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