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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>
This commit is contained in:
Kevin Wolf 2013-07-18 14:52:19 +02:00 committed by Stefan Hajnoczi
parent 323004a39d
commit 594a45ce64
1 changed files with 6 additions and 3 deletions
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cpus.c
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@ -443,11 +443,12 @@ static int do_vm_stop(RunState state)
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 @@ int vm_stop_force_state(RunState state)
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();
}
}