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