diff options
| author | Keith Busch <kbusch@kernel.org> | 2025-08-27 07:12:52 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-09-09 10:27:01 -0600 |
| commit | 743bf2e0c49c835cb7c4e4ac7d5a2610587047be (patch) | |
| tree | 5fb6f60c7e805262bdb5cfc389bae81012de3154 /include/linux | |
| parent | fec2e705729dc93de5399d8b139e4746805c3d81 (diff) | |
block: add size alignment to bio_iov_iter_get_pages
The block layer tries to align bio vectors to the block device's logical
block size. Some cases don't have a block device, or we may need to
align to something larger, which we can't derive it from the queue
limits. Have the caller specify what they want, or allow any length
alignment if nothing was specified. Since the most common use case
relies on the block device's limits, a helper function is provided.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bio.h | 9 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 7 |
2 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/bio.h b/include/linux/bio.h index 13d1df02656a..a64a30131031 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -446,7 +446,14 @@ int submit_bio_wait(struct bio *bio); int bdev_rw_virt(struct block_device *bdev, sector_t sector, void *data, size_t len, enum req_op op); -int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter); +int bio_iov_iter_get_pages_aligned(struct bio *bio, struct iov_iter *iter, + unsigned len_align_mask); + +static inline int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) +{ + return bio_iov_iter_get_pages_aligned(bio, iter, 0); +} + void bio_iov_bvec_set(struct bio *bio, const struct iov_iter *iter); void __bio_release_pages(struct bio *bio, bool mark_dirty); extern void bio_set_pages_dirty(struct bio *bio); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 9efacabaa2f7..44e1066f7446 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1877,6 +1877,13 @@ static inline int bio_split_rw_at(struct bio *bio, return bio_split_io_at(bio, lim, segs, max_bytes, lim->dma_alignment); } +static inline int bio_iov_iter_get_bdev_pages(struct bio *bio, + struct iov_iter *iter, struct block_device *bdev) +{ + return bio_iov_iter_get_pages_aligned(bio, iter, + bdev_logical_block_size(bdev) - 1); +} + #define DEFINE_IO_COMP_BATCH(name) struct io_comp_batch name = { } #endif /* _LINUX_BLKDEV_H */ |