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 <satyat@xxxxxxxxxx>
---
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
--
2.32.0.rc1.229.g3e70b5a671-goog
