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