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block: Don't merge requests if integrity flags differ

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We'd occasionally merge requests with conflicting integrity flags.
Introduce a merge helper which checks that the requests have compatible
integrity payloads.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Martin K. Petersen
2014-09-26 19:20:06 -04:00
committed by Jens Axboe
parent aae7df5019
commit 4eaf99bead
3 changed files with 39 additions and 23 deletions
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6
block/blk-merge.c
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@@ -313,7 +313,7 @@ static inline int ll_new_hw_segment(struct request_queue *q,
if (req->nr_phys_segments + nr_phys_segs > queue_max_segments(q))
goto no_merge;
if (bio_integrity(bio) && blk_integrity_merge_bio(q, req, bio))
if (blk_integrity_merge_bio(q, req, bio) == false)
goto no_merge;
/*
@@ -410,7 +410,7 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
if (total_phys_segments > queue_max_segments(q))
return 0;
if (blk_integrity_rq(req) && blk_integrity_merge_rq(q, req, next))
if (blk_integrity_merge_rq(q, req, next) == false)
return 0;
/* Merge is OK... */
@@ -590,7 +590,7 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
return false;
/* only merge integrity protected bio into ditto rq */
if (bio_integrity(bio) != blk_integrity_rq(rq))
if (blk_integrity_merge_bio(rq->q, rq, bio) == false)
return false;
/* must be using the same buffer */