diff options
| author | Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> | 2016-03-14 10:44:53 +0300 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-03-30 12:12:15 +0200 |
| commit | c32b82afaf261ebb922269e2be298e05331b875c (patch) | |
| tree | f5d79b9fa15f7919b2361284fd42d3d83e3f7b94 /include | |
| parent | 6278ae035fbd4bbab6a43cd53e4bf3bb71debc71 (diff) | |
| download | qemu-c32b82afaf261ebb922269e2be298e05331b875c.tar.gz | |
block: add flush callback
This patch adds callback for flush request. This callback is responsible
for flushing whole block devices stack. bdrv_flush function does not
proceed to underlying devices. It should be performed by this callback
function, if needed.
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/block_int.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index a33b0de40b..1177c25aab 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -176,6 +176,13 @@ struct BlockDriver { int (*bdrv_inactivate)(BlockDriverState *bs); /* + * Flushes all data for all layers by calling bdrv_co_flush for underlying + * layers, if needed. This function is needed for deterministic + * synchronization of the flush finishing callback. + */ + int coroutine_fn (*bdrv_co_flush)(BlockDriverState *bs); + + /* * Flushes all data that was already written to the OS all the way down to * the disk (for example raw-posix calls fsync()). */ |