1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * Linux Security Modules (LSM) - User space API
4 *
5 * Copyright (C) 2022 Casey Schaufler <casey@schaufler-ca.com>
6 * Copyright (C) 2022 Intel Corporation
7 */
8
9#ifndef _UAPI_LINUX_LSM_H
10#define _UAPI_LINUX_LSM_H
11
12#include <linux/stddef.h>
13#include <linux/types.h>
14#include <linux/unistd.h>
15
16/**
17 * struct lsm_ctx - LSM context information
18 * @id: the LSM id number, see LSM_ID_XXX
19 * @flags: LSM specific flags
20 * @len: length of the lsm_ctx struct, @ctx and any other data or padding
21 * @ctx_len: the size of @ctx
22 * @ctx: the LSM context value
23 *
24 * The @len field MUST be equal to the size of the lsm_ctx struct
25 * plus any additional padding and/or data placed after @ctx.
26 *
27 * In all cases @ctx_len MUST be equal to the length of @ctx.
28 * If @ctx is a string value it should be nul terminated with
29 * @ctx_len equal to `strlen(@ctx) + 1`. Binary values are
30 * supported.
31 *
32 * The @flags and @ctx fields SHOULD only be interpreted by the
33 * LSM specified by @id; they MUST be set to zero/0 when not used.
34 */
35struct lsm_ctx {
36 __u64 id;
37 __u64 flags;
38 __u64 len;
39 __u64 ctx_len;
40 __u8 ctx[] __counted_by(ctx_len);
41};
42
43/*
44 * ID tokens to identify Linux Security Modules (LSMs)
45 *
46 * These token values are used to uniquely identify specific LSMs
47 * in the kernel as well as in the kernel's LSM userspace API.
48 *
49 * A value of zero/0 is considered undefined and should not be used
50 * outside the kernel. Values 1-99 are reserved for potential
51 * future use.
52 */
53#define LSM_ID_UNDEF 0
54#define LSM_ID_CAPABILITY 100
55#define LSM_ID_SELINUX 101
56#define LSM_ID_SMACK 102
57#define LSM_ID_TOMOYO 103
58#define LSM_ID_APPARMOR 104
59#define LSM_ID_YAMA 105
60#define LSM_ID_LOADPIN 106
61#define LSM_ID_SAFESETID 107
62#define LSM_ID_LOCKDOWN 108
63#define LSM_ID_BPF 109
64#define LSM_ID_LANDLOCK 110
65#define LSM_ID_IMA 111
66#define LSM_ID_EVM 112
67#define LSM_ID_IPE 113
68
69/*
70 * LSM_ATTR_XXX definitions identify different LSM attributes
71 * which are used in the kernel's LSM userspace API. Support
72 * for these attributes vary across the different LSMs. None
73 * are required.
74 *
75 * A value of zero/0 is considered undefined and should not be used
76 * outside the kernel. Values 1-99 are reserved for potential
77 * future use.
78 */
79#define LSM_ATTR_UNDEF 0
80#define LSM_ATTR_CURRENT 100
81#define LSM_ATTR_EXEC 101
82#define LSM_ATTR_FSCREATE 102
83#define LSM_ATTR_KEYCREATE 103
84#define LSM_ATTR_PREV 104
85#define LSM_ATTR_SOCKCREATE 105
86
87/*
88 * LSM_FLAG_XXX definitions identify special handling instructions
89 * for the API.
90 */
91#define LSM_FLAG_SINGLE 0x0001
92
93#endif /* _UAPI_LINUX_LSM_H */
94