| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.10 30/93] block: fix blk_integrity_register to use templates interval_exp if not 0 | Date | Thu, 18 May 2017 12:46:59 +0200 |
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4.10-stable review patch. If anyone has any objections, please let me know.
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From: Mike Snitzer <snitzer@redhat.com>
commit 2859323e35ab5fc42f351fbda23ab544eaa85945 upstream.
When registering an integrity profile: if the template's interval_exp is not 0 use it, otherwise use the ilog2() of logical block size of the provided gendisk.
This fixes a long-standing DM linear target bug where it cannot pass integrity data to the underlying device if its logical block size conflicts with the underlying device's logical block size.
Reported-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@fb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- block/blk-integrity.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -412,7 +412,8 @@ void blk_integrity_register(struct gendi bi->flags = BLK_INTEGRITY_VERIFY | BLK_INTEGRITY_GENERATE | template->flags; - bi->interval_exp = ilog2(queue_logical_block_size(disk->queue)); + bi->interval_exp = template->interval_exp ? : + ilog2(queue_logical_block_size(disk->queue)); bi->profile = template->profile ? template->profile : &nop_profile; bi->tuple_size = template->tuple_size; bi->tag_size = template->tag_size;
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