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block: Make 'bytes' param of bdrv_co_{pread,pwrite,preadv,pwritev}() an int64_t 

For consistency with other I/O functions, and in preparation to
implement bdrv_{pread,pwrite}() using generated_co_wrapper.

unsigned int fits in int64_t, so all callers remain correct.

bdrv_check_request32() is called further down the stack and causes -EIO
to be returned if 'bytes' is negative or greater than
BDRV_REQUEST_MAX_BYTES, which in turns never exceeds SIZE_MAX.

Signed-off-by: Alberto Faria <afaria@redhat.com>
Message-Id: <20220609152744.3891847-7-afaria@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
This commit is contained in:
Alberto Faria 2022-06-09 16:27:40 +01:00 committed by Hanna Reitz
parent ca71a64ee5
commit c1458c66b2
2 changed files with 4 additions and 4 deletions
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4
block/coroutines.h
View File

@ -91,11 +91,11 @@ int coroutine_fn blk_co_do_flush(BlockBackend *blk);
*/
int generated_co_wrapper
bdrv_preadv(BdrvChild *child, int64_t offset, unsigned int bytes,
bdrv_preadv(BdrvChild *child, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags);
int generated_co_wrapper
bdrv_pwritev(BdrvChild *child, int64_t offset, unsigned int bytes,
bdrv_pwritev(BdrvChild *child, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, BdrvRequestFlags flags);
int generated_co_wrapper

4
include/block/block_int-io.h
View File

@ -56,7 +56,7 @@ int coroutine_fn bdrv_co_pwritev_part(BdrvChild *child,
QEMUIOVector *qiov, size_t qiov_offset, BdrvRequestFlags flags);
static inline int coroutine_fn bdrv_co_pread(BdrvChild *child,
int64_t offset, unsigned int bytes, void *buf, BdrvRequestFlags flags)
int64_t offset, int64_t bytes, void *buf, BdrvRequestFlags flags)
{
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
IO_CODE();
@ -65,7 +65,7 @@ static inline int coroutine_fn bdrv_co_pread(BdrvChild *child,
}
static inline int coroutine_fn bdrv_co_pwrite(BdrvChild *child,
int64_t offset, unsigned int bytes, const void *buf, BdrvRequestFlags flags)
int64_t offset, int64_t bytes, const void *buf, BdrvRequestFlags flags)
{
QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, buf, bytes);
IO_CODE();