cancel.h

 1// SPDX-License-Identifier: GPL-2.0
 2#ifndef IORING_CANCEL_H
 3#define IORING_CANCEL_H
 4
 5#include <linux/io_uring_types.h>
 6
 7struct io_cancel_data {
 8	struct io_ring_ctx *ctx;
 9	u64 data;
10	struct file *file;
11	u8 opcode;
12	u32 flags;
13	int seq;
14};
15
16int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
17int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags);
18
19int io_try_cancel(struct io_uring_task *tctx, struct io_cancel_data *cd,
20		  unsigned int issue_flags);
21
22int io_sync_cancel(struct io_ring_ctx *ctx, void __user *arg);
23bool io_cancel_req_match(struct io_kiocb *req, struct io_cancel_data *cd);
24bool io_match_task_safe(struct io_kiocb *head, struct io_uring_task *tctx,
25			bool cancel_all);
26
27bool io_cancel_remove_all(struct io_ring_ctx *ctx, struct io_uring_task *tctx,
28			  struct hlist_head *list, bool cancel_all,
29			  bool (*cancel)(struct io_kiocb *));
30int io_cancel_remove(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
31		     unsigned int issue_flags, struct hlist_head *list,
32		     bool (*cancel)(struct io_kiocb *));
33__cold bool io_uring_try_cancel_requests(struct io_ring_ctx *ctx,
34					 struct io_uring_task *tctx,
35					 bool cancel_all, bool is_sqpoll_thread);
36__cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd);
37__cold bool io_cancel_ctx_cb(struct io_wq_work *work, void *data);
38
39static inline bool io_cancel_match_sequence(struct io_kiocb *req, int sequence)
40{
41	if (req->cancel_seq_set && sequence == req->work.cancel_seq)
42		return true;
43
44	req->cancel_seq_set = true;
45	req->work.cancel_seq = sequence;
46	return false;
47}
48
49#endif