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/fs.h> 19 20 #include "match.h" 21 22 /* 23 * Class of mediation types in the AppArmor policy db 24 */ 25 #define AA_CLASS_ENTRY 0 26 #define AA_CLASS_UNKNOWN 1 27 #define AA_CLASS_FILE 2 28 #define AA_CLASS_CAP 3 29 #define AA_CLASS_NET 4 30 #define AA_CLASS_RLIMITS 5 31 #define AA_CLASS_DOMAIN 6 32 33 #define AA_CLASS_LAST AA_CLASS_DOMAIN 34 35 /* Control parameters settable through module/boot flags */ 36 extern enum audit_mode aa_g_audit; 37 extern bool aa_g_audit_header; 38 extern bool aa_g_debug; 39 extern bool aa_g_lock_policy; 40 extern bool aa_g_logsyscall; 41 extern bool aa_g_paranoid_load; 42 extern unsigned int aa_g_path_max; 43 44 /* 45 * DEBUG remains global (no per profile flag) since it is mostly used in sysctl 46 * which is not related to profile accesses. 47 */ 48 49 #define AA_DEBUG(fmt, args...) \ 50 do { \ 51 if (aa_g_debug && printk_ratelimit()) \ 52 printk(KERN_DEBUG "AppArmor: " fmt, ##args); \ 53 } while (0) 54 55 #define AA_ERROR(fmt, args...) \ 56 do { \ 57 if (printk_ratelimit()) \ 58 printk(KERN_ERR "AppArmor: " fmt, ##args); \ 59 } while (0) 60 61 /* Flag indicating whether initialization completed */ 62 extern int apparmor_initialized __initdata; 63 64 /* fn's in lib */ 65 char *aa_split_fqname(char *args, char **ns_name); 66 void aa_info_message(const char *str); 67 void *kvmalloc(size_t size); 68 void kvfree(void *buffer); 69 70 71 /** 72 * aa_strneq - compare null terminated @str to a non null terminated substring 73 * @str: a null terminated string 74 * @sub: a substring, not necessarily null terminated 75 * @len: length of @sub to compare 76 * 77 * The @str string must be full consumed for this to be considered a match 78 */ 79 static inline bool aa_strneq(const char *str, const char *sub, int len) 80 { 81 return !strncmp(str, sub, len) && !str[len]; 82 } 83 84 /** 85 * aa_dfa_null_transition - step to next state after null character 86 * @dfa: the dfa to match against 87 * @start: the state of the dfa to start matching in 88 * 89 * aa_dfa_null_transition transitions to the next state after a null 90 * character which is not used in standard matching and is only 91 * used to separate pairs. 92 */ 93 static inline unsigned int aa_dfa_null_transition(struct aa_dfa *dfa, 94 unsigned int start) 95 { 96 /* the null transition only needs the string's null terminator byte */ 97 return aa_dfa_next(dfa, start, 0); 98 } 99 100 static inline bool mediated_filesystem(struct inode *inode) 101 { 102 return !(inode->i_sb->s_flags & MS_NOUSER); 103 } 104 105 #endif /* __APPARMOR_H */ 106