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Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: GPL-2.0
2
3#define IO_POLL_ALLOC_CACHE_MAX 32
4
5enum {
6 IO_APOLL_OK,
7 IO_APOLL_ABORTED,
8 IO_APOLL_READY
9};
10
11struct 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
19struct async_poll {
20 struct io_poll poll;
21 struct io_poll *double_poll;
22};
23
24/*
25 * Must only be called inside issue_flags & IO_URING_F_MULTISHOT, or
26 * potentially other cases where we already "own" this poll request.
27 */
28static inline void io_poll_multishot_retry(struct io_kiocb *req)
29{
30 atomic_inc(&req->poll_refs);
31}
32
33int io_poll_add_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
34int io_poll_add(struct io_kiocb *req, unsigned int issue_flags);
35
36int io_poll_remove_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
37int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags);
38
39struct io_cancel_data;
40int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
41 unsigned issue_flags);
42int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags);
43bool io_poll_remove_all(struct io_ring_ctx *ctx, struct io_uring_task *tctx,
44 bool cancel_all);
45
46void io_poll_task_func(struct io_kiocb *req, struct io_tw_state *ts);