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block-backend: Expose bdrv_write_zeroes()

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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2015-03-19 13:33:31 +01:00
parent a0710f7995
commit 0df89e8e6f
2 changed files with 13 additions and 0 deletions
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11
block/block-backend.c
View file

@ -515,6 +515,17 @@ int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf,
return bdrv_write(blk->bs, sector_num, buf, nb_sectors);
}
int blk_write_zeroes(BlockBackend *blk, int64_t sector_num,
int nb_sectors, BdrvRequestFlags flags)
{
int ret = blk_check_request(blk, sector_num, nb_sectors);
if (ret < 0) {
return ret;
}
return bdrv_write_zeroes(blk->bs, sector_num, nb_sectors, flags);
}
static void error_callback_bh(void *opaque)
{
struct BlockBackendAIOCB *acb = opaque;

2
include/sysemu/block-backend.h
View file

@ -87,6 +87,8 @@ int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf,
int nb_sectors);
int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf,
int nb_sectors);
int blk_write_zeroes(BlockBackend *blk, int64_t sector_num,
int nb_sectors, BdrvRequestFlags flags);
BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num,
int nb_sectors, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque);