1 #ifndef INTERNAL_IO_WQ_H
2 #define INTERNAL_IO_WQ_H
4 #include <linux/io_uring.h>
10 IO_WQ_WORK_HASHED = 2,
11 IO_WQ_WORK_UNBOUND = 4,
12 IO_WQ_WORK_CONCURRENT = 16,
14 IO_WQ_WORK_FILES = 32,
17 IO_WQ_WORK_CREDS = 256,
18 IO_WQ_WORK_BLKCG = 512,
19 IO_WQ_WORK_FSIZE = 1024,
21 IO_WQ_HASH_SHIFT = 24, /* upper 8 bits are used for hash key */
25 IO_WQ_CANCEL_OK, /* cancelled before started */
26 IO_WQ_CANCEL_RUNNING, /* found, running, and attempted cancelled */
27 IO_WQ_CANCEL_NOTFOUND, /* work not found */
30 static inline void wq_list_add_after(struct io_wq_work_node *node,
31 struct io_wq_work_node *pos,
32 struct io_wq_work_list *list)
34 struct io_wq_work_node *next = pos->next;
42 static inline void wq_list_add_tail(struct io_wq_work_node *node,
43 struct io_wq_work_list *list)
47 WRITE_ONCE(list->first, node);
49 list->last->next = node;
55 static inline void wq_list_cut(struct io_wq_work_list *list,
56 struct io_wq_work_node *last,
57 struct io_wq_work_node *prev)
59 /* first in the list, if prev==NULL */
61 WRITE_ONCE(list->first, last->next);
63 prev->next = last->next;
65 if (last == list->last)
70 static inline void wq_list_del(struct io_wq_work_list *list,
71 struct io_wq_work_node *node,
72 struct io_wq_work_node *prev)
74 wq_list_cut(list, node, prev);
77 #define wq_list_for_each(pos, prv, head) \
78 for (pos = (head)->first, prv = NULL; pos; prv = pos, pos = (pos)->next)
80 #define wq_list_empty(list) (READ_ONCE((list)->first) == NULL)
81 #define INIT_WQ_LIST(list) do { \
82 (list)->first = NULL; \
83 (list)->last = NULL; \
87 struct io_wq_work_node list;
88 struct io_identity *identity;
92 static inline struct io_wq_work *wq_next_work(struct io_wq_work *work)
97 return container_of(work->list.next, struct io_wq_work, list);
100 typedef struct io_wq_work *(free_work_fn)(struct io_wq_work *);
101 typedef void (io_wq_work_fn)(struct io_wq_work *);
104 struct user_struct *user;
106 io_wq_work_fn *do_work;
107 free_work_fn *free_work;
110 struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data);
111 bool io_wq_get(struct io_wq *wq, struct io_wq_data *data);
112 void io_wq_destroy(struct io_wq *wq);
114 void io_wq_enqueue(struct io_wq *wq, struct io_wq_work *work);
115 void io_wq_hash_work(struct io_wq_work *work, void *val);
117 static inline bool io_wq_is_hashed(struct io_wq_work *work)
119 return work->flags & IO_WQ_WORK_HASHED;
122 typedef bool (work_cancel_fn)(struct io_wq_work *, void *);
124 enum io_wq_cancel io_wq_cancel_cb(struct io_wq *wq, work_cancel_fn *cancel,
125 void *data, bool cancel_all);
127 struct task_struct *io_wq_get_task(struct io_wq *wq);
129 #if defined(CONFIG_IO_WQ)
130 extern void io_wq_worker_sleeping(struct task_struct *);
131 extern void io_wq_worker_running(struct task_struct *);
133 static inline void io_wq_worker_sleeping(struct task_struct *tsk)
136 static inline void io_wq_worker_running(struct task_struct *tsk)
141 static inline bool io_wq_current_is_worker(void)
143 return in_task() && (current->flags & PF_IO_WORKER);