qemu: Update tray status while tray moved event is emitted

With this patch, libvirt won't start the guest with the medium
source which already ejected by guest when doing migration, or
saving/restoring.

src/qemu/qemu_process.c

@@ -1038,6 +1038,16 @@ qemuProcessHandleTrayChange(qemuMonitorPtr mon ATTRIBUTE_UNUSED,
         event = virDomainEventTrayChangeNewFromObj(vm,
                                                    devAlias,
                                                    reason);
+        /* Update disk tray status */
+        if (reason == VIR_DOMAIN_EVENT_TRAY_CHANGE_OPEN)
+            disk->tray_status = VIR_DOMAIN_DISK_TRAY_OPEN;
+        else if (reason == VIR_DOMAIN_EVENT_TRAY_CHANGE_CLOSE)
+            disk->tray_status = VIR_DOMAIN_DISK_TRAY_CLOSED;
+
+        if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0) {
+            VIR_WARN("Unable to save status on vm %s after tray moved event",
+                     vm->def->name);
+        }
     }
 
     virDomainObjUnlock(vm);