[libvirt] Regression with 79f11b35

Cole Robinson crobinso at redhat.com
Sat May 3 20:54:36 UTC 2014


I'm seeing a regression with:

commit 79f11b35c77b3c286c84312dc9737c2ccbf67ed5
Author: Eric Blake <eblake at redhat.com>
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.

- Cole




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