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Juergen Gross (2): Mini-OS: 9pfs: add fstat file operation hook Mini-OS: 9pfs: add lseek file operation hook 9pfront.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Thu Mar 20 07:49:35 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 20 Mar 2025 07:49:35 +0000 Received: from list by lists.xenproject.org with outflank-mailman.921380.1325242 (Exim 4.92) (envelope-from ) id 1tvAel-0005MH-LQ; Thu, 20 Mar 2025 07:49:35 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 921380.1325242; Thu, 20 Mar 2025 07:49:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvAel-0005Lo-Hk; Thu, 20 Mar 2025 07:49:35 +0000 Received: by outflank-mailman (input) for mailman id 921380; Thu, 20 Mar 2025 07:49:34 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvAek-00052A-2f for minios-devel@lists.xenproject.org; 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t=1742456971; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ahePrHvNMDs6aD+rN+hONCSWm/iDVIpc4u83RYfjI/k=; b=qIJOu2LwNeUJyADKREUs4uDzRXLn6AZdH5UnmUBRvqUjq/nY/2c2g8Q3FfZpcjGypmm0Km vPXURdsoJUGRbSlNfHx8VBYFfJkRRVpbqsa4IuBrKbHLxi9aE20h8jzDJmncEZFN4dgafG dOAVbjhO6qBl2dqo5OaTfjd8tsLWtKM= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 1/2] 9pfs: add fstat file operation hook Date: Thu, 20 Mar 2025 08:49:23 +0100 Message-ID: <20250320074924.8080-2-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250320074924.8080-1-jgross@suse.com> References: <20250320074924.8080-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: E666D1F7A4 X-Spam-Score: -3.01 X-Rspamd-Action: no action X-Spamd-Result: default: False [-3.01 / 50.00]; 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Signed-off-by: Juergen Gross --- 9pfront.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/9pfront.c b/9pfront.c index 1741d600..a65fe26d 100644 --- a/9pfront.c +++ b/9pfront.c @@ -85,6 +85,8 @@ struct file_9pfs { #define P9_QID_SIZE 13 +#define QID_TYPE_DIR 0x80 /* Applies to qid[0]. */ + struct p9_header { uint32_t size; uint8_t cmd; @@ -950,6 +952,32 @@ static int write_9pfs(struct file *file, const void *buf, size_t nbytes) return ret; } +static int fstat_9pfs(struct file *file, struct stat *buf) +{ + struct file_9pfs *f9pfs = file->filedata; + struct p9_stat stat; + int ret; + + ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); + if ( ret ) + { + errno = EIO; + return -1; + } + + buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; + buf->st_mode = stat.mode & 0777; + buf->st_atime = stat.atime; + buf->st_mtime = stat.mtime; + buf->st_size = stat.length; + buf->st_uid = stat.n_uid; + buf->st_gid = stat.n_gid; + + free_stat(&stat); + + return 0; +} + static int close_9pfs(struct file *file) { struct file_9pfs *f9pfs = file->filedata; @@ -1296,6 +1324,7 @@ static const struct file_ops ops_9pfs = { .read = read_9pfs, .write = write_9pfs, .close = close_9pfs, + .fstat = fstat_9pfs, }; __attribute__((constructor)) -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Thu Mar 20 07:49:41 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 20 Mar 2025 07:49:41 +0000 Received: from list by lists.xenproject.org with outflank-mailman.921384.1325264 (Exim 4.92) (envelope-from ) id 1tvAer-0005tO-1q; Thu, 20 Mar 2025 07:49:41 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 921384.1325264; 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Just use the lseek_default() implementation. Signed-off-by: Juergen Gross --- 9pfront.c | 1 + 1 file changed, 1 insertion(+) diff --git a/9pfront.c b/9pfront.c index a65fe26d..837e404b 100644 --- a/9pfront.c +++ b/9pfront.c @@ -1325,6 +1325,7 @@ static const struct file_ops ops_9pfs = { .write = write_9pfs, .close = close_9pfs, .fstat = fstat_9pfs, + .lseek = lseek_default, }; __attribute__((constructor)) -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Thu Mar 20 14:35:16 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 20 Mar 2025 14:35:16 +0000 Received: from list by lists.xenproject.org with outflank-mailman.922252.1326151 (Exim 4.92) (envelope-from ) id 1tvGzK-0005RG-FP; Thu, 20 Mar 2025 14:35:14 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 922252.1326151; Thu, 20 Mar 2025 14:35:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvGzK-0005R9-CH; Thu, 20 Mar 2025 14:35:14 +0000 Received: by outflank-mailman (input) for mailman id 922252; Thu, 20 Mar 2025 14:35:12 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvGzI-0005Cq-Ns for minios-devel@lists.xenproject.org; Thu, 20 Mar 2025 14:35:12 +0000 Received: from mail-ej1-x62c.google.com (mail-ej1-x62c.google.com [2a00:1450:4864:20::62c]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 870157a0-0598-11f0-9ffa-bf95429c2676; Thu, 20 Mar 2025 15:35:10 +0100 (CET) Received: by mail-ej1-x62c.google.com with SMTP id a640c23a62f3a-ac2af2f15d1so118385566b.1 for ; Thu, 20 Mar 2025 07:35:10 -0700 (PDT) Received: from ?IPV6:2003:e5:873d:1a00:8e99:ce06:aa4a:2e7b? 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Thu, 20 Mar 2025 07:35:09 -0700 (PDT) Message-ID: Date: Thu, 20 Mar 2025 15:35:08 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH 1/2] 9pfs: add fstat file operation hook To: Jason Andryuk , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org References: <20250320074924.8080-1-jgross@suse.com> <20250320074924.8080-2-jgross@suse.com> Content-Language: en-US From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Autocrypt: addr=jgross@suse.com; keydata= xsBNBFOMcBYBCACgGjqjoGvbEouQZw/ToiBg9W98AlM2QHV+iNHsEs7kxWhKMjrioyspZKOB ycWxw3ie3j9uvg9EOB3aN4xiTv4qbnGiTr3oJhkB1gsb6ToJQZ8uxGq2kaV2KL9650I1SJve dYm8Of8Zd621lSmoKOwlNClALZNew72NjJLEzTalU1OdT7/i1TXkH09XSSI8mEQ/ouNcMvIJ NwQpd369y9bfIhWUiVXEK7MlRgUG6MvIj6Y3Am/BBLUVbDa4+gmzDC9ezlZkTZG2t14zWPvx XP3FAp2pkW0xqG7/377qptDmrk42GlSKN4z76ELnLxussxc7I2hx18NUcbP8+uty4bMxABEB AAHNH0p1ZXJnZW4gR3Jvc3MgPGpncm9zc0BzdXNlLmNvbT7CwHkEEwECACMFAlOMcK8CGwMH CwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRCw3p3WKL8TL8eZB/9G0juS/kDY9LhEXseh mE9U+iA1VsLhgDqVbsOtZ/S14LRFHczNd/Lqkn7souCSoyWsBs3/wO+OjPvxf7m+Ef+sMtr0 G5lCWEWa9wa0IXx5HRPW/ScL+e4AVUbL7rurYMfwCzco+7TfjhMEOkC+va5gzi1KrErgNRHH kg3PhlnRY0Udyqx++UYkAsN4TQuEhNN32MvN0Np3WlBJOgKcuXpIElmMM5f1BBzJSKBkW0Jc Wy3h2Wy912vHKpPV/Xv7ZwVJ27v7KcuZcErtptDevAljxJtE7aJG6WiBzm+v9EswyWxwMCIO RoVBYuiocc51872tRGywc03xaQydB+9R7BHPzsBNBFOMcBYBCADLMfoA44MwGOB9YT1V4KCy vAfd7E0BTfaAurbG+Olacciz3yd09QOmejFZC6AnoykydyvTFLAWYcSCdISMr88COmmCbJzn sHAogjexXiif6ANUUlHpjxlHCCcELmZUzomNDnEOTxZFeWMTFF9Rf2k2F0Tl4E5kmsNGgtSa aMO0rNZoOEiD/7UfPP3dfh8JCQ1VtUUsQtT1sxos8Eb/HmriJhnaTZ7Hp3jtgTVkV0ybpgFg w6WMaRkrBh17mV0z2ajjmabB7SJxcouSkR0hcpNl4oM74d2/VqoW4BxxxOD1FcNCObCELfIS auZx+XT6s+CE7Qi/c44ibBMR7hyjdzWbABEBAAHCwF8EGAECAAkFAlOMcBYCGwwACgkQsN6d 1ii/Ey9D+Af/WFr3q+bg/8v5tCknCtn92d5lyYTBNt7xgWzDZX8G6/pngzKyWfedArllp0Pn fgIXtMNV+3t8Li1Tg843EXkP7+2+CQ98MB8XvvPLYAfW8nNDV85TyVgWlldNcgdv7nn1Sq8g HwB2BHdIAkYce3hEoDQXt/mKlgEGsLpzJcnLKimtPXQQy9TxUaLBe9PInPd+Ohix0XOlY+Uk QFEx50Ki3rSDl2Zt2tnkNYKUCvTJq7jvOlaPd6d/W0tZqpyy7KVay+K4aMobDsodB3dvEAs6 ScCnh03dDAFgIq5nsB11j3KPKdVoPlfucX2c7kGNH+LUMbzqV6beIENfNexkOfxHfw== In-Reply-To: Content-Type: multipart/signed; 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name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- wsB5BAABCAAjFiEEhRJncuj2BJSl0Jf3sN6d1ii/Ey8FAmfcJ50FAwAAAAAACgkQsN6d1ii/Ey8U Kgf/ROrqjRvkOwUOfZz3iZT0LZquFHADC5RQTO0qM8jLVkR7ofbuipGo5SseukcfFeH/z8XfT555 /fDiA4FScCgXfmSJSnn4e9SICK3N9FZ3pVtYxHeC6sxpQDqpaC/cuI0s65YvzHVmBo3+tkwX6zX2 XAAsgYqfobXHZdkaXe5QqbLMd4HHlHJIGelPmEAytA1jNzaLgUVCqnDHOYQIxxg+FTWPJR8/rKtH 1QV8N8kCZhH+a3yjFQ10GniRGxEQgtgszlqooZDR0ICd+aJT0KxU54GiwYFapiTUiKVJGyPG7Dun m0W2QbyLcIDA4luHLRGVLIrOtUBj5289T7U3l/WWdw== =apt+ -----END PGP SIGNATURE----- --------------YhfWdGX0olAEptpoR3tggdZo-- From minios-devel-bounces@lists.xenproject.org Fri Mar 21 08:12:30 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 08:12:30 +0000 Received: from list by lists.xenproject.org with outflank-mailman.922316.1326918 (Exim 4.92) (envelope-from ) id 1tvXUT-0008A9-6N; Fri, 21 Mar 2025 08:12:29 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 922316.1326918; 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bh=7lit5FYt34/fMOegMMpetsvbD/eP0pP1zDU5kMObxm0=; b=x0ngjN7WR/IkgkteY0I0GqVLsnPgIoTqWUHT5XzD6XWRp0qPMSckl4P0F4iNTamOL4tncVpHGtXMmBHBT2dyHGj+0MTfzW1JQX+AiPLtrPZH3RxvCv9P7FuGQw+nNVpgvfxrnaiHUriQgDTLml/1O2jb/cPdBUU+FZBnGmGdrD4= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C Message-ID: <262a6cca-9abc-4ca2-8766-d7927f524a40@amd.com> Date: Thu, 20 Mar 2025 10:41:51 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH 1/2] 9pfs: add fstat file operation hook To: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= , , CC: References: <20250320074924.8080-1-jgross@suse.com> <20250320074924.8080-2-jgross@suse.com> Content-Language: en-US From: Jason Andryuk In-Reply-To: Content-Type: text/plain; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Mar 2025 14:41:52.3990 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 262c71ea-3081-4048-07a0-08dd67bd5ab5 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000397AF.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR12MB9214 On 2025-03-20 10:35, Jürgen Groß wrote: > On 20.03.25 15:28, Jason Andryuk wrote: >> On 2025-03-20 03:49, Juergen Gross wrote: >>> Add a file operations fstat hook to the 9pfs frontend. >>> >>> Signed-off-by: Juergen Gross >>> --- >> >>> @@ -950,6 +952,32 @@ static int write_9pfs(struct file *file, const >>> void *buf, size_t nbytes) >>>       return ret; >>>   } >>> +static int fstat_9pfs(struct file *file, struct stat *buf) >>> +{ >>> +    struct file_9pfs *f9pfs = file->filedata; >>> +    struct p9_stat stat; >>> +    int ret; >>> + >>> +    ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); >>> +    if ( ret ) >>> +    { >>> +        errno = EIO; >>> +        return -1; >>> +    } >>> + >>> +    buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; >>> +    buf->st_mode = stat.mode & 0777; >> >> I think you want `|= stat.mode & 0x777` here. > > Indeed. Thanks for catching this one. With that, Reviewed-by: Jason Andryuk Regards, Jason From minios-devel-bounces@lists.xenproject.org Fri Mar 21 08:12:30 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 08:12:30 +0000 Received: from list by lists.xenproject.org with outflank-mailman.922217.1326922 (Exim 4.92) (envelope-from ) id 1tvXUT-00089n-7U; Fri, 21 Mar 2025 08:12:29 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 922217.1326922; Fri, 21 Mar 2025 08:12:29 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvXUS-00089W-UX; Fri, 21 Mar 2025 08:12:28 +0000 Received: by outflank-mailman (input) for mailman id 922217; Thu, 20 Mar 2025 14:32:32 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvGwi-0003df-6h for minios-devel@lists.xenproject.org; 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bh=oym/vjI4zTqLxIyTBUdgzlM8RFBRNdUGdIJPCa5fGac=; b=5j+FjBnpvdpiCi6TsiM7Md9BLQX4LAmKbiKIt3SaaJMzMNYyv1UnOIxvn6eh3eqrm+GeukDI2dDAcs6xGvsoxoFPFvFrKxMi3Qf9mwEyATbuLCb31WK0C17gibnCOzPPlfd/d/w7QmH4sFcmbxpE1feTsJuCSUEbM/6/fe+dchs= X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C Message-ID: <2e1b2f16-4fa5-4e72-9cdf-50da8b8f9ab7@amd.com> Date: Thu, 20 Mar 2025 10:32:17 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH 2/2] 9pfs: add lseek file operation hook To: Juergen Gross , , CC: References: <20250320074924.8080-1-jgross@suse.com> <20250320074924.8080-3-jgross@suse.com> Content-Language: en-US From: Jason Andryuk In-Reply-To: <20250320074924.8080-3-jgross@suse.com> Content-Type: text/plain; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Mar 2025 14:32:24.2104 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 318e42b8-7fa4-446f-7d2d-08dd67bc0811 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00001CE5.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7612 On 2025-03-20 03:49, Juergen Gross wrote: > Add a file operations lseek hook to the 9pfs frontend. Just use the > lseek_default() implementation. > > Signed-off-by: Juergen Gross lseek_default adjusts file->offset, and read_9pfs()/write_9pfs() are already using that. Reviewed-by: Jason Andryuk Regards, Jason From minios-devel-bounces@lists.xenproject.org Fri Mar 21 08:12:30 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 08:12:30 +0000 Received: from list by lists.xenproject.org with outflank-mailman.922180.1326914 (Exim 4.92) (envelope-from ) id 1tvXUT-00089S-13; Fri, 21 Mar 2025 08:12:29 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 922180.1326914; Fri, 21 Mar 2025 08:12:28 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvXUS-00089L-Sx; Fri, 21 Mar 2025 08:12:28 +0000 Received: by outflank-mailman (input) for mailman id 922180; Thu, 20 Mar 2025 14:28:59 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvGtH-0000Lp-BP for minios-devel@lists.xenproject.org; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Mar 2025 14:28:50.8220 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: de6faf38-0a3a-4f00-d83f-08dd67bb88d9 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS3PEPF0000C37C.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB7157 On 2025-03-20 03:49, Juergen Gross wrote: > Add a file operations fstat hook to the 9pfs frontend. > > Signed-off-by: Juergen Gross > --- > @@ -950,6 +952,32 @@ static int write_9pfs(struct file *file, const void *buf, size_t nbytes) > return ret; > } > > +static int fstat_9pfs(struct file *file, struct stat *buf) > +{ > + struct file_9pfs *f9pfs = file->filedata; > + struct p9_stat stat; > + int ret; > + > + ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); > + if ( ret ) > + { > + errno = EIO; > + return -1; > + } > + > + buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; > + buf->st_mode = stat.mode & 0777; I think you want `|= stat.mode & 0x777` here. Regards, Jason From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:25:02 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:25:02 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923431.1326945 (Exim 4.92) (envelope-from ) id 1tvYce-0005cI-H7; Fri, 21 Mar 2025 09:25:00 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923431.1326945; Fri, 21 Mar 2025 09:25:00 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYce-0005cB-EF; Fri, 21 Mar 2025 09:25:00 +0000 Received: by outflank-mailman (input) for mailman id 923431; Fri, 21 Mar 2025 09:24:59 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYcd-0005bg-5t for minios-devel@lists.xenproject.org; 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Fri, 21 Mar 2025 09:24:53 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 594bf3cf-0636-11f0-9ffa-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549094; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=I16Jcmi/tPhnqXbhhvCxsdDEoRl/IPTWj8eh5kJrCns=; b=YerRSN8d/CHlugjy5AfDYQXUyc42ugQfyWlYVwXntkeIdeajs6IgY1kVdWIeiSPBDl0JK0 GbL3VyjIzfAyDOnZVxk3aAAVxR9ByPpxnRzIzrzy+Bx3PrnHIzvAPAwMt5IaIOK1X82Zlh CQF6bRW0j7c5C3Dy/DjYz/5St4yaJlo= Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=YerRSN8d DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549094; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; 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RCVD_COUNT_TWO(0.00)[2]; MIME_TRACE(0.00)[0:+]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; TO_DN_SOME(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:mid,suse.com:dkim,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; DKIM_TRACE(0.00)[suse.com:+] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO X-Spam-Level: Add basic kexec support to Mini-OS for running in x86 PVH mode. With this series applied it is possible to activate another kernel from within Mini-OS. Right now no Xen related teardown is done (so no reset of grant table, event channels, PV devices). These should be added via kexec callbacks which are added as a framework. This is a major building block for support of Xenstore-stubdom live update (in fact I've tested the kexec path to work using the PVH variant of Xenstore-stubdom). Juergen Gross (12): add kexec framework Mini-OS: add final kexec stage mini-os: add elf.h mini-os: analyze new kernel for kexec mini-os: kexec: finalize parameter location and size mini-os: reserve memory below boundary mini-os: kexec: build parameters for new kernel mini-os: kexec: move used pages away for new kernel Mini-OS: mm: change set_readonly() to change_readonly() Mini-OS: kexec: switch read-only area to be writable again mini-os: kexec: add kexec callback functionality mini-os: kexec: do the final kexec step Config.mk | 1 + Makefile | 1 + arch/x86/kexec.c | 273 +++++++++++++++++++++++++++++ arch/x86/minios-x86.lds.S | 16 ++ arch/x86/mm.c | 238 ++++++++++++++++++++------ arch/x86/testbuild/all-no | 1 + arch/x86/testbuild/all-yes | 2 + arch/x86/testbuild/kexec | 4 + arch/x86/x86_hvm.S | 46 +++++ include/elf.h | 340 +++++++++++++++++++++++++++++++++++++ include/kexec.h | 63 +++++++ include/mm.h | 8 + include/x86/os.h | 5 + kexec.c | 253 +++++++++++++++++++++++++++ mm.c | 89 +++++++++- 15 files changed, 1289 insertions(+), 51 deletions(-) create mode 100644 arch/x86/kexec.c create mode 100644 arch/x86/testbuild/kexec create mode 100644 include/elf.h create mode 100644 include/kexec.h create mode 100644 kexec.c -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:25:04 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:25:04 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923433.1326958 (Exim 4.92) (envelope-from ) id 1tvYci-0005uH-Uu; 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bh=+e7f0wzeCQOLRDHTneQRUR5WaCuGPdNCIRfUubr6zrU=; b=APm4rU8EaHwEes9ifhAjt3TksotKCcmzPMSx4HSisyWi5zcqzlTuNpHWiXb0H38MH+poPf Cj4awaIkVx7i8sHTTt9dDbxuVDQRz+XzBLl6/GnwapMjkIq+Ahfwjdbr6Xatk1+7NZ5GgZ yf8Ap4dZlAkmzjQzRqpGRIjSM051SC8= Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549099; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+e7f0wzeCQOLRDHTneQRUR5WaCuGPdNCIRfUubr6zrU=; b=APm4rU8EaHwEes9ifhAjt3TksotKCcmzPMSx4HSisyWi5zcqzlTuNpHWiXb0H38MH+poPf Cj4awaIkVx7i8sHTTt9dDbxuVDQRz+XzBLl6/GnwapMjkIq+Ahfwjdbr6Xatk1+7NZ5GgZ yf8Ap4dZlAkmzjQzRqpGRIjSM051SC8= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 01/12] kexec: add kexec framework Date: Fri, 21 Mar 2025 10:24:40 +0100 Message-ID: <20250321092451.17309-2-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.80 X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:mid,suse.com:email,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO X-Spam-Level: Add a new config option CONFIG_KEXEC for support of kexec-ing into a new mini-os kernel. Add a related kexec.c source and a kexec.h header. For now allow CONFIG_KEXEC to be set only for PVH variant of mini-os. Signed-off-by: Juergen Gross --- Config.mk | 1 + Makefile | 1 + arch/x86/testbuild/all-no | 1 + arch/x86/testbuild/all-yes | 2 ++ arch/x86/testbuild/kexec | 4 +++ include/kexec.h | 7 +++++ kexec.c | 62 ++++++++++++++++++++++++++++++++++++++ 7 files changed, 78 insertions(+) create mode 100644 arch/x86/testbuild/kexec create mode 100644 include/kexec.h create mode 100644 kexec.c diff --git a/Config.mk b/Config.mk index e493533a..e2afb1b4 100644 --- a/Config.mk +++ b/Config.mk @@ -204,6 +204,7 @@ CONFIG-n += CONFIG_LIBXENGUEST CONFIG-n += CONFIG_LIBXENTOOLCORE CONFIG-n += CONFIG_LIBXENTOOLLOG CONFIG-n += CONFIG_LIBXENMANAGE +CONFIG-n += CONFIG_KEXEC # Setting CONFIG_USE_XEN_CONSOLE copies all print output to the Xen emergency # console apart of standard dom0 handled console. CONFIG-n += CONFIG_USE_XEN_CONSOLE diff --git a/Makefile b/Makefile index d094858a..a64913ad 100644 --- a/Makefile +++ b/Makefile @@ -51,6 +51,7 @@ src-y += gntmap.c src-y += gnttab.c src-y += hypervisor.c src-y += kernel.c +src-$(CONFIG_KEXEC) += kexec.c src-y += lock.c src-y += main.c src-y += mm.c diff --git a/arch/x86/testbuild/all-no b/arch/x86/testbuild/all-no index 5b3e99ed..b2ee5ce8 100644 --- a/arch/x86/testbuild/all-no +++ b/arch/x86/testbuild/all-no @@ -18,3 +18,4 @@ CONFIG_LIBXS = n CONFIG_LWIP = n CONFIG_BALLOON = n CONFIG_USE_XEN_CONSOLE = n +CONFIG_KEXEC = n diff --git a/arch/x86/testbuild/all-yes b/arch/x86/testbuild/all-yes index 8ae489a4..99ba75dd 100644 --- a/arch/x86/testbuild/all-yes +++ b/arch/x86/testbuild/all-yes @@ -19,3 +19,5 @@ CONFIG_BALLOON = y CONFIG_USE_XEN_CONSOLE = y # The following are special: they need support from outside CONFIG_LWIP = n +# KEXEC only without PARAVIRT +CONFIG_KEXEC = n diff --git a/arch/x86/testbuild/kexec b/arch/x86/testbuild/kexec new file mode 100644 index 00000000..ea17b4d9 --- /dev/null +++ b/arch/x86/testbuild/kexec @@ -0,0 +1,4 @@ +CONFIG_PARAVIRT = n +CONFIG_BALLOON = y +CONFIG_USE_XEN_CONSOLE = y +CONFIG_KEXEC = y diff --git a/include/kexec.h b/include/kexec.h new file mode 100644 index 00000000..6fd96774 --- /dev/null +++ b/include/kexec.h @@ -0,0 +1,7 @@ +#ifndef _KEXEC_H +#define _KEXEC_H + +int kexec(void *kernel, unsigned long kernel_size, + const char *cmdline); + +#endif /* _KEXEC_H */ diff --git a/kexec.c b/kexec.c new file mode 100644 index 00000000..53528169 --- /dev/null +++ b/kexec.c @@ -0,0 +1,62 @@ +/****************************************************************************** + * kexec.c + * + * Support of kexec (reboot locally into new mini-os kernel). + * + * Copyright (c) 2024, Juergen Gross, SUSE Linux GmbH + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifdef CONFIG_PARAVIRT +#error "kexec support not implemented in PV variant" +#endif + +#include +#include +#include +#include + +/* + * General approach for kexec support (PVH only) is as follows: + * + * - New kernel needs to be in memory in form of a ELF file in a virtual + * memory region. + * - A new start_info structure is constructed in memory with the final + * memory locations included. + * - All memory areas needed for kexec execution are being finalized. + * - From here on a graceful failure is no longer possible. + * - Grants and event channels are torn down. + * - A temporary set of page tables is constructed at a location where it + * doesn't conflict with old and new kernel or start_info. + * - The final kexec execution stage is copied to a memory area below 4G which + * doesn't conflict with the target areas of kernel etc. + * - Cr3 is switched to the new set of page tables. + * - Execution continues in the final execution stage. + * - All data is copied to its final addresses. + * - Processing is switched to 32-bit mode without address translation. + * - The new kernel is activated. + */ + +int kexec(void *kernel, unsigned long kernel_size, + const char *cmdline) +{ + return ENOSYS; +} +EXPORT_SYMBOL(kexec); -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:25:10 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:25:10 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923435.1326962 (Exim 4.92) (envelope-from ) id 1tvYco-00060S-0J; Fri, 21 Mar 2025 09:25:10 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923435.1326962; Fri, 21 Mar 2025 09:25:09 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYcn-00060L-To; Fri, 21 Mar 2025 09:25:09 +0000 Received: by outflank-mailman (input) for mailman id 923435; Fri, 21 Mar 2025 09:25:08 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYcm-0005bg-E4 for minios-devel@lists.xenproject.org; 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Fri, 21 Mar 2025 09:25:04 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 6076a28d-0636-11f0-9ffa-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549106; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6IP6J3kfl4TGG5FGABs3QGnbBU7DiqQjA7lmH2hLfXY=; b=H7XhyrjUW6MgnSryG8LlzLEjDns0ddCUJ118psc3nwGjmUVHwbi8/2VeKyOfDmv6uk2e95 xi4Unk3gJ1x6r/wqMyQBHThqJByR+vUthgF1BVbOTgO3Lb08wis4td8RfeJSlIW5SOvl3p tG/5nDWbtHJm7wNvgzMRApyvw0AJj5U= Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=Do63NN3p DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549105; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6IP6J3kfl4TGG5FGABs3QGnbBU7DiqQjA7lmH2hLfXY=; b=Do63NN3ph9qYPCwxUmOXrG4JfruyEBDHCMH/V7AR1eyijTj4+QrStvaSp/kRySjKVID4Y+ oxxZ2rrQurGslxkp+s5rs4qTWcuAlhpRMzpgOMyCgBm7CE9iC9qASX8s8dmTmfQ/KrwR1f TICHl4TMrOPkzFQHbkaS+5m07NV4YGw= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 02/12] kexec: add final kexec stage Date: Fri, 21 Mar 2025 10:24:41 +0100 Message-ID: <20250321092451.17309-3-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 16C0B1FB6B X-Spam-Level: X-Spamd-Result: default: False [-3.01 / 50.00]; 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Put the code and related data into a dedicated section in order to be able to copy it to another location. For this reason there must be no absolute relocations being used in the code or data. Being functionally related, add a function for adding a final kexec action. Signed-off-by: Juergen Gross --- arch/x86/kexec.c | 109 ++++++++++++++++++++++++++++++++++++++ arch/x86/minios-x86.lds.S | 8 +++ arch/x86/x86_hvm.S | 46 ++++++++++++++++ include/kexec.h | 27 ++++++++++ include/x86/os.h | 5 ++ kexec.c | 22 ++++++++ 6 files changed, 217 insertions(+) create mode 100644 arch/x86/kexec.c diff --git a/arch/x86/kexec.c b/arch/x86/kexec.c new file mode 100644 index 00000000..bf247797 --- /dev/null +++ b/arch/x86/kexec.c @@ -0,0 +1,109 @@ +/****************************************************************************** + * kexec.c + * + * Support of kexec (reboot locally into new mini-os kernel). + * + * Copyright (c) 2024, Juergen Gross, SUSE Linux GmbH + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifdef CONFIG_KEXEC + +#include +#include +#include + +/* + * Final stage of kexec. Copies all data to the final destinations, zeroes + * .bss and activates new kernel. + * Must be called with interrupts off. Stack, code and data must be + * accessible via identity mapped virtual addresses (virt == phys). Copying + * and zeroing is done using virtual addresses. + * No relocations inside the function are allowed, as it is copied to an + * allocated page before being executed. + */ +static void __attribute__((__section__(".text.kexec"))) + kexec_final(struct kexec_action *actions, unsigned long real) +{ + char *src, *dest; + unsigned int a, cnt; + + for ( a = 0; ; a++ ) + { + switch ( actions[a].action ) + { + case KEXEC_COPY: + dest = actions[a].dest; + src = actions[a].src; + for ( cnt = 0; cnt < actions[a].len; cnt++ ) + *dest++ = *src++; + break; + + case KEXEC_ZERO: + dest = actions[a].dest; + for ( cnt = 0; cnt < actions[a].len; cnt++ ) + *dest++ = 0; + break; + + case KEXEC_CALL: + asm("movl %0, %%ebx\n\t" + "movl %1, %%edi\n\t" + "jmp *%2" + :"=m" (actions[a].src), "=m" (actions[a].dest) + :"m" (real)); + break; + } + } +} + +#define KEXEC_STACK_LONGS 8 +static unsigned long __attribute__((__section__(".data.kexec"))) + kexec_stack[KEXEC_STACK_LONGS]; + +static unsigned long get_kexec_addr(void *kexec_page, void *addr) +{ + unsigned long off = (unsigned long)addr - (unsigned long)_kexec_start; + + return (unsigned long)kexec_page + off; +} + +void do_kexec(void *kexec_page) +{ + unsigned long actions; + unsigned long stack; + unsigned long final; + unsigned long phys; + + actions = get_kexec_addr(kexec_page, kexec_actions); + stack = get_kexec_addr(kexec_page, kexec_stack + KEXEC_STACK_LONGS); + final = get_kexec_addr(kexec_page, kexec_final); + phys = get_kexec_addr(kexec_page, kexec_phys); + + memcpy(kexec_page, _kexec_start, KEXEC_SECSIZE); + asm("cli\n\t" + "mov %0, %%"ASM_SP"\n\t" + "mov %1, %%"ASM_ARG1"\n\t" + "mov %2, %%"ASM_ARG2"\n\t" + "jmp *%3" + :"=m" (stack), "=m" (actions), "=m" (phys) + :"m" (final)); +} + +#endif /* CONFIG_KEXEC */ diff --git a/arch/x86/minios-x86.lds.S b/arch/x86/minios-x86.lds.S index 8aae2fd6..83ec41ce 100644 --- a/arch/x86/minios-x86.lds.S +++ b/arch/x86/minios-x86.lds.S @@ -87,6 +87,14 @@ SECTIONS _edata = .; /* End of data section */ + . = ALIGN(8); + _kexec_start = .; /* Kexec relocatable code/data */ + .kexec : { + *(.text.kexec) + *(.data.kexec) + } + _kexec_end = .; + __bss_start = .; /* BSS */ .bss : { *(.bss) diff --git a/arch/x86/x86_hvm.S b/arch/x86/x86_hvm.S index 42a5f02e..e2f82e96 100644 --- a/arch/x86/x86_hvm.S +++ b/arch/x86/x86_hvm.S @@ -85,4 +85,50 @@ page_table_l2: #endif .align __PAGE_SIZE, 0 +#ifdef CONFIG_KEXEC +.section .text.kexec, "ax", @progbits + +/* + * Switch off paging and call new OS for kexec. + * %ebx holds the physical address of the start_info structure + * %edi holds the physical address of the entry point to call + */ +.globl kexec_phys +kexec_phys: + /* Set DS, ES, SS to 0...ffffffff. */ + mov $(GDTE_DS32_DPL0 * 8), %eax + mov %eax, %ds + mov %eax, %es + mov %eax, %ss + +#ifdef __x86_64__ + /* Switch to 32-bit mode. */ + pushq $(GDTE_CS32_DPL0 * 8) + lea cs32_switch(%rip),%edx + push %rdx + lretq + + .code32 +cs32_switch: +#endif + /* Set %cr0 and %cr4 (disables paging). */ + mov $X86_CR0_PE, %eax + mov %eax, %cr0 + mov $0, %eax + mov %eax, %cr4 +#ifdef __x86_64__ + /* Disable 64-bit mode. */ + mov $MSR_EFER, %ecx + rdmsr + btr $_EFER_LME, %eax + wrmsr +#endif + + jmp *%edi + +#ifdef __x86_64__ + .code64 +#endif +#endif /* CONFIG_KEXEC */ + .text diff --git a/include/kexec.h b/include/kexec.h index 6fd96774..722be456 100644 --- a/include/kexec.h +++ b/include/kexec.h @@ -1,7 +1,34 @@ #ifndef _KEXEC_H #define _KEXEC_H +/* One element of kexec actions (last element must have action KEXEC_CALL): */ +struct kexec_action { + enum { + KEXEC_COPY, /* Copy len bytes from src to dest. */ + KEXEC_ZERO, /* Zero len bytes at dest. */ + KEXEC_CALL /* Call dest with paging turned off, param is src. */ + } action; + unsigned int len; + void *dest; + void *src; +}; + +#define KEXEC_MAX_ACTIONS 16 + +extern char _kexec_start[], _kexec_end[]; +extern struct kexec_action kexec_actions[KEXEC_MAX_ACTIONS]; + +int kexec_add_action(int action, void *dest, void *src, unsigned int len); + +#define KEXEC_SECSIZE ((unsigned long)_kexec_end - (unsigned long)_kexec_start) + int kexec(void *kernel, unsigned long kernel_size, const char *cmdline); +/* Initiate final kexec stage. */ +void do_kexec(void *kexec_page); + +/* Assembler code for switching off paging and passing execution to new OS. */ +void kexec_phys(void); + #endif /* _KEXEC_H */ diff --git a/include/x86/os.h b/include/x86/os.h index 0095be13..8a057d81 100644 --- a/include/x86/os.h +++ b/include/x86/os.h @@ -27,6 +27,7 @@ #define MSR_EFER 0xc0000080 #define _EFER_LME 8 /* Long mode enable */ +#define X86_CR0_PE 0x00000001 /* Protected mode enable */ #define X86_CR0_WP 0x00010000 /* Write protect */ #define X86_CR0_PG 0x80000000 /* Paging */ #define X86_CR4_PAE 0x00000020 /* enable physical address extensions */ @@ -64,9 +65,13 @@ #if defined(__i386__) #define __SZ "l" #define __REG "e" +#define ASM_ARG1 "eax" +#define ASM_ARG2 "edx" #else #define __SZ "q" #define __REG "r" +#define ASM_ARG1 "rdi" +#define ASM_ARG2 "rsi" #endif #define ASM_SP __REG"sp" diff --git a/kexec.c b/kexec.c index 53528169..849a98e4 100644 --- a/kexec.c +++ b/kexec.c @@ -60,3 +60,25 @@ int kexec(void *kernel, unsigned long kernel_size, return ENOSYS; } EXPORT_SYMBOL(kexec); + +struct kexec_action __attribute__((__section__(".data.kexec"))) + kexec_actions[KEXEC_MAX_ACTIONS]; +static unsigned int act_idx; + +int kexec_add_action(int action, void *dest, void *src, unsigned int len) +{ + struct kexec_action *act; + + if ( act_idx == KEXEC_MAX_ACTIONS ) + return -ENOSPC; + + act = kexec_actions + act_idx; + act_idx++; + + act->action = action; + act->len = len; + act->dest = dest; + act->src = src; + + return 0; +} -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:25:14 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:25:14 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923441.1326987 (Exim 4.92) (envelope-from ) id 1tvYcs-0006ds-V5; Fri, 21 Mar 2025 09:25:14 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923441.1326987; Fri, 21 Mar 2025 09:25:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYcs-0006dl-RD; 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dkim=pass header.d=suse.com header.s=susede1 header.b=LUIwIFlc DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549110; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iMWRBt5CGXERaPO06Vbkq8ejeIXBFGe0ATkvAiDSWpM=; b=LUIwIFlc/illNUWSIYY2hdD17DWH+AeZXRbkNFdiKaj5kS9nntqRnAzhy/8QG06VJe4tE0 1ceWb+fNBeXQ2WdwRwdjX+OWJHnMcAgMgspdvyrdzf4Y0k4tKNo/zHAY9z+3HVoCtGL5xZ D6CKiZaPY2n+Sd//d0HPJ7lCNSVIyug= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 03/12] add elf.h Date: Fri, 21 Mar 2025 10:24:42 +0100 Message-ID: <20250321092451.17309-4-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 9FBF321CBC X-Spam-Level: X-Spamd-Result: default: False [-3.01 / 50.00]; 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Only the file header and the program header are needed. The main source for those are elfstructs.h and libelf.h from the Xen tree. The license boiler plate of those files is being kept in the resulting header file. Signed-off-by: Juergen Gross --- include/elf.h | 340 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 340 insertions(+) create mode 100644 include/elf.h diff --git a/include/elf.h b/include/elf.h new file mode 100644 index 00000000..35a9c9fe --- /dev/null +++ b/include/elf.h @@ -0,0 +1,340 @@ +#ifndef __ELF_H__ +#define __ELF_H__ +/* + * Copyright (c) 1995, 1996 Erik Theisen. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include + +typedef uint32_t Elf32_Addr; /* Unsigned program address */ +typedef uint32_t Elf32_Off; /* Unsigned file offset */ +typedef uint16_t Elf32_Half; /* Unsigned medium integer */ +typedef uint32_t Elf32_Word; /* Unsigned large integer */ + +typedef uint64_t Elf64_Addr; +typedef uint64_t Elf64_Off; +typedef uint16_t Elf64_Half; +typedef uint32_t Elf64_Word; +typedef uint64_t Elf64_Xword; + +/* Unique build id string format when using --build-id. */ +#define NT_GNU_BUILD_ID 3 + +/* + * e_ident[] identification indexes + * See http://www.caldera.com/developers/gabi/2000-07-17/ch4.eheader.html + */ +#define EI_MAG0 0 /* file ID */ +#define EI_MAG1 1 /* file ID */ +#define EI_MAG2 2 /* file ID */ +#define EI_MAG3 3 /* file ID */ +#define EI_CLASS 4 /* file class */ +#define EI_DATA 5 /* data encoding */ +#define EI_VERSION 6 /* ELF header version */ +#define EI_OSABI 7 /* OS/ABI ID */ +#define EI_ABIVERSION 8 /* ABI version */ +#define EI_PAD 9 /* start of pad bytes */ +#define EI_NIDENT 16 /* Size of e_ident[] */ + +/* e_ident[] magic number */ +#define ELFMAG0 0x7f /* e_ident[EI_MAG0] */ +#define ELFMAG1 'E' /* e_ident[EI_MAG1] */ +#define ELFMAG2 'L' /* e_ident[EI_MAG2] */ +#define ELFMAG3 'F' /* e_ident[EI_MAG3] */ +#define ELFMAG "\177ELF" /* magic */ +#define SELFMAG 4 /* size of magic */ + +/* e_ident[] file class */ +#define ELFCLASSNONE 0 /* invalid */ +#define ELFCLASS32 1 /* 32-bit objs */ +#define ELFCLASS64 2 /* 64-bit objs */ +#define ELFCLASSNUM 3 /* number of classes */ + +/* e_ident[] data encoding */ +#define ELFDATANONE 0 /* invalid */ +#define ELFDATA2LSB 1 /* Little-Endian */ +#define ELFDATA2MSB 2 /* Big-Endian */ +#define ELFDATANUM 3 /* number of data encode defines */ + +/* e_ident[] Operating System/ABI */ +#define ELFOSABI_SYSV 0 /* UNIX System V ABI */ +#define ELFOSABI_NONE 0 /* Same as ELFOSABI_SYSV */ +#define ELFOSABI_HPUX 1 /* HP-UX operating system */ +#define ELFOSABI_NETBSD 2 /* NetBSD */ +#define ELFOSABI_LINUX 3 /* GNU/Linux */ +#define ELFOSABI_HURD 4 /* GNU/Hurd */ +#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */ +#define ELFOSABI_SOLARIS 6 /* Solaris */ +#define ELFOSABI_MONTEREY 7 /* Monterey */ +#define ELFOSABI_IRIX 8 /* IRIX */ +#define ELFOSABI_FREEBSD 9 /* FreeBSD */ +#define ELFOSABI_TRU64 10 /* TRU64 UNIX */ +#define ELFOSABI_MODESTO 11 /* Novell Modesto */ +#define ELFOSABI_OPENBSD 12 /* OpenBSD */ +#define ELFOSABI_ARM 97 /* ARM */ +#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */ + +/* e_ident */ +#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ + (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ + (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ + (ehdr).e_ident[EI_MAG3] == ELFMAG3) + +/* e_flags */ +#define EF_ARM_EABI_MASK 0xff000000 +#define EF_ARM_EABI_UNKNOWN 0x00000000 +#define EF_ARM_EABI_VER1 0x01000000 +#define EF_ARM_EABI_VER2 0x02000000 +#define EF_ARM_EABI_VER3 0x03000000 +#define EF_ARM_EABI_VER4 0x04000000 +#define EF_ARM_EABI_VER5 0x05000000 + +/* ELF Header */ +typedef struct { + unsigned char e_ident[EI_NIDENT]; /* ELF Identification */ + Elf32_Half e_type; /* object file type */ + Elf32_Half e_machine; /* machine */ + Elf32_Word e_version; /* object file version */ + Elf32_Addr e_entry; /* virtual entry point */ + Elf32_Off e_phoff; /* program header table offset */ + Elf32_Off e_shoff; /* section header table offset */ + Elf32_Word e_flags; /* processor-specific flags */ + Elf32_Half e_ehsize; /* ELF header size */ + Elf32_Half e_phentsize; /* program header entry size */ + Elf32_Half e_phnum; /* number of program header entries */ + Elf32_Half e_shentsize; /* section header entry size */ + Elf32_Half e_shnum; /* number of section header entries */ + Elf32_Half e_shstrndx; /* section header table's "section + header string table" entry offset */ +} Elf32_Ehdr; + +typedef struct { + unsigned char e_ident[EI_NIDENT]; /* Id bytes */ + Elf64_Half e_type; /* file type */ + Elf64_Half e_machine; /* machine type */ + Elf64_Word e_version; /* version number */ + Elf64_Addr e_entry; /* entry point */ + Elf64_Off e_phoff; /* Program hdr offset */ + Elf64_Off e_shoff; /* Section hdr offset */ + Elf64_Word e_flags; /* Processor flags */ + Elf64_Half e_ehsize; /* sizeof ehdr */ + Elf64_Half e_phentsize; /* Program header entry size */ + Elf64_Half e_phnum; /* Number of program headers */ + Elf64_Half e_shentsize; /* Section header entry size */ + Elf64_Half e_shnum; /* Number of section headers */ + Elf64_Half e_shstrndx; /* String table index */ +} Elf64_Ehdr; + +/* e_type */ +#define ET_NONE 0 /* No file type */ +#define ET_REL 1 /* relocatable file */ +#define ET_EXEC 2 /* executable file */ +#define ET_DYN 3 /* shared object file */ +#define ET_CORE 4 /* core file */ +#define ET_NUM 5 /* number of types */ +#define ET_LOPROC 0xff00 /* reserved range for processor */ +#define ET_HIPROC 0xffff /* specific e_type */ + +/* e_machine */ +#define EM_NONE 0 /* No Machine */ +#define EM_M32 1 /* AT&T WE 32100 */ +#define EM_SPARC 2 /* SPARC */ +#define EM_386 3 /* Intel 80386 */ +#define EM_68K 4 /* Motorola 68000 */ +#define EM_88K 5 /* Motorola 88000 */ +#define EM_486 6 /* Intel 80486 - unused? */ +#define EM_860 7 /* Intel 80860 */ +#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ +/* + * Don't know if EM_MIPS_RS4_BE, + * EM_SPARC64, EM_PARISC, + * or EM_PPC are ABI compliant + */ +#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ +#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */ +#define EM_PARISC 15 /* HPPA */ +#define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */ +#define EM_PPC 20 /* PowerPC */ +#define EM_PPC64 21 /* PowerPC 64-bit */ +#define EM_ARM 40 /* Advanced RISC Machines ARM */ +#define EM_ALPHA 41 /* DEC ALPHA */ +#define EM_SPARCV9 43 /* SPARC version 9 */ +#define EM_ALPHA_EXP 0x9026 /* DEC ALPHA */ +#define EM_IA_64 50 /* Intel Merced */ +#define EM_X86_64 62 /* AMD x86-64 architecture */ +#define EM_VAX 75 /* DEC VAX */ +#define EM_AARCH64 183 /* ARM 64-bit */ + +/* Version */ +#define EV_NONE 0 /* Invalid */ +#define EV_CURRENT 1 /* Current */ +#define EV_NUM 2 /* number of versions */ + +/* Program Header */ +typedef struct { + Elf32_Word p_type; /* segment type */ + Elf32_Off p_offset; /* segment offset */ + Elf32_Addr p_vaddr; /* virtual address of segment */ + Elf32_Addr p_paddr; /* physical address - ignored? */ + Elf32_Word p_filesz; /* number of bytes in file for seg. */ + Elf32_Word p_memsz; /* number of bytes in mem. for seg. */ + Elf32_Word p_flags; /* flags */ + Elf32_Word p_align; /* memory alignment */ +} Elf32_Phdr; + +typedef struct { + Elf64_Word p_type; /* entry type */ + Elf64_Word p_flags; /* flags */ + Elf64_Off p_offset; /* offset */ + Elf64_Addr p_vaddr; /* virtual address */ + Elf64_Addr p_paddr; /* physical address */ + Elf64_Xword p_filesz; /* file size */ + Elf64_Xword p_memsz; /* memory size */ + Elf64_Xword p_align; /* memory & file alignment */ +} Elf64_Phdr; + +/* Segment types - p_type */ +#define PT_NULL 0 /* unused */ +#define PT_LOAD 1 /* loadable segment */ +#define PT_DYNAMIC 2 /* dynamic linking section */ +#define PT_INTERP 3 /* the RTLD */ +#define PT_NOTE 4 /* auxiliary information */ +#define PT_SHLIB 5 /* reserved - purpose undefined */ +#define PT_PHDR 6 /* program header */ +#define PT_NUM 7 /* Number of segment types */ +#define PT_LOPROC 0x70000000 /* reserved range for processor */ +#define PT_HIPROC 0x7fffffff /* specific segment types */ + +/* Segment flags - p_flags */ +#define PF_X 0x1 /* Executable */ +#define PF_W 0x2 /* Writable */ +#define PF_R 0x4 /* Readable */ +#define PF_MASKPROC 0xf0000000 /* reserved bits for processor */ + /* specific segment flags */ + +/* Section Header */ +typedef struct { + Elf32_Word sh_name; /* name - index into section header + string table section */ + Elf32_Word sh_type; /* type */ + Elf32_Word sh_flags; /* flags */ + Elf32_Addr sh_addr; /* address */ + Elf32_Off sh_offset; /* file offset */ + Elf32_Word sh_size; /* section size */ + Elf32_Word sh_link; /* section header table index link */ + Elf32_Word sh_info; /* extra information */ + Elf32_Word sh_addralign; /* address alignment */ + Elf32_Word sh_entsize; /* section entry size */ +} Elf32_Shdr; + +typedef struct { + Elf64_Word sh_name; /* section name */ + Elf64_Word sh_type; /* section type */ + Elf64_Xword sh_flags; /* section flags */ + Elf64_Addr sh_addr; /* virtual address */ + Elf64_Off sh_offset; /* file offset */ + Elf64_Xword sh_size; /* section size */ + Elf64_Word sh_link; /* link to another */ + Elf64_Word sh_info; /* misc info */ + Elf64_Xword sh_addralign; /* memory alignment */ + Elf64_Xword sh_entsize; /* table entry size */ +} Elf64_Shdr; + +/* sh_type */ +#define SHT_NULL 0 /* inactive */ +#define SHT_PROGBITS 1 /* program defined information */ +#define SHT_SYMTAB 2 /* symbol table section */ +#define SHT_STRTAB 3 /* string table section */ +#define SHT_RELA 4 /* relocation section with addends*/ +#define SHT_HASH 5 /* symbol hash table section */ +#define SHT_DYNAMIC 6 /* dynamic section */ +#define SHT_NOTE 7 /* note section */ +#define SHT_NOBITS 8 /* no space section */ +#define SHT_REL 9 /* relation section without addends */ +#define SHT_SHLIB 10 /* reserved - purpose unknown */ +#define SHT_DYNSYM 11 /* dynamic symbol table section */ +#define SHT_NUM 12 /* number of section types */ + +/* Note definitions */ +typedef struct { + Elf32_Word namesz; + Elf32_Word descsz; + Elf32_Word type; + char data[]; +} Elf32_Note; + +typedef struct { + Elf64_Word namesz; + Elf64_Word descsz; + Elf64_Word type; + char data[]; +} Elf64_Note; + +/* Abstraction layer for handling 32- and 64-bit ELF files. */ + +typedef union { + Elf32_Ehdr e32; + Elf64_Ehdr e64; +} elf_ehdr; + +static inline bool elf_is_32bit(elf_ehdr *ehdr) +{ + return ehdr->e32.e_ident[EI_CLASS] == ELFCLASS32; +} + +static inline bool elf_is_64bit(elf_ehdr *ehdr) +{ + return ehdr->e32.e_ident[EI_CLASS] == ELFCLASS64; +} + +#define ehdr_val(ehdr, elem) (elf_is_32bit(ehdr) ? (ehdr)->e32.elem : (ehdr)->e64.elem) + +typedef union { + Elf32_Phdr e32; + Elf64_Phdr e64; +} elf_phdr; + +#define phdr_val(ehdr, phdr, elem) (elf_is_32bit(ehdr) ? (phdr)->e32.elem : (phdr)->e64.elem) + +typedef union { + Elf32_Shdr e32; + Elf64_Shdr e64; +} elf_shdr; + +#define shdr_val(ehdr, shdr, elem) (elf_is_32bit(ehdr) ? (shdr)->e32.elem : (shdr)->e64.elem) + +typedef union { + Elf32_Note e32; + Elf64_Note e64; +} elf_note; + +#define note_val(ehdr, note, elem) (elf_is_32bit(ehdr) ? (note)->e32.elem : (note)->e64.elem) + +static inline void *elf_ptr_add(void *ptr, unsigned long add) +{ + return (char *)ptr + add; +} +#endif /* __ELF_H__ */ -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:25:19 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:25:19 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923447.1327001 (Exim 4.92) (envelope-from ) id 1tvYcx-00074F-Ho; Fri, 21 Mar 2025 09:25:19 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923447.1327001; Fri, 21 Mar 2025 09:25:19 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYcx-000745-Dy; Fri, 21 Mar 2025 09:25:19 +0000 Received: by outflank-mailman (input) for mailman id 923447; Fri, 21 Mar 2025 09:25:18 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYcw-0005bg-4S for minios-devel@lists.xenproject.org; Fri, 21 Mar 2025 09:25:18 +0000 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 665fdec4-0636-11f0-9ffa-bf95429c2676; Fri, 21 Mar 2025 10:25:16 +0100 (CET) Received: from imap1.dmz-prg2.suse.org (unknown [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 3720221CE7; Fri, 21 Mar 2025 09:25:16 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 0D1C2139AA; Fri, 21 Mar 2025 09:25:16 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id pmjNAXww3WcdGQAAD6G6ig (envelope-from ); Fri, 21 Mar 2025 09:25:16 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 665fdec4-0636-11f0-9ffa-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549116; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0vBbPFLMY7oD9agHffp6bnrvaZ2naPaltAc0NWccekA=; b=etwLehUUcpE9K+mimpI9086gTMKc1HMThW/afVC+M7vBlWtnSj/LpAcHQ/qmFAdcTjx/qE efyp09ZynVcQts6F11j2JP0CFUzhqy9vGqtT/bI+YA2lKHPfYPPgbWHod6IdFItZQ0HG0z Y3ebBwohzBore2u/Wedy95qu3lSQwNE= Authentication-Results: smtp-out1.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549116; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0vBbPFLMY7oD9agHffp6bnrvaZ2naPaltAc0NWccekA=; b=etwLehUUcpE9K+mimpI9086gTMKc1HMThW/afVC+M7vBlWtnSj/LpAcHQ/qmFAdcTjx/qE efyp09ZynVcQts6F11j2JP0CFUzhqy9vGqtT/bI+YA2lKHPfYPPgbWHod6IdFItZQ0HG0z Y3ebBwohzBore2u/Wedy95qu3lSQwNE= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 04/12] kexec: analyze new kernel for kexec Date: Fri, 21 Mar 2025 10:24:43 +0100 Message-ID: <20250321092451.17309-5-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.80 X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:mid,suse.com:email,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO X-Spam-Level: Analyze the properties of the new kernel to be loaded by kexec. The data needed is: - upper boundary in final location - copy and memory clear operations - entry point and entry parameter Signed-off-by: Juergen Gross --- arch/x86/kexec.c | 91 +++++++++++++++++++++++++++++++++++ include/kexec.h | 11 +++++ kexec.c | 120 ++++++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 220 insertions(+), 2 deletions(-) diff --git a/arch/x86/kexec.c b/arch/x86/kexec.c index bf247797..2069f3c6 100644 --- a/arch/x86/kexec.c +++ b/arch/x86/kexec.c @@ -28,8 +28,15 @@ #include #include +#include +#include #include +#include +#include + +static unsigned long kernel_entry = ~0UL; + /* * Final stage of kexec. Copies all data to the final destinations, zeroes * .bss and activates new kernel. @@ -106,4 +113,88 @@ void do_kexec(void *kexec_page) :"m" (final)); } +bool kexec_chk_arch(elf_ehdr *ehdr) +{ + return ehdr->e32.e_machine == EM_386 || ehdr->e32.e_machine == EM_X86_64; +} + +static unsigned int note_data_sz(unsigned int sz) +{ + return (sz + 3) & ~3; +} + +static void check_notes_entry(elf_ehdr *ehdr, void *start, unsigned int len) +{ + elf_note *note = start; + unsigned int off, note_len, namesz, descsz; + char *val; + + for ( off = 0; off < len; off += note_len ) + { + namesz = note_data_sz(note_val(ehdr, note, namesz)); + descsz = note_data_sz(note_val(ehdr, note, descsz)); + val = note_val(ehdr, note, data); + note_len = val - (char *)note + namesz + descsz; + + if ( !strncmp(val, "Xen", namesz) && + note_val(ehdr, note, type) == XEN_ELFNOTE_PHYS32_ENTRY ) + { + val += namesz; + switch ( note_val(ehdr, note, descsz) ) + { + case 1: + kernel_entry = *(uint8_t *)val; + return; + case 2: + kernel_entry = *(uint16_t *)val; + return; + case 4: + kernel_entry = *(uint32_t *)val; + return; + case 8: + kernel_entry = *(uint64_t *)val; + return; + default: + break; + } + } + + note = elf_ptr_add(note, note_len); + } +} + +int kexec_arch_analyze_phdr(elf_ehdr *ehdr, elf_phdr *phdr) +{ + void *notes_start; + unsigned int notes_len; + + if ( phdr_val(ehdr, phdr, p_type) != PT_NOTE || kernel_entry != ~0UL ) + return 0; + + notes_start = elf_ptr_add(ehdr, phdr_val(ehdr, phdr, p_offset)); + notes_len = phdr_val(ehdr, phdr, p_filesz); + check_notes_entry(ehdr, notes_start, notes_len); + + return 0; +} + +int kexec_arch_analyze_shdr(elf_ehdr *ehdr, elf_shdr *shdr) +{ + void *notes_start; + unsigned int notes_len; + + if ( shdr_val(ehdr, shdr, sh_type) != SHT_NOTE || kernel_entry != ~0UL ) + return 0; + + notes_start = elf_ptr_add(ehdr, shdr_val(ehdr, shdr, sh_offset)); + notes_len = shdr_val(ehdr, shdr, sh_size); + check_notes_entry(ehdr, notes_start, notes_len); + + return 0; +} + +bool kexec_arch_need_analyze_shdrs(void) +{ + return kernel_entry == ~0UL; +} #endif /* CONFIG_KEXEC */ diff --git a/include/kexec.h b/include/kexec.h index 722be456..f54cbb90 100644 --- a/include/kexec.h +++ b/include/kexec.h @@ -1,5 +1,6 @@ #ifndef _KEXEC_H #define _KEXEC_H +#include /* One element of kexec actions (last element must have action KEXEC_CALL): */ struct kexec_action { @@ -18,6 +19,8 @@ struct kexec_action { extern char _kexec_start[], _kexec_end[]; extern struct kexec_action kexec_actions[KEXEC_MAX_ACTIONS]; +extern unsigned long kexec_last_addr; + int kexec_add_action(int action, void *dest, void *src, unsigned int len); #define KEXEC_SECSIZE ((unsigned long)_kexec_end - (unsigned long)_kexec_start) @@ -31,4 +34,12 @@ void do_kexec(void *kexec_page); /* Assembler code for switching off paging and passing execution to new OS. */ void kexec_phys(void); +/* Check kernel to match current architecture. */ +bool kexec_chk_arch(elf_ehdr *ehdr); + +/* Architecture specific ELF handling functions. */ +int kexec_arch_analyze_phdr(elf_ehdr *ehdr, elf_phdr *phdr); +int kexec_arch_analyze_shdr(elf_ehdr *ehdr, elf_shdr *shdr); +bool kexec_arch_need_analyze_shdrs(void); + #endif /* _KEXEC_H */ diff --git a/kexec.c b/kexec.c index 849a98e4..3ff4ea07 100644 --- a/kexec.c +++ b/kexec.c @@ -31,6 +31,9 @@ #include #include #include +#include +#include +#include #include /* @@ -54,9 +57,122 @@ * - The new kernel is activated. */ -int kexec(void *kernel, unsigned long kernel_size, - const char *cmdline) +unsigned long kexec_last_addr; + +static int analyze_phdrs(elf_ehdr *ehdr) +{ + elf_phdr *phdr; + unsigned int n_hdr, i; + unsigned long paddr, offset, filesz, memsz; + int ret; + + phdr = elf_ptr_add(ehdr, ehdr_val(ehdr, e_phoff)); + n_hdr = ehdr_val(ehdr, e_phnum); + for ( i = 0; i < n_hdr; i++ ) + { + ret = kexec_arch_analyze_phdr(ehdr, phdr); + if ( ret ) + return ret; + + if ( phdr_val(ehdr, phdr, p_type) == PT_LOAD && + (phdr_val(ehdr, phdr, p_flags) & (PF_X | PF_W | PF_R)) ) + { + paddr = phdr_val(ehdr, phdr, p_paddr); + offset = phdr_val(ehdr, phdr, p_offset); + filesz = phdr_val(ehdr, phdr, p_filesz); + memsz = phdr_val(ehdr, phdr, p_memsz); + if ( filesz > 0 ) + { + ret = kexec_add_action(KEXEC_COPY, to_virt(paddr), + (char *)ehdr + offset, filesz); + if ( ret ) + return ret; + } + if ( memsz > filesz ) + { + ret = kexec_add_action(KEXEC_ZERO, to_virt(paddr + filesz), + NULL, memsz - filesz); + if ( ret ) + return ret; + } + if ( paddr + memsz > kexec_last_addr ) + kexec_last_addr = paddr + memsz; + } + + phdr = elf_ptr_add(phdr, ehdr_val(ehdr, e_phentsize)); + } + + return 0; +} + +static int analyze_shdrs(elf_ehdr *ehdr) { + elf_shdr *shdr; + unsigned int n_hdr, i; + int ret; + + if ( !kexec_arch_need_analyze_shdrs() ) + return 0; + + shdr = elf_ptr_add(ehdr, ehdr_val(ehdr, e_shoff)); + n_hdr = ehdr_val(ehdr, e_shnum); + for ( i = 0; i < n_hdr; i++ ) + { + ret = kexec_arch_analyze_shdr(ehdr, shdr); + if ( ret ) + return ret; + + shdr = elf_ptr_add(shdr, ehdr_val(ehdr, e_shentsize)); + } + + return 0; +} + +static int analyze_kernel(void *kernel, unsigned long size) +{ + elf_ehdr *ehdr = kernel; + int ret; + + if ( !IS_ELF(ehdr->e32) ) + { + printk("kexec: new kernel not an ELF file\n"); + return ENOEXEC; + } + if ( ehdr->e32.e_ident[EI_DATA] != ELFDATA2LSB ) + { + printk("kexec: ELF file of new kernel is big endian\n"); + return ENOEXEC; + } + if ( !elf_is_32bit(ehdr) && !elf_is_64bit(ehdr) ) + { + printk("kexec: ELF file of new kernel is neither 32 nor 64 bit\n"); + return ENOEXEC; + } + if ( !kexec_chk_arch(ehdr) ) + { + printk("kexec: ELF file of new kernel is not compatible with arch\n"); + return ENOEXEC; + } + + ret = analyze_phdrs(ehdr); + if ( ret ) + return ret; + + ret = analyze_shdrs(ehdr); + if ( ret ) + return ret; + + return 0; +} + +int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) +{ + int ret; + + ret = analyze_kernel(kernel, kernel_size); + if ( ret ) + return ret; + return ENOSYS; } EXPORT_SYMBOL(kexec); -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:30:35 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:30:35 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923500.1327014 (Exim 4.92) (envelope-from ) id 1tvYi2-0001Zu-6s; 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bh=r/E0X4kSUTS2znnNR4n/sGL9TrcJRaZCvVETFzkF9nM=; b=B9L4X8b0LyO+EsipPNlntdT73kCehyLOksZWhkXn2oV7P0F+Ved1AuISyTTvnPNcGtyWjG 8XlL+RXUSya0e5McIEbkE4PW3GrS5sJrP/asVGdHmreh428P0qqcwpiILMGhYRw6cSEf1u 0+BBYX1DtoyacMRW0LuCzS0HBjP1ghg= Authentication-Results: smtp-out1.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=PYWAJsv9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549160; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=r/E0X4kSUTS2znnNR4n/sGL9TrcJRaZCvVETFzkF9nM=; b=PYWAJsv9HFIHul3JqVAaDZ1tmb5ZgFhgRrgUYP2DuA6/twlMt+En73LQytp0UgOGc6Mzxc LtT4+HIzyCyzFix3Ejf73UZ82Qj/Reu/G/fumaSqvhhEzQuTPXWkBk6rktYD9NWuKgkLRj UVfkiTgNh/NBiRdXICFFtp8hYFF+m74= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 12/12] kexec: do the final kexec step Date: Fri, 21 Mar 2025 10:24:51 +0100 Message-ID: <20250321092451.17309-13-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: EAAA721D79 X-Spam-Level: X-Spamd-Result: default: False [-3.01 / 50.00]; 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Signed-off-by: Juergen Gross --- kexec.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/kexec.c b/kexec.c index 2db876e8..85b09959 100644 --- a/kexec.c +++ b/kexec.c @@ -169,6 +169,7 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) { int ret; unsigned long *func; + void *kexec_page; ret = analyze_kernel(kernel, kernel_size); if ( ret ) @@ -192,6 +193,13 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) if ( ret ) goto err; + kexec_page = (void *)alloc_page(); + if ( !kexec_page ) + { + ret = ENOMEM; + goto err; + } + for ( func = __kexec_array_start; func < __kexec_array_end; func++ ) { ret = ((kexeccall_t)(*func))(false); @@ -204,10 +212,15 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) } } - /* Error exit. */ - ret = ENOSYS; + /* Activate the new kernel. */ + do_kexec(kexec_page); + + /* do_kexec() shouldn't return, crash. */ + BUG(); err: + if ( kexec_page ) + free_page(kexec_page); change_readonly(true); unreserve_memory_below(); kexec_move_used_pages_undo(); -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:30:36 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:30:36 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923503.1327018 (Exim 4.92) (envelope-from ) id 1tvYi4-0001jt-8M; Fri, 21 Mar 2025 09:30:36 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923503.1327018; Fri, 21 Mar 2025 09:30:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYi4-0001jm-5Q; Fri, 21 Mar 2025 09:30:36 +0000 Received: by outflank-mailman (input) for mailman id 923503; Fri, 21 Mar 2025 09:30:34 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYdE-0005bg-80 for minios-devel@lists.xenproject.org; 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Fri, 21 Mar 2025 09:25:32 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 70649efb-0636-11f0-9ffa-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549133; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=s0cAXUGvY2JO8hs7cJ+YxtNj8pT0pZocSXr5L9ANRiA=; b=QtBribMyufGB5ILmwzr6caAIVoFJ8uifU4I8dk5hYcJ+b5HF1AbZ1gNeKOvmfgnXIVh+pi bi4Fv7jSzJ6L8BMTQIac01o9mZi9obMdQmEexOfhSNhW2DDWAwxat/q3wOsTyQ5HIGlZ/O c/NDQDexEZMk7sPqfRLAgcH/7ayr2PA= Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=QtBribMy DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549133; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=s0cAXUGvY2JO8hs7cJ+YxtNj8pT0pZocSXr5L9ANRiA=; b=QtBribMyufGB5ILmwzr6caAIVoFJ8uifU4I8dk5hYcJ+b5HF1AbZ1gNeKOvmfgnXIVh+pi bi4Fv7jSzJ6L8BMTQIac01o9mZi9obMdQmEexOfhSNhW2DDWAwxat/q3wOsTyQ5HIGlZ/O c/NDQDexEZMk7sPqfRLAgcH/7ayr2PA= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 07/12] kexec: build parameters for new kernel Date: Fri, 21 Mar 2025 10:24:46 +0100 Message-ID: <20250321092451.17309-8-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 0B6241FB6B X-Spam-Score: -3.01 X-Rspamd-Action: no action X-Spamd-Result: default: False [-3.01 / 50.00]; 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Signed-off-by: Juergen Gross --- arch/x86/kexec.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++ include/kexec.h | 4 ++++ kexec.c | 13 ++++++++++- 3 files changed, 74 insertions(+), 1 deletion(-) diff --git a/arch/x86/kexec.c b/arch/x86/kexec.c index 98a478d3..6fc7d02d 100644 --- a/arch/x86/kexec.c +++ b/arch/x86/kexec.c @@ -200,6 +200,7 @@ bool kexec_arch_need_analyze_shdrs(void) static unsigned long kexec_param_loc; static unsigned int kexec_param_size; +static unsigned long kexec_param_mem; void kexec_set_param_loc(const char *cmdline) { @@ -212,4 +213,61 @@ void kexec_set_param_loc(const char *cmdline) kexec_last_addr += kexec_param_size; kexec_last_addr = round_pgup(kexec_last_addr); } + +int kexec_get_entry(const char *cmdline) +{ + struct hvm_start_info *info; + struct hvm_memmap_table_entry *mmap; + unsigned int order; + unsigned int i; + + if ( kernel_entry == ~0UL ) + return ENOEXEC; + + order = get_order(kexec_param_size); + + kexec_param_mem = alloc_pages(order); + if ( !kexec_param_mem ) + return ENOMEM; + + info = (struct hvm_start_info *)kexec_param_mem; + memset(info, 0, sizeof(*info)); + info->magic = XEN_HVM_START_MAGIC_VALUE; + info->version = 1; + info->cmdline_paddr = kexec_param_mem + sizeof(*info) + + e820_entries * sizeof(struct hvm_memmap_table_entry); + info->memmap_paddr = kexec_param_mem + sizeof(*info); + info->memmap_entries = e820_entries; + + mmap = (struct hvm_memmap_table_entry *)(info + 1); + for ( i = 0; i < e820_entries; i++ ) + { + mmap->addr = e820_map[i].addr; + mmap->size = e820_map[i].size; + mmap->type = e820_map[i].type; + mmap++; + } + + strcpy((char *)mmap, cmdline); + + if ( kexec_add_action(KEXEC_COPY, to_virt(kexec_param_loc), info, + kexec_param_size) ) + return ENOSPC; + + /* The call of the new kernel happens via the physical address! */ + if ( kexec_add_action(KEXEC_CALL, (void *)kernel_entry, + (void *)kexec_param_loc, 0) ) + return ENOSPC; + + return 0; +} + +void kexec_get_entry_undo(void) +{ + if ( kexec_param_mem ) + { + free_pages((void *)kexec_param_mem, get_order(kexec_param_size)); + kexec_param_mem = 0; + } +} #endif /* CONFIG_KEXEC */ diff --git a/include/kexec.h b/include/kexec.h index 8a2b552f..7b103dea 100644 --- a/include/kexec.h +++ b/include/kexec.h @@ -45,4 +45,8 @@ bool kexec_arch_need_analyze_shdrs(void); /* Finalize parameter location and size. */ void kexec_set_param_loc(const char *cmdline); +/* Get entry point and parameter of new kernel. */ +int kexec_get_entry(const char *cmdline); +void kexec_get_entry_undo(void); + #endif /* _KEXEC_H */ diff --git a/kexec.c b/kexec.c index 68457711..0ef8eb35 100644 --- a/kexec.c +++ b/kexec.c @@ -177,10 +177,21 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) reserve_memory_below(kexec_last_addr); + ret = kexec_get_entry(cmdline); + if ( ret ) + { + printk("kexec: ELF file of new kernel has no valid entry point\n"); + goto err; + } + /* Error exit. */ + ret = ENOSYS; + + err: unreserve_memory_below(); + kexec_get_entry_undo(); - return ENOSYS; + return ret; } EXPORT_SYMBOL(kexec); -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:30:46 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:30:46 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923526.1327073 (Exim 4.92) (envelope-from ) id 1tvYiD-0003LI-V6; 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bh=az01uiRxZtSFbNJFwjD4ZM6qRoCac3SGJkFv8ewEX5o=; b=eTNNX0m1tYtAi5BKKmCwBN2rP24FpQKgSrmuEPgs6l5tTOSqsceo5LrQL2fOTHfRlM7Bu6 3KTILh3e01B2TODpq+H7GMxFBTy5HuDzHFSRQ3VQ7EF1OwJ/uPCTmGQnwHEYSPUg4/f2UE uk5XR0ybcqN8VWHIK/FHFSWbx2JtP8c= Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549121; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=az01uiRxZtSFbNJFwjD4ZM6qRoCac3SGJkFv8ewEX5o=; b=eTNNX0m1tYtAi5BKKmCwBN2rP24FpQKgSrmuEPgs6l5tTOSqsceo5LrQL2fOTHfRlM7Bu6 3KTILh3e01B2TODpq+H7GMxFBTy5HuDzHFSRQ3VQ7EF1OwJ/uPCTmGQnwHEYSPUg4/f2UE uk5XR0ybcqN8VWHIK/FHFSWbx2JtP8c= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 05/12] kexec: finalize parameter location and size Date: Fri, 21 Mar 2025 10:24:44 +0100 Message-ID: <20250321092451.17309-6-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.80 X-Spamd-Result: default: False [-2.80 / 50.00]; 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This is needed in order to avoid allocating new memory in the area occupied by the new kernel and parameters. Signed-off-by: Juergen Gross --- arch/x86/kexec.c | 15 +++++++++++++++ include/kexec.h | 3 +++ kexec.c | 2 ++ 3 files changed, 20 insertions(+) diff --git a/arch/x86/kexec.c b/arch/x86/kexec.c index 2069f3c6..98a478d3 100644 --- a/arch/x86/kexec.c +++ b/arch/x86/kexec.c @@ -197,4 +197,19 @@ bool kexec_arch_need_analyze_shdrs(void) { return kernel_entry == ~0UL; } + +static unsigned long kexec_param_loc; +static unsigned int kexec_param_size; + +void kexec_set_param_loc(const char *cmdline) +{ + kexec_param_size = sizeof(struct hvm_start_info); + kexec_param_size += e820_entries * sizeof(struct hvm_memmap_table_entry); + kexec_param_size += strlen(cmdline) + 1; + + kexec_last_addr = (kexec_last_addr + 7) & ~7UL; + kexec_param_loc = kexec_last_addr; + kexec_last_addr += kexec_param_size; + kexec_last_addr = round_pgup(kexec_last_addr); +} #endif /* CONFIG_KEXEC */ diff --git a/include/kexec.h b/include/kexec.h index f54cbb90..8a2b552f 100644 --- a/include/kexec.h +++ b/include/kexec.h @@ -42,4 +42,7 @@ int kexec_arch_analyze_phdr(elf_ehdr *ehdr, elf_phdr *phdr); int kexec_arch_analyze_shdr(elf_ehdr *ehdr, elf_shdr *shdr); bool kexec_arch_need_analyze_shdrs(void); +/* Finalize parameter location and size. */ +void kexec_set_param_loc(const char *cmdline); + #endif /* _KEXEC_H */ diff --git a/kexec.c b/kexec.c index 3ff4ea07..7e559994 100644 --- a/kexec.c +++ b/kexec.c @@ -173,6 +173,8 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) if ( ret ) return ret; + kexec_set_param_loc(cmdline); + return ENOSYS; } EXPORT_SYMBOL(kexec); -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:30:46 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:30:46 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923529.1327077 (Exim 4.92) (envelope-from ) id 1tvYiE-0003Ly-3d; Fri, 21 Mar 2025 09:30:46 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923529.1327077; Fri, 21 Mar 2025 09:30:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYiD-0003LM-So; 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dkim=pass header.d=suse.com header.s=susede1 header.b=ucu+XUwa DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549127; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nAlkrmGl4CD2FgQ6p1TiH9XT/Lw2GB/CTlhJ+Z/qIes=; b=ucu+XUwaJKwhDdvrXJ1uGJw2Z7/vvxmQpFIshVqrXsnV/u/CZfeo67OOHOmzUf1NJmFqjX 1ZT7sxHhlAnimSgU6qt8yNML8QR15/piuNAQmO68+bpSWO9InahZWxr9MkELS4yWchdFcS RLkrJcegzN7Hu85iCPqhveVtE+rDaQU= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 06/12] kexec: reserve memory below boundary Date: Fri, 21 Mar 2025 10:24:45 +0100 Message-ID: <20250321092451.17309-7-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 6B06B1FB6B X-Spam-Level: X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; MIME_TRACE(0.00)[0:+]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; TO_DN_SOME(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:email,suse.com:dkim,suse.com:mid,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; DKIM_TRACE(0.00)[suse.com:+] X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action X-Spam-Score: -3.01 X-Spam-Flag: NO In order to support kexec any memory used during copying the new kernel to its final destination must not overlap with the destination area. In order to achieve that add a new interface allowing to mark all allocatable memory below a specific physical address as not available. This is done by walking through all chunks of the buddy allocator and removing the chunks (or chunk parts) below the boundary. The removed chunks are put into a list in order to be able to undo the operation in case kexec is failing before doing any unrecoverable system modifications. Any pages freed located below the boundary need to go directly into the list of reserved pages instead of the free pool. Call the new function from kexec code. Signed-off-by: Juergen Gross --- include/mm.h | 5 +++ kexec.c | 5 +++ mm.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 98 insertions(+), 1 deletion(-) diff --git a/include/mm.h b/include/mm.h index 4fc364ff..5775c3e1 100644 --- a/include/mm.h +++ b/include/mm.h @@ -57,6 +57,11 @@ unsigned long alloc_pages(int order); void free_pages(void *pointer, int order); #define free_page(p) free_pages(p, 0) +#ifdef CONFIG_KEXEC +void reserve_memory_below(unsigned long boundary); +void unreserve_memory_below(void); +#endif + static __inline__ int get_order(unsigned long size) { int order; diff --git a/kexec.c b/kexec.c index 7e559994..68457711 100644 --- a/kexec.c +++ b/kexec.c @@ -175,6 +175,11 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) kexec_set_param_loc(cmdline); + reserve_memory_below(kexec_last_addr); + + /* Error exit. */ + unreserve_memory_below(); + return ENOSYS; } EXPORT_SYMBOL(kexec); diff --git a/mm.c b/mm.c index a5d3f5e5..9236db58 100644 --- a/mm.c +++ b/mm.c @@ -230,6 +230,84 @@ static void init_page_allocator(unsigned long min, unsigned long max) mm_alloc_bitmap_remap(); } +#ifdef CONFIG_KEXEC +static chunk_head_t *reserved_chunks; +static unsigned long boundary_pfn; + +static void free_pages_below(void *pointer, unsigned int order) +{ + unsigned long pfn_s, pfn; + chunk_head_t *ch = pointer; + + pfn_s = virt_to_pfn(ch); + + if ( pfn_s + (1UL << order) <= boundary_pfn ) + { + /* Put complete chunk into reserved list. */ + ch->level = order; + ch->next = reserved_chunks; + reserved_chunks = ch; + } + else + { + /* Put pages below boundary into reserved list. */ + for ( pfn = pfn_s; pfn < boundary_pfn; pfn++ ) + { + chunk_head_t *ch_res = pfn_to_virt(pfn); + + ch_res->level = 0; + ch_res->next = reserved_chunks; + reserved_chunks = ch_res; + } + + /* Return pages above boundary to free pool again. */ + for ( ; pfn < pfn_s + (1UL << order); pfn++ ) + free_pages(pfn_to_virt(pfn), 0); + } +} + +void reserve_memory_below(unsigned long boundary) +{ + unsigned long pfn; + unsigned int order; + chunk_head_t *ch; + + ASSERT(!boundary_pfn); + boundary_pfn = PHYS_PFN(boundary); + + for ( order = 0; order < FREELIST_SIZE; order++ ) + { + for ( ch = free_list[order].next; !FREELIST_EMPTY(ch); ch = ch->next ) + { + pfn = virt_to_pfn(ch); + if ( pfn >= boundary_pfn ) + continue; + + /* Dequeue from this level, at least parts will be reserved. */ + dequeue_elem(ch); + /* Mark all as allocated, pieces above boundary will be returned. */ + map_alloc(pfn, 1UL << ch->level); + + free_pages_below(ch, ch->level); + } + } +} + +void unreserve_memory_below(void) +{ + chunk_head_t *ch; + + boundary_pfn = 0; + + while ( reserved_chunks ) + { + ch = reserved_chunks; + reserved_chunks = ch->next; + free_pages(ch, ch->level); + } +} +#endif /* CONFIG_KEXEC */ + /* Allocate 2^@order contiguous pages. Returns a VIRTUAL address. */ unsigned long alloc_pages(int order) { @@ -279,10 +357,19 @@ EXPORT_SYMBOL(alloc_pages); void free_pages(void *pointer, int order) { chunk_head_t *freed_ch, *to_merge_ch; + unsigned long pfn = virt_to_pfn(pointer); unsigned long mask; +#ifdef CONFIG_KEXEC + if ( pfn < boundary_pfn ) + { + free_pages_below(pointer, order); + return; + } +#endif + /* First free the chunk */ - map_free(virt_to_pfn(pointer), 1UL << order); + map_free(pfn, 1UL << order); /* Create free chunk */ freed_ch = (chunk_head_t *)pointer; -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:31:12 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:31:12 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923584.1327081 (Exim 4.92) (envelope-from ) id 1tvYie-0004ms-4g; Fri, 21 Mar 2025 09:31:12 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923584.1327081; 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bh=jRl2WQrPM47yD+AI8wwwhvNT+l4iLc6RLY7/18FmBWM=; b=g7ldaqdNgS8V2/ZT0oYPT4jSVMYntY2X/qr2JYWIKjeT7roT8nKxrA2oNV9ir6E5pGIZLU 66flxxbSsyJyQVnvRVUnUqIEAmy2e9IjziIE1ah77FuCrQAz9mp9eoA8AWU85618gIMGcy UcvWtvZTTde+MaQ/GGsBfrFg+DKDB5E= Authentication-Results: smtp-out1.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=g7ldaqdN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549149; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jRl2WQrPM47yD+AI8wwwhvNT+l4iLc6RLY7/18FmBWM=; b=g7ldaqdNgS8V2/ZT0oYPT4jSVMYntY2X/qr2JYWIKjeT7roT8nKxrA2oNV9ir6E5pGIZLU 66flxxbSsyJyQVnvRVUnUqIEAmy2e9IjziIE1ah77FuCrQAz9mp9eoA8AWU85618gIMGcy UcvWtvZTTde+MaQ/GGsBfrFg+DKDB5E= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 10/12] kexec: switch read-only area to be writable again Date: Fri, 21 Mar 2025 10:24:49 +0100 Message-ID: <20250321092451.17309-11-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: CEBA621B2C X-Spam-Level: X-Spamd-Result: default: False [-3.01 / 50.00]; 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Signed-off-by: Juergen Gross --- kexec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kexec.c b/kexec.c index 16a0030a..2992f58f 100644 --- a/kexec.c +++ b/kexec.c @@ -184,6 +184,8 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) goto err; } + change_readonly(false); + ret = kexec_move_used_pages(kexec_last_addr, (unsigned long)kernel, kernel_size); if ( ret ) @@ -193,6 +195,7 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) ret = ENOSYS; err: + change_readonly(true); unreserve_memory_below(); kexec_move_used_pages_undo(); kexec_get_entry_undo(); -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:31:21 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:31:21 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923595.1327094 (Exim 4.92) (envelope-from ) id 1tvYin-0005Dy-Sq; Fri, 21 Mar 2025 09:31:21 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923595.1327094; 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Fri, 21 Mar 2025 09:25:44 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 10EE3139AA; Fri, 21 Mar 2025 09:25:44 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id LdmYApgw3WdQGQAAD6G6ig (envelope-from ); Fri, 21 Mar 2025 09:25:44 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 7714b87f-0636-11f0-9ffa-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549144; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Uw6HD4PFeDL/Du0d7ozu2XDJH6Lx8FoCcaVCEavvgsw=; b=T8bNVE7BC+niMVLplTgoyt2dkyN3fAdaEfAlpfAl/HojQhGS/LVzEO4bKYXydfEvftUhYO 4k8pXP4fHkll6f8mOucqCJx4CP+I2SmVc8Mb8oDSExJHiY/hf9PyS6ZHzuI2rsOM0GeBgj JGIm570vSzUO++jiolhm92AXIio8haM= Authentication-Results: smtp-out1.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549144; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Uw6HD4PFeDL/Du0d7ozu2XDJH6Lx8FoCcaVCEavvgsw=; b=T8bNVE7BC+niMVLplTgoyt2dkyN3fAdaEfAlpfAl/HojQhGS/LVzEO4bKYXydfEvftUhYO 4k8pXP4fHkll6f8mOucqCJx4CP+I2SmVc8Mb8oDSExJHiY/hf9PyS6ZHzuI2rsOM0GeBgj JGIm570vSzUO++jiolhm92AXIio8haM= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 09/12] mm: change set_readonly() to change_readonly() Date: Fri, 21 Mar 2025 10:24:48 +0100 Message-ID: <20250321092451.17309-10-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Level: X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:email,suse.com:mid,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[] X-Spam-Score: -2.80 X-Spam-Flag: NO Rename set_readonly() to change_readonly() and add a parameter specifying whether it should set the kernel to readonly or to writable. At the same time move the boundary setting from the only caller into the function itself, avoiding the need to use the same boundaries in future, when it will be called to set the kernel to writable again. Make the function globally visible in order to allow calling it from kexec coding later. Merge clear_bootstrap() into change_readonly() and undo its setting of page 0 to invalid when setting the kernel writable. Signed-off-by: Juergen Gross --- arch/x86/mm.c | 111 +++++++++++++++++++++++++++----------------------- include/mm.h | 3 ++ 2 files changed, 64 insertions(+), 50 deletions(-) diff --git a/arch/x86/mm.c b/arch/x86/mm.c index a71eb192..f4419d95 100644 --- a/arch/x86/mm.c +++ b/arch/x86/mm.c @@ -405,17 +405,19 @@ static void build_pagetable(unsigned long *start_pfn, unsigned long *max_pfn) */ extern struct shared_info shared_info; -struct set_readonly_par { +struct change_readonly_par { unsigned long etext; #ifdef CONFIG_PARAVIRT unsigned int count; #endif + bool readonly; }; -static int set_readonly_func(unsigned long va, unsigned int lvl, bool is_leaf, - pgentry_t *pte, void *par) +static int change_readonly_func(unsigned long va, unsigned int lvl, + bool is_leaf, pgentry_t *pte, void *par) { - struct set_readonly_par *ro = par; + struct change_readonly_par *ro = par; + pgentry_t newval; if ( !is_leaf ) return 0; @@ -429,9 +431,11 @@ static int set_readonly_func(unsigned long va, unsigned int lvl, bool is_leaf, return 0; } + newval = ro->readonly ? (*pte & ~_PAGE_RW) : (*pte | _PAGE_RW); + #ifdef CONFIG_PARAVIRT mmu_updates[ro->count].ptr = virt_to_mach(pte); - mmu_updates[ro->count].val = *pte & ~_PAGE_RW; + mmu_updates[ro->count].val = newval; ro->count++; if ( ro->count == L1_PAGETABLE_ENTRIES ) @@ -442,7 +446,7 @@ static int set_readonly_func(unsigned long va, unsigned int lvl, bool is_leaf, ro->count = 0; } #else - *pte &= ~_PAGE_RW; + *pte = newval; #endif return 0; @@ -463,23 +467,6 @@ static void tlb_flush(void) } #endif -static void set_readonly(void *text, void *etext) -{ - struct set_readonly_par setro = { .etext = (unsigned long)etext }; - unsigned long start_address = PAGE_ALIGN((unsigned long)text); - - printk("setting %p-%p readonly\n", text, etext); - walk_pt(start_address, setro.etext, set_readonly_func, &setro); - -#ifdef CONFIG_PARAVIRT - if ( setro.count && - HYPERVISOR_mmu_update(mmu_updates, setro.count, NULL, DOMID_SELF) < 0) - BUG(); -#endif - - tlb_flush(); -} - /* * get the PTE for virtual address va if it exists. Otherwise NULL. */ @@ -508,6 +495,51 @@ static pgentry_t *get_pgt(unsigned long va) return tab; } +void change_readonly(bool readonly) +{ + struct change_readonly_par ro = { + .etext = (unsigned long)&_erodata, + .readonly = readonly, + }; + unsigned long start_address = PAGE_ALIGN((unsigned long)&_text); +#ifdef CONFIG_PARAVIRT + pte_t nullpte = { }; + int rc; +#else + pgentry_t *pgt = get_pgt((unsigned long)&_text); +#endif + + if ( readonly ) + { +#ifdef CONFIG_PARAVIRT + if ( (rc = HYPERVISOR_update_va_mapping(0, nullpte, UVMF_INVLPG)) ) + printk("Unable to unmap NULL page. rc=%d\n", rc); +#else + *pgt = 0; + invlpg((unsigned long)&_text); +#endif + } + else + { +#ifdef CONFIG_PARAVIRT + /* No kexec support with PARAVIRT. */ + BUG(); +#else + *pgt = L1_PROT; +#endif + } + + printk("setting %p-%p readonly\n", &_text, &_erodata); + walk_pt(start_address, ro.etext, change_readonly_func, &ro); + +#ifdef CONFIG_PARAVIRT + if ( ro.count && + HYPERVISOR_mmu_update(mmu_updates, ro.count, NULL, DOMID_SELF) < 0) + BUG(); +#endif + + tlb_flush(); +} /* * return a valid PTE for a given virtual address. If PTE does not exist, @@ -789,31 +821,6 @@ int unmap_frames(unsigned long va, unsigned long num_frames) } EXPORT_SYMBOL(unmap_frames); -/* - * Clear some of the bootstrap memory - */ -static void clear_bootstrap(void) -{ -#ifdef CONFIG_PARAVIRT - pte_t nullpte = { }; - int rc; -#else - pgentry_t *pgt; -#endif - - /* Use first page as the CoW zero page */ - memset(&_text, 0, PAGE_SIZE); - mfn_zero = virt_to_mfn((unsigned long) &_text); -#ifdef CONFIG_PARAVIRT - if ( (rc = HYPERVISOR_update_va_mapping(0, nullpte, UVMF_INVLPG)) ) - printk("Unable to unmap NULL page. rc=%d\n", rc); -#else - pgt = get_pgt((unsigned long)&_text); - *pgt = 0; - invlpg((unsigned long)&_text); -#endif -} - #ifdef CONFIG_PARAVIRT void p2m_chk_pfn(unsigned long pfn) { @@ -884,8 +891,12 @@ void arch_init_mm(unsigned long* start_pfn_p, unsigned long* max_pfn_p) printk(" max_pfn: %lx\n", max_pfn); build_pagetable(&start_pfn, &max_pfn); - clear_bootstrap(); - set_readonly(&_text, &_erodata); + + /* Prepare page 0 as CoW page. */ + memset(&_text, 0, PAGE_SIZE); + mfn_zero = virt_to_mfn((unsigned long)&_text); + + change_readonly(true); *start_pfn_p = start_pfn; *max_pfn_p = max_pfn; diff --git a/include/mm.h b/include/mm.h index 5775c3e1..0a16d56c 100644 --- a/include/mm.h +++ b/include/mm.h @@ -25,6 +25,7 @@ #ifndef _MM_H_ #define _MM_H_ +#include #if defined(__i386__) #include #elif defined(__x86_64__) @@ -92,4 +93,6 @@ extern unsigned long heap, brk, heap_mapped, heap_end; int free_physical_pages(xen_pfn_t *mfns, int n); void fini_mm(void); +void change_readonly(bool readonly); + #endif /* _MM_H_ */ -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:31:26 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:31:26 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923599.1327108 (Exim 4.92) (envelope-from ) id 1tvYis-0005hr-SF; Fri, 21 Mar 2025 09:31:26 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923599.1327108; 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bh=HQe3NFl9NcYNQIAbCkFgkSlVK4W9Vi1C+SAHqrE0njI=; b=rVMNk08qj8xr248VPAaqoUDnb3UN031wvyAVRy62mdY6oL37SgxFKyxcUmYmDAY9GZkwL4 UfoosWMhcQN4IeM7ERad686Tg8/QjFpJTEIEHZbD2XgI+4IMeh644EX5ilgUe7+1H6Ch/W YHJDLawq5zEnu3VCyqOLBcMApjkbyN0= Authentication-Results: smtp-out1.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=rVMNk08q DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549155; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HQe3NFl9NcYNQIAbCkFgkSlVK4W9Vi1C+SAHqrE0njI=; b=rVMNk08qj8xr248VPAaqoUDnb3UN031wvyAVRy62mdY6oL37SgxFKyxcUmYmDAY9GZkwL4 UfoosWMhcQN4IeM7ERad686Tg8/QjFpJTEIEHZbD2XgI+4IMeh644EX5ilgUe7+1H6Ch/W YHJDLawq5zEnu3VCyqOLBcMApjkbyN0= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 11/12] kexec: add kexec callback functionality Date: Fri, 21 Mar 2025 10:24:50 +0100 Message-ID: <20250321092451.17309-12-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 6464821D73 X-Spam-Score: -3.01 X-Rspamd-Action: no action X-Spamd-Result: default: False [-3.01 / 50.00]; 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The called functions will be called with a boolean parameter "undo" indicating whether a previous call needs to be undone due to a failure during kexec(). The related loop to call all callbacks is added to kexec(). Signed-off-by: Juergen Gross --- arch/x86/minios-x86.lds.S | 8 ++++++++ arch/x86/mm.c | 3 ++- include/kexec.h | 6 ++++++ kexec.c | 13 +++++++++++++ 4 files changed, 29 insertions(+), 1 deletion(-) diff --git a/arch/x86/minios-x86.lds.S b/arch/x86/minios-x86.lds.S index 83ec41ce..35356b34 100644 --- a/arch/x86/minios-x86.lds.S +++ b/arch/x86/minios-x86.lds.S @@ -58,6 +58,14 @@ SECTIONS } PROVIDE (__fini_array_end = .); +#if defined(CONFIG_KEXEC) + PROVIDE (__kexec_array_start = .); + .kexec_array : { + *(.kexec_array) + } + PROVIDE (__kexec_array_end = .); +#endif + .ctors : { __CTOR_LIST__ = .; *(.ctors) diff --git a/arch/x86/mm.c b/arch/x86/mm.c index f4419d95..26ede6f4 100644 --- a/arch/x86/mm.c +++ b/arch/x86/mm.c @@ -529,7 +529,8 @@ void change_readonly(bool readonly) #endif } - printk("setting %p-%p readonly\n", &_text, &_erodata); + printk("setting %p-%p %s\n", &_text, &_erodata, + readonly ? "readonly" : "writable"); walk_pt(start_address, ro.etext, change_readonly_func, &ro); #ifdef CONFIG_PARAVIRT diff --git a/include/kexec.h b/include/kexec.h index 411fa013..b89c3000 100644 --- a/include/kexec.h +++ b/include/kexec.h @@ -18,6 +18,12 @@ struct kexec_action { extern char _kexec_start[], _kexec_end[]; extern struct kexec_action kexec_actions[KEXEC_MAX_ACTIONS]; +extern unsigned long __kexec_array_start[], __kexec_array_end[]; + +typedef int(*kexeccall_t)(bool undo); +#define kexec_call(func) \ + static kexeccall_t __kexeccall_##func __attribute__((__used__)) \ + __attribute__((__section__(".kexec_array"))) = func extern unsigned long kexec_last_addr; diff --git a/kexec.c b/kexec.c index 2992f58f..2db876e8 100644 --- a/kexec.c +++ b/kexec.c @@ -168,6 +168,7 @@ static int analyze_kernel(void *kernel, unsigned long size) int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) { int ret; + unsigned long *func; ret = analyze_kernel(kernel, kernel_size); if ( ret ) @@ -191,6 +192,18 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) if ( ret ) goto err; + for ( func = __kexec_array_start; func < __kexec_array_end; func++ ) + { + ret = ((kexeccall_t)(*func))(false); + if ( ret ) + { + for ( func--; func >= __kexec_array_start; func-- ) + ((kexeccall_t)(*func))(true); + + goto err; + } + } + /* Error exit. */ ret = ENOSYS; -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:31:42 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:31:42 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923621.1327123 (Exim 4.92) (envelope-from ) id 1tvYj8-0006r7-6Y; Fri, 21 Mar 2025 09:31:42 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923621.1327123; Fri, 21 Mar 2025 09:31:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYj8-0006qx-39; Fri, 21 Mar 2025 09:31:42 +0000 Received: by outflank-mailman (input) for mailman id 923621; 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Fri, 21 Mar 2025 09:25:38 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id zVw7GpIw3WdHGQAAD6G6ig (envelope-from ); Fri, 21 Mar 2025 09:25:38 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 73ca5274-0636-11f0-9ffa-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549138; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Tll1MlN0K/PdIjHkU/c7azaHqaqB0dNTwcC3GeOaxx4=; b=jN/VqmWmxiDz7s9auX1iDheqDw71OvKlPxSIjsEk3qYOnK2cqbNGFEcpve6sIJ38kFLLZo ilvnyToRz2LBVsIQplXIAEuZ948/4JCKRkoMYp/2WGJWZWTUBxqForZYUwROq6ZSCKcqxO LPlm1TD1hnyDYppdLkkVL/2uLX9W014= Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549138; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Tll1MlN0K/PdIjHkU/c7azaHqaqB0dNTwcC3GeOaxx4=; b=jN/VqmWmxiDz7s9auX1iDheqDw71OvKlPxSIjsEk3qYOnK2cqbNGFEcpve6sIJ38kFLLZo ilvnyToRz2LBVsIQplXIAEuZ948/4JCKRkoMYp/2WGJWZWTUBxqForZYUwROq6ZSCKcqxO LPlm1TD1hnyDYppdLkkVL/2uLX9W014= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 08/12] kexec: move used pages away for new kernel Date: Fri, 21 Mar 2025 10:24:47 +0100 Message-ID: <20250321092451.17309-9-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321092451.17309-1-jgross@suse.com> References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.80 X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:mid,suse.com:email,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO X-Spam-Level: Copying the new kexec kernel must not overwrite any pages still needed during this process. Those are especially the GDT, IDT and page tables. Move those to new allocated pages and update any related pointers. In case the kexec process is cancelled later, don't undo any page table moves, as the system can just be used with the new layout. By freeing the original pages there is no memory leaking. GDT and IDT should be reverted to their original locations, as their original memory can't be freed due to not being whole pages. Signed-off-by: Juergen Gross --- arch/x86/mm.c | 126 ++++++++++++++++++++++++++++++++++++++++++++++++ include/kexec.h | 5 ++ kexec.c | 6 +++ 3 files changed, 137 insertions(+) diff --git a/arch/x86/mm.c b/arch/x86/mm.c index 3ba6d917..a71eb192 100644 --- a/arch/x86/mm.c +++ b/arch/x86/mm.c @@ -42,6 +42,7 @@ #include #include #include +#include #include #include #include @@ -923,3 +924,128 @@ unsigned long map_frame_virt(unsigned long mfn) return addr; } EXPORT_SYMBOL(map_frame_virt); + +#ifdef CONFIG_KEXEC +static unsigned long kexec_gdt; +static unsigned long kexec_idt; + +static int move_pt(unsigned long va, unsigned int lvl, bool is_leaf, + pgentry_t *pte, void *par) +{ + unsigned long boundary_pfn = *(unsigned long *)par; + unsigned long pfn; + void *old_pg, *new_pg; + + if ( is_leaf ) + return 0; + + pfn = (lvl == PAGETABLE_LEVELS + 1) ? PHYS_PFN(*(unsigned long *)pte) + : pte_to_mfn(*pte); + if ( pfn >= boundary_pfn ) + return 0; + + new_pg = (void *)alloc_page(); + if ( !new_pg ) + return ENOMEM; + old_pg = pfn_to_virt(pfn); + memcpy(new_pg, old_pg, PAGE_SIZE); + if ( lvl == PAGETABLE_LEVELS + 1 ) + *(pgentry_t **)pte = new_pg; + else + *pte = ((unsigned long)new_pg & PAGE_MASK) | ptdata[lvl].prot; + + tlb_flush(); + + free_page(old_pg); + + return 0; +} + +static int move_leaf(unsigned long va, unsigned int lvl, bool is_leaf, + pgentry_t *pte, void *par) +{ + unsigned long boundary_pfn = *(unsigned long *)par; + unsigned long pfn; + void *old_pg, *new_pg; + + if ( !is_leaf ) + return 0; + + /* No large page support, all pages must be valid. */ + if ( (*pte & _PAGE_PSE) || !(*pte & _PAGE_PRESENT) ) + return EINVAL; + + pfn = pte_to_mfn(*pte); + if ( pfn >= boundary_pfn ) + return 0; + + new_pg = (void *)alloc_page(); + if ( !new_pg ) + return ENOMEM; + old_pg = pfn_to_virt(pfn); + memcpy(new_pg, old_pg, PAGE_SIZE); + *pte = ((unsigned long)new_pg & PAGE_MASK) | ptdata[lvl].prot; + + invlpg(va); + + free_page(old_pg); + + return 0; +} + +int kexec_move_used_pages(unsigned long boundary, unsigned long kernel, + unsigned long kernel_size) +{ + int ret; + unsigned long boundary_pfn = PHYS_PFN(boundary); + + kexec_gdt = alloc_page(); + if ( !kexec_gdt ) + return ENOMEM; + memcpy((char *)kexec_gdt, &gdt, sizeof(gdt)); + gdt_ptr.base = kexec_gdt; + asm volatile("lgdt %0" : : "m" (gdt_ptr)); + + kexec_idt = alloc_page(); + if ( !kexec_idt ) + return ENOMEM; + memcpy((char *)kexec_idt, &idt, sizeof(idt)); + idt_ptr.base = kexec_idt; + asm volatile("lidt %0" : : "m" (idt_ptr)); + + /* Top level page table needs special handling. */ + ret = move_pt(0, PAGETABLE_LEVELS + 1, false, (pgentry_t *)(&pt_base), + &boundary_pfn); + if ( ret ) + return ret; + ret = walk_pt(0, ~0UL, move_pt, &boundary_pfn); + if ( ret ) + return ret; + + /* Move new kernel image pages. */ + ret = walk_pt(kernel, kernel + kernel_size - 1, move_leaf, &boundary_pfn); + if ( ret ) + return ret; + + return 0; +} + +void kexec_move_used_pages_undo(void) +{ + if ( kexec_gdt ) + { + gdt_ptr.base = (unsigned long)&gdt; + asm volatile("lgdt %0" : : "m" (gdt_ptr)); + free_page((void *)kexec_gdt); + kexec_gdt = 0; + } + + if ( kexec_idt ) + { + idt_ptr.base = (unsigned long)&idt; + asm volatile("lidt %0" : : "m" (idt_ptr)); + free_page((void *)kexec_idt); + kexec_idt = 0; + } +} +#endif diff --git a/include/kexec.h b/include/kexec.h index 7b103dea..411fa013 100644 --- a/include/kexec.h +++ b/include/kexec.h @@ -49,4 +49,9 @@ void kexec_set_param_loc(const char *cmdline); int kexec_get_entry(const char *cmdline); void kexec_get_entry_undo(void); +/* Move used pages away from new kernel area. */ +int kexec_move_used_pages(unsigned long boundary, unsigned long kernel, + unsigned long kernel_size); +void kexec_move_used_pages_undo(void); + #endif /* _KEXEC_H */ diff --git a/kexec.c b/kexec.c index 0ef8eb35..16a0030a 100644 --- a/kexec.c +++ b/kexec.c @@ -184,11 +184,17 @@ int kexec(void *kernel, unsigned long kernel_size, const char *cmdline) goto err; } + ret = kexec_move_used_pages(kexec_last_addr, (unsigned long)kernel, + kernel_size); + if ( ret ) + goto err; + /* Error exit. */ ret = ENOSYS; err: unreserve_memory_below(); + kexec_move_used_pages_undo(); kexec_get_entry_undo(); return ret; -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:40:37 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:40:37 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923664.1327137 (Exim 4.92) (envelope-from ) id 1tvYrj-0000lX-3v; Fri, 21 Mar 2025 09:40:35 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923664.1327137; Fri, 21 Mar 2025 09:40:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYrj-0000lP-0F; Fri, 21 Mar 2025 09:40:35 +0000 Received: by outflank-mailman (input) for mailman id 923664; 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none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549514; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=w41cQJdYbcNGHG3cF8bDLMo1yZi7in/akXd7iDnt7OY=; b=BovOjo2YehkiVA2nJhh3+0LzxX51+jeHs44jv7sSuOuo1ch7kOdYpouLds5CA7wssg3IbD UEjuIbBRwX5ajG/4OUMUBLXbe6pvdbwMqzFwgiYMkd6VZ9qcqPA/cDZ8XxkErXVFf4UdDX ra4yX7rhwg7wqPx+LWH1d5wj4w1W7PM= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross , Jason Andryuk Subject: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook Date: Fri, 21 Mar 2025 10:31:44 +0100 Message-ID: <20250321093145.17882-2-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321093145.17882-1-jgross@suse.com> References: <20250321093145.17882-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: -6.80 X-Spamd-Result: default: False [-6.80 / 50.00]; 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Signed-off-by: Juergen Gross Reviewed-by: Jason Andryuk --- V2: - or file access mode into st_mode (Jason Andryuk) --- 9pfront.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/9pfront.c b/9pfront.c index 1741d600..7257a07e 100644 --- a/9pfront.c +++ b/9pfront.c @@ -85,6 +85,8 @@ struct file_9pfs { #define P9_QID_SIZE 13 +#define QID_TYPE_DIR 0x80 /* Applies to qid[0]. */ + struct p9_header { uint32_t size; uint8_t cmd; @@ -950,6 +952,32 @@ static int write_9pfs(struct file *file, const void *buf, size_t nbytes) return ret; } +static int fstat_9pfs(struct file *file, struct stat *buf) +{ + struct file_9pfs *f9pfs = file->filedata; + struct p9_stat stat; + int ret; + + ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); + if ( ret ) + { + errno = EIO; + return -1; + } + + buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; + buf->st_mode |= stat.mode & 0777; + buf->st_atime = stat.atime; + buf->st_mtime = stat.mtime; + buf->st_size = stat.length; + buf->st_uid = stat.n_uid; + buf->st_gid = stat.n_gid; + + free_stat(&stat); + + return 0; +} + static int close_9pfs(struct file *file) { struct file_9pfs *f9pfs = file->filedata; @@ -1296,6 +1324,7 @@ static const struct file_ops ops_9pfs = { .read = read_9pfs, .write = write_9pfs, .close = close_9pfs, + .fstat = fstat_9pfs, }; __attribute__((constructor)) -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:40:44 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:40:44 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923671.1327140 (Exim 4.92) (envelope-from ) id 1tvYrs-0000uE-4b; Fri, 21 Mar 2025 09:40:44 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923671.1327140; 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bh=4BpHAguWxlsmt8Ud6JDitYmvVQmBcsNG/Ch0rgSbdso=; b=OqPlJU8F4c0C330u9Hsn9Yvosf8dzfLHgTLimxmL++mnNla64dNaz46hrNkc0DeKc2SRh2 3tcb7m3eC2sX0+9gHkxED3FrX/S+upqcRQbCT+imI9FuTM4yEFhAf0hqlXNKUD8rF2z3kx q+GXRx0UFrHaawge42lz8IipdG/E6iA= Authentication-Results: smtp-out1.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549519; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4BpHAguWxlsmt8Ud6JDitYmvVQmBcsNG/Ch0rgSbdso=; b=OqPlJU8F4c0C330u9Hsn9Yvosf8dzfLHgTLimxmL++mnNla64dNaz46hrNkc0DeKc2SRh2 3tcb7m3eC2sX0+9gHkxED3FrX/S+upqcRQbCT+imI9FuTM4yEFhAf0hqlXNKUD8rF2z3kx q+GXRx0UFrHaawge42lz8IipdG/E6iA= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross , Jason Andryuk Subject: [MINI-OS PATCH v2 2/2] 9pfs: add lseek file operation hook Date: Fri, 21 Mar 2025 10:31:45 +0100 Message-ID: <20250321093145.17882-3-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250321093145.17882-1-jgross@suse.com> References: <20250321093145.17882-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: -6.80 X-Spamd-Result: default: False [-6.80 / 50.00]; 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Just use the lseek_default() implementation. Signed-off-by: Juergen Gross Reviewed-by: Jason Andryuk --- 9pfront.c | 1 + 1 file changed, 1 insertion(+) diff --git a/9pfront.c b/9pfront.c index 7257a07e..8bf3a91e 100644 --- a/9pfront.c +++ b/9pfront.c @@ -1325,6 +1325,7 @@ static const struct file_ops ops_9pfs = { .write = write_9pfs, .close = close_9pfs, .fstat = fstat_9pfs, + .lseek = lseek_default, }; __attribute__((constructor)) -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 09:41:39 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 09:41:39 +0000 Received: from list by lists.xenproject.org with outflank-mailman.923734.1327164 (Exim 4.92) (envelope-from ) id 1tvYsl-0003Fu-Me; Fri, 21 Mar 2025 09:41:39 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 923734.1327164; Fri, 21 Mar 2025 09:41:39 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYsl-0003Fq-K4; Fri, 21 Mar 2025 09:41:39 +0000 Received: by outflank-mailman (input) for mailman id 923734; Fri, 21 Mar 2025 09:41:38 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvYjH-000356-43 for minios-devel@lists.xenproject.org; Fri, 21 Mar 2025 09:31:51 +0000 Received: from smtp-out1.suse.de (smtp-out1.suse.de [2a07:de40:b251:101:10:150:64:1]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 50b180e2-0637-11f0-9ffa-bf95429c2676; Fri, 21 Mar 2025 10:31:49 +0100 (CET) Received: from imap1.dmz-prg2.suse.org (unknown [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id A41C721D84; Fri, 21 Mar 2025 09:31:48 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 61F6C139AA; Fri, 21 Mar 2025 09:31:48 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id ej9tFgQy3WdUGwAAD6G6ig (envelope-from ); Fri, 21 Mar 2025 09:31:48 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 50b180e2-0637-11f0-9ffa-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549508; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=rI2ieuGEA6udzp8fMeYy10hSLLdHyPPXbjrCTmqils8=; b=YtFzqt/iQ7fECJZMX4n5dQLvSCjaMyKihRjazv1Jg642rAru2yf+OwAHv0TqOOYHO9rK1e +FswF0SmeVEdu0EqUrQrIA67dALheZOBnPO2I5PiCklIKCzH1BsRIW4G2nBNMQu9bwoJ0P X8AY9S6u10QZSTU9Bgc2dErnZBEgxK0= Authentication-Results: smtp-out1.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742549508; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=rI2ieuGEA6udzp8fMeYy10hSLLdHyPPXbjrCTmqils8=; b=YtFzqt/iQ7fECJZMX4n5dQLvSCjaMyKihRjazv1Jg642rAru2yf+OwAHv0TqOOYHO9rK1e +FswF0SmeVEdu0EqUrQrIA67dALheZOBnPO2I5PiCklIKCzH1BsRIW4G2nBNMQu9bwoJ0P X8AY9S6u10QZSTU9Bgc2dErnZBEgxK0= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH v2 0/2] 9pfs: add some file operation hooks Date: Fri, 21 Mar 2025 10:31:43 +0100 Message-ID: <20250321093145.17882-1-jgross@suse.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Level: X-Spamd-Result: default: False [-2.77 / 50.00]; BAYES_HAM(-2.97)[99.88%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; FUZZY_BLOCKED(0.00)[rspamd.com]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.com:mid] X-Spam-Score: -2.77 X-Spam-Flag: NO For being able to store the Xenstore state in preparation of a live update operation, 9pfront is needing support for fstat and lseek. Changes in V2: - addressed comment for patch 1 Juergen Gross (2): 9pfs: add fstat file operation hook 9pfs: add lseek file operation hook 9pfront.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Fri Mar 21 13:52:02 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 13:52:02 +0000 Received: from list by lists.xenproject.org with outflank-mailman.924019.1327379 (Exim 4.92) (envelope-from ) id 1tvcn3-0007Lx-Hs; Fri, 21 Mar 2025 13:52:01 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 924019.1327379; Fri, 21 Mar 2025 13:52:01 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvcn3-0007Ln-Ec; Fri, 21 Mar 2025 13:52:01 +0000 Received: by outflank-mailman (input) for mailman id 924019; Fri, 21 Mar 2025 13:51:59 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvcn1-00077a-5v for minios-devel@lists.xenproject.org; Fri, 21 Mar 2025 13:51:59 +0000 Received: from mail-wm1-x32e.google.com (mail-wm1-x32e.google.com [2a00:1450:4864:20::32e]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id a76318f2-065b-11f0-9ea1-5ba50f476ded; Fri, 21 Mar 2025 14:51:57 +0100 (CET) Received: by mail-wm1-x32e.google.com with SMTP id 5b1f17b1804b1-4394036c0efso11840705e9.2 for ; Fri, 21 Mar 2025 06:51:57 -0700 (PDT) Received: from [10.156.60.236] (ip-037-024-206-209.um08.pools.vodafone-ip.de. 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Fri, 21 Mar 2025 06:51:56 -0700 (PDT) Message-ID: Date: Fri, 21 Mar 2025 14:51:54 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH 03/12] add elf.h To: Juergen Gross Cc: samuel.thibault@ens-lyon.org, minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org References: <20250321092451.17309-1-jgross@suse.com> <20250321092451.17309-4-jgross@suse.com> Content-Language: en-US From: Jan Beulich Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: <20250321092451.17309-4-jgross@suse.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 21.03.2025 10:24, Juergen Gross wrote: > Add some definitions for accessing an ELF file. Only the file header > and the program header are needed. > > The main source for those are elfstructs.h and libelf.h from the Xen > tree. The license boiler plate of those files is being kept in the > resulting header file. Maybe the copying was a bit too literal. > --- /dev/null > +++ b/include/elf.h > @@ -0,0 +1,340 @@ > +#ifndef __ELF_H__ > +#define __ELF_H__ > +/* > + * Copyright (c) 1995, 1996 Erik Theisen. All rights reserved. > + * > + * Redistribution and use in source and binary forms, with or without > + * modification, are permitted provided that the following conditions > + * are met: > + * 1. Redistributions of source code must retain the above copyright > + * notice, this list of conditions and the following disclaimer. > + * 2. Redistributions in binary form must reproduce the above copyright > + * notice, this list of conditions and the following disclaimer in the > + * documentation and/or other materials provided with the distribution. > + * 3. The name of the author may not be used to endorse or promote products > + * derived from this software without specific prior written permission > + * > + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR > + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES > + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. > + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, > + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT > + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, > + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY > + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT > + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF > + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. > + */ > + > +#include > +#include > + > +typedef uint32_t Elf32_Addr; /* Unsigned program address */ > +typedef uint32_t Elf32_Off; /* Unsigned file offset */ > +typedef uint16_t Elf32_Half; /* Unsigned medium integer */ > +typedef uint32_t Elf32_Word; /* Unsigned large integer */ > + > +typedef uint64_t Elf64_Addr; > +typedef uint64_t Elf64_Off; > +typedef uint16_t Elf64_Half; > +typedef uint32_t Elf64_Word; > +typedef uint64_t Elf64_Xword; > + > +/* Unique build id string format when using --build-id. */ > +#define NT_GNU_BUILD_ID 3 > + > +/* > + * e_ident[] identification indexes > + * See http://www.caldera.com/developers/gabi/2000-07-17/ch4.eheader.html > + */ > +#define EI_MAG0 0 /* file ID */ > +#define EI_MAG1 1 /* file ID */ > +#define EI_MAG2 2 /* file ID */ > +#define EI_MAG3 3 /* file ID */ > +#define EI_CLASS 4 /* file class */ > +#define EI_DATA 5 /* data encoding */ > +#define EI_VERSION 6 /* ELF header version */ > +#define EI_OSABI 7 /* OS/ABI ID */ > +#define EI_ABIVERSION 8 /* ABI version */ > +#define EI_PAD 9 /* start of pad bytes */ > +#define EI_NIDENT 16 /* Size of e_ident[] */ > + > +/* e_ident[] magic number */ > +#define ELFMAG0 0x7f /* e_ident[EI_MAG0] */ > +#define ELFMAG1 'E' /* e_ident[EI_MAG1] */ > +#define ELFMAG2 'L' /* e_ident[EI_MAG2] */ > +#define ELFMAG3 'F' /* e_ident[EI_MAG3] */ > +#define ELFMAG "\177ELF" /* magic */ > +#define SELFMAG 4 /* size of magic */ > + > +/* e_ident[] file class */ > +#define ELFCLASSNONE 0 /* invalid */ > +#define ELFCLASS32 1 /* 32-bit objs */ > +#define ELFCLASS64 2 /* 64-bit objs */ > +#define ELFCLASSNUM 3 /* number of classes */ > + > +/* e_ident[] data encoding */ > +#define ELFDATANONE 0 /* invalid */ > +#define ELFDATA2LSB 1 /* Little-Endian */ > +#define ELFDATA2MSB 2 /* Big-Endian */ > +#define ELFDATANUM 3 /* number of data encode defines */ > + > +/* e_ident[] Operating System/ABI */ > +#define ELFOSABI_SYSV 0 /* UNIX System V ABI */ > +#define ELFOSABI_NONE 0 /* Same as ELFOSABI_SYSV */ > +#define ELFOSABI_HPUX 1 /* HP-UX operating system */ > +#define ELFOSABI_NETBSD 2 /* NetBSD */ > +#define ELFOSABI_LINUX 3 /* GNU/Linux */ > +#define ELFOSABI_HURD 4 /* GNU/Hurd */ > +#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */ > +#define ELFOSABI_SOLARIS 6 /* Solaris */ > +#define ELFOSABI_MONTEREY 7 /* Monterey */ > +#define ELFOSABI_IRIX 8 /* IRIX */ > +#define ELFOSABI_FREEBSD 9 /* FreeBSD */ > +#define ELFOSABI_TRU64 10 /* TRU64 UNIX */ > +#define ELFOSABI_MODESTO 11 /* Novell Modesto */ > +#define ELFOSABI_OPENBSD 12 /* OpenBSD */ > +#define ELFOSABI_ARM 97 /* ARM */ > +#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */ While I'm happy to see Modesto mentioned in yet another places, I don't think you need the majority of these? > +/* e_ident */ > +#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ > + (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ > + (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ > + (ehdr).e_ident[EI_MAG3] == ELFMAG3) > + > +/* e_flags */ > +#define EF_ARM_EABI_MASK 0xff000000 > +#define EF_ARM_EABI_UNKNOWN 0x00000000 > +#define EF_ARM_EABI_VER1 0x01000000 > +#define EF_ARM_EABI_VER2 0x02000000 > +#define EF_ARM_EABI_VER3 0x03000000 > +#define EF_ARM_EABI_VER4 0x04000000 > +#define EF_ARM_EABI_VER5 0x05000000 > + > +/* ELF Header */ > +typedef struct { > + unsigned char e_ident[EI_NIDENT]; /* ELF Identification */ > + Elf32_Half e_type; /* object file type */ > + Elf32_Half e_machine; /* machine */ > + Elf32_Word e_version; /* object file version */ > + Elf32_Addr e_entry; /* virtual entry point */ > + Elf32_Off e_phoff; /* program header table offset */ > + Elf32_Off e_shoff; /* section header table offset */ > + Elf32_Word e_flags; /* processor-specific flags */ > + Elf32_Half e_ehsize; /* ELF header size */ > + Elf32_Half e_phentsize; /* program header entry size */ > + Elf32_Half e_phnum; /* number of program header entries */ > + Elf32_Half e_shentsize; /* section header entry size */ > + Elf32_Half e_shnum; /* number of section header entries */ > + Elf32_Half e_shstrndx; /* section header table's "section > + header string table" entry offset */ > +} Elf32_Ehdr; > + > +typedef struct { > + unsigned char e_ident[EI_NIDENT]; /* Id bytes */ > + Elf64_Half e_type; /* file type */ > + Elf64_Half e_machine; /* machine type */ > + Elf64_Word e_version; /* version number */ > + Elf64_Addr e_entry; /* entry point */ > + Elf64_Off e_phoff; /* Program hdr offset */ > + Elf64_Off e_shoff; /* Section hdr offset */ > + Elf64_Word e_flags; /* Processor flags */ > + Elf64_Half e_ehsize; /* sizeof ehdr */ > + Elf64_Half e_phentsize; /* Program header entry size */ > + Elf64_Half e_phnum; /* Number of program headers */ > + Elf64_Half e_shentsize; /* Section header entry size */ > + Elf64_Half e_shnum; /* Number of section headers */ > + Elf64_Half e_shstrndx; /* String table index */ > +} Elf64_Ehdr; > + > +/* e_type */ > +#define ET_NONE 0 /* No file type */ > +#define ET_REL 1 /* relocatable file */ > +#define ET_EXEC 2 /* executable file */ > +#define ET_DYN 3 /* shared object file */ > +#define ET_CORE 4 /* core file */ > +#define ET_NUM 5 /* number of types */ > +#define ET_LOPROC 0xff00 /* reserved range for processor */ > +#define ET_HIPROC 0xffff /* specific e_type */ > + > +/* e_machine */ > +#define EM_NONE 0 /* No Machine */ > +#define EM_M32 1 /* AT&T WE 32100 */ > +#define EM_SPARC 2 /* SPARC */ > +#define EM_386 3 /* Intel 80386 */ > +#define EM_68K 4 /* Motorola 68000 */ > +#define EM_88K 5 /* Motorola 88000 */ > +#define EM_486 6 /* Intel 80486 - unused? */ > +#define EM_860 7 /* Intel 80860 */ > +#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ > +/* > + * Don't know if EM_MIPS_RS4_BE, > + * EM_SPARC64, EM_PARISC, > + * or EM_PPC are ABI compliant > + */ > +#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ > +#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */ > +#define EM_PARISC 15 /* HPPA */ > +#define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */ > +#define EM_PPC 20 /* PowerPC */ > +#define EM_PPC64 21 /* PowerPC 64-bit */ > +#define EM_ARM 40 /* Advanced RISC Machines ARM */ > +#define EM_ALPHA 41 /* DEC ALPHA */ > +#define EM_SPARCV9 43 /* SPARC version 9 */ > +#define EM_ALPHA_EXP 0x9026 /* DEC ALPHA */ > +#define EM_IA_64 50 /* Intel Merced */ > +#define EM_X86_64 62 /* AMD x86-64 architecture */ > +#define EM_VAX 75 /* DEC VAX */ > +#define EM_AARCH64 183 /* ARM 64-bit */ Here I similarly think some stripping down might help. Doing so would then also permit to leave out the comment in the middle. > +/* Version */ > +#define EV_NONE 0 /* Invalid */ > +#define EV_CURRENT 1 /* Current */ > +#define EV_NUM 2 /* number of versions */ > + > +/* Program Header */ > +typedef struct { > + Elf32_Word p_type; /* segment type */ > + Elf32_Off p_offset; /* segment offset */ > + Elf32_Addr p_vaddr; /* virtual address of segment */ > + Elf32_Addr p_paddr; /* physical address - ignored? */ > + Elf32_Word p_filesz; /* number of bytes in file for seg. */ > + Elf32_Word p_memsz; /* number of bytes in mem. for seg. */ > + Elf32_Word p_flags; /* flags */ > + Elf32_Word p_align; /* memory alignment */ > +} Elf32_Phdr; > + > +typedef struct { > + Elf64_Word p_type; /* entry type */ > + Elf64_Word p_flags; /* flags */ > + Elf64_Off p_offset; /* offset */ > + Elf64_Addr p_vaddr; /* virtual address */ > + Elf64_Addr p_paddr; /* physical address */ > + Elf64_Xword p_filesz; /* file size */ > + Elf64_Xword p_memsz; /* memory size */ > + Elf64_Xword p_align; /* memory & file alignment */ > +} Elf64_Phdr; > + > +/* Segment types - p_type */ > +#define PT_NULL 0 /* unused */ > +#define PT_LOAD 1 /* loadable segment */ > +#define PT_DYNAMIC 2 /* dynamic linking section */ > +#define PT_INTERP 3 /* the RTLD */ > +#define PT_NOTE 4 /* auxiliary information */ > +#define PT_SHLIB 5 /* reserved - purpose undefined */ > +#define PT_PHDR 6 /* program header */ > +#define PT_NUM 7 /* Number of segment types */ > +#define PT_LOPROC 0x70000000 /* reserved range for processor */ > +#define PT_HIPROC 0x7fffffff /* specific segment types */ > + > +/* Segment flags - p_flags */ > +#define PF_X 0x1 /* Executable */ > +#define PF_W 0x2 /* Writable */ > +#define PF_R 0x4 /* Readable */ > +#define PF_MASKPROC 0xf0000000 /* reserved bits for processor */ > + /* specific segment flags */ > + > +/* Section Header */ > +typedef struct { > + Elf32_Word sh_name; /* name - index into section header > + string table section */ > + Elf32_Word sh_type; /* type */ > + Elf32_Word sh_flags; /* flags */ > + Elf32_Addr sh_addr; /* address */ > + Elf32_Off sh_offset; /* file offset */ > + Elf32_Word sh_size; /* section size */ > + Elf32_Word sh_link; /* section header table index link */ > + Elf32_Word sh_info; /* extra information */ > + Elf32_Word sh_addralign; /* address alignment */ > + Elf32_Word sh_entsize; /* section entry size */ > +} Elf32_Shdr; > + > +typedef struct { > + Elf64_Word sh_name; /* section name */ > + Elf64_Word sh_type; /* section type */ > + Elf64_Xword sh_flags; /* section flags */ > + Elf64_Addr sh_addr; /* virtual address */ > + Elf64_Off sh_offset; /* file offset */ > + Elf64_Xword sh_size; /* section size */ > + Elf64_Word sh_link; /* link to another */ > + Elf64_Word sh_info; /* misc info */ > + Elf64_Xword sh_addralign; /* memory alignment */ > + Elf64_Xword sh_entsize; /* table entry size */ > +} Elf64_Shdr; > + > +/* sh_type */ > +#define SHT_NULL 0 /* inactive */ > +#define SHT_PROGBITS 1 /* program defined information */ > +#define SHT_SYMTAB 2 /* symbol table section */ > +#define SHT_STRTAB 3 /* string table section */ > +#define SHT_RELA 4 /* relocation section with addends*/ > +#define SHT_HASH 5 /* symbol hash table section */ > +#define SHT_DYNAMIC 6 /* dynamic section */ > +#define SHT_NOTE 7 /* note section */ > +#define SHT_NOBITS 8 /* no space section */ > +#define SHT_REL 9 /* relation section without addends */ > +#define SHT_SHLIB 10 /* reserved - purpose unknown */ > +#define SHT_DYNSYM 11 /* dynamic symbol table section */ > +#define SHT_NUM 12 /* number of section types */ > + > +/* Note definitions */ > +typedef struct { > + Elf32_Word namesz; > + Elf32_Word descsz; > + Elf32_Word type; > + char data[]; > +} Elf32_Note; > + > +typedef struct { > + Elf64_Word namesz; > + Elf64_Word descsz; > + Elf64_Word type; > + char data[]; > +} Elf64_Note; > + > +/* Abstraction layer for handling 32- and 64-bit ELF files. */ > + > +typedef union { > + Elf32_Ehdr e32; > + Elf64_Ehdr e64; > +} elf_ehdr; > + > +static inline bool elf_is_32bit(elf_ehdr *ehdr) > +{ > + return ehdr->e32.e_ident[EI_CLASS] == ELFCLASS32; > +} > + > +static inline bool elf_is_64bit(elf_ehdr *ehdr) > +{ > + return ehdr->e32.e_ident[EI_CLASS] == ELFCLASS64; > +} > + > +#define ehdr_val(ehdr, elem) (elf_is_32bit(ehdr) ? (ehdr)->e32.elem : (ehdr)->e64.elem) > + > +typedef union { > + Elf32_Phdr e32; > + Elf64_Phdr e64; > +} elf_phdr; > + > +#define phdr_val(ehdr, phdr, elem) (elf_is_32bit(ehdr) ? (phdr)->e32.elem : (phdr)->e64.elem) > + > +typedef union { > + Elf32_Shdr e32; > + Elf64_Shdr e64; > +} elf_shdr; > + > +#define shdr_val(ehdr, shdr, elem) (elf_is_32bit(ehdr) ? (shdr)->e32.elem : (shdr)->e64.elem) > + > +typedef union { > + Elf32_Note e32; > + Elf64_Note e64; > +} elf_note; > + > +#define note_val(ehdr, note, elem) (elf_is_32bit(ehdr) ? (note)->e32.elem : (note)->e64.elem) > + > +static inline void *elf_ptr_add(void *ptr, unsigned long add) > +{ > + return (char *)ptr + add; You can omit the cast here, can't you? You're the maintainer, so you'll know how many of the comments you want to address. Either way: Reviewed-by: Jan Beulich Jan From minios-devel-bounces@lists.xenproject.org Fri Mar 21 15:53:52 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Mar 2025 15:53:52 +0000 Received: from list by lists.xenproject.org with outflank-mailman.924232.1327534 (Exim 4.92) (envelope-from ) id 1tvegw-0006Gt-Hg; Fri, 21 Mar 2025 15:53:50 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 924232.1327534; Fri, 21 Mar 2025 15:53:50 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvegw-0006GX-AT; Fri, 21 Mar 2025 15:53:50 +0000 Received: by outflank-mailman (input) for mailman id 924232; Fri, 21 Mar 2025 15:53:48 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tvegu-0006DK-GV for minios-devel@lists.xenproject.org; Fri, 21 Mar 2025 15:53:48 +0000 Received: from mail-wm1-x341.google.com (mail-wm1-x341.google.com [2a00:1450:4864:20::341]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id abf25ad9-066c-11f0-9ea1-5ba50f476ded; Fri, 21 Mar 2025 16:53:46 +0100 (CET) Received: by mail-wm1-x341.google.com with SMTP id 5b1f17b1804b1-43d0782d787so15302275e9.0 for ; Fri, 21 Mar 2025 08:53:46 -0700 (PDT) Received: from ?IPV6:2003:e5:873d:1a00:8e99:ce06:aa4a:2e7b? 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<84fa74ee-70e4-4318-9aff-12dcb8db50c1@suse.com> Date: Fri, 21 Mar 2025 16:53:43 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH 03/12] add elf.h To: Jan Beulich Cc: samuel.thibault@ens-lyon.org, minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org References: <20250321092451.17309-1-jgross@suse.com> <20250321092451.17309-4-jgross@suse.com> Content-Language: en-US From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Autocrypt: addr=jgross@suse.com; keydata= xsBNBFOMcBYBCACgGjqjoGvbEouQZw/ToiBg9W98AlM2QHV+iNHsEs7kxWhKMjrioyspZKOB ycWxw3ie3j9uvg9EOB3aN4xiTv4qbnGiTr3oJhkB1gsb6ToJQZ8uxGq2kaV2KL9650I1SJve dYm8Of8Zd621lSmoKOwlNClALZNew72NjJLEzTalU1OdT7/i1TXkH09XSSI8mEQ/ouNcMvIJ NwQpd369y9bfIhWUiVXEK7MlRgUG6MvIj6Y3Am/BBLUVbDa4+gmzDC9ezlZkTZG2t14zWPvx XP3FAp2pkW0xqG7/377qptDmrk42GlSKN4z76ELnLxussxc7I2hx18NUcbP8+uty4bMxABEB AAHNH0p1ZXJnZW4gR3Jvc3MgPGpncm9zc0BzdXNlLmNvbT7CwHkEEwECACMFAlOMcK8CGwMH 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ckptLe8xVF1LYdXXm1WR+KJU9GPBkySzBgvg3ZHqEQ== =FX/H -----END PGP SIGNATURE----- --------------4mym860wkajExf7xG0LLNz4z-- From minios-devel-bounces@lists.xenproject.org Sat Mar 22 23:54:17 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 22 Mar 2025 23:54:17 +0000 Received: from list by lists.xenproject.org with outflank-mailman.924823.1327803 (Exim 4.92) (envelope-from ) id 1tw8fN-0005XN-Or; Sat, 22 Mar 2025 23:54:13 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 924823.1327803; Sat, 22 Mar 2025 23:54:13 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tw8fN-0005XF-La; Sat, 22 Mar 2025 23:54:13 +0000 Received: by outflank-mailman (input) for mailman id 924823; Sat, 22 Mar 2025 23:54:12 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tw8fM-0005X4-Ls for minios-devel@lists.xenproject.org; Sat, 22 Mar 2025 23:54:12 +0000 Received: from sonata.ens-lyon.org (sonata.ens-lyon.org [140.77.166.138]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id f10864fd-0778-11f0-9ffa-bf95429c2676; Sun, 23 Mar 2025 00:54:07 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by sonata.ens-lyon.org (Postfix) with ESMTP id DCFAFA1D52; Sun, 23 Mar 2025 00:54:06 +0100 (CET) Received: from sonata.ens-lyon.org ([127.0.0.1]) by localhost (sonata.ens-lyon.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Gyg923ibEq6p; Sun, 23 Mar 2025 00:54:06 +0100 (CET) Received: from begin (aamiens-653-1-40-48.w83-192.abo.wanadoo.fr [83.192.199.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by sonata.ens-lyon.org (Postfix) with ESMTPSA id A5796A1C52; Sun, 23 Mar 2025 00:54:06 +0100 (CET) Received: from samy by begin with local (Exim 4.98) (envelope-from ) id 1tw8fG-0000000FFWH-0vFQ; Sun, 23 Mar 2025 00:54:06 +0100 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: f10864fd-0778-11f0-9ffa-bf95429c2676 Date: Sun, 23 Mar 2025 00:54:06 +0100 From: Samuel Thibault To: Juergen Gross Cc: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Subject: Re: [MINI-OS PATCH 00/12] kexec: add kexec support to Mini-OS Message-ID: Mail-Followup-To: Samuel Thibault , Juergen Gross , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org References: <20250321092451.17309-1-jgross@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250321092451.17309-1-jgross@suse.com> Organization: I am not organized Hello, Juergen Gross, le ven. 21 mars 2025 10:24:39 +0100, a ecrit: > Add basic kexec support to Mini-OS for running in x86 PVH mode. I am wondering if you had considered using libxc to implement this? The original pv-grub1 is doing it (xen/stubdom/grub/kexec.c) Samuel From minios-devel-bounces@lists.xenproject.org Sun Mar 23 00:01:39 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 23 Mar 2025 00:01:39 +0000 Received: from list by lists.xenproject.org with outflank-mailman.924840.1327822 (Exim 4.92) (envelope-from ) id 1tw8mY-0000Ak-Oo; Sun, 23 Mar 2025 00:01:38 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 924840.1327822; Sun, 23 Mar 2025 00:01:38 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tw8mY-0000AJ-KO; Sun, 23 Mar 2025 00:01:38 +0000 Received: by outflank-mailman (input) for mailman id 924840; Sun, 23 Mar 2025 00:01:36 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tw8mW-00008X-UA for minios-devel@lists.xenproject.org; Sun, 23 Mar 2025 00:01:36 +0000 Received: from sonata.ens-lyon.org (domu-toccata.ens-lyon.fr [140.77.166.138]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id fb45f8ca-0779-11f0-9ea2-5ba50f476ded; Sun, 23 Mar 2025 01:01:34 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by sonata.ens-lyon.org (Postfix) with ESMTP id 89B14A1D52; Sun, 23 Mar 2025 01:01:33 +0100 (CET) Received: from sonata.ens-lyon.org ([127.0.0.1]) by localhost (sonata.ens-lyon.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dv0Voq7M6IJx; Sun, 23 Mar 2025 01:01:33 +0100 (CET) Received: from begin (aamiens-653-1-40-48.w83-192.abo.wanadoo.fr [83.192.199.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by sonata.ens-lyon.org (Postfix) with ESMTPSA id 69BF5A1C52; Sun, 23 Mar 2025 01:01:33 +0100 (CET) Received: from samy by begin with local (Exim 4.98) (envelope-from ) id 1tw8mS-0000000FFr1-44Um; Sun, 23 Mar 2025 01:01:32 +0100 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: fb45f8ca-0779-11f0-9ea2-5ba50f476ded Date: Sun, 23 Mar 2025 01:01:32 +0100 From: Samuel Thibault To: Juergen Gross Cc: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk Subject: Re: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook Message-ID: Mail-Followup-To: Samuel Thibault , Juergen Gross , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-2-jgross@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250321093145.17882-2-jgross@suse.com> Organization: I am not organized Juergen Gross, le ven. 21 mars 2025 10:31:44 +0100, a ecrit: > Add a file operations fstat hook to the 9pfs frontend. > > Signed-off-by: Juergen Gross > Reviewed-by: Jason Andryuk > --- > V2: > - or file access mode into st_mode (Jason Andryuk) > --- > 9pfront.c | 29 +++++++++++++++++++++++++++++ > 1 file changed, 29 insertions(+) > > diff --git a/9pfront.c b/9pfront.c > index 1741d600..7257a07e 100644 > --- a/9pfront.c > +++ b/9pfront.c > @@ -85,6 +85,8 @@ struct file_9pfs { > > #define P9_QID_SIZE 13 > > +#define QID_TYPE_DIR 0x80 /* Applies to qid[0]. */ > + > struct p9_header { > uint32_t size; > uint8_t cmd; > @@ -950,6 +952,32 @@ static int write_9pfs(struct file *file, const void *buf, size_t nbytes) > return ret; > } > > +static int fstat_9pfs(struct file *file, struct stat *buf) > +{ > + struct file_9pfs *f9pfs = file->filedata; > + struct p9_stat stat; > + int ret; > + > + ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); > + if ( ret ) > + { > + errno = EIO; > + return -1; > + } > + > + buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; > + buf->st_mode |= stat.mode & 0777; > + buf->st_atime = stat.atime; > + buf->st_mtime = stat.mtime; Should we perhaps also fill st_ctime? Leaving it at 0 could surprise other software layers. > + buf->st_size = stat.length; > + buf->st_uid = stat.n_uid; > + buf->st_gid = stat.n_gid; > + > + free_stat(&stat); > + > + return 0; > +} > + > static int close_9pfs(struct file *file) > { > struct file_9pfs *f9pfs = file->filedata; > @@ -1296,6 +1324,7 @@ static const struct file_ops ops_9pfs = { > .read = read_9pfs, > .write = write_9pfs, > .close = close_9pfs, > + .fstat = fstat_9pfs, > }; > > __attribute__((constructor)) > -- > 2.43.0 > From minios-devel-bounces@lists.xenproject.org Sun Mar 23 00:02:54 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 23 Mar 2025 00:02:54 +0000 Received: from list by lists.xenproject.org with outflank-mailman.924853.1327831 (Exim 4.92) (envelope-from ) id 1tw8nl-0000jU-Rv; Sun, 23 Mar 2025 00:02:53 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 924853.1327831; Sun, 23 Mar 2025 00:02:53 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tw8nl-0000jM-OL; Sun, 23 Mar 2025 00:02:53 +0000 Received: by outflank-mailman (input) for mailman id 924853; Sun, 23 Mar 2025 00:02:53 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tw8nl-0000jC-1E for minios-devel@lists.xenproject.org; Sun, 23 Mar 2025 00:02:53 +0000 Received: from sonata.ens-lyon.org (domu-toccata.ens-lyon.fr [140.77.166.138]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 29e13cc7-077a-11f0-9ea2-5ba50f476ded; Sun, 23 Mar 2025 01:02:52 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by sonata.ens-lyon.org (Postfix) with ESMTP id C9280A1D52; Sun, 23 Mar 2025 01:02:51 +0100 (CET) Received: from sonata.ens-lyon.org ([127.0.0.1]) by localhost (sonata.ens-lyon.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lcE_MNkmn2Us; Sun, 23 Mar 2025 01:02:51 +0100 (CET) Received: from begin (aamiens-653-1-40-48.w83-192.abo.wanadoo.fr [83.192.199.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by sonata.ens-lyon.org (Postfix) with ESMTPSA id A7169A1C52; Sun, 23 Mar 2025 01:02:51 +0100 (CET) Received: from samy by begin with local (Exim 4.98) (envelope-from ) id 1tw8nj-0000000FFus-0wdp; Sun, 23 Mar 2025 01:02:51 +0100 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 29e13cc7-077a-11f0-9ea2-5ba50f476ded Date: Sun, 23 Mar 2025 01:02:51 +0100 From: Samuel Thibault To: Juergen Gross Cc: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk Subject: Re: [MINI-OS PATCH v2 2/2] 9pfs: add lseek file operation hook Message-ID: Mail-Followup-To: Samuel Thibault , Juergen Gross , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-3-jgross@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250321093145.17882-3-jgross@suse.com> Organization: I am not organized Juergen Gross, le ven. 21 mars 2025 10:31:45 +0100, a ecrit: > Add a file operations lseek hook to the 9pfs frontend. Just use the > lseek_default() implementation. > > Signed-off-by: Juergen Gross > Reviewed-by: Jason Andryuk Reviewed-by: Samuel Thibault > --- > 9pfront.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/9pfront.c b/9pfront.c > index 7257a07e..8bf3a91e 100644 > --- a/9pfront.c > +++ b/9pfront.c > @@ -1325,6 +1325,7 @@ static const struct file_ops ops_9pfs = { > .write = write_9pfs, > .close = close_9pfs, > .fstat = fstat_9pfs, > + .lseek = lseek_default, > }; > > __attribute__((constructor)) > -- > 2.43.0 > From minios-devel-bounces@lists.xenproject.org Sun Mar 23 07:01:19 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 23 Mar 2025 07:01:19 +0000 Received: from list by lists.xenproject.org with outflank-mailman.924886.1327844 (Exim 4.92) (envelope-from ) id 1twFKe-0004aY-6B; Sun, 23 Mar 2025 07:01:16 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 924886.1327844; Sun, 23 Mar 2025 07:01:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1twFKe-0004aR-3Y; Sun, 23 Mar 2025 07:01:16 +0000 Received: by outflank-mailman (input) for mailman id 924886; Sun, 23 Mar 2025 07:01:15 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1twFKd-0004aL-0j for minios-devel@lists.xenproject.org; Sun, 23 Mar 2025 07:01:15 +0000 Received: from mail-ej1-x635.google.com (mail-ej1-x635.google.com [2a00:1450:4864:20::635]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 9b31cf59-07b4-11f0-9ffa-bf95429c2676; Sun, 23 Mar 2025 08:01:12 +0100 (CET) Received: by mail-ej1-x635.google.com with SMTP id a640c23a62f3a-ac2a089fbbdso610523766b.1 for ; Sun, 23 Mar 2025 00:01:12 -0700 (PDT) Received: from ?IPV6:2003:e5:873d:1a00:8e99:ce06:aa4a:2e7b? 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Sun, 23 Mar 2025 00:01:11 -0700 (PDT) Message-ID: <98f92f1f-c1e9-4955-9d04-e31b7e99be29@suse.com> Date: Sun, 23 Mar 2025 08:01:10 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH 00/12] kexec: add kexec support to Mini-OS To: Samuel Thibault , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org References: <20250321092451.17309-1-jgross@suse.com> Content-Language: en-US From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Autocrypt: addr=jgross@suse.com; keydata= xsBNBFOMcBYBCACgGjqjoGvbEouQZw/ToiBg9W98AlM2QHV+iNHsEs7kxWhKMjrioyspZKOB ycWxw3ie3j9uvg9EOB3aN4xiTv4qbnGiTr3oJhkB1gsb6ToJQZ8uxGq2kaV2KL9650I1SJve dYm8Of8Zd621lSmoKOwlNClALZNew72NjJLEzTalU1OdT7/i1TXkH09XSSI8mEQ/ouNcMvIJ NwQpd369y9bfIhWUiVXEK7MlRgUG6MvIj6Y3Am/BBLUVbDa4+gmzDC9ezlZkTZG2t14zWPvx XP3FAp2pkW0xqG7/377qptDmrk42GlSKN4z76ELnLxussxc7I2hx18NUcbP8+uty4bMxABEB AAHNH0p1ZXJnZW4gR3Jvc3MgPGpncm9zc0BzdXNlLmNvbT7CwHkEEwECACMFAlOMcK8CGwMH CwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRCw3p3WKL8TL8eZB/9G0juS/kDY9LhEXseh mE9U+iA1VsLhgDqVbsOtZ/S14LRFHczNd/Lqkn7souCSoyWsBs3/wO+OjPvxf7m+Ef+sMtr0 G5lCWEWa9wa0IXx5HRPW/ScL+e4AVUbL7rurYMfwCzco+7TfjhMEOkC+va5gzi1KrErgNRHH kg3PhlnRY0Udyqx++UYkAsN4TQuEhNN32MvN0Np3WlBJOgKcuXpIElmMM5f1BBzJSKBkW0Jc Wy3h2Wy912vHKpPV/Xv7ZwVJ27v7KcuZcErtptDevAljxJtE7aJG6WiBzm+v9EswyWxwMCIO RoVBYuiocc51872tRGywc03xaQydB+9R7BHPzsBNBFOMcBYBCADLMfoA44MwGOB9YT1V4KCy vAfd7E0BTfaAurbG+Olacciz3yd09QOmejFZC6AnoykydyvTFLAWYcSCdISMr88COmmCbJzn sHAogjexXiif6ANUUlHpjxlHCCcELmZUzomNDnEOTxZFeWMTFF9Rf2k2F0Tl4E5kmsNGgtSa aMO0rNZoOEiD/7UfPP3dfh8JCQ1VtUUsQtT1sxos8Eb/HmriJhnaTZ7Hp3jtgTVkV0ybpgFg w6WMaRkrBh17mV0z2ajjmabB7SJxcouSkR0hcpNl4oM74d2/VqoW4BxxxOD1FcNCObCELfIS auZx+XT6s+CE7Qi/c44ibBMR7hyjdzWbABEBAAHCwF8EGAECAAkFAlOMcBYCGwwACgkQsN6d 1ii/Ey9D+Af/WFr3q+bg/8v5tCknCtn92d5lyYTBNt7xgWzDZX8G6/pngzKyWfedArllp0Pn fgIXtMNV+3t8Li1Tg843EXkP7+2+CQ98MB8XvvPLYAfW8nNDV85TyVgWlldNcgdv7nn1Sq8g HwB2BHdIAkYce3hEoDQXt/mKlgEGsLpzJcnLKimtPXQQy9TxUaLBe9PInPd+Ohix0XOlY+Uk QFEx50Ki3rSDl2Zt2tnkNYKUCvTJq7jvOlaPd6d/W0tZqpyy7KVay+K4aMobDsodB3dvEAs6 ScCnh03dDAFgIq5nsB11j3KPKdVoPlfucX2c7kGNH+LUMbzqV6beIENfNexkOfxHfw== In-Reply-To: Content-Type: multipart/signed; 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name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- wsB5BAABCAAjFiEEhRJncuj2BJSl0Jf3sN6d1ii/Ey8FAmffsbYFAwAAAAAACgkQsN6d1ii/Ey/N hgf+M+Fq3eNeWSvmD8p4/hGDu97CFmlbeo3I80ntpjsjFkFO9pGcQquP/PtNhHkgjgHakNJueBIs OaMCIN8eh3KsxduAX09ySfUVvfnfcgArXV8uIh73pQyzYjU9MF5I9LbtTrGH3qtlfYLL3PYolVSJ YXK4Vfn82HxGwUOvC+3UTl2AXBYvM7KombhLeKPu1CkX8tsfZWgpqFG5n1HUDaJroWqWIxi400F7 zqP1AEVelYkrf/cj3Qa/mxGvwber1WWxOY+B8G6rC6hA2yuMZ3yIwgpd0j4PjxHuiSoH/k/s6z4w RiMlKsVjexA7bPW1+YUs98PGDfLA+iWPNVLilog7qQ== =2HmH -----END PGP SIGNATURE----- --------------Ov7BKYoL1OR330RAoMbHOmhN-- From minios-devel-bounces@lists.xenproject.org Sun Mar 23 14:57:24 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 23 Mar 2025 14:57:24 +0000 Received: from list by lists.xenproject.org with outflank-mailman.925025.1327911 (Exim 4.92) (envelope-from ) id 1twMlP-00057z-60; Sun, 23 Mar 2025 14:57:23 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 925025.1327911; 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Sun, 23 Mar 2025 07:57:18 -0700 (PDT) Message-ID: <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> Date: Sun, 23 Mar 2025 15:57:16 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook To: Samuel Thibault , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-2-jgross@suse.com> Content-Language: en-US From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Autocrypt: addr=jgross@suse.com; keydata= xsBNBFOMcBYBCACgGjqjoGvbEouQZw/ToiBg9W98AlM2QHV+iNHsEs7kxWhKMjrioyspZKOB ycWxw3ie3j9uvg9EOB3aN4xiTv4qbnGiTr3oJhkB1gsb6ToJQZ8uxGq2kaV2KL9650I1SJve dYm8Of8Zd621lSmoKOwlNClALZNew72NjJLEzTalU1OdT7/i1TXkH09XSSI8mEQ/ouNcMvIJ NwQpd369y9bfIhWUiVXEK7MlRgUG6MvIj6Y3Am/BBLUVbDa4+gmzDC9ezlZkTZG2t14zWPvx XP3FAp2pkW0xqG7/377qptDmrk42GlSKN4z76ELnLxussxc7I2hx18NUcbP8+uty4bMxABEB AAHNH0p1ZXJnZW4gR3Jvc3MgPGpncm9zc0BzdXNlLmNvbT7CwHkEEwECACMFAlOMcK8CGwMH CwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRCw3p3WKL8TL8eZB/9G0juS/kDY9LhEXseh mE9U+iA1VsLhgDqVbsOtZ/S14LRFHczNd/Lqkn7souCSoyWsBs3/wO+OjPvxf7m+Ef+sMtr0 G5lCWEWa9wa0IXx5HRPW/ScL+e4AVUbL7rurYMfwCzco+7TfjhMEOkC+va5gzi1KrErgNRHH kg3PhlnRY0Udyqx++UYkAsN4TQuEhNN32MvN0Np3WlBJOgKcuXpIElmMM5f1BBzJSKBkW0Jc Wy3h2Wy912vHKpPV/Xv7ZwVJ27v7KcuZcErtptDevAljxJtE7aJG6WiBzm+v9EswyWxwMCIO RoVBYuiocc51872tRGywc03xaQydB+9R7BHPzsBNBFOMcBYBCADLMfoA44MwGOB9YT1V4KCy vAfd7E0BTfaAurbG+Olacciz3yd09QOmejFZC6AnoykydyvTFLAWYcSCdISMr88COmmCbJzn sHAogjexXiif6ANUUlHpjxlHCCcELmZUzomNDnEOTxZFeWMTFF9Rf2k2F0Tl4E5kmsNGgtSa aMO0rNZoOEiD/7UfPP3dfh8JCQ1VtUUsQtT1sxos8Eb/HmriJhnaTZ7Hp3jtgTVkV0ybpgFg w6WMaRkrBh17mV0z2ajjmabB7SJxcouSkR0hcpNl4oM74d2/VqoW4BxxxOD1FcNCObCELfIS auZx+XT6s+CE7Qi/c44ibBMR7hyjdzWbABEBAAHCwF8EGAECAAkFAlOMcBYCGwwACgkQsN6d 1ii/Ey9D+Af/WFr3q+bg/8v5tCknCtn92d5lyYTBNt7xgWzDZX8G6/pngzKyWfedArllp0Pn fgIXtMNV+3t8Li1Tg843EXkP7+2+CQ98MB8XvvPLYAfW8nNDV85TyVgWlldNcgdv7nn1Sq8g HwB2BHdIAkYce3hEoDQXt/mKlgEGsLpzJcnLKimtPXQQy9TxUaLBe9PInPd+Ohix0XOlY+Uk QFEx50Ki3rSDl2Zt2tnkNYKUCvTJq7jvOlaPd6d/W0tZqpyy7KVay+K4aMobDsodB3dvEAs6 ScCnh03dDAFgIq5nsB11j3KPKdVoPlfucX2c7kGNH+LUMbzqV6beIENfNexkOfxHfw== In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------Q0X04zf4o7oMkpAI85Y62xI6" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------Q0X04zf4o7oMkpAI85Y62xI6 Content-Type: multipart/mixed; boundary="------------40dumUshyvbmw6vMBLOWyoO3"; protected-headers="v1" From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= To: Samuel Thibault , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk Message-ID: <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> Subject: Re: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-2-jgross@suse.com> In-Reply-To: --------------40dumUshyvbmw6vMBLOWyoO3 Content-Type: multipart/mixed; boundary="------------dDQE02dV7F0sVrhUNbepYu91" --------------dDQE02dV7F0sVrhUNbepYu91 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 T24gMjMuMDMuMjUgMDE6MDEsIFNhbXVlbCBUaGliYXVsdCB3cm90ZToNCj4gSnVlcmdlbiBH cm9zcywgbGUgdmVuLiAyMSBtYXJzIDIwMjUgMTA6MzE6NDQgKzAxMDAsIGEgZWNyaXQ6DQo+ PiBBZGQgYSBmaWxlIG9wZXJhdGlvbnMgZnN0YXQgaG9vayB0byB0aGUgOXBmcyBmcm9udGVu ZC4NCj4+DQo+PiBTaWduZWQtb2ZmLWJ5OiBKdWVyZ2VuIEdyb3NzIDxqZ3Jvc3NAc3VzZS5j b20+DQo+PiBSZXZpZXdlZC1ieTogSmFzb24gQW5kcnl1ayA8amFzb24uYW5kcnl1a0BhbWQu Y29tPg0KPj4gLS0tDQo+PiBWMjoNCj4+IC0gb3IgZmlsZSBhY2Nlc3MgbW9kZSBpbnRvIHN0 X21vZGUgKEphc29uIEFuZHJ5dWspDQo+PiAtLS0NCj4+ICAgOXBmcm9udC5jIHwgMjkgKysr KysrKysrKysrKysrKysrKysrKysrKysrKysNCj4+ICAgMSBmaWxlIGNoYW5nZWQsIDI5IGlu c2VydGlvbnMoKykNCj4+DQo+PiBkaWZmIC0tZ2l0IGEvOXBmcm9udC5jIGIvOXBmcm9udC5j DQo+PiBpbmRleCAxNzQxZDYwMC4uNzI1N2EwN2UgMTAwNjQ0DQo+PiAtLS0gYS85cGZyb250 LmMNCj4+ICsrKyBiLzlwZnJvbnQuYw0KPj4gQEAgLTg1LDYgKzg1LDggQEAgc3RydWN0IGZp bGVfOXBmcyB7DQo+PiAgIA0KPj4gICAjZGVmaW5lIFA5X1FJRF9TSVpFICAgIDEzDQo+PiAg IA0KPj4gKyNkZWZpbmUgUUlEX1RZUEVfRElSICAgMHg4MCAgICAgLyogQXBwbGllcyB0byBx aWRbMF0uICovDQo+PiArDQo+PiAgIHN0cnVjdCBwOV9oZWFkZXIgew0KPj4gICAgICAgdWlu dDMyX3Qgc2l6ZTsNCj4+ICAgICAgIHVpbnQ4X3QgY21kOw0KPj4gQEAgLTk1MCw2ICs5NTIs MzIgQEAgc3RhdGljIGludCB3cml0ZV85cGZzKHN0cnVjdCBmaWxlICpmaWxlLCBjb25zdCB2 b2lkICpidWYsIHNpemVfdCBuYnl0ZXMpDQo+PiAgICAgICByZXR1cm4gcmV0Ow0KPj4gICB9 DQo+PiAgIA0KPj4gK3N0YXRpYyBpbnQgZnN0YXRfOXBmcyhzdHJ1Y3QgZmlsZSAqZmlsZSwg c3RydWN0IHN0YXQgKmJ1ZikNCj4+ICt7DQo+PiArICAgIHN0cnVjdCBmaWxlXzlwZnMgKmY5 cGZzID0gZmlsZS0+ZmlsZWRhdGE7DQo+PiArICAgIHN0cnVjdCBwOV9zdGF0IHN0YXQ7DQo+ PiArICAgIGludCByZXQ7DQo+PiArDQo+PiArICAgIHJldCA9IHA5X3N0YXQoZjlwZnMtPmRl diwgZjlwZnMtPmZpZCwgJnN0YXQpOw0KPj4gKyAgICBpZiAoIHJldCApDQo+PiArICAgIHsN Cj4+ICsgICAgICAgIGVycm5vID0gRUlPOw0KPj4gKyAgICAgICAgcmV0dXJuIC0xOw0KPj4g KyAgICB9DQo+PiArDQo+PiArICAgIGJ1Zi0+c3RfbW9kZSA9IChzdGF0LnFpZFswXSA9PSBR SURfVFlQRV9ESVIpID8gU19JRkRJUiA6IFNfSUZSRUc7DQo+PiArICAgIGJ1Zi0+c3RfbW9k ZSB8PSBzdGF0Lm1vZGUgJiAwNzc3Ow0KPj4gKyAgICBidWYtPnN0X2F0aW1lID0gc3RhdC5h dGltZTsNCj4+ICsgICAgYnVmLT5zdF9tdGltZSA9IHN0YXQubXRpbWU7DQo+IA0KPiBTaG91 bGQgd2UgcGVyaGFwcyBhbHNvIGZpbGwgc3RfY3RpbWU/IExlYXZpbmcgaXQgYXQgMCBjb3Vs ZCBzdXJwcmlzZQ0KPiBvdGhlciBzb2Z0d2FyZSBsYXllcnMuDQoNCkkgY2FuIHNldCBpdCB0 byB0aGUgc2FtZSB2YWx1ZSBhcyBzdF9tdGltZS4gSSBkb24ndCB0aGluayB0aGVyZSBpcyBh IHdheQ0KdG8gZ2V0IHRoZSAicmVhbCIgY3RpbWUgdmFsdWUgdmlhIHRoZSA5cCBwcm90b2Nv bC4NCg0KDQpKdWVyZ2VuDQo= --------------dDQE02dV7F0sVrhUNbepYu91 Content-Type: application/pgp-keys; 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name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- wsB5BAABCAAjFiEEhRJncuj2BJSl0Jf3sN6d1ii/Ey8FAmfgIU0FAwAAAAAACgkQsN6d1ii/Ey9R fwf/Y1yj6p786U/PIL0zY4D1syNOiZjmKXpGITCping8aoZz9wX8afrGBdF4zwVzoaf9+oejctP+ qA/iu9mgzwUp/sBZkGeterqWeUbADwAPFJN4AW8YJLNruOYGMedWTwThfZGnof0z34hW2H2iwUaG 7/zddhu/2gvB4JOyq73sHd+yt3crAzzsn53f7bObIn4rZnZvDFA/sLzRfOv/fToDNPXAtLr2YOVU 6p3SkDuhceBI5GkmC4frs9EhCHzS2olhMiwu/FLWcB6cS8ezn83YsR8EdCsEaWG5wbf2LCMDboMU 1EDIvBs812MLHx6iZY8pP7yh4hF9D/AahXsJeIGmHg== =ozOc -----END PGP SIGNATURE----- --------------Q0X04zf4o7oMkpAI85Y62xI6-- From minios-devel-bounces@lists.xenproject.org Sun Mar 23 14:58:27 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sun, 23 Mar 2025 14:58:27 +0000 Received: from list by lists.xenproject.org with outflank-mailman.925038.1327934 (Exim 4.92) (envelope-from ) id 1twMmQ-0005xt-Nm; Sun, 23 Mar 2025 14:58:26 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 925038.1327934; 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Sun, 23 Mar 2025 15:58:17 +0100 (CET) Received: from begin (aamiens-653-1-40-48.w83-192.abo.wanadoo.fr [83.192.199.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by sonata.ens-lyon.org (Postfix) with ESMTPSA id 1A7A3A20EC; Sun, 23 Mar 2025 15:58:17 +0100 (CET) Received: from samy by begin with local (Exim 4.98) (envelope-from ) id 1twMmG-0000000Gng4-2HjL; Sun, 23 Mar 2025 15:58:16 +0100 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 40dd8031-07f7-11f0-9ffa-bf95429c2676 Date: Sun, 23 Mar 2025 15:58:16 +0100 From: Samuel Thibault To: =?utf-8?B?SsO8cmdlbiBHcm/Dnw==?= Cc: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk Subject: Re: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook Message-ID: Mail-Followup-To: Samuel Thibault , =?utf-8?B?SsO8cmdlbiBHcm/Dnw==?= , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-2-jgross@suse.com> <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> Organization: I am not organized Jürgen Groß, le dim. 23 mars 2025 15:57:16 +0100, a ecrit: > On 23.03.25 01:01, Samuel Thibault wrote: > > Juergen Gross, le ven. 21 mars 2025 10:31:44 +0100, a ecrit: > > > Add a file operations fstat hook to the 9pfs frontend. > > > > > > Signed-off-by: Juergen Gross > > > Reviewed-by: Jason Andryuk > > > --- > > > V2: > > > - or file access mode into st_mode (Jason Andryuk) > > > --- > > > 9pfront.c | 29 +++++++++++++++++++++++++++++ > > > 1 file changed, 29 insertions(+) > > > > > > diff --git a/9pfront.c b/9pfront.c > > > index 1741d600..7257a07e 100644 > > > --- a/9pfront.c > > > +++ b/9pfront.c > > > @@ -85,6 +85,8 @@ struct file_9pfs { > > > #define P9_QID_SIZE 13 > > > +#define QID_TYPE_DIR 0x80 /* Applies to qid[0]. */ > > > + > > > struct p9_header { > > > uint32_t size; > > > uint8_t cmd; > > > @@ -950,6 +952,32 @@ static int write_9pfs(struct file *file, const void *buf, size_t nbytes) > > > return ret; > > > } > > > +static int fstat_9pfs(struct file *file, struct stat *buf) > > > +{ > > > + struct file_9pfs *f9pfs = file->filedata; > > > + struct p9_stat stat; > > > + int ret; > > > + > > > + ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); > > > + if ( ret ) > > > + { > > > + errno = EIO; > > > + return -1; > > > + } > > > + > > > + buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; > > > + buf->st_mode |= stat.mode & 0777; > > > + buf->st_atime = stat.atime; > > > + buf->st_mtime = stat.mtime; > > > > Should we perhaps also fill st_ctime? Leaving it at 0 could surprise > > other software layers. > > I can set it to the same value as st_mtime. That'd be preferrable, yes. With that, Reviewed-by: Samuel Thibault Thanks! 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Mon, 24 Mar 2025 02:25:03 -0700 (PDT) Message-ID: <678026b3-c794-4b60-83e6-ff2a54384171@suse.com> Date: Mon, 24 Mar 2025 10:25:05 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH 03/12] add elf.h To: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Cc: samuel.thibault@ens-lyon.org, minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org References: <20250321092451.17309-1-jgross@suse.com> <20250321092451.17309-4-jgross@suse.com> <84fa74ee-70e4-4318-9aff-12dcb8db50c1@suse.com> Content-Language: en-US From: Jan Beulich Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: <84fa74ee-70e4-4318-9aff-12dcb8db50c1@suse.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 21.03.2025 16:53, Jürgen Groß wrote: > On 21.03.25 14:51, Jan Beulich wrote: >> On 21.03.2025 10:24, Juergen Gross wrote: >>> +/* e_type */ >>> +#define ET_NONE 0 /* No file type */ >>> +#define ET_REL 1 /* relocatable file */ >>> +#define ET_EXEC 2 /* executable file */ >>> +#define ET_DYN 3 /* shared object file */ >>> +#define ET_CORE 4 /* core file */ >>> +#define ET_NUM 5 /* number of types */ >>> +#define ET_LOPROC 0xff00 /* reserved range for processor */ >>> +#define ET_HIPROC 0xffff /* specific e_type */ >>> + >>> +/* e_machine */ >>> +#define EM_NONE 0 /* No Machine */ >>> +#define EM_M32 1 /* AT&T WE 32100 */ >>> +#define EM_SPARC 2 /* SPARC */ >>> +#define EM_386 3 /* Intel 80386 */ >>> +#define EM_68K 4 /* Motorola 68000 */ >>> +#define EM_88K 5 /* Motorola 88000 */ >>> +#define EM_486 6 /* Intel 80486 - unused? */ >>> +#define EM_860 7 /* Intel 80860 */ >>> +#define EM_MIPS 8 /* MIPS R3000 Big-Endian only */ >>> +/* >>> + * Don't know if EM_MIPS_RS4_BE, >>> + * EM_SPARC64, EM_PARISC, >>> + * or EM_PPC are ABI compliant >>> + */ >>> +#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ >>> +#define EM_SPARC64 11 /* SPARC v9 64-bit unoffical */ >>> +#define EM_PARISC 15 /* HPPA */ >>> +#define EM_SPARC32PLUS 18 /* Enhanced instruction set SPARC */ >>> +#define EM_PPC 20 /* PowerPC */ >>> +#define EM_PPC64 21 /* PowerPC 64-bit */ >>> +#define EM_ARM 40 /* Advanced RISC Machines ARM */ >>> +#define EM_ALPHA 41 /* DEC ALPHA */ >>> +#define EM_SPARCV9 43 /* SPARC version 9 */ >>> +#define EM_ALPHA_EXP 0x9026 /* DEC ALPHA */ >>> +#define EM_IA_64 50 /* Intel Merced */ >>> +#define EM_X86_64 62 /* AMD x86-64 architecture */ >>> +#define EM_VAX 75 /* DEC VAX */ >>> +#define EM_AARCH64 183 /* ARM 64-bit */ >> >> Here I similarly think some stripping down might help. Doing so would then >> also permit to leave out the comment in the middle. > > Here I'm a little bit more on the edge. Some historical entries can > probably be dropped, but which ones would want to stay? The ones we presently need for any of the architectures we have (partial) ports for in the hypervisor, or that the hypervisor targets for compatibility. 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Mon, 24 Mar 2025 03:21:49 -0700 (PDT) Message-ID: Date: Mon, 24 Mar 2025 11:21:48 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook To: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-2-jgross@suse.com> <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> Content-Language: en-US Cc: Samuel Thibault , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk From: Jan Beulich Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 23.03.2025 15:57, Jürgen Groß wrote: > On 23.03.25 01:01, Samuel Thibault wrote: >> Juergen Gross, le ven. 21 mars 2025 10:31:44 +0100, a ecrit: >>> Add a file operations fstat hook to the 9pfs frontend. >>> >>> Signed-off-by: Juergen Gross >>> Reviewed-by: Jason Andryuk >>> --- >>> V2: >>> - or file access mode into st_mode (Jason Andryuk) >>> --- >>> 9pfront.c | 29 +++++++++++++++++++++++++++++ >>> 1 file changed, 29 insertions(+) >>> >>> diff --git a/9pfront.c b/9pfront.c >>> index 1741d600..7257a07e 100644 >>> --- a/9pfront.c >>> +++ b/9pfront.c >>> @@ -85,6 +85,8 @@ struct file_9pfs { >>> >>> #define P9_QID_SIZE 13 >>> >>> +#define QID_TYPE_DIR 0x80 /* Applies to qid[0]. */ >>> + >>> struct p9_header { >>> uint32_t size; >>> uint8_t cmd; >>> @@ -950,6 +952,32 @@ static int write_9pfs(struct file *file, const void *buf, size_t nbytes) >>> return ret; >>> } >>> >>> +static int fstat_9pfs(struct file *file, struct stat *buf) >>> +{ >>> + struct file_9pfs *f9pfs = file->filedata; >>> + struct p9_stat stat; >>> + int ret; >>> + >>> + ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); >>> + if ( ret ) >>> + { >>> + errno = EIO; >>> + return -1; >>> + } >>> + >>> + buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; >>> + buf->st_mode |= stat.mode & 0777; >>> + buf->st_atime = stat.atime; >>> + buf->st_mtime = stat.mtime; >> >> Should we perhaps also fill st_ctime? Leaving it at 0 could surprise >> other software layers. > > I can set it to the same value as st_mtime. Maybe the smaller of atime and mtime? Jan > I don't think there is a way > to get the "real" ctime value via the 9p protocol. > > > Juergen From minios-devel-bounces@lists.xenproject.org Mon Mar 24 10:30:47 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 24 Mar 2025 10:30:47 +0000 Received: from list by lists.xenproject.org with outflank-mailman.925303.1328177 (Exim 4.92) (envelope-from ) id 1twf4w-0000ik-8x; Mon, 24 Mar 2025 10:30:46 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 925303.1328177; Mon, 24 Mar 2025 10:30:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1twf4w-0000id-59; Mon, 24 Mar 2025 10:30:46 +0000 Received: by outflank-mailman (input) for mailman id 925303; Mon, 24 Mar 2025 10:30:44 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1twf4u-0000cl-MF for minios-devel@lists.xenproject.org; Mon, 24 Mar 2025 10:30:44 +0000 Received: from sonata.ens-lyon.org (domu-toccata.ens-lyon.fr [140.77.166.138]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 072795e4-089b-11f0-9ffa-bf95429c2676; Mon, 24 Mar 2025 11:30:38 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by sonata.ens-lyon.org (Postfix) with ESMTP id 00E54A0215; Mon, 24 Mar 2025 11:30:38 +0100 (CET) Received: from sonata.ens-lyon.org ([127.0.0.1]) by localhost (sonata.ens-lyon.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id coyK-WkaRptV; Mon, 24 Mar 2025 11:30:37 +0100 (CET) Received: from begin (nat-inria-interne-52-gw-01-bso.bordeaux.inria.fr [194.199.1.52]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by sonata.ens-lyon.org (Postfix) with ESMTPSA id B94B3A01A9; Mon, 24 Mar 2025 11:30:37 +0100 (CET) Received: from samy by begin with local (Exim 4.98) (envelope-from ) id 1twf4n-0000000A8Du-29Je; Mon, 24 Mar 2025 11:30:37 +0100 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: 072795e4-089b-11f0-9ffa-bf95429c2676 Date: Mon, 24 Mar 2025 11:30:37 +0100 From: Samuel Thibault To: Jan Beulich Cc: =?utf-8?B?SsO8cmdlbiBHcm/Dnw==?= , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk Subject: Re: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook Message-ID: Mail-Followup-To: Samuel Thibault , Jan Beulich , =?utf-8?B?SsO8cmdlbiBHcm/Dnw==?= , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-2-jgross@suse.com> <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Organization: I am not organized Jan Beulich, le lun. 24 mars 2025 11:21:48 +0100, a ecrit: > On 23.03.2025 15:57, Jürgen Groß wrote: > > On 23.03.25 01:01, Samuel Thibault wrote: > >> Juergen Gross, le ven. 21 mars 2025 10:31:44 +0100, a ecrit: > >>> Add a file operations fstat hook to the 9pfs frontend. > >>> > >>> Signed-off-by: Juergen Gross > >>> Reviewed-by: Jason Andryuk > >>> --- > >>> V2: > >>> - or file access mode into st_mode (Jason Andryuk) > >>> --- > >>> 9pfront.c | 29 +++++++++++++++++++++++++++++ > >>> 1 file changed, 29 insertions(+) > >>> > >>> diff --git a/9pfront.c b/9pfront.c > >>> index 1741d600..7257a07e 100644 > >>> --- a/9pfront.c > >>> +++ b/9pfront.c > >>> @@ -85,6 +85,8 @@ struct file_9pfs { > >>> > >>> #define P9_QID_SIZE 13 > >>> > >>> +#define QID_TYPE_DIR 0x80 /* Applies to qid[0]. */ > >>> + > >>> struct p9_header { > >>> uint32_t size; > >>> uint8_t cmd; > >>> @@ -950,6 +952,32 @@ static int write_9pfs(struct file *file, const void *buf, size_t nbytes) > >>> return ret; > >>> } > >>> > >>> +static int fstat_9pfs(struct file *file, struct stat *buf) > >>> +{ > >>> + struct file_9pfs *f9pfs = file->filedata; > >>> + struct p9_stat stat; > >>> + int ret; > >>> + > >>> + ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); > >>> + if ( ret ) > >>> + { > >>> + errno = EIO; > >>> + return -1; > >>> + } > >>> + > >>> + buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; > >>> + buf->st_mode |= stat.mode & 0777; > >>> + buf->st_atime = stat.atime; > >>> + buf->st_mtime = stat.mtime; > >> > >> Should we perhaps also fill st_ctime? Leaving it at 0 could surprise > >> other software layers. > > > > I can set it to the same value as st_mtime. > > Maybe the smaller of atime and mtime? That'd be better, yes. Samuel From minios-devel-bounces@lists.xenproject.org Mon Mar 24 11:18:26 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 24 Mar 2025 11:18:26 +0000 Received: from list by lists.xenproject.org with outflank-mailman.925368.1328236 (Exim 4.92) (envelope-from ) id 1twfp2-00055p-U9; Mon, 24 Mar 2025 11:18:24 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 925368.1328236; Mon, 24 Mar 2025 11:18:24 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1twfp2-000553-Ow; Mon, 24 Mar 2025 11:18:24 +0000 Received: by outflank-mailman (input) for mailman id 925368; Mon, 24 Mar 2025 11:18:23 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1twfp1-00052W-If for minios-devel@lists.xenproject.org; Mon, 24 Mar 2025 11:18:23 +0000 Received: from mail-ed1-x535.google.com (mail-ed1-x535.google.com [2a00:1450:4864:20::535]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id b1309b49-08a1-11f0-9ffa-bf95429c2676; Mon, 24 Mar 2025 12:18:21 +0100 (CET) Received: by mail-ed1-x535.google.com with SMTP id 4fb4d7f45d1cf-5e5e8274a74so6441760a12.1 for ; Mon, 24 Mar 2025 04:18:21 -0700 (PDT) Received: from ?IPV6:2003:e5:873d:1a00:8e99:ce06:aa4a:2e7b? 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Mon, 24 Mar 2025 04:18:19 -0700 (PDT) Message-ID: <2fa05dd3-c5ae-4e72-b42d-260433590187@suse.com> Date: Mon, 24 Mar 2025 12:18:18 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook To: Samuel Thibault , Jan Beulich , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-2-jgross@suse.com> <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> Content-Language: en-US From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Autocrypt: addr=jgross@suse.com; keydata= xsBNBFOMcBYBCACgGjqjoGvbEouQZw/ToiBg9W98AlM2QHV+iNHsEs7kxWhKMjrioyspZKOB ycWxw3ie3j9uvg9EOB3aN4xiTv4qbnGiTr3oJhkB1gsb6ToJQZ8uxGq2kaV2KL9650I1SJve dYm8Of8Zd621lSmoKOwlNClALZNew72NjJLEzTalU1OdT7/i1TXkH09XSSI8mEQ/ouNcMvIJ NwQpd369y9bfIhWUiVXEK7MlRgUG6MvIj6Y3Am/BBLUVbDa4+gmzDC9ezlZkTZG2t14zWPvx XP3FAp2pkW0xqG7/377qptDmrk42GlSKN4z76ELnLxussxc7I2hx18NUcbP8+uty4bMxABEB AAHNH0p1ZXJnZW4gR3Jvc3MgPGpncm9zc0BzdXNlLmNvbT7CwHkEEwECACMFAlOMcK8CGwMH CwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRCw3p3WKL8TL8eZB/9G0juS/kDY9LhEXseh mE9U+iA1VsLhgDqVbsOtZ/S14LRFHczNd/Lqkn7souCSoyWsBs3/wO+OjPvxf7m+Ef+sMtr0 G5lCWEWa9wa0IXx5HRPW/ScL+e4AVUbL7rurYMfwCzco+7TfjhMEOkC+va5gzi1KrErgNRHH kg3PhlnRY0Udyqx++UYkAsN4TQuEhNN32MvN0Np3WlBJOgKcuXpIElmMM5f1BBzJSKBkW0Jc Wy3h2Wy912vHKpPV/Xv7ZwVJ27v7KcuZcErtptDevAljxJtE7aJG6WiBzm+v9EswyWxwMCIO RoVBYuiocc51872tRGywc03xaQydB+9R7BHPzsBNBFOMcBYBCADLMfoA44MwGOB9YT1V4KCy vAfd7E0BTfaAurbG+Olacciz3yd09QOmejFZC6AnoykydyvTFLAWYcSCdISMr88COmmCbJzn sHAogjexXiif6ANUUlHpjxlHCCcELmZUzomNDnEOTxZFeWMTFF9Rf2k2F0Tl4E5kmsNGgtSa aMO0rNZoOEiD/7UfPP3dfh8JCQ1VtUUsQtT1sxos8Eb/HmriJhnaTZ7Hp3jtgTVkV0ybpgFg w6WMaRkrBh17mV0z2ajjmabB7SJxcouSkR0hcpNl4oM74d2/VqoW4BxxxOD1FcNCObCELfIS auZx+XT6s+CE7Qi/c44ibBMR7hyjdzWbABEBAAHCwF8EGAECAAkFAlOMcBYCGwwACgkQsN6d 1ii/Ey9D+Af/WFr3q+bg/8v5tCknCtn92d5lyYTBNt7xgWzDZX8G6/pngzKyWfedArllp0Pn fgIXtMNV+3t8Li1Tg843EXkP7+2+CQ98MB8XvvPLYAfW8nNDV85TyVgWlldNcgdv7nn1Sq8g HwB2BHdIAkYce3hEoDQXt/mKlgEGsLpzJcnLKimtPXQQy9TxUaLBe9PInPd+Ohix0XOlY+Uk QFEx50Ki3rSDl2Zt2tnkNYKUCvTJq7jvOlaPd6d/W0tZqpyy7KVay+K4aMobDsodB3dvEAs6 ScCnh03dDAFgIq5nsB11j3KPKdVoPlfucX2c7kGNH+LUMbzqV6beIENfNexkOfxHfw== In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------93VhOJVDM4Aui2kdG0uWoMhH" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------93VhOJVDM4Aui2kdG0uWoMhH Content-Type: multipart/mixed; boundary="------------sWzNZouI0XYebMzUCklyKNWW"; protected-headers="v1" From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= To: Samuel Thibault , Jan Beulich , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk Message-ID: <2fa05dd3-c5ae-4e72-b42d-260433590187@suse.com> Subject: Re: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-2-jgross@suse.com> <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> In-Reply-To: Autocrypt-Gossip: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJ3BBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AAIQkQoDSui/t3IH4WIQQ+pJkfkcoLMCa4X6CgNK6L+3cgfgn7AJ9DmMd0SMJE ePbc7/m22D2v04iu7ACffXTdZQhNl557tJuDXZSBxDmW/tLOwU0EWTecRBAIAIK5OMKMU5R2 Lk2bbjgX7vyQuCFFyKf9rC/4itNwhYWFSlKzVj3WJBDsoi2KvPm7AI+XB6NIkNAkshL5C0kd pcNd5Xo0jRR5/WE/bT7LyrJ0OJWS/qUit5eNNvsO+SxGAk28KRa1ieVLeZi9D03NL0+HIAtZ tecfqwgl3Y72UpLUyt+r7LQhcI/XR5IUUaD4C/chB4Vq2QkDKO7Q8+2HJOrFIjiVli4lU+Sf OBp64m//Y1xys++Z4ODoKh7tkh5DxiO3QBHG7bHK0CSQsJ6XUvPVYubAuy1XfSDzSeSBl//C v78Fclb+gi9GWidSTG/4hsEzd1fY5XwCZG/XJJY9M/sAAwUH/09Ar9W2U1Qm+DwZeP2ii3Ou 14Z9VlVVPhcEmR/AFykL9dw/OV2O/7cdi52+l00reUu6Nd4Dl8s4f5n8b1YFzmkVVIyhwjvU jxtPyUgDOt6DRa+RaDlXZZmxQyWcMv2anAgYWGVszeB8Myzsw8y7xhBEVV1S+1KloCzw4V8Z DSJrcsZlyMDoiTb7FyqxwQnM0f6qHxWbmOOnbzJmBqpNpFuDcz/4xNsymJylm6oXiucHQBAP Xb/cE1YNHpuaH4SRhIxwQilCYEznWowQphNAbJtEKOmcocY7EbSt8VjXTzmYENkIfkrHRyXQ dUm5AoL51XZljkCqNwrADGkTvkwsWSvCSQQYEQIACQUCWTecRAIbDAAKCRCgNK6L+3cgfuef AJ9wlZQNQUp0KwEf8Tl37RmcxCL4bQCcC5alCSMzUBJ5DBIcR4BY+CyQFAs= --------------sWzNZouI0XYebMzUCklyKNWW Content-Type: multipart/mixed; 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Mon, 24 Mar 2025 04:26:23 -0700 (PDT) Message-ID: <28e23122-6cfd-464d-99f4-4ac45b8b79d0@suse.com> Date: Mon, 24 Mar 2025 12:26:22 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MINI-OS PATCH v2 1/2] 9pfs: add fstat file operation hook To: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= References: <20250321093145.17882-1-jgross@suse.com> <20250321093145.17882-2-jgross@suse.com> <79a51a80-7723-4f58-b0ea-25f73d4fd796@suse.com> <2fa05dd3-c5ae-4e72-b42d-260433590187@suse.com> Content-Language: en-US Cc: Samuel Thibault , minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org, Jason Andryuk From: Jan Beulich Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: <2fa05dd3-c5ae-4e72-b42d-260433590187@suse.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 24.03.2025 12:18, Jürgen Groß wrote: > On 24.03.25 11:30, Samuel Thibault wrote: >> Jan Beulich, le lun. 24 mars 2025 11:21:48 +0100, a ecrit: >>> On 23.03.2025 15:57, Jürgen Groß wrote: >>>> On 23.03.25 01:01, Samuel Thibault wrote: >>>>> Juergen Gross, le ven. 21 mars 2025 10:31:44 +0100, a ecrit: >>>>>> Add a file operations fstat hook to the 9pfs frontend. >>>>>> >>>>>> Signed-off-by: Juergen Gross >>>>>> Reviewed-by: Jason Andryuk >>>>>> --- >>>>>> V2: >>>>>> - or file access mode into st_mode (Jason Andryuk) >>>>>> --- >>>>>> 9pfront.c | 29 +++++++++++++++++++++++++++++ >>>>>> 1 file changed, 29 insertions(+) >>>>>> >>>>>> diff --git a/9pfront.c b/9pfront.c >>>>>> index 1741d600..7257a07e 100644 >>>>>> --- a/9pfront.c >>>>>> +++ b/9pfront.c >>>>>> @@ -85,6 +85,8 @@ struct file_9pfs { >>>>>> >>>>>> #define P9_QID_SIZE 13 >>>>>> >>>>>> +#define QID_TYPE_DIR 0x80 /* Applies to qid[0]. */ >>>>>> + >>>>>> struct p9_header { >>>>>> uint32_t size; >>>>>> uint8_t cmd; >>>>>> @@ -950,6 +952,32 @@ static int write_9pfs(struct file *file, const void *buf, size_t nbytes) >>>>>> return ret; >>>>>> } >>>>>> >>>>>> +static int fstat_9pfs(struct file *file, struct stat *buf) >>>>>> +{ >>>>>> + struct file_9pfs *f9pfs = file->filedata; >>>>>> + struct p9_stat stat; >>>>>> + int ret; >>>>>> + >>>>>> + ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); >>>>>> + if ( ret ) >>>>>> + { >>>>>> + errno = EIO; >>>>>> + return -1; >>>>>> + } >>>>>> + >>>>>> + buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; >>>>>> + buf->st_mode |= stat.mode & 0777; >>>>>> + buf->st_atime = stat.atime; >>>>>> + buf->st_mtime = stat.mtime; >>>>> >>>>> Should we perhaps also fill st_ctime? Leaving it at 0 could surprise >>>>> other software layers. >>>> >>>> I can set it to the same value as st_mtime. >>> >>> Maybe the smaller of atime and mtime? >> >> That'd be better, yes. > > According to the references I could find ctime is changed whenever > either file contents OR file status (uid, gid, permissions) are > modified. So using the same value as mtime seems appropriate. Hmm, yes, one always learns something new. Having come from the DOS/Windows world originally, 'c' in the name to me only ever could stand for "create". When really, as you say, it's "change". I'm sorry for introducing confusion here. 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Tue, 25 Mar 2025 09:24:31 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: f5f9e215-095a-11f0-9ea3-5ba50f476ded DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742894672; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=ZTqQ8xUypzZhhhoaST+VUqDY+Lww+7VAFgGiGzWGpW8=; b=iH0kQqa9P8iC9IE/rUJE/e1pLc5rdSTjsQULAvL5a0G8xs2aHtkdjws4KMdFX11c25gdJX XiI5RTSAOWswSjv367XExgXKdP5nisjEhGj3a9bVU2LWxZ/5N4f6e4z1RpB+eKkKC85Caa QbiQ0uABsZRTMgsDDV/7J4j62JkUS44= Authentication-Results: smtp-out1.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=iH0kQqa9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742894672; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=ZTqQ8xUypzZhhhoaST+VUqDY+Lww+7VAFgGiGzWGpW8=; b=iH0kQqa9P8iC9IE/rUJE/e1pLc5rdSTjsQULAvL5a0G8xs2aHtkdjws4KMdFX11c25gdJX XiI5RTSAOWswSjv367XExgXKdP5nisjEhGj3a9bVU2LWxZ/5N4f6e4z1RpB+eKkKC85Caa QbiQ0uABsZRTMgsDDV/7J4j62JkUS44= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH v3 0/2] 9pfs: add some file operation hooks Date: Tue, 25 Mar 2025 10:24:26 +0100 Message-ID: <20250325092428.23040-1-jgross@suse.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 26C5E2116E X-Spam-Level: X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[99.98%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; MIME_TRACE(0.00)[0:+]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; TO_DN_SOME(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,suse.com:dkim,suse.com:mid]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; DKIM_TRACE(0.00)[suse.com:+] X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action X-Spam-Score: -3.01 X-Spam-Flag: NO For being able to store the Xenstore state in preparation of a live update operation, 9pfront is needing support for fstat and lseek. Changes in V2: - addressed comment for patch 1 Changes in V3: - addressed comment for patch 1 Juergen Gross (2): 9pfs: add fstat file operation hook 9pfs: add lseek file operation hook 9pfront.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Tue Mar 25 09:24:41 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 25 Mar 2025 09:24:41 +0000 Received: from list by lists.xenproject.org with outflank-mailman.926180.1329053 (Exim 4.92) (envelope-from ) id 1tx0WX-0005Cs-PB; Tue, 25 Mar 2025 09:24:41 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 926180.1329053; Tue, 25 Mar 2025 09:24:41 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tx0WX-0005Bw-K1; Tue, 25 Mar 2025 09:24:41 +0000 Received: by outflank-mailman (input) for mailman id 926180; Tue, 25 Mar 2025 09:24:40 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1tx0WW-00059a-UC for minios-devel@lists.xenproject.org; Tue, 25 Mar 2025 09:24:40 +0000 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id f945e144-095a-11f0-9ffa-bf95429c2676; Tue, 25 Mar 2025 10:24:39 +0100 (CET) Received: from imap1.dmz-prg2.suse.org (unknown [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id E505C2116E; Tue, 25 Mar 2025 09:24:37 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id B245F137AC; Tue, 25 Mar 2025 09:24:37 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id BwXGKVV24md8MwAAD6G6ig (envelope-from ); Tue, 25 Mar 2025 09:24:37 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: f945e144-095a-11f0-9ffa-bf95429c2676 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742894678; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jP7aTmS4mgfcI53w0C1wXKRp4YRB4henwetMoPS3Xbc=; b=BVNa6zYr3Lz9nnkkVEjC1w/f583zGhf/MUZWE4YsdcbfEG3oQPIfkSJmiT14+BGawmzr39 GgDPchOgUbD3pY+9BQbeqIV/gPobr2WMl6vMSK7vMNzmKMtdrYYPX0aEtWMSse+49qzYEF 7YmyNi67es01byxrf7mS9s7MhvdTPS0= Authentication-Results: smtp-out1.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742894677; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jP7aTmS4mgfcI53w0C1wXKRp4YRB4henwetMoPS3Xbc=; b=CfXjrCTA/QIbWCgwtvMAQTOS7aGbYI/BACsp/4aNNq8izWoPeOx3Bjho5QVbQJmLoqUsfS a/PDKcdP0Nmaxtd+vwRILiofM5jJxuKaX2asjNP0xvVcCE8IYDgsNixlx8rercVkYBsqG6 WnRo7ccR1DLF9TVqhPNJA9thxBwqU7Q= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross , Jason Andryuk Subject: [MINI-OS PATCH v3 1/2] 9pfs: add fstat file operation hook Date: Tue, 25 Mar 2025 10:24:27 +0100 Message-ID: <20250325092428.23040-2-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250325092428.23040-1-jgross@suse.com> References: <20250325092428.23040-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Level: X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:email,suse.com:mid,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[] X-Spam-Score: -2.80 X-Spam-Flag: NO Add a file operations fstat hook to the 9pfs frontend. Signed-off-by: Juergen Gross Reviewed-by: Jason Andryuk Reviewed-by: Samuel Thibault --- V2: - or file access mode into st_mode (Jason Andryuk) V3: - set st_ctime, too (Samuel Thibault) --- 9pfront.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/9pfront.c b/9pfront.c index 1741d600..e676da35 100644 --- a/9pfront.c +++ b/9pfront.c @@ -85,6 +85,8 @@ struct file_9pfs { #define P9_QID_SIZE 13 +#define QID_TYPE_DIR 0x80 /* Applies to qid[0]. */ + struct p9_header { uint32_t size; uint8_t cmd; @@ -950,6 +952,33 @@ static int write_9pfs(struct file *file, const void *buf, size_t nbytes) return ret; } +static int fstat_9pfs(struct file *file, struct stat *buf) +{ + struct file_9pfs *f9pfs = file->filedata; + struct p9_stat stat; + int ret; + + ret = p9_stat(f9pfs->dev, f9pfs->fid, &stat); + if ( ret ) + { + errno = EIO; + return -1; + } + + buf->st_mode = (stat.qid[0] == QID_TYPE_DIR) ? S_IFDIR : S_IFREG; + buf->st_mode |= stat.mode & 0777; + buf->st_atime = stat.atime; + buf->st_mtime = stat.mtime; + buf->st_ctime = stat.mtime; /* Best available estimate. */ + buf->st_size = stat.length; + buf->st_uid = stat.n_uid; + buf->st_gid = stat.n_gid; + + free_stat(&stat); + + return 0; +} + static int close_9pfs(struct file *file) { struct file_9pfs *f9pfs = file->filedata; @@ -1296,6 +1325,7 @@ static const struct file_ops ops_9pfs = { .read = read_9pfs, .write = write_9pfs, .close = close_9pfs, + .fstat = fstat_9pfs, }; __attribute__((constructor)) -- 2.43.0 From minios-devel-bounces@lists.xenproject.org Tue Mar 25 09:24:48 2025 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 25 Mar 2025 09:24:48 +0000 Received: from list by lists.xenproject.org with outflank-mailman.926183.1329071 (Exim 4.92) (envelope-from ) id 1tx0Wd-0005lJ-WF; Tue, 25 Mar 2025 09:24:48 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 926183.1329071; 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Tue, 25 Mar 2025 09:24:43 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 50915137AC; Tue, 25 Mar 2025 09:24:43 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id /Bk7Elt24meHMwAAD6G6ig (envelope-from ); Tue, 25 Mar 2025 09:24:43 +0000 X-BeenThere: minios-devel@lists.xenproject.org List-Id: Mini-os development list List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: minios-devel-bounces@lists.xenproject.org Precedence: list Sender: "Minios-devel" X-Inumbo-ID: fc9ae202-095a-11f0-9ea3-5ba50f476ded DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742894683; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HmEfZe35xoFKsWhTqhezGsxyfw0BNdUzc5kZ9BZLcMM=; b=Y/ZnsIxMGqnt5F5Cp1fY8W2OV3jNnQ5EoigwZkACeHSCFm0jVVytoSI7dDGcrLL5rJPT/6 qMkToPoB1c2JcvVPW8bEoudLYna1u82IZb51cyKjathwPsAKXixnw2oprJczURwE6ZDSQP 9nKkIkV9gM6/MAYDqiG0ZfT3CeVx5yg= Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1742894683; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HmEfZe35xoFKsWhTqhezGsxyfw0BNdUzc5kZ9BZLcMM=; b=Y/ZnsIxMGqnt5F5Cp1fY8W2OV3jNnQ5EoigwZkACeHSCFm0jVVytoSI7dDGcrLL5rJPT/6 qMkToPoB1c2JcvVPW8bEoudLYna1u82IZb51cyKjathwPsAKXixnw2oprJczURwE6ZDSQP 9nKkIkV9gM6/MAYDqiG0ZfT3CeVx5yg= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross , Jason Andryuk Subject: [MINI-OS PATCH v3 2/2] 9pfs: add lseek file operation hook Date: Tue, 25 Mar 2025 10:24:28 +0100 Message-ID: <20250325092428.23040-3-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250325092428.23040-1-jgross@suse.com> References: <20250325092428.23040-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.80 X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:mid,suse.com:email,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO X-Spam-Level: Add a file operations lseek hook to the 9pfs frontend. Just use the lseek_default() implementation. Signed-off-by: Juergen Gross Reviewed-by: Jason Andryuk Reviewed-by: Samuel Thibault --- 9pfront.c | 1 + 1 file changed, 1 insertion(+) diff --git a/9pfront.c b/9pfront.c index e676da35..895426d1 100644 --- a/9pfront.c +++ b/9pfront.c @@ -1326,6 +1326,7 @@ static const struct file_ops ops_9pfs = { .write = write_9pfs, .close = close_9pfs, .fstat = fstat_9pfs, + .lseek = lseek_default, }; __attribute__((constructor)) -- 2.43.0