diff options
| -rw-r--r-- | block.c | 27 | ||||
| -rw-r--r-- | include/block/aio.h | 2 | ||||
| -rw-r--r-- | include/block/block.h | 1 |
3 files changed, 29 insertions, 1 deletions
@@ -4640,7 +4640,32 @@ int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, int num_reqs) void bdrv_aio_cancel(BlockDriverAIOCB *acb) { - acb->aiocb_info->cancel(acb); + if (acb->aiocb_info->cancel) { + acb->aiocb_info->cancel(acb); + } else { + qemu_aio_ref(acb); + bdrv_aio_cancel_async(acb); + while (acb->refcnt > 1) { + if (acb->aiocb_info->get_aio_context) { + aio_poll(acb->aiocb_info->get_aio_context(acb), true); + } else if (acb->bs) { + aio_poll(bdrv_get_aio_context(acb->bs), true); + } else { + abort(); + } + } + qemu_aio_release(acb); + } +} + +/* Async version of aio cancel. The caller is not blocked if the acb implements + * cancel_async, otherwise we do nothing and let the request normally complete. + * In either case the completion callback must be called. */ +void bdrv_aio_cancel_async(BlockDriverAIOCB *acb) +{ + if (acb->aiocb_info->cancel_async) { + acb->aiocb_info->cancel_async(acb); + } } /**************************************************************/ diff --git a/include/block/aio.h b/include/block/aio.h index 2626fc745f..ad361e34c7 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -27,6 +27,8 @@ typedef void BlockDriverCompletionFunc(void *opaque, int ret); typedef struct AIOCBInfo { void (*cancel)(BlockDriverAIOCB *acb); + void (*cancel_async)(BlockDriverAIOCB *acb); + AioContext *(*get_aio_context)(BlockDriverAIOCB *acb); size_t aiocb_size; } AIOCBInfo; diff --git a/include/block/block.h b/include/block/block.h index 07d6d8e67e..3318f0dfbe 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -337,6 +337,7 @@ BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors, BlockDriverCompletionFunc *cb, void *opaque); void bdrv_aio_cancel(BlockDriverAIOCB *acb); +void bdrv_aio_cancel_async(BlockDriverAIOCB *acb); typedef struct BlockRequest { /* Fields to be filled by multiwrite caller */ |