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cdff2642 JJ |
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; | |
90ab5ee9 RR |
24 | extern bool aa_g_audit_header; |
25 | extern bool aa_g_debug; | |
26 | extern bool aa_g_lock_policy; | |
27 | extern bool aa_g_logsyscall; | |
28 | extern bool aa_g_paranoid_load; | |
cdff2642 JJ |
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 */ |