Release 4.9 block/blk-mq-tag.h
#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 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_ctx *ctx,
unsigned int tag);
extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags);
extern ssize_t blk_mq_tag_sysfs_show(struct blk_mq_tags *tags, char *page);
extern int blk_mq_tag_update_depth(struct blk_mq_tags *tags, unsigned int depth);
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 | omar sandoval | 44 | 100.00% | 1 | 100.00% |
| Total | 44 | 100.00% | 1 | 100.00% |
enum {
BLK_MQ_TAG_CACHE_MIN = 1,
BLK_MQ_TAG_CACHE_MAX = 64,
};
enum {
BLK_MQ_TAG_FAIL = -1U,
BLK_MQ_TAG_MIN = BLK_MQ_TAG_CACHE_MIN,
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 | 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 | 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 | ming lei | 32 | 100.00% | 1 | 100.00% |
| Total | 32 | 100.00% | 1 | 100.00% |
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jens axboe | jens axboe | 226 | 62.95% | 6 | 46.15% |
| omar sandoval | omar sandoval | 51 | 14.21% | 2 | 15.38% |
| christoph hellwig | christoph hellwig | 44 | 12.26% | 2 | 15.38% |
| ming lei | ming lei | 33 | 9.19% | 1 | 7.69% |
| shaohua li | shaohua li | 3 | 0.84% | 1 | 7.69% |
| lei ming | lei ming | 2 | 0.56% | 1 | 7.69% |
| Total | 359 | 100.00% | 13 | 100.00% |