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_lock_policy; 41 extern bool aa_g_logsyscall; 42 extern bool aa_g_paranoid_load; 43 extern unsigned int aa_g_path_max; 44 45 /* 46 * DEBUG remains global (no per profile flag) since it is mostly used in sysctl 47 * which is not related to profile accesses. 48 */ 49 50 #define AA_DEBUG(fmt, args...) \ 51 do { \ 52 if (aa_g_debug && printk_ratelimit()) \ 53 printk(KERN_DEBUG "AppArmor: " fmt, ##args); \ 54 } while (0) 55 56 #define AA_ERROR(fmt, args...) \ 57 do { \ 58 if (printk_ratelimit()) \ 59 printk(KERN_ERR "AppArmor: " fmt, ##args); \ 60 } while (0) 61 62 /* Flag indicating whether initialization completed */ 63 extern int apparmor_initialized __initdata; 64 65 /* fn's in lib */ 66 char *aa_split_fqname(char *args, char **ns_name); 67 void aa_info_message(const char *str); 68 void *__aa_kvmalloc(size_t size, gfp_t flags); 69 70 static inline void *kvmalloc(size_t size) 71 { 72 return __aa_kvmalloc(size, 0); 73 } 74 75 static inline void *kvzalloc(size_t size) 76 { 77 return __aa_kvmalloc(size, __GFP_ZERO); 78 } 79 80 /* returns 0 if kref not incremented */ 81 static inline int kref_get_not0(struct kref *kref) 82 { 83 return atomic_inc_not_zero(&kref->refcount); 84 } 85 86 /** 87 * aa_strneq - compare null terminated @str to a non null terminated substring 88 * @str: a null terminated string 89 * @sub: a substring, not necessarily null terminated 90 * @len: length of @sub to compare 91 * 92 * The @str string must be full consumed for this to be considered a match 93 */ 94 static inline bool aa_strneq(const char *str, const char *sub, int len) 95 { 96 return !strncmp(str, sub, len) && !str[len]; 97 } 98 99 /** 100 * aa_dfa_null_transition - step to next state after null character 101 * @dfa: the dfa to match against 102 * @start: the state of the dfa to start matching in 103 * 104 * aa_dfa_null_transition transitions to the next state after a null 105 * character which is not used in standard matching and is only 106 * used to separate pairs. 107 */ 108 static inline unsigned int aa_dfa_null_transition(struct aa_dfa *dfa, 109 unsigned int start) 110 { 111 /* the null transition only needs the string's null terminator byte */ 112 return aa_dfa_next(dfa, start, 0); 113 } 114 115 static inline bool mediated_filesystem(struct dentry *dentry) 116 { 117 return !(dentry->d_sb->s_flags & MS_NOUSER); 118 } 119 120 #endif /* __APPARMOR_H */ 121