https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 6d796c50f84ca79f1722bb131799e5a5710c4700 authored by Linus Torvalds on 29 January 2023, 21:59:43 UTC
Linux 6.2-rc6
Linux 6.2-rc6
Tip revision: 6d796c5
constraint.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* A constraint is a condition that must be satisfied in
* order for one or more permissions to be granted.
* Constraints are used to impose additional restrictions
* beyond the type-based rules in `te' or the role-based
* transition rules in `rbac'. Constraints are typically
* used to prevent a process from transitioning to a new user
* identity or role unless it is in a privileged type.
* Constraints are likewise typically used to prevent a
* process from labeling an object with a different user
* identity.
*
* Author : Stephen Smalley, <sds@tycho.nsa.gov>
*/
#ifndef _SS_CONSTRAINT_H_
#define _SS_CONSTRAINT_H_
#include "ebitmap.h"
#define CEXPR_MAXDEPTH 5
struct constraint_expr {
#define CEXPR_NOT 1 /* not expr */
#define CEXPR_AND 2 /* expr and expr */
#define CEXPR_OR 3 /* expr or expr */
#define CEXPR_ATTR 4 /* attr op attr */
#define CEXPR_NAMES 5 /* attr op names */
u32 expr_type; /* expression type */
#define CEXPR_USER 1 /* user */
#define CEXPR_ROLE 2 /* role */
#define CEXPR_TYPE 4 /* type */
#define CEXPR_TARGET 8 /* target if set, source otherwise */
#define CEXPR_XTARGET 16 /* special 3rd target for validatetrans rule */
#define CEXPR_L1L2 32 /* low level 1 vs. low level 2 */
#define CEXPR_L1H2 64 /* low level 1 vs. high level 2 */
#define CEXPR_H1L2 128 /* high level 1 vs. low level 2 */
#define CEXPR_H1H2 256 /* high level 1 vs. high level 2 */
#define CEXPR_L1H1 512 /* low level 1 vs. high level 1 */
#define CEXPR_L2H2 1024 /* low level 2 vs. high level 2 */
u32 attr; /* attribute */
#define CEXPR_EQ 1 /* == or eq */
#define CEXPR_NEQ 2 /* != */
#define CEXPR_DOM 3 /* dom */
#define CEXPR_DOMBY 4 /* domby */
#define CEXPR_INCOMP 5 /* incomp */
u32 op; /* operator */
struct ebitmap names; /* names */
struct type_set *type_names;
struct constraint_expr *next; /* next expression */
};
struct constraint_node {
u32 permissions; /* constrained permissions */
struct constraint_expr *expr; /* constraint on permissions */
struct constraint_node *next; /* next constraint */
};
#endif /* _SS_CONSTRAINT_H_ */