External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-07-30 13:37:17 +00:00
Code Issues Packages Projects Releases Wiki Activity

snapshot: support new undefine flags in qemu

Browse Source 
A nice benefit of deleting all snapshots at undefine time is that
you don't have to do any reparenting or subtree identification - since
everything goes, this is an O(n) process, whereas using multiple
virDomainSnapshotDelete calls would be O(n^2) or worse.  But it is
only doable for snapshot metadata, where we are in control of the
data being deleted; for the actual snapshots, there's too much
likelihood of something going wrong, and requiring even more API
calls to figure out what failed in the meantime, so callers are
better off deleting the snapshot data themselves one snapshot at
a time where they can deal with failures as they happen.

* src/qemu/qemu_driver.c (qemuDomainUndefineFlags): Honor new flags.
This commit is contained in:
Eric Blake 2011-08-12 10:20:24 -06:00
parent 3881a47088
commit 19f8c980ef
1 changed files with 19 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
src/qemu/qemu_driver.c
View File

@ -5073,7 +5073,8 @@ qemuDomainUndefineFlags(virDomainPtr dom,
int ret = -1;
int nsnapshots;
virCheckFlags(VIR_DOMAIN_UNDEFINE_MANAGED_SAVE, -1);
virCheckFlags(VIR_DOMAIN_UNDEFINE_MANAGED_SAVE |
VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA, -1);
qemuDriverLock(driver);
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
@ -5088,10 +5089,23 @@ qemuDomainUndefineFlags(virDomainPtr dom,
if (!virDomainObjIsActive(vm) &&
(nsnapshots = virDomainSnapshotObjListNum(&vm->snapshots, 0))) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
_("cannot delete inactive domain with %d snapshots"),
nsnapshots);
goto cleanup;
struct snap_remove rem;
if (flags & VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
_("cannot delete inactive domain with %d "
"snapshots"),
nsnapshots);
goto cleanup;
}
rem.driver = driver;
rem.vm = vm;
rem.metadata_only = true;
rem.err = 0;
virHashForEach(vm->snapshots.objs, qemuDomainSnapshotDiscardAll, &rem);
if (rem.err < 0)
goto cleanup;
}
if (!vm->persistent) {