From c340b990d58c856c1636e0c10abb9e4351ad852a Mon Sep 17 00:00:00 2001
From: Keith Busch <kbusch@kernel.org>
Date: Thu, 3 Mar 2022 12:13:05 -0800
Subject: [PATCH] block: support pi with extended metadata
The nvme spec allows protection information formats with metadata
extending beyond the pi field. Use the actual size of the metadata field
for incrementing the buffer.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20220303201312.3255347-2-kbusch@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
block/bio-integrity.c | 1 +
block/t10-pi.c | 4 ++--
include/linux/blk-integrity.h | 1 +
3 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 6996e7bd66e9e..32929c89ba8a6 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -165,6 +165,7 @@ static blk_status_t bio_integrity_process(struct bio *bio,
iter.disk_name = bio->bi_bdev->bd_disk->disk_name;
iter.interval = 1 << bi->interval_exp;
+ iter.tuple_size = bi->tuple_size;
iter.seed = proc_iter->bi_sector;
iter.prot_buf = bvec_virt(bip->bip_vec);
diff --git a/block/t10-pi.c b/block/t10-pi.c
index 25a52a2a09a88..758a765188546 100644
--- a/block/t10-pi.c
+++ b/block/t10-pi.c
@@ -44,7 +44,7 @@ static blk_status_t t10_pi_generate(struct blk_integrity_iter *iter,
pi->ref_tag = 0;
iter->data_buf += iter->interval;
- iter->prot_buf += sizeof(struct t10_pi_tuple);
+ iter->prot_buf += iter->tuple_size;
iter->seed++;
}
@@ -93,7 +93,7 @@ static blk_status_t t10_pi_verify(struct blk_integrity_iter *iter,
next:
iter->data_buf += iter->interval;
- iter->prot_buf += sizeof(struct t10_pi_tuple);
+ iter->prot_buf += iter->tuple_size;
iter->seed++;
}
diff --git a/include/linux/blk-integrity.h b/include/linux/blk-integrity.h
index 8a038ea0717e4..378b2459efe2d 100644
--- a/include/linux/blk-integrity.h
+++ b/include/linux/blk-integrity.h
@@ -19,6 +19,7 @@ struct blk_integrity_iter {
sector_t seed;
unsigned int data_size;
unsigned short interval;
+ unsigned char tuple_size;
const char *disk_name;
};
--
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