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block-backend: convert blk_foo wrappers to use int64_t bytes parameter

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Convert blk_pdiscard, blk_pwrite_compressed, blk_pwrite_zeroes.
These are just wrappers for functions with int64_t argument, so allow
passing int64_t as well. Parameter type becomes wider so all callers
should be OK with it.

Note that requests exceeding INT_MAX are still restricted by
blk_check_byte_request().

Note also that we don't (and are not going to) convert blk_pwrite and
blk_pread: these functions return number of bytes on success, so to
update them, we should change return type to int64_t as well, which
will lead to investigating and updating all callers which is too much.

So, blk_pread and blk_pwrite remain unchanged.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20211006131718.214235-9-vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: grammar tweaks]
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-10-06 15:17:14 +02:00 committed by Eric Blake
parent 16d36e2996
commit 06f0325c5b
2 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
block/block-backend.c
View File

@ -1330,7 +1330,7 @@ typedef struct BlkRwCo {
} BlkRwCo;
int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int bytes, BdrvRequestFlags flags)
int64_t bytes, BdrvRequestFlags flags)
{
return blk_pwritev_part(blk, offset, bytes, NULL, 0,
flags | BDRV_REQ_ZERO_WRITE);
@ -1637,7 +1637,7 @@ int coroutine_fn blk_co_pdiscard(BlockBackend *blk, int64_t offset,
return ret;
}
int blk_pdiscard(BlockBackend *blk, int64_t offset, int bytes)
int blk_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes)
{
int ret;
@ -2186,10 +2186,10 @@ int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
}
int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
int count)
int64_t bytes)
{
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, count);
return blk_pwritev_part(blk, offset, count, &qiov, 0,
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
return blk_pwritev_part(blk, offset, bytes, &qiov, 0,
BDRV_REQ_WRITE_COMPRESSED);
}

6
include/sysemu/block-backend.h
View File

@ -155,7 +155,7 @@ static inline int coroutine_fn blk_co_pwrite(BlockBackend *blk, int64_t offset,
}
int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int bytes, BdrvRequestFlags flags);
int64_t bytes, BdrvRequestFlags flags);
BlockAIOCB *blk_aio_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int bytes, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque);
@ -246,10 +246,10 @@ void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int64_t bytes, BdrvRequestFlags flags);
int blk_pwrite_compressed(BlockBackend *blk, int64_t offset, const void *buf,
int bytes);
int64_t bytes);
int blk_truncate(BlockBackend *blk, int64_t offset, bool exact,
PreallocMode prealloc, BdrvRequestFlags flags, Error **errp);
int blk_pdiscard(BlockBackend *blk, int64_t offset, int bytes);
int blk_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes);
int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf,
int64_t pos, int size);
int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size);