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Description of problem:
Volume's allocation should be updated automatically while doing virsh vol-wipe
Version-Release number of selected component (if applicable):
kernel-3.10.0-322.x86_64.rpm
qemu-kvm-rhev-2.3.0-29.el7.x86_64
libvirt-daemon-1.2.17-13.el7.x86_64
How reproducible:
100%
Steps to Reproduce:
1. Create a vol,which format is raw:
#virsh vol-create-as --pool default --capacity 200M --allocation 100M --format raw test.img
2. Make sure the vol info is correct:
#virsh vol-info --pool default test.img
Name: test.img
Type: file
Capacity: 200.00 MiB
Allocation: 100.00 MiB
3. wipe the vol:
#virsh vol-wipe --pool default test.img
4. Check the size of file test.img
#du -h /var/lib/libvirt/images/test.img
0 /var/lib/libvirt/images/test.img
5. resize the vol:
#virsh vol-resize --pool default test.img --shrink 50M
error: Failed to change size of volume 'test.img' to 50M
error: invalid argument: can't shrink capacity below existing allocation
Actual results:
After step 5, 'virsh vol-resize --shrink' failed with error message:
" error: Failed to change size of volume 'test.img' to 50M
error: invalid argument: can't shrink capacity below existing allocation"
The error shows the volume's allocation is not updated automatically while doing 'virsh vol-wipe'.
Expected results:
After step5, 'virsh vol-resize --shrink' should be executed correctly.
Additional info:
Excute 'virsh vol-info --pool default test.img' before step 5,'virsh vol-resize --shrink' will be executed correctly.
Running a 'virsh vol-info' or 'virsh vol-list default --details' after the 'virsh vol-wipe' would 'reset' the internal view of the volume allocation.
In any case, I've generated a patch upstream in order to refresh the volume (if there is a refreshVol backend API) after the wipe volume is successful. See:
http://www.redhat.com/archives/libvir-list/2015-December/msg00085.html
Initial patch review resulted in generation of a v2:
http://www.redhat.com/archives/libvir-list/2015-December/msg00608.html
which included some doc adjustments. After a bit of back and forth - the doc adjustments were removed.
Patch has been pushed:
$ git describe 80ca86e54d101508ba6f3c5affc420d946810331
CVE-2015-5313-36-g80ca86e
$
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHSA-2016-2577.html
Description of problem: Volume's allocation should be updated automatically while doing virsh vol-wipe Version-Release number of selected component (if applicable): kernel-3.10.0-322.x86_64.rpm qemu-kvm-rhev-2.3.0-29.el7.x86_64 libvirt-daemon-1.2.17-13.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1. Create a vol,which format is raw: #virsh vol-create-as --pool default --capacity 200M --allocation 100M --format raw test.img 2. Make sure the vol info is correct: #virsh vol-info --pool default test.img Name: test.img Type: file Capacity: 200.00 MiB Allocation: 100.00 MiB 3. wipe the vol: #virsh vol-wipe --pool default test.img 4. Check the size of file test.img #du -h /var/lib/libvirt/images/test.img 0 /var/lib/libvirt/images/test.img 5. resize the vol: #virsh vol-resize --pool default test.img --shrink 50M error: Failed to change size of volume 'test.img' to 50M error: invalid argument: can't shrink capacity below existing allocation Actual results: After step 5, 'virsh vol-resize --shrink' failed with error message: " error: Failed to change size of volume 'test.img' to 50M error: invalid argument: can't shrink capacity below existing allocation" The error shows the volume's allocation is not updated automatically while doing 'virsh vol-wipe'. Expected results: After step5, 'virsh vol-resize --shrink' should be executed correctly. Additional info: Excute 'virsh vol-info --pool default test.img' before step 5,'virsh vol-resize --shrink' will be executed correctly.