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block: Refuse request/bio merges with gaps in the integrity payload

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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 <[email protected]>

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 <[email protected]>
This commit is contained in:
Sagi Grimberg 2015-09-11 09:03:04 -06:00 • committed by Jens Axboe
commit 7f39add3b0
3 changed files with 39 additions and 0 deletions
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3
block/blk-integrity.c
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@ -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);