query.h

 1/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR MIT */
 2/*
 3 * Header file for the io_uring query interface.
 4 */
 5#ifndef LINUX_IO_URING_QUERY_H
 6#define LINUX_IO_URING_QUERY_H
 7
 8#include <linux/types.h>
 9
10struct io_uring_query_hdr {
11	__u64 next_entry;
12	__u64 query_data;
13	__u32 query_op;
14	__u32 size;
15	__s32 result;
16	__u32 __resv[3];
17};
18
19enum {
20	IO_URING_QUERY_OPCODES			= 0,
21	IO_URING_QUERY_ZCRX			= 1,
22	IO_URING_QUERY_SCQ			= 2,
23
24	__IO_URING_QUERY_MAX,
25};
26
27/* Doesn't require a ring */
28struct io_uring_query_opcode {
29	/* The number of supported IORING_OP_* opcodes */
30	__u32	nr_request_opcodes;
31	/* The number of supported IORING_[UN]REGISTER_* opcodes */
32	__u32	nr_register_opcodes;
33	/* Bitmask of all supported IORING_FEAT_* flags */
34	__u64	feature_flags;
35	/* Bitmask of all supported IORING_SETUP_* flags */
36	__u64	ring_setup_flags;
37	/* Bitmask of all supported IORING_ENTER_** flags */
38	__u64	enter_flags;
39	/* Bitmask of all supported IOSQE_* flags */
40	__u64	sqe_flags;
41	/* The number of available query opcodes */
42	__u32	nr_query_opcodes;
43	__u32	__pad;
44};
45
46struct io_uring_query_zcrx {
47	/* Bitmask of supported ZCRX_REG_* flags, */
48	__u64 register_flags;
49	/* Bitmask of all supported IORING_ZCRX_AREA_* flags */
50	__u64 area_flags;
51	/* The number of supported ZCRX_CTRL_* opcodes */
52	__u32 nr_ctrl_opcodes;
53	__u32 __resv1;
54	/* The refill ring header size */
55	__u32 rq_hdr_size;
56	/* The alignment for the header */
57	__u32 rq_hdr_alignment;
58	__u64 __resv2;
59};
60
61struct io_uring_query_scq {
62	/* The SQ/CQ rings header size */
63	__u64 hdr_size;
64	/* The alignment for the header */
65	__u64 hdr_alignment;
66};
67
68#endif