virtio-blk: Generate BLOCK_IO_ERROR QMP event

Just call bdrv_mon_event() in the right place.
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/virtio-blk.c

@@ -105,16 +105,20 @@ static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error,
         drive_get_on_error(req->dev->bs, is_read);
     VirtIOBlock *s = req->dev;
 
-    if (action == BLOCK_ERR_IGNORE)
+    if (action == BLOCK_ERR_IGNORE) {
+        bdrv_mon_event(req->dev->bs, BDRV_ACTION_IGNORE, is_read);
         return 0;
+    }
 
     if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
             || action == BLOCK_ERR_STOP_ANY) {
         req->next = s->rq;
         s->rq = req;
         vm_stop(0);
+        bdrv_mon_event(req->dev->bs, BDRV_ACTION_STOP, is_read);
     } else {
         virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR);
+        bdrv_mon_event(req->dev->bs, BDRV_ACTION_REPORT, is_read);
     }
 
     return 1;