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block: add pi for extended integrity

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The NVMe specification defines new data integrity formats beyond the
t10 tuple. Add support for the specification defined CRC64 formats,
assuming the reference tag does not need to be split with the "storage
tag".

Cc: Hannes Reinecke <hare@suse.de>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20220303201312.3255347-8-kbusch@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Keith Busch
2022-03-03 12:13:11 -08:00
committed by Jens Axboe
parent f3813f4b28
commit a7d4383f17
3 changed files with 215 additions and 0 deletions
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20
include/linux/t10-pi.h
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@@ -53,4 +53,24 @@ extern const struct blk_integrity_profile t10_pi_type1_ip;
extern const struct blk_integrity_profile t10_pi_type3_crc;
extern const struct blk_integrity_profile t10_pi_type3_ip;
struct crc64_pi_tuple {
__be64 guard_tag;
__be16 app_tag;
__u8 ref_tag[6];
};
static inline u64 ext_pi_ref_tag(struct request *rq)
{
unsigned int shift = ilog2(queue_logical_block_size(rq->q));
#ifdef CONFIG_BLK_DEV_INTEGRITY
if (rq->q->integrity.interval_exp)
shift = rq->q->integrity.interval_exp;
#endif
return lower_48_bits(blk_rq_pos(rq) >> (shift - SECTOR_SHIFT));
}
extern const struct blk_integrity_profile ext_pi_type1_crc64;
extern const struct blk_integrity_profile ext_pi_type3_crc64;
#endif