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 
7 struct io_cancel_data {
8 	struct io_ring_ctx *ctx;
9 	union {
10 		u64 data;
11 		struct file *file;
12 	};
13 	u8 opcode;
14 	u32 flags;
15 	int seq;
16 };
17 
18 int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
19 int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags);
20 
21 int io_try_cancel(struct io_uring_task *tctx, struct io_cancel_data *cd,
22 		  unsigned int issue_flags);
23 void init_hash_table(struct io_hash_table *table, unsigned size);
24 
25 int io_sync_cancel(struct io_ring_ctx *ctx, void __user *arg);
26 bool io_cancel_req_match(struct io_kiocb *req, struct io_cancel_data *cd);
27 
io_cancel_match_sequence(struct io_kiocb * req,int sequence)28 static inline bool io_cancel_match_sequence(struct io_kiocb *req, int sequence)
29 {
30 	if (req->cancel_seq_set && sequence == req->work.cancel_seq)
31 		return true;
32 
33 	req->cancel_seq_set = true;
34 	req->work.cancel_seq = sequence;
35 	return false;
36 }
37 
38 #endif
39