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43a5e4e219
blk_mq_drain_queue() is introduced so that we can drain mq queue inside blk_cleanup_queue(). Also don't accept new requests any more if queue is marked as dying. Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
#ifndef INT_BLK_MQ_H
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#define INT_BLK_MQ_H
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struct blk_mq_ctx {
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struct {
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spinlock_t lock;
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struct list_head rq_list;
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} ____cacheline_aligned_in_smp;
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unsigned int cpu;
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unsigned int index_hw;
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unsigned int ipi_redirect;
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/* incremented at dispatch time */
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unsigned long rq_dispatched[2];
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unsigned long rq_merged;
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/* incremented at completion time */
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unsigned long ____cacheline_aligned_in_smp rq_completed[2];
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struct request_queue *queue;
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struct kobject kobj;
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};
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void __blk_mq_end_io(struct request *rq, int error);
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void blk_mq_complete_request(struct request *rq, int error);
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void blk_mq_run_request(struct request *rq, bool run_queue, bool async);
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void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
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void blk_mq_init_flush(struct request_queue *q);
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void blk_mq_drain_queue(struct request_queue *q);
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/*
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* CPU hotplug helpers
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*/
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struct blk_mq_cpu_notifier;
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void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier,
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void (*fn)(void *, unsigned long, unsigned int),
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void *data);
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void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
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void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
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void blk_mq_cpu_init(void);
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DECLARE_PER_CPU(struct llist_head, ipi_lists);
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/*
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* CPU -> queue mappings
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*/
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struct blk_mq_reg;
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extern unsigned int *blk_mq_make_queue_map(struct blk_mq_reg *reg);
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extern int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues);
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void blk_mq_add_timer(struct request *rq);
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#endif
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