61 static ssize_t queue_requests_show(struct request_queue *q, char *page)  in queue_requests_show()  argument
63 	return queue_var_show(q->nr_requests, (page));  in queue_requests_show()
67 queue_requests_store(struct request_queue *q, const char *page, size_t count)  in queue_requests_store()  argument
72 	if (!queue_is_mq(q))  in queue_requests_store()
82 	err = blk_mq_update_nr_requests(q, nr);  in queue_requests_store()
89 static ssize_t queue_ra_show(struct request_queue *q, char *page)  in queue_ra_show()  argument
91 	unsigned long ra_kb = q->backing_dev_info->ra_pages <<  in queue_ra_show()
98 queue_ra_store(struct request_queue *q, const char *page, size_t count)  in queue_ra_store()  argument
106 	q->backing_dev_info->ra_pages = ra_kb >> (PAGE_SHIFT - 10);  in queue_ra_store()
111 static ssize_t queue_max_sectors_show(struct request_queue *q, char *page)  in queue_max_sectors_show()  argument
113 	int max_sectors_kb = queue_max_sectors(q) >> 1;  in queue_max_sectors_show()
118 static ssize_t queue_max_segments_show(struct request_queue *q, char *page)  in queue_max_segments_show()  argument
120 	return queue_var_show(queue_max_segments(q), (page));  in queue_max_segments_show()
123 static ssize_t queue_max_discard_segments_show(struct request_queue *q,  in queue_max_discard_segments_show()  argument
126 	return queue_var_show(queue_max_discard_segments(q), (page));  in queue_max_discard_segments_show()
129 static ssize_t queue_max_integrity_segments_show(struct request_queue *q, char *page)  in queue_max_integrity_segments_show()  argument
131 	return queue_var_show(q->limits.max_integrity_segments, (page));  in queue_max_integrity_segments_show()
134 static ssize_t queue_max_segment_size_show(struct request_queue *q, char *page)  in queue_max_segment_size_show()  argument
136 	return queue_var_show(queue_max_segment_size(q), (page));  in queue_max_segment_size_show()
139 static ssize_t queue_logical_block_size_show(struct request_queue *q, char *page)  in queue_logical_block_size_show()  argument
141 	return queue_var_show(queue_logical_block_size(q), page);  in queue_logical_block_size_show()
144 static ssize_t queue_physical_block_size_show(struct request_queue *q, char *page)  in queue_physical_block_size_show()  argument
146 	return queue_var_show(queue_physical_block_size(q), page);  in queue_physical_block_size_show()
149 static ssize_t queue_chunk_sectors_show(struct request_queue *q, char *page)  in queue_chunk_sectors_show()  argument
151 	return queue_var_show(q->limits.chunk_sectors, page);  in queue_chunk_sectors_show()
154 static ssize_t queue_io_min_show(struct request_queue *q, char *page)  in queue_io_min_show()  argument
156 	return queue_var_show(queue_io_min(q), page);  in queue_io_min_show()
159 static ssize_t queue_io_opt_show(struct request_queue *q, char *page)  in queue_io_opt_show()  argument
161 	return queue_var_show(queue_io_opt(q), page);  in queue_io_opt_show()
164 static ssize_t queue_discard_granularity_show(struct request_queue *q, char *page)  in queue_discard_granularity_show()  argument
166 	return queue_var_show(q->limits.discard_granularity, page);  in queue_discard_granularity_show()
169 static ssize_t queue_discard_max_hw_show(struct request_queue *q, char *page)  in queue_discard_max_hw_show()  argument
173 		(unsigned long long)q->limits.max_hw_discard_sectors << 9);  in queue_discard_max_hw_show()
176 static ssize_t queue_discard_max_show(struct request_queue *q, char *page)  in queue_discard_max_show()  argument
179 		       (unsigned long long)q->limits.max_discard_sectors << 9);  in queue_discard_max_show()
182 static ssize_t queue_discard_max_store(struct request_queue *q,  in queue_discard_max_store()  argument
191 	if (max_discard & (q->limits.discard_granularity - 1))  in queue_discard_max_store()
198 	if (max_discard > q->limits.max_hw_discard_sectors)  in queue_discard_max_store()
199 		max_discard = q->limits.max_hw_discard_sectors;  in queue_discard_max_store()
201 	q->limits.max_discard_sectors = max_discard;  in queue_discard_max_store()
205 static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *page)  in queue_discard_zeroes_data_show()  argument
210 static ssize_t queue_write_same_max_show(struct request_queue *q, char *page)  in queue_write_same_max_show()  argument
213 		(unsigned long long)q->limits.max_write_same_sectors << 9);  in queue_write_same_max_show()
216 static ssize_t queue_write_zeroes_max_show(struct request_queue *q, char *page)  in queue_write_zeroes_max_show()  argument
219 		(unsigned long long)q->limits.max_write_zeroes_sectors << 9);  in queue_write_zeroes_max_show()
222 static ssize_t queue_zone_append_max_show(struct request_queue *q, char *page)  in queue_zone_append_max_show()  argument
224 	unsigned long long max_sectors = q->limits.max_zone_append_sectors;  in queue_zone_append_max_show()
230 queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)  in queue_max_sectors_store()  argument
233 		max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1,  in queue_max_sectors_store()
241 					 q->limits.max_dev_sectors >> 1);  in queue_max_sectors_store()
246 	spin_lock_irq(&q->queue_lock);  in queue_max_sectors_store()
247 	q->limits.max_sectors = max_sectors_kb << 1;  in queue_max_sectors_store()
248 	q->backing_dev_info->io_pages = max_sectors_kb >> (PAGE_SHIFT - 10);  in queue_max_sectors_store()
249 	spin_unlock_irq(&q->queue_lock);  in queue_max_sectors_store()
254 static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page)  in queue_max_hw_sectors_show()  argument
256 	int max_hw_sectors_kb = queue_max_hw_sectors(q) >> 1;  in queue_max_hw_sectors_show()
263 queue_##name##_show(struct request_queue *q, char *page)		\
266 	bit = test_bit(QUEUE_FLAG_##flag, &q->queue_flags);		\
270 queue_##name##_store(struct request_queue *q, const char *page, size_t count) \
281 		blk_queue_flag_set(QUEUE_FLAG_##flag, q);		\
283 		blk_queue_flag_clear(QUEUE_FLAG_##flag, q);		\
293 static ssize_t queue_zoned_show(struct request_queue *q, char *page)  in queue_zoned_show()  argument
295 	switch (blk_queue_zoned_model(q)) {  in queue_zoned_show()
305 static ssize_t queue_nr_zones_show(struct request_queue *q, char *page)  in queue_nr_zones_show()  argument
307 	return queue_var_show(blk_queue_nr_zones(q), page);  in queue_nr_zones_show()
310 static ssize_t queue_max_open_zones_show(struct request_queue *q, char *page)  in queue_max_open_zones_show()  argument
312 	return queue_var_show(queue_max_open_zones(q), page);  in queue_max_open_zones_show()
315 static ssize_t queue_max_active_zones_show(struct request_queue *q, char *page)  in queue_max_active_zones_show()  argument
317 	return queue_var_show(queue_max_active_zones(q), page);  in queue_max_active_zones_show()
320 static ssize_t queue_nomerges_show(struct request_queue *q, char *page)  in queue_nomerges_show()  argument
322 	return queue_var_show((blk_queue_nomerges(q) << 1) |  in queue_nomerges_show()
323 			       blk_queue_noxmerges(q), page);  in queue_nomerges_show()
326 static ssize_t queue_nomerges_store(struct request_queue *q, const char *page,  in queue_nomerges_store()  argument
335 	blk_queue_flag_clear(QUEUE_FLAG_NOMERGES, q);  in queue_nomerges_store()
336 	blk_queue_flag_clear(QUEUE_FLAG_NOXMERGES, q);  in queue_nomerges_store()
338 		blk_queue_flag_set(QUEUE_FLAG_NOMERGES, q);  in queue_nomerges_store()
340 		blk_queue_flag_set(QUEUE_FLAG_NOXMERGES, q);  in queue_nomerges_store()
345 static ssize_t queue_rq_affinity_show(struct request_queue *q, char *page)  in queue_rq_affinity_show()  argument
347 	bool set = test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags);  in queue_rq_affinity_show()
348 	bool force = test_bit(QUEUE_FLAG_SAME_FORCE, &q->queue_flags);  in queue_rq_affinity_show()
354 queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count)  in queue_rq_affinity_store()  argument
365 		blk_queue_flag_set(QUEUE_FLAG_SAME_COMP, q);  in queue_rq_affinity_store()
366 		blk_queue_flag_set(QUEUE_FLAG_SAME_FORCE, q);  in queue_rq_affinity_store()
368 		blk_queue_flag_set(QUEUE_FLAG_SAME_COMP, q);  in queue_rq_affinity_store()
369 		blk_queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q);  in queue_rq_affinity_store()
371 		blk_queue_flag_clear(QUEUE_FLAG_SAME_COMP, q);  in queue_rq_affinity_store()
372 		blk_queue_flag_clear(QUEUE_FLAG_SAME_FORCE, q);  in queue_rq_affinity_store()
378 static ssize_t queue_poll_delay_show(struct request_queue *q, char *page)  in queue_poll_delay_show()  argument
382 	if (q->poll_nsec == BLK_MQ_POLL_CLASSIC)  in queue_poll_delay_show()
385 		val = q->poll_nsec / 1000;  in queue_poll_delay_show()
390 static ssize_t queue_poll_delay_store(struct request_queue *q, const char *page,  in queue_poll_delay_store()  argument
395 	if (!q->mq_ops || !q->mq_ops->poll)  in queue_poll_delay_store()
403 		q->poll_nsec = BLK_MQ_POLL_CLASSIC;  in queue_poll_delay_store()
405 		q->poll_nsec = val * 1000;  in queue_poll_delay_store()
412 static ssize_t queue_poll_show(struct request_queue *q, char *page)  in queue_poll_show()  argument
414 	return queue_var_show(test_bit(QUEUE_FLAG_POLL, &q->queue_flags), page);  in queue_poll_show()
417 static ssize_t queue_poll_store(struct request_queue *q, const char *page,  in queue_poll_store()  argument
423 	if (!q->tag_set || q->tag_set->nr_maps <= HCTX_TYPE_POLL ||  in queue_poll_store()
424 	    !q->tag_set->map[HCTX_TYPE_POLL].nr_queues)  in queue_poll_store()
432 		blk_queue_flag_set(QUEUE_FLAG_POLL, q);  in queue_poll_store()
434 		blk_queue_flag_clear(QUEUE_FLAG_POLL, q);  in queue_poll_store()
439 static ssize_t queue_io_timeout_show(struct request_queue *q, char *page)  in queue_io_timeout_show()  argument
441 	return sprintf(page, "%u\n", jiffies_to_msecs(q->rq_timeout));  in queue_io_timeout_show()
444 static ssize_t queue_io_timeout_store(struct request_queue *q, const char *page,  in queue_io_timeout_store()  argument
454 	blk_queue_rq_timeout(q, msecs_to_jiffies(val));  in queue_io_timeout_store()
459 static ssize_t queue_wb_lat_show(struct request_queue *q, char *page)  in queue_wb_lat_show()  argument
461 	if (!wbt_rq_qos(q))  in queue_wb_lat_show()
464 	return sprintf(page, "%llu\n", div_u64(wbt_get_min_lat(q), 1000));  in queue_wb_lat_show()
467 static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page,  in queue_wb_lat_store()  argument
480 	rqos = wbt_rq_qos(q);  in queue_wb_lat_store()
482 		ret = wbt_init(q);  in queue_wb_lat_store()
488 		val = wbt_default_latency_nsec(q);  in queue_wb_lat_store()
492 	if (wbt_get_min_lat(q) == val)  in queue_wb_lat_store()
500 	blk_mq_freeze_queue(q);  in queue_wb_lat_store()
501 	blk_mq_quiesce_queue(q);  in queue_wb_lat_store()
503 	wbt_set_min_lat(q, val);  in queue_wb_lat_store()
505 	blk_mq_unquiesce_queue(q);  in queue_wb_lat_store()
506 	blk_mq_unfreeze_queue(q);  in queue_wb_lat_store()
511 static ssize_t queue_wc_show(struct request_queue *q, char *page)  in queue_wc_show()  argument
513 	if (test_bit(QUEUE_FLAG_WC, &q->queue_flags))  in queue_wc_show()
519 static ssize_t queue_wc_store(struct request_queue *q, const char *page,  in queue_wc_store()  argument
534 		blk_queue_flag_set(QUEUE_FLAG_WC, q);  in queue_wc_store()
536 		blk_queue_flag_clear(QUEUE_FLAG_WC, q);  in queue_wc_store()
541 static ssize_t queue_fua_show(struct request_queue *q, char *page)  in queue_fua_show()  argument
543 	return sprintf(page, "%u\n", test_bit(QUEUE_FLAG_FUA, &q->queue_flags));  in queue_fua_show()
546 static ssize_t queue_dax_show(struct request_queue *q, char *page)  in queue_dax_show()  argument
548 	return queue_var_show(blk_queue_dax(q), page);  in queue_dax_show()
668 	struct request_queue *q =  in queue_attr_visible()  local
672 		(!q->mq_ops || !q->mq_ops->timeout))  in queue_attr_visible()
677 	    !blk_queue_is_zoned(q))  in queue_attr_visible()
695 	struct request_queue *q =  in queue_attr_show()  local
701 	mutex_lock(&q->sysfs_lock);  in queue_attr_show()
702 	res = entry->show(q, page);  in queue_attr_show()
703 	mutex_unlock(&q->sysfs_lock);  in queue_attr_show()
712 	struct request_queue *q;  in queue_attr_store()  local
718 	q = container_of(kobj, struct request_queue, kobj);  in queue_attr_store()
719 	mutex_lock(&q->sysfs_lock);  in queue_attr_store()
720 	res = entry->store(q, page, length);  in queue_attr_store()
721 	mutex_unlock(&q->sysfs_lock);  in queue_attr_store()
727 	struct request_queue *q = container_of(rcu_head, struct request_queue,  in blk_free_queue_rcu()  local
729 	kmem_cache_free(blk_requestq_cachep, q);  in blk_free_queue_rcu()
733 static void blk_exit_queue(struct request_queue *q)  in blk_exit_queue()  argument
740 	if (q->elevator) {  in blk_exit_queue()
741 		ioc_clear_queue(q);  in blk_exit_queue()
742 		__elevator_exit(q, q->elevator);  in blk_exit_queue()
746 	 * Remove all references to @q from the block cgroup controller before  in blk_exit_queue()
747 	 * restoring @q->queue_lock to avoid that restoring this pointer causes  in blk_exit_queue()
750 	blkcg_exit_queue(q);  in blk_exit_queue()
753 	 * Since the cgroup code may dereference the @q->backing_dev_info  in blk_exit_queue()
757 	bdi_put(q->backing_dev_info);  in blk_exit_queue()
782 	struct request_queue *q =  in blk_release_queue()  local
787 	if (test_bit(QUEUE_FLAG_POLL_STATS, &q->queue_flags))  in blk_release_queue()
788 		blk_stat_remove_callback(q, q->poll_cb);  in blk_release_queue()
789 	blk_stat_free_callback(q->poll_cb);  in blk_release_queue()
791 	blk_free_queue_stats(q->stats);  in blk_release_queue()
793 	if (queue_is_mq(q)) {  in blk_release_queue()
797 		cancel_delayed_work_sync(&q->requeue_work);  in blk_release_queue()
799 		queue_for_each_hw_ctx(q, hctx, i)  in blk_release_queue()
803 	blk_exit_queue(q);  in blk_release_queue()
805 	blk_queue_free_zone_bitmaps(q);  in blk_release_queue()
807 	if (queue_is_mq(q))  in blk_release_queue()
808 		blk_mq_release(q);  in blk_release_queue()
810 	blk_trace_shutdown(q);  in blk_release_queue()
811 	mutex_lock(&q->debugfs_mutex);  in blk_release_queue()
812 	debugfs_remove_recursive(q->debugfs_dir);  in blk_release_queue()
813 	mutex_unlock(&q->debugfs_mutex);  in blk_release_queue()
815 	if (queue_is_mq(q))  in blk_release_queue()
816 		blk_mq_debugfs_unregister(q);  in blk_release_queue()
818 	bioset_exit(&q->bio_split);  in blk_release_queue()
820 	ida_simple_remove(&blk_queue_ida, q->id);  in blk_release_queue()
821 	call_rcu(&q->rcu_head, blk_free_queue_rcu);  in blk_release_queue()
842 	struct request_queue *q = disk->queue;  in blk_register_queue()  local
844 	if (WARN_ON(!q))  in blk_register_queue()
847 	WARN_ONCE(blk_queue_registered(q),  in blk_register_queue()
860 	if (!blk_queue_init_done(q)) {  in blk_register_queue()
861 		blk_queue_flag_set(QUEUE_FLAG_INIT_DONE, q);  in blk_register_queue()
862 		percpu_ref_switch_to_percpu(&q->q_usage_counter);  in blk_register_queue()
865 	blk_queue_update_readahead(q);  in blk_register_queue()
871 	mutex_lock(&q->sysfs_dir_lock);  in blk_register_queue()
873 	ret = kobject_add(&q->kobj, kobject_get(&dev->kobj), "%s", "queue");  in blk_register_queue()
879 	ret = sysfs_create_group(&q->kobj, &queue_attr_group);  in blk_register_queue()
882 		kobject_del(&q->kobj);  in blk_register_queue()
887 	mutex_lock(&q->debugfs_mutex);  in blk_register_queue()
888 	q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent),  in blk_register_queue()
890 	mutex_unlock(&q->debugfs_mutex);  in blk_register_queue()
892 	if (queue_is_mq(q)) {  in blk_register_queue()
893 		__blk_mq_register_dev(dev, q);  in blk_register_queue()
894 		blk_mq_debugfs_register(q);  in blk_register_queue()
897 	mutex_lock(&q->sysfs_lock);  in blk_register_queue()
898 	if (q->elevator) {  in blk_register_queue()
899 		ret = elv_register_queue(q, false);  in blk_register_queue()
901 			mutex_unlock(&q->sysfs_lock);  in blk_register_queue()
902 			mutex_unlock(&q->sysfs_dir_lock);  in blk_register_queue()
903 			kobject_del(&q->kobj);  in blk_register_queue()
910 	blk_queue_flag_set(QUEUE_FLAG_REGISTERED, q);  in blk_register_queue()
911 	wbt_enable_default(q);  in blk_register_queue()
912 	blk_throtl_register_queue(q);  in blk_register_queue()
915 	kobject_uevent(&q->kobj, KOBJ_ADD);  in blk_register_queue()
916 	if (q->elevator)  in blk_register_queue()
917 		kobject_uevent(&q->elevator->kobj, KOBJ_ADD);  in blk_register_queue()
918 	mutex_unlock(&q->sysfs_lock);  in blk_register_queue()
922 	mutex_unlock(&q->sysfs_dir_lock);  in blk_register_queue()
936 	struct request_queue *q = disk->queue;  in blk_unregister_queue()  local
938 	if (WARN_ON(!q))  in blk_unregister_queue()
942 	if (!blk_queue_registered(q))  in blk_unregister_queue()
950 	mutex_lock(&q->sysfs_lock);  in blk_unregister_queue()
951 	blk_queue_flag_clear(QUEUE_FLAG_REGISTERED, q);  in blk_unregister_queue()
952 	mutex_unlock(&q->sysfs_lock);  in blk_unregister_queue()
954 	mutex_lock(&q->sysfs_dir_lock);  in blk_unregister_queue()
959 	if (queue_is_mq(q))  in blk_unregister_queue()
960 		blk_mq_unregister_dev(disk_to_dev(disk), q);  in blk_unregister_queue()
962 	kobject_uevent(&q->kobj, KOBJ_REMOVE);  in blk_unregister_queue()
963 	kobject_del(&q->kobj);  in blk_unregister_queue()
966 	mutex_lock(&q->sysfs_lock);  in blk_unregister_queue()
967 	if (q->elevator)  in blk_unregister_queue()
968 		elv_unregister_queue(q);  in blk_unregister_queue()
969 	mutex_unlock(&q->sysfs_lock);  in blk_unregister_queue()
970 	mutex_unlock(&q->sysfs_dir_lock);  in blk_unregister_queue()