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qemu: Don't use asyncJob after stop during snapshot revert

Browse Source 
https://bugzilla.redhat.com/show_bug.cgi?id=1591628

Attempting to use the FORCE flag for snapshot-revert was resulting
in failures because qemuProcessStart and qemuProcessStartCPUs were
using QEMU_ASYNC_JOB_START after a qemuProcessStop resulting in an
error when entering the monitor:

error: internal error: unexpected async job 6 type expected 0

So create a local @jobType, initialize to QEMU_ASYNC_JOB_START, and
change to QEMU_ASYNC_JOB_NONE if we end up in the --force path
where the qemuProcessStop is run before a Start and StartCPUs.

Signed-off-by: John Ferlan <jferlan@redhat.com>
ACKed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
John Ferlan 2018-06-19 18:54:19 -04:00
parent e5d7064be0
commit 0c4408c832
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/qemu/qemu_driver.c
View File

@ -16037,6 +16037,7 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
qemuDomainSaveCookiePtr cookie;
virCPUDefPtr origCPU = NULL;
unsigned int start_flags = VIR_QEMU_PROCESS_START_GEN_VMID;
qemuDomainAsyncJob jobType = QEMU_ASYNC_JOB_START;
virCheckFlags(VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED |
@ -16212,6 +16213,9 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
VIR_DOMAIN_EVENT_STOPPED,
detail);
virObjectEventStateQueue(driver->domainEventState, event);
/* Start after stop won't be an async start job, so
* reset to none */
jobType = QEMU_ASYNC_JOB_NONE;
goto load;
}
}
@ -16270,7 +16274,7 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
rc = qemuProcessStart(snapshot->domain->conn, driver, vm,
cookie ? cookie->cpu : NULL,
QEMU_ASYNC_JOB_START, NULL, -1, NULL, snap,
jobType, NULL, -1, NULL, snap,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE,
start_flags);
virDomainAuditStart(vm, "from-snapshot", rc >= 0);
@ -16305,7 +16309,7 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
}
rc = qemuProcessStartCPUs(driver, vm,
VIR_DOMAIN_RUNNING_FROM_SNAPSHOT,
QEMU_ASYNC_JOB_START);
jobType);
if (rc < 0)
goto endjob;
virObjectUnref(event);