diff options
| author | Keith Busch <kbusch@kernel.org> | 2024-05-06 06:20:26 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-05-07 07:29:42 -0600 |
| commit | 0f8e9ecc4636e3abb4f3cf1ead14c94cce7dfde8 (patch) | |
| tree | 6f321d692a7047694ba88e824f52ab0b77eb90a5 | |
| parent | e8b4869bc78da1a71f2a2ab476caf50c1dcfeed0 (diff) | |
| download | linux-0f8e9ecc4636e3abb4f3cf1ead14c94cce7dfde8.tar.gz | |
block: add a bio_await_chain helper
Add a helper to wait for an entire chain of bios to complete.
[hch: split from a larger patch, moved and changed the name now that it
is non-static]
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240506042027.2289826-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/bio.c | 20 | ||||
| -rw-r--r-- | block/blk.h | 1 |
2 files changed, 21 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c index d82ef4fd545cb2..dce12a0efdead2 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1395,6 +1395,26 @@ int submit_bio_wait(struct bio *bio) } EXPORT_SYMBOL(submit_bio_wait); +static void bio_wait_end_io(struct bio *bio) +{ + complete(bio->bi_private); + bio_put(bio); +} + +/* + * bio_await_chain - ends @bio and waits for every chained bio to complete + */ +void bio_await_chain(struct bio *bio) +{ + DECLARE_COMPLETION_ONSTACK_MAP(done, + bio->bi_bdev->bd_disk->lockdep_map); + + bio->bi_private = &done; + bio->bi_end_io = bio_wait_end_io; + bio_endio(bio); + blk_wait_io(&done); +} + void __bio_advance(struct bio *bio, unsigned bytes) { if (bio_integrity(bio)) diff --git a/block/blk.h b/block/blk.h index ee4f782d149662..d5107e65355e27 100644 --- a/block/blk.h +++ b/block/blk.h @@ -38,6 +38,7 @@ void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic); void blk_queue_start_drain(struct request_queue *q); int __bio_queue_enter(struct request_queue *q, struct bio *bio); void submit_bio_noacct_nocheck(struct bio *bio); +void bio_await_chain(struct bio *bio); static inline bool blk_try_enter_queue(struct request_queue *q, bool pm) { |