diff options
| author | Christoph Hellwig <hch@lst.de> | 2024-05-06 06:20:24 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-05-07 07:29:42 -0600 |
| commit | 81c2168c229bab0665e862937bb476f18cff056d (patch) | |
| tree | a96b233b540d299a767a343997d8b1a11efe10d5 | |
| parent | 30f1e724142242a453f92d90b33e030014900bf0 (diff) | |
| download | linux-81c2168c229bab0665e862937bb476f18cff056d.tar.gz | |
block: add a bio_chain_and_submit helper
This is basically blk_next_bio just with the bio allocation moved
to the caller to allow for more flexible bio handling in the caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240506042027.2289826-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/bio.c | 27 | ||||
| -rw-r--r-- | include/linux/bio.h | 1 |
2 files changed, 20 insertions, 8 deletions
diff --git a/block/bio.c b/block/bio.c index 38baedb39c6f2e..d82ef4fd545cb2 100644 --- a/block/bio.c +++ b/block/bio.c @@ -345,18 +345,29 @@ void bio_chain(struct bio *bio, struct bio *parent) } EXPORT_SYMBOL(bio_chain); -struct bio *blk_next_bio(struct bio *bio, struct block_device *bdev, - unsigned int nr_pages, blk_opf_t opf, gfp_t gfp) +/** + * bio_chain_and_submit - submit a bio after chaining it to another one + * @prev: bio to chain and submit + * @new: bio to chain to + * + * If @prev is non-NULL, chain it to @new and submit it. + * + * Return: @new. + */ +struct bio *bio_chain_and_submit(struct bio *prev, struct bio *new) { - struct bio *new = bio_alloc(bdev, nr_pages, opf, gfp); - - if (bio) { - bio_chain(bio, new); - submit_bio(bio); + if (prev) { + bio_chain(prev, new); + submit_bio(prev); } - return new; } + +struct bio *blk_next_bio(struct bio *bio, struct block_device *bdev, + unsigned int nr_pages, blk_opf_t opf, gfp_t gfp) +{ + return bio_chain_and_submit(bio, bio_alloc(bdev, nr_pages, opf, gfp)); +} EXPORT_SYMBOL_GPL(blk_next_bio); static void bio_alloc_rescue(struct work_struct *work) diff --git a/include/linux/bio.h b/include/linux/bio.h index 9b8a369f44bc6b..283a0dcbd1de61 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -831,5 +831,6 @@ static inline void bio_clear_polled(struct bio *bio) struct bio *blk_next_bio(struct bio *bio, struct block_device *bdev, unsigned int nr_pages, blk_opf_t opf, gfp_t gfp); +struct bio *bio_chain_and_submit(struct bio *prev, struct bio *new); #endif /* __LINUX_BIO_H */ |