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block: Switch blk_*write_zeroes() to byte interface

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Sector-based blk_write() should die; convert the one-off
variant blk_write_zeroes() to use an offset/count interface
instead.  Likewise for blk_co_write_zeroes() and
blk_aio_write_zeroes().

Signed-off-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2016-05-06 10:26:29 -06:00 • committed by Kevin Wolf
parent b7d17f9fa4
commit 983a160050
6 changed files with 25 additions and 36 deletions
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12
include/sysemu/block-backend.h
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@ -96,10 +96,10 @@ int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
int count);
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,
int blk_write_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags);
BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque);
int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count);
int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count,
@ -179,8 +179,8 @@ int blk_get_open_flags_from_root_state(BlockBackend *blk);
void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
BlockCompletionFunc *cb, void *opaque);
int coroutine_fn blk_co_write_zeroes(BlockBackend *blk, int64_t sector_num,
int nb_sectors, BdrvRequestFlags flags);
int coroutine_fn blk_co_write_zeroes(BlockBackend *blk, int64_t offset,
int count, BdrvRequestFlags flags);
int blk_write_compressed(BlockBackend *blk, int64_t sector_num,
const uint8_t *buf, int nb_sectors);
int blk_truncate(BlockBackend *blk, int64_t offset);