On Thu, Jan 11, 2018 at 13:41:39 -0600, Scott Garfinkle wrote:
> On Mon, 2017-10-30 at 14:21 +0530, Kothapally Madhu Pavan wrote:
> > Restoring to a snapshot should not overwrite the persistent XML
> > configuration
> > of a snapshot as a side effect. This patchset fixes the same.
> > Currently,
> > virDomainSnapshotDef only saves active domain definition of the
> > guest.
> > And on restore the active domain definition is used as both active
> > and
> > inactive domain definitions. This will make the non-persistent
> > changes
> > persistent in snapshot image. This patchset allows to save inactive
> > domain
> > definition as well and on snapshot-revert non-persistent
> > configuration is
> > restored as is.
> >
> > Currently, snapshot-revert is making non-presistent changes as
> > persistent.
> > Here are the steps to reproduce.
> > Step1: virsh define $dom
> > Step2: virsh attach-device $dom $memory-device.xml --live
> > Step3: virsh snapshot-create $dom
> > Step4: virsh destroy $dom
> > Step5: virsh snapshot-revert $dom $snapshot-name
> > Step6: virsh destroy $dom
> > Step7: virsh start $dom
> > Here we still have $memory-device attached in Step2.
> >
> > This patchset is attempting to solve this issue. This patchset will
> > also
> > allow user to dump and edit inactive XML configuration of a snapshot.
> > Dumping inactive domain definition of a snapshot is important as
> > --redefine uses snapshot-dumpxml output to redefine a snapshot.
> >
> > Kothapally Madhu Pavan (7):
> > qemu: Store inactive domain configuration in snapshot
> > qemu: Use active and inactive snapshot configuration on restore
> > conf: Allow editing inactive snapshot configuration
> > virsh: Dump inactive XML configuration of snapshot using
> > snapshot-dumpxml
> > virsh: Edit inactive XML configuration of snapshot using snapshot-
> > edit
> > virsh: Allow restoring snapshot with non-persistent configuration
> > tests: docs: Add schema and testcase for domainsnapshot
> >
> > docs/schemas/domainsnapshot.rng| 19 +
> > include/libvirt/libvirt-domain-snapshot.h | 10 ++-
> > include/libvirt/libvirt-domain.h | 1 +
> > src/conf/domain_conf.c | 6 +-
> > src/conf/domain_conf.h | 2 +
> > src/conf/snapshot_conf.c | 48
> > -
> > src/conf/snapshot_conf.h | 1 +
> > src/qemu/qemu_driver.c | 33 -
> > .../full_domain_withinactive.xml | 83
> > ++
> > tests/domainsnapshotxml2xmltest.c | 1 +
> > tools/virsh-snapshot.c | 20 ++
> > tools/virsh.pod| 37 +-
> > 12 files changed, 251 insertions(+), 10 deletions(-)
> > create mode 100644
> > tests/domainsnapshotxml2xmlout/full_domain_withinactive.xml
>
> Could someone please review the patch set? Jiri mentioned in early
> December that it was on his list; perhaps this fell through the cracks
> or got displaced by the (admittedly more urgent) Spectre/Meltdown
Yeah, more urgent stuff appeared at that time. However, John replied
with several comments and the author didn't address any of them by
either sending a v2 or replying to John's emails or (preferably) both.
Jirka
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