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