-failsafe` option, and it does > continue past this and produce the static .a library using `ar`. But > if I try and put that flag into the larger build it doesn't get much > further, because it hits the same issue when creating > src/safepass.cmxs: > > + ocamlfind ocamlopt -shared -I src src/safepass.cmxa src/bcrypt.cmx > -o src/safepass.cmxs > ld: errno: TLS definition in libc.so.6 section .tbss mismatches > non-TLS reference in src/libsafepass_stubs.a(crypt_blowfish.o) > libc.so.6: could not read symbols: Bad value > collect2: error: ld returned 1 exit status > >>> This seems to be something special about errno being thread-local in >>> glibc. Googling turns up a lot of advice on fixing this problem, but >>> all of it assumes you're just building on linux for linux. >>> bcrypt_stubs.c does , which I believe is being provided by >>> minios-xen-0.8/include/minios-xen/errno.h. >>> >>> However, at link time I don't know where errno is supposed to come >>> from. It seems to be coming from glibc, but shouldn't it be coming >>> from minios instead given that's where the errno header comes from? I >>> poked around with `nm` in minios' built files but couldn't find >>> anything that actually defined errno. >> >> It's from mirage-xen: >> >> https://github.com/mirage/mirage-platform/blob/c035439de703edbfdd096044afdbab85f4cbf61f/bindings/main.c#L30 > > Which compiled libraries does that end up in though? > > I tried `nm`-ing all the built files from mirage-{xen,xen-posix,xen-ocaml} with: > > $ find /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4 > /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4 > /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3 -type f > -exec bash -c 'if nm {} 2>/dev/null | grep -q errno; then echo {}; nm > {} | grep errno; fi' \; > /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4/lib/mirage-xen-ocaml/libxenasmrun.a > U errno > U errno > U errno > U errno > /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4/lib/mirage-xen-posix/libxenposix.a > U errno > 0000000000000e4a T __h_errno_location > /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3/lib/mirage-xen/libxencamlbindings.a > 0000000000000004 C errno This is it (C = Common). > So there are only .a files (which ld ignores when creating a shared > library, doesn't it?), and only libxencamlbindings actually defines it > (the others just reference it), which doesn't seem like a library I'd > necessarily need to link against. > > I don't know if mirage-xen actually makes use of .so libraries, as > I've only seen it produce static executables. But even if it doesn't > need them, I'd need to somehow tell oasis not to build shared versions > of safepass (both the .so and the .cmxs). Correct: Mirage on Xen does not use shared libraries. I don't know how to prevent them from being built. The easiest option might be to remove the uses of errno from the library (it doesn't look like the OCaml bindings do anything with it anyway). >>> -- other things I've tried: >>> >>> 1) I tried using `pkg-config --cflags mirage-xen-ocaml` for CCLib, >>> however `ocamlfind ocamlmklib` didn't seem to like that - it didn't >>> understand "-m elf_x86_64" nor >>> "-T/nix/store/<...>-minios-xen-0.8/lib/minios-xen/libminios.lds" >>> >>> 2) I notice that minios-xen/errno.h has: >>> >>> #ifdef HAVE_LIBC >>> #include >>> extern int errno; >>> #define ERRNO >>> #define errno (get_current()->reent._errno) >>> #endif >>> >>> So just to see what happened, I tried adding -DHAVE_LIBC. But then I >>> get errors because sys/reent.h can't be found, so that's probably not >>> a useful path to explore. >>> >>> Any advice where to go from here? >>> >>> Thanks, >>> - Tim. >> >> >> >> -- >> Dr Thomas Leonard http://roscidus.com/blog/ >> GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 11 14:08:47 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 11 Jan 2016 14:08:47 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aId9D-0005WT-Ej; Mon, 11 Jan 2016 14:08:39 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aId9B-0005WA-U8 for mirageos-devel@lists.xenproject.org; Mon, 11 Jan 2016 14:08:38 +0000 Received: from [85.158.143.35] by server-1.bemta-4.messagelabs.com id AB/93-09708-567B3965; Mon, 11 Jan 2016 14:08:37 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-9.tower-21.messagelabs.com!1452521315!9447031!1 X-Originating-IP: [209.85.213.42] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 13033 invoked from network); 11 Jan 2016 14:08:36 -0000 Received: from mail-vk0-f42.google.com (HELO mail-vk0-f42.google.com) (209.85.213.42) by server-9.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 11 Jan 2016 14:08:36 -0000 Received: by mail-vk0-f42.google.com with SMTP id a123so193864981vkh.1 for ; Mon, 11 Jan 2016 06:08:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=TdTZF8Z998zbfqcRvGjdbt2uEFxW4546MD/Us3UL+5s=; b=vC19vhjCRWoTT5UR2ydhkVBqQc2GRP7BQTFQY3KgFdyK7/Meavzo+iJrOkQn7FkE2O NX7QcHCFEwyBTijM0L+TJFCG9/rUBw+/OZvy4hsrLLjpC3D8L5PcNlnDJ3E73Bpt/RtH NZIRUcjaeSJJ9rk9tjx9ckVsIRbApiSl+wOBpHvzf5dGxPfJtJj6XM8LBEwTkjSyRm7p PcLbl217bHXDjyUqtySH8QbKwVrbzsbKy+Re8q5LjRVN7uBcJCulsHlab2LP4CFst1h0 zpsxM00cSPy+YVyLxZKMjWU4KMQiEdCFznArwWEzMOJTGroWiwzslWfF/kf0M//W7wAz aPeQ== MIME-Version: 1.0 X-Received: by 10.31.47.200 with SMTP id v191mr93135349vkv.116.1452521314888; Mon, 11 Jan 2016 06:08:34 -0800 (PST) Received: by 10.31.128.84 with HTTP; Mon, 11 Jan 2016 06:08:34 -0800 (PST) In-Reply-To: References: Date: Mon, 11 Jan 2016 14:08:34 +0000 Message-ID: From: Thomas Leonard To: "M. O." Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Changes in Irmin 0.10.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 10 January 2016 at 16:50, M. O. wrote: > Thanks, and how to unwatch a key that is under watch by I.watch_key? The Irmin API is documented in irmin.mli, e.g. https://github.com/mirage/irmin/blob/master/lib/irmin.mli#L533 >> Hi, >> >> Questions regarding changes in Irmin 0.10.0: >> >> 1- Is there any equivalence for "Irmin.watch_tags" in the previous >> releases? > > Irmin.Repo.watch_branches > >> 2- This is somehow related to the first question, that is how to create a >> store similar to "Store.of_head config task head" (for instance, from the >> heads that watch_tag sends to the callback function) in the older >> versions. > > of_head is now of_commit_id. > -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 11 14:08:47 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 11 Jan 2016 14:08:47 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aId9D-0005WT-Ej; Mon, 11 Jan 2016 14:08:39 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aId9B-0005WA-U8 for mirageos-devel@lists.xenproject.org; Mon, 11 Jan 2016 14:08:38 +0000 Received: from [85.158.143.35] by server-1.bemta-4.messagelabs.com id AB/93-09708-567B3965; Mon, 11 Jan 2016 14:08:37 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-9.tower-21.messagelabs.com!1452521315!9447031!1 X-Originating-IP: [209.85.213.42] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 13033 invoked from network); 11 Jan 2016 14:08:36 -0000 Received: from mail-vk0-f42.google.com (HELO mail-vk0-f42.google.com) (209.85.213.42) by server-9.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 11 Jan 2016 14:08:36 -0000 Received: by mail-vk0-f42.google.com with SMTP id a123so193864981vkh.1 for ; Mon, 11 Jan 2016 06:08:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=TdTZF8Z998zbfqcRvGjdbt2uEFxW4546MD/Us3UL+5s=; b=vC19vhjCRWoTT5UR2ydhkVBqQc2GRP7BQTFQY3KgFdyK7/Meavzo+iJrOkQn7FkE2O NX7QcHCFEwyBTijM0L+TJFCG9/rUBw+/OZvy4hsrLLjpC3D8L5PcNlnDJ3E73Bpt/RtH NZIRUcjaeSJJ9rk9tjx9ckVsIRbApiSl+wOBpHvzf5dGxPfJtJj6XM8LBEwTkjSyRm7p PcLbl217bHXDjyUqtySH8QbKwVrbzsbKy+Re8q5LjRVN7uBcJCulsHlab2LP4CFst1h0 zpsxM00cSPy+YVyLxZKMjWU4KMQiEdCFznArwWEzMOJTGroWiwzslWfF/kf0M//W7wAz aPeQ== MIME-Version: 1.0 X-Received: by 10.31.47.200 with SMTP id v191mr93135349vkv.116.1452521314888; Mon, 11 Jan 2016 06:08:34 -0800 (PST) Received: by 10.31.128.84 with HTTP; Mon, 11 Jan 2016 06:08:34 -0800 (PST) In-Reply-To: References: Date: Mon, 11 Jan 2016 14:08:34 +0000 Message-ID: From: Thomas Leonard To: "M. O." Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Changes in Irmin 0.10.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 10 January 2016 at 16:50, M. O. wrote: > Thanks, and how to unwatch a key that is under watch by I.watch_key? The Irmin API is documented in irmin.mli, e.g. https://github.com/mirage/irmin/blob/master/lib/irmin.mli#L533 >> Hi, >> >> Questions regarding changes in Irmin 0.10.0: >> >> 1- Is there any equivalence for "Irmin.watch_tags" in the previous >> releases? > > Irmin.Repo.watch_branches > >> 2- This is somehow related to the first question, that is how to create a >> store similar to "Store.of_head config task head" (for instance, from the >> heads that watch_tag sends to the callback function) in the older >> versions. > > of_head is now of_commit_id. > -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 11 15:07:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 11 Jan 2016 15:07:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIe3t-00006O-Pd; Mon, 11 Jan 2016 15:07:14 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIe3r-000065-7O for mirageos-devel@lists.xenproject.org; Mon, 11 Jan 2016 15:07:11 +0000 Received: from [85.158.143.35] by server-3.bemta-4.messagelabs.com id 88/02-31122-E15C3965; Mon, 11 Jan 2016 15:07:10 +0000 X-Env-Sender: meta@gmx.com X-Msg-Ref: server-3.tower-21.messagelabs.com!1452524828!9034926!1 X-Originating-IP: [212.227.15.19] X-SpamReason: No, hits=1.0 required=7.0 tests=sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE1LjE5ID0+IDI1MjI5\n,sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE1LjE5ID0+IDI1MjI5\n,HTML_40_50,HTML_MESSAGE, MIME_HTML_ONLY X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 54084 invoked from network); 11 Jan 2016 15:07:09 -0000 Received: from mout.gmx.net (HELO mout.gmx.net) (212.227.15.19) by server-3.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 11 Jan 2016 15:07:09 -0000 Received: from [128.232.109.3] by 3capp-mailcom-bs07.server.lan (via HTTP); Mon, 11 Jan 2016 16:07:06 +0100 MIME-Version: 1.0 Message-ID: From: "M. O." To: "Thomas Leonard" Date: Mon, 11 Jan 2016 16:07:06 +0100 Importance: normal Sensitivity: Normal In-Reply-To: References: , X-UI-Message-Type: mail X-Priority: 3 X-Provags-ID: V03:K0:9mydfX+YqcVpYegRcQyit406+zQrhYFX4dYk5GvwpEr Vc+fq8LOthc7G4HQedxDjscm3Pph7dLTNkbcYcbj53SsaAoXXP xwUTsr0k3kQdSksSlkMGvTCYSGyp7JGCdmpxFxc7g2OfWHBiEq VvMZyhltjvkvkhQEhlXeluXY7FzCDKFfYsiKmSqJX/DExHO6CV uqN1A+wA7/DNg3d9fhmUdQHoYeraeEshtlY20D2iOVTFbJydTb wEh6YFnZicVkiunmLz7pttjQ4fF1iwiIicK1TZSzKXgZ2r0bzX nTyjWHOPo77TF56Fk1CrIbXxyEx X-UI-Out-Filterresults: notjunk:1;V01:K0:w5J3ER4RkI0=:E8mgznxmwA7f3Ranx57LqH t7cLxvVVIW4kpx314IXnDuETKIDf0faRDMiZlKH2zaiB5bC2KcguGGOm5NaMFJYqRonwM6lrB I9hWJ3ICCeMB3o1f0kRUQmpgOkjYSzdtsRYJU13w1+ncCgXWZXnssQOvkSogMwzaNDdGwqQ/M qje3gOA9N0Ag4rV2llc3jocgjLr6/34KHSd64mH7KIRtxob9rwa9VfbWPknZ+y/YBZfYS2QdV Sslg7yyDcP0iCwbclKFuaNr6Gh2fMB9mUrG9Gm+jSHnZS4scLUtHnr1FhxGjwu08Ia4JCgeOr UdQ8bSzriYIHs/T+TF6uXYPaxvRw7XQKXBHGLSUfJUZGGQ13ZFcoMJXjNKQnLpIBHhzDlFd1q xeNZ5WGETETXFTP2q2DMpYEdeV/thzUlEkspdxkTszSPWIZTLI5xc1odYyfdjxqE0AlRIa0+Q zis7VFBlqw== Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Changes in Irmin 0.10.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============7314523183328300863==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============7314523183328300863== Content-Type: text/html; charset=UTF-8
I understand. Irmin.unwatch appears to be Unbounded when building (while Irmin.watch_key works). Doesn't unwatch need to be exposed in module BC?
 
On 10 January 2016 at 16:50, M. O. <meta@gmx.com> wrote:
> Thanks, and how to unwatch a key that is under watch by I.watch_key?

The Irmin API is documented in irmin.mli, e.g.

https://github.com/mirage/irmin/blob/master/lib/irmin.mli#L533


>> Hi,
>>
>> Questions regarding changes in Irmin 0.10.0:
>>
>> 1- Is there any equivalence for "Irmin.watch_tags" in the previous
>> releases?
>
> Irmin.Repo.watch_branches
>
>> 2- This is somehow related to the first question, that is how to create a
>> store similar to "Store.of_head config task head" (for instance, from the
>> heads that watch_tag sends to the callback function) in the older
>> versions.
>
> of_head is now of_commit_id.
>



--
Dr Thomas Leonard http://roscidus.com/blog/
GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA
--===============7314523183328300863== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============7314523183328300863==-- From mirageos-devel-bounces@lists.xenproject.org Mon Jan 11 15:07:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 11 Jan 2016 15:07:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIe3t-00006O-Pd; Mon, 11 Jan 2016 15:07:14 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIe3r-000065-7O for mirageos-devel@lists.xenproject.org; Mon, 11 Jan 2016 15:07:11 +0000 Received: from [85.158.143.35] by server-3.bemta-4.messagelabs.com id 88/02-31122-E15C3965; Mon, 11 Jan 2016 15:07:10 +0000 X-Env-Sender: meta@gmx.com X-Msg-Ref: server-3.tower-21.messagelabs.com!1452524828!9034926!1 X-Originating-IP: [212.227.15.19] X-SpamReason: No, hits=1.0 required=7.0 tests=sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE1LjE5ID0+IDI1MjI5\n,sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE1LjE5ID0+IDI1MjI5\n,HTML_40_50,HTML_MESSAGE, MIME_HTML_ONLY X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 54084 invoked from network); 11 Jan 2016 15:07:09 -0000 Received: from mout.gmx.net (HELO mout.gmx.net) (212.227.15.19) by server-3.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 11 Jan 2016 15:07:09 -0000 Received: from [128.232.109.3] by 3capp-mailcom-bs07.server.lan (via HTTP); Mon, 11 Jan 2016 16:07:06 +0100 MIME-Version: 1.0 Message-ID: From: "M. O." To: "Thomas Leonard" Date: Mon, 11 Jan 2016 16:07:06 +0100 Importance: normal Sensitivity: Normal In-Reply-To: References: , X-UI-Message-Type: mail X-Priority: 3 X-Provags-ID: V03:K0:9mydfX+YqcVpYegRcQyit406+zQrhYFX4dYk5GvwpEr Vc+fq8LOthc7G4HQedxDjscm3Pph7dLTNkbcYcbj53SsaAoXXP xwUTsr0k3kQdSksSlkMGvTCYSGyp7JGCdmpxFxc7g2OfWHBiEq VvMZyhltjvkvkhQEhlXeluXY7FzCDKFfYsiKmSqJX/DExHO6CV uqN1A+wA7/DNg3d9fhmUdQHoYeraeEshtlY20D2iOVTFbJydTb wEh6YFnZicVkiunmLz7pttjQ4fF1iwiIicK1TZSzKXgZ2r0bzX nTyjWHOPo77TF56Fk1CrIbXxyEx X-UI-Out-Filterresults: notjunk:1;V01:K0:w5J3ER4RkI0=:E8mgznxmwA7f3Ranx57LqH t7cLxvVVIW4kpx314IXnDuETKIDf0faRDMiZlKH2zaiB5bC2KcguGGOm5NaMFJYqRonwM6lrB I9hWJ3ICCeMB3o1f0kRUQmpgOkjYSzdtsRYJU13w1+ncCgXWZXnssQOvkSogMwzaNDdGwqQ/M qje3gOA9N0Ag4rV2llc3jocgjLr6/34KHSd64mH7KIRtxob9rwa9VfbWPknZ+y/YBZfYS2QdV Sslg7yyDcP0iCwbclKFuaNr6Gh2fMB9mUrG9Gm+jSHnZS4scLUtHnr1FhxGjwu08Ia4JCgeOr UdQ8bSzriYIHs/T+TF6uXYPaxvRw7XQKXBHGLSUfJUZGGQ13ZFcoMJXjNKQnLpIBHhzDlFd1q xeNZ5WGETETXFTP2q2DMpYEdeV/thzUlEkspdxkTszSPWIZTLI5xc1odYyfdjxqE0AlRIa0+Q zis7VFBlqw== Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Changes in Irmin 0.10.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============7314523183328300863==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============7314523183328300863== Content-Type: text/html; charset=UTF-8
I understand. Irmin.unwatch appears to be Unbounded when building (while Irmin.watch_key works). Doesn't unwatch need to be exposed in module BC?
 
On 10 January 2016 at 16:50, M. O. <meta@gmx.com> wrote:
> Thanks, and how to unwatch a key that is under watch by I.watch_key?

The Irmin API is documented in irmin.mli, e.g.

https://github.com/mirage/irmin/blob/master/lib/irmin.mli#L533


>> Hi,
>>
>> Questions regarding changes in Irmin 0.10.0:
>>
>> 1- Is there any equivalence for "Irmin.watch_tags" in the previous
>> releases?
>
> Irmin.Repo.watch_branches
>
>> 2- This is somehow related to the first question, that is how to create a
>> store similar to "Store.of_head config task head" (for instance, from the
>> heads that watch_tag sends to the callback function) in the older
>> versions.
>
> of_head is now of_commit_id.
>



--
Dr Thomas Leonard http://roscidus.com/blog/
GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA
--===============7314523183328300863== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============7314523183328300863==-- From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 04:01:44 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 04:01:44 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIq9G-0007j5-Fs; Tue, 12 Jan 2016 04:01:34 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIq97-0007j0-LW for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 04:01:26 +0000 Received: from [85.158.137.68] by server-7.bemta-3.messagelabs.com id 13/D3-23747-49A74965; Tue, 12 Jan 2016 04:01:24 +0000 X-Env-Sender: amc79@cam.ac.uk X-Msg-Ref: server-4.tower-31.messagelabs.com!1452571283!5618639!1 X-Originating-IP: [131.111.8.132] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 7445 invoked from network); 12 Jan 2016 04:01:24 -0000 Received: from ppsw-32.csi.cam.ac.uk (HELO ppsw-32.csi.cam.ac.uk) (131.111.8.132) by server-4.tower-31.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 12 Jan 2016 04:01:24 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from [50.233.46.100] (port=49719 helo=[192.168.202.114]) by ppsw-32.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.156]:25) with esmtpsa (PLAIN:amc79) (TLSv1:ECDHE-RSA-AES256-SHA:256) id 1aIq95-000PUM-0I (Exim 4.86_36-e07b163) for mirageos-devel@lists.xenproject.org (return-path ); Tue, 12 Jan 2016 04:01:23 +0000 From: Amir Chaudhry Message-Id: Date: Mon, 11 Jan 2016 20:01:20 -0800 To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) X-Mailer: Apple Mail (2.2104) Subject: [MirageOS-devel] MirageOS fortnightly call - Wednesday 13th Jan at 4pm GMT X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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[209.85.213.48]) by smtp.gmail.com with ESMTPSA id x71sm13105508vkx.4.2016.01.12.03.48.34 for (version=TLSv1/SSLv3 cipher=OTHER); Tue, 12 Jan 2016 03:48:34 -0800 (PST) Received: by mail-vk0-f48.google.com with SMTP id n1so86746493vkb.3 for ; Tue, 12 Jan 2016 03:48:34 -0800 (PST) X-Received: by 10.31.149.78 with SMTP id x75mr77187255vkd.103.1452599314128; Tue, 12 Jan 2016 03:48:34 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Tue, 12 Jan 2016 03:48:14 -0800 (PST) In-Reply-To: References: From: Tim Cuthbertson Date: Tue, 12 Jan 2016 22:48:14 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Mon, Jan 11, 2016 at 9:48 PM, Thomas Leonard wrote: > On 11 January 2016 at 09:06, Tim Cuthbertson wrote: >> On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard wrote: >>> On 10 January 2016 at 10:15, Tim Cuthbertson wrote: >>>> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: >>>>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >>>>>> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >>>>>> There is sadly no `safepass-xen` package, and trying to just use >>>>>> `safepass` results in link errors: >>>>>> >>>>>> >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `BF_crypt': >>>>>> (.text+0x1b97): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `BF_crypt': >>>>>> (.text+0x2112): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `_crypt_blowfish_rn': >>>>>> (.text+0x21ea): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `_crypt_gensalt_blowfish_rn': >>>>>> (.text+0x2575): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `_crypt_gensalt_blowfish_rn': >>>>>> (.text+0x25a6): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >>>>>> more undefined references to `__errno_location' follow >>>>>> >>>>>> >>>>>> I'm assuming I'd need to customise the build process tp produce an >>>>>> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >>>>>> is twofold: >>>>>> >>>>>> - I don't really know what the thing I'm doing is. Is mirage-xen a >>>>>> different architecture? A different ABI? Do C libraries need to be >>>>>> cross-compiled, or just compiled with particular flags so that they'll >>>>>> work on xen-minios instead of gnu/linux? >>>>> >>>>> C libraries need to be compiled with different headers and flags (in >>>>> particular, -mno-red-zone). Using libraries compiled for Linux will >>>>> often appear to work, but may fail when interrupts occur, so the build >>>>> makes it hard to use them by accident. >>>>> >>>>> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone >>>>> and the OCaml ABI is the same). >>>>> >>>>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >>>>>> mainly with particular CFLAGS >>>>>> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >>>>> >>>>> It's using pkg-config to get the important flags. The others are >>>>> optimisations (except -fno-builtin, which is either not needed or >>>>> should be supplied by Mini-OS). >>>>> >>>>>> while gmp looks like a full cross-compilation using `--target` (and >>>>>> then does some other sneaky things). >>>>>> >>>>>> safepass uses OASIS for its build system, which doesn't seem to have >>>>>> any cross-compilation functionality built in as far as I could tell. >>>>>> Can anyone give me pointers on what I'd need to do to safepass' build >>>>>> scripts to get this working in mirage-xen, or at the least some >>>>>> clarification on why it doesn't work as-is and how cross compilation >>>>>> works for C libraries used in mirage-xen? >>>>>> >>>>>> [0]: https://github.com/timbertson/passe >>>>> >>>>> The io-page library provides a fairly simple template: >>>>> >>>>> https://github.com/mirage/io-page/blob/master/_oasis >>>>> >>>>> It builds io_page_unix and io_page_xen libraries. The C flags are >>>>> added to the main META file with: >>>>> >>>>> XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" >>>>> >>>>> There's a command to get the Xen flags: >>>>> >>>>> PostConfCommand: ocaml postconf.ml >>>>> >>>>> The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the >>>>> Unix one (you need a separate file because OASIS can't compile the >>>>> same source path with different flags). >>>> >>>> Thanks, Thomas. - that helps quite a lot >>>> >>>> I think I've followed the same pattern now, but still haven't been >>>> able to get safepass building. >>>> >>>> I'm using the following for CCOpt: >>>> >>>> `pkg-config --cflags --static mirage-xen-ocaml` >>>> >>>> Now the linking phase fails with: >>>> >>>> + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o >>>> src/bcrypt_stub.o >>>> ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 >>>> section .tbss mismatches non-TLS reference in src/crypt_blowfish.o >>>> /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value >>>> collect2: error: ld returned 1 exit status >>>> Command exited with code 2. >>>> E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a >>>> src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa >>>> src/safepass.a src/safepass.cmxs -tag debug' terminated with error >>>> code 10") >>> >>> Try running it as "ocamlfind ocamlmklib -verbose" to see what commands >>> it's actually using. For io-page, I get: >>> >>> $ ocamlfind ocamlmklib -verbose -o lib/io_page_xen_stubs >>> lib/stub_alloc_pages_xen.o >>> Effective set of compiler predicates: autolink,byte,native >>> + ocamlmklib -ocamlc ocamlc.opt -ocamlopt ocamlopt.opt -verbose -o >>> lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o >>> + gcc -shared -o lib/dllio_page_xen_stubs.so lib/stub_alloc_pages_xen.o >>> + ar rc lib/libio_page_xen_stubs.a lib/stub_alloc_pages_xen.o; ranlib >>> lib/libio_page_xen_stubs.a >>> >>> So it doesn't seem to be using ld at all, just ar. >> >> Tracing it with strace, that `gcc -shared` process ends up invoking >> `ld` internally. >> >> I tried running ocamlmklib with the `-failsafe` option, and it does >> continue past this and produce the static .a library using `ar`. But >> if I try and put that flag into the larger build it doesn't get much >> further, because it hits the same issue when creating >> src/safepass.cmxs: >> >> + ocamlfind ocamlopt -shared -I src src/safepass.cmxa src/bcrypt.cmx >> -o src/safepass.cmxs >> ld: errno: TLS definition in libc.so.6 section .tbss mismatches >> non-TLS reference in src/libsafepass_stubs.a(crypt_blowfish.o) >> libc.so.6: could not read symbols: Bad value >> collect2: error: ld returned 1 exit status >> >>>> This seems to be something special about errno being thread-local in >>>> glibc. Googling turns up a lot of advice on fixing this problem, but >>>> all of it assumes you're just building on linux for linux. >>>> bcrypt_stubs.c does , which I believe is being provided by >>>> minios-xen-0.8/include/minios-xen/errno.h. >>>> >>>> However, at link time I don't know where errno is supposed to come >>>> from. It seems to be coming from glibc, but shouldn't it be coming >>>> from minios instead given that's where the errno header comes from? I >>>> poked around with `nm` in minios' built files but couldn't find >>>> anything that actually defined errno. >>> >>> It's from mirage-xen: >>> >>> https://github.com/mirage/mirage-platform/blob/c035439de703edbfdd096044afdbab85f4cbf61f/bindings/main.c#L30 >> >> Which compiled libraries does that end up in though? >> >> I tried `nm`-ing all the built files from mirage-{xen,xen-posix,xen-ocaml} with: >> >> $ find /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4 >> /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4 >> /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3 -type f >> -exec bash -c 'if nm {} 2>/dev/null | grep -q errno; then echo {}; nm >> {} | grep errno; fi' \; >> /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4/lib/mirage-xen-ocaml/libxenasmrun.a >> U errno >> U errno >> U errno >> U errno >> /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4/lib/mirage-xen-posix/libxenposix.a >> U errno >> 0000000000000e4a T __h_errno_location >> /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3/lib/mirage-xen/libxencamlbindings.a >> 0000000000000004 C errno > > This is it (C = Common). > >> So there are only .a files (which ld ignores when creating a shared >> library, doesn't it?), and only libxencamlbindings actually defines it >> (the others just reference it), which doesn't seem like a library I'd >> necessarily need to link against. >> >> I don't know if mirage-xen actually makes use of .so libraries, as >> I've only seen it produce static executables. But even if it doesn't >> need them, I'd need to somehow tell oasis not to build shared versions >> of safepass (both the .so and the .cmxs). > > Correct: Mirage on Xen does not use shared libraries. I don't know how > to prevent them from being built. The easiest option might be to > remove the uses of errno from the library (it doesn't look like the > OCaml bindings do anything with it anyway). The ocaml bindings (bcrypt_stub.c) doesn't, but the C code compiled with it (crypt_blowfish.c) does, so I can't just remove it sadly. So this is a bit ridiculous, but I did manage to get it compiling with the following hack in the build script: mkdir fake_libc echo '"fake_libc": -traverse' >> _tags touch fake_libc/libc.c gcc -shared -nostdlib -o fake_libc/libc.so fake_libc/libc.c (and also added -L$PWD/fake_libc to oasis' CCLib field) I initially put just `int errno;` in that file, but it still works without it. Seems like all it needs is for something to override glibc on the library search path which doesn't contain any conflicting definitions. It would probably work if I could just specify -nostdlib too, but that's not so easy with .cmxa files. I haven't actually been able to check whether the compiled xen executable runs without issue yet, but both safepass and passe (which uses it) now compile in xen mode, so that's a good sign! I wonder if it would be worth providing some sort of stub libc.so with mirage for this purpose? It seems like a lot of build tools expect to be able to build a .so, and it may be easier to let them do their thing with something trivial to link against rather than trying to force them to build only static libraries. Thanks for your help Thomas, and let me know if you have any better ideas - I'll also get in touch with the safepass author now that I have something working, and see if they have other ideas too. Cheers, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 11:48:57 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 11:48:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxRP-0002om-Gw; Tue, 12 Jan 2016 11:48:47 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxRO-0002oc-5B for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 11:48:46 +0000 Received: from [85.158.143.35] by server-3.bemta-4.messagelabs.com id A8/36-31122-D18E4965; Tue, 12 Jan 2016 11:48:45 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-15.tower-21.messagelabs.com!1452599315!9624252!1 X-Originating-IP: [209.85.213.42] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 4793 invoked from network); 12 Jan 2016 11:48:43 -0000 Received: from mail-vk0-f42.google.com (HELO mail-vk0-f42.google.com) (209.85.213.42) by server-15.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 12 Jan 2016 11:48:43 -0000 Received: by mail-vk0-f42.google.com with SMTP id a123so210673988vkh.1 for ; Tue, 12 Jan 2016 03:48:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=hEoiP3RN0XLjmhslWYwiVpEvJuEd11B4lgZwsXIP73E=; b=QbuirEkZDRbYDgb+c4oa8o3xOMgxYxTSHi0p+6qDyS/NBHhchPxVVQ7pgen+BzW6YU AKz6/HqNJPw/qPmFTCB5UURu6v9Y3doZxYbeD3vmi85NdZ8OkHtLDEdP5QNbfApwrmUi lX4esQA6LnVU5Cl1JI5RLi2eScO3fc/S1uSScK1iD02u1KxBhKgfijc+QLcKdFb2Sib1 obrq0fexI/bd2miKkyjYg384gkPlN9PWGtpm+pRXft/zwcKk7kTTLNSUUvLSXUsE75i5 yVb13JBzSzS6FQGSbv/DbgpwAeig4ktXBZsTz2iuJloF3WzIHEjz1TREOZbErnlrBrZT kTmA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=hEoiP3RN0XLjmhslWYwiVpEvJuEd11B4lgZwsXIP73E=; b=G3r52saj8kVRWQs9W8ixB5EXXRPXSIcQNR4Asc7O5OzC2XUIXZuLxJthFKR9m/T7cP 2Z422+XbLNZ73OmDqjkuTtJWDAmD89/bW/E9K9DTdOv0MGIUcw1180A3tiMLayziidAX QXN45axGzg0+Q8az+KsN+PwAM7FPpol0jWwt7s8HyzpWRNG/4z951pCn3zlOc+YltwOm yXPH5IYTXVanMfEGfS4CLMB+EDG8kH9+gtIbUP2iF8+V8ef+swymdM9bzWMaudko2zfL cNNacLfr9nHq3n8Ymf4hi9nMK4TY3431QmcoO7FID6rAzhwkbAjvetSjehPzldiaVPta /MUg== X-Gm-Message-State: ALoCoQmJv9KculeoadWQ9P4pdvhCsvRhD6sHgCLlmgPEGE9ekN6m7uFfEF3upvDq78BhimMI/pqF8q2y4FLf9RxI2GsWDSwtig== X-Received: by 10.31.54.134 with SMTP id d128mr85632453vka.26.1452599315042; Tue, 12 Jan 2016 03:48:35 -0800 (PST) Received: from mail-vk0-f48.google.com (mail-vk0-f48.google.com. [209.85.213.48]) by smtp.gmail.com with ESMTPSA id x71sm13105508vkx.4.2016.01.12.03.48.34 for (version=TLSv1/SSLv3 cipher=OTHER); Tue, 12 Jan 2016 03:48:34 -0800 (PST) Received: by mail-vk0-f48.google.com with SMTP id n1so86746493vkb.3 for ; Tue, 12 Jan 2016 03:48:34 -0800 (PST) X-Received: by 10.31.149.78 with SMTP id x75mr77187255vkd.103.1452599314128; Tue, 12 Jan 2016 03:48:34 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Tue, 12 Jan 2016 03:48:14 -0800 (PST) In-Reply-To: References: From: Tim Cuthbertson Date: Tue, 12 Jan 2016 22:48:14 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Mon, Jan 11, 2016 at 9:48 PM, Thomas Leonard wrote: > On 11 January 2016 at 09:06, Tim Cuthbertson wrote: >> On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard wrote: >>> On 10 January 2016 at 10:15, Tim Cuthbertson wrote: >>>> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: >>>>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: >>>>>> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >>>>>> There is sadly no `safepass-xen` package, and trying to just use >>>>>> `safepass` results in link errors: >>>>>> >>>>>> >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `BF_crypt': >>>>>> (.text+0x1b97): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `BF_crypt': >>>>>> (.text+0x2112): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `_crypt_blowfish_rn': >>>>>> (.text+0x21ea): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `_crypt_gensalt_blowfish_rn': >>>>>> (.text+0x2575): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o): In function >>>>>> `_crypt_gensalt_blowfish_rn': >>>>>> (.text+0x25a6): undefined reference to `__errno_location' >>>>>> <...>/lib/safepass/libsafepass_stubs.a(crypt_blowfish.o):(.text+0x25b7): >>>>>> more undefined references to `__errno_location' follow >>>>>> >>>>>> >>>>>> I'm assuming I'd need to customise the build process tp produce an >>>>>> appropriate C library as with `gmp-xen`, `zarith-xen` etc. The trouble >>>>>> is twofold: >>>>>> >>>>>> - I don't really know what the thing I'm doing is. Is mirage-xen a >>>>>> different architecture? A different ABI? Do C libraries need to be >>>>>> cross-compiled, or just compiled with particular flags so that they'll >>>>>> work on xen-minios instead of gnu/linux? >>>>> >>>>> C libraries need to be compiled with different headers and flags (in >>>>> particular, -mno-red-zone). Using libraries compiled for Linux will >>>>> often appear to work, but may fail when interrupts occur, so the build >>>>> makes it hard to use them by accident. >>>>> >>>>> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone >>>>> and the OCaml ABI is the same). >>>>> >>>>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >>>>>> mainly with particular CFLAGS >>>>>> (https://github.com/ocaml/opam-repository/blob/master/packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >>>>> >>>>> It's using pkg-config to get the important flags. The others are >>>>> optimisations (except -fno-builtin, which is either not needed or >>>>> should be supplied by Mini-OS). >>>>> >>>>>> while gmp looks like a full cross-compilation using `--target` (and >>>>>> then does some other sneaky things). >>>>>> >>>>>> safepass uses OASIS for its build system, which doesn't seem to have >>>>>> any cross-compilation functionality built in as far as I could tell. >>>>>> Can anyone give me pointers on what I'd need to do to safepass' build >>>>>> scripts to get this working in mirage-xen, or at the least some >>>>>> clarification on why it doesn't work as-is and how cross compilation >>>>>> works for C libraries used in mirage-xen? >>>>>> >>>>>> [0]: https://github.com/timbertson/passe >>>>> >>>>> The io-page library provides a fairly simple template: >>>>> >>>>> https://github.com/mirage/io-page/blob/master/_oasis >>>>> >>>>> It builds io_page_unix and io_page_xen libraries. The C flags are >>>>> added to the main META file with: >>>>> >>>>> XMETAExtraLines: xen_linkopts = "-lio_page_xen_stubs" >>>>> >>>>> There's a command to get the Xen flags: >>>>> >>>>> PostConfCommand: ocaml postconf.ml >>>>> >>>>> The Xen source file (stub_alloc_pages_xen.c) is just a symlink to the >>>>> Unix one (you need a separate file because OASIS can't compile the >>>>> same source path with different flags). >>>> >>>> Thanks, Thomas. - that helps quite a lot >>>> >>>> I think I've followed the same pattern now, but still haven't been >>>> able to get safepass building. >>>> >>>> I'm using the following for CCOpt: >>>> >>>> `pkg-config --cflags --static mirage-xen-ocaml` >>>> >>>> Now the linking phase fails with: >>>> >>>> + ocamlfind ocamlmklib -o src/safepass_stubs src/crypt_blowfish.o >>>> src/bcrypt_stub.o >>>> ld: errno: TLS definition in /nix/store/<...>-glibc-2.21/lib/libc.so.6 >>>> section .tbss mismatches non-TLS reference in src/crypt_blowfish.o >>>> /nix/store/<...>-glibc-2.21/lib/libc.so.6: could not read symbols: Bad value >>>> collect2: error: ld returned 1 exit status >>>> Command exited with code 2. >>>> E: Failure("Command ''ocamlbuild' src/libsafepass_stubs.a >>>> src/dllsafepass_stubs.so src/safepass.cma src/safepass.cmxa >>>> src/safepass.a src/safepass.cmxs -tag debug' terminated with error >>>> code 10") >>> >>> Try running it as "ocamlfind ocamlmklib -verbose" to see what commands >>> it's actually using. For io-page, I get: >>> >>> $ ocamlfind ocamlmklib -verbose -o lib/io_page_xen_stubs >>> lib/stub_alloc_pages_xen.o >>> Effective set of compiler predicates: autolink,byte,native >>> + ocamlmklib -ocamlc ocamlc.opt -ocamlopt ocamlopt.opt -verbose -o >>> lib/io_page_xen_stubs lib/stub_alloc_pages_xen.o >>> + gcc -shared -o lib/dllio_page_xen_stubs.so lib/stub_alloc_pages_xen.o >>> + ar rc lib/libio_page_xen_stubs.a lib/stub_alloc_pages_xen.o; ranlib >>> lib/libio_page_xen_stubs.a >>> >>> So it doesn't seem to be using ld at all, just ar. >> >> Tracing it with strace, that `gcc -shared` process ends up invoking >> `ld` internally. >> >> I tried running ocamlmklib with the `-failsafe` option, and it does >> continue past this and produce the static .a library using `ar`. But >> if I try and put that flag into the larger build it doesn't get much >> further, because it hits the same issue when creating >> src/safepass.cmxs: >> >> + ocamlfind ocamlopt -shared -I src src/safepass.cmxa src/bcrypt.cmx >> -o src/safepass.cmxs >> ld: errno: TLS definition in libc.so.6 section .tbss mismatches >> non-TLS reference in src/libsafepass_stubs.a(crypt_blowfish.o) >> libc.so.6: could not read symbols: Bad value >> collect2: error: ld returned 1 exit status >> >>>> This seems to be something special about errno being thread-local in >>>> glibc. Googling turns up a lot of advice on fixing this problem, but >>>> all of it assumes you're just building on linux for linux. >>>> bcrypt_stubs.c does , which I believe is being provided by >>>> minios-xen-0.8/include/minios-xen/errno.h. >>>> >>>> However, at link time I don't know where errno is supposed to come >>>> from. It seems to be coming from glibc, but shouldn't it be coming >>>> from minios instead given that's where the errno header comes from? I >>>> poked around with `nm` in minios' built files but couldn't find >>>> anything that actually defined errno. >>> >>> It's from mirage-xen: >>> >>> https://github.com/mirage/mirage-platform/blob/c035439de703edbfdd096044afdbab85f4cbf61f/bindings/main.c#L30 >> >> Which compiled libraries does that end up in though? >> >> I tried `nm`-ing all the built files from mirage-{xen,xen-posix,xen-ocaml} with: >> >> $ find /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4 >> /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4 >> /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3 -type f >> -exec bash -c 'if nm {} 2>/dev/null | grep -q errno; then echo {}; nm >> {} | grep errno; fi' \; >> /nix/store/inxv9vdvnz8cjs6236fmalj0mnaq3sgx-mirage-xen-ocaml-2.3.4/lib/mirage-xen-ocaml/libxenasmrun.a >> U errno >> U errno >> U errno >> U errno >> /nix/store/vbz4pivjk196dw5h8rmg68qxh5m44cn9-mirage-xen-posix-2.3.4/lib/mirage-xen-posix/libxenposix.a >> U errno >> 0000000000000e4a T __h_errno_location >> /nix/store/24lm5990pxzp71nsgnffcmb2i7n41fck-mirage-xen-2.3.3/lib/mirage-xen/libxencamlbindings.a >> 0000000000000004 C errno > > This is it (C = Common). > >> So there are only .a files (which ld ignores when creating a shared >> library, doesn't it?), and only libxencamlbindings actually defines it >> (the others just reference it), which doesn't seem like a library I'd >> necessarily need to link against. >> >> I don't know if mirage-xen actually makes use of .so libraries, as >> I've only seen it produce static executables. But even if it doesn't >> need them, I'd need to somehow tell oasis not to build shared versions >> of safepass (both the .so and the .cmxs). > > Correct: Mirage on Xen does not use shared libraries. I don't know how > to prevent them from being built. The easiest option might be to > remove the uses of errno from the library (it doesn't look like the > OCaml bindings do anything with it anyway). The ocaml bindings (bcrypt_stub.c) doesn't, but the C code compiled with it (crypt_blowfish.c) does, so I can't just remove it sadly. So this is a bit ridiculous, but I did manage to get it compiling with the following hack in the build script: mkdir fake_libc echo '"fake_libc": -traverse' >> _tags touch fake_libc/libc.c gcc -shared -nostdlib -o fake_libc/libc.so fake_libc/libc.c (and also added -L$PWD/fake_libc to oasis' CCLib field) I initially put just `int errno;` in that file, but it still works without it. Seems like all it needs is for something to override glibc on the library search path which doesn't contain any conflicting definitions. It would probably work if I could just specify -nostdlib too, but that's not so easy with .cmxa files. I haven't actually been able to check whether the compiled xen executable runs without issue yet, but both safepass and passe (which uses it) now compile in xen mode, so that's a good sign! I wonder if it would be worth providing some sort of stub libc.so with mirage for this purpose? It seems like a lot of build tools expect to be able to build a .so, and it may be easier to let them do their thing with something trivial to link against rather than trying to force them to build only static libraries. Thanks for your help Thomas, and let me know if you have any better ideas - I'll also get in touch with the safepass author now that I have something working, and see if they have other ideas too. Cheers, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 11:58:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 11:58:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxaU-0003Bo-ST; Tue, 12 Jan 2016 11:58:10 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxaT-0003Bg-8B for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 11:58:09 +0000 Received: from [85.158.139.211] by server-12.bemta-5.messagelabs.com id A4/33-12831-05AE4965; Tue, 12 Jan 2016 11:58:08 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-6.tower-206.messagelabs.com!1452599887!15029196!1 X-Originating-IP: [209.85.213.41] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 36155 invoked from network); 12 Jan 2016 11:58:07 -0000 Received: from mail-vk0-f41.google.com (HELO mail-vk0-f41.google.com) (209.85.213.41) by server-6.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 12 Jan 2016 11:58:07 -0000 Received: by mail-vk0-f41.google.com with SMTP id a123so210793481vkh.1 for ; Tue, 12 Jan 2016 03:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=Cuo+TCaczPfthSQg2b+BqsGzbjgbr3IQXuB305UaxBM=; b=nGXhb2ti8fpd9ct61Tn26rjFpH+WnK6oGlnbeDbEhHHDn5KkPyeUJdFcoRGHJx9lij ozioN6UsvoGls9GO+B6wJrdUeomDFUf2zMzy9t7c65oefvWWKazIJcqvv1Sgtbf6LvTZ GVQ50s5w91+LPR9mxErOwRM3/ISHlegv/I83rCsixrgkQjzO9tzT3gPKoMCAWThermFc V3Z82NPxBCN0HzqlPD1UfWsIKOy2IWcwZqAuaj1o4QOXNcorGBhhk2KYuHP958wz0BkH ay6bYL3DyMziyGFcF6ubsRElRxEjZO6R5fzhrQ7mMlRtdQTGiI3xlA02FoJJq1u8sYcp 71PA== MIME-Version: 1.0 X-Received: by 10.31.178.134 with SMTP id b128mr54955882vkf.112.1452599886607; Tue, 12 Jan 2016 03:58:06 -0800 (PST) Received: by 10.31.128.84 with HTTP; Tue, 12 Jan 2016 03:58:06 -0800 (PST) Date: Tue, 12 Jan 2016 11:58:06 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] mirage-logs and functoria X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org mirage-logs is a log reporter for the Logs library that works with Mirage unikernels. https://github.com/talex5/mirage-logs Basic usage looks like this: module Main (Clock : V1.CLOCK) = struct module Log_reporter = Mirage_logs.Make(Clock) let start () = Log_reporter.(create () |> run) @@ fun () -> ... Log messages are generated using the normal Logs API (0.5.0). e.g. let src = Logs.Src.create "unikernel" ~doc:"Main unikernel code" module Log = (val Logs.src_log src : Logs.LOG) ... Log.info (fun f -> f "agents connected in %.3f s (CPU time used since boot: %.3f s)" (Clock.time () -. start_time) (Sys.time ())); ( I originally had mirage-logs writing to a Mirage CONSOLE device, but that's asynchronous. That meant that I had to queue messages, drop messages when the queue got too long etc. And if the unikernel crashed, you wouldn't see the latest messages. Instead, it now writes to stderr, which is blocking on Unix and Xen. This means that if you generate a lot of logging output then your unikernel may run slowly, but you will get all the messages. ) Sample output: MirageOS booting... Initialising timer interface Initialising console ... done. Netif: add resume hook gnttab_stubs.c: initialised mini-os gntmap 2016-01-12 11:45.09: INF [qubes.rexec] waiting for client... 2016-01-12 11:45.09: INF [qubes.gui] waiting for client... 2016-01-12 11:45.09: INF [qubes.db] connecting to server... 2016-01-12 11:45.09: INF [qubes.db] connected 2016-01-12 11:45.09: INF [qubes.rexec] client connected, using protocol version 2 Extra features: If log messages include tags, these are also printed. If tracing is enabled (with mirage-profile) then any log message reaching the reporter is also written to the trace buffer, and will appear in the viewer. You can specify a threshold function for console messages, so that detailed logging can be written to the trace buffer but only important messages are displayed on the console. You can also configure a ring buffer for log messages. Any message received by the reporter (whether shown on the console or not) will be written to the ring. If an exception occurs, the contents of the ring are dumped to stderr. e.g. let console_threshold src = match Logs.Src.name src with | "noisy.library" -> Logs.Warning | _ -> Logs.Info in Logs_reporter.(create ~ring_size:20 ~console_threshold () |> run) @@ fun () -> ... Ideally, I'd like to integrate this with functoria. What would be the best way to do this? Is it possible to do something like this? register "console" [mirage_logs (main $ default_console)] -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 11:58:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 11:58:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxaU-0003Bo-ST; Tue, 12 Jan 2016 11:58:10 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxaT-0003Bg-8B for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 11:58:09 +0000 Received: from [85.158.139.211] by server-12.bemta-5.messagelabs.com id A4/33-12831-05AE4965; Tue, 12 Jan 2016 11:58:08 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-6.tower-206.messagelabs.com!1452599887!15029196!1 X-Originating-IP: [209.85.213.41] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 36155 invoked from network); 12 Jan 2016 11:58:07 -0000 Received: from mail-vk0-f41.google.com (HELO mail-vk0-f41.google.com) (209.85.213.41) by server-6.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 12 Jan 2016 11:58:07 -0000 Received: by mail-vk0-f41.google.com with SMTP id a123so210793481vkh.1 for ; Tue, 12 Jan 2016 03:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=Cuo+TCaczPfthSQg2b+BqsGzbjgbr3IQXuB305UaxBM=; b=nGXhb2ti8fpd9ct61Tn26rjFpH+WnK6oGlnbeDbEhHHDn5KkPyeUJdFcoRGHJx9lij ozioN6UsvoGls9GO+B6wJrdUeomDFUf2zMzy9t7c65oefvWWKazIJcqvv1Sgtbf6LvTZ GVQ50s5w91+LPR9mxErOwRM3/ISHlegv/I83rCsixrgkQjzO9tzT3gPKoMCAWThermFc V3Z82NPxBCN0HzqlPD1UfWsIKOy2IWcwZqAuaj1o4QOXNcorGBhhk2KYuHP958wz0BkH ay6bYL3DyMziyGFcF6ubsRElRxEjZO6R5fzhrQ7mMlRtdQTGiI3xlA02FoJJq1u8sYcp 71PA== MIME-Version: 1.0 X-Received: by 10.31.178.134 with SMTP id b128mr54955882vkf.112.1452599886607; Tue, 12 Jan 2016 03:58:06 -0800 (PST) Received: by 10.31.128.84 with HTTP; Tue, 12 Jan 2016 03:58:06 -0800 (PST) Date: Tue, 12 Jan 2016 11:58:06 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] mirage-logs and functoria X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org mirage-logs is a log reporter for the Logs library that works with Mirage unikernels. https://github.com/talex5/mirage-logs Basic usage looks like this: module Main (Clock : V1.CLOCK) = struct module Log_reporter = Mirage_logs.Make(Clock) let start () = Log_reporter.(create () |> run) @@ fun () -> ... Log messages are generated using the normal Logs API (0.5.0). e.g. let src = Logs.Src.create "unikernel" ~doc:"Main unikernel code" module Log = (val Logs.src_log src : Logs.LOG) ... Log.info (fun f -> f "agents connected in %.3f s (CPU time used since boot: %.3f s)" (Clock.time () -. start_time) (Sys.time ())); ( I originally had mirage-logs writing to a Mirage CONSOLE device, but that's asynchronous. That meant that I had to queue messages, drop messages when the queue got too long etc. And if the unikernel crashed, you wouldn't see the latest messages. Instead, it now writes to stderr, which is blocking on Unix and Xen. This means that if you generate a lot of logging output then your unikernel may run slowly, but you will get all the messages. ) Sample output: MirageOS booting... Initialising timer interface Initialising console ... done. Netif: add resume hook gnttab_stubs.c: initialised mini-os gntmap 2016-01-12 11:45.09: INF [qubes.rexec] waiting for client... 2016-01-12 11:45.09: INF [qubes.gui] waiting for client... 2016-01-12 11:45.09: INF [qubes.db] connecting to server... 2016-01-12 11:45.09: INF [qubes.db] connected 2016-01-12 11:45.09: INF [qubes.rexec] client connected, using protocol version 2 Extra features: If log messages include tags, these are also printed. If tracing is enabled (with mirage-profile) then any log message reaching the reporter is also written to the trace buffer, and will appear in the viewer. You can specify a threshold function for console messages, so that detailed logging can be written to the trace buffer but only important messages are displayed on the console. You can also configure a ring buffer for log messages. Any message received by the reporter (whether shown on the console or not) will be written to the ring. If an exception occurs, the contents of the ring are dumped to stderr. e.g. let console_threshold src = match Logs.Src.name src with | "noisy.library" -> Logs.Warning | _ -> Logs.Info in Logs_reporter.(create ~ring_size:20 ~console_threshold () |> run) @@ fun () -> ... Ideally, I'd like to integrate this with functoria. What would be the best way to do this? Is it possible to do something like this? register "console" [mirage_logs (main $ default_console)] -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 12:11:29 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 12:11:29 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxnE-00041w-KM; Tue, 12 Jan 2016 12:11:20 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxnD-000414-B5 for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 12:11:19 +0000 Received: from [85.158.137.68] by server-9.bemta-3.messagelabs.com id 62/0E-03066-66DE4965; Tue, 12 Jan 2016 12:11:18 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-12.tower-31.messagelabs.com!1452600677!15256457!1 X-Originating-IP: [209.85.213.47] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 8194 invoked from network); 12 Jan 2016 12:11:17 -0000 Received: from mail-vk0-f47.google.com (HELO mail-vk0-f47.google.com) (209.85.213.47) by server-12.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 12 Jan 2016 12:11:17 -0000 Received: by mail-vk0-f47.google.com with SMTP id a123so210972506vkh.1 for ; Tue, 12 Jan 2016 04:11:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=Z7XS/DeI//ybWBq+0d3iFPXzH/530KZxpM9UbJFNSfU=; b=y3nk5yioHaNJR7ui05BKjbRPN6FpJ/qxUwKBnf2DP4BCo/hxLq66CRg7HyijGs46lC A9DkTrrBR0t38vzSaBHNbgQ0OyroDmKNwiHWsQdCzFnNJ5J867nDmI9f3yCvd7vbODrc 3CxPShopBZwLihaPGU+1ZeC5z1wEYed9WSifv0swkNieBVhRqDB7nmZC+b9EoJhyYfI3 OEYZn80m+grepGrUTvnUjbBjO+LcmWhnXpt5zRLkhnT/SBCJJTIt3jmc3Mzeou4nNZPp eyBQkw3QwZpoYen2EXzJzQQvo1xk7EPyeh1o9H+1hdvAhcmBzZ5z2sqqG9+qW7MenxGt oswA== MIME-Version: 1.0 X-Received: by 10.31.56.18 with SMTP id f18mr81483835vka.19.1452600677001; Tue, 12 Jan 2016 04:11:17 -0800 (PST) Received: by 10.31.128.84 with HTTP; Tue, 12 Jan 2016 04:11:16 -0800 (PST) In-Reply-To: References: Date: Tue, 12 Jan 2016 12:11:16 +0000 Message-ID: From: Thomas Leonard To: "M. O." Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Changes in Irmin 0.10.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 11 January 2016 at 15:07, M. O. wrote: > I understand. Irmin.unwatch appears to be Unbounded when building (while > Irmin.watch_key works). Doesn't unwatch need to be exposed in module BC? I don't think so. The documentation says: (** [watch_branches t f] calls [f] every time a branch is added, removed or updated in the local store. Return a function to remove the handler. *) > On 10 January 2016 at 16:50, M. O. wrote: >> Thanks, and how to unwatch a key that is under watch by I.watch_key? > > The Irmin API is documented in irmin.mli, e.g. > > https://github.com/mirage/irmin/blob/master/lib/irmin.mli#L533 > > >>> Hi, >>> >>> Questions regarding changes in Irmin 0.10.0: >>> >>> 1- Is there any equivalence for "Irmin.watch_tags" in the previous >>> releases? >> >> Irmin.Repo.watch_branches >> >>> 2- This is somehow related to the first question, that is how to create a >>> store similar to "Store.of_head config task head" (for instance, from the >>> heads that watch_tag sends to the callback function) in the older >>> versions. >> >> of_head is now of_commit_id. >> > > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 12:11:29 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 12:11:29 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxnE-00041w-KM; Tue, 12 Jan 2016 12:11:20 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIxnD-000414-B5 for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 12:11:19 +0000 Received: from [85.158.137.68] by server-9.bemta-3.messagelabs.com id 62/0E-03066-66DE4965; Tue, 12 Jan 2016 12:11:18 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-12.tower-31.messagelabs.com!1452600677!15256457!1 X-Originating-IP: [209.85.213.47] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 8194 invoked from network); 12 Jan 2016 12:11:17 -0000 Received: from mail-vk0-f47.google.com (HELO mail-vk0-f47.google.com) (209.85.213.47) by server-12.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 12 Jan 2016 12:11:17 -0000 Received: by mail-vk0-f47.google.com with SMTP id a123so210972506vkh.1 for ; Tue, 12 Jan 2016 04:11:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=Z7XS/DeI//ybWBq+0d3iFPXzH/530KZxpM9UbJFNSfU=; b=y3nk5yioHaNJR7ui05BKjbRPN6FpJ/qxUwKBnf2DP4BCo/hxLq66CRg7HyijGs46lC A9DkTrrBR0t38vzSaBHNbgQ0OyroDmKNwiHWsQdCzFnNJ5J867nDmI9f3yCvd7vbODrc 3CxPShopBZwLihaPGU+1ZeC5z1wEYed9WSifv0swkNieBVhRqDB7nmZC+b9EoJhyYfI3 OEYZn80m+grepGrUTvnUjbBjO+LcmWhnXpt5zRLkhnT/SBCJJTIt3jmc3Mzeou4nNZPp eyBQkw3QwZpoYen2EXzJzQQvo1xk7EPyeh1o9H+1hdvAhcmBzZ5z2sqqG9+qW7MenxGt oswA== MIME-Version: 1.0 X-Received: by 10.31.56.18 with SMTP id f18mr81483835vka.19.1452600677001; Tue, 12 Jan 2016 04:11:17 -0800 (PST) Received: by 10.31.128.84 with HTTP; Tue, 12 Jan 2016 04:11:16 -0800 (PST) In-Reply-To: References: Date: Tue, 12 Jan 2016 12:11:16 +0000 Message-ID: From: Thomas Leonard To: "M. O." Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Changes in Irmin 0.10.0 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 11 January 2016 at 15:07, M. O. wrote: > I understand. Irmin.unwatch appears to be Unbounded when building (while > Irmin.watch_key works). Doesn't unwatch need to be exposed in module BC? I don't think so. The documentation says: (** [watch_branches t f] calls [f] every time a branch is added, removed or updated in the local store. Return a function to remove the handler. *) > On 10 January 2016 at 16:50, M. O. wrote: >> Thanks, and how to unwatch a key that is under watch by I.watch_key? > > The Irmin API is documented in irmin.mli, e.g. > > https://github.com/mirage/irmin/blob/master/lib/irmin.mli#L533 > > >>> Hi, >>> >>> Questions regarding changes in Irmin 0.10.0: >>> >>> 1- Is there any equivalence for "Irmin.watch_tags" in the previous >>> releases? >> >> Irmin.Repo.watch_branches >> >>> 2- This is somehow related to the first question, that is how to create a >>> store similar to "Store.of_head config task head" (for instance, from the >>> heads that watch_tag sends to the callback function) in the older >>> versions. >> >> of_head is now of_commit_id. >> > > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 14:01:06 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 14:01:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIzVM-00076O-AE; Tue, 12 Jan 2016 14:01:00 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIzVL-00076J-29 for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 14:00:59 +0000 Received: from [85.158.139.211] by server-6.bemta-5.messagelabs.com id 0A/22-22089-A1705965; Tue, 12 Jan 2016 14:00:58 +0000 X-Env-Sender: drupyog+caml@zoho.com X-Msg-Ref: server-3.tower-206.messagelabs.com!1452607255!15357695!1 X-Originating-IP: [74.201.84.153] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 11397 invoked from network); 12 Jan 2016 14:00:57 -0000 Received: from sender153-mail.zoho.com (HELO sender153-mail.zoho.com) (74.201.84.153) by server-3.tower-206.messagelabs.com with AES128-SHA encrypted SMTP; 12 Jan 2016 14:00:57 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=zapps768; d=zoho.com; h=subject:to:references:from:message-id:date:user-agent:mime-version:in-reply-to:content-type; b=EJIzbs284WtSqOwfmj/GKLYGSPweFNmuXCtPAKe/mNn59452qnp71cilm/glK93rUBID+p4Ki+Cj 6B/qeZF1jUNSl8zewkiQwseqEEUuXXmQcd6AyGFtNKRxclqeGn7M Received: from [134.157.22.141] (134.157.22.141 [134.157.22.141]) by mx.zohomail.com with SMTPS id 1452607254164803.368329052507; Tue, 12 Jan 2016 06:00:54 -0800 (PST) To: Thomas Leonard , "mirageos-devel@lists.xenproject.org" References: From: Drup Message-ID: <56950713.3010306@zoho.com> Date: Tue, 12 Jan 2016 15:00:51 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 In-Reply-To: X-Zoho-Virus-Status: 1 Subject: Re: [MirageOS-devel] mirage-logs and functoria X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org > Ideally, I'd like to integrate this with functoria. What would be the > best way to do this? > Is it possible to do something like this? > > register "console" [mirage_logs (main $ default_console)] Not directly like that. I see several possibilities. - Make "Main" take an extra module argument module L = struct let log = create () |> run end then config.ml is now let log = default_log $ default_console in register "foo" [main $ .. $ log] This way, the functor application of Mirage_logs.Make is outside (in the "default_log" combinator). Maybe it could be combined with Logs.Src.create if that's desirable. - Change a bit the API, so that you have a `start` function that returns a thread that starts the logger (which means no automated function wrapping). Then, we declare main differently: let main = foreign ~deps:[hidden default_log] "Unikernel.Main" ( ... @-> job) `Main.start` will receive an additional value (at least unit, but you can put whatever you want). and that ensures that logs are initialized before the main job is executed. This is what is done for nocrypto. Function wrapping could probably be arranged by using the value passed around. In the end, this could be like 1), but without the functor argument. - The problem with those two methods is similar to your tracing issue. It doesn't log things started before the main job. The third possibility is, we solve https://github.com/mirage/functoria/issues/45 and we add a way to put the logger (and the tracer) there. Again, no automated wrapping _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 14:01:06 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 14:01:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIzVM-00076O-AE; Tue, 12 Jan 2016 14:01:00 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIzVL-00076J-29 for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 14:00:59 +0000 Received: from [85.158.139.211] by server-6.bemta-5.messagelabs.com id 0A/22-22089-A1705965; Tue, 12 Jan 2016 14:00:58 +0000 X-Env-Sender: drupyog+caml@zoho.com X-Msg-Ref: server-3.tower-206.messagelabs.com!1452607255!15357695!1 X-Originating-IP: [74.201.84.153] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 11397 invoked from network); 12 Jan 2016 14:00:57 -0000 Received: from sender153-mail.zoho.com (HELO sender153-mail.zoho.com) (74.201.84.153) by server-3.tower-206.messagelabs.com with AES128-SHA encrypted SMTP; 12 Jan 2016 14:00:57 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=zapps768; d=zoho.com; h=subject:to:references:from:message-id:date:user-agent:mime-version:in-reply-to:content-type; b=EJIzbs284WtSqOwfmj/GKLYGSPweFNmuXCtPAKe/mNn59452qnp71cilm/glK93rUBID+p4Ki+Cj 6B/qeZF1jUNSl8zewkiQwseqEEUuXXmQcd6AyGFtNKRxclqeGn7M Received: from [134.157.22.141] (134.157.22.141 [134.157.22.141]) by mx.zohomail.com with SMTPS id 1452607254164803.368329052507; Tue, 12 Jan 2016 06:00:54 -0800 (PST) To: Thomas Leonard , "mirageos-devel@lists.xenproject.org" References: From: Drup Message-ID: <56950713.3010306@zoho.com> Date: Tue, 12 Jan 2016 15:00:51 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 In-Reply-To: X-Zoho-Virus-Status: 1 Subject: Re: [MirageOS-devel] mirage-logs and functoria X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org > Ideally, I'd like to integrate this with functoria. What would be the > best way to do this? > Is it possible to do something like this? > > register "console" [mirage_logs (main $ default_console)] Not directly like that. I see several possibilities. - Make "Main" take an extra module argument module L = struct let log = create () |> run end then config.ml is now let log = default_log $ default_console in register "foo" [main $ .. $ log] This way, the functor application of Mirage_logs.Make is outside (in the "default_log" combinator). Maybe it could be combined with Logs.Src.create if that's desirable. - Change a bit the API, so that you have a `start` function that returns a thread that starts the logger (which means no automated function wrapping). Then, we declare main differently: let main = foreign ~deps:[hidden default_log] "Unikernel.Main" ( ... @-> job) `Main.start` will receive an additional value (at least unit, but you can put whatever you want). and that ensures that logs are initialized before the main job is executed. This is what is done for nocrypto. Function wrapping could probably be arranged by using the value passed around. In the end, this could be like 1), but without the functor argument. - The problem with those two methods is similar to your tracing issue. It doesn't log things started before the main job. The third possibility is, we solve https://github.com/mirage/functoria/issues/45 and we add a way to put the logger (and the tracer) there. Again, no automated wrapping _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 14:34:42 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 14:34:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJ01v-0008Dv-0t; Tue, 12 Jan 2016 14:34:39 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJ01u-0008DK-D8 for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 14:34:38 +0000 Received: from [193.109.254.147] by server-15.bemta-14.messagelabs.com id C8/C9-10115-DFE05965; Tue, 12 Jan 2016 14:34:37 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-7.tower-27.messagelabs.com!1452609275!16323722!1 X-Originating-IP: [209.85.213.47] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 53515 invoked from network); 12 Jan 2016 14:34:36 -0000 Received: from mail-vk0-f47.google.com (HELO mail-vk0-f47.google.com) (209.85.213.47) by server-7.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 12 Jan 2016 14:34:36 -0000 Received: by mail-vk0-f47.google.com with SMTP id k1so243620808vkb.2 for ; Tue, 12 Jan 2016 06:34:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=gMZJnw/VTfe5tHGd4D3fZyu+F+QPe184djhxL4RBf90=; b=AnjEsZyLRFMoRQnyGnqJ7ErduQcPgEbvt/RbJTDhbRKzmHgvgfcBR/ejMvlVZ7oaBN vhLBUgh0/Iqdl1KH9+L1YG8CEVFe8gmPJCvocMIRQ37LM6984Buy+CyXjhY/OA5HUbrl f6YUzCnLDYxIn3to63g1YbiFb1l4XI0FUseNg3TboyB8ioqUn1x2GmPNIWVYN/+ROBbK TO/pR0FabwUdSp6I28ZXd9tm0knQeYFUPA5I/xBqsL8OOmvIqxgeSZQZAVxl9RXpKTFP Aq1+NnDXq3ArbgzW2Dx5u0+nOwoD9NNFmL+OtMKD2a6rljLOAq7QB5ZpJfE6shEgjDWc oJ9w== MIME-Version: 1.0 X-Received: by 10.31.178.134 with SMTP id b128mr55399326vkf.112.1452609275491; Tue, 12 Jan 2016 06:34:35 -0800 (PST) Received: by 10.31.128.84 with HTTP; Tue, 12 Jan 2016 06:34:35 -0800 (PST) In-Reply-To: <56950713.3010306@zoho.com> References: <56950713.3010306@zoho.com> Date: Tue, 12 Jan 2016 14:34:35 +0000 Message-ID: From: Thomas Leonard To: Drup Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] mirage-logs and functoria X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 12 January 2016 at 14:00, Drup wrote: >> Ideally, I'd like to integrate this with functoria. What would be the >> best way to do this? >> Is it possible to do something like this? >> >> register "console" [mirage_logs (main $ default_console)] > > > Not directly like that. I see several possibilities. > > - Make "Main" take an extra module argument > module L = struct let log = create () |> run end > then config.ml is now > let log = default_log $ default_console in > register "foo" [main $ .. $ log] > > This way, the functor application of Mirage_logs.Make is outside (in the > "default_log" combinator). > Maybe it could be combined with Logs.Src.create if that's desirable. > > - Change a bit the API, so that you have a `start` function that returns a > thread that starts the logger > (which means no automated function wrapping). > > Then, we declare main differently: > let main = foreign ~deps:[hidden default_log] "Unikernel.Main" ( ... > @-> job) > `Main.start` will receive an additional value (at least unit, but you can > put whatever you want). > and that ensures that logs are initialized before the main job is > executed. > This is what is done for nocrypto. Do you mean "before the main job's start function is called" or "before any of the inputs are evaluated"? The second would be OK. The docs say: {- If [deps] is set, the given list of {{!abstract_impl}abstract} implementations is added as data-dependencies: they will be initialized before calling [name.connect]. } However, there is no [name.connect] function. If it means [name.start] then I don't see what the difference is between this and declaring it as a regular argument. > Function wrapping could probably be arranged by using the value passed > around. > In the end, this could be like 1), but without the functor argument. > > - The problem with those two methods is similar to your tracing issue. It > doesn't log things started before the main job. > The third possibility is, we solve > https://github.com/mirage/functoria/issues/45 and we add a way to put the > logger (and the tracer) there. > Again, no automated wrapping Yes. I think we have a slight advantage here: libraries using Logs will be written to assume that there will be no log output until their connect function is called (whereas libraries aren't generally aware that they might be being traced). However, being able to trace the connect calls is really useful, so waiting until Main.start is too late. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 14:34:42 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 14:34:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJ01v-0008Dv-0t; Tue, 12 Jan 2016 14:34:39 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJ01u-0008DK-D8 for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 14:34:38 +0000 Received: from [193.109.254.147] by server-15.bemta-14.messagelabs.com id C8/C9-10115-DFE05965; Tue, 12 Jan 2016 14:34:37 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-7.tower-27.messagelabs.com!1452609275!16323722!1 X-Originating-IP: [209.85.213.47] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 53515 invoked from network); 12 Jan 2016 14:34:36 -0000 Received: from mail-vk0-f47.google.com (HELO mail-vk0-f47.google.com) (209.85.213.47) by server-7.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 12 Jan 2016 14:34:36 -0000 Received: by mail-vk0-f47.google.com with SMTP id k1so243620808vkb.2 for ; Tue, 12 Jan 2016 06:34:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=gMZJnw/VTfe5tHGd4D3fZyu+F+QPe184djhxL4RBf90=; b=AnjEsZyLRFMoRQnyGnqJ7ErduQcPgEbvt/RbJTDhbRKzmHgvgfcBR/ejMvlVZ7oaBN vhLBUgh0/Iqdl1KH9+L1YG8CEVFe8gmPJCvocMIRQ37LM6984Buy+CyXjhY/OA5HUbrl f6YUzCnLDYxIn3to63g1YbiFb1l4XI0FUseNg3TboyB8ioqUn1x2GmPNIWVYN/+ROBbK TO/pR0FabwUdSp6I28ZXd9tm0knQeYFUPA5I/xBqsL8OOmvIqxgeSZQZAVxl9RXpKTFP Aq1+NnDXq3ArbgzW2Dx5u0+nOwoD9NNFmL+OtMKD2a6rljLOAq7QB5ZpJfE6shEgjDWc oJ9w== MIME-Version: 1.0 X-Received: by 10.31.178.134 with SMTP id b128mr55399326vkf.112.1452609275491; Tue, 12 Jan 2016 06:34:35 -0800 (PST) Received: by 10.31.128.84 with HTTP; Tue, 12 Jan 2016 06:34:35 -0800 (PST) In-Reply-To: <56950713.3010306@zoho.com> References: <56950713.3010306@zoho.com> Date: Tue, 12 Jan 2016 14:34:35 +0000 Message-ID: From: Thomas Leonard To: Drup Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] mirage-logs and functoria X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 12 January 2016 at 14:00, Drup wrote: >> Ideally, I'd like to integrate this with functoria. What would be the >> best way to do this? >> Is it possible to do something like this? >> >> register "console" [mirage_logs (main $ default_console)] > > > Not directly like that. I see several possibilities. > > - Make "Main" take an extra module argument > module L = struct let log = create () |> run end > then config.ml is now > let log = default_log $ default_console in > register "foo" [main $ .. $ log] > > This way, the functor application of Mirage_logs.Make is outside (in the > "default_log" combinator). > Maybe it could be combined with Logs.Src.create if that's desirable. > > - Change a bit the API, so that you have a `start` function that returns a > thread that starts the logger > (which means no automated function wrapping). > > Then, we declare main differently: > let main = foreign ~deps:[hidden default_log] "Unikernel.Main" ( ... > @-> job) > `Main.start` will receive an additional value (at least unit, but you can > put whatever you want). > and that ensures that logs are initialized before the main job is > executed. > This is what is done for nocrypto. Do you mean "before the main job's start function is called" or "before any of the inputs are evaluated"? The second would be OK. The docs say: {- If [deps] is set, the given list of {{!abstract_impl}abstract} implementations is added as data-dependencies: they will be initialized before calling [name.connect]. } However, there is no [name.connect] function. If it means [name.start] then I don't see what the difference is between this and declaring it as a regular argument. > Function wrapping could probably be arranged by using the value passed > around. > In the end, this could be like 1), but without the functor argument. > > - The problem with those two methods is similar to your tracing issue. It > doesn't log things started before the main job. > The third possibility is, we solve > https://github.com/mirage/functoria/issues/45 and we add a way to put the > logger (and the tracer) there. > Again, no automated wrapping Yes. I think we have a slight advantage here: libraries using Logs will be written to assume that there will be no log output until their connect function is called (whereas libraries aren't generally aware that they might be being traced). However, being able to trace the connect calls is really useful, so waiting until Main.start is too late. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 12 14:59:32 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 12 Jan 2016 14:59:32 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJ0Px-0000rv-Q7; Tue, 12 Jan 2016 14:59:29 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJ0Pw-0000rm-8B for mirageos-devel@lists.xenproject.org; Tue, 12 Jan 2016 14:59:28 +0000 Received: from [85.158.137.68] by server-12.bemta-3.messagelabs.com id 57/01-14900-FC415965; Tue, 12 Jan 2016 14:59:27 +0000 X-Env-Sender: drupyog+caml@zoho.com X-Msg-Ref: server-11.tower-31.messagelabs.com!1452610765!14811410!1 X-Originating-IP: [74.201.84.153] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 59747 invoked from network); 12 Jan 2016 14:59:26 -0000 Received: from sender153-mail.zoho.com (HELO sender153-mail.zoho.com) (74.201.84.153) by server-11.tower-31.messagelabs.com with AES128-SHA encrypted SMTP; 12 Jan 2016 14:59:26 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=zapps768; d=zoho.com; h=subject:to:references:cc:from:message-id:date:user-agent:mime-version:in-reply-to:content-type; b=uVLf6bvF5UVETud64RfrCs6vc5DKPbLD1ASbEZ6yPD+wwbjRjK/uNw5TrOSaysrBukO9ZAQ6cOYG 9y0W6Zj7viWOqm+qJ6XVlmeI4fzvx27thuh4gJPpv6vitBWIx1fM Received: from [134.157.22.141] (134.157.22.141 [134.157.22.141]) by mx.zohomail.com with SMTPS id 1452610764423965.8383656732203; Tue, 12 Jan 2016 06:59:24 -0800 (PST) To: Thomas Leonard References: <56950713.3010306@zoho.com> From: Drup Message-ID: <569514CA.6090006@zoho.com> Date: Tue, 12 Jan 2016 15:59:22 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 In-Reply-To: Content-Length: 4564 X-Zoho-Virus-Status: 1 Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] mirage-logs and functoria X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org TGUgMTIvMDEvMjAxNiAxNTozNCwgVGhvbWFzIExlb25hcmQgYSDDqWNyaXQgOgo+IE9uIDEyIEph 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256/256) Tue, 12 Jan 2016 10:17:19 -0500 Received: from /spool/local by smtp.notes.na.collabserv.com with smtp.notes.na.collabserv.com ESMTP for from ; Tue, 12 Jan 2016 15:17:07 -0000 Received: from us1a3-smtp02.a3.dal06.isc4sb.com (10.106.154.103) by smtp.notes.na.collabserv.com (10.106.227.16) with smtp.notes.na.collabserv.com ESMTP; Tue, 12 Jan 2016 15:17:04 -0000 Received: from us1a3-mail131.a3.dal06.isc4sb.com ([10.146.45.162]) by us1a3-smtp02.a3.dal06.isc4sb.com with ESMTP id 2016011215175959-296372 ; Tue, 12 Jan 2016 15:17:59 +0000 In-Reply-To: To: mirageos-devel@lists.xenproject.org From: "Daniel J Williams" Date: Tue, 12 Jan 2016 10:17:00 -0500 References: X-KeepSent: BCA0FAC2:9AC46590-00257F38:004FBD1D; type=4; name=$KeepSent X-Mailer: IBM Notes Release 9.0.1FP3 SHF226 March 23, 2015 X-LLNOutbound: False X-Disclaimed: 2663 X-TNEFEvaluated: 1 x-cbid: 16011215-0045-0000-0000-0000030BB4F4 X-IBM-ISS-SpamDetectors: Score=0.415652; BY=0.114741; FL=0; FP=0; FZ=0; HX=0; KW=0; PH=0; SC=0.415652; ST=0; TS=0; UL=0; ISC= X-IBM-ISS-DetailInfo: BY=3.00004779; HX=3.00000239; KW=3.00000007; PH=3.00000004; SC=3.00000131; SDB=6.00644246; UDB=6.00290434; UTC=2016-01-12 15:17:06 x-cbparentid: 16011215-5938-0000-0000-0000019BAE84 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============6521540081912680320==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============6521540081912680320== Content-type: multipart/alternative; Boundary="0__=8FBBF5ABDFDC3B8D8f9e8a93df938690918c8FBBF5ABDFDC3B8D" Content-Disposition: inline --0__=8FBBF5ABDFDC3B8D8f9e8a93df938690918c8FBBF5ABDFDC3B8D Content-Transfer-Encoding: quoted-printable Content-type: text/plain; charset=US-ASCII > On Mon, Jan 11, 2016 at 9:48 PM, Thomas Leonard wrote: > > On 11 January 2016 at 09:06, Tim Cuthbertson wrote: > >> On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard wrote: > >>> On 10 January 2016 at 10:15, Tim Cuthbertson wrote: > >>>> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: > >>>>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: > >>>>>> - I don't really know what the thing I'm doing is. Is mirage-xen a > >>>>>> different architecture? A different ABI? Do C libraries need to be > >>>>>> cross-compiled, or just compiled with particular flags so that they'll > >>>>>> work on xen-minios instead of gnu/linux? > >>>>> > >>>>> C libraries need to be compiled with different headers and flags (in > >>>>> particular, -mno-red-zone). Using libraries compiled for Linux will > >>>>> often appear to work, but may fail when interrupts occur, so the build > >>>>> makes it hard to use them by accident. > >>>>> > >>>>> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone > >>>>> and the OCaml ABI is the same). > >>>>> > >>>>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away > >>>>>> mainly with particular CFLAGS > >>>>>> (https://github.com/ocaml/opam-repository/blob/master/ > packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), > >>>>> > >>>>> It's using pkg-config to get the important flags. The others are > >>>>> optimisations (except -fno-builtin, which is either not needed or > >>>>> should be supplied by Mini-OS). > >>>>> > >>>>>> while gmp looks like a full cross-compilation using `--target` (and > >>>>>> then does some other sneaky things). > >>>>>> > >>>>>> safepass uses OASIS for its build system, which doesn't seem to have > >>>>>> any cross-compilation functionality built in as far as I could tell. > >>>>>> Can anyone give me pointers on what I'd need to do to safepass' build > >>>>>> scripts to get this working in mirage-xen, or at the least some > >>>>>> clarification on why it doesn't work as-is and how cross compilation > >>>>>> works for C libraries used in mirage-xen? > > Correct: Mirage on Xen does not use shared libraries. I don't know how > > to prevent them from being built. The easiest option might be to > > remove the uses of errno from the library (it doesn't look like the > > OCaml bindings do anything with it anyway). > > The ocaml bindings (bcrypt=5Fstub.c) doesn't, but the C code compiled > with it (crypt=5Fblowfish.c) does, so I can't just remove it sadly. > > So this is a bit ridiculous, but I did manage to get it compiling with > the following hack in the build script: > > mkdir fake=5Flibc > echo '"fake=5Flibc": -traverse' >> =5Ftags > touch fake=5Flibc/libc.c > gcc -shared -nostdlib -o fake=5Flibc/libc.so fake=5Flibc/libc.c > > (and also added -L$PWD/fake=5Flibc to oasis' CCLib field) > I'm not sure if this will help, but I thought I'd share my "workaround" for compiling C files from Mirage components to link against Solo5(https://github.com/djwillia/solo5/tree/mirage), which you can think of as a layer like Mini-OS. The ability to send flags to C programs from OASIS seems a bit limited to me: I would have liked to specify the cross compiler, but I'm not sure if that's possible. I don't really know what the right way to do this is, but I ended up adding a lot of CFLAGS from the kernel build: CCOpt: -ffreestanding -mcmodel=3Dlarge -mno-red-zone -mno-3dnow \ -std=3Dgnu99 -O2 -Wall -Wextra -Werror -D=5F=5FSOLO5=5F=5F = \ -fno-PIC -g -I/home/solo5/solo5/kernel ( see https://github.com/djwillia/mirage-block-solo5/blob/solo5/=5Foasis#L17 ) Then I link against the resulting libmirage=5Fblock=5Fsolo5=5Fstubs.a and all of the static libraries listed out from e.g., `pkg-config --static --libs mirage-xen` Dan --0__=8FBBF5ABDFDC3B8D8f9e8a93df938690918c8FBBF5ABDFDC3B8D Content-Transfer-Encoding: quoted-printable Content-type: text/html; charset=US-ASCII Content-Disposition: inline

 
> On Mon, Jan 11, 2016 at 9:48 PM, Thomas L= eonard <talex5@gmail.com> wrote:
> > On 11 January 2016 at 0= 9:06, Tim Cuthbertson <tim@gfxmonk.net> wrote:
> >> On Mo= n, Jan 11, 2016 at 4:52 AM, Thomas Leonard <talex5@gmail.com> wrote:<= br>> >>> On 10 January 2016 at 10:15, Tim Cuthbertson <tim@g= fxmonk.net> wrote:
> >>>> On Fri, Jan 8, 2016 at 11:14= PM, Thomas Leonard <talex5@gmail.com> wrote:
> >>>>= ;> On 8 January 2016 at 11:19, Tim Cuthbertson <tim@gfxmonk.net> w= rote:

> >>>>>>  - I don't really = know what the thing I'm doing is. Is mirage-xen a
> >>>>&= gt;> different architecture? A different ABI? Do C libraries need to be<= br>> >>>>>> cross-compiled, or just compiled with part= icular flags so that they'll
> >>>>>> work on xen-m= inios instead of gnu/linux?
> >>>>>
> >>&g= t;>> C libraries need to be compiled with different headers and flags= (in
> >>>>> particular, -mno-red-zone). Using librari= es compiled for Linux will
> >>>>> often appear to wor= k, but may fail when interrupts occur, so the build
> >>>>= ;> makes it hard to use them by accident.
> >>>>>> >>>>> However, OCaml binaries can be shared (ocamlopt= doesn't use a red zone
> >>>>> and the OCaml ABI is t= he same).
> >>>>>
> >>>>>> &nb= sp;- The existing scripts seem to be pretty ad-hoc - zarith gets away
&g= t; >>>>>> mainly with particular CFLAGS
> >>&= gt;>>> (https://github.com/ocaml/opam-repository/blob/master/
> p= ackages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh),
> >>= ;>>>
> >>>>> It's using pkg-config to get the= important flags. The others are
> >>>>> optimisations= (except -fno-builtin, which is either not needed or
> >>>&g= t;> should be supplied by Mini-OS).
> >>>>>
>= >>>>>> while gmp looks like a full cross-compilation usi= ng `--target` (and
> >>>>>> then does some other sn= eaky things).
> >>>>>>
> >>>>>= > safepass uses OASIS for its build system, which doesn't seem to have> >>>>>> any cross-compilation functionality built i= n as far as I could tell.
> >>>>>> Can anyone give = me pointers on what I'd need to do to safepass' build
> >>>&= gt;>> scripts to get this working in mirage-xen, or at the least some=
> >>>>>> clarification on why it doesn't work as-i= s and how cross compilation
> >>>>>> works for C li= braries used in mirage-xen?


> > Correct: Mirage o= n Xen does not use shared libraries. I don't know how
> > to preve= nt them from being built. The easiest option might be to
> > remov= e the uses of errno from the library (it doesn't look like the
> >= OCaml bindings do anything with it anyway).
>
> The ocaml bin= dings (bcrypt=5Fstub.c) doesn't, but the C code compiled
> with it (c= rypt=5Fblowfish.c) does, so I can't just remove it sadly.
>
> = So this is a bit ridiculous, but I did manage to get it compiling with
&= gt; the following hack in the build script:
>
>   mkdir f= ake=5Flibc
>   echo '"fake=5Flibc": -traverse' >>= ; =5Ftags
>   touch fake=5Flibc/libc.c
>   gcc -share= d -nostdlib -o fake=5Flibc/libc.so fake=5Flibc/libc.c
>
> (and= also added -L$PWD/fake=5Flibc to oasis' CCLib field)
>

I'm n= ot sure if this will help, but I thought I'd share my
"wor= karound" for compiling C files from Mirage components to link
= against Solo5(https://github.com/djwillia/solo5/tree/mirage), whic= h
you can think of as a layer like Mini-OS.

The= ability to send flags to C programs from OASIS seems a bit limitedto me: I would have liked to specify the cross compiler, but I'm not
sure if that's possible.  I don't really know what the righ= t way to do
this is, but I ended up adding a lot of CFLAGS from= the kernel build:

    CCOpt: -ffreestanding -mcm= odel=3Dlarge -mno-red-zone -mno-3dnow \
      &n= bsp;    -std=3Dgnu99 -O2 -Wall -Wextra -Werror -D=5F=5FSOLO5=5F= =5F       \
          &= nbsp;-fno-PIC -g   -I/home/solo5/solo5/kernel

( see https://github.com/djwillia/mirage-block-solo5/blob/solo5/= =5Foasis#L17 )

Then I link against the re= sulting libmirage=5Fblock=5Fsolo5=5Fstubs.a and
all of the stat= ic libraries listed out from e.g., `pkg-config --static
--libs = mirage-xen`

Dan
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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256/256) Tue, 12 Jan 2016 10:17:19 -0500 Received: from /spool/local by smtp.notes.na.collabserv.com with smtp.notes.na.collabserv.com ESMTP for from ; Tue, 12 Jan 2016 15:17:07 -0000 Received: from us1a3-smtp02.a3.dal06.isc4sb.com (10.106.154.103) by smtp.notes.na.collabserv.com (10.106.227.16) with smtp.notes.na.collabserv.com ESMTP; Tue, 12 Jan 2016 15:17:04 -0000 Received: from us1a3-mail131.a3.dal06.isc4sb.com ([10.146.45.162]) by us1a3-smtp02.a3.dal06.isc4sb.com with ESMTP id 2016011215175959-296372 ; Tue, 12 Jan 2016 15:17:59 +0000 In-Reply-To: To: mirageos-devel@lists.xenproject.org From: "Daniel J Williams" Date: Tue, 12 Jan 2016 10:17:00 -0500 References: X-KeepSent: BCA0FAC2:9AC46590-00257F38:004FBD1D; type=4; name=$KeepSent X-Mailer: IBM Notes Release 9.0.1FP3 SHF226 March 23, 2015 X-LLNOutbound: False X-Disclaimed: 2663 X-TNEFEvaluated: 1 x-cbid: 16011215-0045-0000-0000-0000030BB4F4 X-IBM-ISS-SpamDetectors: Score=0.415652; BY=0.114741; FL=0; FP=0; FZ=0; HX=0; KW=0; PH=0; SC=0.415652; ST=0; TS=0; UL=0; ISC= X-IBM-ISS-DetailInfo: BY=3.00004779; HX=3.00000239; KW=3.00000007; PH=3.00000004; SC=3.00000131; SDB=6.00644246; UDB=6.00290434; UTC=2016-01-12 15:17:06 x-cbparentid: 16011215-5938-0000-0000-0000019BAE84 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============6521540081912680320==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============6521540081912680320== Content-type: multipart/alternative; Boundary="0__=8FBBF5ABDFDC3B8D8f9e8a93df938690918c8FBBF5ABDFDC3B8D" Content-Disposition: inline --0__=8FBBF5ABDFDC3B8D8f9e8a93df938690918c8FBBF5ABDFDC3B8D Content-Transfer-Encoding: quoted-printable Content-type: text/plain; charset=US-ASCII > On Mon, Jan 11, 2016 at 9:48 PM, Thomas Leonard wrote: > > On 11 January 2016 at 09:06, Tim Cuthbertson wrote: > >> On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard wrote: > >>> On 10 January 2016 at 10:15, Tim Cuthbertson wrote: > >>>> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard wrote: > >>>>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: > >>>>>> - I don't really know what the thing I'm doing is. Is mirage-xen a > >>>>>> different architecture? A different ABI? Do C libraries need to be > >>>>>> cross-compiled, or just compiled with particular flags so that they'll > >>>>>> work on xen-minios instead of gnu/linux? > >>>>> > >>>>> C libraries need to be compiled with different headers and flags (in > >>>>> particular, -mno-red-zone). Using libraries compiled for Linux will > >>>>> often appear to work, but may fail when interrupts occur, so the build > >>>>> makes it hard to use them by accident. > >>>>> > >>>>> However, OCaml binaries can be shared (ocamlopt doesn't use a red zone > >>>>> and the OCaml ABI is the same). > >>>>> > >>>>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away > >>>>>> mainly with particular CFLAGS > >>>>>> (https://github.com/ocaml/opam-repository/blob/master/ > packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), > >>>>> > >>>>> It's using pkg-config to get the important flags. The others are > >>>>> optimisations (except -fno-builtin, which is either not needed or > >>>>> should be supplied by Mini-OS). > >>>>> > >>>>>> while gmp looks like a full cross-compilation using `--target` (and > >>>>>> then does some other sneaky things). > >>>>>> > >>>>>> safepass uses OASIS for its build system, which doesn't seem to have > >>>>>> any cross-compilation functionality built in as far as I could tell. > >>>>>> Can anyone give me pointers on what I'd need to do to safepass' build > >>>>>> scripts to get this working in mirage-xen, or at the least some > >>>>>> clarification on why it doesn't work as-is and how cross compilation > >>>>>> works for C libraries used in mirage-xen? > > Correct: Mirage on Xen does not use shared libraries. I don't know how > > to prevent them from being built. The easiest option might be to > > remove the uses of errno from the library (it doesn't look like the > > OCaml bindings do anything with it anyway). > > The ocaml bindings (bcrypt=5Fstub.c) doesn't, but the C code compiled > with it (crypt=5Fblowfish.c) does, so I can't just remove it sadly. > > So this is a bit ridiculous, but I did manage to get it compiling with > the following hack in the build script: > > mkdir fake=5Flibc > echo '"fake=5Flibc": -traverse' >> =5Ftags > touch fake=5Flibc/libc.c > gcc -shared -nostdlib -o fake=5Flibc/libc.so fake=5Flibc/libc.c > > (and also added -L$PWD/fake=5Flibc to oasis' CCLib field) > I'm not sure if this will help, but I thought I'd share my "workaround" for compiling C files from Mirage components to link against Solo5(https://github.com/djwillia/solo5/tree/mirage), which you can think of as a layer like Mini-OS. The ability to send flags to C programs from OASIS seems a bit limited to me: I would have liked to specify the cross compiler, but I'm not sure if that's possible. I don't really know what the right way to do this is, but I ended up adding a lot of CFLAGS from the kernel build: CCOpt: -ffreestanding -mcmodel=3Dlarge -mno-red-zone -mno-3dnow \ -std=3Dgnu99 -O2 -Wall -Wextra -Werror -D=5F=5FSOLO5=5F=5F = \ -fno-PIC -g -I/home/solo5/solo5/kernel ( see https://github.com/djwillia/mirage-block-solo5/blob/solo5/=5Foasis#L17 ) Then I link against the resulting libmirage=5Fblock=5Fsolo5=5Fstubs.a and all of the static libraries listed out from e.g., `pkg-config --static --libs mirage-xen` Dan --0__=8FBBF5ABDFDC3B8D8f9e8a93df938690918c8FBBF5ABDFDC3B8D Content-Transfer-Encoding: quoted-printable Content-type: text/html; charset=US-ASCII Content-Disposition: inline

 
> On Mon, Jan 11, 2016 at 9:48 PM, Thomas L= eonard <talex5@gmail.com> wrote:
> > On 11 January 2016 at 0= 9:06, Tim Cuthbertson <tim@gfxmonk.net> wrote:
> >> On Mo= n, Jan 11, 2016 at 4:52 AM, Thomas Leonard <talex5@gmail.com> wrote:<= br>> >>> On 10 January 2016 at 10:15, Tim Cuthbertson <tim@g= fxmonk.net> wrote:
> >>>> On Fri, Jan 8, 2016 at 11:14= PM, Thomas Leonard <talex5@gmail.com> wrote:
> >>>>= ;> On 8 January 2016 at 11:19, Tim Cuthbertson <tim@gfxmonk.net> w= rote:

> >>>>>>  - I don't really = know what the thing I'm doing is. Is mirage-xen a
> >>>>&= gt;> different architecture? A different ABI? Do C libraries need to be<= br>> >>>>>> cross-compiled, or just compiled with part= icular flags so that they'll
> >>>>>> work on xen-m= inios instead of gnu/linux?
> >>>>>
> >>&g= t;>> C libraries need to be compiled with different headers and flags= (in
> >>>>> particular, -mno-red-zone). Using librari= es compiled for Linux will
> >>>>> often appear to wor= k, but may fail when interrupts occur, so the build
> >>>>= ;> makes it hard to use them by accident.
> >>>>>> >>>>> However, OCaml binaries can be shared (ocamlopt= doesn't use a red zone
> >>>>> and the OCaml ABI is t= he same).
> >>>>>
> >>>>>> &nb= sp;- The existing scripts seem to be pretty ad-hoc - zarith gets away
&g= t; >>>>>> mainly with particular CFLAGS
> >>&= gt;>>> (https://github.com/ocaml/opam-repository/blob/master/
> p= ackages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh),
> >>= ;>>>
> >>>>> It's using pkg-config to get the= important flags. The others are
> >>>>> optimisations= (except -fno-builtin, which is either not needed or
> >>>&g= t;> should be supplied by Mini-OS).
> >>>>>
>= >>>>>> while gmp looks like a full cross-compilation usi= ng `--target` (and
> >>>>>> then does some other sn= eaky things).
> >>>>>>
> >>>>>= > safepass uses OASIS for its build system, which doesn't seem to have> >>>>>> any cross-compilation functionality built i= n as far as I could tell.
> >>>>>> Can anyone give = me pointers on what I'd need to do to safepass' build
> >>>&= gt;>> scripts to get this working in mirage-xen, or at the least some=
> >>>>>> clarification on why it doesn't work as-i= s and how cross compilation
> >>>>>> works for C li= braries used in mirage-xen?


> > Correct: Mirage o= n Xen does not use shared libraries. I don't know how
> > to preve= nt them from being built. The easiest option might be to
> > remov= e the uses of errno from the library (it doesn't look like the
> >= OCaml bindings do anything with it anyway).
>
> The ocaml bin= dings (bcrypt=5Fstub.c) doesn't, but the C code compiled
> with it (c= rypt=5Fblowfish.c) does, so I can't just remove it sadly.
>
> = So this is a bit ridiculous, but I did manage to get it compiling with
&= gt; the following hack in the build script:
>
>   mkdir f= ake=5Flibc
>   echo '"fake=5Flibc": -traverse' >>= ; =5Ftags
>   touch fake=5Flibc/libc.c
>   gcc -share= d -nostdlib -o fake=5Flibc/libc.so fake=5Flibc/libc.c
>
> (and= also added -L$PWD/fake=5Flibc to oasis' CCLib field)
>

I'm n= ot sure if this will help, but I thought I'd share my
"wor= karound" for compiling C files from Mirage components to link
= against Solo5(https://github.com/djwillia/solo5/tree/mirage), whic= h
you can think of as a layer like Mini-OS.

The= ability to send flags to C programs from OASIS seems a bit limitedto me: I would have liked to specify the cross compiler, but I'm not
sure if that's possible.  I don't really know what the righ= t way to do
this is, but I ended up adding a lot of CFLAGS from= the kernel build:

    CCOpt: -ffreestanding -mcm= odel=3Dlarge -mno-red-zone -mno-3dnow \
      &n= bsp;    -std=3Dgnu99 -O2 -Wall -Wextra -Werror -D=5F=5FSOLO5=5F= =5F       \
          &= nbsp;-fno-PIC -g   -I/home/solo5/solo5/kernel

( see https://github.com/djwillia/mirage-block-solo5/blob/solo5/= =5Foasis#L17 )

Then I link against the re= sulting libmirage=5Fblock=5Fsolo5=5Fstubs.a and
all of the stat= ic libraries listed out from e.g., `pkg-config --static
--libs = mirage-xen`

Dan
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Wed, 13 Jan 2016 15:53:50 +0000 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Amir Chaudhry In-Reply-To: Date: Wed, 13 Jan 2016 07:53:47 -0800 Message-Id: <530E7F74-0F62-4561-8EEC-692198366471@cam.ac.uk> References: To: mirageos-devel X-Mailer: Apple Mail (2.2104) Subject: Re: [MirageOS-devel] MirageOS fortnightly call - Wednesday 13th Jan at 4pm GMT X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org VGhlIGxpbmsgZm9yIHRoZSBjYWxsIGlzIGh0dHBzOi8vbWVldC5qaXQuc2kvTWlyYWdlT1MKCj4g T24gMTEgSmFuIDIwMTYsIGF0IDIwOjAxLCBBbWlyIENoYXVkaHJ5IDxhbWM3OUBjYW0uYWMudWs+ IHdyb3RlOgo+IAo+IEhpIGZvbGtzLAo+IAo+IFRoZSBmaXJzdCBNaXJhZ2VPUyBjYWxsIG9mIDIw MTYgd2lsbCB0YWtlIHBsYWNlIG9uIFdlZG5lc2RheSBhZnRlcm5vb24gYXQgNHBtIEdNVCBhbmQg aXMgb3BlbiB0byBhbGwuCj4gCj4gSeKAmWxsIHBvc3QgdGhlIGxpbmsgc2hvcnRseSBiZWZvcmUg dGhlIGNhbGwsIGJvdGggaGVyZSBhbmQgYWxzbyBpbiB0aGUgSVJDIGNoYW5uZWwgKCNtaXJhZ2Ug b24gZnJlZW5vZGUpIFtoaW50OiBpdOKAmWxsIGJlIHRoZSBzYW1lIGFzIGxhc3QgdGltZV0KPiAK PiBUaGUgYWdlbmRhIGlzIGN1cnJlbnRseSBhcyBmb2xsb3dzOgo+IAo+IOKAoiBRdWFsaXR5IGFu ZCBUZXN0Cj4g4oCiIEZ1bmN0b3JpYSByZWxlYXNlIHN0YXR1cwo+IOKAoiBNaXJhZ2VPUyBoYWNr YXRob24gc3RhdHVzCj4g4oCiIExJQ0VOU0UgZmlsZXMKPiDigKIgTWlyYWdlT1MgdGFsa3MgYXQg U0NBTEV4MTQKPiDigKIgSXJtaW4gYmxvZyBwb3N0cz8KPiAKPiBQbGVhc2UgZG8gYWRkIGl0ZW1z IHZpYSBodHRwczovL2dpdGh1Yi5jb20vbWlyYWdlL21pcmFnZS13d3cvd2lraS9DYWxsLUFnZW5k YQo+IAo+IEpvaW4gdXMgYXQgNHBtIEdNVCBvbiBXZWRuZXNkYXkhCj4gCj4gQmVzdCB3aXNoZXMs Cj4gQW1pcgoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f Ck1pcmFnZU9TLWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9q ZWN0Lm9yZwpodHRwOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3Rp bmZvL21pcmFnZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Wed Jan 13 16:38:52 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 13 Jan 2016 16:38:52 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJORd-0007rl-9i; 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[94.192.160.173]) by smtp.gmail.com with ESMTPSA id 193sm22947246wmg.16.2016.01.13.08.38.44 for (version=TLSv1/SSLv3 cipher=OTHER); Wed, 13 Jan 2016 08:38:44 -0800 (PST) From: Lars Kurth Message-Id: <5649DC2E-8FD1-43D3-8DCD-65AE3441DC17@gmail.com> Date: Wed, 13 Jan 2016 16:38:44 +0000 To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) X-Mailer: Apple Mail (2.2104) Subject: [MirageOS-devel] Xen Project Hackathon, Cambridge UK, Apr 18-19 - registration, hotels and other information X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Xen API mailing list Hi all, I just put together the booking page for the next Hackathon. See http://wiki.xenproject.org/wiki/Hackathon/April2016 for more information. * If you are a maintainer or otherwise a core member of the community, just add yourself to the Confirmed Attendees section stating your name and organisation. You can also use the {{Invite|Name|Org|IRC handle|arrival date|leave date|lodging}} template to provide more information with the aim to co-ordinate travel and find people staying in the same hotel as you. * If you are not a maintainer or known member of the community, please add yourself the Request invitation section. If your email address is not known in the Xen Community, please also add the name of your employer and send your e-mail address to community dot manager at xenproject dot org using "Request for Hackathon 2016 Invite" as subject line. This is important, such that we can e-mail more information to you. We will monitor this page and confirm whether we have space for you to attend. Best Regards Lars _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 13 16:38:52 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 13 Jan 2016 16:38:52 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJORd-0007rl-9i; Wed, 13 Jan 2016 16:38:49 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJORb-0007rW-47 for mirageos-devel@lists.xenproject.org; Wed, 13 Jan 2016 16:38:47 +0000 Received: from [85.158.139.211] by server-11.bemta-5.messagelabs.com id 9F/1D-24494-69D76965; Wed, 13 Jan 2016 16:38:46 +0000 X-Env-Sender: lars.kurth.xen@gmail.com X-Msg-Ref: server-15.tower-206.messagelabs.com!1452703125!15389139!1 X-Originating-IP: [74.125.82.43] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 21382 invoked from network); 13 Jan 2016 16:38:45 -0000 Received: from mail-wm0-f43.google.com (HELO mail-wm0-f43.google.com) (74.125.82.43) by server-15.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 13 Jan 2016 16:38:45 -0000 Received: by mail-wm0-f43.google.com with SMTP id b14so381110503wmb.1 for ; Wed, 13 Jan 2016 08:38:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:content-transfer-encoding:subject:message-id:date :to:mime-version; bh=hhUbijkJDoHQCoETkzlECerimhMhGQcBzVcDm7ZImgs=; b=aJc3uZU79z/5MhnOvrKu7Y6tbRM9kKkNnyG+prKCNS4mbG4ZoeHf0K1D2LMtUUx3mk LCRogbfg/HEK/akfgxIs5187wl1+xCcS6feYxJh2vM6llhNH6nX/UmdMPg5cI/lg2GnB FTDvl07r2Y/c4I95uasxHxMzgX82RVAEMbat/wesk8gbsWE4gsIgFxrXuq3j0QUgLCiv 7QKZp/xOiiWG2ymC5c9s5aJ/ap5Tmas6NKF4wS4bGhi07UkMUioOtnRg02g3l0vCAA1o SsXVAiQvOokVe6YVDcrMpLBrcc1y3MIglddXbjN6PTyVH3fvHfAouhDzlU0Yy9iv4Y8q HYLA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:content-type:content-transfer-encoding :subject:message-id:date:to:mime-version; bh=hhUbijkJDoHQCoETkzlECerimhMhGQcBzVcDm7ZImgs=; b=ZgCZqd6mplqO+65OzSRxpQNgcRQ1DTJpUTcGjbXdZJwSed4YUSFPC1T1KzSwk+0S7l EuCmfuYJwEApKYhgXilxGi/pTkKueu/Rarub/E9lubSYZnsNWlvswIBs8fPz0+qmYW/O PuM95bIGjUs00ROP8n0Ji9hZTNKjHoauwsMvqo5C8hJkLMd4FDaUMTa7sNog+hwyTAFN i9BPWU9kniIq45lWXzcaQBCjjLXcvC/47Ppjg9r6ybWJuHi5ewixM3gWBiyhsAGpaJbC zAy9bovDl2SMjgBu3hlwXlT2lxtE6RLadVCcSv3dvw3wWIn+ynG7JV8hrG43N8NmmAm7 fikg== X-Gm-Message-State: ALoCoQnI/lRZEe7SVPAaIptGJRPd7QzkM/xQcqotlY/gkKN06P165zotDLP2ngBTyp4sE5wdahfG+s47b+wH9TNv8itLWfFdYQ== X-Received: by 10.28.145.204 with SMTP id t195mr27715846wmd.91.1452703125491; Wed, 13 Jan 2016 08:38:45 -0800 (PST) Received: from [192.168.0.12] (5ec0a0ad.skybroadband.com. [94.192.160.173]) by smtp.gmail.com with ESMTPSA id 193sm22947246wmg.16.2016.01.13.08.38.44 for (version=TLSv1/SSLv3 cipher=OTHER); Wed, 13 Jan 2016 08:38:44 -0800 (PST) From: Lars Kurth Message-Id: <5649DC2E-8FD1-43D3-8DCD-65AE3441DC17@gmail.com> Date: Wed, 13 Jan 2016 16:38:44 +0000 To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) X-Mailer: Apple Mail (2.2104) Subject: [MirageOS-devel] Xen Project Hackathon, Cambridge UK, Apr 18-19 - registration, hotels and other information X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Xen API mailing list Hi all, I just put together the booking page for the next Hackathon. See http://wiki.xenproject.org/wiki/Hackathon/April2016 for more information. * If you are a maintainer or otherwise a core member of the community, just add yourself to the Confirmed Attendees section stating your name and organisation. You can also use the {{Invite|Name|Org|IRC handle|arrival date|leave date|lodging}} template to provide more information with the aim to co-ordinate travel and find people staying in the same hotel as you. * If you are not a maintainer or known member of the community, please add yourself the Request invitation section. If your email address is not known in the Xen Community, please also add the name of your employer and send your e-mail address to community dot manager at xenproject dot org using "Request for Hackathon 2016 Invite" as subject line. This is important, such that we can e-mail more information to you. We will monitor this page and confirm whether we have space for you to attend. Best Regards Lars _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 12:17:50 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 12:17:50 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJgqS-0004kd-8f; Thu, 14 Jan 2016 12:17:40 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIP4m-0006DL-LA for mirageos-devel@lists.xenproject.org; Sun, 10 Jan 2016 23:07:08 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 35/CB-08977-B14E2965; Sun, 10 Jan 2016 23:07:07 +0000 X-Env-Sender: bgoumas@gmail.com X-Msg-Ref: server-16.tower-21.messagelabs.com!1452467226!4928186!1 X-Originating-IP: [74.125.82.48] X-SpamReason: No, hits=1.2 required=7.0 tests=HTML_20_30,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 41839 invoked from network); 10 Jan 2016 23:07:07 -0000 Received: from mail-wm0-f48.google.com (HELO mail-wm0-f48.google.com) (74.125.82.48) by server-16.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 10 Jan 2016 23:07:07 -0000 Received: by mail-wm0-f48.google.com with SMTP id f206so244044142wmf.0 for ; Sun, 10 Jan 2016 15:07:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=2MfLCa8rJy1uz/e0U5fY8rp4BKQdK1BN+gkKqv8daX4=; b=nryTdG2v/ncCj3puFi4n7omUXkMwEzdGzYmNsI8V7ZbLRwHRVl785cxlEF1FL8kkhk xaCt+ytg0Zo83CDm1+6ej55fncup1isWEk2v0Ucwy1ykJW10fzKDOEQKaeUE7AXamdsm RSTU6rA017EHILVXBqgXcTJFdt7YP0HT5sPu+LHyE2BqRxjbAXlEjnHjiD3EFhKaTB/I /6h1b1/SeNkRW4qrbTGM7Q/MJlmrT8c7qS0PtzkC+SMqHvte22i1fFexJKL29M4uMS0n 3kjr2PXh351DSwMtWqCbqghQclcxZuNEsL1kD9BcpSJ2VyClitymIFsCUdPj37M0rCEr fbWQ== MIME-Version: 1.0 X-Received: by 10.28.55.76 with SMTP id e73mr10807126wma.53.1452467226577; Sun, 10 Jan 2016 15:07:06 -0800 (PST) Received: by 10.28.133.69 with HTTP; Sun, 10 Jan 2016 15:07:06 -0800 (PST) Date: Mon, 11 Jan 2016 01:07:06 +0200 Message-ID: From: Vasilis Goumas To: mirageos-devel@lists.xenproject.org X-Mailman-Approved-At: Thu, 14 Jan 2016 12:17:39 +0000 Subject: [MirageOS-devel] beginner contributing to mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0911294703221547137==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============0911294703221547137== Content-Type: multipart/alternative; boundary=001a1143ab92168f78052902e129 --001a1143ab92168f78052902e129 Content-Type: text/plain; charset=UTF-8 Greetings, My name is Vasilis and I am a computer engineering student. Recently I discovered MirageOS project and I am since quite interested in it. So I would like contributing some code. I have beginner Ocaml skills and I have never taken part in a software project that big, so I view this also as an opportunity to sharpen these skills. A beginner project I encountered is "local synchronization between git repos", the first one noted under the category "storage" in [1]. Ideally, pairing me up with a mentor for completing the above, or other beginner task would be cool :) [1] https://github.com/mirage/mirage-www/wiki/Pioneer-Projects Thank you for your time, Vasilis Goumas --001a1143ab92168f78052902e129 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Greetings,

My name is Vasilis and I am = a computer engineering student.=C2=A0

Recently I d= iscovered MirageOS project and I am since quite interested in it. So I woul= d like contributing some code.

I have beginner Oca= ml skills and I have never taken part in a software project that big, so I = view this also as an opportunity to sharpen these skills.

A beginner project I encountered is "local synchronization bet= ween git repos", the first one noted under the category "storage&= quot; in [1].

Ideally, pairing me up with a mentor= for completing the above, or other beginner task would be cool :)


Thank you for your time,
= Vasilis Goumas
--001a1143ab92168f78052902e129-- --===============0911294703221547137== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============0911294703221547137==-- From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 12:17:50 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 12:17:50 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJgqS-0004ki-DD; Thu, 14 Jan 2016 12:17:40 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJQ2n-00045d-BJ for mirageos-devel@lists.xenproject.org; Wed, 13 Jan 2016 18:21:17 +0000 Received: from [85.158.137.68] by server-10.bemta-3.messagelabs.com id C0/0D-02807-C9596965; Wed, 13 Jan 2016 18:21:16 +0000 X-Env-Sender: arnaud.sahuguet@cornell.edu X-Msg-Ref: server-15.tower-31.messagelabs.com!1452709275!15369974!1 X-Originating-IP: [128.84.13.243] X-SpamReason: No, hits=0.3 required=7.0 tests=HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 37611 invoked from network); 13 Jan 2016 18:21:15 -0000 Received: from limerock03.mail.cornell.edu (HELO limerock03.mail.cornell.edu) (128.84.13.243) by server-15.tower-31.messagelabs.com with SMTP; 13 Jan 2016 18:21:15 -0000 X-CornellRouted: This message has been Routed already. Received: from authusersmtp.mail.cornell.edu (granite4.serverfarm.cornell.edu [10.16.197.9]) by limerock03.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id u0DILEoq028712 for ; Wed, 13 Jan 2016 13:21:15 -0500 Received: from mail-lb0-f180.google.com (mail-lb0-f180.google.com [209.85.217.180]) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id u0DILCiN021162 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Wed, 13 Jan 2016 13:21:14 -0500 Received: by mail-lb0-f180.google.com with SMTP id oh2so296134120lbb.3 for ; Wed, 13 Jan 2016 10:21:14 -0800 (PST) X-Gm-Message-State: ALoCoQmKovNSdnT2EWAPom0DRK2TbG5vTSuuroZcbW2x8bfXt4Vb26zEp4sQM+mE8OgADw8O+be8o0g9h8ihVxIsmzUyEzKAsQ== X-Received: by 10.112.161.33 with SMTP id xp1mr51447663lbb.141.1452709272669; Wed, 13 Jan 2016 10:21:12 -0800 (PST) MIME-Version: 1.0 Received: by 10.112.235.1 with HTTP; Wed, 13 Jan 2016 10:20:53 -0800 (PST) From: Arnaud Sahuguet Date: Wed, 13 Jan 2016 13:20:53 -0500 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org X-Mailman-Approved-At: Thu, 14 Jan 2016 12:17:39 +0000 Subject: [MirageOS-devel] What crypto libraries are available on/for the platform? X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6699052050879128355==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============6699052050879128355== Content-Type: multipart/alternative; boundary=001a11c3487428da0a05293b3c8b --001a11c3487428da0a05293b3c8b Content-Type: text/plain; charset=UTF-8 Hi, what are the crypto libraries available for MirageOS? I am interested in: - elliptic curves - bilinear pairing-friendly elliptic curves - and the usual stuff, HMAC, SHA-xxxx regards, Arnaud --001a11c3487428da0a05293b3c8b Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi,

what are the crypto libraries avail= able for MirageOS?
I am interested in:
-=C2=A0ellip= tic curves
- bilinear pairing-friendly elliptic curves=
- and the usual stuff, HMAC, SHA-xxxx

regards,

Arnaud
--001a11c3487428da0a05293b3c8b-- --===============6699052050879128355== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============6699052050879128355==-- From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 12:17:50 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 12:17:50 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJgqS-0004kd-8f; Thu, 14 Jan 2016 12:17:40 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIP4m-0006DL-LA for mirageos-devel@lists.xenproject.org; Sun, 10 Jan 2016 23:07:08 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 35/CB-08977-B14E2965; Sun, 10 Jan 2016 23:07:07 +0000 X-Env-Sender: bgoumas@gmail.com X-Msg-Ref: server-16.tower-21.messagelabs.com!1452467226!4928186!1 X-Originating-IP: [74.125.82.48] X-SpamReason: No, hits=1.2 required=7.0 tests=HTML_20_30,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 41839 invoked from network); 10 Jan 2016 23:07:07 -0000 Received: from mail-wm0-f48.google.com (HELO mail-wm0-f48.google.com) (74.125.82.48) by server-16.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 10 Jan 2016 23:07:07 -0000 Received: by mail-wm0-f48.google.com with SMTP id f206so244044142wmf.0 for ; Sun, 10 Jan 2016 15:07:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=2MfLCa8rJy1uz/e0U5fY8rp4BKQdK1BN+gkKqv8daX4=; b=nryTdG2v/ncCj3puFi4n7omUXkMwEzdGzYmNsI8V7ZbLRwHRVl785cxlEF1FL8kkhk xaCt+ytg0Zo83CDm1+6ej55fncup1isWEk2v0Ucwy1ykJW10fzKDOEQKaeUE7AXamdsm RSTU6rA017EHILVXBqgXcTJFdt7YP0HT5sPu+LHyE2BqRxjbAXlEjnHjiD3EFhKaTB/I /6h1b1/SeNkRW4qrbTGM7Q/MJlmrT8c7qS0PtzkC+SMqHvte22i1fFexJKL29M4uMS0n 3kjr2PXh351DSwMtWqCbqghQclcxZuNEsL1kD9BcpSJ2VyClitymIFsCUdPj37M0rCEr fbWQ== MIME-Version: 1.0 X-Received: by 10.28.55.76 with SMTP id e73mr10807126wma.53.1452467226577; Sun, 10 Jan 2016 15:07:06 -0800 (PST) Received: by 10.28.133.69 with HTTP; Sun, 10 Jan 2016 15:07:06 -0800 (PST) Date: Mon, 11 Jan 2016 01:07:06 +0200 Message-ID: From: Vasilis Goumas To: mirageos-devel@lists.xenproject.org X-Mailman-Approved-At: Thu, 14 Jan 2016 12:17:39 +0000 Subject: [MirageOS-devel] beginner contributing to mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0911294703221547137==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============0911294703221547137== Content-Type: multipart/alternative; boundary=001a1143ab92168f78052902e129 --001a1143ab92168f78052902e129 Content-Type: text/plain; charset=UTF-8 Greetings, My name is Vasilis and I am a computer engineering student. Recently I discovered MirageOS project and I am since quite interested in it. So I would like contributing some code. I have beginner Ocaml skills and I have never taken part in a software project that big, so I view this also as an opportunity to sharpen these skills. A beginner project I encountered is "local synchronization between git repos", the first one noted under the category "storage" in [1]. Ideally, pairing me up with a mentor for completing the above, or other beginner task would be cool :) [1] https://github.com/mirage/mirage-www/wiki/Pioneer-Projects Thank you for your time, Vasilis Goumas --001a1143ab92168f78052902e129 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Greetings,

My name is Vasilis and I am = a computer engineering student.=C2=A0

Recently I d= iscovered MirageOS project and I am since quite interested in it. So I woul= d like contributing some code.

I have beginner Oca= ml skills and I have never taken part in a software project that big, so I = view this also as an opportunity to sharpen these skills.

A beginner project I encountered is "local synchronization bet= ween git repos", the first one noted under the category "storage&= quot; in [1].

Ideally, pairing me up with a mentor= for completing the above, or other beginner task would be cool :)


Thank you for your time,
= Vasilis Goumas
--001a1143ab92168f78052902e129-- --===============0911294703221547137== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============0911294703221547137==-- From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 12:17:50 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 12:17:50 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJgqS-0004ki-DD; Thu, 14 Jan 2016 12:17:40 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJQ2n-00045d-BJ for mirageos-devel@lists.xenproject.org; Wed, 13 Jan 2016 18:21:17 +0000 Received: from [85.158.137.68] by server-10.bemta-3.messagelabs.com id C0/0D-02807-C9596965; Wed, 13 Jan 2016 18:21:16 +0000 X-Env-Sender: arnaud.sahuguet@cornell.edu X-Msg-Ref: server-15.tower-31.messagelabs.com!1452709275!15369974!1 X-Originating-IP: [128.84.13.243] X-SpamReason: No, hits=0.3 required=7.0 tests=HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 37611 invoked from network); 13 Jan 2016 18:21:15 -0000 Received: from limerock03.mail.cornell.edu (HELO limerock03.mail.cornell.edu) (128.84.13.243) by server-15.tower-31.messagelabs.com with SMTP; 13 Jan 2016 18:21:15 -0000 X-CornellRouted: This message has been Routed already. Received: from authusersmtp.mail.cornell.edu (granite4.serverfarm.cornell.edu [10.16.197.9]) by limerock03.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id u0DILEoq028712 for ; Wed, 13 Jan 2016 13:21:15 -0500 Received: from mail-lb0-f180.google.com (mail-lb0-f180.google.com [209.85.217.180]) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id u0DILCiN021162 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Wed, 13 Jan 2016 13:21:14 -0500 Received: by mail-lb0-f180.google.com with SMTP id oh2so296134120lbb.3 for ; Wed, 13 Jan 2016 10:21:14 -0800 (PST) X-Gm-Message-State: ALoCoQmKovNSdnT2EWAPom0DRK2TbG5vTSuuroZcbW2x8bfXt4Vb26zEp4sQM+mE8OgADw8O+be8o0g9h8ihVxIsmzUyEzKAsQ== X-Received: by 10.112.161.33 with SMTP id xp1mr51447663lbb.141.1452709272669; Wed, 13 Jan 2016 10:21:12 -0800 (PST) MIME-Version: 1.0 Received: by 10.112.235.1 with HTTP; Wed, 13 Jan 2016 10:20:53 -0800 (PST) From: Arnaud Sahuguet Date: Wed, 13 Jan 2016 13:20:53 -0500 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org X-Mailman-Approved-At: Thu, 14 Jan 2016 12:17:39 +0000 Subject: [MirageOS-devel] What crypto libraries are available on/for the platform? X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6699052050879128355==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============6699052050879128355== Content-Type: multipart/alternative; boundary=001a11c3487428da0a05293b3c8b --001a11c3487428da0a05293b3c8b Content-Type: text/plain; charset=UTF-8 Hi, what are the crypto libraries available for MirageOS? I am interested in: - elliptic curves - bilinear pairing-friendly elliptic curves - and the usual stuff, HMAC, SHA-xxxx regards, Arnaud --001a11c3487428da0a05293b3c8b Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi,

what are the crypto libraries avail= able for MirageOS?
I am interested in:
-=C2=A0ellip= tic curves
- bilinear pairing-friendly elliptic curves=
- and the usual stuff, HMAC, SHA-xxxx

regards,

Arnaud
--001a11c3487428da0a05293b3c8b-- --===============6699052050879128355== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============6699052050879128355==-- From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 13:40:11 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 13:40:11 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJi86-0007bS-5b; Thu, 14 Jan 2016 13:39:58 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJi83-0007bN-Tb for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 13:39:56 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id A4/0A-08977-B25A7965; Thu, 14 Jan 2016 13:39:55 +0000 X-Env-Sender: hannes@mehnert.org X-Msg-Ref: server-6.tower-21.messagelabs.com!1452778792!10091139!1 X-Originating-IP: [213.73.89.200] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 49006 invoked from network); 14 Jan 2016 13:39:54 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-6.tower-21.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Jan 2016 13:39:54 -0000 Received: from [128.232.110.198] (c198.al.cl.cam.ac.uk [128.232.110.198]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 64DB11B57 for ; Thu, 14 Jan 2016 14:39:51 +0100 (CET) To: mirageos-devel@lists.xenproject.org References: From: Hannes Mehnert Openpgp: id=11B5464249B5BD858FFF6328BC896588DF7C28EE Message-ID: <5697A515.9090305@mehnert.org> Date: Thu, 14 Jan 2016 13:39:33 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] What crypto libraries are available on/for the platform? X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6979170082264501137==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============6979170082264501137== Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="wM8jFrLH7Vgkoj3XEc1FaawKppV0vpPS9" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --wM8jFrLH7Vgkoj3XEc1FaawKppV0vpPS9 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Arnaud, On 01/13/2016 18:20, Arnaud Sahuguet wrote: > what are the crypto libraries available for MirageOS? David wrote nocrypto (https://github.com/mirleft/ocaml-nocrypto) which works fine on MirageOS. No ECC yet, though. hannes --wM8jFrLH7Vgkoj3XEc1FaawKppV0vpPS9 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCQAGBQJWl6UVAAoJELyJZYjffCjuDXsP/1obrUDXVIfiPnzvYCPqnMcI 301XR2Od29zngJJoT6FF9+9pb36WkHkwBvisNtqmmBBsdSvQ+YFN4aPW+QPytgya ulSuE70A+YFeJfu6PoSDziOuEvfgLd5wZICqvmnklcHWmBaJ3a54ORiusiQBZMiV 56H0K7beWRSPkBCKOByI2jUyI+sZuebT5YGjZnh9rrOe1Uooy15lTViph59RQAKi UTyFDv1Y7anhr0XLS0Y+e3rHTvxdo42LvznbZ5/uU9O0oiFFZXeDWzF38saXUftr NasnjrwU1r70uNMaSJwV5e9w5eFjUrrpbulSz/HJfdxzL+PYDh8Dvkty4vPz0sqp B/9YrqLc3AMzD5XhUCyzSgtSgc6DWpp2hoHa4Ru6yvSYJorT2zLIBRUlVd8gAYw3 ZrNjrGaMgcBzN/5iBx4hGYt0Ob+jHYOBsRo49fJQWooRrVWDNd4wZ9YaQSaJxPJQ Z25keYE9pmVDxPo0vea0kHg3qb5DKEQ/Rtwu6N5hb12Hml2B4fzKme3RT/5Akvrz rVHtKVmU99fLzY/D/jcbJnbCsCGtqvTp8Wary9TegasTkQDOQtgS0dajXAnir3MY abWikALbGWmgBfP4cjqS0ipIqoF1IBrJtVYFej1kp/PM8m8Ho2fCaDzNSXHUcY6e 6VYKEdzRADmF5cgoWMik =vfsJ -----END PGP SIGNATURE----- --wM8jFrLH7Vgkoj3XEc1FaawKppV0vpPS9-- --===============6979170082264501137== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============6979170082264501137==-- From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 13:40:11 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 13:40:11 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJi86-0007bS-5b; Thu, 14 Jan 2016 13:39:58 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJi83-0007bN-Tb for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 13:39:56 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id A4/0A-08977-B25A7965; Thu, 14 Jan 2016 13:39:55 +0000 X-Env-Sender: hannes@mehnert.org X-Msg-Ref: server-6.tower-21.messagelabs.com!1452778792!10091139!1 X-Originating-IP: [213.73.89.200] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 49006 invoked from network); 14 Jan 2016 13:39:54 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-6.tower-21.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Jan 2016 13:39:54 -0000 Received: from [128.232.110.198] (c198.al.cl.cam.ac.uk [128.232.110.198]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 64DB11B57 for ; Thu, 14 Jan 2016 14:39:51 +0100 (CET) To: mirageos-devel@lists.xenproject.org References: From: Hannes Mehnert Openpgp: id=11B5464249B5BD858FFF6328BC896588DF7C28EE Message-ID: <5697A515.9090305@mehnert.org> Date: Thu, 14 Jan 2016 13:39:33 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] What crypto libraries are available on/for the platform? X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6979170082264501137==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============6979170082264501137== Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="wM8jFrLH7Vgkoj3XEc1FaawKppV0vpPS9" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --wM8jFrLH7Vgkoj3XEc1FaawKppV0vpPS9 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Arnaud, On 01/13/2016 18:20, Arnaud Sahuguet wrote: > what are the crypto libraries available for MirageOS? David wrote nocrypto (https://github.com/mirleft/ocaml-nocrypto) which works fine on MirageOS. No ECC yet, though. hannes --wM8jFrLH7Vgkoj3XEc1FaawKppV0vpPS9 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCQAGBQJWl6UVAAoJELyJZYjffCjuDXsP/1obrUDXVIfiPnzvYCPqnMcI 301XR2Od29zngJJoT6FF9+9pb36WkHkwBvisNtqmmBBsdSvQ+YFN4aPW+QPytgya ulSuE70A+YFeJfu6PoSDziOuEvfgLd5wZICqvmnklcHWmBaJ3a54ORiusiQBZMiV 56H0K7beWRSPkBCKOByI2jUyI+sZuebT5YGjZnh9rrOe1Uooy15lTViph59RQAKi UTyFDv1Y7anhr0XLS0Y+e3rHTvxdo42LvznbZ5/uU9O0oiFFZXeDWzF38saXUftr NasnjrwU1r70uNMaSJwV5e9w5eFjUrrpbulSz/HJfdxzL+PYDh8Dvkty4vPz0sqp B/9YrqLc3AMzD5XhUCyzSgtSgc6DWpp2hoHa4Ru6yvSYJorT2zLIBRUlVd8gAYw3 ZrNjrGaMgcBzN/5iBx4hGYt0Ob+jHYOBsRo49fJQWooRrVWDNd4wZ9YaQSaJxPJQ Z25keYE9pmVDxPo0vea0kHg3qb5DKEQ/Rtwu6N5hb12Hml2B4fzKme3RT/5Akvrz rVHtKVmU99fLzY/D/jcbJnbCsCGtqvTp8Wary9TegasTkQDOQtgS0dajXAnir3MY abWikALbGWmgBfP4cjqS0ipIqoF1IBrJtVYFej1kp/PM8m8Ho2fCaDzNSXHUcY6e 6VYKEdzRADmF5cgoWMik =vfsJ -----END PGP SIGNATURE----- --wM8jFrLH7Vgkoj3XEc1FaawKppV0vpPS9-- --===============6979170082264501137== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============6979170082264501137==-- From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 13:46:25 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 13:46:25 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJiEL-0007o2-Eh; Thu, 14 Jan 2016 13:46:25 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJiEK-0007nu-91 for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 13:46:24 +0000 Received: from [85.158.139.211] by server-17.bemta-5.messagelabs.com id 40/0D-21901-FA6A7965; Thu, 14 Jan 2016 13:46:23 +0000 X-Env-Sender: kosmo.zb@gmail.com X-Msg-Ref: server-10.tower-206.messagelabs.com!1452779182!15843543!1 X-Originating-IP: [209.85.220.182] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 25239 invoked from network); 14 Jan 2016 13:46:23 -0000 Received: from mail-qk0-f182.google.com (HELO mail-qk0-f182.google.com) (209.85.220.182) by server-10.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 14 Jan 2016 13:46:23 -0000 Received: by mail-qk0-f182.google.com with SMTP id x1so18884977qkc.1 for ; Thu, 14 Jan 2016 05:46:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=6lxIyPvowSKyfpTVjrsX919FloMWwz4kUaWU4KT3SHw=; b=UQLD2TdUTFoviNruPs5P4cwGubCr1QuI4yypO6x4F/qYLJhbXxCLjkYIqEJWtaVSdG 4dwIvKAahetqG0LsewMj87gioJlHDhJbeDq4zR9HEpVP0dqC+swyFDlxFyCdwK3dAuvZ kn31hmXiCIagmVz2tcPUsz74wx+fT7dQlvg6RKuyRfBhkTW6uyir9Q9WUZkGVrhqVOnD IyQocYygNv8/kN9BiLohsojOY1HAkq0WeQoUltwq+wbq1JZRUeaVoPPXXj4tp8PLCffX pnHG5zpl4mA+PHqwXYQ1/DjCQaFltshn1F5Jh/ttu7zK2hYrS8ZTEIiV9K5VHRq3UEX6 B7CQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=6lxIyPvowSKyfpTVjrsX919FloMWwz4kUaWU4KT3SHw=; b=P1usTjukw+Y373UTEQURPHoBZfT/dStbNN3c4+FUa+P9Q2A0hVrbvQYsYUzvho1zcV 7tBlmNf+aGwKnBTSkzPUc3NLCqJwM6661w1v0r+40c4tlk8H8+Bbl2Ql8UYqgD3S852Z /jr67pApXp6rCSAwfbyp974C8ruAo3uIR59YBMpfp1K84ACJbDaoGJ9+FCRuCeccX93x D5E60dVksgT5DzycP99xOk5aNYvxIG2QW6JAMsfq7i2jlX0B4UM7QuMhdz10/imgEaby hMi3Wm1XlvrVL8veIGDejEULIheIgzz3IOukztKRyIfmVRbnkikadJEEZzcGFMB//xAj MZhg== X-Gm-Message-State: ALoCoQkc2q0FioUEZRbHT54uz/LRXCfB9b5+kDco2C6gK0z8PBTjnsfSaEWI6HHi6In1MP+Nl6nHDrbVKAS2WMJhrU7fYvr/ng== MIME-Version: 1.0 X-Received: by 10.129.80.7 with SMTP id e7mr2904108ywb.329.1452779182159; Thu, 14 Jan 2016 05:46:22 -0800 (PST) Received: by 10.13.221.212 with HTTP; Thu, 14 Jan 2016 05:46:21 -0800 (PST) In-Reply-To: References: Date: Thu, 14 Jan 2016 13:46:21 +0000 X-Google-Sender-Auth: zPjis8ScboC19X2YrVK2fyu7bWc Message-ID: From: David Sheets To: Arnaud Sahuguet Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] What crypto libraries are available on/for the platform? X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Wed, Jan 13, 2016 at 6:20 PM, Arnaud Sahuguet wrote: > Hi, > > what are the crypto libraries available for MirageOS? Bindings to libsodium also exist but no attempt has been made to port them to work on Mirage as far as I know. There is nothing inherently unportable in the bindings or libsodium itself but it's not Ready To Go. David > I am interested in: > - elliptic curves > - bilinear pairing-friendly elliptic curves > - and the usual stuff, HMAC, SHA-xxxx > > regards, > > Arnaud > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 13:46:25 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 13:46:25 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJiEL-0007o2-Eh; Thu, 14 Jan 2016 13:46:25 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJiEK-0007nu-91 for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 13:46:24 +0000 Received: from [85.158.139.211] by server-17.bemta-5.messagelabs.com id 40/0D-21901-FA6A7965; Thu, 14 Jan 2016 13:46:23 +0000 X-Env-Sender: kosmo.zb@gmail.com X-Msg-Ref: server-10.tower-206.messagelabs.com!1452779182!15843543!1 X-Originating-IP: [209.85.220.182] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 25239 invoked from network); 14 Jan 2016 13:46:23 -0000 Received: from mail-qk0-f182.google.com (HELO mail-qk0-f182.google.com) (209.85.220.182) by server-10.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 14 Jan 2016 13:46:23 -0000 Received: by mail-qk0-f182.google.com with SMTP id x1so18884977qkc.1 for ; Thu, 14 Jan 2016 05:46:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=6lxIyPvowSKyfpTVjrsX919FloMWwz4kUaWU4KT3SHw=; b=UQLD2TdUTFoviNruPs5P4cwGubCr1QuI4yypO6x4F/qYLJhbXxCLjkYIqEJWtaVSdG 4dwIvKAahetqG0LsewMj87gioJlHDhJbeDq4zR9HEpVP0dqC+swyFDlxFyCdwK3dAuvZ kn31hmXiCIagmVz2tcPUsz74wx+fT7dQlvg6RKuyRfBhkTW6uyir9Q9WUZkGVrhqVOnD IyQocYygNv8/kN9BiLohsojOY1HAkq0WeQoUltwq+wbq1JZRUeaVoPPXXj4tp8PLCffX pnHG5zpl4mA+PHqwXYQ1/DjCQaFltshn1F5Jh/ttu7zK2hYrS8ZTEIiV9K5VHRq3UEX6 B7CQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=6lxIyPvowSKyfpTVjrsX919FloMWwz4kUaWU4KT3SHw=; b=P1usTjukw+Y373UTEQURPHoBZfT/dStbNN3c4+FUa+P9Q2A0hVrbvQYsYUzvho1zcV 7tBlmNf+aGwKnBTSkzPUc3NLCqJwM6661w1v0r+40c4tlk8H8+Bbl2Ql8UYqgD3S852Z /jr67pApXp6rCSAwfbyp974C8ruAo3uIR59YBMpfp1K84ACJbDaoGJ9+FCRuCeccX93x D5E60dVksgT5DzycP99xOk5aNYvxIG2QW6JAMsfq7i2jlX0B4UM7QuMhdz10/imgEaby hMi3Wm1XlvrVL8veIGDejEULIheIgzz3IOukztKRyIfmVRbnkikadJEEZzcGFMB//xAj MZhg== X-Gm-Message-State: ALoCoQkc2q0FioUEZRbHT54uz/LRXCfB9b5+kDco2C6gK0z8PBTjnsfSaEWI6HHi6In1MP+Nl6nHDrbVKAS2WMJhrU7fYvr/ng== MIME-Version: 1.0 X-Received: by 10.129.80.7 with SMTP id e7mr2904108ywb.329.1452779182159; Thu, 14 Jan 2016 05:46:22 -0800 (PST) Received: by 10.13.221.212 with HTTP; Thu, 14 Jan 2016 05:46:21 -0800 (PST) In-Reply-To: References: Date: Thu, 14 Jan 2016 13:46:21 +0000 X-Google-Sender-Auth: zPjis8ScboC19X2YrVK2fyu7bWc Message-ID: From: David Sheets To: Arnaud Sahuguet Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] What crypto libraries are available on/for the platform? X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Wed, Jan 13, 2016 at 6:20 PM, Arnaud Sahuguet wrote: > Hi, > > what are the crypto libraries available for MirageOS? Bindings to libsodium also exist but no attempt has been made to port them to work on Mirage as far as I know. There is nothing inherently unportable in the bindings or libsodium itself but it's not Ready To Go. David > I am interested in: > - elliptic curves > - bilinear pairing-friendly elliptic curves > - and the usual stuff, HMAC, SHA-xxxx > > regards, > > Arnaud > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 14:41:50 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 14:41:50 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJj5p-0001ai-7a; Thu, 14 Jan 2016 14:41:41 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJj5o-0001ac-Iu for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 14:41:40 +0000 Received: from [85.158.143.35] by server-1.bemta-4.messagelabs.com id 8A/71-09708-4A3B7965; Thu, 14 Jan 2016 14:41:40 +0000 X-Env-Sender: hannes@mehnert.org X-Msg-Ref: server-13.tower-21.messagelabs.com!1452782497!8487967!1 X-Originating-IP: [213.73.89.200] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 62781 invoked from network); 14 Jan 2016 14:41:38 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-13.tower-21.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Jan 2016 14:41:38 -0000 Received: from [128.232.110.198] (c198.al.cl.cam.ac.uk [128.232.110.198]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id BE04F18FE for ; Thu, 14 Jan 2016 15:41:35 +0100 (CET) To: mirageos-devel@lists.xenproject.org References: From: Hannes Mehnert Openpgp: id=11B5464249B5BD858FFF6328BC896588DF7C28EE Message-ID: <5697B393.4060706@mehnert.org> Date: Thu, 14 Jan 2016 14:41:23 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi Tim, On 01/08/2016 11:19, Tim Cuthbertson wrote: > I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. > There is sadly no `safepass-xen` package, and trying to just use > `safepass` results in link errors: I wonder whether it'd be more than a day of work to implement bcrypt directly in OCaml. Would for sure safe from linking trouble (and be automatically memory safe). An initial version might be 50% or 90% of the speed of the pure C variant, but does this really matter for bcrypt? hannes _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 14:41:50 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 14:41:50 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJj5p-0001ai-7a; Thu, 14 Jan 2016 14:41:41 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJj5o-0001ac-Iu for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 14:41:40 +0000 Received: from [85.158.143.35] by server-1.bemta-4.messagelabs.com id 8A/71-09708-4A3B7965; Thu, 14 Jan 2016 14:41:40 +0000 X-Env-Sender: hannes@mehnert.org X-Msg-Ref: server-13.tower-21.messagelabs.com!1452782497!8487967!1 X-Originating-IP: [213.73.89.200] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 62781 invoked from network); 14 Jan 2016 14:41:38 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-13.tower-21.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Jan 2016 14:41:38 -0000 Received: from [128.232.110.198] (c198.al.cl.cam.ac.uk [128.232.110.198]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id BE04F18FE for ; Thu, 14 Jan 2016 15:41:35 +0100 (CET) To: mirageos-devel@lists.xenproject.org References: From: Hannes Mehnert Openpgp: id=11B5464249B5BD858FFF6328BC896588DF7C28EE Message-ID: <5697B393.4060706@mehnert.org> Date: Thu, 14 Jan 2016 14:41:23 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi Tim, On 01/08/2016 11:19, Tim Cuthbertson wrote: > I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. > There is sadly no `safepass-xen` package, and trying to just use > `safepass` results in link errors: I wonder whether it'd be more than a day of work to implement bcrypt directly in OCaml. Would for sure safe from linking trouble (and be automatically memory safe). An initial version might be 50% or 90% of the speed of the pure C variant, but does this really matter for bcrypt? hannes _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 15:23:43 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 15:23:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJjkS-0005oK-L6; Thu, 14 Jan 2016 15:23:40 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJjkR-0005oF-C9 for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 15:23:39 +0000 Received: from [85.158.143.35] by server-3.bemta-4.messagelabs.com id DB/5C-31122-A7DB7965; Thu, 14 Jan 2016 15:23:38 +0000 X-Env-Sender: arnaud.sahuguet@cornell.edu X-Msg-Ref: server-15.tower-21.messagelabs.com!1452785014!10104193!1 X-Originating-IP: [128.84.13.242] X-SpamReason: No, hits=0.4 required=7.0 tests=HTML_30_40,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 10508 invoked from network); 14 Jan 2016 15:23:37 -0000 Received: from limerock02.mail.cornell.edu (HELO limerock02.mail.cornell.edu) (128.84.13.242) by server-15.tower-21.messagelabs.com with SMTP; 14 Jan 2016 15:23:37 -0000 X-CornellRouted: This message has been Routed already. Received: from authusersmtp.mail.cornell.edu (granite3.serverfarm.cornell.edu [10.16.197.8]) by limerock02.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id u0EFNYEY026706 for ; Thu, 14 Jan 2016 10:23:34 -0500 Received: from mail-qk0-f175.google.com (mail-qk0-f175.google.com [209.85.220.175]) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id u0EFNXUW019849 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Thu, 14 Jan 2016 10:23:34 -0500 Received: by mail-qk0-f175.google.com with SMTP id p186so224836174qke.0 for ; Thu, 14 Jan 2016 07:23:33 -0800 (PST) X-Gm-Message-State: ALoCoQkryoyUsc8XxH2ojGuA4fMIukBR8h3T5DhWD7gX+4PGKi8Q1QVVWWvPy3Dp2teJe/TSdptezL5r6GLMvCpkqhFdDgDnqg== X-Received: by 10.112.143.227 with SMTP id sh3mr1295726lbb.55.1452785013146; Thu, 14 Jan 2016 07:23:33 -0800 (PST) MIME-Version: 1.0 Received: by 10.112.235.1 with HTTP; Thu, 14 Jan 2016 07:23:13 -0800 (PST) In-Reply-To: <5697B393.4060706@mehnert.org> References: <5697B393.4060706@mehnert.org> From: Arnaud Sahuguet Date: Thu, 14 Jan 2016 10:23:13 -0500 X-Gmail-Original-Message-ID: Message-ID: To: Hannes Mehnert Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============2859821775666364016==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============2859821775666364016== Content-Type: multipart/alternative; boundary=089e01160cd6a4ce4105294cde23 --089e01160cd6a4ce4105294cde23 Content-Type: text/plain; charset=UTF-8 Naive question: for low-level primitives like crypto that require speed, when do you/we prefer native implementation (in C at the libOS level) vs oCaml implementation? regards, Arnaud On Thu, Jan 14, 2016 at 9:41 AM, Hannes Mehnert wrote: > Hi Tim, > > On 01/08/2016 11:19, Tim Cuthbertson wrote: > > I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. > > There is sadly no `safepass-xen` package, and trying to just use > > `safepass` results in link errors: > > I wonder whether it'd be more than a day of work to implement bcrypt > directly in OCaml. Would for sure safe from linking trouble (and be > automatically memory safe). An initial version might be 50% or 90% of > the speed of the pure C variant, but does this really matter for bcrypt? > > > hannes > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > --089e01160cd6a4ce4105294cde23 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Naive question: for low-level primitives like crypto that = require speed, when do you/we prefer native implementation (in C at the lib= OS level) vs oCaml implementation?

regards,
Arnaud

On Thu, Jan 14, 2016 at 9:41 AM, Hannes Mehner= t <hannes@mehnert.org> wrote:
Hi Tim,

On 01/08/2016 11:19, Tim Cuthbertson wrote:
> I'd like to use `Bcrypt` from the `safepass` opam module in passe[= 0].
> There is sadly no `safepass-xen` package, and trying to just use
> `safepass` results in link errors:

I wonder whether it'd be more than a day of work to implement bcrypt directly in OCaml.=C2=A0 Would for sure safe from linking trouble (and be automatically memory safe).=C2=A0 An initial version might be 50% or 90% of=
the speed of the pure C variant, but does this really matter for bcrypt?

hannes

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
http://lists.xenproject.org/cgi-b= in/mailman/listinfo/mirageos-devel

--089e01160cd6a4ce4105294cde23-- --===============2859821775666364016== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============2859821775666364016==-- From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 15:23:43 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 15:23:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJjkS-0005oK-L6; Thu, 14 Jan 2016 15:23:40 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJjkR-0005oF-C9 for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 15:23:39 +0000 Received: from [85.158.143.35] by server-3.bemta-4.messagelabs.com id DB/5C-31122-A7DB7965; Thu, 14 Jan 2016 15:23:38 +0000 X-Env-Sender: arnaud.sahuguet@cornell.edu X-Msg-Ref: server-15.tower-21.messagelabs.com!1452785014!10104193!1 X-Originating-IP: [128.84.13.242] X-SpamReason: No, hits=0.4 required=7.0 tests=HTML_30_40,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 10508 invoked from network); 14 Jan 2016 15:23:37 -0000 Received: from limerock02.mail.cornell.edu (HELO limerock02.mail.cornell.edu) (128.84.13.242) by server-15.tower-21.messagelabs.com with SMTP; 14 Jan 2016 15:23:37 -0000 X-CornellRouted: This message has been Routed already. Received: from authusersmtp.mail.cornell.edu (granite3.serverfarm.cornell.edu [10.16.197.8]) by limerock02.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id u0EFNYEY026706 for ; Thu, 14 Jan 2016 10:23:34 -0500 Received: from mail-qk0-f175.google.com (mail-qk0-f175.google.com [209.85.220.175]) (authenticated bits=0) by authusersmtp.mail.cornell.edu (8.14.4/8.12.10) with ESMTP id u0EFNXUW019849 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Thu, 14 Jan 2016 10:23:34 -0500 Received: by mail-qk0-f175.google.com with SMTP id p186so224836174qke.0 for ; Thu, 14 Jan 2016 07:23:33 -0800 (PST) X-Gm-Message-State: ALoCoQkryoyUsc8XxH2ojGuA4fMIukBR8h3T5DhWD7gX+4PGKi8Q1QVVWWvPy3Dp2teJe/TSdptezL5r6GLMvCpkqhFdDgDnqg== X-Received: by 10.112.143.227 with SMTP id sh3mr1295726lbb.55.1452785013146; Thu, 14 Jan 2016 07:23:33 -0800 (PST) MIME-Version: 1.0 Received: by 10.112.235.1 with HTTP; Thu, 14 Jan 2016 07:23:13 -0800 (PST) In-Reply-To: <5697B393.4060706@mehnert.org> References: <5697B393.4060706@mehnert.org> From: Arnaud Sahuguet Date: Thu, 14 Jan 2016 10:23:13 -0500 X-Gmail-Original-Message-ID: Message-ID: To: Hannes Mehnert Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============2859821775666364016==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============2859821775666364016== Content-Type: multipart/alternative; boundary=089e01160cd6a4ce4105294cde23 --089e01160cd6a4ce4105294cde23 Content-Type: text/plain; charset=UTF-8 Naive question: for low-level primitives like crypto that require speed, when do you/we prefer native implementation (in C at the libOS level) vs oCaml implementation? regards, Arnaud On Thu, Jan 14, 2016 at 9:41 AM, Hannes Mehnert wrote: > Hi Tim, > > On 01/08/2016 11:19, Tim Cuthbertson wrote: > > I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. > > There is sadly no `safepass-xen` package, and trying to just use > > `safepass` results in link errors: > > I wonder whether it'd be more than a day of work to implement bcrypt > directly in OCaml. Would for sure safe from linking trouble (and be > automatically memory safe). An initial version might be 50% or 90% of > the speed of the pure C variant, but does this really matter for bcrypt? > > > hannes > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > --089e01160cd6a4ce4105294cde23 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Naive question: for low-level primitives like crypto that = require speed, when do you/we prefer native implementation (in C at the lib= OS level) vs oCaml implementation?

regards,
Arnaud

On Thu, Jan 14, 2016 at 9:41 AM, Hannes Mehner= t <hannes@mehnert.org> wrote:
Hi Tim,

On 01/08/2016 11:19, Tim Cuthbertson wrote:
> I'd like to use `Bcrypt` from the `safepass` opam module in passe[= 0].
> There is sadly no `safepass-xen` package, and trying to just use
> `safepass` results in link errors:

I wonder whether it'd be more than a day of work to implement bcrypt directly in OCaml.=C2=A0 Would for sure safe from linking trouble (and be automatically memory safe).=C2=A0 An initial version might be 50% or 90% of=
the speed of the pure C variant, but does this really matter for bcrypt?

hannes

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--089e01160cd6a4ce4105294cde23-- --===============2859821775666364016== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============2859821775666364016==-- From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 16:35:43 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 16:35:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJks4-0001LO-I7; Thu, 14 Jan 2016 16:35:36 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJks2-0001L6-VR for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 16:35:35 +0000 Received: from [193.109.254.147] by server-3.bemta-14.messagelabs.com id 7E/27-25435-65EC7965; Thu, 14 Jan 2016 16:35:34 +0000 X-Env-Sender: hannes@mehnert.org X-Msg-Ref: server-2.tower-27.messagelabs.com!1452789333!14929390!1 X-Originating-IP: [213.73.89.200] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 61537 invoked from network); 14 Jan 2016 16:35:33 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-2.tower-27.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Jan 2016 16:35:33 -0000 Received: from [128.232.110.198] (c198.al.cl.cam.ac.uk [128.232.110.198]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 457481120 for ; Thu, 14 Jan 2016 17:35:32 +0100 (CET) References: <5697B393.4060706@mehnert.org> To: mirageos-devel@lists.xenproject.org From: Hannes Mehnert Openpgp: id=11B5464249B5BD858FFF6328BC896588DF7C28EE X-Enigmail-Draft-Status: N1110 Message-ID: <5697CE47.2010406@mehnert.org> Date: Thu, 14 Jan 2016 16:35:19 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 01/14/2016 15:23, Arnaud Sahuguet wrote: > Naive question: for low-level primitives like crypto that require speed, > when do you/we prefer native implementation (in C at the libOS level) vs > OCaml implementation? I prefer nearly always OCaml code. In our nqsb-tls paper (https://nqsb.io/nqsbtls-usenix-security15.pdf) there's in Section 4.2 a brief description of nocrypto. It uses allocation-free (and (data-dependent) loop free) C code for the AES and SHA1/SHA2 cores. The C code gets a source and destination byte vector, as well as a key, and does only the bit twiddling. The cipher modes (CBC/CTR/GCM/CCM) are implemented in OCaml. hannes _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 14 16:35:43 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 14 Jan 2016 16:35:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJks4-0001LO-I7; Thu, 14 Jan 2016 16:35:36 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aJks2-0001L6-VR for mirageos-devel@lists.xenproject.org; Thu, 14 Jan 2016 16:35:35 +0000 Received: from [193.109.254.147] by server-3.bemta-14.messagelabs.com id 7E/27-25435-65EC7965; Thu, 14 Jan 2016 16:35:34 +0000 X-Env-Sender: hannes@mehnert.org X-Msg-Ref: server-2.tower-27.messagelabs.com!1452789333!14929390!1 X-Originating-IP: [213.73.89.200] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 61537 invoked from network); 14 Jan 2016 16:35:33 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-2.tower-27.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Jan 2016 16:35:33 -0000 Received: from [128.232.110.198] (c198.al.cl.cam.ac.uk [128.232.110.198]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 457481120 for ; Thu, 14 Jan 2016 17:35:32 +0100 (CET) References: <5697B393.4060706@mehnert.org> To: mirageos-devel@lists.xenproject.org From: Hannes Mehnert Openpgp: id=11B5464249B5BD858FFF6328BC896588DF7C28EE X-Enigmail-Draft-Status: N1110 Message-ID: <5697CE47.2010406@mehnert.org> Date: Thu, 14 Jan 2016 16:35:19 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 01/14/2016 15:23, Arnaud Sahuguet wrote: > Naive question: for low-level primitives like crypto that require speed, > when do you/we prefer native implementation (in C at the libOS level) vs > OCaml implementation? I prefer nearly always OCaml code. In our nqsb-tls paper (https://nqsb.io/nqsbtls-usenix-security15.pdf) there's in Section 4.2 a brief description of nocrypto. It uses allocation-free (and (data-dependent) loop free) C code for the AES and SHA1/SHA2 cores. The C code gets a source and destination byte vector, as well as a key, and does only the bit twiddling. The cipher modes (CBC/CTR/GCM/CCM) are implemented in OCaml. hannes _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 15 08:59:14 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 15 Jan 2016 08:59:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK0Dn-0000Z9-9y; Fri, 15 Jan 2016 08:59:03 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK0Dm-0000Z4-2v for MirageOS-devel@lists.xenproject.org; Fri, 15 Jan 2016 08:59:02 +0000 Received: from [85.158.139.211] by server-4.bemta-5.messagelabs.com id A4/55-24856-5D4B8965; Fri, 15 Jan 2016 08:59:01 +0000 X-Env-Sender: stefanxe@gmx.net X-Msg-Ref: server-14.tower-206.messagelabs.com!1452848340!15714921!1 X-Originating-IP: [212.227.17.21] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE3LjIxID0+IDI1Mjg0\n,sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE3LjIxID0+IDI1Mjg0\n X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 47875 invoked from network); 15 Jan 2016 08:59:00 -0000 Received: from mout.gmx.net (HELO mout.gmx.net) (212.227.17.21) by server-14.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 15 Jan 2016 08:59:00 -0000 Received: from [192.168.4.56] ([80.153.118.62]) by mail.gmx.com (mrgmx102) with ESMTPSA (Nemesis) id 0Las1k-1ZrEzM0U0m-00kOmd for ; Fri, 15 Jan 2016 09:59:00 +0100 To: MirageOS-devel@lists.xenproject.org From: Stefan Xenon Message-ID: <5698B4D2.9080409@gmx.net> Date: Fri, 15 Jan 2016 09:58:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 X-Provags-ID: V03:K0:3PjO6E0XlLu8RWPYaorA5IkpTjesscHrXbvoiX0Lv9xqxN60fWV oBZ5WXtyRohRPANtpo9AJrTQ9cNtQttJStu56ypE+/HrJd70L50krMCcizZgXu8TRjEAUmb Lg0GxOoPTKpbr3e9kjdKnz0w4fgY3BvzsWHkNgz5u0ioZQ8YAWNQTId2BSMtzh0JirM6HoX kAysIk09aeOx3GrcILKMw== X-UI-Out-Filterresults: notjunk:1;V01:K0:fDNUTlIdNqE=:zu9YntYYcdfk7FwTbfstvw De2xjvB7G/939rvImuHYv3wCbFCmRW1/I72UYJbbbODunXBEm0B6D/VatqcWF+RkLSDwjLr8P HGHJJnHbzPPG7bC3JeFu8Ss2UE6JemCkHyVlzODvpFghsJBN7TMpdW44uW3pXrSCgksKFXhzO JDI7nEcO5pes45Bp0ciPGxS0ZeScRZMCOGkDRt0H/wqIcqlNl7o87gKNaUwMkNJuzPCI0ho+4 +rvmJndsv79kyKkxzpHoTfEZfoyMUIxLlbgKlcCPpzH6LQnAvi8u43hUCu19i1iZPjUFytnkB V4qFoJ0gtZQAtyiUIZCahFKgXfTcC1KGwmYQX92h0Fyl+wYGCapyaYLlfiIsWQCIpHyyB6NBl EwPEN2ALZhZkhF88k6CJJodDfrfmRn2tLAjAUsQWWntNI0F3pWqUvi2w6JjvMUuORJ5ZjCu3b O8m/hHu3O5GOOj+myBFRA1tQumg9Ph3H/6FMuaRaDQz7ZMblOryKEr89gpbKaMN5LR+hvQesA rneGfe0xt3ZEPb6ccdC1wrM+byX74ievg4M5OeYfsJBnbAueIpKYyIDMzh0SswIkhfkeEeasE 9L+ALB6KAQRTkveTRaS2uYZAwUSbSQ/TS5qxsrIQ24oTybKL0FHXODTgLJB1FVCRukz5wci3s xUfAGLffQIj3GgHLCpX2gMt1RH/JqysUfOy7WW+Dm+V6R278FWZgTDESQC8q3j6m/Kzviyzy1 Lwm4OBIP4Ac9Wsi37B7fUi0KHt2kx+2W6n4NT2KB5NiUbmXrjrszVEMA6hsyrV7dIFpa5WySi mQod/Ec Subject: [MirageOS-devel] utilizing multicore systems X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi! I would like to understand better how Mirage is used on multi-core systems. I understand that usually one unikernel can be started on each core. The unikernels would be totally independent and vchan can be used for connecting those unikernels. If all unikernel instances are of the same type (e.g. serving a website), is there any mechanism to support clustering or load sharing among them or would this have to be implemented manually by deploying a separate load balancer for instance? I'm considering buying ODROID-XU4 which provides several Cortex-A15 and Cortex-A7 cores. In that case, how can I define on which core a specific unikernel will be started? Thanks for your help. Stefan _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 15 08:59:14 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 15 Jan 2016 08:59:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK0Dn-0000Z9-9y; Fri, 15 Jan 2016 08:59:03 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK0Dm-0000Z4-2v for MirageOS-devel@lists.xenproject.org; Fri, 15 Jan 2016 08:59:02 +0000 Received: from [85.158.139.211] by server-4.bemta-5.messagelabs.com id A4/55-24856-5D4B8965; Fri, 15 Jan 2016 08:59:01 +0000 X-Env-Sender: stefanxe@gmx.net X-Msg-Ref: server-14.tower-206.messagelabs.com!1452848340!15714921!1 X-Originating-IP: [212.227.17.21] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE3LjIxID0+IDI1Mjg0\n,sa_preprocessor: QmFkIElQOiAyMTIuMjI3LjE3LjIxID0+IDI1Mjg0\n X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 47875 invoked from network); 15 Jan 2016 08:59:00 -0000 Received: from mout.gmx.net (HELO mout.gmx.net) (212.227.17.21) by server-14.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 15 Jan 2016 08:59:00 -0000 Received: from [192.168.4.56] ([80.153.118.62]) by mail.gmx.com (mrgmx102) with ESMTPSA (Nemesis) id 0Las1k-1ZrEzM0U0m-00kOmd for ; Fri, 15 Jan 2016 09:59:00 +0100 To: MirageOS-devel@lists.xenproject.org From: Stefan Xenon Message-ID: <5698B4D2.9080409@gmx.net> Date: Fri, 15 Jan 2016 09:58:58 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 X-Provags-ID: V03:K0:3PjO6E0XlLu8RWPYaorA5IkpTjesscHrXbvoiX0Lv9xqxN60fWV oBZ5WXtyRohRPANtpo9AJrTQ9cNtQttJStu56ypE+/HrJd70L50krMCcizZgXu8TRjEAUmb Lg0GxOoPTKpbr3e9kjdKnz0w4fgY3BvzsWHkNgz5u0ioZQ8YAWNQTId2BSMtzh0JirM6HoX kAysIk09aeOx3GrcILKMw== X-UI-Out-Filterresults: notjunk:1;V01:K0:fDNUTlIdNqE=:zu9YntYYcdfk7FwTbfstvw De2xjvB7G/939rvImuHYv3wCbFCmRW1/I72UYJbbbODunXBEm0B6D/VatqcWF+RkLSDwjLr8P HGHJJnHbzPPG7bC3JeFu8Ss2UE6JemCkHyVlzODvpFghsJBN7TMpdW44uW3pXrSCgksKFXhzO JDI7nEcO5pes45Bp0ciPGxS0ZeScRZMCOGkDRt0H/wqIcqlNl7o87gKNaUwMkNJuzPCI0ho+4 +rvmJndsv79kyKkxzpHoTfEZfoyMUIxLlbgKlcCPpzH6LQnAvi8u43hUCu19i1iZPjUFytnkB V4qFoJ0gtZQAtyiUIZCahFKgXfTcC1KGwmYQX92h0Fyl+wYGCapyaYLlfiIsWQCIpHyyB6NBl EwPEN2ALZhZkhF88k6CJJodDfrfmRn2tLAjAUsQWWntNI0F3pWqUvi2w6JjvMUuORJ5ZjCu3b O8m/hHu3O5GOOj+myBFRA1tQumg9Ph3H/6FMuaRaDQz7ZMblOryKEr89gpbKaMN5LR+hvQesA rneGfe0xt3ZEPb6ccdC1wrM+byX74ievg4M5OeYfsJBnbAueIpKYyIDMzh0SswIkhfkeEeasE 9L+ALB6KAQRTkveTRaS2uYZAwUSbSQ/TS5qxsrIQ24oTybKL0FHXODTgLJB1FVCRukz5wci3s xUfAGLffQIj3GgHLCpX2gMt1RH/JqysUfOy7WW+Dm+V6R278FWZgTDESQC8q3j6m/Kzviyzy1 Lwm4OBIP4Ac9Wsi37B7fUi0KHt2kx+2W6n4NT2KB5NiUbmXrjrszVEMA6hsyrV7dIFpa5WySi mQod/Ec Subject: [MirageOS-devel] utilizing multicore systems X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi! I would like to understand better how Mirage is used on multi-core systems. I understand that usually one unikernel can be started on each core. The unikernels would be totally independent and vchan can be used for connecting those unikernels. If all unikernel instances are of the same type (e.g. serving a website), is there any mechanism to support clustering or load sharing among them or would this have to be implemented manually by deploying a separate load balancer for instance? I'm considering buying ODROID-XU4 which provides several Cortex-A15 and Cortex-A7 cores. In that case, how can I define on which core a specific unikernel will be started? Thanks for your help. Stefan _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 15 15:27:06 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 15 Jan 2016 15:27:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK6HB-0003cS-7S; Fri, 15 Jan 2016 15:26:57 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK6HA-0003c2-CQ for mirageos-devel@lists.xenproject.org; Fri, 15 Jan 2016 15:26:56 +0000 Received: from [193.109.254.147] by server-9.bemta-14.messagelabs.com id 51/5D-13475-BBF09965; Fri, 15 Jan 2016 15:26:51 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-16.tower-27.messagelabs.com!1452871609!17105746!1 X-Originating-IP: [209.85.213.53] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 13966 invoked from network); 15 Jan 2016 15:26:50 -0000 Received: from mail-vk0-f53.google.com (HELO mail-vk0-f53.google.com) (209.85.213.53) by server-16.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 15 Jan 2016 15:26:50 -0000 Received: by mail-vk0-f53.google.com with SMTP id i129so161897452vkb.0 for ; Fri, 15 Jan 2016 07:26:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=c4wxzX2NtRxtZoKoP2y8SrJ85+BXF5J2gOTbhUdkmSs=; b=bibOzJqKJgaZ2kG7J3ZKIqOJptbZ+SlPm735plGorVHBZJqfMxVqPrI2uQW/OsPIwQ vq636vwCZyXyq/O3tMocmiZcN0/DhXZIAPO2RucKXDyEfpXel++sdmbLX+nlqbjnVcCf 7jRaMT6mk7m7Q3GyrgLJ0QA/uz0FuOwV3zW7i4nNFzadwZJnyK0TXmIHZJz8klKcc8Ta t4Ap7MkLTxYEx7Cq9+A2tBHsMM3W9hmXSm0qPQydTBn0sDZ+vMW4GLW4A/vMo+kiLbm8 Xq4uqmeK0v0gys2ErnUmNOfyxkTY1hRdm0sevH1tT7cDjgaa7YwE1jRfoUKZ/NWYEL5I LRJA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=c4wxzX2NtRxtZoKoP2y8SrJ85+BXF5J2gOTbhUdkmSs=; b=Ry5zIgvjctua77XRxgZJPrTsKgnzgnLAPdui9xwf82fIhHVMSQOancuqpKCrEWWGj6 +AOIpn1GxCDbjTfCn3pH7dE198XJoZfK23is359YoK3Fi9JNgQsvJPkoNR2hoxPJ0HeO t80d3ec8LMy5XdE1BGPT8SIv4VWXBZ5AP9VX2KOeVA+PTKkTh/tSKKAwh6qMBg8S+LbS gFI4vajxfdiOZxslN2Rv4FAHlB6oW6TQt1Mtik7vZ2AzL8jcwzkOWnWYvTLNEPwOXSUq xcwTuGlKLNM2CIoH4yV5FBEKbPWcWvJC+f3dCzGgU+znU8PJTHGYGYgdEYYS2dTcOC0f h/Uw== X-Gm-Message-State: ALoCoQnpSi9EEbY2ySMbTviRKE/FC47jZ3w6HnV3g/mNtuioypHv/2bKOLU0xgyWrtTuL2jbyOMPTa+sljWzNjDejXrRnHo0PA== MIME-Version: 1.0 X-Received: by 10.31.168.205 with SMTP id r196mr8075284vke.120.1452871609020; Fri, 15 Jan 2016 07:26:49 -0800 (PST) Received: by 10.31.128.84 with HTTP; Fri, 15 Jan 2016 07:26:48 -0800 (PST) In-Reply-To: References: Date: Fri, 15 Jan 2016 15:26:48 +0000 Message-ID: From: Thomas Leonard To: Vasilis Goumas Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] beginner contributing to mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 10 January 2016 at 23:07, Vasilis Goumas wrote: > Greetings, > > My name is Vasilis and I am a computer engineering student. > > Recently I discovered MirageOS project and I am since quite interested in > it. So I would like contributing some code. > > I have beginner Ocaml skills and I have never taken part in a software > project that big, so I view this also as an opportunity to sharpen these > skills. > > A beginner project I encountered is "local synchronization between git > repos", the first one noted under the category "storage" in [1]. > > Ideally, pairing me up with a mentor for completing the above, or other > beginner task would be cool :) > > [1] https://github.com/mirage/mirage-www/wiki/Pioneer-Projects Hi Vasilis, That's great. The mentor for git sync is Thomas Gazagnaire, who should be back from holiday next week. By the way, I'm not sure these star ratings are very accurate. This is a 1-star project, but it looks quite hard to me! Are you familiar with the Git protocol? If not, learning that and OCaml at the same time might be tricky. If anyone wants some really easy (but useful!) getting started tasks, I've added a pioneer project to find libraries using printf and update them to use Logs: https://github.com/mirage/mirage-www/wiki/Pioneer-Projects#logging -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 15 15:27:06 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 15 Jan 2016 15:27:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK6HB-0003cS-7S; Fri, 15 Jan 2016 15:26:57 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK6HA-0003c2-CQ for mirageos-devel@lists.xenproject.org; Fri, 15 Jan 2016 15:26:56 +0000 Received: from [193.109.254.147] by server-9.bemta-14.messagelabs.com id 51/5D-13475-BBF09965; Fri, 15 Jan 2016 15:26:51 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-16.tower-27.messagelabs.com!1452871609!17105746!1 X-Originating-IP: [209.85.213.53] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 13966 invoked from network); 15 Jan 2016 15:26:50 -0000 Received: from mail-vk0-f53.google.com (HELO mail-vk0-f53.google.com) (209.85.213.53) by server-16.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 15 Jan 2016 15:26:50 -0000 Received: by mail-vk0-f53.google.com with SMTP id i129so161897452vkb.0 for ; Fri, 15 Jan 2016 07:26:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=c4wxzX2NtRxtZoKoP2y8SrJ85+BXF5J2gOTbhUdkmSs=; b=bibOzJqKJgaZ2kG7J3ZKIqOJptbZ+SlPm735plGorVHBZJqfMxVqPrI2uQW/OsPIwQ vq636vwCZyXyq/O3tMocmiZcN0/DhXZIAPO2RucKXDyEfpXel++sdmbLX+nlqbjnVcCf 7jRaMT6mk7m7Q3GyrgLJ0QA/uz0FuOwV3zW7i4nNFzadwZJnyK0TXmIHZJz8klKcc8Ta t4Ap7MkLTxYEx7Cq9+A2tBHsMM3W9hmXSm0qPQydTBn0sDZ+vMW4GLW4A/vMo+kiLbm8 Xq4uqmeK0v0gys2ErnUmNOfyxkTY1hRdm0sevH1tT7cDjgaa7YwE1jRfoUKZ/NWYEL5I LRJA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=c4wxzX2NtRxtZoKoP2y8SrJ85+BXF5J2gOTbhUdkmSs=; b=Ry5zIgvjctua77XRxgZJPrTsKgnzgnLAPdui9xwf82fIhHVMSQOancuqpKCrEWWGj6 +AOIpn1GxCDbjTfCn3pH7dE198XJoZfK23is359YoK3Fi9JNgQsvJPkoNR2hoxPJ0HeO t80d3ec8LMy5XdE1BGPT8SIv4VWXBZ5AP9VX2KOeVA+PTKkTh/tSKKAwh6qMBg8S+LbS gFI4vajxfdiOZxslN2Rv4FAHlB6oW6TQt1Mtik7vZ2AzL8jcwzkOWnWYvTLNEPwOXSUq xcwTuGlKLNM2CIoH4yV5FBEKbPWcWvJC+f3dCzGgU+znU8PJTHGYGYgdEYYS2dTcOC0f h/Uw== X-Gm-Message-State: ALoCoQnpSi9EEbY2ySMbTviRKE/FC47jZ3w6HnV3g/mNtuioypHv/2bKOLU0xgyWrtTuL2jbyOMPTa+sljWzNjDejXrRnHo0PA== MIME-Version: 1.0 X-Received: by 10.31.168.205 with SMTP id r196mr8075284vke.120.1452871609020; Fri, 15 Jan 2016 07:26:49 -0800 (PST) Received: by 10.31.128.84 with HTTP; Fri, 15 Jan 2016 07:26:48 -0800 (PST) In-Reply-To: References: Date: Fri, 15 Jan 2016 15:26:48 +0000 Message-ID: From: Thomas Leonard To: Vasilis Goumas Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] beginner contributing to mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 10 January 2016 at 23:07, Vasilis Goumas wrote: > Greetings, > > My name is Vasilis and I am a computer engineering student. > > Recently I discovered MirageOS project and I am since quite interested in > it. So I would like contributing some code. > > I have beginner Ocaml skills and I have never taken part in a software > project that big, so I view this also as an opportunity to sharpen these > skills. > > A beginner project I encountered is "local synchronization between git > repos", the first one noted under the category "storage" in [1]. > > Ideally, pairing me up with a mentor for completing the above, or other > beginner task would be cool :) > > [1] https://github.com/mirage/mirage-www/wiki/Pioneer-Projects Hi Vasilis, That's great. The mentor for git sync is Thomas Gazagnaire, who should be back from holiday next week. By the way, I'm not sure these star ratings are very accurate. This is a 1-star project, but it looks quite hard to me! Are you familiar with the Git protocol? If not, learning that and OCaml at the same time might be tricky. If anyone wants some really easy (but useful!) getting started tasks, I've added a pioneer project to find libraries using printf and update them to use Logs: https://github.com/mirage/mirage-www/wiki/Pioneer-Projects#logging -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 15 15:43:13 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 15 Jan 2016 15:43:13 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK6Wt-0004mN-Bn; Fri, 15 Jan 2016 15:43:11 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK6Ws-0004mF-0F for MirageOS-devel@lists.xenproject.org; Fri, 15 Jan 2016 15:43:10 +0000 Received: from [85.158.139.211] by server-12.bemta-5.messagelabs.com id 02/D4-17089-D8319965; Fri, 15 Jan 2016 15:43:09 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-14.tower-206.messagelabs.com!1452872587!15833806!1 X-Originating-IP: [209.85.213.54] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 22337 invoked from network); 15 Jan 2016 15:43:08 -0000 Received: from mail-vk0-f54.google.com (HELO mail-vk0-f54.google.com) (209.85.213.54) by server-14.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 15 Jan 2016 15:43:08 -0000 Received: by mail-vk0-f54.google.com with SMTP id i129so162178531vkb.0 for ; Fri, 15 Jan 2016 07:43:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=a/2zdmRiMh49ZY4OCn2F8EEEVxv4ZcD2QQzMzu0+6wo=; b=yZLanaeJDHujzj8luNEu8VzFTED/pqOV8WOLOhmeR8kWsm1x/c2Z3UdTLZeyDT3BlY jYiQb7KNsBNlvPLsc8beyrT75vsQWV2Mot35TR/pfwjAdW7aPFzZK+B4diHHHg0GG78C bS+CDYmF7vGtSZkgaPo8H4xT1suulDTUtb4RLRmS1ni8ibIar/d3rPNbGByPkG1Llpbw pB86SndEYrWQ23/aXrG77HfQFwRYKArBWsRVRjS52QiI2x9M49ZAfY4LUW07p4OYEKxi GRg8wqmF+fwE+kRX4ciJ6BcBffkdfkOmYsyO8ncpJs3CoqYS7hesI9fUh0Ldz6K+QpUw qmAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=a/2zdmRiMh49ZY4OCn2F8EEEVxv4ZcD2QQzMzu0+6wo=; b=Y+4xMuoXXdkjCqiKyg3Wcz4opLd3fDfNQf17igaZZeihE9ArJ3xEM4Zr5oz61kSxrK FmjJckVYWbZNj0VLOAPP1gD/kwQ/J3GYAA3avjITO14BB1mV/7eJ0pX3IyLRSZ6YtWrJ 6jYb1BltDXRDlm1BojkmyCLCYwhHITvsP0DQYaMcP7PZW9MbaX8cvOz/3/DW9qtb3bXK +vTUl2KMskpv6JGo7lKPMjTp0g0g4LxNK/T/ywwOBHYTXf6kAegCXxXg4mApCLpT6Gll Gm33I1AWlVJsxlw358O3bYArtgJf4VrGknC/JnOQtp2y+jzBDmHtgPpyGEkv4RuVs5xo IXUQ== X-Gm-Message-State: ALoCoQnzUDABNeowOqFxg4Q4fpbIxDPlNS8jS+JLQH8Ja7zkgIwBpWblvs8QoyICRWB/jSvnDVFLfvps33Rmx10tBlEsnfyFMQ== MIME-Version: 1.0 X-Received: by 10.31.178.134 with SMTP id b128mr7284884vkf.112.1452872587579; Fri, 15 Jan 2016 07:43:07 -0800 (PST) Received: by 10.31.128.84 with HTTP; Fri, 15 Jan 2016 07:43:07 -0800 (PST) In-Reply-To: <5698B4D2.9080409@gmx.net> References: <5698B4D2.9080409@gmx.net> Date: Fri, 15 Jan 2016 15:43:07 +0000 Message-ID: From: Thomas Leonard To: Stefan Xenon Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] utilizing multicore systems X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 15 January 2016 at 08:58, Stefan Xenon wrote: > Hi! > I would like to understand better how Mirage is used on multi-core systems. > > I understand that usually one unikernel can be started on each core. The > unikernels would be totally independent and vchan can be used for > connecting those unikernels. If all unikernel instances are of the same > type (e.g. serving a website), is there any mechanism to support > clustering or load sharing among them or would this have to be > implemented manually by deploying a separate load balancer for instance? > > I'm considering buying ODROID-XU4 which provides several Cortex-A15 and > Cortex-A7 cores. In that case, how can I define on which core a specific > unikernel will be started? I'm not sure anyone has got Mirage working on the ODROID-XU4 yet: http://lists.xenproject.org/archives/html/minios-devel/2015-12/msg00025.html http://lists.xenproject.org/archives/html/minios-devel/2016-01/msg00000.html If you have time to fix it, that would be great though... -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 15 15:43:13 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 15 Jan 2016 15:43:13 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK6Wt-0004mN-Bn; Fri, 15 Jan 2016 15:43:11 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK6Ws-0004mF-0F for MirageOS-devel@lists.xenproject.org; Fri, 15 Jan 2016 15:43:10 +0000 Received: from [85.158.139.211] by server-12.bemta-5.messagelabs.com id 02/D4-17089-D8319965; Fri, 15 Jan 2016 15:43:09 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-14.tower-206.messagelabs.com!1452872587!15833806!1 X-Originating-IP: [209.85.213.54] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 22337 invoked from network); 15 Jan 2016 15:43:08 -0000 Received: from mail-vk0-f54.google.com (HELO mail-vk0-f54.google.com) (209.85.213.54) by server-14.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 15 Jan 2016 15:43:08 -0000 Received: by mail-vk0-f54.google.com with SMTP id i129so162178531vkb.0 for ; Fri, 15 Jan 2016 07:43:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=a/2zdmRiMh49ZY4OCn2F8EEEVxv4ZcD2QQzMzu0+6wo=; b=yZLanaeJDHujzj8luNEu8VzFTED/pqOV8WOLOhmeR8kWsm1x/c2Z3UdTLZeyDT3BlY jYiQb7KNsBNlvPLsc8beyrT75vsQWV2Mot35TR/pfwjAdW7aPFzZK+B4diHHHg0GG78C bS+CDYmF7vGtSZkgaPo8H4xT1suulDTUtb4RLRmS1ni8ibIar/d3rPNbGByPkG1Llpbw pB86SndEYrWQ23/aXrG77HfQFwRYKArBWsRVRjS52QiI2x9M49ZAfY4LUW07p4OYEKxi GRg8wqmF+fwE+kRX4ciJ6BcBffkdfkOmYsyO8ncpJs3CoqYS7hesI9fUh0Ldz6K+QpUw qmAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=a/2zdmRiMh49ZY4OCn2F8EEEVxv4ZcD2QQzMzu0+6wo=; b=Y+4xMuoXXdkjCqiKyg3Wcz4opLd3fDfNQf17igaZZeihE9ArJ3xEM4Zr5oz61kSxrK FmjJckVYWbZNj0VLOAPP1gD/kwQ/J3GYAA3avjITO14BB1mV/7eJ0pX3IyLRSZ6YtWrJ 6jYb1BltDXRDlm1BojkmyCLCYwhHITvsP0DQYaMcP7PZW9MbaX8cvOz/3/DW9qtb3bXK +vTUl2KMskpv6JGo7lKPMjTp0g0g4LxNK/T/ywwOBHYTXf6kAegCXxXg4mApCLpT6Gll Gm33I1AWlVJsxlw358O3bYArtgJf4VrGknC/JnOQtp2y+jzBDmHtgPpyGEkv4RuVs5xo IXUQ== X-Gm-Message-State: ALoCoQnzUDABNeowOqFxg4Q4fpbIxDPlNS8jS+JLQH8Ja7zkgIwBpWblvs8QoyICRWB/jSvnDVFLfvps33Rmx10tBlEsnfyFMQ== MIME-Version: 1.0 X-Received: by 10.31.178.134 with SMTP id b128mr7284884vkf.112.1452872587579; Fri, 15 Jan 2016 07:43:07 -0800 (PST) Received: by 10.31.128.84 with HTTP; Fri, 15 Jan 2016 07:43:07 -0800 (PST) In-Reply-To: <5698B4D2.9080409@gmx.net> References: <5698B4D2.9080409@gmx.net> Date: Fri, 15 Jan 2016 15:43:07 +0000 Message-ID: From: Thomas Leonard To: Stefan Xenon Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] utilizing multicore systems X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 15 January 2016 at 08:58, Stefan Xenon wrote: > Hi! > I would like to understand better how Mirage is used on multi-core systems. > > I understand that usually one unikernel can be started on each core. The > unikernels would be totally independent and vchan can be used for > connecting those unikernels. If all unikernel instances are of the same > type (e.g. serving a website), is there any mechanism to support > clustering or load sharing among them or would this have to be > implemented manually by deploying a separate load balancer for instance? > > I'm considering buying ODROID-XU4 which provides several Cortex-A15 and > Cortex-A7 cores. In that case, how can I define on which core a specific > unikernel will be started? I'm not sure anyone has got Mirage working on the ODROID-XU4 yet: http://lists.xenproject.org/archives/html/minios-devel/2015-12/msg00025.html http://lists.xenproject.org/archives/html/minios-devel/2016-01/msg00000.html If you have time to fix it, that would be great though... -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 15 16:15:36 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 15 Jan 2016 16:15:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK72D-00019Q-P9; Fri, 15 Jan 2016 16:15:33 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK72C-00019G-A8 for mirageos-devel@lists.xenproject.org; Fri, 15 Jan 2016 16:15:32 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 5B/74-08977-32B19965; Fri, 15 Jan 2016 16:15:31 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-10.tower-21.messagelabs.com!1452874530!10332330!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.2 required=7.0 tests=RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 39791 invoked from network); 15 Jan 2016 16:15:30 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-10.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 15 Jan 2016 16:15:30 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 281ee30a; Fri, 15 Jan 2016 16:15:29 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=o+zBs2focmiHaHHtsD78ZW2wvbY=; b=Eur6TF1qTeo3i9VOsn h/MtfM1Gt/O05oTI+AeBQweHsE404Lqc41MdCZKlzHxUd3Bh5XCAHWWYt4JKk2bv EN54oyUJJp+Xh8U4cwh3js82nN4AWSjWiybjLKCeP2XZ8T02n4MZJ0eI39lvV0an wJUT394FQbyWfJc+Q/RNu3UEU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= selector1; b=racsGEid/dkzxqiAibo2ZYYEZXaKDVeREsDoYnTrxAbkc6+FF0l 4aHKsiXI8OqQUfqkl5AxC0H6eaav6xy7mShuAD3Y+/cZNF0oW5GPfOQ9AwL0O5uq 5n06tVrJV4uJJQLyJVgEFbS5H90pWI5UDWi76djLFDeT9WZLtcZ66l98= Received: by bark.recoil.org (OpenSMTPD) with ESMTPSA id 8aed693f TLS version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO; Fri, 15 Jan 2016 16:15:29 +0000 (GMT) Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) From: Anil Madhavapeddy In-Reply-To: Date: Fri, 15 Jan 2016 16:15:28 +0000 Message-Id: <8800A03F-EB2A-418F-84C8-AA153305F720@recoil.org> References: To: Thomas Leonard X-Mailer: Apple Mail (2.3096.5) Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Unmapping grants is unsafe X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org > On 4 Jan 2016, at 14:26, Thomas Leonard wrote: > > On 3 January 2016 at 10:38, Thomas Leonard wrote: >> On 2 January 2016 at 14:35, Mindy wrote: >>> On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >>>> >>>> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>>>> >>>>> I have a Mirage firewall running now under Qubes: >>>>> >>>>> >>>>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ > [...] >>>>> - Mirage allows you to access memory after unmapping it. This isn't >>>>> safe (may page-fault or give access to someone else's data). I've >>>>> added checks in mirage-net-xen to make sure we don't try to access a >>>>> ring after unmapping it [1], but I think this should be fixed at the >>>>> Bigarray level [2]. >>>>> >>>> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >>>> have a checkout handy here and it's hard to map a commit to the >>>> associated PRs in the web UI. >> >> I haven't submitted a PR yet. Need to update it to master and test. > > https://github.com/ocaml/ocaml/pull/389 > > However, they're not keen on merging it, for performance reasons. > Also, it would mean changing Cstruct, which currently says: > >> We try to maintain the property that no constructed [t] can ever point out of >> its underlying buffer. This property is guarded by all of the constructing >> functions and the fact that the type is private, and used by various >> functions that would otherwise be completely unsafe. > > I wonder if we should instead change Gnt.Gnttab.Local_mapping.to_buf > so that instead of returning an Io_page it returns something else, > which provides similar operations but: > > a) checks every access to ensure it hasn't been unmapped, and > b) doesn't allow you to get a Cstruct or Bigarray from it. > > However, this would mean a largish API change. Before going through the epic amount of work that an API change would make in upstream libraries, perhaps we should build a small unit test that rapidly does a simple data copy across domains and benchmark it? I think any new API should do very explicit lifetimes for the grant buffers (i.e. not depend on the GC to cleanup), but also minimise copying the data if at all possible. While it's dangerous to read from a shared memory buffer if you don't trust the other side, an enforced copy does make it hard to build efficient unikernel proxies that are just transferring data across shared rings. Anil _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 15 16:15:36 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 15 Jan 2016 16:15:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK72D-00019Q-P9; Fri, 15 Jan 2016 16:15:33 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aK72C-00019G-A8 for mirageos-devel@lists.xenproject.org; Fri, 15 Jan 2016 16:15:32 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 5B/74-08977-32B19965; Fri, 15 Jan 2016 16:15:31 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-10.tower-21.messagelabs.com!1452874530!10332330!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.2 required=7.0 tests=RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 39791 invoked from network); 15 Jan 2016 16:15:30 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-10.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 15 Jan 2016 16:15:30 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 281ee30a; Fri, 15 Jan 2016 16:15:29 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=o+zBs2focmiHaHHtsD78ZW2wvbY=; b=Eur6TF1qTeo3i9VOsn h/MtfM1Gt/O05oTI+AeBQweHsE404Lqc41MdCZKlzHxUd3Bh5XCAHWWYt4JKk2bv EN54oyUJJp+Xh8U4cwh3js82nN4AWSjWiybjLKCeP2XZ8T02n4MZJ0eI39lvV0an wJUT394FQbyWfJc+Q/RNu3UEU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= selector1; b=racsGEid/dkzxqiAibo2ZYYEZXaKDVeREsDoYnTrxAbkc6+FF0l 4aHKsiXI8OqQUfqkl5AxC0H6eaav6xy7mShuAD3Y+/cZNF0oW5GPfOQ9AwL0O5uq 5n06tVrJV4uJJQLyJVgEFbS5H90pWI5UDWi76djLFDeT9WZLtcZ66l98= Received: by bark.recoil.org (OpenSMTPD) with ESMTPSA id 8aed693f TLS version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO; Fri, 15 Jan 2016 16:15:29 +0000 (GMT) Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) From: Anil Madhavapeddy In-Reply-To: Date: Fri, 15 Jan 2016 16:15:28 +0000 Message-Id: <8800A03F-EB2A-418F-84C8-AA153305F720@recoil.org> References: To: Thomas Leonard X-Mailer: Apple Mail (2.3096.5) Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Unmapping grants is unsafe X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org > On 4 Jan 2016, at 14:26, Thomas Leonard wrote: > > On 3 January 2016 at 10:38, Thomas Leonard wrote: >> On 2 January 2016 at 14:35, Mindy wrote: >>> On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >>>> >>>> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>>>> >>>>> I have a Mirage firewall running now under Qubes: >>>>> >>>>> >>>>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ > [...] >>>>> - Mirage allows you to access memory after unmapping it. This isn't >>>>> safe (may page-fault or give access to someone else's data). I've >>>>> added checks in mirage-net-xen to make sure we don't try to access a >>>>> ring after unmapping it [1], but I think this should be fixed at the >>>>> Bigarray level [2]. >>>>> >>>> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >>>> have a checkout handy here and it's hard to map a commit to the >>>> associated PRs in the web UI. >> >> I haven't submitted a PR yet. Need to update it to master and test. > > https://github.com/ocaml/ocaml/pull/389 > > However, they're not keen on merging it, for performance reasons. > Also, it would mean changing Cstruct, which currently says: > >> We try to maintain the property that no constructed [t] can ever point out of >> its underlying buffer. This property is guarded by all of the constructing >> functions and the fact that the type is private, and used by various >> functions that would otherwise be completely unsafe. > > I wonder if we should instead change Gnt.Gnttab.Local_mapping.to_buf > so that instead of returning an Io_page it returns something else, > which provides similar operations but: > > a) checks every access to ensure it hasn't been unmapped, and > b) doesn't allow you to get a Cstruct or Bigarray from it. > > However, this would mean a largish API change. Before going through the epic amount of work that an API change would make in upstream libraries, perhaps we should build a small unit test that rapidly does a simple data copy across domains and benchmark it? I think any new API should do very explicit lifetimes for the grant buffers (i.e. not depend on the GC to cleanup), but also minimise copying the data if at all possible. While it's dangerous to read from a shared memory buffer if you don't trust the other side, an enforced copy does make it hard to build efficient unikernel proxies that are just transferring data across shared rings. Anil _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 17 01:57:03 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 17 Jan 2016 01:57:03 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKcaI-0003jV-Pp; Sun, 17 Jan 2016 01:56:51 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKcaF-0003jQ-Mt for mirageos-devel@lists.xenproject.org; Sun, 17 Jan 2016 01:56:48 +0000 Received: from [85.158.139.211] by server-3.bemta-5.messagelabs.com id 56/AB-13487-ED4FA965; Sun, 17 Jan 2016 01:56:46 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-2.tower-206.messagelabs.com!1452995805!16312620!1 X-Originating-IP: [209.85.213.46] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 4756 invoked from network); 17 Jan 2016 01:56:46 -0000 Received: from mail-vk0-f46.google.com (HELO mail-vk0-f46.google.com) (209.85.213.46) by server-2.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Jan 2016 01:56:46 -0000 Received: by mail-vk0-f46.google.com with SMTP id n1so161999801vkb.3 for ; Sat, 16 Jan 2016 17:56:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=gg/Fy5i/kvxKNE7pcoQgyADRB200Ijjr5HzBQ9gVOUw=; b=geC2iI6ijkjkT0zIXYQwmafcVOaDqYbFXZN2kGYb8Md0kMQM2ZyWvaObcVl0g0Kqzt BPvyHKzaT1rZ9nWa85R1s4AGOWLN4V82zCGPZ5HalVIsPQDI2IsFI/H7ASJLr7yjgn55 JDK9vL4YhGrknWEsIUSsWgWFQ5zfwJBPJlLhL6yKFNNbQXx/9ZeC2g2DdT8QLpCVLeVD Bd1usitvMa2HMxW1aEb4xeTnQnZjQL5HBfHby25CvBp8s22FrEIWg/579j2KiUqlchMV t8Reru68AjWs17KzDbWBLF1KtmqINGOIAJNEQLGSDAnp+FeVxDAJQycmwl+bGnmRSbbd 5exw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=gg/Fy5i/kvxKNE7pcoQgyADRB200Ijjr5HzBQ9gVOUw=; b=lnkahv/hsnURmXunE+ANXdGurUnDtjsYpunSCxKZW7wmGf/TegWkXJ9VIPgNylE1Pk n1q5rwDWjF5hiuPGQ7PsSgwGSSY68D/El68X4JZMXEH0tfWEbq1L427TYGqWlItSp2HL Ez8SukD4eyDCpC1gpnCsMsJzRgXveaUhQ01wgNIYV5nZtZqjjuzUhhzwl1eoBtmkNv/J h5ngNd1gimizYC0fgvAFOB0e4xyuOnfHhUSSOAb+wG4z/rtj9mSPdIhbk+/ubtmt7Clf 6oM2ACP4EACG4jEZmnufoaMMeAdTkFmQlvrjMm/cWwN8i3ElQsfp1Wjfnt+wXKbtnjWs kKTQ== X-Gm-Message-State: ALoCoQma1nM4MWhDUjMUVnE6sGH6YCi/R+bsrRT5iR/Xida/Sk4dI7aMD1+2ALaLPvCWhTNolBsBXG+q9Ub+iU1NtFbh3sU9Pg== X-Received: by 10.31.173.79 with SMTP id w76mr12666295vke.64.1452995805240; Sat, 16 Jan 2016 17:56:45 -0800 (PST) Received: from mail-vk0-f46.google.com (mail-vk0-f46.google.com. [209.85.213.46]) by smtp.gmail.com with ESMTPSA id v19sm3995647vkd.22.2016.01.16.17.56.44 for (version=TLSv1/SSLv3 cipher=OTHER); Sat, 16 Jan 2016 17:56:44 -0800 (PST) Received: by mail-vk0-f46.google.com with SMTP id n1so161999730vkb.3 for ; Sat, 16 Jan 2016 17:56:44 -0800 (PST) X-Received: by 10.31.49.207 with SMTP id x198mr12981769vkx.1.1452995804557; Sat, 16 Jan 2016 17:56:44 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Sat, 16 Jan 2016 17:56:25 -0800 (PST) In-Reply-To: <5697B393.4060706@mehnert.org> References: <5697B393.4060706@mehnert.org> From: Tim Cuthbertson Date: Sun, 17 Jan 2016 12:56:25 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Hannes Mehnert Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Fri, Jan 15, 2016 at 1:41 AM, Hannes Mehnert wrote: > Hi Tim, > > On 01/08/2016 11:19, Tim Cuthbertson wrote: >> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >> There is sadly no `safepass-xen` package, and trying to just use >> `safepass` results in link errors: > > I wonder whether it'd be more than a day of work to implement bcrypt > directly in OCaml. Would for sure safe from linking trouble (and be > automatically memory safe). An initial version might be 50% or 90% of > the speed of the pure C variant, but does this really matter for bcrypt? I would certainly be happy with an ocaml implementation, but am not sure that I'd trust myself to code one up, not having implemented any low-level crypto algorithms before. If https://github.com/mirleft/ocaml-nocrypto/issues/71 happened I'd probably be pleased :) Cheers, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 17 01:57:03 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 17 Jan 2016 01:57:03 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKcaI-0003jV-Pp; Sun, 17 Jan 2016 01:56:51 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKcaF-0003jQ-Mt for mirageos-devel@lists.xenproject.org; Sun, 17 Jan 2016 01:56:48 +0000 Received: from [85.158.139.211] by server-3.bemta-5.messagelabs.com id 56/AB-13487-ED4FA965; Sun, 17 Jan 2016 01:56:46 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-2.tower-206.messagelabs.com!1452995805!16312620!1 X-Originating-IP: [209.85.213.46] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 4756 invoked from network); 17 Jan 2016 01:56:46 -0000 Received: from mail-vk0-f46.google.com (HELO mail-vk0-f46.google.com) (209.85.213.46) by server-2.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Jan 2016 01:56:46 -0000 Received: by mail-vk0-f46.google.com with SMTP id n1so161999801vkb.3 for ; Sat, 16 Jan 2016 17:56:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=gg/Fy5i/kvxKNE7pcoQgyADRB200Ijjr5HzBQ9gVOUw=; b=geC2iI6ijkjkT0zIXYQwmafcVOaDqYbFXZN2kGYb8Md0kMQM2ZyWvaObcVl0g0Kqzt BPvyHKzaT1rZ9nWa85R1s4AGOWLN4V82zCGPZ5HalVIsPQDI2IsFI/H7ASJLr7yjgn55 JDK9vL4YhGrknWEsIUSsWgWFQ5zfwJBPJlLhL6yKFNNbQXx/9ZeC2g2DdT8QLpCVLeVD Bd1usitvMa2HMxW1aEb4xeTnQnZjQL5HBfHby25CvBp8s22FrEIWg/579j2KiUqlchMV t8Reru68AjWs17KzDbWBLF1KtmqINGOIAJNEQLGSDAnp+FeVxDAJQycmwl+bGnmRSbbd 5exw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=gg/Fy5i/kvxKNE7pcoQgyADRB200Ijjr5HzBQ9gVOUw=; b=lnkahv/hsnURmXunE+ANXdGurUnDtjsYpunSCxKZW7wmGf/TegWkXJ9VIPgNylE1Pk n1q5rwDWjF5hiuPGQ7PsSgwGSSY68D/El68X4JZMXEH0tfWEbq1L427TYGqWlItSp2HL Ez8SukD4eyDCpC1gpnCsMsJzRgXveaUhQ01wgNIYV5nZtZqjjuzUhhzwl1eoBtmkNv/J h5ngNd1gimizYC0fgvAFOB0e4xyuOnfHhUSSOAb+wG4z/rtj9mSPdIhbk+/ubtmt7Clf 6oM2ACP4EACG4jEZmnufoaMMeAdTkFmQlvrjMm/cWwN8i3ElQsfp1Wjfnt+wXKbtnjWs kKTQ== X-Gm-Message-State: ALoCoQma1nM4MWhDUjMUVnE6sGH6YCi/R+bsrRT5iR/Xida/Sk4dI7aMD1+2ALaLPvCWhTNolBsBXG+q9Ub+iU1NtFbh3sU9Pg== X-Received: by 10.31.173.79 with SMTP id w76mr12666295vke.64.1452995805240; Sat, 16 Jan 2016 17:56:45 -0800 (PST) Received: from mail-vk0-f46.google.com (mail-vk0-f46.google.com. [209.85.213.46]) by smtp.gmail.com with ESMTPSA id v19sm3995647vkd.22.2016.01.16.17.56.44 for (version=TLSv1/SSLv3 cipher=OTHER); Sat, 16 Jan 2016 17:56:44 -0800 (PST) Received: by mail-vk0-f46.google.com with SMTP id n1so161999730vkb.3 for ; Sat, 16 Jan 2016 17:56:44 -0800 (PST) X-Received: by 10.31.49.207 with SMTP id x198mr12981769vkx.1.1452995804557; Sat, 16 Jan 2016 17:56:44 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Sat, 16 Jan 2016 17:56:25 -0800 (PST) In-Reply-To: <5697B393.4060706@mehnert.org> References: <5697B393.4060706@mehnert.org> From: Tim Cuthbertson Date: Sun, 17 Jan 2016 12:56:25 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Hannes Mehnert Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Fri, Jan 15, 2016 at 1:41 AM, Hannes Mehnert wrote: > Hi Tim, > > On 01/08/2016 11:19, Tim Cuthbertson wrote: >> I'd like to use `Bcrypt` from the `safepass` opam module in passe[0]. >> There is sadly no `safepass-xen` package, and trying to just use >> `safepass` results in link errors: > > I wonder whether it'd be more than a day of work to implement bcrypt > directly in OCaml. Would for sure safe from linking trouble (and be > automatically memory safe). An initial version might be 50% or 90% of > the speed of the pure C variant, but does this really matter for bcrypt? I would certainly be happy with an ocaml implementation, but am not sure that I'd trust myself to code one up, not having implemented any low-level crypto algorithms before. If https://github.com/mirleft/ocaml-nocrypto/issues/71 happened I'd probably be pleased :) Cheers, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 17 01:57:31 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 17 Jan 2016 01:57:31 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKcav-0003l3-5o; Sun, 17 Jan 2016 01:57:29 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKcar-0003ku-8N for mirageos-devel@lists.xenproject.org; Sun, 17 Jan 2016 01:57:25 +0000 Received: from [193.109.254.147] by server-8.bemta-14.messagelabs.com id E7/85-24450-405FA965; Sun, 17 Jan 2016 01:57:24 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-8.tower-27.messagelabs.com!1452995842!13567362!1 X-Originating-IP: [209.85.213.42] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 4022 invoked from network); 17 Jan 2016 01:57:23 -0000 Received: from mail-vk0-f42.google.com (HELO mail-vk0-f42.google.com) (209.85.213.42) by server-8.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Jan 2016 01:57:23 -0000 Received: by mail-vk0-f42.google.com with SMTP id i129so178245004vkb.0 for ; Sat, 16 Jan 2016 17:57:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=GfkuQlymWANKpD77zpTV7OiFF3VMfeMoHOjDqkR9RYQ=; b=xlsJBsSi8ZTw5HL92eJdE0dAY7Ya0uX56xs9XHNb5C7sE5eoxRa22dQL6LQwARZ7HB ZLQ/UVu1joDoSX8/IUTgNi/LgIF/KtYCurOZ9W3CdFE4Ve8qJ25KLRRA8I3XIukeTA5i uWeBmyJVRo3a5e0/CQ+W1KhQl+gzGRAck+XCiCKL/9k54Y4u2Okuu5nSHaZ1YGhfPOod rWyLC95cY9SvbBm6Y5nJT8DusTAEIxxf/Xky50JHnjVl43nAnbH/q7E24ffaa54XB2sn npRQMmZfZkO/xHaSqTTIW9JK0ovRUeYXEx7A58gcwSbSeBXyxdc4VENrHKC7EFzNKf0Q jhAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=GfkuQlymWANKpD77zpTV7OiFF3VMfeMoHOjDqkR9RYQ=; b=LuIdPnYOVtfi+3BumT4/joKYHi7kxo2VgpKWaNGwrC+6t2xGoxJO4jFhAdoe9AV3sH +Mftg5t7/xQ5t3lDDcl05K39aY6uIE/5u0DNME2PQGRsH0gdgnNN+iZmZRk3c3l5ngG+ 2vX9B8QuSZ4HDucSkVVmWxFPMKNB74doY/5D4ZEli8SqUvJSFWgMFFI+rDdfUhjMxMPs 9to7+cFYb5lup9kBvY8sOrM2pcQIMAgV3KNVIWCnYvdGIql76YVS9LBf+ymzMhLiQ60D s0L1XP1HvlhYJQ4IiwB/+Wf4/XLR0UUeO7XPrAL8afEAVONDnAAjXrjbwhYiTLHl7hn6 yiOg== X-Gm-Message-State: AG10YOQKp8rsY1LT5/VbdnTaEI/j0bAWRwlHHmUDKg77PCNjjy1CsKKmEQGSQSJ2RpGNNg== X-Received: by 10.31.182.69 with SMTP id g66mr7542292vkf.73.1452995842383; Sat, 16 Jan 2016 17:57:22 -0800 (PST) Received: from mail-vk0-f54.google.com (mail-vk0-f54.google.com. [209.85.213.54]) by smtp.gmail.com with ESMTPSA id t72sm3975881vke.28.2016.01.16.17.57.21 for (version=TLSv1/SSLv3 cipher=OTHER); Sat, 16 Jan 2016 17:57:22 -0800 (PST) Received: by mail-vk0-f54.google.com with SMTP id k1so316463495vkb.2 for ; Sat, 16 Jan 2016 17:57:21 -0800 (PST) X-Received: by 10.31.16.140 with SMTP id 12mr12074047vkq.106.1452995841916; Sat, 16 Jan 2016 17:57:21 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Sat, 16 Jan 2016 17:57:02 -0800 (PST) In-Reply-To: <201601121517.u0CFHLhe002351@d01av01.pok.ibm.com> References: <201601121517.u0CFHLhe002351@d01av01.pok.ibm.com> From: Tim Cuthbertson Date: Sun, 17 Jan 2016 12:57:02 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Daniel J Williams Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Wed, Jan 13, 2016 at 2:17 AM, Daniel J Williams wrote: > >> On Mon, Jan 11, 2016 at 9:48 PM, Thomas Leonard wrote: >> > On 11 January 2016 at 09:06, Tim Cuthbertson wrote: >> >> On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard >> >> wrote: >> >>> On 10 January 2016 at 10:15, Tim Cuthbertson wrote: >> >>>> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard >> >>>> wrote: >> >>>>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: > >> >>>>>> - I don't really know what the thing I'm doing is. Is mirage-xen a >> >>>>>> different architecture? A different ABI? Do C libraries need to be >> >>>>>> cross-compiled, or just compiled with particular flags so that >> >>>>>> they'll >> >>>>>> work on xen-minios instead of gnu/linux? >> >>>>> >> >>>>> C libraries need to be compiled with different headers and flags (in >> >>>>> particular, -mno-red-zone). Using libraries compiled for Linux will >> >>>>> often appear to work, but may fail when interrupts occur, so the >> >>>>> build >> >>>>> makes it hard to use them by accident. >> >>>>> >> >>>>> However, OCaml binaries can be shared (ocamlopt doesn't use a red >> >>>>> zone >> >>>>> and the OCaml ABI is the same). >> >>>>> >> >>>>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >> >>>>>> mainly with particular CFLAGS >> >>>>>> (https://github.com/ocaml/opam-repository/blob/master/ >> packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >> >>>>> >> >>>>> It's using pkg-config to get the important flags. The others are >> >>>>> optimisations (except -fno-builtin, which is either not needed or >> >>>>> should be supplied by Mini-OS). >> >>>>> >> >>>>>> while gmp looks like a full cross-compilation using `--target` (and >> >>>>>> then does some other sneaky things). >> >>>>>> >> >>>>>> safepass uses OASIS for its build system, which doesn't seem to >> >>>>>> have >> >>>>>> any cross-compilation functionality built in as far as I could >> >>>>>> tell. >> >>>>>> Can anyone give me pointers on what I'd need to do to safepass' >> >>>>>> build >> >>>>>> scripts to get this working in mirage-xen, or at the least some >> >>>>>> clarification on why it doesn't work as-is and how cross >> >>>>>> compilation >> >>>>>> works for C libraries used in mirage-xen? > > >> > Correct: Mirage on Xen does not use shared libraries. I don't know how >> > to prevent them from being built. The easiest option might be to >> > remove the uses of errno from the library (it doesn't look like the >> > OCaml bindings do anything with it anyway). >> >> The ocaml bindings (bcrypt_stub.c) doesn't, but the C code compiled >> with it (crypt_blowfish.c) does, so I can't just remove it sadly. >> >> So this is a bit ridiculous, but I did manage to get it compiling with >> the following hack in the build script: >> >> mkdir fake_libc >> echo '"fake_libc": -traverse' >> _tags >> touch fake_libc/libc.c >> gcc -shared -nostdlib -o fake_libc/libc.so fake_libc/libc.c >> >> (and also added -L$PWD/fake_libc to oasis' CCLib field) >> > > I'm not sure if this will help, but I thought I'd share my > "workaround" for compiling C files from Mirage components to link > against Solo5(https://github.com/djwillia/solo5/tree/mirage), which > you can think of as a layer like Mini-OS. > > The ability to send flags to C programs from OASIS seems a bit limited > to me: I would have liked to specify the cross compiler, but I'm not > sure if that's possible. I don't really know what the right way to do > this is, but I ended up adding a lot of CFLAGS from the kernel build: > > CCOpt: -ffreestanding -mcmodel=large -mno-red-zone -mno-3dnow \ > -std=gnu99 -O2 -Wall -Wextra -Werror -D__SOLO5__ \ > -fno-PIC -g -I/home/solo5/solo5/kernel > > ( see https://github.com/djwillia/mirage-block-solo5/blob/solo5/_oasis#L17 ) > > Then I link against the resulting libmirage_block_solo5_stubs.a and > all of the static libraries listed out from e.g., `pkg-config --static > --libs mirage-xen` > > Dan Thanks, Dan. Does this prevent oasis from building a .so file of your library? I think I've got similar CCOpt setting by using `pkg-config --static --cflags mirage-xen-ocaml`, but my main issue is really that I've found no CCLib options which can prevent oasis from trying to compile a .so of my library against an incompatible libc.so. Cheers, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 17 01:57:31 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 17 Jan 2016 01:57:31 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKcav-0003l3-5o; Sun, 17 Jan 2016 01:57:29 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKcar-0003ku-8N for mirageos-devel@lists.xenproject.org; Sun, 17 Jan 2016 01:57:25 +0000 Received: from [193.109.254.147] by server-8.bemta-14.messagelabs.com id E7/85-24450-405FA965; Sun, 17 Jan 2016 01:57:24 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-8.tower-27.messagelabs.com!1452995842!13567362!1 X-Originating-IP: [209.85.213.42] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 4022 invoked from network); 17 Jan 2016 01:57:23 -0000 Received: from mail-vk0-f42.google.com (HELO mail-vk0-f42.google.com) (209.85.213.42) by server-8.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Jan 2016 01:57:23 -0000 Received: by mail-vk0-f42.google.com with SMTP id i129so178245004vkb.0 for ; Sat, 16 Jan 2016 17:57:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=GfkuQlymWANKpD77zpTV7OiFF3VMfeMoHOjDqkR9RYQ=; b=xlsJBsSi8ZTw5HL92eJdE0dAY7Ya0uX56xs9XHNb5C7sE5eoxRa22dQL6LQwARZ7HB ZLQ/UVu1joDoSX8/IUTgNi/LgIF/KtYCurOZ9W3CdFE4Ve8qJ25KLRRA8I3XIukeTA5i uWeBmyJVRo3a5e0/CQ+W1KhQl+gzGRAck+XCiCKL/9k54Y4u2Okuu5nSHaZ1YGhfPOod rWyLC95cY9SvbBm6Y5nJT8DusTAEIxxf/Xky50JHnjVl43nAnbH/q7E24ffaa54XB2sn npRQMmZfZkO/xHaSqTTIW9JK0ovRUeYXEx7A58gcwSbSeBXyxdc4VENrHKC7EFzNKf0Q jhAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=GfkuQlymWANKpD77zpTV7OiFF3VMfeMoHOjDqkR9RYQ=; b=LuIdPnYOVtfi+3BumT4/joKYHi7kxo2VgpKWaNGwrC+6t2xGoxJO4jFhAdoe9AV3sH +Mftg5t7/xQ5t3lDDcl05K39aY6uIE/5u0DNME2PQGRsH0gdgnNN+iZmZRk3c3l5ngG+ 2vX9B8QuSZ4HDucSkVVmWxFPMKNB74doY/5D4ZEli8SqUvJSFWgMFFI+rDdfUhjMxMPs 9to7+cFYb5lup9kBvY8sOrM2pcQIMAgV3KNVIWCnYvdGIql76YVS9LBf+ymzMhLiQ60D s0L1XP1HvlhYJQ4IiwB/+Wf4/XLR0UUeO7XPrAL8afEAVONDnAAjXrjbwhYiTLHl7hn6 yiOg== X-Gm-Message-State: AG10YOQKp8rsY1LT5/VbdnTaEI/j0bAWRwlHHmUDKg77PCNjjy1CsKKmEQGSQSJ2RpGNNg== X-Received: by 10.31.182.69 with SMTP id g66mr7542292vkf.73.1452995842383; Sat, 16 Jan 2016 17:57:22 -0800 (PST) Received: from mail-vk0-f54.google.com (mail-vk0-f54.google.com. [209.85.213.54]) by smtp.gmail.com with ESMTPSA id t72sm3975881vke.28.2016.01.16.17.57.21 for (version=TLSv1/SSLv3 cipher=OTHER); Sat, 16 Jan 2016 17:57:22 -0800 (PST) Received: by mail-vk0-f54.google.com with SMTP id k1so316463495vkb.2 for ; Sat, 16 Jan 2016 17:57:21 -0800 (PST) X-Received: by 10.31.16.140 with SMTP id 12mr12074047vkq.106.1452995841916; Sat, 16 Jan 2016 17:57:21 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Sat, 16 Jan 2016 17:57:02 -0800 (PST) In-Reply-To: <201601121517.u0CFHLhe002351@d01av01.pok.ibm.com> References: <201601121517.u0CFHLhe002351@d01av01.pok.ibm.com> From: Tim Cuthbertson Date: Sun, 17 Jan 2016 12:57:02 +1100 X-Gmail-Original-Message-ID: Message-ID: To: Daniel J Williams Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Compiling C components for mirage-xen X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Wed, Jan 13, 2016 at 2:17 AM, Daniel J Williams wrote: > >> On Mon, Jan 11, 2016 at 9:48 PM, Thomas Leonard wrote: >> > On 11 January 2016 at 09:06, Tim Cuthbertson wrote: >> >> On Mon, Jan 11, 2016 at 4:52 AM, Thomas Leonard >> >> wrote: >> >>> On 10 January 2016 at 10:15, Tim Cuthbertson wrote: >> >>>> On Fri, Jan 8, 2016 at 11:14 PM, Thomas Leonard >> >>>> wrote: >> >>>>> On 8 January 2016 at 11:19, Tim Cuthbertson wrote: > >> >>>>>> - I don't really know what the thing I'm doing is. Is mirage-xen a >> >>>>>> different architecture? A different ABI? Do C libraries need to be >> >>>>>> cross-compiled, or just compiled with particular flags so that >> >>>>>> they'll >> >>>>>> work on xen-minios instead of gnu/linux? >> >>>>> >> >>>>> C libraries need to be compiled with different headers and flags (in >> >>>>> particular, -mno-red-zone). Using libraries compiled for Linux will >> >>>>> often appear to work, but may fail when interrupts occur, so the >> >>>>> build >> >>>>> makes it hard to use them by accident. >> >>>>> >> >>>>> However, OCaml binaries can be shared (ocamlopt doesn't use a red >> >>>>> zone >> >>>>> and the OCaml ABI is the same). >> >>>>> >> >>>>>> - The existing scripts seem to be pretty ad-hoc - zarith gets away >> >>>>>> mainly with particular CFLAGS >> >>>>>> (https://github.com/ocaml/opam-repository/blob/master/ >> packages/zarith-xen/zarith-xen.1.4/files/mirage-install.sh), >> >>>>> >> >>>>> It's using pkg-config to get the important flags. The others are >> >>>>> optimisations (except -fno-builtin, which is either not needed or >> >>>>> should be supplied by Mini-OS). >> >>>>> >> >>>>>> while gmp looks like a full cross-compilation using `--target` (and >> >>>>>> then does some other sneaky things). >> >>>>>> >> >>>>>> safepass uses OASIS for its build system, which doesn't seem to >> >>>>>> have >> >>>>>> any cross-compilation functionality built in as far as I could >> >>>>>> tell. >> >>>>>> Can anyone give me pointers on what I'd need to do to safepass' >> >>>>>> build >> >>>>>> scripts to get this working in mirage-xen, or at the least some >> >>>>>> clarification on why it doesn't work as-is and how cross >> >>>>>> compilation >> >>>>>> works for C libraries used in mirage-xen? > > >> > Correct: Mirage on Xen does not use shared libraries. I don't know how >> > to prevent them from being built. The easiest option might be to >> > remove the uses of errno from the library (it doesn't look like the >> > OCaml bindings do anything with it anyway). >> >> The ocaml bindings (bcrypt_stub.c) doesn't, but the C code compiled >> with it (crypt_blowfish.c) does, so I can't just remove it sadly. >> >> So this is a bit ridiculous, but I did manage to get it compiling with >> the following hack in the build script: >> >> mkdir fake_libc >> echo '"fake_libc": -traverse' >> _tags >> touch fake_libc/libc.c >> gcc -shared -nostdlib -o fake_libc/libc.so fake_libc/libc.c >> >> (and also added -L$PWD/fake_libc to oasis' CCLib field) >> > > I'm not sure if this will help, but I thought I'd share my > "workaround" for compiling C files from Mirage components to link > against Solo5(https://github.com/djwillia/solo5/tree/mirage), which > you can think of as a layer like Mini-OS. > > The ability to send flags to C programs from OASIS seems a bit limited > to me: I would have liked to specify the cross compiler, but I'm not > sure if that's possible. I don't really know what the right way to do > this is, but I ended up adding a lot of CFLAGS from the kernel build: > > CCOpt: -ffreestanding -mcmodel=large -mno-red-zone -mno-3dnow \ > -std=gnu99 -O2 -Wall -Wextra -Werror -D__SOLO5__ \ > -fno-PIC -g -I/home/solo5/solo5/kernel > > ( see https://github.com/djwillia/mirage-block-solo5/blob/solo5/_oasis#L17 ) > > Then I link against the resulting libmirage_block_solo5_stubs.a and > all of the static libraries listed out from e.g., `pkg-config --static > --libs mirage-xen` > > Dan Thanks, Dan. Does this prevent oasis from building a .so file of your library? I think I've got similar CCOpt setting by using `pkg-config --static --cflags mirage-xen-ocaml`, but my main issue is really that I've found no CCLib options which can prevent oasis from trying to compile a .so of my library against an incompatible libc.so. Cheers, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 17 14:54:47 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 17 Jan 2016 14:54:47 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKoiw-0005PC-D8; Sun, 17 Jan 2016 14:54:34 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKoir-0005Ow-QS for mirageos-devel@lists.xenproject.org; Sun, 17 Jan 2016 14:54:30 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id D2/D8-08977-52BAB965; Sun, 17 Jan 2016 14:54:29 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-15.tower-21.messagelabs.com!1453042467!10526711!1 X-Originating-IP: [209.85.213.48] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 1662 invoked from network); 17 Jan 2016 14:54:28 -0000 Received: from mail-vk0-f48.google.com (HELO mail-vk0-f48.google.com) (209.85.213.48) by server-15.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Jan 2016 14:54:28 -0000 Received: by mail-vk0-f48.google.com with SMTP id i129so182030121vkb.0 for ; Sun, 17 Jan 2016 06:54:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=vSgBaeld1/SfLBg7teoLcd3oNbC0RV9JJizpbry6irI=; b=gPeB1jK5zFcJIGgIIqtWHux5BuDcJARjNFP7D47+uBGeSvFvcNOX6lTiKFvdKQ3vpz i1r1DeSjFh2tJIqXIwlUeSUujCy39R0VDgCzxBnmaPGlESNmLnAB/948iPOS2yH/nl1x /h3EWL3XjP7n4azHgKcszOgxWcnXR06WqJMzJFHRvlfUQKOhEcr+BhMwoYq4OLNiTR+C lu6kF8ZwurS/sDz5IBh232BeDO5eTaSKxSxqKXec1bDEtZ4I8gtV3z942+KAS68D3+qU QBVGF10kyP4LbP6PsxtRFzzsp+w+IBvhMJtbksjpF9zueay4AfsUR4O7f5oyBJ6zhaYQ sPCg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=vSgBaeld1/SfLBg7teoLcd3oNbC0RV9JJizpbry6irI=; b=czG9O+BroT+Yyc9BAHzESYMFROVrPJlzRSEaRwAEJhQzV5ZJrvZJ39DA/DFgfh0X4y B7DebItYTA16I9TYwnxZPMsHs13BeHo5j4Wqm1apHAt/r6jKWLoAQgt9QtBVb676FSm3 PHyjFDPQKyXm9fGK/mJUgZP9CdWeQO/te9tWGuGPRzliroggO3LbdfiQTfgcbBauCqWC rudVl0INZn/3G5Topj0wMqOBu81i5+LHD2FjnIjf5XZkTIOko1PO2+CQJDxLtc73VmAV dkBJcztZGmN/qKwEEyBei8yIWvzUc7TBoVtW+1IaW4YjlchF9v8mM7hhI1uHLrf4yiO1 q7cw== X-Gm-Message-State: ALoCoQnV4YhdUCevHC167V1xcywAtxCGP7FLc+xwc4+vNXW87fKQkpWg0YE5M2EMUpJ0YhQkIeg+oQHtOtp13pBb2FFFs+ChiA== MIME-Version: 1.0 X-Received: by 10.31.47.200 with SMTP id v191mr15104572vkv.116.1453042467200; Sun, 17 Jan 2016 06:54:27 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sun, 17 Jan 2016 06:54:27 -0800 (PST) In-Reply-To: <8800A03F-EB2A-418F-84C8-AA153305F720@recoil.org> References: <8800A03F-EB2A-418F-84C8-AA153305F720@recoil.org> Date: Sun, 17 Jan 2016 14:54:27 +0000 Message-ID: From: Thomas Leonard To: Anil Madhavapeddy Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Unmapping grants is unsafe X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 15 January 2016 at 16:15, Anil Madhavapeddy wrote: > >> On 4 Jan 2016, at 14:26, Thomas Leonard wrote: >> >> On 3 January 2016 at 10:38, Thomas Leonard wrote: >>> On 2 January 2016 at 14:35, Mindy wrote: >>>> On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >>>>> >>>>> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>>>>> >>>>>> I have a Mirage firewall running now under Qubes: >>>>>> >>>>>> >>>>>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ >> [...] >>>>>> - Mirage allows you to access memory after unmapping it. This isn't >>>>>> safe (may page-fault or give access to someone else's data). I've >>>>>> added checks in mirage-net-xen to make sure we don't try to access a >>>>>> ring after unmapping it [1], but I think this should be fixed at the >>>>>> Bigarray level [2]. >>>>>> >>>>> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >>>>> have a checkout handy here and it's hard to map a commit to the >>>>> associated PRs in the web UI. >>> >>> I haven't submitted a PR yet. Need to update it to master and test. >> >> https://github.com/ocaml/ocaml/pull/389 >> >> However, they're not keen on merging it, for performance reasons. >> Also, it would mean changing Cstruct, which currently says: >> >>> We try to maintain the property that no constructed [t] can ever point out of >>> its underlying buffer. This property is guarded by all of the constructing >>> functions and the fact that the type is private, and used by various >>> functions that would otherwise be completely unsafe. >> >> I wonder if we should instead change Gnt.Gnttab.Local_mapping.to_buf >> so that instead of returning an Io_page it returns something else, >> which provides similar operations but: >> >> a) checks every access to ensure it hasn't been unmapped, and >> b) doesn't allow you to get a Cstruct or Bigarray from it. >> >> However, this would mean a largish API change. > > Before going through the epic amount of work that an API change would make in upstream libraries, perhaps we should build a small unit test that rapidly does a simple data copy across domains and benchmark it? > > I think any new API should do very explicit lifetimes for the grant buffers (i.e. not depend on the GC to cleanup), but also minimise copying the data if at all possible. While it's dangerous to read from a shared memory buffer if you don't trust the other side, an enforced copy does make it hard to build efficient unikernel proxies that are just transferring data across shared rings. A simpler solution might be to rename [to_buf] to [to_buf_unsafe] and provide a safe [blit] operation (that fails if the buffer is no longer mapped). The block and net drivers already copy, so they could use the safe interface. shared-memory-ring currently reads directly, but maybe it shouldn't anyway (whether frontend or backend) to avoid TOCTOU issues. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 17 14:54:47 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 17 Jan 2016 14:54:47 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKoiw-0005PC-D8; Sun, 17 Jan 2016 14:54:34 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKoir-0005Ow-QS for mirageos-devel@lists.xenproject.org; Sun, 17 Jan 2016 14:54:30 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id D2/D8-08977-52BAB965; Sun, 17 Jan 2016 14:54:29 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-15.tower-21.messagelabs.com!1453042467!10526711!1 X-Originating-IP: [209.85.213.48] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 1662 invoked from network); 17 Jan 2016 14:54:28 -0000 Received: from mail-vk0-f48.google.com (HELO mail-vk0-f48.google.com) (209.85.213.48) by server-15.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Jan 2016 14:54:28 -0000 Received: by mail-vk0-f48.google.com with SMTP id i129so182030121vkb.0 for ; Sun, 17 Jan 2016 06:54:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=vSgBaeld1/SfLBg7teoLcd3oNbC0RV9JJizpbry6irI=; b=gPeB1jK5zFcJIGgIIqtWHux5BuDcJARjNFP7D47+uBGeSvFvcNOX6lTiKFvdKQ3vpz i1r1DeSjFh2tJIqXIwlUeSUujCy39R0VDgCzxBnmaPGlESNmLnAB/948iPOS2yH/nl1x /h3EWL3XjP7n4azHgKcszOgxWcnXR06WqJMzJFHRvlfUQKOhEcr+BhMwoYq4OLNiTR+C lu6kF8ZwurS/sDz5IBh232BeDO5eTaSKxSxqKXec1bDEtZ4I8gtV3z942+KAS68D3+qU QBVGF10kyP4LbP6PsxtRFzzsp+w+IBvhMJtbksjpF9zueay4AfsUR4O7f5oyBJ6zhaYQ sPCg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=vSgBaeld1/SfLBg7teoLcd3oNbC0RV9JJizpbry6irI=; b=czG9O+BroT+Yyc9BAHzESYMFROVrPJlzRSEaRwAEJhQzV5ZJrvZJ39DA/DFgfh0X4y B7DebItYTA16I9TYwnxZPMsHs13BeHo5j4Wqm1apHAt/r6jKWLoAQgt9QtBVb676FSm3 PHyjFDPQKyXm9fGK/mJUgZP9CdWeQO/te9tWGuGPRzliroggO3LbdfiQTfgcbBauCqWC rudVl0INZn/3G5Topj0wMqOBu81i5+LHD2FjnIjf5XZkTIOko1PO2+CQJDxLtc73VmAV dkBJcztZGmN/qKwEEyBei8yIWvzUc7TBoVtW+1IaW4YjlchF9v8mM7hhI1uHLrf4yiO1 q7cw== X-Gm-Message-State: ALoCoQnV4YhdUCevHC167V1xcywAtxCGP7FLc+xwc4+vNXW87fKQkpWg0YE5M2EMUpJ0YhQkIeg+oQHtOtp13pBb2FFFs+ChiA== MIME-Version: 1.0 X-Received: by 10.31.47.200 with SMTP id v191mr15104572vkv.116.1453042467200; Sun, 17 Jan 2016 06:54:27 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sun, 17 Jan 2016 06:54:27 -0800 (PST) In-Reply-To: <8800A03F-EB2A-418F-84C8-AA153305F720@recoil.org> References: <8800A03F-EB2A-418F-84C8-AA153305F720@recoil.org> Date: Sun, 17 Jan 2016 14:54:27 +0000 Message-ID: From: Thomas Leonard To: Anil Madhavapeddy Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Unmapping grants is unsafe X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 15 January 2016 at 16:15, Anil Madhavapeddy wrote: > >> On 4 Jan 2016, at 14:26, Thomas Leonard wrote: >> >> On 3 January 2016 at 10:38, Thomas Leonard wrote: >>> On 2 January 2016 at 14:35, Mindy wrote: >>>> On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >>>>> >>>>> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>>>>> >>>>>> I have a Mirage firewall running now under Qubes: >>>>>> >>>>>> >>>>>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ >> [...] >>>>>> - Mirage allows you to access memory after unmapping it. This isn't >>>>>> safe (may page-fault or give access to someone else's data). I've >>>>>> added checks in mirage-net-xen to make sure we don't try to access a >>>>>> ring after unmapping it [1], but I think this should be fixed at the >>>>>> Bigarray level [2]. >>>>>> >>>>> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >>>>> have a checkout handy here and it's hard to map a commit to the >>>>> associated PRs in the web UI. >>> >>> I haven't submitted a PR yet. Need to update it to master and test. >> >> https://github.com/ocaml/ocaml/pull/389 >> >> However, they're not keen on merging it, for performance reasons. >> Also, it would mean changing Cstruct, which currently says: >> >>> We try to maintain the property that no constructed [t] can ever point out of >>> its underlying buffer. This property is guarded by all of the constructing >>> functions and the fact that the type is private, and used by various >>> functions that would otherwise be completely unsafe. >> >> I wonder if we should instead change Gnt.Gnttab.Local_mapping.to_buf >> so that instead of returning an Io_page it returns something else, >> which provides similar operations but: >> >> a) checks every access to ensure it hasn't been unmapped, and >> b) doesn't allow you to get a Cstruct or Bigarray from it. >> >> However, this would mean a largish API change. > > Before going through the epic amount of work that an API change would make in upstream libraries, perhaps we should build a small unit test that rapidly does a simple data copy across domains and benchmark it? > > I think any new API should do very explicit lifetimes for the grant buffers (i.e. not depend on the GC to cleanup), but also minimise copying the data if at all possible. While it's dangerous to read from a shared memory buffer if you don't trust the other side, an enforced copy does make it hard to build efficient unikernel proxies that are just transferring data across shared rings. A simpler solution might be to rename [to_buf] to [to_buf_unsafe] and provide a safe [blit] operation (that fails if the buffer is no longer mapped). The block and net drivers already copy, so they could use the safe interface. shared-memory-ring currently reads directly, but maybe it shouldn't anyway (whether frontend or backend) to avoid TOCTOU issues. -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 17 15:03:32 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 17 Jan 2016 15:03:32 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKorZ-0005pe-HI; Sun, 17 Jan 2016 15:03:29 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKorW-0005pZ-KC for mirageos-devel@lists.xenproject.org; Sun, 17 Jan 2016 15:03:27 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id EB/1B-08977-D3DAB965; Sun, 17 Jan 2016 15:03:25 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-7.tower-21.messagelabs.com!1453043004!10662249!1 X-Originating-IP: [209.85.213.48] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 49452 invoked from network); 17 Jan 2016 15:03:25 -0000 Received: from mail-vk0-f48.google.com (HELO mail-vk0-f48.google.com) (209.85.213.48) by server-7.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Jan 2016 15:03:25 -0000 Received: by mail-vk0-f48.google.com with SMTP id i129so182087108vkb.0 for ; Sun, 17 Jan 2016 07:03:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=lEL+1ihVtBHOi6xe6a9Q+Zqfvg//fqe7CcWO+dcH3AQ=; b=Z8Udc/73CbEiAz6Hmxk1GcrncQ+mje9FmRZQLS9Z2SDOn3LLAWskZXnO7WLtqXb5kr o3lh66cGTZAJyWnkaqHKGTIg6df4JRnnA1FvM6CafIhv7Mbfs7ZK3N9gy1/iys+/9TKP O3hMbZf3ejnqii3dlWmOgp/S58miBfdHQm35O1xo7S0A0FeT8Da6PNr4/25VRZn37coT LyFA9ApUagml8LOVQDh/O5+hiyvTRbWUX8on2hSIe48WQAqFoX2LjYQgY4CKlsWxSeHD g37YveeZs/BO2RD0E3roGT7DmPYjIdEyxkyJb9xggiaHUTIpdpsRH1rnMyV/Ep3/ks4Y Nkig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=lEL+1ihVtBHOi6xe6a9Q+Zqfvg//fqe7CcWO+dcH3AQ=; b=bxUURorGJtDa5fGKUEhg1UHV8ejBkH3/yfP8RgK+u9BLUdFt6vIzVXjg/7zp4k9Wz4 BgHdocXiORBaAZPtjeadoWcSaBzQ0DzS9UNA9QVbcdDJsZNCZ2VLstD2pwhR5Iiqnevr jY638Alu5lkVceGSibsm5rlQoq7jPQMCMY5Ljb8aXVZ+dYel5zXpOrbaK068/xD3oQAl u67VJNmOmAw/tY9g36hZom16vh/wvcPk9mUJeUDSpF2037uCDnp8j50i9o1NQcOIv3qV esykyX8z3H3GV+X4KQ6zaPiwmceh465uLyluGo5DnkhSJ63HjyAePZyPqjNOOm3D3ft1 YRaQ== X-Gm-Message-State: ALoCoQkMfbF/zzV4ahhgHvqQGrIbz0F3VbNKnMn5j+sSzkbLKYv8+lXN0oYOylbyNwNr8fAVRvN5UNBedEaAeppIHrMtT9/e+A== MIME-Version: 1.0 X-Received: by 10.31.178.134 with SMTP id b128mr13034681vkf.112.1453043004369; Sun, 17 Jan 2016 07:03:24 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sun, 17 Jan 2016 07:03:24 -0800 (PST) In-Reply-To: References: Date: Sun, 17 Jan 2016 15:03:24 +0000 Message-ID: From: Thomas Leonard To: Vasilis Goumas Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] beginner contributing to mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 16 January 2016 at 21:19, Vasilis Goumas wrote: > Hello Thomas, > > After your helpful reply in my previous mail, I took the initiative to pm > you. > Also I wasn't sure If the mail was suitable for the list so forward if > necessary. Yes, please keep all discussion on the list. >> By the way, I'm not sure these star ratings are very accurate. This is >> a 1-star project, but it looks quite hard to me! Are you familiar with >> the Git protocol? If not, learning that and OCaml at the same time >> might be tricky. > > > I am not familiar with the git protocol internals, so I guess that one might > not be > the best beginner project. > >> If anyone wants some really easy (but useful!) getting started tasks, >> I've added a pioneer project to find libraries using printf and update >> them to use Logs: >> https://github.com/mirage/mirage-www/wiki/Pioneer-Projects#logging > > > The task you mentioned seems interesting and I would like to start working > on it. > Any tips for the development workflow or must-study stuff, to get acquainted > with > the project? You could start by cloning the mirage-skeleton repository and making a new example based on "console" that uses logging rather than printing. For modifying libraries, you'll need to know how to "opam pin" a modified package for testing. There's some useful information here: https://www.somerandomidiot.com/blog/2015/11/26/quick-changes-in-mirageos/ (however, I find it easier to look in the Makefile to find the dependencies, rather than reading the source of the mirage tool, and make sure you do "opam pin -k git" to pin in "mixed mode", or you'll have endless trouble with stale OASIS files) -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Sun Jan 17 15:03:32 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 17 Jan 2016 15:03:32 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKorZ-0005pe-HI; Sun, 17 Jan 2016 15:03:29 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aKorW-0005pZ-KC for mirageos-devel@lists.xenproject.org; Sun, 17 Jan 2016 15:03:27 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id EB/1B-08977-D3DAB965; Sun, 17 Jan 2016 15:03:25 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-7.tower-21.messagelabs.com!1453043004!10662249!1 X-Originating-IP: [209.85.213.48] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 49452 invoked from network); 17 Jan 2016 15:03:25 -0000 Received: from mail-vk0-f48.google.com (HELO mail-vk0-f48.google.com) (209.85.213.48) by server-7.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Jan 2016 15:03:25 -0000 Received: by mail-vk0-f48.google.com with SMTP id i129so182087108vkb.0 for ; Sun, 17 Jan 2016 07:03:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=lEL+1ihVtBHOi6xe6a9Q+Zqfvg//fqe7CcWO+dcH3AQ=; b=Z8Udc/73CbEiAz6Hmxk1GcrncQ+mje9FmRZQLS9Z2SDOn3LLAWskZXnO7WLtqXb5kr o3lh66cGTZAJyWnkaqHKGTIg6df4JRnnA1FvM6CafIhv7Mbfs7ZK3N9gy1/iys+/9TKP O3hMbZf3ejnqii3dlWmOgp/S58miBfdHQm35O1xo7S0A0FeT8Da6PNr4/25VRZn37coT LyFA9ApUagml8LOVQDh/O5+hiyvTRbWUX8on2hSIe48WQAqFoX2LjYQgY4CKlsWxSeHD g37YveeZs/BO2RD0E3roGT7DmPYjIdEyxkyJb9xggiaHUTIpdpsRH1rnMyV/Ep3/ks4Y Nkig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=lEL+1ihVtBHOi6xe6a9Q+Zqfvg//fqe7CcWO+dcH3AQ=; b=bxUURorGJtDa5fGKUEhg1UHV8ejBkH3/yfP8RgK+u9BLUdFt6vIzVXjg/7zp4k9Wz4 BgHdocXiORBaAZPtjeadoWcSaBzQ0DzS9UNA9QVbcdDJsZNCZ2VLstD2pwhR5Iiqnevr jY638Alu5lkVceGSibsm5rlQoq7jPQMCMY5Ljb8aXVZ+dYel5zXpOrbaK068/xD3oQAl u67VJNmOmAw/tY9g36hZom16vh/wvcPk9mUJeUDSpF2037uCDnp8j50i9o1NQcOIv3qV esykyX8z3H3GV+X4KQ6zaPiwmceh465uLyluGo5DnkhSJ63HjyAePZyPqjNOOm3D3ft1 YRaQ== X-Gm-Message-State: ALoCoQkMfbF/zzV4ahhgHvqQGrIbz0F3VbNKnMn5j+sSzkbLKYv8+lXN0oYOylbyNwNr8fAVRvN5UNBedEaAeppIHrMtT9/e+A== MIME-Version: 1.0 X-Received: by 10.31.178.134 with SMTP id b128mr13034681vkf.112.1453043004369; Sun, 17 Jan 2016 07:03:24 -0800 (PST) Received: by 10.31.128.84 with HTTP; Sun, 17 Jan 2016 07:03:24 -0800 (PST) In-Reply-To: References: Date: Sun, 17 Jan 2016 15:03:24 +0000 Message-ID: From: Thomas Leonard To: Vasilis Goumas Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] beginner contributing to mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 16 January 2016 at 21:19, Vasilis Goumas wrote: > Hello Thomas, > > After your helpful reply in my previous mail, I took the initiative to pm > you. > Also I wasn't sure If the mail was suitable for the list so forward if > necessary. Yes, please keep all discussion on the list. >> By the way, I'm not sure these star ratings are very accurate. This is >> a 1-star project, but it looks quite hard to me! Are you familiar with >> the Git protocol? If not, learning that and OCaml at the same time >> might be tricky. > > > I am not familiar with the git protocol internals, so I guess that one might > not be > the best beginner project. > >> If anyone wants some really easy (but useful!) getting started tasks, >> I've added a pioneer project to find libraries using printf and update >> them to use Logs: >> https://github.com/mirage/mirage-www/wiki/Pioneer-Projects#logging > > > The task you mentioned seems interesting and I would like to start working > on it. > Any tips for the development workflow or must-study stuff, to get acquainted > with > the project? You could start by cloning the mirage-skeleton repository and making a new example based on "console" that uses logging rather than printing. For modifying libraries, you'll need to know how to "opam pin" a modified package for testing. There's some useful information here: https://www.somerandomidiot.com/blog/2015/11/26/quick-changes-in-mirageos/ (however, I find it easier to look in the Makefile to find the dependencies, rather than reading the source of the mirage tool, and make sure you do "opam pin -k git" to pin in "mixed mode", or you'll have endless trouble with stale OASIS files) -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 18 14:16:27 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 18 Jan 2016 14:16:27 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLAbT-0000yq-90; Mon, 18 Jan 2016 14:16:19 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLAbR-0000yj-On for mirageos-devel@lists.xenproject.org; Mon, 18 Jan 2016 14:16:17 +0000 Received: from [193.109.254.147] by server-8.bemta-14.messagelabs.com id 9F/7C-24450-1B3FC965; Mon, 18 Jan 2016 14:16:17 +0000 X-Env-Sender: hannes@mehnert.org X-Msg-Ref: server-4.tower-27.messagelabs.com!1453126576!16675609!1 X-Originating-IP: [213.73.89.200] X-SpamReason: No, hits=0.3 required=7.0 tests=MAILTO_TO_SPAM_ADDR X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 41808 invoked from network); 18 Jan 2016 14:16:16 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-4.tower-27.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 18 Jan 2016 14:16:16 -0000 Received: from [128.232.110.198] (c198.al.cl.cam.ac.uk [128.232.110.198]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 92DA41EC5 for ; Mon, 18 Jan 2016 15:16:14 +0100 (CET) To: "mirageos-devel@lists.xenproject.org" From: Hannes Mehnert Openpgp: id=11B5464249B5BD858FFF6328BC896588DF7C28EE X-Enigmail-Draft-Status: N1210 Message-ID: <569CF3A3.9070007@mehnert.org> Date: Mon, 18 Jan 2016 14:16:03 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 Subject: [MirageOS-devel] reminder: MirageOS hackathon - March 11th - 16th -- please register X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6971911191824134464==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============6971911191824134464== Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="xxnk1RH3LUuFGTD82Ta3KmSenJPDGRxGe" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --xxnk1RH3LUuFGTD82Ta3KmSenJPDGRxGe Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hey, please register for the MirageOS hackathon if you plan attending by sending a mail to marrakech2016@mirage.io (everybody [so far 16 individuals] who registered received a confirmation mail last Thursday). Everybody is welcome (no need to be an OCaml/MirageOS expert), as long as you share interest in advancing MirageOS. More information at http://marrakech2016.mirage.io Spread the word and see you there, hannes --xxnk1RH3LUuFGTD82Ta3KmSenJPDGRxGe Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCQAGBQJWnPOoAAoJELyJZYjffCjudcgP/RUE+2mQhdVd21Ega2f49R9l bRr3ru3xi41NmdjErHi653bZSdKBe3DXs+4DaY+4fVkXHifoE6rn+oiexEnJ/fgV KHRKw+9uJ/GyggC12yJEZ1bkFr6SaRWDja5rP/e0h/nlJzlkIBc0w/N9E288qLon 7YmMLK6r/zdydi3NQiCAf7HmDlAzVKhXoUaRGfEZhNh7fSEHFkkOrNas6DLU5NMw o5jbJ0hoBXP4qaeNAp2wyWIaKI7Tq8F/+rAjXbzjEangn2fDOiiLoyVm4A/9Cu+p WREo9o9ZYZXXfYOccHxVRxVxExHOtN/rpmYbXJpe19eReWsU7JzrTann5Rlt/px2 jBCnAoa9biabymI6iFKxz2ZKnB7RMLWYeIK48D6BQtTEIYqBJWAxRQMakBDYBAZJ f+HujtKhOW2ZWbfpLFRNri8+Jm9gcY3SG7xqJXg0nP9Q7LfIcYY7yeIzzMBKwmzw Lmx8qaMZzOg/w2JN7c52eb6MvzIvH2k4bPUfLjOXP3O8APY5pryluzM+1Kvor0Dw z/iEq3hF5ploALt3XNBE7ykin+GmKlTea7zA3qsgMHLqnQbDSJc57UAGK6GGk8jW j8+/ysdrvlGJjhREf//WP4CTl32tCbJPkBtDsyIOsvNyf/iUGl7V0iIXZvGQngE8 UcE2j0Pgu/8jmOcYxRlK =Fh/i -----END PGP SIGNATURE----- --xxnk1RH3LUuFGTD82Ta3KmSenJPDGRxGe-- --===============6971911191824134464== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============6971911191824134464==-- From mirageos-devel-bounces@lists.xenproject.org Mon Jan 18 14:16:27 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 18 Jan 2016 14:16:27 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLAbT-0000yq-90; Mon, 18 Jan 2016 14:16:19 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLAbR-0000yj-On for mirageos-devel@lists.xenproject.org; Mon, 18 Jan 2016 14:16:17 +0000 Received: from [193.109.254.147] by server-8.bemta-14.messagelabs.com id 9F/7C-24450-1B3FC965; Mon, 18 Jan 2016 14:16:17 +0000 X-Env-Sender: hannes@mehnert.org X-Msg-Ref: server-4.tower-27.messagelabs.com!1453126576!16675609!1 X-Originating-IP: [213.73.89.200] X-SpamReason: No, hits=0.3 required=7.0 tests=MAILTO_TO_SPAM_ADDR X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 41808 invoked from network); 18 Jan 2016 14:16:16 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-4.tower-27.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 18 Jan 2016 14:16:16 -0000 Received: from [128.232.110.198] (c198.al.cl.cam.ac.uk [128.232.110.198]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 92DA41EC5 for ; Mon, 18 Jan 2016 15:16:14 +0100 (CET) To: "mirageos-devel@lists.xenproject.org" From: Hannes Mehnert Openpgp: id=11B5464249B5BD858FFF6328BC896588DF7C28EE X-Enigmail-Draft-Status: N1210 Message-ID: <569CF3A3.9070007@mehnert.org> Date: Mon, 18 Jan 2016 14:16:03 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 Subject: [MirageOS-devel] reminder: MirageOS hackathon - March 11th - 16th -- please register X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6971911191824134464==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============6971911191824134464== Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="xxnk1RH3LUuFGTD82Ta3KmSenJPDGRxGe" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --xxnk1RH3LUuFGTD82Ta3KmSenJPDGRxGe Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hey, please register for the MirageOS hackathon if you plan attending by sending a mail to marrakech2016@mirage.io (everybody [so far 16 individuals] who registered received a confirmation mail last Thursday). Everybody is welcome (no need to be an OCaml/MirageOS expert), as long as you share interest in advancing MirageOS. More information at http://marrakech2016.mirage.io Spread the word and see you there, hannes --xxnk1RH3LUuFGTD82Ta3KmSenJPDGRxGe Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCQAGBQJWnPOoAAoJELyJZYjffCjudcgP/RUE+2mQhdVd21Ega2f49R9l bRr3ru3xi41NmdjErHi653bZSdKBe3DXs+4DaY+4fVkXHifoE6rn+oiexEnJ/fgV KHRKw+9uJ/GyggC12yJEZ1bkFr6SaRWDja5rP/e0h/nlJzlkIBc0w/N9E288qLon 7YmMLK6r/zdydi3NQiCAf7HmDlAzVKhXoUaRGfEZhNh7fSEHFkkOrNas6DLU5NMw o5jbJ0hoBXP4qaeNAp2wyWIaKI7Tq8F/+rAjXbzjEangn2fDOiiLoyVm4A/9Cu+p WREo9o9ZYZXXfYOccHxVRxVxExHOtN/rpmYbXJpe19eReWsU7JzrTann5Rlt/px2 jBCnAoa9biabymI6iFKxz2ZKnB7RMLWYeIK48D6BQtTEIYqBJWAxRQMakBDYBAZJ f+HujtKhOW2ZWbfpLFRNri8+Jm9gcY3SG7xqJXg0nP9Q7LfIcYY7yeIzzMBKwmzw Lmx8qaMZzOg/w2JN7c52eb6MvzIvH2k4bPUfLjOXP3O8APY5pryluzM+1Kvor0Dw z/iEq3hF5ploALt3XNBE7ykin+GmKlTea7zA3qsgMHLqnQbDSJc57UAGK6GGk8jW j8+/ysdrvlGJjhREf//WP4CTl32tCbJPkBtDsyIOsvNyf/iUGl7V0iIXZvGQngE8 UcE2j0Pgu/8jmOcYxRlK =Fh/i -----END PGP SIGNATURE----- --xxnk1RH3LUuFGTD82Ta3KmSenJPDGRxGe-- --===============6971911191824134464== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============6971911191824134464==-- From mirageos-devel-bounces@lists.xenproject.org Mon Jan 18 20:13:29 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 18 Jan 2016 20:13:29 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLGAz-00014K-Cl; Mon, 18 Jan 2016 20:13:21 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLGAx-00014F-TN for mirageos-devel@lists.xenproject.org; Mon, 18 Jan 2016 20:13:20 +0000 Received: from [85.158.139.211] by server-13.bemta-5.messagelabs.com id 17/61-06091-F574D965; Mon, 18 Jan 2016 20:13:19 +0000 X-Env-Sender: thomas.gazagnaire@gmail.com X-Msg-Ref: server-7.tower-206.messagelabs.com!1453147998!16346042!1 X-Originating-IP: [74.125.82.43] X-SpamReason: No, hits=0.3 required=7.0 tests=MAILTO_TO_SPAM_ADDR X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 14241 invoked from network); 18 Jan 2016 20:13:18 -0000 Received: from mail-wm0-f43.google.com (HELO mail-wm0-f43.google.com) (74.125.82.43) by server-7.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 18 Jan 2016 20:13:18 -0000 Received: by mail-wm0-f43.google.com with SMTP id u188so117843927wmu.1 for ; Mon, 18 Jan 2016 12:13:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=oKXiolG+JO2zQlgWHMZpAmR55uSYsyBSknt2sBKsw34=; b=xqF/cZgswpc5+dseWj6ZevXtWIsloksbeciiPkrbpPb7x/zHZRbCXks6ZolEVjXA7r eWUnMM/WJJBW1+avigtFwmuYW/+2ZouLrJLbcveFHUxsxJei9bbBhvQUFVFCS7+T3jHU DJdgmuOr2ypYaP7v14CfrFVWxceEwGY2L/YqKvXmpQDQOa3Ak0Z2udgnHJJit9elPcXs 67oqmnl0F+jdXtaqMdxwz86Ium2xoEOZCtiu63EO3vSNoj8RIw5tYMKhVTjNZ+78IHV7 nr2ESCa0uERuePGqRUoVK+lxmY+P3ho7EvLqJuAP2IqwRxT1g7QUxnUjsxiDJueNgOk9 dDNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=oKXiolG+JO2zQlgWHMZpAmR55uSYsyBSknt2sBKsw34=; b=LP2BgC4egSgH2YJ1fAimUk7cU8fjXDfsyE0JVV+zFoQZ+ZU0dADq7YjMuLAYlMdwaj 6CimGCm4cN6hpcjD1WjIYkSbYSScxYn6QDheLMKx+7YxPPfbHK41F9HFP1SawV34h2g2 tpDvjSFSZb9O/K6+YQKtq0kb2JQ3pkvGY6O9Pw3FyuMoOE/LnZAV31z/mgLlfeI53L7o voeob51U1uHf/nAd5FSPgrgLqFDUpqIPKLzPoCsMzyYumRN6q6DEXqj97QMIVWEWT4iH FH42Tg8Sfg98nVFtvCI+MBMKT6QuyyKYGDzJ5fhZL9EEoeSCyYkOdN01Fn6W5sdkBlRc kjBA== X-Gm-Message-State: AG10YOR8iUnoKQfhEf9AGk4f/XCwlS7TrlC1asSh0qS19Ztl01YINb7IIiFITlZh25ughA== X-Received: by 10.194.79.73 with SMTP id h9mr2987951wjx.12.1453147997780; Mon, 18 Jan 2016 12:13:17 -0800 (PST) Received: from [192.168.0.2] (cpc91206-cmbg18-2-0-cust57.5-4.cable.virginm.net. [81.101.26.58]) by smtp.gmail.com with ESMTPSA id c26sm17287860wmi.21.2016.01.18.12.13.16 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 18 Jan 2016 12:13:16 -0800 (PST) Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Thomas Gazagnaire In-Reply-To: <663e4a04546e2d509c45d83fab5e99b9@cam.ac.uk> Date: Mon, 18 Jan 2016 20:13:16 +0000 Message-Id: <66FED347-B7C6-4A73-8641-88B61418E150@gazagnaire.org> References: <6CCAF6CF-BC3D-4C2C-99A3-0435C61D16D4@cam.ac.uk> <663e4a04546e2d509c45d83fab5e99b9@cam.ac.uk> To: Nik Sultana X-Mailer: Apple Mail (2.2104) Cc: Rupert Horlick , mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Irmin on BLOCK X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Seems that Dave has been busy: https://github.com/djs55/ocaml-btree (sorry Dave if I spoiled your future announcement) Thomas > On 11 Nov 2015, at 15:28, Nik Sultana wrote: > > Coincidentally B-trees came up recently on Ocaml-list: > https://sympa.inria.fr/sympa/arc/caml-list/2015-11/msg00011.html > > > On 2015-11-11 09:58, Rupert Horlick wrote: >> Hmm, it seems like that is built on top of a few packages that don't >> exist any more to interface between Baardskeerder and Mirage. >> Do you think it's worth doing a simple B-Tree implementation myself, >> or would it be better to try and build a new interface module for >> Mirage and Baardskeerder? >> A B-Tree implementation would certainly be good for the project >> write-up, but let me know what you think. >> Rupert >> On Tue, Nov 10, 2015 at 8:58 PM Richard Mortier >> wrote: >>> On 10 November 2015 at 16:49, Rupert Horlick >>> wrote: >>>> I'm implementing this for a Part II project, so I've decided to >>> go ahead and >>>> implement my own simple FS for BLOCK, rather than using IRMIN. >>>> However, I'm coming across the difficulties that Dave mentioned, >>> Simple and in-memory is (surely!) still good to start with though! >>>> so I'm >>>> reading up on B-trees as we speak. I may well end up writing a >>> simple B-tree >>>> library, so I'll let know you if I do. >>> There may be most of such a thing already I think -- Chris >>> Greenhalgh >>> at Nottingham lashed something up a while ago based on >>> Baardskeerder, >>> see https://github.com/cgreenhalgh/ocaml-btree [1] (though based on >>> a much >>> much earlier version of Mirage :) >>> -- >>> Richard Mortier >>> richard.mortier@cl.cam.ac.uk >> Links: >> ------ >> [1] https://github.com/cgreenhalgh/ocaml-btree >> _______________________________________________ >> MirageOS-devel mailing list >> MirageOS-devel@lists.xenproject.org >> http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 18 20:13:29 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 18 Jan 2016 20:13:29 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLGAz-00014K-Cl; Mon, 18 Jan 2016 20:13:21 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLGAx-00014F-TN for mirageos-devel@lists.xenproject.org; Mon, 18 Jan 2016 20:13:20 +0000 Received: from [85.158.139.211] by server-13.bemta-5.messagelabs.com id 17/61-06091-F574D965; Mon, 18 Jan 2016 20:13:19 +0000 X-Env-Sender: thomas.gazagnaire@gmail.com X-Msg-Ref: server-7.tower-206.messagelabs.com!1453147998!16346042!1 X-Originating-IP: [74.125.82.43] X-SpamReason: No, hits=0.3 required=7.0 tests=MAILTO_TO_SPAM_ADDR X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 14241 invoked from network); 18 Jan 2016 20:13:18 -0000 Received: from mail-wm0-f43.google.com (HELO mail-wm0-f43.google.com) (74.125.82.43) by server-7.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 18 Jan 2016 20:13:18 -0000 Received: by mail-wm0-f43.google.com with SMTP id u188so117843927wmu.1 for ; Mon, 18 Jan 2016 12:13:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=oKXiolG+JO2zQlgWHMZpAmR55uSYsyBSknt2sBKsw34=; b=xqF/cZgswpc5+dseWj6ZevXtWIsloksbeciiPkrbpPb7x/zHZRbCXks6ZolEVjXA7r eWUnMM/WJJBW1+avigtFwmuYW/+2ZouLrJLbcveFHUxsxJei9bbBhvQUFVFCS7+T3jHU DJdgmuOr2ypYaP7v14CfrFVWxceEwGY2L/YqKvXmpQDQOa3Ak0Z2udgnHJJit9elPcXs 67oqmnl0F+jdXtaqMdxwz86Ium2xoEOZCtiu63EO3vSNoj8RIw5tYMKhVTjNZ+78IHV7 nr2ESCa0uERuePGqRUoVK+lxmY+P3ho7EvLqJuAP2IqwRxT1g7QUxnUjsxiDJueNgOk9 dDNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=oKXiolG+JO2zQlgWHMZpAmR55uSYsyBSknt2sBKsw34=; b=LP2BgC4egSgH2YJ1fAimUk7cU8fjXDfsyE0JVV+zFoQZ+ZU0dADq7YjMuLAYlMdwaj 6CimGCm4cN6hpcjD1WjIYkSbYSScxYn6QDheLMKx+7YxPPfbHK41F9HFP1SawV34h2g2 tpDvjSFSZb9O/K6+YQKtq0kb2JQ3pkvGY6O9Pw3FyuMoOE/LnZAV31z/mgLlfeI53L7o voeob51U1uHf/nAd5FSPgrgLqFDUpqIPKLzPoCsMzyYumRN6q6DEXqj97QMIVWEWT4iH FH42Tg8Sfg98nVFtvCI+MBMKT6QuyyKYGDzJ5fhZL9EEoeSCyYkOdN01Fn6W5sdkBlRc kjBA== X-Gm-Message-State: AG10YOR8iUnoKQfhEf9AGk4f/XCwlS7TrlC1asSh0qS19Ztl01YINb7IIiFITlZh25ughA== X-Received: by 10.194.79.73 with SMTP id h9mr2987951wjx.12.1453147997780; Mon, 18 Jan 2016 12:13:17 -0800 (PST) Received: from [192.168.0.2] (cpc91206-cmbg18-2-0-cust57.5-4.cable.virginm.net. [81.101.26.58]) by smtp.gmail.com with ESMTPSA id c26sm17287860wmi.21.2016.01.18.12.13.16 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 18 Jan 2016 12:13:16 -0800 (PST) Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Thomas Gazagnaire In-Reply-To: <663e4a04546e2d509c45d83fab5e99b9@cam.ac.uk> Date: Mon, 18 Jan 2016 20:13:16 +0000 Message-Id: <66FED347-B7C6-4A73-8641-88B61418E150@gazagnaire.org> References: <6CCAF6CF-BC3D-4C2C-99A3-0435C61D16D4@cam.ac.uk> <663e4a04546e2d509c45d83fab5e99b9@cam.ac.uk> To: Nik Sultana X-Mailer: Apple Mail (2.2104) Cc: Rupert Horlick , mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Irmin on BLOCK X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Seems that Dave has been busy: https://github.com/djs55/ocaml-btree (sorry Dave if I spoiled your future announcement) Thomas > On 11 Nov 2015, at 15:28, Nik Sultana wrote: > > Coincidentally B-trees came up recently on Ocaml-list: > https://sympa.inria.fr/sympa/arc/caml-list/2015-11/msg00011.html > > > On 2015-11-11 09:58, Rupert Horlick wrote: >> Hmm, it seems like that is built on top of a few packages that don't >> exist any more to interface between Baardskeerder and Mirage. >> Do you think it's worth doing a simple B-Tree implementation myself, >> or would it be better to try and build a new interface module for >> Mirage and Baardskeerder? >> A B-Tree implementation would certainly be good for the project >> write-up, but let me know what you think. >> Rupert >> On Tue, Nov 10, 2015 at 8:58 PM Richard Mortier >> wrote: >>> On 10 November 2015 at 16:49, Rupert Horlick >>> wrote: >>>> I'm implementing this for a Part II project, so I've decided to >>> go ahead and >>>> implement my own simple FS for BLOCK, rather than using IRMIN. >>>> However, I'm coming across the difficulties that Dave mentioned, >>> Simple and in-memory is (surely!) still good to start with though! >>>> so I'm >>>> reading up on B-trees as we speak. I may well end up writing a >>> simple B-tree >>>> library, so I'll let know you if I do. >>> There may be most of such a thing already I think -- Chris >>> Greenhalgh >>> at Nottingham lashed something up a while ago based on >>> Baardskeerder, >>> see https://github.com/cgreenhalgh/ocaml-btree [1] (though based on >>> a much >>> much earlier version of Mirage :) >>> -- >>> Richard Mortier >>> richard.mortier@cl.cam.ac.uk >> Links: >> ------ >> [1] https://github.com/cgreenhalgh/ocaml-btree >> _______________________________________________ >> MirageOS-devel mailing list >> MirageOS-devel@lists.xenproject.org >> http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 18 20:22:24 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 18 Jan 2016 20:22:24 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLGJk-0001S1-9A; Mon, 18 Jan 2016 20:22:24 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLGJi-0001Rw-Ja for mirageos-devel@lists.xenproject.org; Mon, 18 Jan 2016 20:22:22 +0000 Received: from [85.158.139.211] by server-12.bemta-5.messagelabs.com id 2C/1B-17089-D794D965; Mon, 18 Jan 2016 20:22:21 +0000 X-Env-Sender: scott.dj@gmail.com X-Msg-Ref: server-11.tower-206.messagelabs.com!1453148539!16603569!1 X-Originating-IP: [74.125.82.52] X-SpamReason: No, hits=1.2 required=7.0 tests=HTML_40_50,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 46733 invoked from network); 18 Jan 2016 20:22:19 -0000 Received: from mail-wm0-f52.google.com (HELO mail-wm0-f52.google.com) (74.125.82.52) by server-11.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 18 Jan 2016 20:22:19 -0000 Received: by mail-wm0-f52.google.com with SMTP id r129so65331367wmr.0 for ; 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Mon, 18 Jan 2016 12:22:19 -0800 (PST) Received: by 10.28.137.2 with HTTP; Mon, 18 Jan 2016 12:22:19 -0800 (PST) In-Reply-To: <66FED347-B7C6-4A73-8641-88B61418E150@gazagnaire.org> References: <6CCAF6CF-BC3D-4C2C-99A3-0435C61D16D4@cam.ac.uk> <663e4a04546e2d509c45d83fab5e99b9@cam.ac.uk> <66FED347-B7C6-4A73-8641-88B61418E150@gazagnaire.org> Date: Mon, 18 Jan 2016 20:22:19 +0000 Message-ID: From: David Scott To: Thomas Gazagnaire Cc: Rupert Horlick , "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Irmin on BLOCK X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6462077409794705937==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============6462077409794705937== Content-Type: multipart/alternative; boundary=089e014935f480b8fd0529a18291 --089e014935f480b8fd0529a18291 Content-Type: text/plain; charset=UTF-8 On Mon, Jan 18, 2016 at 8:13 PM, Thomas Gazagnaire wrote: > Seems that Dave has been busy: > > https://github.com/djs55/ocaml-btree > > (sorry Dave if I spoiled your future announcement) > That's ok -- I'm still experimenting with interfaces and disk layouts. It'll be a while before I have anything that works! Most of the interesting function bodies are still `failwith "unimplemented: ..."` and I've not thought enough about how the GC would work. Cheers, Dave > > Thomas > > > > On 11 Nov 2015, at 15:28, Nik Sultana wrote: > > > > Coincidentally B-trees came up recently on Ocaml-list: > > https://sympa.inria.fr/sympa/arc/caml-list/2015-11/msg00011.html > > > > > > On 2015-11-11 09:58, Rupert Horlick wrote: > >> Hmm, it seems like that is built on top of a few packages that don't > >> exist any more to interface between Baardskeerder and Mirage. > >> Do you think it's worth doing a simple B-Tree implementation myself, > >> or would it be better to try and build a new interface module for > >> Mirage and Baardskeerder? > >> A B-Tree implementation would certainly be good for the project > >> write-up, but let me know what you think. > >> Rupert > >> On Tue, Nov 10, 2015 at 8:58 PM Richard Mortier > >> wrote: > >>> On 10 November 2015 at 16:49, Rupert Horlick > >>> wrote: > >>>> I'm implementing this for a Part II project, so I've decided to > >>> go ahead and > >>>> implement my own simple FS for BLOCK, rather than using IRMIN. > >>>> However, I'm coming across the difficulties that Dave mentioned, > >>> Simple and in-memory is (surely!) still good to start with though! > >>>> so I'm > >>>> reading up on B-trees as we speak. I may well end up writing a > >>> simple B-tree > >>>> library, so I'll let know you if I do. > >>> There may be most of such a thing already I think -- Chris > >>> Greenhalgh > >>> at Nottingham lashed something up a while ago based on > >>> Baardskeerder, > >>> see https://github.com/cgreenhalgh/ocaml-btree [1] (though based on > >>> a much > >>> much earlier version of Mirage :) > >>> -- > >>> Richard Mortier > >>> richard.mortier@cl.cam.ac.uk > >> Links: > >> ------ > >> [1] https://github.com/cgreenhalgh/ocaml-btree > >> _______________________________________________ > >> MirageOS-devel mailing list > >> MirageOS-devel@lists.xenproject.org > >> http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > > > > _______________________________________________ > > MirageOS-devel mailing list > > MirageOS-devel@lists.xenproject.org > > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --089e014935f480b8fd0529a18291 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Mon, Jan 18, 2016 at 8:13 PM, Thomas Gazagnaire &l= t;thomas@gazagna= ire.org> wrote:
Seems that = Dave has been busy:

https://github.com/djs55/ocaml-btree

(sorry Dave if I spoiled your future announcement)
That's ok -- I'm still experimenting with interfaces an= d disk layouts. It'll be a while before I have anything that works! Mos= t of the interesting function bodies are still `failwith "unimplemente= d: ..."` and I've not thought enough about how the GC would work.<= /div>

Cheers,
Dave

= =C2=A0

Thomas


> On 11 Nov 2015, at 15:28, Nik Sultana <ns441@cam.ac.uk> wrote:
>
> Coincidentally B-trees came up recently on Ocaml-list:
>=C2=A0 https://sympa.inria.fr/sy= mpa/arc/caml-list/2015-11/msg00011.html
>
>
> On 2015-11-11 09:58, Rupert Horlick wrote:
>> Hmm, it seems like that is built on top of a few packages that don= 't
>> exist any more to interface between Baardskeerder and Mirage.
>> Do you think it's worth doing a simple B-Tree implementation m= yself,
>> or would it be better to try and build a new interface module for<= br> >> Mirage and Baardskeerder?
>> A B-Tree implementation would certainly be good for the project >> write-up, but let me know what you think.
>> Rupert
>> On Tue, Nov 10, 2015 at 8:58 PM Richard Mortier
>> <richard.mortie= r@cl.cam.ac.uk> wrote:
>>> On 10 November 2015 at 16:49, Rupert Horlick <rh572@cam.ac.uk>
>>> wrote:
>>>> I'm implementing this for a Part II project, so I'= ve decided to
>>> go ahead and
>>>> implement my own simple FS for BLOCK, rather than using IR= MIN.
>>>> However, I'm coming across the difficulties that Dave = mentioned,
>>> Simple and in-memory is (surely!) still good to start with tho= ugh!
>>>> so I'm
>>>> reading up on B-trees as we speak. I may well end up writi= ng a
>>> simple B-tree
>>>> library, so I'll let know you if I do.
>>> There may be most of such a thing already I think -- Chris
>>> Greenhalgh
>>> at Nottingham lashed something up a while ago based on
>>> Baardskeerder,
>>> see https://github.com/cgreenhalgh/ocaml-btre= e [1] (though based on
>>> a much
>>> much earlier version of Mirage :)
>>> --
>>> Richard Mortier
>>> richard.mortie= r@cl.cam.ac.uk
>> Links:
>> ------
>> [1] https://github.com/cgreenhalgh/ocaml-btree
>> _______________________________________________
>> MirageOS-devel mailing list
>> MirageOS-de= vel@lists.xenproject.org
>> http://lists.xenproject.= org/cgi-bin/mailman/listinfo/mirageos-devel
>
> _______________________________________________
> MirageOS-devel mailing list
> MirageOS-devel@= lists.xenproject.org
> http://lists.xenproject.org/= cgi-bin/mailman/listinfo/mirageos-devel


_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
http://lists.xenproject.org/cgi-b= in/mailman/listinfo/mirageos-devel



--
=
Dave Scott
--089e014935f480b8fd0529a18291-- --===============6462077409794705937== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============6462077409794705937==-- From mirageos-devel-bounces@lists.xenproject.org Mon Jan 18 20:22:24 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 18 Jan 2016 20:22:24 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLGJk-0001S1-9A; Mon, 18 Jan 2016 20:22:24 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLGJi-0001Rw-Ja for mirageos-devel@lists.xenproject.org; Mon, 18 Jan 2016 20:22:22 +0000 Received: from [85.158.139.211] by server-12.bemta-5.messagelabs.com id 2C/1B-17089-D794D965; Mon, 18 Jan 2016 20:22:21 +0000 X-Env-Sender: scott.dj@gmail.com X-Msg-Ref: server-11.tower-206.messagelabs.com!1453148539!16603569!1 X-Originating-IP: [74.125.82.52] X-SpamReason: No, hits=1.2 required=7.0 tests=HTML_40_50,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 46733 invoked from network); 18 Jan 2016 20:22:19 -0000 Received: from mail-wm0-f52.google.com (HELO mail-wm0-f52.google.com) (74.125.82.52) by server-11.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 18 Jan 2016 20:22:19 -0000 Received: by mail-wm0-f52.google.com with SMTP id r129so65331367wmr.0 for ; Mon, 18 Jan 2016 12:22:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=IDwOnoKQXm7JA+es+wDCpJsE7Y7UMatn+Uj796XJ5pA=; b=MDt4o00rxjlbICU+OT87d21Ppb50+azSZYSHXM+dcoq2NqxicwFUDqSBYao8qcmiZ7 FI5WNj6woIBKoZ5dAbDA97CYUKX4PnOQbEsGe1nU/cwH6wA59cmABI8w8486XcvN02PA Pdz/BiSxY4Q64K+D+D5xpl4ia8TMxxUxmUifx2xyCDXmKCMfNeemNhkyjOo5TAhm6SnW kow0UTuur3DaRFhas+kP0L+8YUlBOqSV1JM9uKwlGDD7LKQ09/QM5jL0ClEsSbW+DtOI 2SmicMRDEgJpXI/7VhQON9wFwwgLfKg9ibFEkpgS08By7JHGMY+zfBhxtfTy+AzRL42x 52cg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=IDwOnoKQXm7JA+es+wDCpJsE7Y7UMatn+Uj796XJ5pA=; b=OruzvYc6U6MVh2/lpIUW8oKwma1ZN6rphhgQug8w7iHEBb5oga3J8qgpAURjtpzFDo FSwKerrzeGEB0EvUGQsZFZBolawBBe9Rd2o/comuz9rEPdjpTFRTiedO/nuZThmg1EZx Dw8RVILUSI+DED+ca/CR/mNhlqwkdgHcG89eIg+0/aDNnGcjFLj/FK8Bt7lOL+NGLLv7 mlWt6sUcAfeR/U8ZHd2M5c9oPiDf5hmSdjFWDVNWwQrJF2w77TnjvyQJJNc83JyBu1lz 5I9JPOPjTSXpiO8Cp0DG7XJidU0Lbf8IrsvkQFhcfO+DiRMgP6s+LdzhxF540k351gK4 Q+TQ== X-Gm-Message-State: ALoCoQlTZdtKapSXaHLDbncWiju89r2dPNe0+jdTDTbzVZcSe3FqlF31ZhtmPCxGAmG0X+zh8tdolJonvG3U9nR3sR+ANmqRoQ== MIME-Version: 1.0 X-Received: by 10.194.216.100 with SMTP id op4mr24720553wjc.85.1453148539498; Mon, 18 Jan 2016 12:22:19 -0800 (PST) Received: by 10.28.137.2 with HTTP; Mon, 18 Jan 2016 12:22:19 -0800 (PST) In-Reply-To: <66FED347-B7C6-4A73-8641-88B61418E150@gazagnaire.org> References: <6CCAF6CF-BC3D-4C2C-99A3-0435C61D16D4@cam.ac.uk> <663e4a04546e2d509c45d83fab5e99b9@cam.ac.uk> <66FED347-B7C6-4A73-8641-88B61418E150@gazagnaire.org> Date: Mon, 18 Jan 2016 20:22:19 +0000 Message-ID: From: David Scott To: Thomas Gazagnaire Cc: Rupert Horlick , "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Irmin on BLOCK X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6462077409794705937==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============6462077409794705937== Content-Type: multipart/alternative; boundary=089e014935f480b8fd0529a18291 --089e014935f480b8fd0529a18291 Content-Type: text/plain; charset=UTF-8 On Mon, Jan 18, 2016 at 8:13 PM, Thomas Gazagnaire wrote: > Seems that Dave has been busy: > > https://github.com/djs55/ocaml-btree > > (sorry Dave if I spoiled your future announcement) > That's ok -- I'm still experimenting with interfaces and disk layouts. It'll be a while before I have anything that works! Most of the interesting function bodies are still `failwith "unimplemented: ..."` and I've not thought enough about how the GC would work. Cheers, Dave > > Thomas > > > > On 11 Nov 2015, at 15:28, Nik Sultana wrote: > > > > Coincidentally B-trees came up recently on Ocaml-list: > > https://sympa.inria.fr/sympa/arc/caml-list/2015-11/msg00011.html > > > > > > On 2015-11-11 09:58, Rupert Horlick wrote: > >> Hmm, it seems like that is built on top of a few packages that don't > >> exist any more to interface between Baardskeerder and Mirage. > >> Do you think it's worth doing a simple B-Tree implementation myself, > >> or would it be better to try and build a new interface module for > >> Mirage and Baardskeerder? > >> A B-Tree implementation would certainly be good for the project > >> write-up, but let me know what you think. > >> Rupert > >> On Tue, Nov 10, 2015 at 8:58 PM Richard Mortier > >> wrote: > >>> On 10 November 2015 at 16:49, Rupert Horlick > >>> wrote: > >>>> I'm implementing this for a Part II project, so I've decided to > >>> go ahead and > >>>> implement my own simple FS for BLOCK, rather than using IRMIN. > >>>> However, I'm coming across the difficulties that Dave mentioned, > >>> Simple and in-memory is (surely!) still good to start with though! > >>>> so I'm > >>>> reading up on B-trees as we speak. I may well end up writing a > >>> simple B-tree > >>>> library, so I'll let know you if I do. > >>> There may be most of such a thing already I think -- Chris > >>> Greenhalgh > >>> at Nottingham lashed something up a while ago based on > >>> Baardskeerder, > >>> see https://github.com/cgreenhalgh/ocaml-btree [1] (though based on > >>> a much > >>> much earlier version of Mirage :) > >>> -- > >>> Richard Mortier > >>> richard.mortier@cl.cam.ac.uk > >> Links: > >> ------ > >> [1] https://github.com/cgreenhalgh/ocaml-btree > >> _______________________________________________ > >> MirageOS-devel mailing list > >> MirageOS-devel@lists.xenproject.org > >> http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > > > > _______________________________________________ > > MirageOS-devel mailing list > > MirageOS-devel@lists.xenproject.org > > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --089e014935f480b8fd0529a18291 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Mon, Jan 18, 2016 at 8:13 PM, Thomas Gazagnaire &l= t;thomas@gazagna= ire.org> wrote:
Seems that = Dave has been busy:

https://github.com/djs55/ocaml-btree

(sorry Dave if I spoiled your future announcement)
That's ok -- I'm still experimenting with interfaces an= d disk layouts. It'll be a while before I have anything that works! Mos= t of the interesting function bodies are still `failwith "unimplemente= d: ..."` and I've not thought enough about how the GC would work.<= /div>

Cheers,
Dave

= =C2=A0

Thomas


> On 11 Nov 2015, at 15:28, Nik Sultana <ns441@cam.ac.uk> wrote:
>
> Coincidentally B-trees came up recently on Ocaml-list:
>=C2=A0 https://sympa.inria.fr/sy= mpa/arc/caml-list/2015-11/msg00011.html
>
>
> On 2015-11-11 09:58, Rupert Horlick wrote:
>> Hmm, it seems like that is built on top of a few packages that don= 't
>> exist any more to interface between Baardskeerder and Mirage.
>> Do you think it's worth doing a simple B-Tree implementation m= yself,
>> or would it be better to try and build a new interface module for<= br> >> Mirage and Baardskeerder?
>> A B-Tree implementation would certainly be good for the project >> write-up, but let me know what you think.
>> Rupert
>> On Tue, Nov 10, 2015 at 8:58 PM Richard Mortier
>> <richard.mortie= r@cl.cam.ac.uk> wrote:
>>> On 10 November 2015 at 16:49, Rupert Horlick <rh572@cam.ac.uk>
>>> wrote:
>>>> I'm implementing this for a Part II project, so I'= ve decided to
>>> go ahead and
>>>> implement my own simple FS for BLOCK, rather than using IR= MIN.
>>>> However, I'm coming across the difficulties that Dave = mentioned,
>>> Simple and in-memory is (surely!) still good to start with tho= ugh!
>>>> so I'm
>>>> reading up on B-trees as we speak. I may well end up writi= ng a
>>> simple B-tree
>>>> library, so I'll let know you if I do.
>>> There may be most of such a thing already I think -- Chris
>>> Greenhalgh
>>> at Nottingham lashed something up a while ago based on
>>> Baardskeerder,
>>> see https://github.com/cgreenhalgh/ocaml-btre= e [1] (though based on
>>> a much
>>> much earlier version of Mirage :)
>>> --
>>> Richard Mortier
>>> richard.mortie= r@cl.cam.ac.uk
>> Links:
>> ------
>> [1] https://github.com/cgreenhalgh/ocaml-btree
>> _______________________________________________
>> MirageOS-devel mailing list
>> MirageOS-de= vel@lists.xenproject.org
>> http://lists.xenproject.= org/cgi-bin/mailman/listinfo/mirageos-devel
>
> _______________________________________________
> MirageOS-devel mailing list
> MirageOS-devel@= lists.xenproject.org
> http://lists.xenproject.org/= cgi-bin/mailman/listinfo/mirageos-devel


_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
http://lists.xenproject.org/cgi-b= in/mailman/listinfo/mirageos-devel



--
=
Dave Scott
--089e014935f480b8fd0529a18291-- --===============6462077409794705937== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============6462077409794705937==-- From mirageos-devel-bounces@lists.xenproject.org Mon Jan 18 23:05:06 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 18 Jan 2016 23:05:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLIr6-0007li-Ob; Mon, 18 Jan 2016 23:05:00 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLIcS-0006uH-Bk for mirageos-devel@lists.xenproject.org; Mon, 18 Jan 2016 22:49:52 +0000 Received: from [85.158.143.35] by server-3.bemta-4.messagelabs.com id 21/43-31122-F0C6D965; Mon, 18 Jan 2016 22:49:51 +0000 X-Env-Sender: olivier.nicole@ensta-paristech.fr X-Msg-Ref: server-9.tower-21.messagelabs.com!1453157390!10770431!1 X-Originating-IP: [147.250.10.4] X-SpamReason: No, hits=-2.0 required=7.0 tests=ML_FP_R_142 X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 47495 invoked from network); 18 Jan 2016 22:49:50 -0000 Received: from ns4.ensta.fr (HELO ns4.ensta.fr) (147.250.10.4) by server-9.tower-21.messagelabs.com with SMTP; 18 Jan 2016 22:49:50 -0000 Received: from ns4.ensta.fr (localhost [127.0.0.1]) by ns4.ensta.fr (Postfix) with ESMTP id EC538F741E; Mon, 18 Jan 2016 23:49:49 +0100 (CET) X-Virus-Scanned: amavisd-new at ns4.ensta.fr Received: from ns4.ensta.fr ([127.0.0.1]) by ns4.ensta.fr (ns4.ensta.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s_B9NDw2Ke6E; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from zemail.ensta.fr (zemail.ensta.fr [147.250.1.16]) by ns4.ensta.fr (Postfix) with ESMTP id 9FA30F741C; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zemail.ensta.fr (Postfix) with ESMTP id 8E8D42981F9; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from zemail.ensta.fr ([127.0.0.1]) by localhost (zemail.ensta.fr [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id gdXbFktGy45b; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zemail.ensta.fr (Postfix) with ESMTP id 23C5229814D; Mon, 18 Jan 2016 23:49:47 +0100 (CET) X-Virus-Scanned: amavisd-new at zemail.ensta.fr Received: from zemail.ensta.fr ([127.0.0.1]) by localhost (zemail.ensta.fr [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 4AHSRKQjESOm; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from [147.250.85.254] (unknown [147.250.85.254]) by zemail.ensta.fr (Postfix) with ESMTPSA id EFCA029814B; Mon, 18 Jan 2016 23:49:46 +0100 (CET) From: Olivier Nicole X-Enigmail-Draft-Status: N1110 To: mirageos-devel@lists.xenproject.org Message-ID: <569D6C04.7080409@ensta.fr> Date: Mon, 18 Jan 2016 23:49:40 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------030909060806060301040801" X-Mailman-Approved-At: Mon, 18 Jan 2016 23:04:59 +0000 Cc: Michel Mauny Subject: [MirageOS-devel] Macros for OCaml project: internship possibilities X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org This is a multi-part message in MIME format. --------------030909060806060301040801 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hello, Looking for an internship this summer, I would be extremely interested to work on the Macros for OCaml project under the supervision of Jeremy Yallop. I am a French undergraduate student (first year of M.Sc.) studying Computer Science at ENSTA ParisTech (one of the top 20 French engineering schools), with a very strong interest in functional programmi= ng. I especially appreciate programming in OCaml and Haskell (some of my personal projects are available on GitHub: https://github.com/OlivierNicole); I am passionnate about language constructs and I am eager to learn. My supervisor Michel Mauny (professor at ENSTA and major OCaml contributor) supports me about this application. In addition, I am going to attend Dr. Mauny's course about programming languages and compiler design, and he is ready to help me acquire the necessary skills for the project. If you are interested in my profile or need further information, please contact me. I would be available between May and August for 3 or 4 months= . Thank you for your consideration. Yours sincerely, Olivier Nicole +33 6 51 74 44 85 Computer Science student 1st year of M.Sc. Paris-Saclay university ENSTA ParisTech 828, bd des Mar=C3=A9chaux F91120 PALAISEAU -------------------------- --------------030909060806060301040801 Content-Type: application/pdf; name="resume_Olivier_Nicole.pdf" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="resume_Olivier_Nicole.pdf" JVBERi0xLjUKJeTw7fgKMjUgMCBvYmoKPDwvRmlsdGVyL0ZsYXRlRGVjb2RlL0xlbmd0aCAy MDYxPj4Kc3RyZWFtCnjatVm5khtHDM39FRNKAVt9H1UsBqqy7HImezOXAx47SqxATvz7bgCN bszskFxK3lJRy2n2AaDxHo6Zvk1m0vWfmZKdUiwql+n8FYf09Psv7cs/X6aPT9OHT2ZyTuXk pqd58kFlN+1SUT5MT5c/91oHrbXP9WO1Tpr+uvqJ+rBz2tQZ/kyj9lRnG5rt7OGvp9+mn58m DVuN/+D45QjLYSeTlDVByGF0VNE3QeyxbQ/H+CrApX7KWphoSBAW01/ouQpUZ9g6w5zb6Iwi 6npMVK4dwktc2wK/d43F2KkfaEmMiFvyDgcb4LfSrfDC9q+2i5uKKhGvx8asUph20SkTm8Tm 1O6nfmZW1Ln9kCb2kZgP2TYt7elgM3yfSSPQLJxIj7EKDXY6GKP3cP2HEKUFT3wkTgdVXVI6 V4uaKjLfW/212geNhOY7DSMlMlI7KFYV7IWFhVPgnvGTDzvvPcyB24fVz3jezgbwEDyQPdY/ 0xT4wPTUDwiO9EebpfbXkNM4g5qiTeKZBUFrRVoF9y9Vbz7+4ZMXN1S/WaH/u1/f0xxxi/Cj 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_______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --------------030909060806060301040801-- From mirageos-devel-bounces@lists.xenproject.org Mon Jan 18 23:05:06 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 18 Jan 2016 23:05:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLIr6-0007li-Ob; Mon, 18 Jan 2016 23:05:00 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLIcS-0006uH-Bk for mirageos-devel@lists.xenproject.org; Mon, 18 Jan 2016 22:49:52 +0000 Received: from [85.158.143.35] by server-3.bemta-4.messagelabs.com id 21/43-31122-F0C6D965; Mon, 18 Jan 2016 22:49:51 +0000 X-Env-Sender: olivier.nicole@ensta-paristech.fr X-Msg-Ref: server-9.tower-21.messagelabs.com!1453157390!10770431!1 X-Originating-IP: [147.250.10.4] X-SpamReason: No, hits=-2.0 required=7.0 tests=ML_FP_R_142 X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 47495 invoked from network); 18 Jan 2016 22:49:50 -0000 Received: from ns4.ensta.fr (HELO ns4.ensta.fr) (147.250.10.4) by server-9.tower-21.messagelabs.com with SMTP; 18 Jan 2016 22:49:50 -0000 Received: from ns4.ensta.fr (localhost [127.0.0.1]) by ns4.ensta.fr (Postfix) with ESMTP id EC538F741E; Mon, 18 Jan 2016 23:49:49 +0100 (CET) X-Virus-Scanned: amavisd-new at ns4.ensta.fr Received: from ns4.ensta.fr ([127.0.0.1]) by ns4.ensta.fr (ns4.ensta.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s_B9NDw2Ke6E; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from zemail.ensta.fr (zemail.ensta.fr [147.250.1.16]) by ns4.ensta.fr (Postfix) with ESMTP id 9FA30F741C; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zemail.ensta.fr (Postfix) with ESMTP id 8E8D42981F9; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from zemail.ensta.fr ([127.0.0.1]) by localhost (zemail.ensta.fr [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id gdXbFktGy45b; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zemail.ensta.fr (Postfix) with ESMTP id 23C5229814D; Mon, 18 Jan 2016 23:49:47 +0100 (CET) X-Virus-Scanned: amavisd-new at zemail.ensta.fr Received: from zemail.ensta.fr ([127.0.0.1]) by localhost (zemail.ensta.fr [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 4AHSRKQjESOm; Mon, 18 Jan 2016 23:49:47 +0100 (CET) Received: from [147.250.85.254] (unknown [147.250.85.254]) by zemail.ensta.fr (Postfix) with ESMTPSA id EFCA029814B; Mon, 18 Jan 2016 23:49:46 +0100 (CET) From: Olivier Nicole X-Enigmail-Draft-Status: N1110 To: mirageos-devel@lists.xenproject.org Message-ID: <569D6C04.7080409@ensta.fr> Date: Mon, 18 Jan 2016 23:49:40 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------030909060806060301040801" X-Mailman-Approved-At: Mon, 18 Jan 2016 23:04:59 +0000 Cc: Michel Mauny Subject: [MirageOS-devel] Macros for OCaml project: internship possibilities X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org This is a multi-part message in MIME format. --------------030909060806060301040801 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hello, Looking for an internship this summer, I would be extremely interested to work on the Macros for OCaml project under the supervision of Jeremy Yallop. I am a French undergraduate student (first year of M.Sc.) studying Computer Science at ENSTA ParisTech (one of the top 20 French engineering schools), with a very strong interest in functional programmi= ng. I especially appreciate programming in OCaml and Haskell (some of my personal projects are available on GitHub: https://github.com/OlivierNicole); I am passionnate about language constructs and I am eager to learn. My supervisor Michel Mauny (professor at ENSTA and major OCaml contributor) supports me about this application. In addition, I am going to attend Dr. Mauny's course about programming languages and compiler design, and he is ready to help me acquire the necessary skills for the project. If you are interested in my profile or need further information, please contact me. I would be available between May and August for 3 or 4 months= . Thank you for your consideration. Yours sincerely, Olivier Nicole +33 6 51 74 44 85 Computer Science student 1st year of M.Sc. Paris-Saclay university ENSTA ParisTech 828, bd des Mar=C3=A9chaux F91120 PALAISEAU -------------------------- --------------030909060806060301040801 Content-Type: application/pdf; name="resume_Olivier_Nicole.pdf" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="resume_Olivier_Nicole.pdf" JVBERi0xLjUKJeTw7fgKMjUgMCBvYmoKPDwvRmlsdGVyL0ZsYXRlRGVjb2RlL0xlbmd0aCAy MDYxPj4Kc3RyZWFtCnjatVm5khtHDM39FRNKAVt9H1UsBqqy7HImezOXAx47SqxATvz7bgCN bszskFxK3lJRy2n2AaDxHo6Zvk1m0vWfmZKdUiwql+n8FYf09Psv7cs/X6aPT9OHT2ZyTuXk pqd58kFlN+1SUT5MT5c/91oHrbXP9WO1Tpr+uvqJ+rBz2tQZ/kyj9lRnG5rt7OGvp9+mn58m DVuN/+D45QjLYSeTlDVByGF0VNE3QeyxbQ/H+CrApX7KWphoSBAW01/ouQpUZ9g6w5zb6Iwi 6npMVK4dwktc2wK/d43F2KkfaEmMiFvyDgcb4LfSrfDC9q+2i5uKKhGvx8asUph20SkTm8Tm 1O6nfmZW1Ln9kCb2kZgP2TYt7elgM3yfSSPQLJxIj7EKDXY6GKP3cP2HEKUFT3wkTgdVXVI6 V4uaKjLfW/212geNhOY7DSMlMlI7KFYV7IWFhVPgnvGTDzvvPcyB24fVz3jezgbwEDyQPdY/ 0xT4wPTUDwiO9EebpfbXkNM4g5qiTeKZBUFrRVoF9y9Vbz7+4ZMXN1S/WaH/u1/f0xxxi/Cj 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_______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --------------030909060806060301040801-- From mirageos-devel-bounces@lists.xenproject.org Wed Jan 20 03:26:15 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 20 Jan 2016 03:26:15 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLjPI-0004eb-39; Wed, 20 Jan 2016 03:26:04 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLjPG-0004eW-BE for mirageos-devel@lists.xenproject.org; Wed, 20 Jan 2016 03:26:02 +0000 Received: from [193.109.254.147] by server-10.bemta-14.messagelabs.com id 6F/30-25438-94EFE965; Wed, 20 Jan 2016 03:26:01 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-16.tower-27.messagelabs.com!1453260360!17962122!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.9 required=7.0 tests=DATE_IN_PAST_03_06, RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 34512 invoked from network); 20 Jan 2016 03:26:00 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-16.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 20 Jan 2016 03:26:00 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 10329e0f; Wed, 20 Jan 2016 03:25:59 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=OFKjrHM3/CUFFy6Y62b0TQ32/v4=; b=iIhyAzLgtYbvJqu/R7 USUR1sofMrqeirh8L6+Oo3E9Ft9fjZQ7mef0OCCRgWas6hEhEMPOQlyEM+PNas7q 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[MirageOS-devel] Unmapping grants is unsafe X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org > On 17 Jan 2016, at 14:54, Thomas Leonard wrote: > > On 15 January 2016 at 16:15, Anil Madhavapeddy wrote: >> >>> On 4 Jan 2016, at 14:26, Thomas Leonard wrote: >>> >>> On 3 January 2016 at 10:38, Thomas Leonard wrote: >>>> On 2 January 2016 at 14:35, Mindy wrote: >>>>> On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >>>>>> >>>>>> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>>>>>> >>>>>>> I have a Mirage firewall running now under Qubes: >>>>>>> >>>>>>> >>>>>>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ >>> [...] >>>>>>> - Mirage allows you to access memory after unmapping it. This isn't >>>>>>> safe (may page-fault or give access to someone else's data). I've >>>>>>> added checks in mirage-net-xen to make sure we don't try to access a >>>>>>> ring after unmapping it [1], but I think this should be fixed at the >>>>>>> Bigarray level [2]. >>>>>>> >>>>>> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >>>>>> have a checkout handy here and it's hard to map a commit to the >>>>>> associated PRs in the web UI. >>>> >>>> I haven't submitted a PR yet. Need to update it to master and test. >>> >>> https://github.com/ocaml/ocaml/pull/389 >>> >>> However, they're not keen on merging it, for performance reasons. >>> Also, it would mean changing Cstruct, which currently says: >>> >>>> We try to maintain the property that no constructed [t] can ever point out of >>>> its underlying buffer. This property is guarded by all of the constructing >>>> functions and the fact that the type is private, and used by various >>>> functions that would otherwise be completely unsafe. >>> >>> I wonder if we should instead change Gnt.Gnttab.Local_mapping.to_buf >>> so that instead of returning an Io_page it returns something else, >>> which provides similar operations but: >>> >>> a) checks every access to ensure it hasn't been unmapped, and >>> b) doesn't allow you to get a Cstruct or Bigarray from it. >>> >>> However, this would mean a largish API change. >> >> Before going through the epic amount of work that an API change would make in upstream libraries, perhaps we should build a small unit test that rapidly does a simple data copy across domains and benchmark it? >> >> I think any new API should do very explicit lifetimes for the grant buffers (i.e. not depend on the GC to cleanup), but also minimise copying the data if at all possible. While it's dangerous to read from a shared memory buffer if you don't trust the other side, an enforced copy does make it hard to build efficient unikernel proxies that are just transferring data across shared rings. > > A simpler solution might be to rename [to_buf] to [to_buf_unsafe] and > provide a safe [blit] operation (that fails if the buffer is no longer > mapped). The block and net drivers already copy, so they could use the > safe interface. > > shared-memory-ring currently reads directly, but maybe it shouldn't > anyway (whether frontend or backend) to avoid TOCTOU issues. Yes, this sounds reasonable for the block and net drivers, and any lingering users of `to_buf` could be fixed up easily. -Anil _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 20 03:26:15 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 20 Jan 2016 03:26:15 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLjPI-0004eb-39; Wed, 20 Jan 2016 03:26:04 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLjPG-0004eW-BE for mirageos-devel@lists.xenproject.org; Wed, 20 Jan 2016 03:26:02 +0000 Received: from [193.109.254.147] by server-10.bemta-14.messagelabs.com id 6F/30-25438-94EFE965; Wed, 20 Jan 2016 03:26:01 +0000 X-Env-Sender: anil@recoil.org X-Msg-Ref: server-16.tower-27.messagelabs.com!1453260360!17962122!1 X-Originating-IP: [5.153.225.51] X-SpamReason: No, hits=0.9 required=7.0 tests=DATE_IN_PAST_03_06, RCVD_ILLEGAL_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 34512 invoked from network); 20 Jan 2016 03:26:00 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-16.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 20 Jan 2016 03:26:00 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 10329e0f; Wed, 20 Jan 2016 03:25:59 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=OFKjrHM3/CUFFy6Y62b0TQ32/v4=; b=iIhyAzLgtYbvJqu/R7 USUR1sofMrqeirh8L6+Oo3E9Ft9fjZQ7mef0OCCRgWas6hEhEMPOQlyEM+PNas7q jt/YgOnYlvbN43hYZLM4OItZDPsm0hLJuWFxAP7PB9sdH8wmlQR+x45KC1PMtaSO J0HYc/DGzthI9ReAJJiQ+sIJ8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= selector1; b=Y01gRbiY4pzBv/Fvl6DGwZ3FO90MpmJyCedmUZARrWKdBKWbwa0 SEnMGQ9FqUeB75Ei9mkGr61vHF/aj2Xpon1/ey9T8u5NSwO0zIJkzs3ko7vpY6oM Yr8jqsca3enJCp9mMcuDGre/57s8pOxvyp83rivc0HOf0lL7VL3jFJmg= Received: by bark.recoil.org (OpenSMTPD) with ESMTPSA id 66687ad1 TLS version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO; Wed, 20 Jan 2016 03:25:59 +0000 (GMT) Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) From: Anil Madhavapeddy In-Reply-To: Date: Tue, 19 Jan 2016 22:04:07 +0000 Message-Id: <72A60708-DB97-44E0-8FD7-42E183180FCC@recoil.org> References: <8800A03F-EB2A-418F-84C8-AA153305F720@recoil.org> To: Thomas Leonard X-Mailer: Apple Mail (2.3096.5) Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Unmapping grants is unsafe X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org > On 17 Jan 2016, at 14:54, Thomas Leonard wrote: > > On 15 January 2016 at 16:15, Anil Madhavapeddy wrote: >> >>> On 4 Jan 2016, at 14:26, Thomas Leonard wrote: >>> >>> On 3 January 2016 at 10:38, Thomas Leonard wrote: >>>> On 2 January 2016 at 14:35, Mindy wrote: >>>>> On 01/02/2016 12:14 PM, Anil Madhavapeddy wrote: >>>>>> >>>>>> On 2 Jan 2016, at 12:07, Thomas Leonard wrote: >>>>>>> >>>>>>> I have a Mirage firewall running now under Qubes: >>>>>>> >>>>>>> >>>>>>> http://roscidus.com/blog/blog/2016/01/01/a-unikernel-firewall-for-qubesos/ >>> [...] >>>>>>> - Mirage allows you to access memory after unmapping it. This isn't >>>>>>> safe (may page-fault or give access to someone else's data). I've >>>>>>> added checks in mirage-net-xen to make sure we don't try to access a >>>>>>> ring after unmapping it [1], but I think this should be fixed at the >>>>>>> Bigarray level [2]. >>>>>>> >>>>>> Did that Bigarray patch get committed into OCaml 4.03dev? I dont >>>>>> have a checkout handy here and it's hard to map a commit to the >>>>>> associated PRs in the web UI. >>>> >>>> I haven't submitted a PR yet. Need to update it to master and test. >>> >>> https://github.com/ocaml/ocaml/pull/389 >>> >>> However, they're not keen on merging it, for performance reasons. >>> Also, it would mean changing Cstruct, which currently says: >>> >>>> We try to maintain the property that no constructed [t] can ever point out of >>>> its underlying buffer. This property is guarded by all of the constructing >>>> functions and the fact that the type is private, and used by various >>>> functions that would otherwise be completely unsafe. >>> >>> I wonder if we should instead change Gnt.Gnttab.Local_mapping.to_buf >>> so that instead of returning an Io_page it returns something else, >>> which provides similar operations but: >>> >>> a) checks every access to ensure it hasn't been unmapped, and >>> b) doesn't allow you to get a Cstruct or Bigarray from it. >>> >>> However, this would mean a largish API change. >> >> Before going through the epic amount of work that an API change would make in upstream libraries, perhaps we should build a small unit test that rapidly does a simple data copy across domains and benchmark it? >> >> I think any new API should do very explicit lifetimes for the grant buffers (i.e. not depend on the GC to cleanup), but also minimise copying the data if at all possible. While it's dangerous to read from a shared memory buffer if you don't trust the other side, an enforced copy does make it hard to build efficient unikernel proxies that are just transferring data across shared rings. > > A simpler solution might be to rename [to_buf] to [to_buf_unsafe] and > provide a safe [blit] operation (that fails if the buffer is no longer > mapped). The block and net drivers already copy, so they could use the > safe interface. > > shared-memory-ring currently reads directly, but maybe it shouldn't > anyway (whether frontend or backend) to avoid TOCTOU issues. Yes, this sounds reasonable for the block and net drivers, and any lingering users of `to_buf` could be fixed up easily. -Anil _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 20 03:27:12 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 20 Jan 2016 03:27:12 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLjQO-0004hN-GF; Wed, 20 Jan 2016 03:27:12 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aLjQM-0004hH-Ag for mirageos-devel@lists.xenproject.org; Wed, 20 Jan 2016 03:27:10 +0000 Received: from [193.109.254.147] by server-2.bemta-14.messagelabs.com id F9/65-12889-D8EFE965; Wed, 20 Jan 2016 03:27:09 +0000 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<7B62EA03-7B91-41BA-8963-29D45F4D6D46@internetmachines.co.uk> To: Nick Hardiman X-Mailer: Apple Mail (2.3096.5) Cc: mirageos-devel Subject: Re: [MirageOS-devel] Hardware choices for ARM64 X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org VGhlcmUncyBiZWVuIHNvbWUgcHJvZ3Jlc3Mgb24gZmluZGluZyBBUk02NCBob3N0aW5nIG9ubGlu ZSBub3cuICBKdXN0aW4gZm91bmQgb25lIHRoYXQgaGUgc2VlbXMgdG8gYmUgdXNpbmcgc3VjY2Vz c2Z1bGx5IChpZiBzbG93bHkpLi4uIHdobyBpcyB0aGUgcHJvdmlkZXI/CgpJIGRvbid0IGZpbmQg dGhhdCBBUk0gaXMgcGFydGljdWxhcmx5IGJlbmVmaWNpYWwgZm9yIG9ubGluZSBob3N0aW5nIG91 dHNpZGUgb2YgaGF2aW5nIGEgY29udmVuaWVudCBidWlsZCBib3ggdG8gZ2VuZXJhdGUgYmluYXJp 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([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aNgZ5-0002oC-Dr; Mon, 25 Jan 2016 12:48:15 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aNgZ3-0002o3-GN for mirageos-devel@lists.xenproject.org; Mon, 25 Jan 2016 12:48:13 +0000 Received: from [85.158.139.211] by server-7.bemta-5.messagelabs.com id 6A/CD-13905-C8916A65; Mon, 25 Jan 2016 12:48:12 +0000 X-Env-Sender: martin@lucina.net X-Msg-Ref: server-15.tower-206.messagelabs.com!1453726091!9542752!1 X-Originating-IP: [62.176.169.44] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 36335 invoked from network); 25 Jan 2016 12:48:12 -0000 Received: from smtp.lucina.net (HELO smtp.lucina.net) (62.176.169.44) by server-15.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 25 Jan 2016 12:48:12 -0000 Received: from nodbug.lucina.net (chello089173222227.chello.sk [89.173.222.227]) by smtp.lucina.net (Postfix) with ESMTPSA id A441F122801; Mon, 25 Jan 2016 13:46:29 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lucina.net; s=dkim-201309; t=1453725989; bh=GZl8kyjPfjFUJTbrjlHcmkoh76yHs+6Ho0eNrtVQH/g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=CW/HSdiWwLb1gw5ah2nupaKGTd8dEMQE5lZtu4OUN3wy30Wr8S2vKMggKLJSwqFy/ H5rv3Zf84TQDlh6TKJ4FIZoQBlfcGC7/a+JuquULXBkxqTrSa6CjCLnw6BJIdaETDS UyLtutoCqvvsVTp8nkt3PARepVfrWeidRhSvdWVmWvMUR6SKHVtfK4jZNYs5GKwUol S3Lc1L5oGLTWRTiF7A11DIuVk+PxntlJlp5mto5rgNSsRZkV2cz3h6LRSG9h8rMoTi 7g7/T0QxhkNXTRd26H1LOhNDqBFHk3wy8C96+OT/3NKikBwTYBMaXij+qp2HWdO+vp G5NhvkZfai6mA== Received: by nodbug.lucina.net (Postfix, from userid 1000) id B29C24C0F38; Mon, 25 Jan 2016 13:48:11 +0100 (CET) Date: Mon, 25 Jan 2016 13:48:11 +0100 From: Martin Lucina To: Anil Madhavapeddy Message-ID: <20160125124811.GF32307@nodbug.lucina.net> Mail-Followup-To: Anil Madhavapeddy , rumpkernel-users , mirageos-devel References: <20151221142552.GA5387@nodbug.lucina.net> <567FC653.9060605@iki.fi> <20151227191025.GA10060@nodbug.lucina.net> <56853624.2080802@iki.fi> <20160104121514.GB906@nodbug.lucina.net> <9FD6403E-920C-44BE-AAE2-976B14D200A4@recoil.org> MIME-Version: 1.0 Content-Length: 4205 Content-Disposition: inline In-Reply-To: <9FD6403E-920C-44BE-AAE2-976B14D200A4@recoil.org> User-Agent: Mutt/1.5.23 (2014-03-12) Cc: rumpkernel-users , mirageos-devel Subject: Re: [MirageOS-devel] [RFC/PULL]: Rumprun configuration specification and rototill X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Monday, 04.01.2016 at=A012:27, Anil Madhavapeddy wrote: > On 4 Jan 2016, at 12:15, Martin Lucina wrote: > > = > > If I have a Mirage/Rumprun hybrid unikernel (whether using -k or not, > > irrelevant) and I would like Rumprun to mount some block devices, but > > Mirage to handle the network stack, can I express this using a single > > JSON configuration? > > = > > I've not thought about this enough, but it would seem to imply that Rum= prun > > config would handle "fs", but not "net", which would be passed to Mirage > > somehow. A strawman of how this could work: > > = > > 1) We would need to specify the method that rumprun uses to pass the > > configuration on to the application. This could be as simple as writing= it > > out to "/config.json". > > = > > 2) In a hybrid unikernel as described above, presumably -lrumpnet_netin= et > > and -lrumpnet_netinet6 would not be linked in. This would have to be > > exposed to config.c somehow (through a data structure with a list of > > baked-in components at rumprun-bake time?), and on this basis (no netin= et), > > config.c would not handle those parts of the configuration. > > = > > I may be completely off on the wrong track here -- would appreciate inp= ut > > from the Mirage (and other?) unikernel folks on this list. This would a= lso > > be a good discussion to have on the "cross-project" unikernel.org once = the > > discourse.org setup there is complete. > = > It sounds to me like this is a map function over the configuration: you > want to pass the JSON tree to a function that descends over the various > nodes that convert the configuration into a concrete (device_tree,linker) > tuple. > = > The output of this could then grabbed by the linker or domain builder in > order to satisfy their particular jobs. Bear in mind that Mirage or > HalVM may also want their own linking flags that are OCaml- or Haskell- > specific as well. > = > So if Mirage provided a set of command-line binaries that accepted > a JSON configuration fragment for just the network and storage setup, > and rumprun have the ability to shell out to them to delegate a portion > of the configuration, that might be a nice way to glue different toolchai= ns > together...? > = > (Assuming I've understood rumprun's role in this correctly as the main > entrypoint command). That [rumprun's role as main entrypoint command, which also happens to do config parsing and application] is currently correct. However, in the case of hybrid Rump/X unikernels, and indeed also in the case of gorump or other future users of kernonly mode I'm not convinced that there should be a (rumprun-provided) configuration parser/executor at all. If there is a "main entrypoint", akin to a "/sbin/init", which is responsible for parsing and applying the configuration, then it becomes hard to delegate parts of that configuration to other layers. Conceptually, as you wrote, it is just a map function. However that map function would need to know: a) Which components are present in the unikernel as a whole. b) Which of those components are to be configured by the (rumprun-provide= d) config layer. c) Which of those components are to be configured by the (from rumprun's PoV) application layers. d) We would also need to define an interface for c). Thinking about it, this means we have the layering wrong. It seems to me that we need an extra split: 1) A config library with a C API to apply the various bits of configuration. 2) The configuration parser / "main entrypoint" which is a client of 1). Now, rumprun unikernels which run full libc applications get 1) and 2), i.e. more or less what we have today. In the case of kernonly/Mirage/other hybrids, it would be the responsibility of the (non-rumprun-provided) "main entrypoint") to provide a 2) compliant with the spec and call out to 1) for those rump kernel components it wants to configure. Thoughts? I realise this is a bit handwavy, but it's the best idea I have so far. = _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Mon Jan 25 12:48:24 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 25 Jan 2016 12:48:24 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aNgZ5-0002oC-Dr; Mon, 25 Jan 2016 12:48:15 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aNgZ3-0002o3-GN for mirageos-devel@lists.xenproject.org; Mon, 25 Jan 2016 12:48:13 +0000 Received: from [85.158.139.211] by server-7.bemta-5.messagelabs.com id 6A/CD-13905-C8916A65; Mon, 25 Jan 2016 12:48:12 +0000 X-Env-Sender: martin@lucina.net X-Msg-Ref: server-15.tower-206.messagelabs.com!1453726091!9542752!1 X-Originating-IP: [62.176.169.44] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 36335 invoked from network); 25 Jan 2016 12:48:12 -0000 Received: from smtp.lucina.net (HELO smtp.lucina.net) (62.176.169.44) by server-15.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 25 Jan 2016 12:48:12 -0000 Received: from nodbug.lucina.net (chello089173222227.chello.sk [89.173.222.227]) by smtp.lucina.net (Postfix) with ESMTPSA id A441F122801; Mon, 25 Jan 2016 13:46:29 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lucina.net; s=dkim-201309; t=1453725989; bh=GZl8kyjPfjFUJTbrjlHcmkoh76yHs+6Ho0eNrtVQH/g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=CW/HSdiWwLb1gw5ah2nupaKGTd8dEMQE5lZtu4OUN3wy30Wr8S2vKMggKLJSwqFy/ H5rv3Zf84TQDlh6TKJ4FIZoQBlfcGC7/a+JuquULXBkxqTrSa6CjCLnw6BJIdaETDS UyLtutoCqvvsVTp8nkt3PARepVfrWeidRhSvdWVmWvMUR6SKHVtfK4jZNYs5GKwUol S3Lc1L5oGLTWRTiF7A11DIuVk+PxntlJlp5mto5rgNSsRZkV2cz3h6LRSG9h8rMoTi 7g7/T0QxhkNXTRd26H1LOhNDqBFHk3wy8C96+OT/3NKikBwTYBMaXij+qp2HWdO+vp G5NhvkZfai6mA== Received: by nodbug.lucina.net (Postfix, from userid 1000) id B29C24C0F38; Mon, 25 Jan 2016 13:48:11 +0100 (CET) Date: Mon, 25 Jan 2016 13:48:11 +0100 From: Martin Lucina To: Anil Madhavapeddy Message-ID: <20160125124811.GF32307@nodbug.lucina.net> Mail-Followup-To: Anil Madhavapeddy , rumpkernel-users , mirageos-devel References: <20151221142552.GA5387@nodbug.lucina.net> <567FC653.9060605@iki.fi> <20151227191025.GA10060@nodbug.lucina.net> <56853624.2080802@iki.fi> <20160104121514.GB906@nodbug.lucina.net> <9FD6403E-920C-44BE-AAE2-976B14D200A4@recoil.org> MIME-Version: 1.0 Content-Length: 4205 Content-Disposition: inline In-Reply-To: <9FD6403E-920C-44BE-AAE2-976B14D200A4@recoil.org> User-Agent: Mutt/1.5.23 (2014-03-12) Cc: rumpkernel-users , mirageos-devel Subject: Re: [MirageOS-devel] [RFC/PULL]: Rumprun configuration specification and rototill X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On Monday, 04.01.2016 at=A012:27, Anil Madhavapeddy wrote: > On 4 Jan 2016, at 12:15, Martin Lucina wrote: > > = > > If I have a Mirage/Rumprun hybrid unikernel (whether using -k or not, > > irrelevant) and I would like Rumprun to mount some block devices, but > > Mirage to handle the network stack, can I express this using a single > > JSON configuration? > > = > > I've not thought about this enough, but it would seem to imply that Rum= prun > > config would handle "fs", but not "net", which would be passed to Mirage > > somehow. A strawman of how this could work: > > = > > 1) We would need to specify the method that rumprun uses to pass the > > configuration on to the application. This could be as simple as writing= it > > out to "/config.json". > > = > > 2) In a hybrid unikernel as described above, presumably -lrumpnet_netin= et > > and -lrumpnet_netinet6 would not be linked in. This would have to be > > exposed to config.c somehow (through a data structure with a list of > > baked-in components at rumprun-bake time?), and on this basis (no netin= et), > > config.c would not handle those parts of the configuration. > > = > > I may be completely off on the wrong track here -- would appreciate inp= ut > > from the Mirage (and other?) unikernel folks on this list. This would a= lso > > be a good discussion to have on the "cross-project" unikernel.org once = the > > discourse.org setup there is complete. > = > It sounds to me like this is a map function over the configuration: you > want to pass the JSON tree to a function that descends over the various > nodes that convert the configuration into a concrete (device_tree,linker) > tuple. > = > The output of this could then grabbed by the linker or domain builder in > order to satisfy their particular jobs. Bear in mind that Mirage or > HalVM may also want their own linking flags that are OCaml- or Haskell- > specific as well. > = > So if Mirage provided a set of command-line binaries that accepted > a JSON configuration fragment for just the network and storage setup, > and rumprun have the ability to shell out to them to delegate a portion > of the configuration, that might be a nice way to glue different toolchai= ns > together...? > = > (Assuming I've understood rumprun's role in this correctly as the main > entrypoint command). That [rumprun's role as main entrypoint command, which also happens to do config parsing and application] is currently correct. However, in the case of hybrid Rump/X unikernels, and indeed also in the case of gorump or other future users of kernonly mode I'm not convinced that there should be a (rumprun-provided) configuration parser/executor at all. If there is a "main entrypoint", akin to a "/sbin/init", which is responsible for parsing and applying the configuration, then it becomes hard to delegate parts of that configuration to other layers. Conceptually, as you wrote, it is just a map function. However that map function would need to know: a) Which components are present in the unikernel as a whole. b) Which of those components are to be configured by the (rumprun-provide= d) config layer. c) Which of those components are to be configured by the (from rumprun's PoV) application layers. d) We would also need to define an interface for c). Thinking about it, this means we have the layering wrong. It seems to me that we need an extra split: 1) A config library with a C API to apply the various bits of configuration. 2) The configuration parser / "main entrypoint" which is a client of 1). Now, rumprun unikernels which run full libc applications get 1) and 2), i.e. more or less what we have today. In the case of kernonly/Mirage/other hybrids, it would be the responsibility of the (non-rumprun-provided) "main entrypoint") to provide a 2) compliant with the spec and call out to 1) for those rump kernel components it wants to configure. Thoughts? I realise this is a bit handwavy, but it's the best idea I have so far. = _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 26 03:43:53 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 26 Jan 2016 03:43:53 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aNuXe-0004nR-Te; Tue, 26 Jan 2016 03:43:42 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aNuXd-0004nM-6j for mirageos-devel@lists.xenproject.org; Tue, 26 Jan 2016 03:43:41 +0000 Received: from [85.158.137.68] by server-2.bemta-3.messagelabs.com id 56/16-21201-C6BE6A65; Tue, 26 Jan 2016 03:43:40 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-4.tower-31.messagelabs.com!1453779818!8453784!1 X-Originating-IP: [209.85.213.54] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 35719 invoked from network); 26 Jan 2016 03:43:39 -0000 Received: from mail-vk0-f54.google.com (HELO mail-vk0-f54.google.com) (209.85.213.54) by server-4.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 26 Jan 2016 03:43:39 -0000 Received: by mail-vk0-f54.google.com with SMTP id n1so85185237vkb.3 for ; Mon, 25 Jan 2016 19:43:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to:content-type; bh=rLqO/BC+2mn6ZxMJQ55zU9wyCKBfDMY0gTAYRvf9q8c=; b=jK0xVpA4Sr6MOVM9fKLjNpO/sEJL8YRGbc5dxkZqtw7h15HgzcA37D5Gel9hzDfZFX slKtwVd5sTuWPr0jmvefaWmABzUi3Wr5VPsFUhsp5q0jLmlhGgftGmTJjExBaYUP+dyr quNYM1k8xSGQZd7sFQmUsL694EsYA3B5zxQ1VJdUC5o8n9gRdhdUgMVFCYti6zgTd0sn j0yI9Ou1Y6k91lzppzwm25KaTnhbMsmTIxEnNTQeARIb14jv7/Pvj9vF3mimiYx2/tXX +J6nxV0wnH+p3bFtWsaoaW6bATGYXdU6YdgXGpNAq/BMOu4xPfR5ZGtm76mAK5hMeZUe RBeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:from:date:message-id:subject:to :content-type; bh=rLqO/BC+2mn6ZxMJQ55zU9wyCKBfDMY0gTAYRvf9q8c=; b=Vm36RbYp6sYunHG7ybRVtx5T0FiSWKMhrNMkTTzzTn+x1yIGu4JozCrD9MbtlWrXTQ s4HcgfkmjxLdzRHEVDGwNBjZQEEzd3ejkEcKFoO6P6sknCTsnTSH3e17Un2M70ZzxLRX jEwnSyYMc0VPqpcAAiOGJR8UIRXRTayAlJyCBNoIag1homTVkxqTL3+5CNxKAaubKAOV Nn9lV4ftBMYzVIhgMtiYrqmqTrSh3TKX/LTEa5C/JP5YwjMFXLm07ErRPXl/v13tr49n TLxQtQWxmSlci0r739oWw+rPBqaZ2TQX9lJ4IPYc2CT+QyuAcf6zUtDBkK//NZWCei9X yYhw== X-Gm-Message-State: AG10YOQGf3XjHCyamF0hT9ovpMngM0Af9EI2ole7XtzKBrra3ijTZclISHtquIVdrRfjMA== X-Received: by 10.31.151.11 with SMTP id z11mr13131833vkd.131.1453779818429; Mon, 25 Jan 2016 19:43:38 -0800 (PST) Received: from mail-vk0-f53.google.com (mail-vk0-f53.google.com. [209.85.213.53]) by smtp.gmail.com with ESMTPSA id x194sm2762864vkd.3.2016.01.25.19.43.37 for (version=TLSv1/SSLv3 cipher=OTHER); Mon, 25 Jan 2016 19:43:37 -0800 (PST) Received: by mail-vk0-f53.google.com with SMTP id e64so86058694vkg.0 for ; Mon, 25 Jan 2016 19:43:37 -0800 (PST) X-Received: by 10.31.149.78 with SMTP id x75mr13142411vkd.103.1453779817317; Mon, 25 Jan 2016 19:43:37 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Mon, 25 Jan 2016 19:43:18 -0800 (PST) From: Tim Cuthbertson Date: Tue, 26 Jan 2016 14:43:18 +1100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] atomically writing persistent data in mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi all, I've got a small HTTP service which runs both as a normal unix server which I've slowly been porting to work on mirage as well. One factor I haven't found a solution for yet is atomic FS operations. The unix version relies on Unix.rename being atomic - I don't have heavy storage needs, so I'm not worried about the performance of writing a new file then renaming over the old one atomically. To get things working with the existing code I implemented a crude `rename` for mirage's FS backend, but obviously it is not atomic: https://github.com/timbertson/passe/blob/a07ca8fe5a3a6fe0803df4765078749310c3df5c/src/mirage/unikernel.ml#L10 I believe that irmin does various things atomically, but my needs are simple enough that converting my simple, flat-file storage to use irmin as a backend instead seems like a lot of unnecessary work (and I really don't need branching or history). Does anyone know of a simple way to do persistent writes to the FS in mirage that ensure atomicity of written data? Peraps folks with knowledge of how irmin achieves atomicity can let me in on the base FS operations that it uses to do that? Just thinking about it without any particular knowledge of xen or the block storage, it seems like I could get away with three files for each real file: .ptr -> contents is just "a" or "b" .a .b Upon read, get the current "active" from .ptr then read that. Upon write, get the current active from .ptr, write to the _inactive_ file and then overwrite the byte in file.ptr to make it active. I'd protect file writes with a process-level lock (to make sure multiple writers don't conflict), which is sufficient for the mirage backend since there's no multi-process concerns. Would that work? Are single-byte writes guaranteed to be atomic in the FAT FS backend? Any better ideas? Cheers, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 26 03:43:53 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 26 Jan 2016 03:43:53 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aNuXe-0004nR-Te; Tue, 26 Jan 2016 03:43:42 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aNuXd-0004nM-6j for mirageos-devel@lists.xenproject.org; Tue, 26 Jan 2016 03:43:41 +0000 Received: from [85.158.137.68] by server-2.bemta-3.messagelabs.com id 56/16-21201-C6BE6A65; Tue, 26 Jan 2016 03:43:40 +0000 X-Env-Sender: tim@gfxmonk.net X-Msg-Ref: server-4.tower-31.messagelabs.com!1453779818!8453784!1 X-Originating-IP: [209.85.213.54] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 35719 invoked from network); 26 Jan 2016 03:43:39 -0000 Received: from mail-vk0-f54.google.com (HELO mail-vk0-f54.google.com) (209.85.213.54) by server-4.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 26 Jan 2016 03:43:39 -0000 Received: by mail-vk0-f54.google.com with SMTP id n1so85185237vkb.3 for ; Mon, 25 Jan 2016 19:43:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gfxmonk-net.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to:content-type; bh=rLqO/BC+2mn6ZxMJQ55zU9wyCKBfDMY0gTAYRvf9q8c=; b=jK0xVpA4Sr6MOVM9fKLjNpO/sEJL8YRGbc5dxkZqtw7h15HgzcA37D5Gel9hzDfZFX slKtwVd5sTuWPr0jmvefaWmABzUi3Wr5VPsFUhsp5q0jLmlhGgftGmTJjExBaYUP+dyr quNYM1k8xSGQZd7sFQmUsL694EsYA3B5zxQ1VJdUC5o8n9gRdhdUgMVFCYti6zgTd0sn j0yI9Ou1Y6k91lzppzwm25KaTnhbMsmTIxEnNTQeARIb14jv7/Pvj9vF3mimiYx2/tXX +J6nxV0wnH+p3bFtWsaoaW6bATGYXdU6YdgXGpNAq/BMOu4xPfR5ZGtm76mAK5hMeZUe RBeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:from:date:message-id:subject:to :content-type; bh=rLqO/BC+2mn6ZxMJQ55zU9wyCKBfDMY0gTAYRvf9q8c=; b=Vm36RbYp6sYunHG7ybRVtx5T0FiSWKMhrNMkTTzzTn+x1yIGu4JozCrD9MbtlWrXTQ s4HcgfkmjxLdzRHEVDGwNBjZQEEzd3ejkEcKFoO6P6sknCTsnTSH3e17Un2M70ZzxLRX jEwnSyYMc0VPqpcAAiOGJR8UIRXRTayAlJyCBNoIag1homTVkxqTL3+5CNxKAaubKAOV Nn9lV4ftBMYzVIhgMtiYrqmqTrSh3TKX/LTEa5C/JP5YwjMFXLm07ErRPXl/v13tr49n TLxQtQWxmSlci0r739oWw+rPBqaZ2TQX9lJ4IPYc2CT+QyuAcf6zUtDBkK//NZWCei9X yYhw== X-Gm-Message-State: AG10YOQGf3XjHCyamF0hT9ovpMngM0Af9EI2ole7XtzKBrra3ijTZclISHtquIVdrRfjMA== X-Received: by 10.31.151.11 with SMTP id z11mr13131833vkd.131.1453779818429; Mon, 25 Jan 2016 19:43:38 -0800 (PST) Received: from mail-vk0-f53.google.com (mail-vk0-f53.google.com. [209.85.213.53]) by smtp.gmail.com with ESMTPSA id x194sm2762864vkd.3.2016.01.25.19.43.37 for (version=TLSv1/SSLv3 cipher=OTHER); Mon, 25 Jan 2016 19:43:37 -0800 (PST) Received: by mail-vk0-f53.google.com with SMTP id e64so86058694vkg.0 for ; Mon, 25 Jan 2016 19:43:37 -0800 (PST) X-Received: by 10.31.149.78 with SMTP id x75mr13142411vkd.103.1453779817317; Mon, 25 Jan 2016 19:43:37 -0800 (PST) MIME-Version: 1.0 Received: by 10.31.69.132 with HTTP; Mon, 25 Jan 2016 19:43:18 -0800 (PST) From: Tim Cuthbertson Date: Tue, 26 Jan 2016 14:43:18 +1100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] atomically writing persistent data in mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi all, I've got a small HTTP service which runs both as a normal unix server which I've slowly been porting to work on mirage as well. One factor I haven't found a solution for yet is atomic FS operations. The unix version relies on Unix.rename being atomic - I don't have heavy storage needs, so I'm not worried about the performance of writing a new file then renaming over the old one atomically. To get things working with the existing code I implemented a crude `rename` for mirage's FS backend, but obviously it is not atomic: https://github.com/timbertson/passe/blob/a07ca8fe5a3a6fe0803df4765078749310c3df5c/src/mirage/unikernel.ml#L10 I believe that irmin does various things atomically, but my needs are simple enough that converting my simple, flat-file storage to use irmin as a backend instead seems like a lot of unnecessary work (and I really don't need branching or history). Does anyone know of a simple way to do persistent writes to the FS in mirage that ensure atomicity of written data? Peraps folks with knowledge of how irmin achieves atomicity can let me in on the base FS operations that it uses to do that? Just thinking about it without any particular knowledge of xen or the block storage, it seems like I could get away with three files for each real file: .ptr -> contents is just "a" or "b" .a .b Upon read, get the current "active" from .ptr then read that. Upon write, get the current active from .ptr, write to the _inactive_ file and then overwrite the byte in file.ptr to make it active. I'd protect file writes with a process-level lock (to make sure multiple writers don't conflict), which is sufficient for the mirage backend since there's no multi-process concerns. Would that work? Are single-byte writes guaranteed to be atomic in the FAT FS backend? Any better ideas? Cheers, - Tim. _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 26 10:01:45 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 26 Jan 2016 10:01:45 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aO0RN-0002xH-VQ; Tue, 26 Jan 2016 10:01:37 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aO0RM-0002xA-Nt for mirageos-devel@lists.xenproject.org; Tue, 26 Jan 2016 10:01:36 +0000 Received: from [193.109.254.147] by server-8.bemta-14.messagelabs.com id 13/65-24450-00447A65; Tue, 26 Jan 2016 10:01:36 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-13.tower-27.messagelabs.com!1453802494!19417644!1 X-Originating-IP: [209.85.213.43] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 57883 invoked from network); 26 Jan 2016 10:01:35 -0000 Received: from mail-vk0-f43.google.com (HELO mail-vk0-f43.google.com) (209.85.213.43) by server-13.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 26 Jan 2016 10:01:35 -0000 Received: by mail-vk0-f43.google.com with SMTP id e64so89515788vkg.0 for ; Tue, 26 Jan 2016 02:01:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=H30xeEAFGI0Q1fL7yqKck+qu7N3xHjBry3jSo57EZFw=; b=d6PC7X0zUKPrYK7GaBWAEotqqeXo5ZKNSxOjuH9pWHeBPX3GAWEV2ClRdNCLB8a+OE wW3KQha5aJDhsg5zTn0488hD3YW6cg1wOouhzTynwK27zBz2WZgiqcn2uipzUTrunsto tMOxupLhcbWEfBwq8AE0tO9hYUfKuupBcRBdeeprv7c1dqsGWIRxaa6n2vr5uT/ydtmg A2HfgbHUeFTxgPpch9cMynzuNc4m5QUpdnQEMfYyUtyGfBaKc0J17ItNMzfVdsho2KO7 S+JgeoldiVjnqjcxw0YzkAK8yqZILVVJQ6rXiywQeYVyJ9E5wt9h+SNyRknjVZWO6FRz iuag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=H30xeEAFGI0Q1fL7yqKck+qu7N3xHjBry3jSo57EZFw=; b=AGHCgPcTh+4BHnFWynJd3WgokxI03WhiVnCmsMmYRefgG22xBmNqo/NjO42BJaUQLc PiKj36zTTJcZB7qJu0vGsjKBJab7BqBLdGgyo8ynmVbMp7v4pl+4xokyxCerW89g/MHh MX6Q1K85GzEeWBmHfDq1+j04dOGNH6aeXUtRCPqJtFhC9sicb4gWREtCtnyXXEIpY55J Ox3eSjbJESMSLWMFfC6Qo3jBe4rPynU3rvJCjZG2kP0Oyuo1GjLzTfBAr1COUTi3nJ3Q 3kOKuTINzwx2LVWKkg60QRVF9iKLELSwENt+ygNyxkGAr6VZN5UJf5LuRS+PxZ6wprYI SWDA== X-Gm-Message-State: AG10YORAohLbZ6ktL1rIDSbTA9zZYETjM901uyBQ20GYShWJeknJXWgNHs9PKAdck9ODRpMtGhAgxR7R2mEAsg== MIME-Version: 1.0 X-Received: by 10.31.47.200 with SMTP id v191mr14826121vkv.116.1453802494058; Tue, 26 Jan 2016 02:01:34 -0800 (PST) Received: by 10.31.130.129 with HTTP; Tue, 26 Jan 2016 02:01:34 -0800 (PST) In-Reply-To: References: Date: Tue, 26 Jan 2016 10:01:34 +0000 Message-ID: From: Thomas Leonard To: Tim Cuthbertson Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] atomically writing persistent data in mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 26 January 2016 at 03:43, Tim Cuthbertson wrote: > Hi all, > > I've got a small HTTP service which runs both as a normal unix server > which I've slowly been porting to work on mirage as well. One factor I > haven't found a solution for yet is atomic FS operations. > > The unix version relies on Unix.rename being atomic - I don't have > heavy storage needs, so I'm not worried about the performance of > writing a new file then renaming over the old one atomically. To get > things working with the existing code I implemented a crude `rename` > for mirage's FS backend, but obviously it is not atomic: > > https://github.com/timbertson/passe/blob/a07ca8fe5a3a6fe0803df4765078749310c3df5c/src/mirage/unikernel.ml#L10 > > I believe that irmin does various things atomically, but my needs are > simple enough that converting my simple, flat-file storage to use > irmin as a backend instead seems like a lot of unnecessary work (and I > really don't need branching or history). > > Does anyone know of a simple way to do persistent writes to the FS in > mirage that ensure atomicity of written data? Peraps folks with > knowledge of how irmin achieves atomicity can let me in on the base FS > operations that it uses to do that? There are two separate things here: 1. Making operations appear atomic to the application (i.e. it will never see a half-written file). 2. Ensuring that if the system crashes and is restarted it will return to some state it had previously had. (1) is pretty easy in a Unikernel since you can just make everything go via your own wrapper, e.g. with a Lwt_mutex around it. (2) is hard... Irmin ensures (1), but relies on the FS layer for (2). On Unix, it uses POSIX atomic rename. I don't think we have Irmin persistence working on Xen yet (maybe someone hacked it up with FAT, but it probably wasn't robust against crashes if so). I believe the current plan is to get this finished and working: https://github.com/djs55/ocaml-btree Not sure how close it is to being ready. Perhaps Dave can comment... > Just thinking about it without any particular knowledge of xen or the > block storage, it seems like I could get away with three files for > each real file: > > .ptr -> contents is just "a" or "b" > .a > .b > > Upon read, get the current "active" from .ptr then read that. > Upon write, get the current active from .ptr, write to the > _inactive_ file and then overwrite the byte in file.ptr to make it > active. I'd protect file writes with a process-level lock (to make > sure multiple writers don't conflict), which is sufficient for the > mirage backend since there's no multi-process concerns. > > Would that work? Are single-byte writes guaranteed to be atomic in the > FAT FS backend? Any better ideas? I vaguely recall that the FAT code builds up a list of blocks to write and passes them all together to a function. You could perhaps write them to a journal partition first. I suspect that trying to build anything reliable on top of FAT is a lost cause however... -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 26 10:01:45 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 26 Jan 2016 10:01:45 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aO0RN-0002xH-VQ; Tue, 26 Jan 2016 10:01:37 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aO0RM-0002xA-Nt for mirageos-devel@lists.xenproject.org; Tue, 26 Jan 2016 10:01:36 +0000 Received: from [193.109.254.147] by server-8.bemta-14.messagelabs.com id 13/65-24450-00447A65; Tue, 26 Jan 2016 10:01:36 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-13.tower-27.messagelabs.com!1453802494!19417644!1 X-Originating-IP: [209.85.213.43] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 57883 invoked from network); 26 Jan 2016 10:01:35 -0000 Received: from mail-vk0-f43.google.com (HELO mail-vk0-f43.google.com) (209.85.213.43) by server-13.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 26 Jan 2016 10:01:35 -0000 Received: by mail-vk0-f43.google.com with SMTP id e64so89515788vkg.0 for ; Tue, 26 Jan 2016 02:01:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=H30xeEAFGI0Q1fL7yqKck+qu7N3xHjBry3jSo57EZFw=; b=d6PC7X0zUKPrYK7GaBWAEotqqeXo5ZKNSxOjuH9pWHeBPX3GAWEV2ClRdNCLB8a+OE wW3KQha5aJDhsg5zTn0488hD3YW6cg1wOouhzTynwK27zBz2WZgiqcn2uipzUTrunsto tMOxupLhcbWEfBwq8AE0tO9hYUfKuupBcRBdeeprv7c1dqsGWIRxaa6n2vr5uT/ydtmg A2HfgbHUeFTxgPpch9cMynzuNc4m5QUpdnQEMfYyUtyGfBaKc0J17ItNMzfVdsho2KO7 S+JgeoldiVjnqjcxw0YzkAK8yqZILVVJQ6rXiywQeYVyJ9E5wt9h+SNyRknjVZWO6FRz iuag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=H30xeEAFGI0Q1fL7yqKck+qu7N3xHjBry3jSo57EZFw=; b=AGHCgPcTh+4BHnFWynJd3WgokxI03WhiVnCmsMmYRefgG22xBmNqo/NjO42BJaUQLc PiKj36zTTJcZB7qJu0vGsjKBJab7BqBLdGgyo8ynmVbMp7v4pl+4xokyxCerW89g/MHh MX6Q1K85GzEeWBmHfDq1+j04dOGNH6aeXUtRCPqJtFhC9sicb4gWREtCtnyXXEIpY55J Ox3eSjbJESMSLWMFfC6Qo3jBe4rPynU3rvJCjZG2kP0Oyuo1GjLzTfBAr1COUTi3nJ3Q 3kOKuTINzwx2LVWKkg60QRVF9iKLELSwENt+ygNyxkGAr6VZN5UJf5LuRS+PxZ6wprYI SWDA== X-Gm-Message-State: AG10YORAohLbZ6ktL1rIDSbTA9zZYETjM901uyBQ20GYShWJeknJXWgNHs9PKAdck9ODRpMtGhAgxR7R2mEAsg== MIME-Version: 1.0 X-Received: by 10.31.47.200 with SMTP id v191mr14826121vkv.116.1453802494058; Tue, 26 Jan 2016 02:01:34 -0800 (PST) Received: by 10.31.130.129 with HTTP; Tue, 26 Jan 2016 02:01:34 -0800 (PST) In-Reply-To: References: Date: Tue, 26 Jan 2016 10:01:34 +0000 Message-ID: From: Thomas Leonard To: Tim Cuthbertson Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] atomically writing persistent data in mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 26 January 2016 at 03:43, Tim Cuthbertson wrote: > Hi all, > > I've got a small HTTP service which runs both as a normal unix server > which I've slowly been porting to work on mirage as well. One factor I > haven't found a solution for yet is atomic FS operations. > > The unix version relies on Unix.rename being atomic - I don't have > heavy storage needs, so I'm not worried about the performance of > writing a new file then renaming over the old one atomically. To get > things working with the existing code I implemented a crude `rename` > for mirage's FS backend, but obviously it is not atomic: > > https://github.com/timbertson/passe/blob/a07ca8fe5a3a6fe0803df4765078749310c3df5c/src/mirage/unikernel.ml#L10 > > I believe that irmin does various things atomically, but my needs are > simple enough that converting my simple, flat-file storage to use > irmin as a backend instead seems like a lot of unnecessary work (and I > really don't need branching or history). > > Does anyone know of a simple way to do persistent writes to the FS in > mirage that ensure atomicity of written data? Peraps folks with > knowledge of how irmin achieves atomicity can let me in on the base FS > operations that it uses to do that? There are two separate things here: 1. Making operations appear atomic to the application (i.e. it will never see a half-written file). 2. Ensuring that if the system crashes and is restarted it will return to some state it had previously had. (1) is pretty easy in a Unikernel since you can just make everything go via your own wrapper, e.g. with a Lwt_mutex around it. (2) is hard... Irmin ensures (1), but relies on the FS layer for (2). On Unix, it uses POSIX atomic rename. I don't think we have Irmin persistence working on Xen yet (maybe someone hacked it up with FAT, but it probably wasn't robust against crashes if so). I believe the current plan is to get this finished and working: https://github.com/djs55/ocaml-btree Not sure how close it is to being ready. Perhaps Dave can comment... > Just thinking about it without any particular knowledge of xen or the > block storage, it seems like I could get away with three files for > each real file: > > .ptr -> contents is just "a" or "b" > .a > .b > > Upon read, get the current "active" from .ptr then read that. > Upon write, get the current active from .ptr, write to the > _inactive_ file and then overwrite the byte in file.ptr to make it > active. I'd protect file writes with a process-level lock (to make > sure multiple writers don't conflict), which is sufficient for the > mirage backend since there's no multi-process concerns. > > Would that work? Are single-byte writes guaranteed to be atomic in the > FAT FS backend? Any better ideas? I vaguely recall that the FAT code builds up a list of blocks to write and passes them all together to a function. You could perhaps write them to a journal partition first. I suspect that trying to build anything reliable on top of FAT is a lost cause however... -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Tue Jan 26 14:59:37 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 26 Jan 2016 14:59:37 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aO55a-00066W-7d; Tue, 26 Jan 2016 14:59:26 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aO55Y-00066K-PM for mirageos-devel@lists.xenproject.org; Tue, 26 Jan 2016 14:59:24 +0000 Received: from [193.109.254.147] by server-15.bemta-14.messagelabs.com id 49/9E-10115-CC987A65; Tue, 26 Jan 2016 14:59:24 +0000 X-Env-Sender: scott.dj@gmail.com X-Msg-Ref: server-8.tower-27.messagelabs.com!1453820362!15739973!1 X-Originating-IP: [74.125.82.51] X-SpamReason: No, hits=0.4 required=7.0 tests=HTML_30_40,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 27303 invoked from network); 26 Jan 2016 14:59:22 -0000 Received: from mail-wm0-f51.google.com (HELO mail-wm0-f51.google.com) (74.125.82.51) by server-8.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 26 Jan 2016 14:59:22 -0000 Received: by mail-wm0-f51.google.com with SMTP id u188so109830007wmu.1 for ; Tue, 26 Jan 2016 06:59:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=jOk7QuJrV2SLTvlZEXuajTvEFgX9UHom945yGlKGQYM=; b=JsPn66jCVOctQIBSFRacoJPE8zPA4yjaneaHI3MLOtHdTCcl83sDYQ9vY05SQIfo3y g4OefI/VWDCfDHS+3Nm67Vb3+el70x+U1rip8KcmbnmyIhhfBXHwQvHflrDYULyuX/vd buay2gWBXIxp0gxa3A74GOnNdTJmDazYjxiXDBm3tLN9W2uqrfAtn9XPjntcOnJFxWpF FBPbDEdjARaVLDBl10gQWNZntF33OoH3sKvONhBkLDyes03o1dl0QNHTEYpG2Y3Pc485 r8cUPkNmcoVMCT2C0brPoKQ56d6VTXz/tdpIbEvEh/NSEkFGV1hil9Tr4WT/OBAURdFj GR8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=jOk7QuJrV2SLTvlZEXuajTvEFgX9UHom945yGlKGQYM=; b=lezGe9MvqgAaQkYiWwTuy9gpjCz5i5x0dJmy69PIuJaa5N7UCCeCc1FaJymkPnjIih O98P+B/rbmZQwJuAqKzarBoOh/rO4UA3GNLkJk48HEsQorfrr6uTZeJqke195Q59AeFQ Lr4uj3Q3uyJxQv/2FMcpV9GHL/vi9SRrCGpOFLZps5TJnjJA9VtZoGcoxB/doPgcVsZs oCyNnqkzXLKPkrJAcRPCBDxIIkAf8DlAfpgQWFMV/4PAR5R54HRToHweUrycNHmWmhU5 ugn1H4+/TDqah3bq4cJBhn2DGmPHLcHow/UEyvNUsYjP3FxENbfBbTCChUvU3Kl1HfgG xTMQ== X-Gm-Message-State: AG10YOSKAT7RmOqVCCeiT1TDzxvZhmLJfl3g1gNqmrs4j3Wjl8sIJPEx+kb8UL+wGCZ+LQkAqkdZ/h9AkbWGLQ== MIME-Version: 1.0 X-Received: by 10.194.20.67 with SMTP id l3mr22725951wje.86.1453820361804; Tue, 26 Jan 2016 06:59:21 -0800 (PST) Received: by 10.28.137.2 with HTTP; Tue, 26 Jan 2016 06:59:21 -0800 (PST) In-Reply-To: References: Date: Tue, 26 Jan 2016 14:59:21 +0000 Message-ID: From: David Scott To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] atomically writing persistent data in mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1495113377472751123==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============1495113377472751123== Content-Type: multipart/alternative; boundary=047d7b5d649a3b9d94052a3dee7f --047d7b5d649a3b9d94052a3dee7f Content-Type: text/plain; charset=UTF-8 On Tue, Jan 26, 2016 at 10:01 AM, Thomas Leonard wrote: > On 26 January 2016 at 03:43, Tim Cuthbertson wrote: > > Hi all, > > > > I've got a small HTTP service which runs both as a normal unix server > > which I've slowly been porting to work on mirage as well. One factor I > > haven't found a solution for yet is atomic FS operations. > > > > The unix version relies on Unix.rename being atomic - I don't have > > heavy storage needs, so I'm not worried about the performance of > > writing a new file then renaming over the old one atomically. To get > > things working with the existing code I implemented a crude `rename` > > for mirage's FS backend, but obviously it is not atomic: > > > > > https://github.com/timbertson/passe/blob/a07ca8fe5a3a6fe0803df4765078749310c3df5c/src/mirage/unikernel.ml#L10 > > > > I believe that irmin does various things atomically, but my needs are > > simple enough that converting my simple, flat-file storage to use > > irmin as a backend instead seems like a lot of unnecessary work (and I > > really don't need branching or history). > > > > Does anyone know of a simple way to do persistent writes to the FS in > > mirage that ensure atomicity of written data? Peraps folks with > > knowledge of how irmin achieves atomicity can let me in on the base FS > > operations that it uses to do that? > > There are two separate things here: > > 1. Making operations appear atomic to the application (i.e. it will > never see a half-written file). > > 2. Ensuring that if the system crashes and is restarted it will return > to some state it had previously had. > > (1) is pretty easy in a Unikernel since you can just make everything > go via your own wrapper, e.g. with a Lwt_mutex around it. (2) is > hard... > > Irmin ensures (1), but relies on the FS layer for (2). On Unix, it > uses POSIX atomic rename. I don't think we have Irmin persistence > working on Xen yet (maybe someone hacked it up with FAT, but it > probably wasn't robust against crashes if so). > > I believe the current plan is to get this finished and working: > > https://github.com/djs55/ocaml-btree > > Not sure how close it is to being ready. Perhaps Dave can comment... > It's not ready for use yet unfortunately :( Realistically it'll take a couple of months (unless I suddenly find an excuse to spend more of my time on it). I'm hoping that an update will consist of constructing a new tree on disk sharing as many nodes as possible with the current tree (wrapped by a mutex to guarantee (1)) and then flipping the root pointer in an atomic sector write to guarantee (2). I need to make sure blocks don't leak and can be efficiently GCed too. None of this is fully implemented yet. Cheers, Dave > > Just thinking about it without any particular knowledge of xen or the > > block storage, it seems like I could get away with three files for > > each real file: > > > > .ptr -> contents is just "a" or "b" > > .a > > .b > > > > Upon read, get the current "active" from .ptr then read that. > > Upon write, get the current active from .ptr, write to the > > _inactive_ file and then overwrite the byte in file.ptr to make it > > active. I'd protect file writes with a process-level lock (to make > > sure multiple writers don't conflict), which is sufficient for the > > mirage backend since there's no multi-process concerns. > > > > Would that work? Are single-byte writes guaranteed to be atomic in the > > FAT FS backend? Any better ideas? > > I vaguely recall that the FAT code builds up a list of blocks to write > and passes them all together to a function. You could perhaps write > them to a journal partition first. I suspect that trying to build > anything reliable on top of FAT is a lost cause however... > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --047d7b5d649a3b9d94052a3dee7f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Tue, Jan 26, 2016 at 10:01 AM, Thomas Leonard <= talex5@gmail.com&= gt; wrote:
On 26 = January 2016 at 03:43, Tim Cuthbertson <tim@gfxmonk.net> wrote:
> Hi all,
>
> I've got a small HTTP service which runs both as a normal unix ser= ver
> which I've slowly been porting to work on mirage as well. One fact= or I
> haven't found a solution for yet is atomic FS operations.
>
> The unix version relies on Unix.rename being atomic - I don't have=
> heavy storage needs, so I'm not worried about the performance of > writing a new file then renaming over the old one atomically. To get > things working with the existing code I implemented a crude `rename` > for mirage's FS backend, but obviously it is not atomic:
>
> https://github.com/timbertson/passe/blob/a07ca8fe5a3a6fe0803d= f4765078749310c3df5c/src/mirage/unikernel.ml#L10
>
> I believe that irmin does various things atomically, but my needs are<= br> > simple enough that converting my simple, flat-file storage to use
> irmin as a backend instead seems like a lot of unnecessary work (and I=
> really don't need branching or history).
>
> Does anyone know of a simple way to do persistent writes to the FS in<= br> > mirage that ensure atomicity of written data? Peraps folks with
> knowledge of how irmin achieves atomicity can let me in on the base FS=
> operations that it uses to do that?

There are two separate things here:

1. Making operations appear atomic to the application (i.e. it will
never see a half-written file).

2. Ensuring that if the system crashes and is restarted it will return
to some state it had previously had.

(1) is pretty easy in a Unikernel since you can just make everything
go via your own wrapper, e.g. with a Lwt_mutex around it. (2) is
hard...

Irmin ensures (1), but relies on the FS layer for (2). On Unix, it
uses POSIX atomic rename. I don't think we have Irmin persistence
working on Xen yet (maybe someone hacked it up with FAT, but it
probably wasn't robust against crashes if so).

I believe the current plan is to get this finished and working:

=C2=A0 https://github.com/djs55/ocaml-btree

Not sure how close it is to being ready. Perhaps Dave can comment...

It's not ready for use yet unfortunately = :( Realistically it'll take a couple of months (unless I suddenly find = an excuse to spend more of my time on it).

I'm= hoping that an update will consist of constructing a new tree on disk shar= ing as many nodes as possible with the current tree (wrapped by a mutex to = guarantee (1)) and then flipping the root pointer in an atomic sector write= to guarantee (2). I need to make sure blocks don't leak and can be eff= iciently GCed too. None of this is fully implemented yet.
Cheers,
Dave


> Just thinking about it without any particular knowledge of xen or the<= br> > block storage, it seems like I could get away with three files for
> each real file:
>
> <file>.ptr -> contents is just "a" or "b"=
> <file>.a
> <file>.b
>
> Upon read, get the current "active" from <file>.ptr th= en read that.
> Upon write, get the current active from <file>.ptr, write to the=
> _inactive_ file and then overwrite the byte in file.ptr to make it
> active. I'd protect file writes with a process-level lock (to make=
> sure multiple writers don't conflict), which is sufficient for the=
> mirage backend since there's no multi-process concerns.
>
> Would that work? Are single-byte writes guaranteed to be atomic in the=
> FAT FS backend? Any better ideas?

I vaguely recall that the FAT code builds up a list of blocks to wri= te
and passes them all together to a function. You could perhaps write
them to a journal partition first. I suspect that trying to build
anything reliable on top of FAT is a lost cause however...


--
Dr Thomas Leonard=C2=A0 =C2=A0 =C2=A0 =C2=A0 http://roscidus.com/blog/<= br> GPG: DA98 25AE CAD0 8975 7CDA=C2=A0 BD8E 0713 3F96 CA74 D8BA

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
http://lists.xenproject.org/cgi-b= in/mailman/listinfo/mirageos-devel



--
=
Dave Scott
--047d7b5d649a3b9d94052a3dee7f-- --===============1495113377472751123== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============1495113377472751123==-- From mirageos-devel-bounces@lists.xenproject.org Tue Jan 26 14:59:37 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 26 Jan 2016 14:59:37 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aO55a-00066W-7d; Tue, 26 Jan 2016 14:59:26 +0000 Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aO55Y-00066K-PM for mirageos-devel@lists.xenproject.org; Tue, 26 Jan 2016 14:59:24 +0000 Received: from [193.109.254.147] by server-15.bemta-14.messagelabs.com id 49/9E-10115-CC987A65; Tue, 26 Jan 2016 14:59:24 +0000 X-Env-Sender: scott.dj@gmail.com X-Msg-Ref: server-8.tower-27.messagelabs.com!1453820362!15739973!1 X-Originating-IP: [74.125.82.51] X-SpamReason: No, hits=0.4 required=7.0 tests=HTML_30_40,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 27303 invoked from network); 26 Jan 2016 14:59:22 -0000 Received: from mail-wm0-f51.google.com (HELO mail-wm0-f51.google.com) (74.125.82.51) by server-8.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 26 Jan 2016 14:59:22 -0000 Received: by mail-wm0-f51.google.com with SMTP id u188so109830007wmu.1 for ; Tue, 26 Jan 2016 06:59:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=jOk7QuJrV2SLTvlZEXuajTvEFgX9UHom945yGlKGQYM=; b=JsPn66jCVOctQIBSFRacoJPE8zPA4yjaneaHI3MLOtHdTCcl83sDYQ9vY05SQIfo3y g4OefI/VWDCfDHS+3Nm67Vb3+el70x+U1rip8KcmbnmyIhhfBXHwQvHflrDYULyuX/vd buay2gWBXIxp0gxa3A74GOnNdTJmDazYjxiXDBm3tLN9W2uqrfAtn9XPjntcOnJFxWpF FBPbDEdjARaVLDBl10gQWNZntF33OoH3sKvONhBkLDyes03o1dl0QNHTEYpG2Y3Pc485 r8cUPkNmcoVMCT2C0brPoKQ56d6VTXz/tdpIbEvEh/NSEkFGV1hil9Tr4WT/OBAURdFj GR8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=jOk7QuJrV2SLTvlZEXuajTvEFgX9UHom945yGlKGQYM=; b=lezGe9MvqgAaQkYiWwTuy9gpjCz5i5x0dJmy69PIuJaa5N7UCCeCc1FaJymkPnjIih O98P+B/rbmZQwJuAqKzarBoOh/rO4UA3GNLkJk48HEsQorfrr6uTZeJqke195Q59AeFQ Lr4uj3Q3uyJxQv/2FMcpV9GHL/vi9SRrCGpOFLZps5TJnjJA9VtZoGcoxB/doPgcVsZs oCyNnqkzXLKPkrJAcRPCBDxIIkAf8DlAfpgQWFMV/4PAR5R54HRToHweUrycNHmWmhU5 ugn1H4+/TDqah3bq4cJBhn2DGmPHLcHow/UEyvNUsYjP3FxENbfBbTCChUvU3Kl1HfgG xTMQ== X-Gm-Message-State: AG10YOSKAT7RmOqVCCeiT1TDzxvZhmLJfl3g1gNqmrs4j3Wjl8sIJPEx+kb8UL+wGCZ+LQkAqkdZ/h9AkbWGLQ== MIME-Version: 1.0 X-Received: by 10.194.20.67 with SMTP id l3mr22725951wje.86.1453820361804; Tue, 26 Jan 2016 06:59:21 -0800 (PST) Received: by 10.28.137.2 with HTTP; Tue, 26 Jan 2016 06:59:21 -0800 (PST) In-Reply-To: References: Date: Tue, 26 Jan 2016 14:59:21 +0000 Message-ID: From: David Scott To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] atomically writing persistent data in mirage X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1495113377472751123==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============1495113377472751123== Content-Type: multipart/alternative; boundary=047d7b5d649a3b9d94052a3dee7f --047d7b5d649a3b9d94052a3dee7f Content-Type: text/plain; charset=UTF-8 On Tue, Jan 26, 2016 at 10:01 AM, Thomas Leonard wrote: > On 26 January 2016 at 03:43, Tim Cuthbertson wrote: > > Hi all, > > > > I've got a small HTTP service which runs both as a normal unix server > > which I've slowly been porting to work on mirage as well. One factor I > > haven't found a solution for yet is atomic FS operations. > > > > The unix version relies on Unix.rename being atomic - I don't have > > heavy storage needs, so I'm not worried about the performance of > > writing a new file then renaming over the old one atomically. To get > > things working with the existing code I implemented a crude `rename` > > for mirage's FS backend, but obviously it is not atomic: > > > > > https://github.com/timbertson/passe/blob/a07ca8fe5a3a6fe0803df4765078749310c3df5c/src/mirage/unikernel.ml#L10 > > > > I believe that irmin does various things atomically, but my needs are > > simple enough that converting my simple, flat-file storage to use > > irmin as a backend instead seems like a lot of unnecessary work (and I > > really don't need branching or history). > > > > Does anyone know of a simple way to do persistent writes to the FS in > > mirage that ensure atomicity of written data? Peraps folks with > > knowledge of how irmin achieves atomicity can let me in on the base FS > > operations that it uses to do that? > > There are two separate things here: > > 1. Making operations appear atomic to the application (i.e. it will > never see a half-written file). > > 2. Ensuring that if the system crashes and is restarted it will return > to some state it had previously had. > > (1) is pretty easy in a Unikernel since you can just make everything > go via your own wrapper, e.g. with a Lwt_mutex around it. (2) is > hard... > > Irmin ensures (1), but relies on the FS layer for (2). On Unix, it > uses POSIX atomic rename. I don't think we have Irmin persistence > working on Xen yet (maybe someone hacked it up with FAT, but it > probably wasn't robust against crashes if so). > > I believe the current plan is to get this finished and working: > > https://github.com/djs55/ocaml-btree > > Not sure how close it is to being ready. Perhaps Dave can comment... > It's not ready for use yet unfortunately :( Realistically it'll take a couple of months (unless I suddenly find an excuse to spend more of my time on it). I'm hoping that an update will consist of constructing a new tree on disk sharing as many nodes as possible with the current tree (wrapped by a mutex to guarantee (1)) and then flipping the root pointer in an atomic sector write to guarantee (2). I need to make sure blocks don't leak and can be efficiently GCed too. None of this is fully implemented yet. Cheers, Dave > > Just thinking about it without any particular knowledge of xen or the > > block storage, it seems like I could get away with three files for > > each real file: > > > > .ptr -> contents is just "a" or "b" > > .a > > .b > > > > Upon read, get the current "active" from .ptr then read that. > > Upon write, get the current active from .ptr, write to the > > _inactive_ file and then overwrite the byte in file.ptr to make it > > active. I'd protect file writes with a process-level lock (to make > > sure multiple writers don't conflict), which is sufficient for the > > mirage backend since there's no multi-process concerns. > > > > Would that work? Are single-byte writes guaranteed to be atomic in the > > FAT FS backend? Any better ideas? > > I vaguely recall that the FAT code builds up a list of blocks to write > and passes them all together to a function. You could perhaps write > them to a journal partition first. I suspect that trying to build > anything reliable on top of FAT is a lost cause however... > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --047d7b5d649a3b9d94052a3dee7f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Tue, Jan 26, 2016 at 10:01 AM, Thomas Leonard <= talex5@gmail.com&= gt; wrote:
On 26 = January 2016 at 03:43, Tim Cuthbertson <tim@gfxmonk.net> wrote:
> Hi all,
>
> I've got a small HTTP service which runs both as a normal unix ser= ver
> which I've slowly been porting to work on mirage as well. One fact= or I
> haven't found a solution for yet is atomic FS operations.
>
> The unix version relies on Unix.rename being atomic - I don't have=
> heavy storage needs, so I'm not worried about the performance of > writing a new file then renaming over the old one atomically. To get > things working with the existing code I implemented a crude `rename` > for mirage's FS backend, but obviously it is not atomic:
>
> https://github.com/timbertson/passe/blob/a07ca8fe5a3a6fe0803d= f4765078749310c3df5c/src/mirage/unikernel.ml#L10
>
> I believe that irmin does various things atomically, but my needs are<= br> > simple enough that converting my simple, flat-file storage to use
> irmin as a backend instead seems like a lot of unnecessary work (and I=
> really don't need branching or history).
>
> Does anyone know of a simple way to do persistent writes to the FS in<= br> > mirage that ensure atomicity of written data? Peraps folks with
> knowledge of how irmin achieves atomicity can let me in on the base FS=
> operations that it uses to do that?

There are two separate things here:

1. Making operations appear atomic to the application (i.e. it will
never see a half-written file).

2. Ensuring that if the system crashes and is restarted it will return
to some state it had previously had.

(1) is pretty easy in a Unikernel since you can just make everything
go via your own wrapper, e.g. with a Lwt_mutex around it. (2) is
hard...

Irmin ensures (1), but relies on the FS layer for (2). On Unix, it
uses POSIX atomic rename. I don't think we have Irmin persistence
working on Xen yet (maybe someone hacked it up with FAT, but it
probably wasn't robust against crashes if so).

I believe the current plan is to get this finished and working:

=C2=A0 https://github.com/djs55/ocaml-btree

Not sure how close it is to being ready. Perhaps Dave can comment...

It's not ready for use yet unfortunately = :( Realistically it'll take a couple of months (unless I suddenly find = an excuse to spend more of my time on it).

I'm= hoping that an update will consist of constructing a new tree on disk shar= ing as many nodes as possible with the current tree (wrapped by a mutex to = guarantee (1)) and then flipping the root pointer in an atomic sector write= to guarantee (2). I need to make sure blocks don't leak and can be eff= iciently GCed too. None of this is fully implemented yet.
Cheers,
Dave


> Just thinking about it without any particular knowledge of xen or the<= br> > block storage, it seems like I could get away with three files for
> each real file:
>
> <file>.ptr -> contents is just "a" or "b"=
> <file>.a
> <file>.b
>
> Upon read, get the current "active" from <file>.ptr th= en read that.
> Upon write, get the current active from <file>.ptr, write to the=
> _inactive_ file and then overwrite the byte in file.ptr to make it
> active. I'd protect file writes with a process-level lock (to make=
> sure multiple writers don't conflict), which is sufficient for the=
> mirage backend since there's no multi-process concerns.
>
> Would that work? Are single-byte writes guaranteed to be atomic in the=
> FAT FS backend? Any better ideas?

I vaguely recall that the FAT code builds up a list of blocks to wri= te
and passes them all together to a function. You could perhaps write
them to a journal partition first. I suspect that trying to build
anything reliable on top of FAT is a lost cause however...


--
Dr Thomas Leonard=C2=A0 =C2=A0 =C2=A0 =C2=A0 http://roscidus.com/blog/<= br> GPG: DA98 25AE CAD0 8975 7CDA=C2=A0 BD8E 0713 3F96 CA74 D8BA

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
http://lists.xenproject.org/cgi-b= in/mailman/listinfo/mirageos-devel



--
=
Dave Scott
--047d7b5d649a3b9d94052a3dee7f-- --===============1495113377472751123== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============1495113377472751123==-- From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:03:22 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:03:22 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSYo-0002zC-6Z; Wed, 27 Jan 2016 16:03:10 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSYm-0002yw-HW for mirageos-devel@lists.xenproject.org; Wed, 27 Jan 2016 16:03:08 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 93/56-08977-B3AE8A65; Wed, 27 Jan 2016 16:03:07 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-7.tower-21.messagelabs.com!1453910561!12589068!1 X-Originating-IP: [209.85.213.48] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 21417 invoked from network); 27 Jan 2016 16:03:07 -0000 Received: from mail-vk0-f48.google.com (HELO mail-vk0-f48.google.com) (209.85.213.48) by server-7.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 27 Jan 2016 16:03:07 -0000 Received: by mail-vk0-f48.google.com with SMTP id e185so7409198vkb.1 for ; Wed, 27 Jan 2016 08:03:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=vVSJFdbZopWGly4ZYay7DYDoD/QRci5C7uSBEaAiVns=; b=Wt9Yx7S4FdZrwe/ws5+ryopK7u7m4AV/9Og3+H5HByj5n2wfEDbG5db+/O2K4ykS5h oT4GHqzt6+XaECEiMdyrG//ga3/TgZ/k3E2ZbrJfn4I1nMuzgM+cIRUKNl/+UWhqTAO9 5qUVYL9bFb/HQdclYWqR1fhpvPU+0Fs/zeXgkiAOXYBT0kUCqNiFb3h9cU9wlOICr10Y OVE8QPdZP8RHwkbkFZuLVhEhvfb6dxXWDtKhdrgOqSich1+3av3OfeyojMyOdv+f9FWJ tvZd1dmrGdgh3mV8zmiAfwf3FSTTTFVtRTGdU3tmeJIYf2XouHsgGDS3BSjMfqokMecg P8bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=vVSJFdbZopWGly4ZYay7DYDoD/QRci5C7uSBEaAiVns=; b=EI7doICi1lbc4ie2vStC+NlHpZN0J6vPzXsBnRDzX7W7iLVUzcyL1G5yBXw9xiIBBg b8YxYHM6j2wqxynz1rfu43UkOUncPHZbjWoYx+jbMufcBVncjcYNbub6YRkentefDDbn KnOrPXQAC9CzrAEnPWCxgsBam3PrpjkdWy0bLGV7BsT6duWuZ9gAY3iHYiZCQCCbS7Fb B7BWpXEyOHt5CpJAhnNN71B0NFc3JsSQr+o1Gax6dqa+gD7DFBqlWklgDBlcg171Hxb6 3iRLFmx2c+k9tr26PqweMX+NNc2ZtREyAfb7DqO0ChxGbcCLrl84XTr7PnvZqHuXQNe/ CSew== X-Gm-Message-State: AG10YORIEOi6P0hAICBcTnLzuPwBXJRo/g8g/OPPiel/saHNrf+9CjjKVd1yqtSlb+vOdX6QDzBO0zo590a+AA== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr18993660vki.41.1453910557974; Wed, 27 Jan 2016 08:02:37 -0800 (PST) Received: by 10.31.130.129 with HTTP; Wed, 27 Jan 2016 08:02:37 -0800 (PST) Date: Wed, 27 Jan 2016 16:02:37 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] MirageOS fortnightly call X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Does anyone know if this week's call is happening? I thought Amir mentioned that he wanted to move it back by a week, but I haven't heard anything. Will assume it's not happening unless someone posts to say it is... -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:03:22 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:03:22 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSYo-0002zC-6Z; Wed, 27 Jan 2016 16:03:10 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSYm-0002yw-HW for mirageos-devel@lists.xenproject.org; Wed, 27 Jan 2016 16:03:08 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 93/56-08977-B3AE8A65; Wed, 27 Jan 2016 16:03:07 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-7.tower-21.messagelabs.com!1453910561!12589068!1 X-Originating-IP: [209.85.213.48] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 21417 invoked from network); 27 Jan 2016 16:03:07 -0000 Received: from mail-vk0-f48.google.com (HELO mail-vk0-f48.google.com) (209.85.213.48) by server-7.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 27 Jan 2016 16:03:07 -0000 Received: by mail-vk0-f48.google.com with SMTP id e185so7409198vkb.1 for ; Wed, 27 Jan 2016 08:03:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=vVSJFdbZopWGly4ZYay7DYDoD/QRci5C7uSBEaAiVns=; b=Wt9Yx7S4FdZrwe/ws5+ryopK7u7m4AV/9Og3+H5HByj5n2wfEDbG5db+/O2K4ykS5h oT4GHqzt6+XaECEiMdyrG//ga3/TgZ/k3E2ZbrJfn4I1nMuzgM+cIRUKNl/+UWhqTAO9 5qUVYL9bFb/HQdclYWqR1fhpvPU+0Fs/zeXgkiAOXYBT0kUCqNiFb3h9cU9wlOICr10Y OVE8QPdZP8RHwkbkFZuLVhEhvfb6dxXWDtKhdrgOqSich1+3av3OfeyojMyOdv+f9FWJ tvZd1dmrGdgh3mV8zmiAfwf3FSTTTFVtRTGdU3tmeJIYf2XouHsgGDS3BSjMfqokMecg P8bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=vVSJFdbZopWGly4ZYay7DYDoD/QRci5C7uSBEaAiVns=; b=EI7doICi1lbc4ie2vStC+NlHpZN0J6vPzXsBnRDzX7W7iLVUzcyL1G5yBXw9xiIBBg b8YxYHM6j2wqxynz1rfu43UkOUncPHZbjWoYx+jbMufcBVncjcYNbub6YRkentefDDbn KnOrPXQAC9CzrAEnPWCxgsBam3PrpjkdWy0bLGV7BsT6duWuZ9gAY3iHYiZCQCCbS7Fb B7BWpXEyOHt5CpJAhnNN71B0NFc3JsSQr+o1Gax6dqa+gD7DFBqlWklgDBlcg171Hxb6 3iRLFmx2c+k9tr26PqweMX+NNc2ZtREyAfb7DqO0ChxGbcCLrl84XTr7PnvZqHuXQNe/ CSew== X-Gm-Message-State: AG10YORIEOi6P0hAICBcTnLzuPwBXJRo/g8g/OPPiel/saHNrf+9CjjKVd1yqtSlb+vOdX6QDzBO0zo590a+AA== MIME-Version: 1.0 X-Received: by 10.31.16.101 with SMTP id g98mr18993660vki.41.1453910557974; Wed, 27 Jan 2016 08:02:37 -0800 (PST) Received: by 10.31.130.129 with HTTP; Wed, 27 Jan 2016 08:02:37 -0800 (PST) Date: Wed, 27 Jan 2016 16:02:37 +0000 Message-ID: From: Thomas Leonard To: "mirageos-devel@lists.xenproject.org" Subject: [MirageOS-devel] MirageOS fortnightly call X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Does anyone know if this week's call is happening? I thought Amir mentioned that he wanted to move it back by a week, but I haven't heard anything. Will assume it's not happening unless someone posts to say it is... -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:13:26 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:13:26 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSii-0004WA-Lw; Wed, 27 Jan 2016 16:13:24 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSig-0004W3-KP for mirageos-devel@lists.xenproject.org; Wed, 27 Jan 2016 16:13:22 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 58/45-08977-1ACE8A65; Wed, 27 Jan 2016 16:13:21 +0000 X-Env-Sender: amc79@cam.ac.uk X-Msg-Ref: server-15.tower-21.messagelabs.com!1453911164!12457459!1 X-Originating-IP: [131.111.8.132] X-SpamReason: No, hits=0.2 required=7.0 tests=MIME_QP_LONG_LINE X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 9077 invoked from network); 27 Jan 2016 16:13:21 -0000 Received: from ppsw-32.csi.cam.ac.uk (HELO ppsw-32.csi.cam.ac.uk) (131.111.8.132) by server-15.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 27 Jan 2016 16:13:21 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from [172.58.104.43] (port=22026 helo=[172.20.10.10]) by ppsw-32.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.156]:587) with esmtpsa (PLAIN:amc79) (TLSv1:ECDHE-RSA-AES256-SHA:256) id 1aOSi0-000s6x-1A (Exim 4.86_36-e07b163) (return-path ); Wed, 27 Jan 2016 16:12:41 +0000 Mime-Version: 1.0 (1.0) From: Amir Chaudhry X-Mailer: iPhone Mail (13D14) In-Reply-To: Date: Wed, 27 Jan 2016 08:12:26 -0800 Message-Id: References: To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] MirageOS fortnightly call X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org My apologies! I did move the call back by a week and forgot to mention it on this list. We'll be back to the regular cadence from next Wednesday (3rd Feb). Best wishes, Amir -- Sent via mobile > On 27 Jan 2016, at 08:02, Thomas Leonard wrote: > > Does anyone know if this week's call is happening? I thought Amir > mentioned that he wanted to move it back by a week, but I haven't > heard anything. Will assume it's not happening unless someone posts to > say it is... > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:13:26 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:13:26 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSii-0004WA-Lw; Wed, 27 Jan 2016 16:13:24 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSig-0004W3-KP for mirageos-devel@lists.xenproject.org; Wed, 27 Jan 2016 16:13:22 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 58/45-08977-1ACE8A65; Wed, 27 Jan 2016 16:13:21 +0000 X-Env-Sender: amc79@cam.ac.uk X-Msg-Ref: server-15.tower-21.messagelabs.com!1453911164!12457459!1 X-Originating-IP: [131.111.8.132] X-SpamReason: No, hits=0.2 required=7.0 tests=MIME_QP_LONG_LINE X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 9077 invoked from network); 27 Jan 2016 16:13:21 -0000 Received: from ppsw-32.csi.cam.ac.uk (HELO ppsw-32.csi.cam.ac.uk) (131.111.8.132) by server-15.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 27 Jan 2016 16:13:21 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from [172.58.104.43] (port=22026 helo=[172.20.10.10]) by ppsw-32.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.156]:587) with esmtpsa (PLAIN:amc79) (TLSv1:ECDHE-RSA-AES256-SHA:256) id 1aOSi0-000s6x-1A (Exim 4.86_36-e07b163) (return-path ); Wed, 27 Jan 2016 16:12:41 +0000 Mime-Version: 1.0 (1.0) From: Amir Chaudhry X-Mailer: iPhone Mail (13D14) In-Reply-To: Date: Wed, 27 Jan 2016 08:12:26 -0800 Message-Id: References: To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] MirageOS fortnightly call X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org My apologies! I did move the call back by a week and forgot to mention it on this list. We'll be back to the regular cadence from next Wednesday (3rd Feb). Best wishes, Amir -- Sent via mobile > On 27 Jan 2016, at 08:02, Thomas Leonard wrote: > > Does anyone know if this week's call is happening? I thought Amir > mentioned that he wanted to move it back by a week, but I haven't > heard anything. Will assume it's not happening unless someone posts to > say it is... > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:28:10 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:28:10 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSwz-0006Hg-0v; Wed, 27 Jan 2016 16:28:09 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSwy-0006Hb-71 for mirageos-devel@lists.xenproject.org; Wed, 27 Jan 2016 16:28:08 +0000 Received: from [85.158.139.211] by server-10.bemta-5.messagelabs.com id 05/F3-17090-710F8A65; Wed, 27 Jan 2016 16:28:07 +0000 X-Env-Sender: cosmokramer@gmail.com X-Msg-Ref: server-5.tower-206.messagelabs.com!1453912086!18533134!1 X-Originating-IP: [74.125.82.53] X-SpamReason: No, hits=1.2 required=7.0 tests=HTML_20_30,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 1150 invoked from network); 27 Jan 2016 16:28:06 -0000 Received: from mail-wm0-f53.google.com (HELO mail-wm0-f53.google.com) (74.125.82.53) by server-5.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 27 Jan 2016 16:28:06 -0000 Received: by mail-wm0-f53.google.com with SMTP id n5so36629744wmn.1 for ; Wed, 27 Jan 2016 08:28:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=Ndv3ogCnfWyn9IVwEAtOE3LjzxevMahs7qFUVMtPAFE=; b=KVSpXLwfFQwUkpmZTOw2sz0o/m3MfZ6rkXLpkmCZLIhGWT12k8fCktVUYYxsgWgylB GepGbjkbuW/jRNRW8SwpnRS41ZclR+/LqoiOTd6d/Qua41A2NOvtMABrgF8ggS/w8oD4 PMY7wMhr7YawZ3/KpDizCNTStcvZakspxyRb5enaaTRPN7/zcMKHN6QjApXZp+k9IidK gSDDc7F58wcmaybNED3qEiqNjxXSwFPQW5LHmdSKrC1GbqOCvtgrpJYw7xzWfwHAfjb4 fkpvs/jhkNBfVDBJCoyFrY0KlF5X7sRmwhP4A29R6JnCgC2Ig7fBEsE87pAel0F5ylOe J7dw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=Ndv3ogCnfWyn9IVwEAtOE3LjzxevMahs7qFUVMtPAFE=; b=djpbgLNkfWY8mh1Iy9cUuuZCvmJpMDmLwX4vnOhcpdYZI2krFUPw83iW68ovr1UIWn k50K4Mpxz8Tl+CkKR/h3ULkATKCzNCrsfPRBZ3h4jEhJTRZwcI2MRB7Lvf2gjxuwshHu VquHVmR3FUBb6mjg+fmBZfOW5tRT9l6Gj30csPDPmAS8O6gVUwtkKleRb7hiSrs6paO9 eFSqEfh2IpkaNvhLDvfNeanH493jRILfpwffYWcsVl8eav6JUrTzBGoyt9dFvHcO1Ooy sIlaTza5KVykdBXIm/dQtNIwXW6UgPBzjt4/6aK8u84stXqRjg/tFSzgJTpIZoKeSf/k Of/g== X-Gm-Message-State: AG10YOT60Fn8wWzW2b491FGA6WJu1nK9UqaFPEWS0acjYp914RdoJfT2iHBhu1jAdg7uK++dGZHKi8yYLuRBSA== MIME-Version: 1.0 X-Received: by 10.28.222.86 with SMTP id v83mr29624004wmg.17.1453912086246; Wed, 27 Jan 2016 08:28:06 -0800 (PST) Received: by 10.194.82.195 with HTTP; Wed, 27 Jan 2016 08:28:06 -0800 (PST) Date: Wed, 27 Jan 2016 08:28:06 -0800 Message-ID: From: Madhuri Yechuri To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] request for beginner project suggestion X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1538583629179093903==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============1538583629179093903== Content-Type: multipart/alternative; boundary=001a114b10286f7e8d052a534953 --001a114b10286f7e8d052a534953 Content-Type: text/plain; charset=UTF-8 Hi, i am interested in contributing to MirageOS (during non-work hours), and wondering if there is a beginner project recommendation? This would be my first project in OCAML (have 15 years industry coding experience in C (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and recent 9 months in Python (Flocker)). Looking through https://github.com/mirage/mirage-www/wiki/Pioneer-Projects , i understand Logging is taken from recent emails on this mailing list. Is there is any other beginner-friendly project that i could take up? Thanks a lot! madhuri. --001a114b10286f7e8d052a534953 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi,

i am interested in contributing to = MirageOS (during non-work hours), and wondering if there is a beginner proj= ect recommendation? This would be my first project in OCAML (have 15 years = industry coding experience in C (Oracle Database Server, VMware ESX) and C+= + (VMware vCenter), and recent 9 months in Python (Flocker)).
Looking through=C2=A0https://github.com/mirage/mirage-www/wiki/Pion= eer-Projects , i understand Logging is taken from recent emails on this= mailing list. Is there is any other beginner-friendly project that i could= take up?

Thanks a lot!
madhuri.
--001a114b10286f7e8d052a534953-- --===============1538583629179093903== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============1538583629179093903==-- From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:28:10 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:28:10 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSwz-0006Hg-0v; Wed, 27 Jan 2016 16:28:09 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOSwy-0006Hb-71 for mirageos-devel@lists.xenproject.org; Wed, 27 Jan 2016 16:28:08 +0000 Received: from [85.158.139.211] by server-10.bemta-5.messagelabs.com id 05/F3-17090-710F8A65; Wed, 27 Jan 2016 16:28:07 +0000 X-Env-Sender: cosmokramer@gmail.com X-Msg-Ref: server-5.tower-206.messagelabs.com!1453912086!18533134!1 X-Originating-IP: [74.125.82.53] X-SpamReason: No, hits=1.2 required=7.0 tests=HTML_20_30,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 1150 invoked from network); 27 Jan 2016 16:28:06 -0000 Received: from mail-wm0-f53.google.com (HELO mail-wm0-f53.google.com) (74.125.82.53) by server-5.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 27 Jan 2016 16:28:06 -0000 Received: by mail-wm0-f53.google.com with SMTP id n5so36629744wmn.1 for ; Wed, 27 Jan 2016 08:28:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=Ndv3ogCnfWyn9IVwEAtOE3LjzxevMahs7qFUVMtPAFE=; b=KVSpXLwfFQwUkpmZTOw2sz0o/m3MfZ6rkXLpkmCZLIhGWT12k8fCktVUYYxsgWgylB GepGbjkbuW/jRNRW8SwpnRS41ZclR+/LqoiOTd6d/Qua41A2NOvtMABrgF8ggS/w8oD4 PMY7wMhr7YawZ3/KpDizCNTStcvZakspxyRb5enaaTRPN7/zcMKHN6QjApXZp+k9IidK gSDDc7F58wcmaybNED3qEiqNjxXSwFPQW5LHmdSKrC1GbqOCvtgrpJYw7xzWfwHAfjb4 fkpvs/jhkNBfVDBJCoyFrY0KlF5X7sRmwhP4A29R6JnCgC2Ig7fBEsE87pAel0F5ylOe J7dw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=Ndv3ogCnfWyn9IVwEAtOE3LjzxevMahs7qFUVMtPAFE=; b=djpbgLNkfWY8mh1Iy9cUuuZCvmJpMDmLwX4vnOhcpdYZI2krFUPw83iW68ovr1UIWn k50K4Mpxz8Tl+CkKR/h3ULkATKCzNCrsfPRBZ3h4jEhJTRZwcI2MRB7Lvf2gjxuwshHu VquHVmR3FUBb6mjg+fmBZfOW5tRT9l6Gj30csPDPmAS8O6gVUwtkKleRb7hiSrs6paO9 eFSqEfh2IpkaNvhLDvfNeanH493jRILfpwffYWcsVl8eav6JUrTzBGoyt9dFvHcO1Ooy sIlaTza5KVykdBXIm/dQtNIwXW6UgPBzjt4/6aK8u84stXqRjg/tFSzgJTpIZoKeSf/k Of/g== X-Gm-Message-State: AG10YOT60Fn8wWzW2b491FGA6WJu1nK9UqaFPEWS0acjYp914RdoJfT2iHBhu1jAdg7uK++dGZHKi8yYLuRBSA== MIME-Version: 1.0 X-Received: by 10.28.222.86 with SMTP id v83mr29624004wmg.17.1453912086246; Wed, 27 Jan 2016 08:28:06 -0800 (PST) Received: by 10.194.82.195 with HTTP; Wed, 27 Jan 2016 08:28:06 -0800 (PST) Date: Wed, 27 Jan 2016 08:28:06 -0800 Message-ID: From: Madhuri Yechuri To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] request for beginner project suggestion X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1538583629179093903==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============1538583629179093903== Content-Type: multipart/alternative; boundary=001a114b10286f7e8d052a534953 --001a114b10286f7e8d052a534953 Content-Type: text/plain; charset=UTF-8 Hi, i am interested in contributing to MirageOS (during non-work hours), and wondering if there is a beginner project recommendation? This would be my first project in OCAML (have 15 years industry coding experience in C (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and recent 9 months in Python (Flocker)). Looking through https://github.com/mirage/mirage-www/wiki/Pioneer-Projects , i understand Logging is taken from recent emails on this mailing list. Is there is any other beginner-friendly project that i could take up? Thanks a lot! madhuri. --001a114b10286f7e8d052a534953 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi,

i am interested in contributing to = MirageOS (during non-work hours), and wondering if there is a beginner proj= ect recommendation? This would be my first project in OCAML (have 15 years = industry coding experience in C (Oracle Database Server, VMware ESX) and C+= + (VMware vCenter), and recent 9 months in Python (Flocker)).
Looking through=C2=A0https://github.com/mirage/mirage-www/wiki/Pion= eer-Projects , i understand Logging is taken from recent emails on this= mailing list. Is there is any other beginner-friendly project that i could= take up?

Thanks a lot!
madhuri.
--001a114b10286f7e8d052a534953-- --===============1538583629179093903== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============1538583629179093903==-- From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:40:43 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:40:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOT97-00078B-1m; Wed, 27 Jan 2016 16:40:41 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOT95-000785-8G for mirageos-devel@lists.xenproject.org; Wed, 27 Jan 2016 16:40:39 +0000 Received: from [85.158.139.211] by server-1.bemta-5.messagelabs.com id 23/52-15353-603F8A65; Wed, 27 Jan 2016 16:40:38 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-11.tower-206.messagelabs.com!1453912837!18601797!1 X-Originating-IP: [209.85.213.54] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 18009 invoked from network); 27 Jan 2016 16:40:37 -0000 Received: from mail-vk0-f54.google.com (HELO mail-vk0-f54.google.com) (209.85.213.54) by server-11.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 27 Jan 2016 16:40:37 -0000 Received: by mail-vk0-f54.google.com with SMTP id n1so8165723vkb.3 for ; Wed, 27 Jan 2016 08:40:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=x9VK6+vUev0vYh6sM2CNybiLiXkYK0MOiN13p9JNBn0=; b=Fwft+ttnZiXXXehYTwXLB1mYq/Y1mKocFxXUS/PFCHQvNUOhuxCI3J5pIWDALiHRBK Rg1MH03sYpnHnlgxtdJ5wBu7BFtwcAMvLlGORNVOeJG8dv4i2XlLmcBparijYT4EMzqG NJyHBkkcoa0MqK8e9YeUCOdghgCbqT/6aU3IC1b2G93V9S16P6lrQqok7ON+q9iIfkdC r21+8GkbRwLEnceaeb/SJ/gmMx1sYTbb+z5uhZb/i7ews72kl6d9UUP0AKpOzJDrTrfp vIT+vQg2NZfK2grtG+xXwMcqYUbWfyjz0GNFvgRuFdj1E47D5DnmH7wanO9C6tXxHyPF 22Sw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=x9VK6+vUev0vYh6sM2CNybiLiXkYK0MOiN13p9JNBn0=; b=b2ZgRLxeZ9CWEaEHLQuFnx0EKW4PqZjpCLYJ4RpMhMyPl2XfNnmSn2YiUJQ10UCjQ/ +rM7uVmyIsLSLiCxCZaJFGSn1SUo/ZTy4CzZnxPDGEC2zOvqWOvt/gWg4tHOwcImNeKq 7uxO9yT6byv9sp1LjUKOtAVPfGK11GexhxfJBfh/QrwI9V7LFBsfWz+ru7Q302Wn/QuX yoYtMgPkKWcVIfo7VibBKpLbi3kNJr0pykL5n5puX5U6IX9OPqcHfZaeecEjQgMlRdEs juhRoH5CHRvyhLafts4HdrCdr5Mr6s+cxPU3nzwXYsvSwiqBZZBiSM//k/vL2fYMR93J anIQ== X-Gm-Message-State: AG10YORqAbDIQ0KFbAeQYmXshxWlMJwHJL/Gm+NltDKTdk5zphT/ax6litsK/v7uzKeTBTaP+94Z0sLcEuVkHQ== MIME-Version: 1.0 X-Received: by 10.31.178.146 with SMTP id b140mr18323951vkf.108.1453912836554; Wed, 27 Jan 2016 08:40:36 -0800 (PST) Received: by 10.31.130.129 with HTTP; Wed, 27 Jan 2016 08:40:36 -0800 (PST) In-Reply-To: References: Date: Wed, 27 Jan 2016 16:40:36 +0000 Message-ID: From: Thomas Leonard To: Madhuri Yechuri Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] request for beginner project suggestion X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 27 January 2016 at 16:28, Madhuri Yechuri wrote: > Hi, > > i am interested in contributing to MirageOS (during non-work hours), and > wondering if there is a beginner project recommendation? This would be my > first project in OCAML (have 15 years industry coding experience in C > (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and recent 9 > months in Python (Flocker)). > > Looking through https://github.com/mirage/mirage-www/wiki/Pioneer-Projects , > i understand Logging is taken from recent emails on this mailing list. Is > there is any other beginner-friendly project that i could take up? > > Thanks a lot! > madhuri. Hi Madhuri, There are lots of libraries that need improved logging, so as long as people say which ones they're working on there should be no problem - it would be great if you want to work on that! -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:40:43 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:40:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOT97-00078B-1m; Wed, 27 Jan 2016 16:40:41 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOT95-000785-8G for mirageos-devel@lists.xenproject.org; Wed, 27 Jan 2016 16:40:39 +0000 Received: from [85.158.139.211] by server-1.bemta-5.messagelabs.com id 23/52-15353-603F8A65; Wed, 27 Jan 2016 16:40:38 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-11.tower-206.messagelabs.com!1453912837!18601797!1 X-Originating-IP: [209.85.213.54] X-SpamReason: No, hits=0.3 required=7.0 tests=RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 18009 invoked from network); 27 Jan 2016 16:40:37 -0000 Received: from mail-vk0-f54.google.com (HELO mail-vk0-f54.google.com) (209.85.213.54) by server-11.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 27 Jan 2016 16:40:37 -0000 Received: by mail-vk0-f54.google.com with SMTP id n1so8165723vkb.3 for ; Wed, 27 Jan 2016 08:40:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=x9VK6+vUev0vYh6sM2CNybiLiXkYK0MOiN13p9JNBn0=; b=Fwft+ttnZiXXXehYTwXLB1mYq/Y1mKocFxXUS/PFCHQvNUOhuxCI3J5pIWDALiHRBK Rg1MH03sYpnHnlgxtdJ5wBu7BFtwcAMvLlGORNVOeJG8dv4i2XlLmcBparijYT4EMzqG NJyHBkkcoa0MqK8e9YeUCOdghgCbqT/6aU3IC1b2G93V9S16P6lrQqok7ON+q9iIfkdC r21+8GkbRwLEnceaeb/SJ/gmMx1sYTbb+z5uhZb/i7ews72kl6d9UUP0AKpOzJDrTrfp vIT+vQg2NZfK2grtG+xXwMcqYUbWfyjz0GNFvgRuFdj1E47D5DnmH7wanO9C6tXxHyPF 22Sw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=x9VK6+vUev0vYh6sM2CNybiLiXkYK0MOiN13p9JNBn0=; b=b2ZgRLxeZ9CWEaEHLQuFnx0EKW4PqZjpCLYJ4RpMhMyPl2XfNnmSn2YiUJQ10UCjQ/ +rM7uVmyIsLSLiCxCZaJFGSn1SUo/ZTy4CzZnxPDGEC2zOvqWOvt/gWg4tHOwcImNeKq 7uxO9yT6byv9sp1LjUKOtAVPfGK11GexhxfJBfh/QrwI9V7LFBsfWz+ru7Q302Wn/QuX yoYtMgPkKWcVIfo7VibBKpLbi3kNJr0pykL5n5puX5U6IX9OPqcHfZaeecEjQgMlRdEs juhRoH5CHRvyhLafts4HdrCdr5Mr6s+cxPU3nzwXYsvSwiqBZZBiSM//k/vL2fYMR93J anIQ== X-Gm-Message-State: AG10YORqAbDIQ0KFbAeQYmXshxWlMJwHJL/Gm+NltDKTdk5zphT/ax6litsK/v7uzKeTBTaP+94Z0sLcEuVkHQ== MIME-Version: 1.0 X-Received: by 10.31.178.146 with SMTP id b140mr18323951vkf.108.1453912836554; Wed, 27 Jan 2016 08:40:36 -0800 (PST) Received: by 10.31.130.129 with HTTP; Wed, 27 Jan 2016 08:40:36 -0800 (PST) In-Reply-To: References: Date: Wed, 27 Jan 2016 16:40:36 +0000 Message-ID: From: Thomas Leonard To: Madhuri Yechuri Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] request for beginner project suggestion X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 27 January 2016 at 16:28, Madhuri Yechuri wrote: > Hi, > > i am interested in contributing to MirageOS (during non-work hours), and > wondering if there is a beginner project recommendation? This would be my > first project in OCAML (have 15 years industry coding experience in C > (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and recent 9 > months in Python (Flocker)). > > Looking through https://github.com/mirage/mirage-www/wiki/Pioneer-Projects , > i understand Logging is taken from recent emails on this mailing list. Is > there is any other beginner-friendly project that i could take up? > > Thanks a lot! > madhuri. Hi Madhuri, There are lots of libraries that need improved logging, so as long as people say which ones they're working on there should be no problem - it would be great if you want to work on that! -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:48:47 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:48:47 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOTGv-0007XG-RM; Wed, 27 Jan 2016 16:48:45 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOTGt-0007Wp-HK; Wed, 27 Jan 2016 16:48:43 +0000 Received: from [85.158.139.211] by server-4.bemta-5.messagelabs.com id 0C/F5-12635-AE4F8A65; Wed, 27 Jan 2016 16:48:42 +0000 X-Env-Sender: lars.kurth.xen@gmail.com X-Msg-Ref: server-4.tower-206.messagelabs.com!1453913321!18597984!1 X-Originating-IP: [74.125.82.46] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 49719 invoked from network); 27 Jan 2016 16:48:41 -0000 Received: from mail-wm0-f46.google.com (HELO mail-wm0-f46.google.com) (74.125.82.46) by server-4.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 27 Jan 2016 16:48:41 -0000 Received: by mail-wm0-f46.google.com with SMTP id n5so35709031wmn.0; Wed, 27 Jan 2016 08:48:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:content-transfer-encoding:subject:date:message-id :cc:to:mime-version; bh=ey9vlWWIwPaOlZj36Spl9r5ZptikZdir6XKmWKJA9Mc=; b=IMFqG43oTqUZp0+AeisMxqgB1FhD7zn47ADpddDYoQv1kIUJDIxiYDvnKtnGR1InCw VZ4p6ohVl/UPaFkX1YywDbVrI9Di+rv7KrLBrI3QH+RBFCX8dEOLnM40OBxSIG89zFp9 UbqZv0BQ6ndz+m+usQc5vj7Sobp401zQiT4BJXMEqpynbenRR+8tUHNjAUXY/VwAGK4Q JIi+8EQAggZ8YDROVBnmjit0nrdu7UNOvTjW0r8/sA2MhTopCZ04mAW/mWwIknJuiU2N TvTQbfXeQvSgbLhL0GyAsNBf9fr5wgmZ7t7istVU2NkDGnSCvVNg4tYRVuZ7A6ZXg15s n49A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:content-type:content-transfer-encoding :subject:date:message-id:cc:to:mime-version; bh=ey9vlWWIwPaOlZj36Spl9r5ZptikZdir6XKmWKJA9Mc=; b=GdNPz6zu5Ee1MAQOU5kllLe9OsnqJwr/kbP4zzc+tdaPxgQnoNVmleQQ26l7xQWd9u OqzoqDIUOVqS5bqbX0QZQJ4M8IEbahBucCaiihS5vsaAXyReAR0s1xCwfgi0T4KU4QlT LlpPnW5zoa+Fm9AwUlF0RhqpANRKsh/Pfhs9EAYvvS7jwWZt5Dy9bxsTMgSQJllcwRbM Pikxi8i3A0E5BlG0AZKqqkFtknLXe/Ra6brrNORdpmMN1RjKa14jstaNQ4HLOkbTV501 oOOhI7vqoFqUzqH0TCTATDCZtNW69CsVCmKpDxOPamCE4+wG2kgNTjKuX6YUFPjZM4HC BODw== X-Gm-Message-State: AG10YOSki4a0iIrzW9HGx30iK7AGjj7CIq+FAnnpyIdP/kAscUJoOmbFPDxLCChlNPjaUw== X-Received: by 10.194.52.72 with SMTP id r8mr29853878wjo.148.1453913321165; Wed, 27 Jan 2016 08:48:41 -0800 (PST) Received: from [192.168.0.9] (5ec0a1a0.skybroadband.com. [94.192.161.160]) by smtp.gmail.com with ESMTPSA id k130sm8505998wmg.6.2016.01.27.08.48.39 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 27 Jan 2016 08:48:39 -0800 (PST) From: Lars Kurth Date: Wed, 27 Jan 2016 16:48:37 +0000 Message-Id: To: xen-devel , mirageos-devel , Win-pv-devel@lists.xenproject.org, embedded-pv-devel@lists.xenproject.org Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) X-Mailer: Apple Mail (2.2104) Cc: xen-users@lists.xenproject.org Subject: [MirageOS-devel] Xen Project Infrastructure Maintenance: xenbits (Jan 28), qemu-bitslave & mail & downloads.xenproject.org (Feb 1), lists & etherpad (Feb 4th) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi everyone, we are rebooting a number of Xen Project services in the next few days to upgrade operating systems. This means that a few services may be temporarily unavailable. The following websites are affected and will be done during the times below. If you notice any issues after the reboot, please reply to this mail or check on the #xeninfra IRC channel. = Jan 28, 7am - 9am UTC : affecting xenbits = Affected services: Xen Project source code repositories, automatically generated xenproject docs, list of security vulnerabilities If you need to clone or commit to any affected repositories please do so before or after = Feb 1, 7am - 9am UTC : affecting qemu-bitslave and xenproject.org mail aliases and downloads.xenproject.org = Affected services: qemu-bitslave, mail server, DNS and downloads.xenproject.org Note that mails to e-mails using foo-bar@xenproject.org may be delayed during the maintenance window. = Feb 4, 7am - 9am UTC : affecting xen project mailing lists & ether pad = Affected services: all foo@lists.xenproject.org mailing lists and ether pads Note that mails to all mailing lists will be delayed during the maintenance window Best Regards Lars _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Wed Jan 27 16:48:47 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 27 Jan 2016 16:48:47 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOTGv-0007XG-RM; Wed, 27 Jan 2016 16:48:45 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOTGt-0007Wp-HK; Wed, 27 Jan 2016 16:48:43 +0000 Received: from [85.158.139.211] by server-4.bemta-5.messagelabs.com id 0C/F5-12635-AE4F8A65; Wed, 27 Jan 2016 16:48:42 +0000 X-Env-Sender: lars.kurth.xen@gmail.com X-Msg-Ref: server-4.tower-206.messagelabs.com!1453913321!18597984!1 X-Originating-IP: [74.125.82.46] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 49719 invoked from network); 27 Jan 2016 16:48:41 -0000 Received: from mail-wm0-f46.google.com (HELO mail-wm0-f46.google.com) (74.125.82.46) by server-4.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 27 Jan 2016 16:48:41 -0000 Received: by mail-wm0-f46.google.com with SMTP id n5so35709031wmn.0; Wed, 27 Jan 2016 08:48:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:content-type:content-transfer-encoding:subject:date:message-id :cc:to:mime-version; bh=ey9vlWWIwPaOlZj36Spl9r5ZptikZdir6XKmWKJA9Mc=; b=IMFqG43oTqUZp0+AeisMxqgB1FhD7zn47ADpddDYoQv1kIUJDIxiYDvnKtnGR1InCw VZ4p6ohVl/UPaFkX1YywDbVrI9Di+rv7KrLBrI3QH+RBFCX8dEOLnM40OBxSIG89zFp9 UbqZv0BQ6ndz+m+usQc5vj7Sobp401zQiT4BJXMEqpynbenRR+8tUHNjAUXY/VwAGK4Q JIi+8EQAggZ8YDROVBnmjit0nrdu7UNOvTjW0r8/sA2MhTopCZ04mAW/mWwIknJuiU2N TvTQbfXeQvSgbLhL0GyAsNBf9fr5wgmZ7t7istVU2NkDGnSCvVNg4tYRVuZ7A6ZXg15s n49A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:content-type:content-transfer-encoding :subject:date:message-id:cc:to:mime-version; bh=ey9vlWWIwPaOlZj36Spl9r5ZptikZdir6XKmWKJA9Mc=; b=GdNPz6zu5Ee1MAQOU5kllLe9OsnqJwr/kbP4zzc+tdaPxgQnoNVmleQQ26l7xQWd9u OqzoqDIUOVqS5bqbX0QZQJ4M8IEbahBucCaiihS5vsaAXyReAR0s1xCwfgi0T4KU4QlT LlpPnW5zoa+Fm9AwUlF0RhqpANRKsh/Pfhs9EAYvvS7jwWZt5Dy9bxsTMgSQJllcwRbM Pikxi8i3A0E5BlG0AZKqqkFtknLXe/Ra6brrNORdpmMN1RjKa14jstaNQ4HLOkbTV501 oOOhI7vqoFqUzqH0TCTATDCZtNW69CsVCmKpDxOPamCE4+wG2kgNTjKuX6YUFPjZM4HC BODw== X-Gm-Message-State: AG10YOSki4a0iIrzW9HGx30iK7AGjj7CIq+FAnnpyIdP/kAscUJoOmbFPDxLCChlNPjaUw== X-Received: by 10.194.52.72 with SMTP id r8mr29853878wjo.148.1453913321165; Wed, 27 Jan 2016 08:48:41 -0800 (PST) Received: from [192.168.0.9] (5ec0a1a0.skybroadband.com. [94.192.161.160]) by smtp.gmail.com with ESMTPSA id k130sm8505998wmg.6.2016.01.27.08.48.39 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 27 Jan 2016 08:48:39 -0800 (PST) From: Lars Kurth Date: Wed, 27 Jan 2016 16:48:37 +0000 Message-Id: To: xen-devel , mirageos-devel , Win-pv-devel@lists.xenproject.org, embedded-pv-devel@lists.xenproject.org Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) X-Mailer: Apple Mail (2.2104) Cc: xen-users@lists.xenproject.org Subject: [MirageOS-devel] Xen Project Infrastructure Maintenance: xenbits (Jan 28), qemu-bitslave & mail & downloads.xenproject.org (Feb 1), lists & etherpad (Feb 4th) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi everyone, we are rebooting a number of Xen Project services in the next few days to upgrade operating systems. This means that a few services may be temporarily unavailable. The following websites are affected and will be done during the times below. If you notice any issues after the reboot, please reply to this mail or check on the #xeninfra IRC channel. = Jan 28, 7am - 9am UTC : affecting xenbits = Affected services: Xen Project source code repositories, automatically generated xenproject docs, list of security vulnerabilities If you need to clone or commit to any affected repositories please do so before or after = Feb 1, 7am - 9am UTC : affecting qemu-bitslave and xenproject.org mail aliases and downloads.xenproject.org = Affected services: qemu-bitslave, mail server, DNS and downloads.xenproject.org Note that mails to e-mails using foo-bar@xenproject.org may be delayed during the maintenance window. = Feb 4, 7am - 9am UTC : affecting xen project mailing lists & ether pad = Affected services: all foo@lists.xenproject.org mailing lists and ether pads Note that mails to all mailing lists will be delayed during the maintenance window Best Regards Lars _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 28 05:58:51 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 28 Jan 2016 05:58:51 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOfbH-0001fI-S5; Thu, 28 Jan 2016 05:58:35 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOfbF-0001fD-Ll for mirageos-devel@lists.xenproject.org; Thu, 28 Jan 2016 05:58:33 +0000 Received: from [85.158.139.211] by server-7.bemta-5.messagelabs.com id 96/BA-13905-80EA9A65; Thu, 28 Jan 2016 05:58:32 +0000 X-Env-Sender: cosmokramer@gmail.com X-Msg-Ref: server-13.tower-206.messagelabs.com!1453960711!18417520!1 X-Originating-IP: [74.125.82.42] X-SpamReason: No, hits=0.9 required=7.0 tests=BODY_RANDOM_LONG, HTML_50_60,HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 57371 invoked from network); 28 Jan 2016 05:58:31 -0000 Received: from mail-wm0-f42.google.com (HELO mail-wm0-f42.google.com) (74.125.82.42) by server-13.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 28 Jan 2016 05:58:31 -0000 Received: by mail-wm0-f42.google.com with SMTP id n5so10248533wmn.1 for ; Wed, 27 Jan 2016 21:58:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=k/W5QyX44jC4+waOXVzmzCZEAvVa/EB9NJ83Q7Fw8VU=; b=uD43AHdlDHXkDvB3hNrQqWZQH78p0jJIgx5LsGbs1ykby6Lo0lfNncX96/N8V01RkI uG6WgtKHJC63lzVsQ8OVmNFWHfq/ODhckVDg8Gq5d0g40TvP2nRW8vu3nzX/xdbPe/se zv+MYNOyoRX8UgkAjgJdHeEXfIx5f0eHdtNdNpO3pwVgFnP0m2Kn5X8ckXJagVO6ztUv sdNf0RgYav5IhaCQWzmRcXucPzeRNTm3EIxHxqvFARMtj9udGxWSrAhQL22Y3Xyancq9 a37T06kCYlWmITJDdOUCIj79uzCb3T0MzVsC+JCqvh0z7/duWnO7WMrIi4WNpQsdWL6r blNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=k/W5QyX44jC4+waOXVzmzCZEAvVa/EB9NJ83Q7Fw8VU=; b=FhhxJYKzfEypCAjx/Hb0NFXTgGmayKCAUdMs8CmchOKIv06kY3cHvw5YRqfgp9qRug WZbio6tX6wBQU5y9GcQp3J+1Ha6KVMxZXj9rk6xeS7+DGT3YOFigtpg7tMjXkbV2qG7Z 77q1tTQy8JtaF7zqUrvAiAU7AWY1rPQtFyC4uzco0h5lcDpVDV2DeZAaIsk6enLJqxYt tHKtpBZFGM6D2VK1DL9VQT3GaceSeDzYiaoOqIuwnOrOjvwqgPzF6SzUb2VPSgbdVZOK sGunjzaEcsDqrY7XFTvWmovuL+6h5cv3FWbEfPG+NoOkdzpaTDd8xNArG8dRZrzn6mMj JeWg== X-Gm-Message-State: AG10YOR3ZrbQdhTtU3nDr8l1flyqy/erGpi3fnheX51h4/uRQ4oETErZLoZxcDOSL8WDWALHtrjqBXWbbu3Mfw== MIME-Version: 1.0 X-Received: by 10.28.16.8 with SMTP id 8mr1067703wmq.77.1453960711210; Wed, 27 Jan 2016 21:58:31 -0800 (PST) Received: by 10.194.82.195 with HTTP; Wed, 27 Jan 2016 21:58:31 -0800 (PST) In-Reply-To: References: Date: Wed, 27 Jan 2016 21:58:31 -0800 Message-ID: From: Madhuri Yechuri To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] request for beginner project suggestion X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============4808991589046378994==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============4808991589046378994== Content-Type: multipart/alternative; boundary=001a114725a0b592c6052a5e9ba3 --001a114725a0b592c6052a5e9ba3 Content-Type: text/plain; charset=UTF-8 Great, thanks for the quick response! i assume below advice still holds true, in that case. ______ You could start by cloning the mirage-skeleton repository and making a new example based on "console" that uses logging rather than printing. For modifying libraries, you'll need to know how to "opam pin" a modified package for testing. There's some useful information here: https://www.somerandomidiot.com/blog/2015/11/26/quick-changes-in-mirageos/ (however, I find it easier to look in the Makefile to find the dependencies, rather than reading the source of the mirage tool, and make sure you do "opam pin -k git" to pin in "mixed mode", or you'll have endless trouble with stale OASIS files) ______ i can start with https://github.com/mirage/mirage-net-xen/blob/995bcf518b7c8e41e7db79050948bb7ecc1046b2/lib/frontend.ml#L106 , as listed in the Pioneer Projects page. Is there a recommended regression test set? i looked around https://mirage.io/wiki/contributing, but couldn't find any pointers. Thanks a lot! madhuri. On Wed, Jan 27, 2016 at 8:40 AM, Thomas Leonard wrote: > On 27 January 2016 at 16:28, Madhuri Yechuri > wrote: > > Hi, > > > > i am interested in contributing to MirageOS (during non-work hours), and > > wondering if there is a beginner project recommendation? This would be my > > first project in OCAML (have 15 years industry coding experience in C > > (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and > recent 9 > > months in Python (Flocker)). > > > > Looking through > https://github.com/mirage/mirage-www/wiki/Pioneer-Projects , > > i understand Logging is taken from recent emails on this mailing list. Is > > there is any other beginner-friendly project that i could take up? > > > > Thanks a lot! > > madhuri. > > Hi Madhuri, > > There are lots of libraries that need improved logging, so as long as > people say which ones they're working on there should be no problem - > it would be great if you want to work on that! > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > --001a114725a0b592c6052a5e9ba3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Great, thanks for the quick response! i assume below advic= e still holds true, in that case.

______
You could start by cloning the mirage-skeleton re= pository and making a
new example based on "console" that uses=C2=A0logging=C2=A0rather than printing.

For modifying = libraries, you'll need to know how to "opam pin" a
modified package fo= r testing. There's some useful information here:

https://www.somerandomidiot.com/bl= og/2015/11/26/quick-changes-in-mirageos/
(however, I find = it easier to look in the Makefile to find the
dependencies, rather than reading the = source of the mirage tool, and
make sure you do "opam pin -k git" to pin i= n "mixed mode", or you'll
= have endless trouble with stale OASIS files)=
______



Thanks a lot!
madhuri.

On Wed, Jan 27, 201= 6 at 8:40 AM, Thomas Leonard <talex5@gmail.com> wrote:
On 27 J= anuary 2016 at 16:28, Madhuri Yechuri <cosmokramer@gmail.com> wrote:
> Hi,
>
> i am interested in contributing to MirageOS (during non-work hours), a= nd
> wondering if there is a beginner project recommendation? This would be= my
> first project in OCAML (have 15 years industry coding experience in C<= br> > (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and rec= ent 9
> months in Python (Flocker)).
>
> Looking through https://github.com/mi= rage/mirage-www/wiki/Pioneer-Projects ,
> i understand Logging is taken from recent emails on this mailing list.= Is
> there is any other beginner-friendly project that i could take up?
>
> Thanks a lot!
> madhuri.

Hi Madhuri,

There are lots of libraries that need improved logging, so as long as
people say which ones they're working on there should be no problem - it would be great if you want to work on that!


--
Dr Thomas Leonard=C2=A0 =C2=A0 =C2=A0 =C2=A0 http://roscidus.com/blog/<= br> GPG: DA98 25AE CAD0 8975 7CDA=C2=A0 BD8E 0713 3F96 CA74 D8BA

--001a114725a0b592c6052a5e9ba3-- --===============4808991589046378994== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel --===============4808991589046378994==-- From mirageos-devel-bounces@lists.xenproject.org Thu Jan 28 05:58:51 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 28 Jan 2016 05:58:51 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOfbH-0001fI-S5; Thu, 28 Jan 2016 05:58:35 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOfbF-0001fD-Ll for mirageos-devel@lists.xenproject.org; Thu, 28 Jan 2016 05:58:33 +0000 Received: from [85.158.139.211] by server-7.bemta-5.messagelabs.com id 96/BA-13905-80EA9A65; Thu, 28 Jan 2016 05:58:32 +0000 X-Env-Sender: cosmokramer@gmail.com X-Msg-Ref: server-13.tower-206.messagelabs.com!1453960711!18417520!1 X-Originating-IP: [74.125.82.42] X-SpamReason: No, hits=0.9 required=7.0 tests=BODY_RANDOM_LONG, HTML_50_60,HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 57371 invoked from network); 28 Jan 2016 05:58:31 -0000 Received: from mail-wm0-f42.google.com (HELO mail-wm0-f42.google.com) (74.125.82.42) by server-13.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 28 Jan 2016 05:58:31 -0000 Received: by mail-wm0-f42.google.com with SMTP id n5so10248533wmn.1 for ; Wed, 27 Jan 2016 21:58:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=k/W5QyX44jC4+waOXVzmzCZEAvVa/EB9NJ83Q7Fw8VU=; b=uD43AHdlDHXkDvB3hNrQqWZQH78p0jJIgx5LsGbs1ykby6Lo0lfNncX96/N8V01RkI uG6WgtKHJC63lzVsQ8OVmNFWHfq/ODhckVDg8Gq5d0g40TvP2nRW8vu3nzX/xdbPe/se zv+MYNOyoRX8UgkAjgJdHeEXfIx5f0eHdtNdNpO3pwVgFnP0m2Kn5X8ckXJagVO6ztUv sdNf0RgYav5IhaCQWzmRcXucPzeRNTm3EIxHxqvFARMtj9udGxWSrAhQL22Y3Xyancq9 a37T06kCYlWmITJDdOUCIj79uzCb3T0MzVsC+JCqvh0z7/duWnO7WMrIi4WNpQsdWL6r blNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=k/W5QyX44jC4+waOXVzmzCZEAvVa/EB9NJ83Q7Fw8VU=; b=FhhxJYKzfEypCAjx/Hb0NFXTgGmayKCAUdMs8CmchOKIv06kY3cHvw5YRqfgp9qRug WZbio6tX6wBQU5y9GcQp3J+1Ha6KVMxZXj9rk6xeS7+DGT3YOFigtpg7tMjXkbV2qG7Z 77q1tTQy8JtaF7zqUrvAiAU7AWY1rPQtFyC4uzco0h5lcDpVDV2DeZAaIsk6enLJqxYt tHKtpBZFGM6D2VK1DL9VQT3GaceSeDzYiaoOqIuwnOrOjvwqgPzF6SzUb2VPSgbdVZOK sGunjzaEcsDqrY7XFTvWmovuL+6h5cv3FWbEfPG+NoOkdzpaTDd8xNArG8dRZrzn6mMj JeWg== X-Gm-Message-State: AG10YOR3ZrbQdhTtU3nDr8l1flyqy/erGpi3fnheX51h4/uRQ4oETErZLoZxcDOSL8WDWALHtrjqBXWbbu3Mfw== MIME-Version: 1.0 X-Received: by 10.28.16.8 with SMTP id 8mr1067703wmq.77.1453960711210; Wed, 27 Jan 2016 21:58:31 -0800 (PST) Received: by 10.194.82.195 with HTTP; Wed, 27 Jan 2016 21:58:31 -0800 (PST) In-Reply-To: References: Date: Wed, 27 Jan 2016 21:58:31 -0800 Message-ID: From: Madhuri Yechuri To: Thomas Leonard Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] request for beginner project suggestion X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============4808991589046378994==" Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org --===============4808991589046378994== Content-Type: multipart/alternative; boundary=001a114725a0b592c6052a5e9ba3 --001a114725a0b592c6052a5e9ba3 Content-Type: text/plain; charset=UTF-8 Great, thanks for the quick response! i assume below advice still holds true, in that case. ______ You could start by cloning the mirage-skeleton repository and making a new example based on "console" that uses logging rather than printing. For modifying libraries, you'll need to know how to "opam pin" a modified package for testing. There's some useful information here: https://www.somerandomidiot.com/blog/2015/11/26/quick-changes-in-mirageos/ (however, I find it easier to look in the Makefile to find the dependencies, rather than reading the source of the mirage tool, and make sure you do "opam pin -k git" to pin in "mixed mode", or you'll have endless trouble with stale OASIS files) ______ i can start with https://github.com/mirage/mirage-net-xen/blob/995bcf518b7c8e41e7db79050948bb7ecc1046b2/lib/frontend.ml#L106 , as listed in the Pioneer Projects page. Is there a recommended regression test set? i looked around https://mirage.io/wiki/contributing, but couldn't find any pointers. Thanks a lot! madhuri. On Wed, Jan 27, 2016 at 8:40 AM, Thomas Leonard wrote: > On 27 January 2016 at 16:28, Madhuri Yechuri > wrote: > > Hi, > > > > i am interested in contributing to MirageOS (during non-work hours), and > > wondering if there is a beginner project recommendation? This would be my > > first project in OCAML (have 15 years industry coding experience in C > > (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and > recent 9 > > months in Python (Flocker)). > > > > Looking through > https://github.com/mirage/mirage-www/wiki/Pioneer-Projects , > > i understand Logging is taken from recent emails on this mailing list. Is > > there is any other beginner-friendly project that i could take up? > > > > Thanks a lot! > > madhuri. > > Hi Madhuri, > > There are lots of libraries that need improved logging, so as long as > people say which ones they're working on there should be no problem - > it would be great if you want to work on that! > > > -- > Dr Thomas Leonard http://roscidus.com/blog/ > GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > --001a114725a0b592c6052a5e9ba3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Great, thanks for the quick response! i assume below advic= e still holds true, in that case.

______
You could start by cloning the mirage-skeleton re= pository and making a
new example based on "console" that uses=C2=A0logging=C2=A0rather than printing.

For modifying = libraries, you'll need to know how to "opam pin" a
modified package fo= r testing. There's some useful information here:

https://www.somerandomidiot.com/bl= og/2015/11/26/quick-changes-in-mirageos/
(however, I find = it easier to look in the Makefile to find the
dependencies, rather than reading the = source of the mirage tool, and
make sure you do "opam pin -k git" to pin i= n "mixed mode", or you'll
= have endless trouble with stale OASIS files)=
______



Thanks a lot!
madhuri.

On Wed, Jan 27, 201= 6 at 8:40 AM, Thomas Leonard <talex5@gmail.com> wrote:
On 27 J= anuary 2016 at 16:28, Madhuri Yechuri <cosmokramer@gmail.com> wrote:
> Hi,
>
> i am interested in contributing to MirageOS (during non-work hours), a= nd
> wondering if there is a beginner project recommendation? This would be= my
> first project in OCAML (have 15 years industry coding experience in C<= br> > (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and rec= ent 9
> months in Python (Flocker)).
>
> Looking through https://github.com/mi= rage/mirage-www/wiki/Pioneer-Projects ,
> i understand Logging is taken from recent emails on this mailing list.= Is
> there is any other beginner-friendly project that i could take up?
>
> Thanks a lot!
> madhuri.

Hi Madhuri,

There are lots of libraries that need improved logging, so as long as
people say which ones they're working on there should be no problem - it would be great if you want to work on that!


--
Dr Thomas Leonard=C2=A0 =C2=A0 =C2=A0 =C2=A0 http://roscidus.com/blog/<= br> GPG: DA98 25AE CAD0 8975 7CDA=C2=A0 BD8E 0713 3F96 CA74 D8BA

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The server is not responding and we have to wait for the support of the service provider to rectify the issue. I will let you know, once the issue is resolved. Regards Lars > On 27 Jan 2016, at 16:48, Lars Kurth wrote: > = Jan 28, 7am - 9am UTC : affecting xenbits = > Affected services: Xen Project source code repositories, automatically generated xenproject docs, list of security vulnerabilities > If you need to clone or commit to any affected repositories please do so before or after _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 28 09:48:34 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 28 Jan 2016 09:48:34 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOjBk-00005u-47; Thu, 28 Jan 2016 09:48:28 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOjBi-00005R-UW; Thu, 28 Jan 2016 09:48:27 +0000 Received: from [85.158.143.35] by server-2.bemta-4.messagelabs.com id 6C/65-08977-9E3E9A65; Thu, 28 Jan 2016 09:48:25 +0000 X-Env-Sender: lars.kurth.xen@gmail.com X-Msg-Ref: server-8.tower-21.messagelabs.com!1453974504!12585941!1 X-Originating-IP: [74.125.82.44] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 59929 invoked from network); 28 Jan 2016 09:48:25 -0000 Received: from mail-wm0-f44.google.com (HELO mail-wm0-f44.google.com) (74.125.82.44) by server-8.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 28 Jan 2016 09:48:25 -0000 Received: by mail-wm0-f44.google.com with SMTP id r129so16414322wmr.0; Thu, 28 Jan 2016 01:48:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=Guca8PqER+GEAeTEm183RwQq/3DbexI0OXcDfmPPeGc=; b=ggoUifNHjEsQ9GqYGjDa4gsPChKQKOnNqarcIOSpoYtvryGeHU+T40eFXJBMTvPeCp g9XXYUq1LWqtS0fkR8IbilPiNAydVoNsHoBfXMZWT1KN67RFgfONI5JxdZa71uei2x5S YFNe3VGIC2106arJOSnLaLCdPQJk/kuHbufPpE/LMMWHaK5i50k4Ifm99+uDddT21NjF QGarsNFoJuBHZtoD0+xU6mOPYRjyFnUZt/4KuA7fPSLIGXMj3GaaKDqHOp5LoXiQ5NGt LEIMvyc06etKqqw/cpnfPVqF1Ox8K1/EEBuBglg1mkP/JEXxZ9b0OiCA4rJJRtkImYSV G3BA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=Guca8PqER+GEAeTEm183RwQq/3DbexI0OXcDfmPPeGc=; b=GaPJ/Br2ZtykU5syRuttK7YC60BxJ4Zzz7+GCTQAtbbK0WuxY/G4mkI5nwc68uDmlD S0gZAZp8RwGdpEMjhCC2ccr3JW4+TvyTdTJVw1BBLGWsfY7krPL6AcNHjj4BMY5RDDFR CUaDDMdlABe69qzOCzaAu3XIo08cEPdWg2t5NjsTQz/eRgvE2xqhv/AYofnt3s64z8MI Ii3VvzRMeag/gQn0bgtzsL2tZcnRvT3lkNfy1uhguXirU7rocpQ5xosZCklDVk+8wqMT yEcPYsJ3aEkwM3Y5fL1Vvt74qtfTzYE1rFOgAVbHCZMxSpBbp5Z0IdA9Yi1eg2euuXNb f/Yw== X-Gm-Message-State: AG10YORH/u02Vi3eBQxXp0C2NP+0dJaKIXJY58XlcStE6zcNF9L+jQbIlMrC4egGfdUNyA== X-Received: by 10.194.192.170 with SMTP id hh10mr2268873wjc.69.1453974503781; Thu, 28 Jan 2016 01:48:23 -0800 (PST) Received: from [192.168.0.12] (5ec0a1a0.skybroadband.com. 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The server is not responding and we have to wait for the support of the service provider to rectify the issue. I will let you know, once the issue is resolved. 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[94.192.161.160]) by smtp.gmail.com with ESMTPSA id r10sm10612055wjz.24.2016.01.28.03.36.53 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 28 Jan 2016 03:36:53 -0800 (PST) Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Lars Kurth In-Reply-To: Date: Thu, 28 Jan 2016 11:36:52 +0000 Message-Id: References: To: xen-devel , mirageos-devel , Win-pv-devel@lists.xenproject.org, embedded-pv-devel@lists.xenproject.org X-Mailer: Apple Mail (2.2104) Cc: xen-users@lists.xenproject.org Subject: Re: [MirageOS-devel] Xen Project Infrastructure Maintenance: xenbits (Jan 28), qemu-bitslave & mail & downloads.xenproject.org (Feb 1), lists & etherpad (Feb 4th) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi everyone, http://xenbits.xen.org/ is live again. This means that access to git repositories, on-line documentation and information to XSA's has been restored. Apologies for any inconvenience that was caused. Best Regards Lars _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Thu Jan 28 11:37:10 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 28 Jan 2016 11:37:10 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOkst-0002QE-HH; Thu, 28 Jan 2016 11:37:07 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aOksr-0002Po-HK; Thu, 28 Jan 2016 11:37:05 +0000 Received: from [85.158.143.35] by server-1.bemta-4.messagelabs.com id 15/DA-09708-06DF9A65; Thu, 28 Jan 2016 11:37:04 +0000 X-Env-Sender: lars.kurth.xen@gmail.com X-Msg-Ref: server-4.tower-21.messagelabs.com!1453981015!12595011!1 X-Originating-IP: [74.125.82.54] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 38672 invoked from network); 28 Jan 2016 11:37:03 -0000 Received: from mail-wm0-f54.google.com (HELO mail-wm0-f54.google.com) (74.125.82.54) by server-4.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 28 Jan 2016 11:37:03 -0000 Received: by mail-wm0-f54.google.com with SMTP id p63so20376454wmp.1; Thu, 28 Jan 2016 03:37:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=3iZRWVJFg/dbVock04X0wXbPcIK1vFz7BUwgS7C5m+8=; b=qRup5xBFQrZjjqd4SaH/lHw8sHq6Zux7AwWc3cRgxqvzglkCminWbiDVFiuCpcrmVK RU+PzEjsPc/x3nwuSrNe9JaQmbuC5wXo6W2Fd339jHaPL3MzWUnkoNliP4iCppk9mV9x saJkMayV3wnPcL3J/XMV0sJYOQ+F0wNreS6puUPdDOtv2iqazIVj3bPbXl8J2QqCyzlf N+3cyKmnSQBPW/+2BykOuaRspZCJkiSyPntY62ssQFTJPlX+svghk/SkG6sARNAh+9Qi Eil8PnkIth9QXcLT8eVoPjpz4mAkOUgXIwDLh4oh4MydfqW7NfBmH5uspwkoJrEPYPE1 3JTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=3iZRWVJFg/dbVock04X0wXbPcIK1vFz7BUwgS7C5m+8=; b=g0zpqu4UNQPGeC+NLKoT4rwW1LYs/QugdmK9ZRX5+TxSvOyHjM6u79kuVRYnjL7wOe DXxRWS6k90ZY34Imd2/UEknCZwiqzWQ/0MkJ3yFJ6hbabYHV29X409XKMO2xGXXRgZ3A lVAQUPDKPZMsnE825CCCotKnnfmKNUEg5/DsIraq62INX3wNR+sVs/e5o2NCXZs+nTp8 Ntvaf87Kifuve6NfH2f9KTLYwHWtK3CGUp0FXo1iGH/AfPOyTAWEwoJuIzUeKnpaq54N GIR2TXA2obelqedXDrJ+LM3Ri/GSZKEI+HPgblMG8TQVO4LfE9dSVBF36FShzeFalI2J yDsQ== X-Gm-Message-State: AG10YORHuBFWPjW/I9OeysR9Dnm5Qt+WfT/Ro0fR4QzzXFPuYt5QRIb9GYDp1GJiHBY7mA== X-Received: by 10.194.52.8 with SMTP id p8mr2537660wjo.62.1453981014654; Thu, 28 Jan 2016 03:36:54 -0800 (PST) Received: from [192.168.0.12] (5ec0a1a0.skybroadband.com. [94.192.161.160]) by smtp.gmail.com with ESMTPSA id r10sm10612055wjz.24.2016.01.28.03.36.53 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 28 Jan 2016 03:36:53 -0800 (PST) Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Lars Kurth In-Reply-To: Date: Thu, 28 Jan 2016 11:36:52 +0000 Message-Id: References: To: xen-devel , mirageos-devel , Win-pv-devel@lists.xenproject.org, embedded-pv-devel@lists.xenproject.org X-Mailer: Apple Mail (2.2104) Cc: xen-users@lists.xenproject.org Subject: Re: [MirageOS-devel] Xen Project Infrastructure Maintenance: xenbits (Jan 28), qemu-bitslave & mail & downloads.xenproject.org (Feb 1), lists & etherpad (Feb 4th) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi everyone, http://xenbits.xen.org/ is live again. This means that access to git repositories, on-line documentation and information to XSA's has been restored. Apologies for any inconvenience that was caused. Best Regards Lars _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 29 10:43:06 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 29 Jan 2016 10:43:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aP6W0-0002zz-Rm; Fri, 29 Jan 2016 10:42:56 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aP6Vy-0002zd-RZ; Fri, 29 Jan 2016 10:42:54 +0000 Received: from [85.158.139.211] by server-13.bemta-5.messagelabs.com id CB/28-09478-D224BA65; Fri, 29 Jan 2016 10:42:53 +0000 X-Env-Sender: lars.kurth.xen@gmail.com X-Msg-Ref: server-2.tower-206.messagelabs.com!1454064172!19028662!1 X-Originating-IP: [74.125.82.41] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 47337 invoked from network); 29 Jan 2016 10:42:52 -0000 Received: from mail-wm0-f41.google.com (HELO mail-wm0-f41.google.com) (74.125.82.41) by server-2.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 29 Jan 2016 10:42:52 -0000 Received: by mail-wm0-f41.google.com with SMTP id p63so62543564wmp.1; Fri, 29 Jan 2016 02:42:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=ZItSW/6WdgwAU12GeExgQqJIUQBumiWmPiFyandvuB8=; b=ztnK3dnGl92MPM4Ba9OWtvgqO+JIS8MCPDDKxY6pJ2NWeriW525Mxp6Oq4OnTQ69wb DetpZ02+Gq/i23R1eqLRNupjF28NgkKpqJZ14aVzSGdnu3h1DSHNNv+89V5mMGvC38QO fBtG+3qG7+77V9VdlOwOom1ARTROuiIlSmQFuEut2Ip+JAnr72L2s3RNHlbiDxsoLOUW UMbvN/g+1dsWpaN3iC84WDY8Fs8Rfo6tFq7h4vhxfmyIcoyh/UoRtXQbWqWQFRcCvBKR yFDaDZsmi3L99e5g33fBpO2/5BINbvz6tXIrNEK/jKFGDbgHucVulzpLj+Nd/Kj9c20Q aBxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=ZItSW/6WdgwAU12GeExgQqJIUQBumiWmPiFyandvuB8=; b=QP91JrBjChdf2qx+4y+Ul4ztP0dj7aKJxXCL9oPpWIwYVJhLF3XuM3yZ6skCA/KkY2 y6q2kcZJUi4TqwNspCp3x1WcvPUja4oHH9bQFKOO/91W+Lz5/LB96pKOHmKmjHG4mQHm Vn1TabBBn3oLD4wODpYKN7IYXQEAy7DUTulh5k3vyKQoXfOTpRVNb1acTrwIKL/HK6oT M1vQvbi5GFjgjKqYxgDumbVXdGJj92qZ8YQL+SmHy9hLw+DfaystnmbJxzASAjBmdkCh oCFoaCBGKe7JxVa07/XUUv0NwVwEYiEFftFqY1WAlZU09Y1g0+WwatRpEN2urF8stSYW aBVg== X-Gm-Message-State: AG10YOT3+zOk3/bxwZx3MLCE07BCvJDt5uK4WF9YcHrzxZP123IcE7/UeVdeU5PN5ARF6g== X-Received: by 10.28.63.206 with SMTP id m197mr7687109wma.21.1454064172376; Fri, 29 Jan 2016 02:42:52 -0800 (PST) Received: from [192.168.0.9] (5ec0a1a0.skybroadband.com. [94.192.161.160]) by smtp.gmail.com with ESMTPSA id jo6sm15040616wjb.48.2016.01.29.02.42.51 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 29 Jan 2016 02:42:51 -0800 (PST) Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Lars Kurth In-Reply-To: Date: Fri, 29 Jan 2016 10:42:52 +0000 Message-Id: <406515BB-2973-4F6E-9540-F4F49F8A2A58@gmail.com> References: To: xen-devel , mirageos-devel , Win-pv-devel@lists.xenproject.org, embedded-pv-devel@lists.xenproject.org X-Mailer: Apple Mail (2.2104) Cc: xen-users@lists.xenproject.org Subject: Re: [MirageOS-devel] Xen Project Infrastructure Maintenance: xenbits (Jan 28), qemu-bitslave & mail & downloads.xenproject.org (Feb 1), lists & etherpad (Feb 4th) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi all, this is a quick note to let you note that we are deferring the upgrades that were originally planned on Feb 1 and 4th. We ran into some issues with the Jan 28th upgrade, which would occur again. We are working with Rackspace to find a solution that avoids the issues we have seen on the 28th. Once we have a solution, we will re-schedule the planned upgrades. Best Regards Lars > On 27 Jan 2016, at 16:48, Lars Kurth wrote: > > Hi everyone, > > we are rebooting a number of Xen Project services in the next few days to upgrade operating systems. This means that a few services may be temporarily unavailable. The following websites are affected and will be done during the times below. If you notice any issues after the reboot, please reply to this mail or check on the #xeninfra IRC channel. > > = Jan 28, 7am - 9am UTC : affecting xenbits = > Affected services: Xen Project source code repositories, automatically generated xenproject docs, list of security vulnerabilities > If you need to clone or commit to any affected repositories please do so before or after > > = Feb 1, 7am - 9am UTC : affecting qemu-bitslave and xenproject.org mail aliases and downloads.xenproject.org = > Affected services: qemu-bitslave, mail server, DNS and downloads.xenproject.org > Note that mails to e-mails using foo-bar@xenproject.org may be delayed during the maintenance window. > > = Feb 4, 7am - 9am UTC : affecting xen project mailing lists & ether pad = > Affected services: all foo@lists.xenproject.org mailing lists and ether pads > Note that mails to all mailing lists will be delayed during the maintenance window > > Best Regards > Lars _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 29 10:43:06 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 29 Jan 2016 10:43:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aP6W0-0002zz-Rm; Fri, 29 Jan 2016 10:42:56 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aP6Vy-0002zd-RZ; Fri, 29 Jan 2016 10:42:54 +0000 Received: from [85.158.139.211] by server-13.bemta-5.messagelabs.com id CB/28-09478-D224BA65; Fri, 29 Jan 2016 10:42:53 +0000 X-Env-Sender: lars.kurth.xen@gmail.com X-Msg-Ref: server-2.tower-206.messagelabs.com!1454064172!19028662!1 X-Originating-IP: [74.125.82.41] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 47337 invoked from network); 29 Jan 2016 10:42:52 -0000 Received: from mail-wm0-f41.google.com (HELO mail-wm0-f41.google.com) (74.125.82.41) by server-2.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 29 Jan 2016 10:42:52 -0000 Received: by mail-wm0-f41.google.com with SMTP id p63so62543564wmp.1; Fri, 29 Jan 2016 02:42:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=ZItSW/6WdgwAU12GeExgQqJIUQBumiWmPiFyandvuB8=; b=ztnK3dnGl92MPM4Ba9OWtvgqO+JIS8MCPDDKxY6pJ2NWeriW525Mxp6Oq4OnTQ69wb DetpZ02+Gq/i23R1eqLRNupjF28NgkKpqJZ14aVzSGdnu3h1DSHNNv+89V5mMGvC38QO fBtG+3qG7+77V9VdlOwOom1ARTROuiIlSmQFuEut2Ip+JAnr72L2s3RNHlbiDxsoLOUW UMbvN/g+1dsWpaN3iC84WDY8Fs8Rfo6tFq7h4vhxfmyIcoyh/UoRtXQbWqWQFRcCvBKR yFDaDZsmi3L99e5g33fBpO2/5BINbvz6tXIrNEK/jKFGDbgHucVulzpLj+Nd/Kj9c20Q aBxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=ZItSW/6WdgwAU12GeExgQqJIUQBumiWmPiFyandvuB8=; b=QP91JrBjChdf2qx+4y+Ul4ztP0dj7aKJxXCL9oPpWIwYVJhLF3XuM3yZ6skCA/KkY2 y6q2kcZJUi4TqwNspCp3x1WcvPUja4oHH9bQFKOO/91W+Lz5/LB96pKOHmKmjHG4mQHm Vn1TabBBn3oLD4wODpYKN7IYXQEAy7DUTulh5k3vyKQoXfOTpRVNb1acTrwIKL/HK6oT M1vQvbi5GFjgjKqYxgDumbVXdGJj92qZ8YQL+SmHy9hLw+DfaystnmbJxzASAjBmdkCh oCFoaCBGKe7JxVa07/XUUv0NwVwEYiEFftFqY1WAlZU09Y1g0+WwatRpEN2urF8stSYW aBVg== X-Gm-Message-State: AG10YOT3+zOk3/bxwZx3MLCE07BCvJDt5uK4WF9YcHrzxZP123IcE7/UeVdeU5PN5ARF6g== X-Received: by 10.28.63.206 with SMTP id m197mr7687109wma.21.1454064172376; Fri, 29 Jan 2016 02:42:52 -0800 (PST) Received: from [192.168.0.9] (5ec0a1a0.skybroadband.com. [94.192.161.160]) by smtp.gmail.com with ESMTPSA id jo6sm15040616wjb.48.2016.01.29.02.42.51 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 29 Jan 2016 02:42:51 -0800 (PST) Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Lars Kurth In-Reply-To: Date: Fri, 29 Jan 2016 10:42:52 +0000 Message-Id: <406515BB-2973-4F6E-9540-F4F49F8A2A58@gmail.com> References: To: xen-devel , mirageos-devel , Win-pv-devel@lists.xenproject.org, embedded-pv-devel@lists.xenproject.org X-Mailer: Apple Mail (2.2104) Cc: xen-users@lists.xenproject.org Subject: Re: [MirageOS-devel] Xen Project Infrastructure Maintenance: xenbits (Jan 28), qemu-bitslave & mail & downloads.xenproject.org (Feb 1), lists & etherpad (Feb 4th) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org Hi all, this is a quick note to let you note that we are deferring the upgrades that were originally planned on Feb 1 and 4th. We ran into some issues with the Jan 28th upgrade, which would occur again. We are working with Rackspace to find a solution that avoids the issues we have seen on the 28th. Once we have a solution, we will re-schedule the planned upgrades. Best Regards Lars > On 27 Jan 2016, at 16:48, Lars Kurth wrote: > > Hi everyone, > > we are rebooting a number of Xen Project services in the next few days to upgrade operating systems. This means that a few services may be temporarily unavailable. The following websites are affected and will be done during the times below. If you notice any issues after the reboot, please reply to this mail or check on the #xeninfra IRC channel. > > = Jan 28, 7am - 9am UTC : affecting xenbits = > Affected services: Xen Project source code repositories, automatically generated xenproject docs, list of security vulnerabilities > If you need to clone or commit to any affected repositories please do so before or after > > = Feb 1, 7am - 9am UTC : affecting qemu-bitslave and xenproject.org mail aliases and downloads.xenproject.org = > Affected services: qemu-bitslave, mail server, DNS and downloads.xenproject.org > Note that mails to e-mails using foo-bar@xenproject.org may be delayed during the maintenance window. > > = Feb 4, 7am - 9am UTC : affecting xen project mailing lists & ether pad = > Affected services: all foo@lists.xenproject.org mailing lists and ether pads > Note that mails to all mailing lists will be delayed during the maintenance window > > Best Regards > Lars _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 29 15:51:34 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 29 Jan 2016 15:51:34 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aPBKW-0005Mp-CI; 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Fri, 29 Jan 2016 07:51:20 -0800 (PST) Received: by 10.31.130.129 with HTTP; Fri, 29 Jan 2016 07:51:20 -0800 (PST) In-Reply-To: <63.22.05161.678F9A65@epcpsbgx4.samsung.com> References: <63.22.05161.678F9A65@epcpsbgx4.samsung.com> Date: Fri, 29 Jan 2016 15:51:20 +0000 Message-ID: From: Thomas Leonard To: gm0911.park@samsung.com Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] request for solving the problem X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org T24gMjggSmFudWFyeSAyMDE2IGF0IDExOjE2LCDrsJXqsr3rr7wgPGdtMDkxMS5wYXJrQHNhbXN1 bmcuY29tPiB3cm90ZToKPgo+IEhpLAo+Cj4KPgo+IEkgaGFkIHNvbWUgcHJvYmxlbSBhYm91dCBy dW5uaW5nIGRvbSBVCj4KPgo+Cj4gSSByZWZlcmVkIHRvIGh0dHBzOi8vbWlyYWdlLmlvL3dpa2kv eGVuLW9uLWN1YmllYm9hcmQyIGFuZCBiZWxvdyBsb2cgaXMgZnJvbSBteWJvYXJkLgoKVGhvc2Ug aW5zdHJ1Y3Rpb25zIG1heSBiZSBvdXQgb2YgZGF0ZS4gQXJlIHlvdSB1c2luZyB0aGUgaW1hZ2Ug YXQKaHR0cHM6Ly9naXRodWIuY29tL21pcmFnZS94ZW4tYXJtLWJ1aWxkZXIvID8KCj4gTXkgcHJv YmxlbSBpcyB0aGF0IEkgY291bGRuYHQgYWNjZXNzIHRoZSBEb21VIGNvbnNvbGUuCj4KPiBJIHRo aW5rIEl0IGhhcyBhIGJ1Zy4KPgo+Cj4KPiBNYXkgSSBhc2sgd2hpY2ggcG9pbnQgaXMgd3Jvbmc/ Cj4KPgo+Cj4gUmVnYXJkcwo+Cj4gR3l1bmdtaW4KPgo+Cj4KPiBtaXJhZ2VAY3ViaWV0cnVjazp+ JCBzdWRvIHhsIGNyZWF0ZSAtYyBsaW51eC1ndWVzdC0xLmNvbmYKPiBQYXJzaW5nIGNvbmZpZyBm cm9tIGxpbnV4LWd1ZXN0LTEuY29uZgpbLi4uXQo+ICAqIFN0b3BwaW5nIHNhdmUga2VybmVsIG1l c3NhZ2VzICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBbIE9LIF0KPiAg KiBTdGFydGluZyBPcGVuU1NIIHNlcnZlciAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgWyBPSyBdCj4gWyAgNzU3LjA3NTA2OV0gQlVHOiBzb2Z0IGxvY2t1cCAt IENQVSMwIHN0dWNrIGZvciAzNXMhIFtzd2FwcGVyLzA6MF0KCgotLSAKRHIgVGhvbWFzIExlb25h cmQgICAgICAgIGh0dHA6Ly9yb3NjaWR1cy5jb20vYmxvZy8KR1BHOiBEQTk4IDI1QUUgQ0FEMCA4 OTc1IDdDREEgIEJEOEUgMDcxMyAzRjk2IENBNzQgRDhCQQoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1MtZGV2ZWwgbWFpbGluZyBsaXN0Ck1p cmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHA6Ly9saXN0cy54ZW5wcm9qZWN0 Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlzdGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Fri Jan 29 15:51:34 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 29 Jan 2016 15:51:34 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aPBKW-0005Mp-CI; 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Fri, 29 Jan 2016 07:59:41 -0800 (PST) Received: by 10.31.130.129 with HTTP; Fri, 29 Jan 2016 07:59:41 -0800 (PST) In-Reply-To: References: Date: Fri, 29 Jan 2016 15:59:41 +0000 Message-ID: From: Thomas Leonard To: Madhuri Yechuri Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] request for beginner project suggestion X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 28 January 2016 at 05:58, Madhuri Yechuri wrote: > Great, thanks for the quick response! i assume below advice still holds > true, in that case. Yes. > ______ > You could start by cloning the mirage-skeleton repository and making a > new example based on "console" that uses logging rather than printing. > > For modifying libraries, you'll need to know how to "opam pin" a > modified package for testing. There's some useful information here: > > https://www.somerandomidiot.com/blog/2015/11/26/quick-changes-in-mirageos/ > > (however, I find it easier to look in the Makefile to find the > dependencies, rather than reading the source of the mirage tool, and > make sure you do "opam pin -k git" to pin in "mixed mode", or you'll > have endless trouble with stale OASIS files) > ______ > > i can start with > https://github.com/mirage/mirage-net-xen/blob/995bcf518b7c8e41e7db79050948bb7ecc1046b2/lib/frontend.ml#L106 > , as listed in the Pioneer Projects page. > > Is there a recommended regression test set? i looked around > https://mirage.io/wiki/contributing, but couldn't find any pointers. There are no automated tests. Running mirage-skeleton would let you check if it was working. Dave Scott made a branch that allowed mirage-net-xen to run on Unix (by making the Xen stuff abstract), which allowed running unit-tests easily. I think it needs a bit of work to rebase it on master, though: https://github.com/djs55/mirage-net-xen/commits/refactor-modules https://github.com/djs55/mirage-net-xen/blob/refactor-modules/lib_test/test.ml (many of the changes on this branch have already been merged) Some proper integration tests that spin up multiple Xen VMs would be great too. I know this has been discussed a few times, but I'm not sure what the status is. > Thanks a lot! > madhuri. > > On Wed, Jan 27, 2016 at 8:40 AM, Thomas Leonard wrote: >> >> On 27 January 2016 at 16:28, Madhuri Yechuri >> wrote: >> > Hi, >> > >> > i am interested in contributing to MirageOS (during non-work hours), and >> > wondering if there is a beginner project recommendation? This would be >> > my >> > first project in OCAML (have 15 years industry coding experience in C >> > (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and >> > recent 9 >> > months in Python (Flocker)). >> > >> > Looking through >> > https://github.com/mirage/mirage-www/wiki/Pioneer-Projects , >> > i understand Logging is taken from recent emails on this mailing list. >> > Is >> > there is any other beginner-friendly project that i could take up? >> > >> > Thanks a lot! >> > madhuri. >> >> Hi Madhuri, >> >> There are lots of libraries that need improved logging, so as long as >> people say which ones they're working on there should be no problem - >> it would be great if you want to work on that! >> >> >> -- >> Dr Thomas Leonard http://roscidus.com/blog/ >> GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > > -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel From mirageos-devel-bounces@lists.xenproject.org Fri Jan 29 15:59:46 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 29 Jan 2016 15:59:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aPBSc-0005qT-0I; Fri, 29 Jan 2016 15:59:46 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aPBSa-0005qO-GT for mirageos-devel@lists.xenproject.org; Fri, 29 Jan 2016 15:59:44 +0000 Received: from [85.158.139.211] by server-2.bemta-5.messagelabs.com id 9A/E5-21594-F6C8BA65; Fri, 29 Jan 2016 15:59:43 +0000 X-Env-Sender: talex5@gmail.com X-Msg-Ref: server-7.tower-206.messagelabs.com!1454083182!18851694!1 X-Originating-IP: [209.85.213.43] X-SpamReason: No, hits=0.8 required=7.0 tests=BODY_RANDOM_LONG, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 20059 invoked from network); 29 Jan 2016 15:59:42 -0000 Received: from mail-vk0-f43.google.com (HELO mail-vk0-f43.google.com) (209.85.213.43) by server-7.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 29 Jan 2016 15:59:42 -0000 Received: by mail-vk0-f43.google.com with SMTP id n1so44193409vkb.3 for ; Fri, 29 Jan 2016 07:59:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=aiwg8Zyo9sT08O6/9Wq6x3ZEwWQamxnaqtS5+GXSxRQ=; b=YrYCwFPQzOf5cQzlvaBz61kAdUd71ZbeCeoGRAkV5IA0t96D/1SrxWJ5GtbWyqC16+ kJKkxLNd9hz+9y18SF+/La2talpj+WApPFP2SZqtt9tQ5SaUfEgMOKTTXnIeGVXtC+Hm j+AW3OIOYMwRYGVROwGwemLQahTCDk/IS6IX+ThV8ZjDLzZKiNOxDSKY/XLr/p9ywRLQ 4BCLHPC1weoW1ivMLIN6vy19rf13177zYotzp33SrGvecvGnpU/Z4liH4sWhJnnj39Al /nNXFambmvcvGKFn7w7JeILdgYmqIQlq9CwwGaPohAU/E8/hP0+HA//f2Tw9HS4GjwY9 xyXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=aiwg8Zyo9sT08O6/9Wq6x3ZEwWQamxnaqtS5+GXSxRQ=; b=jqcofmfoCBpH360Gkh6LolD8RtYYdM9patvdQjhRXR4TwTTcdU61EeXnkRmZVc33a9 uXXhEbFx7mIiFnenoW0v/wciDId/qTSgsFqPtrKgYomIYiy6PCCsBSp5rUtROPBim3uy n2NEeDT+eY6pP75KXaqQGVsp6b65MDGVrKCjM4ZQeiH8cKR355bfxn8TM+ErbaJAFE/E mOtzQfLhv/zvgXeohv4wOFpCZ0gdn1DloYcElqmlkTLf+Qpq1Bd+fHXzNUCEcXIsKw4D UY7RlM2LwypbMrHPYuAjPFL64l0/R/EAzQK1GLzGDJ6EgQkbTDOhdk7DZnXPtUuEqDRg c72g== X-Gm-Message-State: AG10YOQc9B3M3Huhdh2kfAcs7pXupu1QAFBXJQufz6DHRglA30hlZw1dQPZ8F5xmo3Ffoz4AhhPm0JGK1f8Sdg== MIME-Version: 1.0 X-Received: by 10.31.178.146 with SMTP id b140mr6194268vkf.108.1454083181889; Fri, 29 Jan 2016 07:59:41 -0800 (PST) Received: by 10.31.130.129 with HTTP; Fri, 29 Jan 2016 07:59:41 -0800 (PST) In-Reply-To: References: Date: Fri, 29 Jan 2016 15:59:41 +0000 Message-ID: From: Thomas Leonard To: Madhuri Yechuri Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] request for beginner project suggestion X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: mirageos-devel-bounces@lists.xenproject.org Errors-To: mirageos-devel-bounces@lists.xenproject.org On 28 January 2016 at 05:58, Madhuri Yechuri wrote: > Great, thanks for the quick response! i assume below advice still holds > true, in that case. Yes. > ______ > You could start by cloning the mirage-skeleton repository and making a > new example based on "console" that uses logging rather than printing. > > For modifying libraries, you'll need to know how to "opam pin" a > modified package for testing. There's some useful information here: > > https://www.somerandomidiot.com/blog/2015/11/26/quick-changes-in-mirageos/ > > (however, I find it easier to look in the Makefile to find the > dependencies, rather than reading the source of the mirage tool, and > make sure you do "opam pin -k git" to pin in "mixed mode", or you'll > have endless trouble with stale OASIS files) > ______ > > i can start with > https://github.com/mirage/mirage-net-xen/blob/995bcf518b7c8e41e7db79050948bb7ecc1046b2/lib/frontend.ml#L106 > , as listed in the Pioneer Projects page. > > Is there a recommended regression test set? i looked around > https://mirage.io/wiki/contributing, but couldn't find any pointers. There are no automated tests. Running mirage-skeleton would let you check if it was working. Dave Scott made a branch that allowed mirage-net-xen to run on Unix (by making the Xen stuff abstract), which allowed running unit-tests easily. I think it needs a bit of work to rebase it on master, though: https://github.com/djs55/mirage-net-xen/commits/refactor-modules https://github.com/djs55/mirage-net-xen/blob/refactor-modules/lib_test/test.ml (many of the changes on this branch have already been merged) Some proper integration tests that spin up multiple Xen VMs would be great too. I know this has been discussed a few times, but I'm not sure what the status is. > Thanks a lot! > madhuri. > > On Wed, Jan 27, 2016 at 8:40 AM, Thomas Leonard wrote: >> >> On 27 January 2016 at 16:28, Madhuri Yechuri >> wrote: >> > Hi, >> > >> > i am interested in contributing to MirageOS (during non-work hours), and >> > wondering if there is a beginner project recommendation? This would be >> > my >> > first project in OCAML (have 15 years industry coding experience in C >> > (Oracle Database Server, VMware ESX) and C++ (VMware vCenter), and >> > recent 9 >> > months in Python (Flocker)). >> > >> > Looking through >> > https://github.com/mirage/mirage-www/wiki/Pioneer-Projects , >> > i understand Logging is taken from recent emails on this mailing list. >> > Is >> > there is any other beginner-friendly project that i could take up? >> > >> > Thanks a lot! >> > madhuri. >> >> Hi Madhuri, >> >> There are lots of libraries that need improved logging, so as long as >> people say which ones they're working on there should be no problem - >> it would be great if you want to work on that! >> >> >> -- >> Dr Thomas Leonard http://roscidus.com/blog/ >> GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA > > -- Dr Thomas Leonard http://roscidus.com/blog/ GPG: DA98 25AE CAD0 8975 7CDA BD8E 0713 3F96 CA74 D8BA _______________________________________________ MirageOS-devel mailing list MirageOS-devel@lists.xenproject.org http://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel