diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/block.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h index ce2ac39299..1027c58a41 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -641,6 +641,23 @@ bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag); AioContext *bdrv_get_aio_context(BlockDriverState *bs); /** + * Move the current coroutine to the AioContext of @bs and return the old + * AioContext of the coroutine. Increase bs->in_flight so that draining @bs + * will wait for the operation to proceed until the corresponding + * bdrv_co_leave(). + * + * Consequently, you can't call drain inside a bdrv_co_enter/leave() section as + * this will deadlock. + */ +AioContext *coroutine_fn bdrv_co_enter(BlockDriverState *bs); + +/** + * Ends a section started by bdrv_co_enter(). Move the current coroutine back + * to old_ctx and decrease bs->in_flight again. + */ +void coroutine_fn bdrv_co_leave(BlockDriverState *bs, AioContext *old_ctx); + +/** * Transfer control to @co in the aio context of @bs */ void bdrv_coroutine_enter(BlockDriverState *bs, Coroutine *co); |