CasperSecurity
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Linux Security Modules (LSM) - User space API
*
* Copyright (C) 2022 Casey Schaufler <casey@schaufler-ca.com>
* Copyright (C) 2022 Intel Corporation
*/
#ifndef _LINUX_LSM_H
#define _LINUX_LSM_H
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/unistd.h>
/**
* struct lsm_ctx - LSM context information
* @id: the LSM id number, see LSM_ID_XXX
* @flags: LSM specific flags
* @len: length of the lsm_ctx struct, @ctx and any other data or padding
* @ctx_len: the size of @ctx
* @ctx: the LSM context value
*
* The @len field MUST be equal to the size of the lsm_ctx struct
* plus any additional padding and/or data placed after @ctx.
*
* In all cases @ctx_len MUST be equal to the length of @ctx.
* If @ctx is a string value it should be nul terminated with
* @ctx_len equal to `strlen(@ctx) + 1`. Binary values are
* supported.
*
* The @flags and @ctx fields SHOULD only be interpreted by the
* LSM specified by @id; they MUST be set to zero/0 when not used.
*/
struct lsm_ctx {
__u64 id;
__u64 flags;
__u64 len;
__u64 ctx_len;
__u8 ctx[] __counted_by(ctx_len);
};
/*
* ID tokens to identify Linux Security Modules (LSMs)
*
* These token values are used to uniquely identify specific LSMs
* in the kernel as well as in the kernel's LSM userspace API.
*
* A value of zero/0 is considered undefined and should not be used
* outside the kernel. Values 1-99 are reserved for potential
* future use.
*/
#define LSM_ID_UNDEF 0
#define LSM_ID_CAPABILITY 100
#define LSM_ID_SELINUX 101
#define LSM_ID_SMACK 102
#define LSM_ID_TOMOYO 103
#define LSM_ID_APPARMOR 104
#define LSM_ID_YAMA 105
#define LSM_ID_LOADPIN 106
#define LSM_ID_SAFESETID 107
#define LSM_ID_LOCKDOWN 108
#define LSM_ID_BPF 109
#define LSM_ID_LANDLOCK 110
/*
* LSM_ATTR_XXX definitions identify different LSM attributes
* which are used in the kernel's LSM userspace API. Support
* for these attributes vary across the different LSMs. None
* are required.
*
* A value of zero/0 is considered undefined and should not be used
* outside the kernel. Values 1-99 are reserved for potential
* future use.
*/
#define LSM_ATTR_UNDEF 0
#define LSM_ATTR_CURRENT 100
#define LSM_ATTR_EXEC 101
#define LSM_ATTR_FSCREATE 102
#define LSM_ATTR_KEYCREATE 103
#define LSM_ATTR_PREV 104
#define LSM_ATTR_SOCKCREATE 105
/*
* LSM_FLAG_XXX definitions identify special handling instructions
* for the API.
*/
#define LSM_FLAG_SINGLE 0x0001
#endif /* _LINUX_LSM_H */