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author | Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> | 2016-03-14 10:44:53 +0300 |
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committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 20:01:34 -0600 |
commit | 2bd491008bc1d7f2747771f5a6d4ac3626d2e58f (patch) | |
tree | 15bc291cded207b4e1c2c23bbba2d55c524de465 /block/io.c | |
parent | 457609963aba6df0cc0dbe0dea4d06bed5f13a8a (diff) | |
download | hqemu-2bd491008bc1d7f2747771f5a6d4ac3626d2e58f.zip hqemu-2bd491008bc1d7f2747771f5a6d4ac3626d2e58f.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 'block/io.c')
-rw-r--r-- | block/io.c | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -2333,6 +2333,13 @@ int coroutine_fn bdrv_co_flush(BlockDriverState *bs) } tracked_request_begin(&req, bs, 0, 0, BDRV_TRACKED_FLUSH); + + /* Write back all layers by calling one driver function */ + if (bs->drv->bdrv_co_flush) { + ret = bs->drv->bdrv_co_flush(bs); + goto out; + } + /* Write back cached data to the OS even with cache=unsafe */ BLKDBG_EVENT(bs->file, BLKDBG_FLUSH_TO_OS); if (bs->drv->bdrv_co_flush_to_os) { |