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Release 4.16 block/blk-mq-tag.h

Directory: block
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef INT_BLK_MQ_TAG_H

#define INT_BLK_MQ_TAG_H

#include "blk-mq.h"

/*
 * Tag address space map.
 */

struct blk_mq_tags {
	
unsigned int nr_tags;
	
unsigned int nr_reserved_tags;

	
atomic_t active_queues;

	
struct sbitmap_queue bitmap_tags;
	
struct sbitmap_queue breserved_tags;

	
struct request **rqs;
	
struct request **static_rqs;
	
struct list_head page_list;
};


extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, unsigned int reserved_tags, int node, int alloc_policy);
extern void blk_mq_free_tags(struct blk_mq_tags *tags);

extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
extern void blk_mq_put_tag(struct blk_mq_hw_ctx *hctx, struct blk_mq_tags *tags,
			   struct blk_mq_ctx *ctx, unsigned int tag);
extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags);
extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
					struct blk_mq_tags **tags,
					unsigned int depth, bool can_grow);
extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
		void *priv);


static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt, struct blk_mq_hw_ctx *hctx) { if (!hctx) return &bt->ws[0]; return sbq_wait_ptr(bt, &hctx->wait_index); }

Contributors

PersonTokensPropCommitsCommitProp
Omar Sandoval44100.00%1100.00%
Total44100.00%1100.00%

enum { BLK_MQ_TAG_FAIL = -1U, BLK_MQ_TAG_MIN = 1, BLK_MQ_TAG_MAX = BLK_MQ_TAG_FAIL - 1, }; extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *); extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx) { if (!(hctx->flags & BLK_MQ_F_TAG_SHARED)) return false; return __blk_mq_tag_busy(hctx); }

Contributors

PersonTokensPropCommitsCommitProp
Jens Axboe32100.00%1100.00%
Total32100.00%1100.00%


static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx) { if (!(hctx->flags & BLK_MQ_F_TAG_SHARED)) return; __blk_mq_tag_idle(hctx); }

Contributors

PersonTokensPropCommitsCommitProp
Jens Axboe29100.00%1100.00%
Total29100.00%1100.00%

/* * This helper should only be used for flush request to share tag * with the request cloned from, and both the two requests can't be * in flight at the same time. The caller has to make sure the tag * can't be freed. */
static inline void blk_mq_tag_set_rq(struct blk_mq_hw_ctx *hctx, unsigned int tag, struct request *rq) { hctx->tags->rqs[tag] = rq; }

Contributors

PersonTokensPropCommitsCommitProp
Ming Lei32100.00%1100.00%
Total32100.00%1100.00%


static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags, unsigned int tag) { return tag < tags->nr_reserved_tags; }

Contributors

PersonTokensPropCommitsCommitProp
Sagi Grimberg23100.00%1100.00%
Total23100.00%1100.00%

#endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Jens Axboe22158.47%1052.63%
Omar Sandoval5113.49%210.53%
Christoph Hellwig4411.64%210.53%
Ming Lei338.73%15.26%
Sagi Grimberg236.08%15.26%
Shaohua Li30.79%15.26%
Lei Ming20.53%15.26%
Greg Kroah-Hartman10.26%15.26%
Linus Torvalds0.00%00.00%
Total378100.00%19100.00%
Directory: block
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