47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define IO_POLL_ALLOC_CACHE_MAX 32
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enum {
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IO_APOLL_OK,
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IO_APOLL_ABORTED,
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IO_APOLL_READY
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};
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struct io_poll {
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struct file *file;
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struct wait_queue_head *head;
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__poll_t events;
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int retries;
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struct wait_queue_entry wait;
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};
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struct async_poll {
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struct io_poll poll;
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struct io_poll *double_poll;
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};
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/*
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* Must only be called inside issue_flags & IO_URING_F_MULTISHOT, or
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* potentially other cases where we already "own" this poll request.
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*/
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static inline void io_poll_multishot_retry(struct io_kiocb *req)
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{
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atomic_inc(&req->poll_refs);
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}
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int io_poll_add_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
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int io_poll_add(struct io_kiocb *req, unsigned int issue_flags);
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int io_poll_remove_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
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int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags);
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struct io_cancel_data;
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int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
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unsigned issue_flags);
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int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags);
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bool io_poll_remove_all(struct io_ring_ctx *ctx, struct task_struct *tsk,
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bool cancel_all);
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void io_poll_task_func(struct io_kiocb *req, struct io_tw_state *ts);
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