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| author | Christoph Hellwig <hch@lst.de> | 2019-03-03 08:38:29 -0700 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-04-05 08:07:57 +0200 |
| commit | 2a876f5e25e8ec9fa5777d36e5695ee33dd63f6f (patch) | |
| tree | dd1f6e267f5cb0417264a4b24db2a25c2b6f099b | |
| parent | 3aef3cae4342c1d8137a1c0782cbb66f1be3943c (diff) | |
| download | linux-2a876f5e25e8ec9fa5777d36e5695ee33dd63f6f.tar.bz2 | |
block: add a rq_integrity_vec helper
This provides a nice little shortcut to get the integrity data for
drivers like NVMe that only support a single integrity segment.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
| -rw-r--r-- | include/linux/blkdev.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 84ce76f92d83..3a13fbe13e08 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1559,6 +1559,17 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, return bio_integrity_intervals(bi, sectors) * bi->tuple_size; } +/* + * Return the first bvec that contains integrity data. Only drivers that are + * limited to a single integrity segment should use this helper. + */ +static inline struct bio_vec *rq_integrity_vec(struct request *rq) +{ + if (WARN_ON_ONCE(queue_max_integrity_segments(rq->q) > 1)) + return NULL; + return rq->bio->bi_integrity->bip_vec; +} + #else /* CONFIG_BLK_DEV_INTEGRITY */ struct bio; @@ -1633,6 +1644,11 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, return 0; } +static inline struct bio_vec *rq_integrity_vec(struct request *rq) +{ + return NULL; +} + #endif /* CONFIG_BLK_DEV_INTEGRITY */ struct block_device_operations { |