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block: support PI at non-zero offset within metadata

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Block layer integrity processing assumes that protection information
(PI) is placed in the first bytes of each metadata block.

Remove this limitation and include the metadata before the PI in the
calculation of the guard tag.

Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Chinmay Gameti <c.gameti@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240201130126.211402-3-joshi.k@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kanchan Joshi
2024-02-01 18:31:25 +05:30
committed by Jens Axboe
parent 6b5c132a3f
commit 60d21aac52
5 changed files with 42 additions and 14 deletions
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include/linux/blkdev.h
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@@ -108,6 +108,7 @@ struct blk_integrity {
const struct blk_integrity_profile *profile;
unsigned char flags;
unsigned char tuple_size;
unsigned char pi_offset;
unsigned char interval_exp;
unsigned char tag_size;
};