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 	struct wait_queue_entry		wait;
16 };
17 
18 struct async_poll {
19 	union {
20 		struct io_poll		poll;
21 		struct io_cache_entry	cache;
22 	};
23 	struct io_poll		*double_poll;
24 };
25 
26 int io_poll_add_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
27 int io_poll_add(struct io_kiocb *req, unsigned int issue_flags);
28 
29 int io_poll_remove_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
30 int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags);
31 
32 struct io_cancel_data;
33 int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
34 		   unsigned issue_flags);
35 int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags);
36 bool io_poll_remove_all(struct io_ring_ctx *ctx, struct task_struct *tsk,
37 			bool cancel_all);
38 
39 void io_apoll_cache_free(struct io_cache_entry *entry);
40