2 * AppArmor security module
4 * This file contains AppArmor basic global and lib definitions
6 * Copyright (C) 1998-2008 Novell/SUSE
7 * Copyright 2009-2010 Canonical Ltd.
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
18 #include <linux/slab.h>
24 * Class of mediation types in the AppArmor policy db
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
34 #define AA_CLASS_LAST AA_CLASS_DOMAIN
36 /* Control parameters settable through module/boot flags */
37 extern enum audit_mode aa_g_audit;
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;
43 extern unsigned int aa_g_path_max;
46 * DEBUG remains global (no per profile flag) since it is mostly used in sysctl
47 * which is not related to profile accesses.
50 #define AA_DEBUG(fmt, args...) \
52 if (aa_g_debug && printk_ratelimit()) \
53 printk(KERN_DEBUG "AppArmor: " fmt, ##args); \
56 #define AA_ERROR(fmt, args...) \
58 if (printk_ratelimit()) \
59 printk(KERN_ERR "AppArmor: " fmt, ##args); \
62 /* Flag indicating whether initialization completed */
63 extern int apparmor_initialized __initdata;
66 char *aa_split_fqname(char *args, char **ns_name);
67 void aa_info_message(const char *str);
68 void *__aa_kvmalloc(size_t size, gfp_t flags);
69 void kvfree(void *buffer);
71 static inline void *kvmalloc(size_t size)
73 return __aa_kvmalloc(size, 0);
76 static inline void *kvzalloc(size_t size)
78 return __aa_kvmalloc(size, __GFP_ZERO);
81 /* returns 0 if kref not incremented */
82 static inline int kref_get_not0(struct kref *kref)
84 return atomic_inc_not_zero(&kref->refcount);
88 * aa_strneq - compare null terminated @str to a non null terminated substring
89 * @str: a null terminated string
90 * @sub: a substring, not necessarily null terminated
91 * @len: length of @sub to compare
93 * The @str string must be full consumed for this to be considered a match
95 static inline bool aa_strneq(const char *str, const char *sub, int len)
97 return !strncmp(str, sub, len) && !str[len];
101 * aa_dfa_null_transition - step to next state after null character
102 * @dfa: the dfa to match against
103 * @start: the state of the dfa to start matching in
105 * aa_dfa_null_transition transitions to the next state after a null
106 * character which is not used in standard matching and is only
107 * used to separate pairs.
109 static inline unsigned int aa_dfa_null_transition(struct aa_dfa *dfa,
112 /* the null transition only needs the string's null terminator byte */
113 return aa_dfa_next(dfa, start, 0);
116 static inline bool mediated_filesystem(struct inode *inode)
118 return !(inode->i_sb->s_flags & MS_NOUSER);
121 #endif /* __APPARMOR_H */