diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2011-11-10 18:10:11 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2011-11-11 14:02:59 +0100 |
| commit | eb489bb1eceea0d710cd5f5122d37213300ceef6 (patch) | |
| tree | a4f6ea0374bdd83c83ebe7391c56211c7190ed71 /block | |
| parent | c68b89acd636ff545bc7cb92739c41999291ce3c (diff) | |
| download | qemu-eb489bb1eceea0d710cd5f5122d37213300ceef6.tar.gz | |
block: Introduce bdrv_co_flush_to_os
qcow2 has a writeback metadata cache, so flushing a qcow2 image actually
consists of writing back that cache to the protocol and only then flushes the
protocol in order to get everything stable on disk.
This introduces a separate bdrv_co_flush_to_os to reflect the split.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index f7f73fe376..5c784eee51 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -1105,7 +1105,7 @@ fail: return ret; } -static int qcow2_co_flush(BlockDriverState *bs) +static int qcow2_co_flush_to_os(BlockDriverState *bs) { BDRVQcowState *s = bs->opaque; int ret; @@ -1124,6 +1124,11 @@ static int qcow2_co_flush(BlockDriverState *bs) } qemu_co_mutex_unlock(&s->lock); + return 0; +} + +static int qcow2_co_flush_to_disk(BlockDriverState *bs) +{ return bdrv_co_flush(bs->file); } @@ -1245,7 +1250,8 @@ static BlockDriver bdrv_qcow2 = { .bdrv_co_readv = qcow2_co_readv, .bdrv_co_writev = qcow2_co_writev, - .bdrv_co_flush_to_disk = qcow2_co_flush, + .bdrv_co_flush_to_os = qcow2_co_flush_to_os, + .bdrv_co_flush_to_disk = qcow2_co_flush_to_disk, .bdrv_co_discard = qcow2_co_discard, .bdrv_truncate = qcow2_truncate, |