diff mbox series

[V2,1/5] blk-mq: introduce blk_mq_request_completed()

Message ID 20190724034843.10879-2-ming.lei@redhat.com (mailing list archive)
State New, archived
Headers show
Series blk-mq: wait until completed req's complete fn is run | expand

Commit Message

Ming Lei July 24, 2019, 3:48 a.m. UTC 
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>
---
 block/blk-mq.c         | 6 ++++++
 include/linux/blk-mq.h | 1 +
 2 files changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/block/blk-mq.c b/block/blk-mq.c
index b038ec680e84..e1d0b4567388 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -665,6 +665,12 @@  int blk_mq_request_started(struct request *rq)
 }
 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)
 {
 	struct request_queue *q = rq->q;
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index ab25e69a15d1..cc5115ca0e19 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -303,6 +303,7 @@  static inline u16 blk_mq_unique_tag_to_tag(u32 unique_tag)
 
 
 int blk_mq_request_started(struct request *rq);
+int blk_mq_request_completed(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);