security/apparmor/include/apparmor.h

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