1 #ifndef INTERNAL_IO_WQ_H
2 #define INTERNAL_IO_WQ_H
10 IO_WQ_WORK_NEEDS_FILES = 16,
11 IO_WQ_WORK_UNBOUND = 32,
12 IO_WQ_WORK_INTERNAL = 64,
14 IO_WQ_WORK_NO_CANCEL = 256,
15 IO_WQ_WORK_CONCURRENT = 512,
17 IO_WQ_HASH_SHIFT = 24, /* upper 8 bits are used for hash key */
21 IO_WQ_CANCEL_OK, /* cancelled before started */
22 IO_WQ_CANCEL_RUNNING, /* found, running, and attempted cancelled */
23 IO_WQ_CANCEL_NOTFOUND, /* work not found */
26 struct io_wq_work_node {
27 struct io_wq_work_node *next;
30 struct io_wq_work_list {
31 struct io_wq_work_node *first;
32 struct io_wq_work_node *last;
35 static inline void wq_list_add_tail(struct io_wq_work_node *node,
36 struct io_wq_work_list *list)
40 WRITE_ONCE(list->first, node);
42 list->last->next = node;
47 static inline void wq_node_del(struct io_wq_work_list *list,
48 struct io_wq_work_node *node,
49 struct io_wq_work_node *prev)
51 if (node == list->first)
52 WRITE_ONCE(list->first, node->next);
53 if (node == list->last)
56 prev->next = node->next;
60 #define wq_list_for_each(pos, prv, head) \
61 for (pos = (head)->first, prv = NULL; pos; prv = pos, pos = (pos)->next)
63 #define wq_list_empty(list) (READ_ONCE((list)->first) == NULL)
64 #define INIT_WQ_LIST(list) do { \
65 (list)->first = NULL; \
66 (list)->last = NULL; \
71 struct io_wq_work_node list;
74 void (*func)(struct io_wq_work **);
75 struct files_struct *files;
77 const struct cred *creds;
81 #define INIT_IO_WORK(work, _func) \
83 (work)->list.next = NULL; \
84 (work)->func = _func; \
86 (work)->files = NULL; \
88 (work)->creds = NULL; \
91 typedef void (get_work_fn)(struct io_wq_work *);
92 typedef void (put_work_fn)(struct io_wq_work *);
95 struct user_struct *user;
97 get_work_fn *get_work;
98 put_work_fn *put_work;
101 struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data);
102 void io_wq_destroy(struct io_wq *wq);
104 void io_wq_enqueue(struct io_wq *wq, struct io_wq_work *work);
105 void io_wq_enqueue_hashed(struct io_wq *wq, struct io_wq_work *work, void *val);
106 void io_wq_flush(struct io_wq *wq);
108 void io_wq_cancel_all(struct io_wq *wq);
109 enum io_wq_cancel io_wq_cancel_work(struct io_wq *wq, struct io_wq_work *cwork);
111 typedef bool (work_cancel_fn)(struct io_wq_work *, void *);
113 enum io_wq_cancel io_wq_cancel_cb(struct io_wq *wq, work_cancel_fn *cancel,
116 #if defined(CONFIG_IO_WQ)
117 extern void io_wq_worker_sleeping(struct task_struct *);
118 extern void io_wq_worker_running(struct task_struct *);
120 static inline void io_wq_worker_sleeping(struct task_struct *tsk)
123 static inline void io_wq_worker_running(struct task_struct *tsk)
128 static inline bool io_wq_current_is_worker(void)
130 return in_task() && (current->flags & PF_IO_WORKER);