1 /* 2 * AppArmor security module 3 * 4 * This file contains AppArmor basic global and lib definitions 5 * 6 * Copyright (C) 1998-2008 Novell/SUSE 7 * Copyright 2009-2010 Canonical Ltd. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation, version 2 of the 12 * License. 13 */ 14 15 #ifndef __APPARMOR_H 16 #define __APPARMOR_H 17 18 #include <linux/slab.h> 19 #include <linux/fs.h> 20 21 #include "match.h" 22 23 /* 24 * Class of mediation types in the AppArmor policy db 25 */ 26 #define AA_CLASS_ENTRY 0 27 #define AA_CLASS_UNKNOWN 1 28 #define AA_CLASS_FILE 2 29 #define AA_CLASS_CAP 3 30 #define AA_CLASS_NET 4 31 #define AA_CLASS_RLIMITS 5 32 #define AA_CLASS_DOMAIN 6 33 34 #define AA_CLASS_LAST AA_CLASS_DOMAIN 35 36 /* Control parameters settable through module/boot flags */ 37 extern enum audit_mode aa_g_audit; 38 extern bool aa_g_audit_header; 39 extern bool aa_g_debug; 40 extern bool aa_g_hash_policy; 41 extern bool aa_g_lock_policy; 42 extern bool aa_g_logsyscall; 43 extern bool aa_g_paranoid_load; 44 extern unsigned int aa_g_path_max; 45 46 /* 47 * DEBUG remains global (no per profile flag) since it is mostly used in sysctl 48 * which is not related to profile accesses. 49 */ 50 51 #define AA_DEBUG(fmt, args...) \ 52 do { \ 53 if (aa_g_debug && printk_ratelimit()) \ 54 printk(KERN_DEBUG "AppArmor: " fmt, ##args); \ 55 } while (0) 56 57 #define AA_ERROR(fmt, args...) \ 58 do { \ 59 if (printk_ratelimit()) \ 60 printk(KERN_ERR "AppArmor: " fmt, ##args); \ 61 } while (0) 62 63 /* Flag indicating whether initialization completed */ 64 extern int apparmor_initialized __initdata; 65 66 /* fn's in lib */ 67 char *aa_split_fqname(char *args, char **ns_name); 68 void aa_info_message(const char *str); 69 void *__aa_kvmalloc(size_t size, gfp_t flags); 70 71 static inline void *kvmalloc(size_t size) 72 { 73 return __aa_kvmalloc(size, 0); 74 } 75 76 static inline void *kvzalloc(size_t size) 77 { 78 return __aa_kvmalloc(size, __GFP_ZERO); 79 } 80 81 /* returns 0 if kref not incremented */ 82 static inline int kref_get_not0(struct kref *kref) 83 { 84 return atomic_inc_not_zero(&kref->refcount); 85 } 86 87 /** 88 * aa_strneq - compare null terminated @str to a non null terminated substring 89 * @str: a null terminated string 90 * @sub: a substring, not necessarily null terminated 91 * @len: length of @sub to compare 92 * 93 * The @str string must be full consumed for this to be considered a match 94 */ 95 static inline bool aa_strneq(const char *str, const char *sub, int len) 96 { 97 return !strncmp(str, sub, len) && !str[len]; 98 } 99 100 /** 101 * aa_dfa_null_transition - step to next state after null character 102 * @dfa: the dfa to match against 103 * @start: the state of the dfa to start matching in 104 * 105 * aa_dfa_null_transition transitions to the next state after a null 106 * character which is not used in standard matching and is only 107 * used to separate pairs. 108 */ 109 static inline unsigned int aa_dfa_null_transition(struct aa_dfa *dfa, 110 unsigned int start) 111 { 112 /* the null transition only needs the string's null terminator byte */ 113 return aa_dfa_next(dfa, start, 0); 114 } 115 116 static inline bool mediated_filesystem(struct dentry *dentry) 117 { 118 return !(dentry->d_sb->s_flags & MS_NOUSER); 119 } 120 121 #endif /* __APPARMOR_H */ 122