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block-backend: convert blk_co_pdiscard to int64_t bytes 

We updated blk_do_pdiscard() and its wrapper blk_co_pdiscard(). Both
functions are updated so that the parameter type becomes wider, so all
callers should be OK with it.

Look at blk_do_pdiscard(): bytes is passed only to
blk_check_byte_request() and bdrv_co_pdiscard(), which already have
int64_t bytes parameter, so we are OK.

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

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20211006131718.214235-5-vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: grammar tweaks]
Signed-off-by: Eric Blake <eblake@redhat.com>
staging
Vladimir Sementsov-Ogievskiy 2021-10-06 15:17:10 +02:00 committed by Eric Blake
parent 34460feb63
commit 2800637a33
2 changed files with 5 additions and 3 deletions
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5
block/block-backend.c
View File

@ -1626,7 +1626,7 @@ BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
/* To be called between exactly one pair of blk_inc/dec_in_flight() */
static int coroutine_fn
blk_do_pdiscard(BlockBackend *blk, int64_t offset, int bytes)
blk_do_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes)
{
int ret;
@ -1657,7 +1657,8 @@ BlockAIOCB *blk_aio_pdiscard(BlockBackend *blk,
cb, opaque);
}
int coroutine_fn blk_co_pdiscard(BlockBackend *blk, int64_t offset, int bytes)
int coroutine_fn blk_co_pdiscard(BlockBackend *blk, int64_t offset,
int64_t bytes)
{
int ret;

3
include/sysemu/block-backend.h
View File

@ -181,7 +181,8 @@ void blk_aio_cancel_async(BlockAIOCB *acb);
int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf);
BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
BlockCompletionFunc *cb, void *opaque);
int blk_co_pdiscard(BlockBackend *blk, int64_t offset, int bytes);
int coroutine_fn blk_co_pdiscard(BlockBackend *blk, int64_t offset,
int64_t bytes);
int blk_co_flush(BlockBackend *blk);
int blk_flush(BlockBackend *blk);
int blk_commit_all(void);