[libvirt PATCH v3 23/32] qemu_snapshot: convert snapshot delete to async domain job

[Pavel Hrdina <phrdina@xxxxxxxxxx>]

Deleting external snapshots will require to run it as async domain job,
the same way as we do for snapshot creation.

For internal snapshots modify the job mask in order to forbid any other
job to be started.

Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
Reviewed-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 src/qemu/qemu_snapshot.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_snapshot.c b/src/qemu/qemu_snapshot.c
index 30137a2b8f..3fd348efd3 100644
--- a/src/qemu/qemu_snapshot.c
+++ b/src/qemu/qemu_snapshot.c
@@ -2359,10 +2359,15 @@ qemuSnapshotDiscard(virQEMUDriver *driver,
             if (qemuDomainSnapshotForEachQcow2(driver, def, snap, "-d", true) < 0)
                 return -1;
         } else {
-            qemuDomainObjEnterMonitor(vm);
+            /* Similarly as internal snapshot creation we would use a regular job
+             * here so set a mask to forbid any other job. */
+            qemuDomainObjSetAsyncJobMask(vm, VIR_JOB_NONE);
+            if (qemuDomainObjEnterMonitorAsync(vm, VIR_ASYNC_JOB_SNAPSHOT) < 0)
+                return -1;
             /* we continue on even in the face of error */
             qemuMonitorDeleteSnapshot(qemuDomainGetMonitor(vm), snap->def->name);
             qemuDomainObjExitMonitor(vm);
+            qemuDomainObjSetAsyncJobMask(vm, VIR_JOB_DEFAULT_MASK);
         }
     }
 
@@ -2563,8 +2568,11 @@ qemuSnapshotDelete(virDomainObj *vm,
                   VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY |
                   VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY, -1);
 
-    if (virDomainObjBeginJob(vm, VIR_JOB_MODIFY) < 0)
+    if (virDomainObjBeginAsyncJob(vm, VIR_ASYNC_JOB_SNAPSHOT,
+                                  VIR_DOMAIN_JOB_OPERATION_SNAPSHOT_DELETE,
+                                  flags) < 0) {
         return -1;
+    }
 
     if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
         goto endjob;
@@ -2583,7 +2591,7 @@ qemuSnapshotDelete(virDomainObj *vm,
     }
 
  endjob:
-    virDomainObjEndJob(vm);
+    virDomainObjEndAsyncJob(vm);
 
     return ret;
 }
-- 
2.39.0