cpus: Let vm_stop[_force_state]() always flush block devices
Even if the VM is already stopped, we cannot assume that all data has
already been successfully flushed to disk. The flush during the previous
vm_stop() could have failed.
Run bdrv_flush_all() unconditionally so that we get an error each time
if the block device isn't really flushed.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/cpus.c b/cpus.c
index 8062cdd..2509eb5 100644
--- a/cpus.c
+++ b/cpus.c
@@ -443,11 +443,12 @@
pause_all_vcpus();
runstate_set(state);
vm_state_notify(0, state);
- bdrv_drain_all();
- ret = bdrv_flush_all();
monitor_protocol_event(QEVENT_STOP, NULL);
}
+ bdrv_drain_all();
+ ret = bdrv_flush_all();
+
return ret;
}
@@ -1126,7 +1127,9 @@
return vm_stop(state);
} else {
runstate_set(state);
- return 0;
+ /* Make sure to return an error if the flush in a previous vm_stop()
+ * failed. */
+ return bdrv_flush_all();
}
}