On Mon, Aug 15, 2011 at 05:33:13PM -0600, Eric Blake wrote:
When reverting a running domain to a paused snapshot, the event
that fires should mention that the domain is suspended.
* include/libvirt/libvirt.h.in
(VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT): New sub-event.
* src/qemu/qemu_driver.c (qemuDomainRevertToSnapshot): Use it.
---
include/libvirt/libvirt.h.in | 3 ++-
src/qemu/qemu_driver.c | 10 ++++++----
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index aa29fb6..a625479 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -2010,7 +2010,7 @@ typedef enum {
VIR_DOMAIN_EVENT_STARTED_BOOTED = 0, /* Normal startup from boot */
VIR_DOMAIN_EVENT_STARTED_MIGRATED = 1, /* Incoming migration from another host */
VIR_DOMAIN_EVENT_STARTED_RESTORED = 2, /* Restored from a state file */
- VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT = 3, /* Restored from snapshot */
+ VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT = 3, /* Restored from running snapshot */
} virDomainEventStartedDetailType;
/**
@@ -2023,6 +2023,7 @@ typedef enum {
VIR_DOMAIN_EVENT_SUSPENDED_MIGRATED = 1, /* Suspended for offline migration */
VIR_DOMAIN_EVENT_SUSPENDED_IOERROR = 2, /* Suspended due to a disk I/O error */
VIR_DOMAIN_EVENT_SUSPENDED_WATCHDOG = 3, /* Suspended due to a watchdog firing */
+ VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT = 4, /* Restored from paused snapshot */
} virDomainEventSuspendedDetailType;
/**
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 421a98e..78d99f4 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -8804,14 +8804,16 @@ static int qemuDomainRevertToSnapshot(virDomainSnapshotPtr
snapshot,
QEMU_ASYNC_JOB_NONE);
if (rc < 0)
goto endjob;
+ event = virDomainEventNewFromObj(vm,
+ VIR_DOMAIN_EVENT_SUSPENDED,
+ VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT);
} else {
virDomainObjSetState(vm, VIR_DOMAIN_RUNNING,
VIR_DOMAIN_RUNNING_FROM_SNAPSHOT);
+ event = virDomainEventNewFromObj(vm,
+ VIR_DOMAIN_EVENT_STARTED,
+ VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT);
}
-
- event = virDomainEventNewFromObj(vm,
- VIR_DOMAIN_EVENT_STARTED,
- VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT);
} else {
This isn't so nice. The lifecycle model for VMs is
shutoff <----> running <------>paused
This change creates a direct transition from shutoff to paused, missing
out the running state, which will break any apps which are just looking
to find out when guests stop/start and don't care about pause/resume.
Also
virsh start --paused $GUEST
will only emit a 'VIR_DOMAIN_EVENT_STARTED', so the current beahviour for
reverting to a paused snapshot matches that.
Arguably we could *also* emit an VIR_DOMAIN_EVENT_SUSPENDED, immediately
*after* the VIR_DOMAIN_EVENT_STARTED, in both cases though.
Daniel
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