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_int.h | |
| parent | c68b89acd636ff545bc7cb92739c41999291ce3c (diff) | |
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_int.h')
| -rw-r--r-- | block_int.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/block_int.h b/block_int.h index 5aadc1fcee..1ec4921cc6 100644 --- a/block_int.h +++ b/block_int.h @@ -93,6 +93,13 @@ struct BlockDriver { */ int coroutine_fn (*bdrv_co_flush_to_disk)(BlockDriverState *bs); + /* + * Flushes all internal caches to the OS. The data may still sit in a + * writeback cache of the host OS, but it will survive a crash of the qemu + * process. + */ + int coroutine_fn (*bdrv_co_flush_to_os)(BlockDriverState *bs); + int (*bdrv_aio_multiwrite)(BlockDriverState *bs, BlockRequest *reqs, int num_reqs); int (*bdrv_merge_requests)(BlockDriverState *bs, BlockRequest* a, |