1 // SPDX-License-Identifier: GPL-2.0
2 
3 #include "alloc_cache.h"
4 
5 enum {
6 	IO_APOLL_OK,
7 	IO_APOLL_ABORTED,
8 	IO_APOLL_READY
9 };
10 
11 struct io_poll {
12 	struct file			*file;
13 	struct wait_queue_head		*head;
14 	__poll_t			events;
15 	int				retries;
16 	struct wait_queue_entry		wait;
17 };
18 
19 struct async_poll {
20 	union {
21 		struct io_poll		poll;
22 		struct io_cache_entry	cache;
23 	};
24 	struct io_poll		*double_poll;
25 };
26 
27 int io_poll_add_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
28 int io_poll_add(struct io_kiocb *req, unsigned int issue_flags);
29 
30 int io_poll_remove_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
31 int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags);
32 
33 struct io_cancel_data;
34 int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
35 		   unsigned issue_flags);
36 int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags);
37 bool io_poll_remove_all(struct io_ring_ctx *ctx, struct task_struct *tsk,
38 			bool cancel_all);
39 
40 void io_apoll_cache_free(struct io_cache_entry *entry);
41 
42 void io_poll_task_func(struct io_kiocb *req, struct io_tw_state *ts);
43