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nvme: allow integrity when PI is not in first bytes

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NVM command set 1.0 (or later) mandates PI to be in the last bytes of
metadata. But this was not supported in the block-layer, and driver
registered a nop profile.

Since block-integrity can now handle flexible PI offset, change the
driver to support this configuration.

Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240201130126.211402-4-joshi.k@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Kanchan Joshi 2024-02-01 18:31:26 +05:30 committed by Jens Axboe
parent 60d21aac52
commit 921e81db52
2 changed files with 8 additions and 1 deletions
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8
drivers/nvme/host/core.c
View File

@ -1771,6 +1771,7 @@ static void nvme_init_integrity(struct gendisk *disk,
}
integrity.tuple_size = head->ms;
integrity.pi_offset = head->pi_offset;
blk_integrity_register(disk, &integrity);
blk_queue_max_integrity_segments(disk->queue, max_integrity_segments);
}
@ -1880,11 +1881,16 @@ static int nvme_init_ms(struct nvme_ctrl *ctrl, struct nvme_ns_head *head,
free_data:
kfree(nvm);
set_pi:
if (head->pi_size && (first || head->ms == head->pi_size))
if (head->pi_size && head->ms >= head->pi_size)
head->pi_type = id->dps & NVME_NS_DPS_PI_MASK;
else
head->pi_type = 0;
if (first)
head->pi_offset = 0;
else
head->pi_offset = head->ms - head->pi_size;
return ret;
}

1
drivers/nvme/host/nvme.h
View File

@ -463,6 +463,7 @@ struct nvme_ns_head {
u16 ms;
u16 pi_size;
u8 pi_type;
u8 pi_offset;
u8 guard_type;
u16 sgs;
u32 sws;