From: Hannes Reinecke <hare@xxxxxxxx> Add function to check if a blk-mq request is from the reserved pool Signed-off-by: Hannes Reinecke <hare@xxxxxxxx> --- block/blk-mq.c | 13 +++++++++++++ include/linux/blk-mq.h | 2 ++ 2 files changed, 15 insertions(+) diff --git a/block/blk-mq.c b/block/blk-mq.c index d92088dec6c3..603c60a1956c 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -269,6 +269,19 @@ static inline bool blk_mq_need_time_stamp(struct request *rq) return (rq->rq_flags & (RQF_IO_STAT | RQF_STATS)) || rq->q->elevator; } +/** + * blk_mq_rq_is_reserved - Check if a request has a reserved tag + * + * @rq: Request to check + */ +bool blk_mq_rq_is_reserved(struct request *rq) +{ + struct blk_mq_hw_ctx *hctx = rq->mq_hctx; + + return blk_mq_tag_is_reserved(hctx->tags, rq->tag); +} +EXPORT_SYMBOL_GPL(blk_mq_rq_is_reserved); + static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data, unsigned int tag, unsigned int op, u64 alloc_time_ns) { diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 11cfd6470b1a..8bdc35ac4a63 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -548,6 +548,8 @@ static inline void *blk_mq_rq_to_pdu(struct request *rq) return rq + 1; } +bool blk_mq_rq_is_reserved(struct request *rq); + #define queue_for_each_hw_ctx(q, hctx, i) \ for ((i) = 0; (i) < (q)->nr_hw_queues && \ ({ hctx = (q)->queue_hw_ctx[i]; 1; }); (i)++) -- 2.17.1