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block: Track flush requests 

Both bdrv_flush and bdrv_aio_flush eventually call bdrv_co_flush, add
tracked_request_begin and tracked_request_end pair in that function so
that all flush requests are now tracked.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1447064214-29930-3-git-send-email-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2015-11-09 18:16:47 +08:00 committed by Kevin Wolf
parent ebde595ce6
commit cdb5e3155e
1 changed files with 8 additions and 3 deletions
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11
block/io.c
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@ -2318,18 +2318,20 @@ static void coroutine_fn bdrv_flush_co_entry(void *opaque)
int coroutine_fn bdrv_co_flush(BlockDriverState *bs) int coroutine_fn bdrv_co_flush(BlockDriverState *bs)
{ {
int ret; int ret;
BdrvTrackedRequest req;
if (!bs || !bdrv_is_inserted(bs) || bdrv_is_read_only(bs) || if (!bs || !bdrv_is_inserted(bs) || bdrv_is_read_only(bs) ||
bdrv_is_sg(bs)) { bdrv_is_sg(bs)) {
return 0; return 0;
} }
tracked_request_begin(&req, bs, 0, 0, BDRV_TRACKED_FLUSH);
/* Write back cached data to the OS even with cache=unsafe */ /* Write back cached data to the OS even with cache=unsafe */
BLKDBG_EVENT(bs->file, BLKDBG_FLUSH_TO_OS); BLKDBG_EVENT(bs->file, BLKDBG_FLUSH_TO_OS);
if (bs->drv->bdrv_co_flush_to_os) { if (bs->drv->bdrv_co_flush_to_os) {
ret = bs->drv->bdrv_co_flush_to_os(bs); ret = bs->drv->bdrv_co_flush_to_os(bs);
if (ret < 0) { if (ret < 0) {
return ret; goto out;
} }
} }
@ -2369,14 +2371,17 @@ int coroutine_fn bdrv_co_flush(BlockDriverState *bs)
ret = 0; ret = 0;
} }
if (ret < 0) { if (ret < 0) {
return ret; goto out;
} }
/* Now flush the underlying protocol. It will also have BDRV_O_NO_FLUSH /* Now flush the underlying protocol. It will also have BDRV_O_NO_FLUSH
* in the case of cache=unsafe, so there are no useless flushes. * in the case of cache=unsafe, so there are no useless flushes.
*/ */
flush_parent: flush_parent:
return bs->file ? bdrv_co_flush(bs->file->bs) : 0; ret = bs->file ? bdrv_co_flush(bs->file->bs) : 0;
out:
tracked_request_end(&req);
return ret;
} }
int bdrv_flush(BlockDriverState *bs) int bdrv_flush(BlockDriverState *bs)