Commit | Line | Data |
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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 | ||
0ca554b9 | 18 | #include <linux/slab.h> |
cdff2642 JJ |
19 | #include <linux/fs.h> |
20 | ||
21 | #include "match.h" | |
22 | ||
ad5ff3db JJ |
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 | ||
cdff2642 JJ |
36 | /* Control parameters settable through module/boot flags */ |
37 | extern enum audit_mode aa_g_audit; | |
90ab5ee9 RR |
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; | |
cdff2642 JJ |
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); | |
0ca554b9 | 68 | void *__aa_kvmalloc(size_t size, gfp_t flags); |
cdff2642 | 69 | |
0ca554b9 JJ |
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 | } | |
cdff2642 | 79 | |
01e2b670 JJ |
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 | ||
cdff2642 JJ |
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 */ | |
0fe1212d | 112 | return aa_dfa_next(dfa, start, 0); |
cdff2642 JJ |
113 | } |
114 | ||
7ac2856d | 115 | static inline bool mediated_filesystem(struct dentry *dentry) |
cdff2642 | 116 | { |
7ac2856d | 117 | return !(dentry->d_sb->s_flags & MS_NOUSER); |
cdff2642 JJ |
118 | } |
119 | ||
120 | #endif /* __APPARMOR_H */ |