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qemu: snapshot: Forbid partial internal snapshots

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qemu's savevm command does a snapshot of all non readonly disks of a VM.
Libvirt though allowed disabling snapshot for certain disk of a VM.
This commit is contained in:
Peter Krempa 2014-05-20 14:04:23 +02:00
parent 68c15a4f8b
commit 03b4da131a
1 changed files with 10 additions and 5 deletions
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15
src/qemu/qemu_driver.c
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@ -12621,6 +12621,7 @@ qemuDomainSnapshotPrepare(virConnectPtr conn,
bool reuse = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT) != 0; bool reuse = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT) != 0;
bool atomic = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC) != 0; bool atomic = (*flags & VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC) != 0;
bool found_internal = false; bool found_internal = false;
bool forbid_internal = false;
int external = 0; int external = 0;
qemuDomainObjPrivatePtr priv = vm->privateData; qemuDomainObjPrivatePtr priv = vm->privateData;
@ -12689,6 +12690,9 @@ qemuDomainSnapshotPrepare(virConnectPtr conn,
break; break;
case VIR_DOMAIN_SNAPSHOT_LOCATION_NONE: case VIR_DOMAIN_SNAPSHOT_LOCATION_NONE:
/* Remember seeing a disk that has snapshot disabled */
if (!dom_disk->readonly)
forbid_internal = true;
break; break;
case VIR_DOMAIN_SNAPSHOT_LOCATION_DEFAULT: case VIR_DOMAIN_SNAPSHOT_LOCATION_DEFAULT:
@ -12699,12 +12703,13 @@ qemuDomainSnapshotPrepare(virConnectPtr conn,
} }
} }
/* internal snapshot requires a disk image to store the memory image to */ /* internal snapshot requires a disk image to store the memory image to, and
if (def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL && * also disks can't be excluded from an internal snapshot*/
!found_internal) { if ((def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL && !found_internal) ||
(found_internal && forbid_internal)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("internal checkpoints require at least " _("internal snapshots and checkpoints require all "
"one disk to be selected for snapshot")); "disks to be selected for snapshot"));
goto cleanup; goto cleanup;
} }