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block: Mark bdrv_co_ioctl() and callers GRAPH_RDLOCK

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This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_ioctl() need to hold a reader lock for the graph.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-6-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-02-03 16:21:44 +01:00
parent 7ff9579e60
commit 26c518ab1e
5 changed files with 11 additions and 7 deletions
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3
include/block/block-io.h
View file

@ -97,7 +97,8 @@ void bdrv_aio_cancel(BlockAIOCB *acb);
void bdrv_aio_cancel_async(BlockAIOCB *acb);
/* sg packet commands */
int coroutine_fn bdrv_co_ioctl(BlockDriverState *bs, int req, void *buf);
int coroutine_fn GRAPH_RDLOCK
bdrv_co_ioctl(BlockDriverState *bs, int req, void *buf);
/* Ensure contents are flushed to disk. */
int coroutine_fn bdrv_co_flush(BlockDriverState *bs);

9
include/block/block_int-common.h
View file

@ -714,11 +714,12 @@ struct BlockDriver {
void coroutine_fn (*bdrv_co_lock_medium)(BlockDriverState *bs, bool locked);
/* to control generic scsi devices */
BlockAIOCB *(*bdrv_aio_ioctl)(BlockDriverState *bs,
unsigned long int req, void *buf,
BlockAIOCB *coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_aio_ioctl)(
BlockDriverState *bs, unsigned long int req, void *buf,
BlockCompletionFunc *cb, void *opaque);
int coroutine_fn (*bdrv_co_ioctl)(BlockDriverState *bs,
unsigned long int req, void *buf);
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_ioctl)(
BlockDriverState *bs, unsigned long int req, void *buf);
/*
* Returns 0 for completed check, -errno for internal errors.