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Bug 956506

Summary:	virsh snapshot-delete --children-only bypasses safety check for deleting disk-only children
Product:	Red Hat Enterprise Linux 7	Reporter:	tingting zheng <tzheng>
Component:	libvirt	Assignee:	Eric Blake <eblake>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.0	CC:	cwei, dyuan, eblake, honzhang, jsuchane, mzhan, rbalakri, shyu
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	libvirt-1.2.8-6.el7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	903052
Clones:	1134674 (view as bug list)		Environment:
Last Closed:	2015-03-05 07:20:19 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	903052
Bug Blocks:	1113520, 1134674

Comment 2 Eric Blake 2013-06-06 02:58:31 UTC

Still needs fixing upstream, but should be relatively easy to reproduce and thus locate the bug.

Comment 4 Eric Blake 2013-07-10 20:59:37 UTC

Right now, libvirt documents that it refuses to delete external snapshots only because it is not implemented safely; this bug represents a hole where we aren't following the documentation.  Alternatives are to patch code to match docs (quick), or to actually implement snapshot deletion (longer, but more desirable).  I see no need to do a quick patch now only to undo it later when true snapshot deletion is implemented.

Comment 6 Eric Blake 2014-10-27 11:45:17 UTC

Upstream proposed patch:
https://www.redhat.com/archives/libvir-list/2014-October/msg00823.html

Comment 7 Eric Blake 2014-10-28 14:21:39 UTC

In POST:
http://post-office.corp.redhat.com/archives/rhvirt-patches/2014-October/msg00747.html

Comment 9 Shanzhi Yu 2014-11-14 09:19:42 UTC

Change to VERIFIED status. Steps as below:

# virsh snapshot-create-as rh7 internal
Domain snapshot internal created
# virsh snapshot-create-as rh7 external --disk-only
Domain snapshot external created
# virsh snapshot-delete rh7 internal --children
error: Failed to delete snapshot internal
error: unsupported configuration: deletion of 1 external disk snapshots not supported yet
# virsh snapshot-delete rh7 internal --children-only 
error: Failed to delete snapshot internal
error: unsupported configuration: deletion of 1 external disk snapshots not supported yet

Comment 11 errata-xmlrpc 2015-03-05 07:20:19 UTC

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-2015-0323.html