opdef.h

 1// SPDX-License-Identifier: GPL-2.0
 2#ifndef IOU_OP_DEF_H
 3#define IOU_OP_DEF_H
 4
 5struct io_issue_def {
 6	/* needs req->file assigned */
 7	unsigned		needs_file : 1;
 8	/* should block plug */
 9	unsigned		plug : 1;
10	/* supports ioprio */
11	unsigned		ioprio : 1;
12	/* supports iopoll */
13	unsigned		iopoll : 1;
14	/* op supports buffer selection */
15	unsigned		buffer_select : 1;
16	/* hash wq insertion if file is a regular file */
17	unsigned		hash_reg_file : 1;
18	/* unbound wq insertion if file is a non-regular file */
19	unsigned		unbound_nonreg_file : 1;
20	/* set if opcode supports polled "wait" */
21	unsigned		pollin : 1;
22	unsigned		pollout : 1;
23	unsigned		poll_exclusive : 1;
24	/* skip auditing */
25	unsigned		audit_skip : 1;
26	/* have to be put into the iopoll list */
27	unsigned		iopoll_queue : 1;
28	/* vectored opcode, set if 1) vectored, and 2) handler needs to know */
29	unsigned		vectored : 1;
30	/* set to 1 if this opcode uses 128b sqes in a mixed sq */
31	unsigned		is_128 : 1;
32
33	/* size of async data needed, if any */
34	unsigned short		async_size;
35
36	int (*issue)(struct io_kiocb *, unsigned int);
37	int (*prep)(struct io_kiocb *, const struct io_uring_sqe *);
38};
39
40struct io_cold_def {
41	const char		*name;
42
43	void (*sqe_copy)(struct io_kiocb *);
44	void (*cleanup)(struct io_kiocb *);
45	void (*fail)(struct io_kiocb *);
46};
47
48extern const struct io_issue_def io_issue_defs[];
49extern const struct io_cold_def io_cold_defs[];
50
51bool io_uring_op_supported(u8 opcode);
52
53void io_uring_optable_init(void);
54#endif