| 1 | /* SPDX-License-Identifier: GPL-2.0 */ | 
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| 2 | /* | 
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| 3 | * Type definitions for the multi-level security (MLS) policy. | 
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| 4 | * | 
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| 5 | * Author : Stephen Smalley, <stephen.smalley.work@gmail.com> | 
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| 6 | */ | 
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| 7 |  | 
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| 8 | /* | 
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| 9 | * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> | 
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| 10 | *          Support for enhanced MLS infrastructure. | 
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| 11 | *          Copyright (C) 2004-2005 Trusted Computer Solutions, Inc. | 
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| 12 | */ | 
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| 13 |  | 
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| 14 | #ifndef _SS_MLS_TYPES_H_ | 
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| 15 | #define _SS_MLS_TYPES_H_ | 
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| 16 |  | 
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| 17 | #include "security.h" | 
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| 18 | #include "ebitmap.h" | 
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| 19 |  | 
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| 20 | struct mls_level { | 
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| 21 | u32 sens; /* sensitivity */ | 
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| 22 | struct ebitmap cat; /* category set */ | 
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| 23 | }; | 
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| 24 |  | 
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| 25 | struct mls_range { | 
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| 26 | struct mls_level level[2]; /* low == level[0], high == level[1] */ | 
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| 27 | }; | 
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| 28 |  | 
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| 29 | static inline int mls_level_eq(const struct mls_level *l1, | 
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| 30 | const struct mls_level *l2) | 
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| 31 | { | 
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| 32 | return ((l1->sens == l2->sens) && ebitmap_equal(e1: &l1->cat, e2: &l2->cat)); | 
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| 33 | } | 
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| 34 |  | 
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| 35 | static inline int mls_level_dom(const struct mls_level *l1, | 
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| 36 | const struct mls_level *l2) | 
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| 37 | { | 
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| 38 | return ((l1->sens >= l2->sens) && | 
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| 39 | ebitmap_contains(e1: &l1->cat, e2: &l2->cat, last_e2bit: 0)); | 
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| 40 | } | 
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| 41 |  | 
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| 42 | #define mls_level_incomp(l1, l2) \ | 
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| 43 | (!mls_level_dom((l1), (l2)) && !mls_level_dom((l2), (l1))) | 
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| 44 |  | 
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| 45 | #define mls_level_between(l1, l2, l3) \ | 
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| 46 | (mls_level_dom((l1), (l2)) && mls_level_dom((l3), (l1))) | 
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| 47 |  | 
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| 48 | #define mls_range_contains(r1, r2)                        \ | 
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| 49 | (mls_level_dom(&(r2).level[0], &(r1).level[0]) && \ | 
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| 50 | mls_level_dom(&(r1).level[1], &(r2).level[1])) | 
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| 51 |  | 
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| 52 | #endif /* _SS_MLS_TYPES_H_ */ | 
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| 53 |  | 
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