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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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14ccb66b3f
We only need the number of segments in the blk-mq submission path. Remove the field from struct bio, and return it from a variant of blk_queue_split instead of that it can passed as an argument to those functions that need the value. This also means we stop recounting segments except for cloning and partial segments. To keep the number of arguments in this how path down remove pointless struct request_queue arguments from any of the functions that had it and grew a nr_segs argument. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef BLK_MQ_SCHED_H
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#define BLK_MQ_SCHED_H
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#include "blk-mq.h"
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#include "blk-mq-tag.h"
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void blk_mq_sched_free_hctx_data(struct request_queue *q,
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void (*exit)(struct blk_mq_hw_ctx *));
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void blk_mq_sched_assign_ioc(struct request *rq);
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void blk_mq_sched_request_inserted(struct request *rq);
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bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
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unsigned int nr_segs, struct request **merged_request);
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bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
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unsigned int nr_segs);
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bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
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void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
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void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
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void blk_mq_sched_insert_request(struct request *rq, bool at_head,
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bool run_queue, bool async);
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void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
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struct blk_mq_ctx *ctx,
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struct list_head *list, bool run_queue_async);
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void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
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int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
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void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
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void blk_mq_sched_free_requests(struct request_queue *q);
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static inline bool
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blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
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unsigned int nr_segs)
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{
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if (blk_queue_nomerges(q) || !bio_mergeable(bio))
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return false;
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return __blk_mq_sched_bio_merge(q, bio, nr_segs);
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}
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static inline bool
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blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
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struct bio *bio)
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{
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struct elevator_queue *e = q->elevator;
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if (e && e->type->ops.allow_merge)
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return e->type->ops.allow_merge(q, rq, bio);
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return true;
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}
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static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
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{
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struct elevator_queue *e = rq->q->elevator;
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if (e && e->type->ops.completed_request)
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e->type->ops.completed_request(rq, now);
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}
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static inline void blk_mq_sched_started_request(struct request *rq)
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{
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struct request_queue *q = rq->q;
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struct elevator_queue *e = q->elevator;
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if (e && e->type->ops.started_request)
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e->type->ops.started_request(rq);
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}
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static inline void blk_mq_sched_requeue_request(struct request *rq)
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{
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struct request_queue *q = rq->q;
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struct elevator_queue *e = q->elevator;
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if (e && e->type->ops.requeue_request)
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e->type->ops.requeue_request(rq);
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}
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static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
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{
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struct elevator_queue *e = hctx->queue->elevator;
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if (e && e->type->ops.has_work)
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return e->type->ops.has_work(hctx);
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return false;
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}
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static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
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{
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return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
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}
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#endif
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