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