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Jens Axboe771b53d02019-10-22 10:25:58 -06001#ifndef INTERNAL_IO_WQ_H
2#define INTERNAL_IO_WQ_H
3
4struct io_wq;
5
6enum {
7 IO_WQ_WORK_CANCEL = 1,
8 IO_WQ_WORK_HAS_MM = 2,
9 IO_WQ_WORK_HASHED = 4,
10 IO_WQ_WORK_NEEDS_USER = 8,
Jens Axboefcb323c2019-10-24 12:39:47 -060011 IO_WQ_WORK_NEEDS_FILES = 16,
Jens Axboe771b53d02019-10-22 10:25:58 -060012
13 IO_WQ_HASH_SHIFT = 24, /* upper 8 bits are used for hash key */
14};
15
16enum io_wq_cancel {
17 IO_WQ_CANCEL_OK, /* cancelled before started */
18 IO_WQ_CANCEL_RUNNING, /* found, running, and attempted cancelled */
19 IO_WQ_CANCEL_NOTFOUND, /* work not found */
20};
21
22struct io_wq_work {
23 struct list_head list;
24 void (*func)(struct io_wq_work **);
25 unsigned flags;
Jens Axboefcb323c2019-10-24 12:39:47 -060026 struct files_struct *files;
Jens Axboe771b53d02019-10-22 10:25:58 -060027};
28
29#define INIT_IO_WORK(work, _func) \
30 do { \
31 (work)->func = _func; \
32 (work)->flags = 0; \
Jens Axboefcb323c2019-10-24 12:39:47 -060033 (work)->files = NULL; \
Jens Axboe771b53d02019-10-22 10:25:58 -060034 } while (0) \
35
36struct io_wq *io_wq_create(unsigned concurrency, struct mm_struct *mm);
37void io_wq_destroy(struct io_wq *wq);
38
39void io_wq_enqueue(struct io_wq *wq, struct io_wq_work *work);
40void io_wq_enqueue_hashed(struct io_wq *wq, struct io_wq_work *work, void *val);
41void io_wq_flush(struct io_wq *wq);
42
43void io_wq_cancel_all(struct io_wq *wq);
44enum io_wq_cancel io_wq_cancel_work(struct io_wq *wq, struct io_wq_work *cwork);
45
46#if defined(CONFIG_IO_WQ)
47extern void io_wq_worker_sleeping(struct task_struct *);
48extern void io_wq_worker_running(struct task_struct *);
49#else
50static inline void io_wq_worker_sleeping(struct task_struct *tsk)
51{
52}
53static inline void io_wq_worker_running(struct task_struct *tsk)
54{
55}
56#endif
57
58#endif