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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Type definitions for the multi-level security (MLS) policy.
*
* Author : Stephen Smalley, <sds@tycho.nsa.gov>
*/
/*
* Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
*
* Support for enhanced MLS infrastructure.
*
* Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
*/
#ifndef _SS_MLS_TYPES_H_
#define _SS_MLS_TYPES_H_
#include "security.h"
#include "ebitmap.h"
struct mls_level {
u32 sens; /* sensitivity */
struct ebitmap cat; /* category set */
};
struct mls_range {
struct mls_level level[2]; /* low == level[0], high == level[1] */
};
static inline int mls_level_eq(struct mls_level *l1, struct mls_level *l2)
{
return ((l1->sens == l2->sens) &&
ebitmap_cmp(&l1->cat, &l2->cat));
}
static inline int mls_level_dom(struct mls_level *l1, struct mls_level *l2)
{
return ((l1->sens >= l2->sens) &&
ebitmap_contains(&l1->cat, &l2->cat, 0));
}
#define mls_level_incomp(l1, l2) \
(!mls_level_dom((l1), (l2)) && !mls_level_dom((l2), (l1)))
#define mls_level_between(l1, l2, l3) \
(mls_level_dom((l1), (l2)) && mls_level_dom((l3), (l1)))
#define mls_range_contains(r1, r2) \
(mls_level_dom(&(r2).level[0], &(r1).level[0]) && \
mls_level_dom(&(r1).level[1], &(r2).level[1]))
#endif /* _SS_MLS_TYPES_H_ */
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