3:51 a.m.
By default, active and inactive XMl snapshot configurations are
assigned to domain definition. This will make sure that all the
non-persistent configurations of the snapshot are restored back
as it is. This patch will also make sure that user has a choice
to choose of using active XML configuration of snapshot as both
active and inactive XML configurations of the restoring domain.
Signed-off-by: Kothapally Madhu Pavan <kmp(a)linux.vnet.ibm.com>
---
include/libvirt/libvirt-domain-snapshot.h | 10 +++++++---
src/qemu/qemu_driver.c | 20 +++++++++++++++++++-
2 files changed, 26 insertions(+), 4 deletions(-)
diff --git a/include/libvirt/libvirt-domain-snapshot.h
b/include/libvirt/libvirt-domain-snapshot.h
index 0f73f24..67ccb59 100644
--- a/include/libvirt/libvirt-domain-snapshot.h
+++ b/include/libvirt/libvirt-domain-snapshot.h
@@ -184,9 +184,13 @@ int virDomainSnapshotHasMetadata(virDomainSnapshotPtr snapshot,
unsigned int flags);
typedef enum {
- VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING = 1 << 0, /* Run after revert */
- VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED = 1 << 1, /* Pause after revert */
- VIR_DOMAIN_SNAPSHOT_REVERT_FORCE = 1 << 2, /* Allow risky reverts */
+ VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING = 1 << 0, /* Run after revert */
+ VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED = 1 << 1, /* Pause after revert */
+ VIR_DOMAIN_SNAPSHOT_REVERT_FORCE = 1 << 2, /* Allow risky reverts */
+ VIR_DOMAIN_SNAPSHOT_REVERT_ACTIVE_ONLY = 1 << 3, /* Use active snapshot
+ configurations as both
+ active and inactive
+ domain configurations*/
} virDomainSnapshotRevertFlags;
/* Revert the domain to a point-in-time snapshot. The
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 4ffec70..aecfcff 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -15577,6 +15577,7 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
qemuDomainObjPrivatePtr priv;
int rc;
virDomainDefPtr config = NULL;
+ virDomainDefPtr newConfig = NULL;
virQEMUDriverConfigPtr cfg = NULL;
virCapsPtr caps = NULL;
bool was_running = false;
@@ -15586,7 +15587,8 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
virCheckFlags(VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED |
- VIR_DOMAIN_SNAPSHOT_REVERT_FORCE, -1);
+ VIR_DOMAIN_SNAPSHOT_REVERT_FORCE |
+ VIR_DOMAIN_SNAPSHOT_REVERT_ACTIVE_ONLY, -1);
/* We have the following transitions, which create the following events:
* 1. inactive -> inactive: none
@@ -15688,6 +15690,16 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
goto endjob;
}
+ /* Prepare to copy snapshot inactive xml as inactive configuration
+ * of this domain unless user exclusively specify not to copy it */
+ if (!(flags & VIR_DOMAIN_SNAPSHOT_REVERT_ACTIVE_ONLY) &&
+ snap->def->newDom) {
+ newConfig = virDomainDefCopy(snap->def->newDom, caps,
+ driver->xmlopt, NULL, true);
+ if (!newConfig)
+ goto endjob;
+ }
+
cookie = (qemuDomainSaveCookiePtr) snap->def->cookie;
switch ((virDomainState) snap->def->state) {
@@ -15785,12 +15797,16 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
virCPUDefFree(priv->origCPU);
VIR_STEAL_PTR(priv->origCPU, origCPU);
}
+ if (newConfig)
+ vm->newDef = newConfig;
} else {
/* Transitions 2, 3 */
load:
was_stopped = true;
if (config)
virDomainObjAssignDef(vm, config, false, NULL);
+ if (newConfig)
+ vm->newDef = newConfig;
/* No cookie means libvirt which saved the domain was too old to
* mess up the CPU definitions.
@@ -15884,6 +15900,8 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
}
if (config)
virDomainObjAssignDef(vm, config, false, NULL);
+ if (newConfig)
+ vm->newDef = newConfig;
if (flags & (VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED)) {
--
1.8.3.1