qemu: Do not reset labels when migration fails

When stopping a domain on the destination host after a failed migration,
we need to avoid reseting security labels since the domain is still
running on the source host. While we were correctly doing so in some
cases, there were still some paths which did this wrong.

https://bugzilla.redhat.com/show_bug.cgi?id=1242904Signed-off-by: NJiri Denemark <jdenemar@redhat.com>

src/qemu/qemu_driver.c

@@ -2187,6 +2187,7 @@ qemuDomainDestroyFlags(virDomainPtr dom,
     int ret = -1;
     virObjectEventPtr event = NULL;
     qemuDomainObjPrivatePtr priv;
+    unsigned int stopFlags = 0;
 
     virCheckFlags(VIR_DOMAIN_DESTROY_GRACEFUL, -1);
 
@@ -2200,6 +2201,8 @@ qemuDomainDestroyFlags(virDomainPtr dom,
 
     qemuDomainSetFakeReboot(driver, vm, false);
 
+    if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN)
+        stopFlags |= VIR_QEMU_PROCESS_STOP_MIGRATED;
 
     /* We need to prevent monitor EOF callback from doing our work (and sending
      * misleading events) while the vm is unlocked inside BeginJob/ProcessKill API
@@ -2234,7 +2237,7 @@ qemuDomainDestroyFlags(virDomainPtr dom,
         goto endjob;
     }
 
-    qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_DESTROYED, 0);
+    qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_DESTROYED, stopFlags);
     event = virDomainEventLifecycleNewFromObj(vm,
                                      VIR_DOMAIN_EVENT_STOPPED,
                                      VIR_DOMAIN_EVENT_STOPPED_DESTROYED);

src/qemu/qemu_migration.c

@@ -3474,7 +3474,8 @@ qemuMigrationPrepareAny(virQEMUDriverPtr driver,
 
  stop:
     virDomainAuditStart(vm, "migrated", false);
-    qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FAILED, 0);
+    qemuProcessStop(driver, vm, VIR_DOMAIN_SHUTOFF_FAILED,
+                    VIR_QEMU_PROCESS_STOP_MIGRATED);
 
  endjob:
     qemuMigrationJobFinish(driver, vm);

src/qemu/qemu_process.c

@@ -285,6 +285,7 @@ qemuProcessHandleMonitorEOF(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
     int eventReason = VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN;
     int stopReason = VIR_DOMAIN_SHUTOFF_SHUTDOWN;
     const char *auditReason = "shutdown";
+    unsigned int stopFlags = 0;
 
     VIR_DEBUG("Received EOF on %p '%s'", vm, vm->def->name);
 
@@ -310,14 +311,16 @@ qemuProcessHandleMonitorEOF(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
         auditReason = "failed";
     }
 
-    if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN)
+    if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN) {
+        stopFlags |= VIR_QEMU_PROCESS_STOP_MIGRATED;
         qemuMigrationErrorSave(driver, vm->def->name,
                                qemuMonitorLastError(priv->mon));
+    }
 
     event = virDomainEventLifecycleNewFromObj(vm,
                                      VIR_DOMAIN_EVENT_STOPPED,
                                      eventReason);
-    qemuProcessStop(driver, vm, stopReason, 0);
+    qemuProcessStop(driver, vm, stopReason, stopFlags);
     virDomainAuditStop(vm, auditReason);
 
     if (!vm->persistent) {
@@ -3732,10 +3735,13 @@ qemuProcessReconnect(void *opaque)
     virQEMUDriverConfigPtr cfg;
     size_t i;
     int ret;
+    unsigned int stopFlags = 0;
 
     VIR_FREE(data);
 
     qemuDomainObjRestoreJob(obj, &oldjob);
+    if (oldjob.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN)
+        stopFlags |= VIR_QEMU_PROCESS_STOP_MIGRATED;
 
     cfg = virQEMUDriverGetConfig(driver);
     priv = obj->privateData;
@@ -3916,7 +3922,7 @@ qemuProcessReconnect(void *opaque)
              * really is and FAILED means "failed to start" */
             state = VIR_DOMAIN_SHUTOFF_UNKNOWN;
         }
-        qemuProcessStop(driver, obj, state, 0);
+        qemuProcessStop(driver, obj, state, stopFlags);
     }
 
     if (!obj->persistent)
@@ -5693,9 +5699,13 @@ qemuProcessAutoDestroy(virDomainObjPtr dom,
     virQEMUDriverPtr driver = opaque;
     qemuDomainObjPrivatePtr priv = dom->privateData;
     virObjectEventPtr event = NULL;
+    unsigned int stopFlags = 0;
 
     VIR_DEBUG("vm=%s, conn=%p", dom->def->name, conn);
 
+    if (priv->job.asyncJob == QEMU_ASYNC_JOB_MIGRATION_IN)
+        stopFlags |= VIR_QEMU_PROCESS_STOP_MIGRATED;
+
     if (priv->job.asyncJob) {
         VIR_DEBUG("vm=%s has long-term job active, cancelling",
                   dom->def->name);
@@ -5708,8 +5718,7 @@ qemuProcessAutoDestroy(virDomainObjPtr dom,
 
     VIR_DEBUG("Killing domain");
 
-    qemuProcessStop(driver, dom, VIR_DOMAIN_SHUTOFF_DESTROYED,
-                    VIR_QEMU_PROCESS_STOP_MIGRATED);
+    qemuProcessStop(driver, dom, VIR_DOMAIN_SHUTOFF_DESTROYED, stopFlags);
 
     virDomainAuditStop(dom, "destroyed");
     event = virDomainEventLifecycleNewFromObj(dom,