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blk-mq: introduce blk_mq_request_completed()

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NVMe needs this function to decide if one request to be aborted has
been completed in normal IO path already.

So introduce it.

Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei
2019-07-24 11:48:39 +08:00
committed by Jens Axboe
parent e21a712a96
commit aa306ab703
2 changed files with 7 additions and 0 deletions
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6
block/blk-mq.c
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@@ -665,6 +665,12 @@ int blk_mq_request_started(struct request *rq)
} }
EXPORT_SYMBOL_GPL(blk_mq_request_started); EXPORT_SYMBOL_GPL(blk_mq_request_started);
int blk_mq_request_completed(struct request *rq)
{
return blk_mq_rq_state(rq) == MQ_RQ_COMPLETE;
}
EXPORT_SYMBOL_GPL(blk_mq_request_completed);
void blk_mq_start_request(struct request *rq) void blk_mq_start_request(struct request *rq)
{ {
struct request_queue *q = rq->q; struct request_queue *q = rq->q;

1
include/linux/blk-mq.h
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@@ -296,6 +296,7 @@ static inline u16 blk_mq_unique_tag_to_tag(u32 unique_tag)
int blk_mq_request_started(struct request *rq); int blk_mq_request_started(struct request *rq);
int blk_mq_request_completed(struct request *rq);
void blk_mq_start_request(struct request *rq); void blk_mq_start_request(struct request *rq);
void blk_mq_end_request(struct request *rq, blk_status_t error); void blk_mq_end_request(struct request *rq, blk_status_t error);
void __blk_mq_end_request(struct request *rq, blk_status_t error); void __blk_mq_end_request(struct request *rq, blk_status_t error);