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qcow/qcow2: implement bdrv_aio_flush 

Now that we do not have to flush the backing device anymore implementing
the bdrv_aio_flush method for image formats is trivial.

[hch: forward ported to qemu mainline from a product tree]

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Kevin Wolf 2010-01-12 13:49:43 +01:00 committed by Anthony Liguori
parent 3f5075ae63
commit f8012c135e
2 changed files with 18 additions and 0 deletions
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9
block/qcow.c
View File

@ -900,6 +900,14 @@ static void qcow_flush(BlockDriverState *bs)
bdrv_flush(s->hd);
}
static BlockDriverAIOCB *qcow_aio_flush(BlockDriverState *bs,
BlockDriverCompletionFunc *cb, void *opaque)
{
BDRVQcowState *s = bs->opaque;
return bdrv_aio_flush(s->hd, cb, opaque);
}
static int qcow_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVQcowState *s = bs->opaque;
@ -940,6 +948,7 @@ static BlockDriver bdrv_qcow = {
.bdrv_make_empty = qcow_make_empty,
.bdrv_aio_readv = qcow_aio_readv,
.bdrv_aio_writev = qcow_aio_writev,
.bdrv_aio_flush = qcow_aio_flush,
.bdrv_write_compressed = qcow_write_compressed,
.bdrv_get_info = qcow_get_info,

9
block/qcow2.c
View File

@ -1111,6 +1111,14 @@ static void qcow_flush(BlockDriverState *bs)
bdrv_flush(s->hd);
}
static BlockDriverAIOCB *qcow_aio_flush(BlockDriverState *bs,
BlockDriverCompletionFunc *cb, void *opaque)
{
BDRVQcowState *s = bs->opaque;
return bdrv_aio_flush(s->hd, cb, opaque);
}
static int64_t qcow_vm_state_offset(BDRVQcowState *s)
{
return (int64_t)s->l1_vm_state_index << (s->cluster_bits + s->l2_bits);
@ -1225,6 +1233,7 @@ static BlockDriver bdrv_qcow2 = {
.bdrv_aio_readv = qcow_aio_readv,
.bdrv_aio_writev = qcow_aio_writev,
.bdrv_aio_flush = qcow_aio_flush,
.bdrv_write_compressed = qcow_write_compressed,
.bdrv_snapshot_create = qcow2_snapshot_create,