blob: 7d2f457ac87e1ee107c1a38ff2c7cff23ec1045b [file] [log] [blame]
* AppArmor security module
* This file contains AppArmor basic global and lib definitions
* Copyright (C) 1998-2008 Novell/SUSE
* Copyright 2009-2013 Canonical Ltd.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
#ifndef __APPARMOR_H
#define __APPARMOR_H
#include <linux/slab.h>
#include <linux/fs.h>
#include "match.h"
/* Provide our own test for whether a write lock is held for asserts
* this is because on none SMP systems write_can_lock will always
* resolve to true, which is what you want for code making decisions
* based on it, but wrong for asserts checking that the lock is held
#define write_is_locked(X) !write_can_lock(X)
#define write_is_locked(X) (1)
#endif /* CONFIG_SMP */
* Class of mediation types in the AppArmor policy db
#define AA_CLASS_ENTRY 0
#define AA_CLASS_FILE 2
#define AA_CLASS_CAP 3
#define AA_CLASS_NET 4
#define AA_CLASS_MOUNT 7
#define AA_CLASS_SIGNAL 10
#define AA_CLASS_LABEL 16
/* Control parameters settable through module/boot flags */
extern enum audit_mode aa_g_audit;
extern bool aa_g_audit_header;
extern bool aa_g_debug;
extern bool aa_g_hash_policy;
extern bool aa_g_lock_policy;
extern bool aa_g_logsyscall;
extern bool aa_g_paranoid_load;
extern unsigned int aa_g_path_max;
extern bool aa_g_unconfined_init;
* DEBUG remains global (no per profile flag) since it is mostly used in sysctl
* which is not related to profile accesses.
#define AA_DEBUG(fmt, args...) \
do { \
if (aa_g_debug && printk_ratelimit()) \
printk(KERN_DEBUG "AppArmor: " fmt, ##args); \
} while (0)
#define AA_WARN(X) WARN((X), "APPARMOR WARN %s: %s\n", __FUNCTION__, #X)
#define AA_BUG(X, args...) AA_BUG_FMT((X), "" args )
#define AA_BUG_FMT(X, fmt, args...) \
WARN((X), "AppArmor WARN %s: (" #X "): " fmt, __FUNCTION__ , ##args )
#define AA_ERROR(fmt, args...) \
do { \
if (printk_ratelimit()) \
printk(KERN_ERR "AppArmor: " fmt, ##args); \
} while (0)
/* Flag indicating whether initialization completed */
extern int apparmor_initialized __initdata;
/* fn's in lib */
char *aa_split_fqname(char *args, char **ns_name);
char *aa_splitn_fqname(char *fqname, size_t n, char **ns_name, size_t *ns_len);
void aa_info_message(const char *str);
void *__aa_kvmalloc(size_t size, gfp_t flags);
static inline void *kvmalloc(size_t size)
return __aa_kvmalloc(size, 0);
static inline void *kvzalloc(size_t size)
return __aa_kvmalloc(size, __GFP_ZERO);
/* returns 0 if kref not incremented */
static inline int kref_get_not0(struct kref *kref)
return atomic_inc_not_zero(&kref->refcount);
* aa_strneq - compare null terminated @str to a non null terminated substring
* @str: a null terminated string
* @sub: a substring, not necessarily null terminated
* @len: length of @sub to compare
* The @str string must be full consumed for this to be considered a match
static inline bool aa_strneq(const char *str, const char *sub, int len)
return !strncmp(str, sub, len) && !str[len];
* aa_dfa_null_transition - step to next state after null character
* @dfa: the dfa to match against
* @start: the state of the dfa to start matching in
* aa_dfa_null_transition transitions to the next state after a null
* character which is not used in standard matching and is only
* used to separate pairs.
static inline unsigned int aa_dfa_null_transition(struct aa_dfa *dfa,
unsigned int start)
/* the null transition only needs the string's null terminator byte */
return aa_dfa_next(dfa, start, 0);
static inline bool path_mediated_fs(struct inode *inode)
return !(inode->i_sb->s_flags & MS_NOUSER);
struct counted_str {
struct kref count;
char name[];
#define str_to_counted(str) \
((struct counted_str *)(str - offsetof(struct counted_str,name)))
#define __counted /* atm just a notation */
void aa_str_kref(struct kref *kref);
char *aa_str_alloc(int size, gfp_t gfp);
static inline __counted char *aa_get_str(__counted char *str)
if (str)
return str;
static inline void aa_put_str(__counted char *str)
if (str)
kref_put(&str_to_counted(str)->count, aa_str_kref);
const char *aa_imode_name(umode_t mode);
#endif /* __APPARMOR_H */