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 21 struct mls_level { 22 u32 sens; /* sensitivity */ 23 struct ebitmap cat; /* category set */ 24 }; 25 26 struct mls_range { 27 struct mls_level level[2]; /* low == level[0], high == level[1] */ 28 }; 29 30 static inline int mls_level_eq(const struct mls_level *l1, const struct mls_level *l2) 31 { 32 return ((l1->sens == l2->sens) && 33 ebitmap_cmp(&l1->cat, &l2->cat)); 34 } 35 36 static inline int mls_level_dom(const struct mls_level *l1, const 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_ */ 53