1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Type definitions for the multi-level security (MLS) policy.
 4 *
 5 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
 6 */
 7/*
 8 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
 9 *
10 *	Support for enhanced MLS infrastructure.
11 *
12 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
13 */
14
15#ifndef _SS_MLS_TYPES_H_
16#define _SS_MLS_TYPES_H_
17
18#include "security.h"
19#include "ebitmap.h"
20
21struct mls_level {
22	u32 sens;		/* sensitivity */
23	struct ebitmap cat;	/* category set */
24};
25
26struct mls_range {
27	struct mls_level level[2]; /* low == level[0], high == level[1] */
28};
29
30static inline int mls_level_eq(struct mls_level *l1, struct mls_level *l2)
31{
32	return ((l1->sens == l2->sens) &&
33		ebitmap_cmp(&l1->cat, &l2->cat));
34}
35
36static inline int mls_level_dom(struct mls_level *l1, struct mls_level *l2)
37{
38	return ((l1->sens >= l2->sens) &&
39		ebitmap_contains(&l1->cat, &l2->cat, 0));
40}
41
42#define mls_level_incomp(l1, l2) \
43(!mls_level_dom((l1), (l2)) && !mls_level_dom((l2), (l1)))
44
45#define mls_level_between(l1, l2, l3) \
46(mls_level_dom((l1), (l2)) && mls_level_dom((l3), (l1)))
47
48#define mls_range_contains(r1, r2) \
49(mls_level_dom(&(r2).level[0], &(r1).level[0]) && \
50 mls_level_dom(&(r1).level[1], &(r2).level[1]))
51
52#endif	/* _SS_MLS_TYPES_H_ */