Release 4.16 block/blk-mq-tag.h
/* 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
Person | Tokens | Prop | Commits | CommitProp |
Omar Sandoval | 44 | 100.00% | 1 | 100.00% |
Total | 44 | 100.00% | 1 | 100.00% |
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
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 32 | 100.00% | 1 | 100.00% |
Total | 32 | 100.00% | 1 | 100.00% |
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
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 29 | 100.00% | 1 | 100.00% |
Total | 29 | 100.00% | 1 | 100.00% |
/*
* 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
Person | Tokens | Prop | Commits | CommitProp |
Ming Lei | 32 | 100.00% | 1 | 100.00% |
Total | 32 | 100.00% | 1 | 100.00% |
static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
unsigned int tag)
{
return tag < tags->nr_reserved_tags;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Sagi Grimberg | 23 | 100.00% | 1 | 100.00% |
Total | 23 | 100.00% | 1 | 100.00% |
#endif
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jens Axboe | 221 | 58.47% | 10 | 52.63% |
Omar Sandoval | 51 | 13.49% | 2 | 10.53% |
Christoph Hellwig | 44 | 11.64% | 2 | 10.53% |
Ming Lei | 33 | 8.73% | 1 | 5.26% |
Sagi Grimberg | 23 | 6.08% | 1 | 5.26% |
Shaohua Li | 3 | 0.79% | 1 | 5.26% |
Lei Ming | 2 | 0.53% | 1 | 5.26% |
Greg Kroah-Hartman | 1 | 0.26% | 1 | 5.26% |
Linus Torvalds | | 0.00% | 0 | 0.00% |
Total | 378 | 100.00% | 19 | 100.00% |
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