| John Johansen | cdff264 | 2010-07-29 14:47:57 -0700 | [diff] [blame] | 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 */ |