Re: Regression with 79f11b35

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FWIW this is still an issue with current libvirt git, but I haven't dug into
it any further.

- Cole

On 05/03/2014 04:54 PM, Cole Robinson wrote:
> I'm seeing a regression with:
> 
> commit 79f11b35c77b3c286c84312dc9737c2ccbf67ed5
> Author: Eric Blake <eblake@xxxxxxxxxx>
> Date:   Tue Apr 8 14:26:02 2014 -0600
> 
>     conf: track user vs. canonical name through full chain lookup
> 
> 
> Setup info:
> 
> $ ls -ld /mnt/data
> lrwxrwxrwx. 1 root root 17 Oct 24  2011 /mnt/data -> terabytedrv/data/
> $ ls -l /mnt/data/devel/images/f18*
> -rw-r--r--. 1 qemu qemu 9316335616 Mar 30 18:36
> /mnt/data/devel/images/f18-backing-img.qcow2
> -rw-r--r--. 1 root root 6848249856 Apr 25 19:11 /mnt/data/devel/images/f18.qcow2
> 
> $ qemu-img info /mnt/data/devel/images/f18-backing-img.qcow2
> image: /mnt/data/devel/images/f18-backing-img.qcow2
> file format: qcow2
> virtual size: 9.8G (10485760000 bytes)
> disk size: 8.7G
> cluster_size: 65536
> Snapshot list:
> ID        TAG                 VM SIZE                DATE       VM CLOCK
> 1         snapshot1                 0 2014-01-13 18:48:43   00:00:00.000
> 2         snapshot2                 0 2014-01-13 18:49:39   00:00:00.000
> Format specific information:
>     compat: 0.10
> 
> $ qemu-img info /mnt/data/devel/images/f18.qcow2 image:
> /mnt/data/devel/images/f18.qcow2
> file format: qcow2
> virtual size: 9.8G (10485760000 bytes)
> disk size: 6.4G
> cluster_size: 65536
> backing file: f18-backing-img.qcow2 (actual path:
> /mnt/data/devel/images/f18-backing-img.qcow2)
> Format specific information:
>     compat: 0.10
> 
> 
> Before the patch:
> 
> $ sudo virsh vol-dumpxml /mnt/data/devel/images/f18.qcow2
> [full xml with backing image info]
> 
> After the patch:
> 
> $ sudo virsh vol-dumpxml /mnt/data/devel/images/f18.qcow2
> [xml minus xml for the backing image]
> 
> And these errors are on the console when the daemon starts:
> 
> 2014-05-03 20:52:34.970+0000: 20600: error : virFindBackingFile:590 : Cannot
> access backing file './f18-backing-img.qcow2': No such file or directory
> 2014-05-03 20:52:34.970+0000: 20600: warning :
> virStorageFileGetMetadataInternal:868 : Backing file 'f18-backing-img.qcow2'
> of image '/mnt/data/devel/images/ztester-serial-f18.qcow2' is missing.
> 
> On git head actually the vol-dumpxml explicitly fails, but I don't have the
> error handy.
> 

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