diff options
Diffstat (limited to 'include/block/block.h')
| -rw-r--r-- | include/block/block.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h index 1027c58a41..d16c401cb4 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -658,6 +658,20 @@ AioContext *coroutine_fn bdrv_co_enter(BlockDriverState *bs); void coroutine_fn bdrv_co_leave(BlockDriverState *bs, AioContext *old_ctx); /** + * Locks the AioContext of @bs if it's not the current AioContext. This avoids + * double locking which could lead to deadlocks: This is a coroutine_fn, so we + * know we already own the lock of the current AioContext. + * + * May only be called in the main thread. + */ +void coroutine_fn bdrv_co_lock(BlockDriverState *bs); + +/** + * Unlocks the AioContext of @bs if it's not the current AioContext. + */ +void coroutine_fn bdrv_co_unlock(BlockDriverState *bs); + +/** * Transfer control to @co in the aio context of @bs */ void bdrv_coroutine_enter(BlockDriverState *bs, Coroutine *co); |