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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