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| author | Sagi Grimberg <sagig@mellanox.com> | 2015-09-11 17:03:04 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-09-11 17:03:04 +0200 |
| commit | 7f39add3b08cbbdb99abe50e6d7c342e6800d684 (patch) | |
| tree | dd495ebf5446f531d88aee04f00857cff243e586 /block | |
| parent | block: Check for gaps on front and back merges (diff) | |
| download | linux-7f39add3b08cbbdb99abe50e6d7c342e6800d684.tar.xz linux-7f39add3b08cbbdb99abe50e6d7c342e6800d684.zip | |
block: Refuse request/bio merges with gaps in the integrity payload
If a driver sets the block queue virtual boundary mask, it means that
it cannot handle gaps so we must not allow those in the integrity
payload as well.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Fixed up by me to have duplicate integrity merge functions, depending
on whether block integrity is enabled or not. Fixes a compilations
issue with CONFIG_BLK_DEV_INTEGRITY unset.
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-integrity.c | 3 | ||||
| -rw-r--r-- | block/blk-merge.c | 6 |
2 files changed, 9 insertions, 0 deletions
diff --git a/block/blk-integrity.c b/block/blk-integrity.c index f548b64be092..75f29cf70188 100644 --- a/block/blk-integrity.c +++ b/block/blk-integrity.c @@ -204,6 +204,9 @@ bool blk_integrity_merge_rq(struct request_queue *q, struct request *req, q->limits.max_integrity_segments) return false; + if (integrity_req_gap_back_merge(req, next->bio)) + return false; + return true; } EXPORT_SYMBOL(blk_integrity_merge_rq); diff --git a/block/blk-merge.c b/block/blk-merge.c index d9eddbc189f5..574ea7c0468f 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -440,6 +440,9 @@ int ll_back_merge_fn(struct request_queue *q, struct request *req, { if (req_gap_back_merge(req, bio)) return 0; + if (blk_integrity_rq(req) && + integrity_req_gap_back_merge(req, bio)) + return 0; if (blk_rq_sectors(req) + bio_sectors(bio) > blk_rq_get_max_sectors(req)) { req->cmd_flags |= REQ_NOMERGE; @@ -461,6 +464,9 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req, if (req_gap_front_merge(req, bio)) return 0; + if (blk_integrity_rq(req) && + integrity_req_gap_front_merge(req, bio)) + return 0; if (blk_rq_sectors(req) + bio_sectors(bio) > blk_rq_get_max_sectors(req)) { req->cmd_flags |= REQ_NOMERGE; |