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| 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 /block/bio.c | |
| parent | e8b4869bc78da1a71f2a2ab476caf50c1dcfeed0 (diff) | |
| download | linux-0f8e9ecc4636e3abb4f3cf1ead14c94cce7dfde8.tar.gz linux-0f8e9ecc4636e3abb4f3cf1ead14c94cce7dfde8.tar.bz2 linux-0f8e9ecc4636e3abb4f3cf1ead14c94cce7dfde8.zip | |
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>
Diffstat (limited to 'block/bio.c')
| -rw-r--r-- | block/bio.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c index d82ef4fd545c..dce12a0efdea 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)) |