[PATCH v3 03/10] block: introduce bio_required_sector_alignment()
From: Satya Tangirala <hidden>
Date: 2021-06-04 20:00:24
Also in:
lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
This function returns the required alignment for the number of sectors in a bio. In particular, the number of sectors passed to bio_split() must be aligned to this value. Signed-off-by: Satya Tangirala <redacted> --- block/blk.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/block/blk.h b/block/blk.h
index 8b3591aee0a5..c8dcad7dde81 100644
--- a/block/blk.h
+++ b/block/blk.h@@ -262,6 +262,20 @@ static inline unsigned int bio_allowed_max_sectors(struct request_queue *q) return round_down(UINT_MAX, queue_logical_block_size(q)) >> 9; } +/* + * The required sector alignment for a bio. The number of sectors in any bio + * must be aligned to this value. + */ +static inline unsigned int bio_required_sector_alignment(struct bio *bio) +{ + unsigned int alignmask = + (bdev_logical_block_size(bio->bi_bdev) >> SECTOR_SHIFT) - 1; + + alignmask |= blk_crypto_bio_sectors_alignment(bio) - 1; + + return alignmask + 1; +} + /* * The max bio size which is aligned to q->limits.discard_granularity. This * is a hint to split large discard bio in generic block layer, then if device
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2.32.0.rc1.229.g3e70b5a671-goog