Re: [Xen-users] Fwd: xc_dom_kernel_file failed: No such file or directory

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Mon, Apr 21, 2014 at 05:48:00PM -0300, Facu Curti wrote:
> On Mon, Apr 21, 2014 at 10:26:13AM +0100, Wei Liu wrote:
> > On Fri, Apr 18, 2014 at 06:37:25PM -0300, Facu Curti wrote:
> > > On Fri, Apr 18, 2014 at 06:01:40PM +0100, Ian Campbell wrote:
> > > > On Fri, 2014-04-18 at 13:55 -0300, Facu Curti wrote:
> > > > 
> > > > > I tried to give mode +x to /usr/lib/xen/bin/qemu-dm, but it doesn't
> > > > > exist. Maybe I have a missed package?
> > > > 
> > > > You haven't given any details about your dom0 distro, how you installed
> > > > Xen, nor what version of Xen you are running, so it is very hard to give
> > > > any advice.
> > > > 
> > > > Ian.
> > > 
> > > Solved! :). You was rigth. I'm using gentoo:
> > > 
> > > uname -a:
> > > Linux facGentoo 3.12.13-gentoo #21 SMP PREEMPT Tue Apr 15 08:57:05 ART 
> > > 2014 x86_64 Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz GenuineIntel GNU/Linux
> > > 
> > > I had emerged xen-tools without qemu flag. Before:
> > > 
> > > emerge -pva xen-tools:
> > > 
> > > [ebuild   R    ] app-emulation/xen-tools-4.3.1-r5  USE="pam -qemu -api 
> > > -custom-cflags -debug -doc -flask -hvm (-ocaml) -pygrub -python -screen 
> > > -static-libs -xend" PYTHON_SINGLE_TARGET="python2_7 -python2_6" 
> > > PYTHON_TARGETS="python2_7 -python2_6" 21,972 kB 
> > > 
> > > Now:
> > > 
> > > [ebuild   R    ] app-emulation/xen-tools-4.3.1-r5  USE="pam qemu -api 
> > > -custom-cflags -debug -doc -flask -hvm (-ocaml) -pygrub -python -screen 
> > > -static-libs -xend" PYTHON_SINGLE_TARGET="python2_7 -python2_6" 
> > > PYTHON_TARGETS="python2_7 -python2_6" 21,972 kB 
> > > 
> > > So, it is solved. But now I have another problem ._. This will end
> > > sometime? lol.
> > > 
> > > libxl: error: libxl_device.c:894:device_backend_callback: unable to add 
> > > device with path /local/domain/0/backend/vif/11/0
> > > libxl: error: libxl_create.c:1115:domcreate_attach_vtpms: unable to add 
> > > nic devices
> > > libxl: error: libxl_device.c:894:device_backend_callback: unable to 
> > > remove device with path /local/domain/0/backend/vif/11/0
> > > libxl: error: libxl.c:1452:devices_destroy_cb: libxl__devices_destroy 
> > > failed for 11
> > > 
> > 
> > Looks like you don't have a backend driver for Xen virtual network
> > interface.
> > 
> > Do you have a module called xen_netback loaded in Dom0? Or can you check
> > it is compiled in the kernel?
> > 
> > Wei.
> 
> I dont have this option :/ I just have XEN_NETDEV_FRONTEND and
> XEN_NETDEV_BACKEND. Both compiled in kernel. I attach my .config
> 

OK, XEN_NETDEV_BACKEND=y in your config file so you've had netback
compiled in.

I can see from your config file you're using bridge network. It might
be worth checking if br0 exists and userspace vif-bridge script runs
correctly.  You can find some reference Dom0 network setup on
wiki.xen.org.

Wei.

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