Bug 980327

Summary:	[RFE] QCOW2v3 support for external snapshots
Product:	Red Hat Enterprise Linux 7	Reporter:	Ján Tomko <jtomko>
Component:	libvirt	Assignee:	Ján Tomko <jtomko>
Status:	CLOSED WONTFIX	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.0	CC:	cwei, dyuan, eblake, hhan, juzhang, mzhan, rbalakri, shyu, yanyang
Target Milestone:	rc	Keywords:	FutureFeature
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-01-15 14:58:48 UTC	Type:	Bug
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Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	827525
Bug Blocks:

Description Ján Tomko 2013-07-02 05:40:31 UTC

Support creating external snapshots with QCOW2v3 features.

Currently, libvirt creates inactive external snapshots by calling qemu-img, for active (live) external snapshots it uses the blockdev-snapshot-sync QMP command and lets QEMU create them.

For inactive snapshots, libvirt only needs to supply the requested features (and compat level) to qemu-img on the command line.

For active snapshots, libvirt will have to create the file and use 'mode': 'existing' parameter of blockdev-snapshot-sync.

https://www.redhat.com/archives/libvir-list/2013-June/msg00846.html
https://www.redhat.com/archives/libvir-list/2013-June/msg00867.html

Comment 4 Ján Tomko 2015-04-10 12:59:59 UTC

Upstream patches:
https://www.redhat.com/archives/libvir-list/2015-April/msg00392.html