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block: centralize PI remapping logic to the block layer

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Currently t10_pi_prepare/t10_pi_complete functions are called during the
NVMe and SCSi layers command preparetion/completion, but their actual
place should be the block layer since T10-PI is a general data integrity
feature that is used by block storage protocols. Introduce .prepare_fn
and .complete_fn callbacks within the integrity profile that each type
can implement according to its needs.

Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Suggested-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>

Fixed to not call queue integrity functions if BLK_DEV_INTEGRITY
isn't defined in the config.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Max Gurtovoy
2019-09-16 18:44:29 +03:00
committed by Jens Axboe
parent 5eaed68dd3
commit 54d4e6ab91
9 changed files with 114 additions and 99 deletions
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10
drivers/md/dm-integrity.c
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@@ -345,6 +345,14 @@ static void __DEBUG_bytes(__u8 *bytes, size_t len, const char *msg, ...)
#define DEBUG_bytes(bytes, len, msg, ...) do { } while (0)
#endif
static void dm_integrity_prepare(struct request *rq)
{
}
static void dm_integrity_complete(struct request *rq, unsigned int nr_bytes)
{
}
/*
* DM Integrity profile, protection is performed layer above (dm-crypt)
*/
@@ -352,6 +360,8 @@ static const struct blk_integrity_profile dm_integrity_profile = {
.name = "DM-DIF-EXT-TAG",
.generate_fn = NULL,
.verify_fn = NULL,
.prepare_fn = dm_integrity_prepare,
.complete_fn = dm_integrity_complete,
};
static void dm_integrity_map_continue(struct dm_integrity_io *dio, bool from_map);