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block: ensure correct integrity capability propagation in stacked devices 

queue_limits_stack_integrity() incorrectly sets
BLK_INTEGRITY_DEVICE_CAPABLE for a DM device even when none of its
underlying devices support integrity. This happens because the flag is
inherited unconditionally. Ensure that integrity capabilities are
correctly propagated only when the underlying devices actually support
integrity.

Reported-by: M Nikhil <nikh1092@linux.ibm.com>
Link: https://lore.kernel.org/linux-block/f6130475-3ccd-45d2-abde-3ccceada0f0a@linux.ibm.com/
Fixes: c6e56cf6b2 ("block: move integrity information into queue_limits")
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20250305063033.1813-2-anuj20.g@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Anuj Gupta 2025-03-05 12:00:32 +05:30 committed by Jens Axboe
parent 6cc477c368
commit 677e332e48
1 changed files with 21 additions and 29 deletions
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50
block/blk-settings.c
View File

@ -864,36 +864,28 @@ bool queue_limits_stack_integrity(struct queue_limits *t,
if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY))
return true;
if (!ti->tuple_size) {
/* inherit the settings from the first underlying device */
if (!(ti->flags & BLK_INTEGRITY_STACKED)) {
ti->flags = BLK_INTEGRITY_DEVICE_CAPABLE |
(bi->flags & BLK_INTEGRITY_REF_TAG);
ti->csum_type = bi->csum_type;
ti->tuple_size = bi->tuple_size;
ti->pi_offset = bi->pi_offset;
ti->interval_exp = bi->interval_exp;
ti->tag_size = bi->tag_size;
goto done;
}
if (!bi->tuple_size)
goto done;
if (ti->flags & BLK_INTEGRITY_STACKED) {
if (ti->tuple_size != bi->tuple_size)
goto incompatible;
if (ti->interval_exp != bi->interval_exp)
goto incompatible;
if (ti->tag_size != bi->tag_size)
goto incompatible;
if (ti->csum_type != bi->csum_type)
goto incompatible;
if ((ti->flags & BLK_INTEGRITY_REF_TAG) !=
(bi->flags & BLK_INTEGRITY_REF_TAG))
goto incompatible;
} else {
ti->flags = BLK_INTEGRITY_STACKED;
ti->flags |= (bi->flags & BLK_INTEGRITY_DEVICE_CAPABLE) |
(bi->flags & BLK_INTEGRITY_REF_TAG);
ti->csum_type = bi->csum_type;
ti->tuple_size = bi->tuple_size;
ti->pi_offset = bi->pi_offset;
ti->interval_exp = bi->interval_exp;
ti->tag_size = bi->tag_size;
}
if (ti->tuple_size != bi->tuple_size)
goto incompatible;
if (ti->interval_exp != bi->interval_exp)
goto incompatible;
if (ti->tag_size != bi->tag_size)
goto incompatible;
if (ti->csum_type != bi->csum_type)
goto incompatible;
if ((ti->flags & BLK_INTEGRITY_REF_TAG) !=
(bi->flags & BLK_INTEGRITY_REF_TAG))
goto incompatible;
done:
ti->flags |= BLK_INTEGRITY_STACKED;
return true;
incompatible: