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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 */
36extern enum audit_mode aa_g_audit;
37extern bool aa_g_audit_header;
38extern bool aa_g_debug;
39extern bool aa_g_lock_policy;
40extern bool aa_g_logsyscall;
41extern bool aa_g_paranoid_load;
42extern 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 */
62extern int apparmor_initialized __initdata;
63
64/* fn's in lib */
65char *aa_split_fqname(char *args, char **ns_name);
66void aa_info_message(const char *str);
67void *kvmalloc(size_t size);
68void 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 */
79static 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 */
93static 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
100static inline bool mediated_filesystem(struct inode *inode)
101{
102 return !(inode->i_sb->s_flags & MS_NOUSER);
103}
104
105#endif /* __APPARMOR_H */