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git.proxmox.com Git - mirror_ubuntu-hirsute-kernel.git/blob - fs/io-wq.h
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_NO_CANCEL
= 8,
13 IO_WQ_WORK_CONCURRENT
= 16,
15 IO_WQ_WORK_FILES
= 32,
18 IO_WQ_WORK_CREDS
= 256,
19 IO_WQ_WORK_BLKCG
= 512,
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 struct io_wq_work_node
{
31 struct io_wq_work_node
*next
;
34 struct io_wq_work_list
{
35 struct io_wq_work_node
*first
;
36 struct io_wq_work_node
*last
;
39 static inline void wq_list_add_after(struct io_wq_work_node
*node
,
40 struct io_wq_work_node
*pos
,
41 struct io_wq_work_list
*list
)
43 struct io_wq_work_node
*next
= pos
->next
;
51 static inline void wq_list_add_tail(struct io_wq_work_node
*node
,
52 struct io_wq_work_list
*list
)
56 WRITE_ONCE(list
->first
, node
);
58 list
->last
->next
= node
;
63 static inline void wq_list_cut(struct io_wq_work_list
*list
,
64 struct io_wq_work_node
*last
,
65 struct io_wq_work_node
*prev
)
67 /* first in the list, if prev==NULL */
69 WRITE_ONCE(list
->first
, last
->next
);
71 prev
->next
= last
->next
;
73 if (last
== list
->last
)
78 static inline void wq_list_del(struct io_wq_work_list
*list
,
79 struct io_wq_work_node
*node
,
80 struct io_wq_work_node
*prev
)
82 wq_list_cut(list
, node
, prev
);
85 #define wq_list_for_each(pos, prv, head) \
86 for (pos = (head)->first, prv = NULL; pos; prv = pos, pos = (pos)->next)
88 #define wq_list_empty(list) (READ_ONCE((list)->first) == NULL)
89 #define INIT_WQ_LIST(list) do { \
90 (list)->first = NULL; \
91 (list)->last = NULL; \
95 struct io_wq_work_node list
;
96 struct io_identity
*identity
;
100 static inline struct io_wq_work
*wq_next_work(struct io_wq_work
*work
)
102 if (!work
->list
.next
)
105 return container_of(work
->list
.next
, struct io_wq_work
, list
);
108 typedef void (free_work_fn
)(struct io_wq_work
*);
109 typedef struct io_wq_work
*(io_wq_work_fn
)(struct io_wq_work
*);
112 struct user_struct
*user
;
114 io_wq_work_fn
*do_work
;
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
);
133 typedef bool (work_cancel_fn
)(struct io_wq_work
*, void *);
135 enum io_wq_cancel
io_wq_cancel_cb(struct io_wq
*wq
, work_cancel_fn
*cancel
,
136 void *data
, bool cancel_all
);
138 struct task_struct
*io_wq_get_task(struct io_wq
*wq
);
140 #if defined(CONFIG_IO_WQ)
141 extern void io_wq_worker_sleeping(struct task_struct
*);
142 extern void io_wq_worker_running(struct task_struct
*);
144 static inline void io_wq_worker_sleeping(struct task_struct
*tsk
)
147 static inline void io_wq_worker_running(struct task_struct
*tsk
)
152 static inline bool io_wq_current_is_worker(void)
154 return in_task() && (current
->flags
& PF_IO_WORKER
);