1 #ifndef INTERNAL_IO_WQ_H
2 #define INTERNAL_IO_WQ_H
9 IO_WQ_WORK_UNBOUND = 32,
10 IO_WQ_WORK_NO_CANCEL = 256,
11 IO_WQ_WORK_CONCURRENT = 512,
13 IO_WQ_HASH_SHIFT = 24, /* upper 8 bits are used for hash key */
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 */
22 struct io_wq_work_node {
23 struct io_wq_work_node *next;
26 struct io_wq_work_list {
27 struct io_wq_work_node *first;
28 struct io_wq_work_node *last;
31 static inline void wq_list_add_after(struct io_wq_work_node *node,
32 struct io_wq_work_node *pos,
33 struct io_wq_work_list *list)
35 struct io_wq_work_node *next = pos->next;
43 static inline void wq_list_add_tail(struct io_wq_work_node *node,
44 struct io_wq_work_list *list)
48 WRITE_ONCE(list->first, node);
50 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 void (*func)(struct io_wq_work **);
89 struct files_struct *files;
91 const struct cred *creds;
97 #define INIT_IO_WORK(work, _func) \
99 *(work) = (struct io_wq_work){ .func = _func }; \
102 static inline struct io_wq_work *wq_next_work(struct io_wq_work *work)
104 if (!work->list.next)
107 return container_of(work->list.next, struct io_wq_work, list);
110 typedef void (free_work_fn)(struct io_wq_work *);
113 struct user_struct *user;
115 free_work_fn *free_work;
118 struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data);
119 bool io_wq_get(struct io_wq *wq, struct io_wq_data *data);
120 void io_wq_destroy(struct io_wq *wq);
122 void io_wq_enqueue(struct io_wq *wq, struct io_wq_work *work);
123 void io_wq_hash_work(struct io_wq_work *work, void *val);
125 static inline bool io_wq_is_hashed(struct io_wq_work *work)
127 return work->flags & IO_WQ_WORK_HASHED;
130 void io_wq_cancel_all(struct io_wq *wq);
131 enum io_wq_cancel io_wq_cancel_work(struct io_wq *wq, struct io_wq_work *cwork);
132 enum io_wq_cancel io_wq_cancel_pid(struct io_wq *wq, pid_t pid);
134 typedef bool (work_cancel_fn)(struct io_wq_work *, void *);
136 enum io_wq_cancel io_wq_cancel_cb(struct io_wq *wq, work_cancel_fn *cancel,
139 struct task_struct *io_wq_get_task(struct io_wq *wq);
141 #if defined(CONFIG_IO_WQ)
142 extern void io_wq_worker_sleeping(struct task_struct *);
143 extern void io_wq_worker_running(struct task_struct *);
145 static inline void io_wq_worker_sleeping(struct task_struct *tsk)
148 static inline void io_wq_worker_running(struct task_struct *tsk)
153 static inline bool io_wq_current_is_worker(void)
155 return in_task() && (current->flags & PF_IO_WORKER);