mirror of https://gitee.com/openkylin/linux.git
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
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/*
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* AppArmor security module
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*
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* This file contains AppArmor lib definitions
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*
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* 2017 Canonical Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*/
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#ifndef __AA_LIB_H
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#define __AA_LIB_H
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include "match.h"
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/*
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* DEBUG remains global (no per profile flag) since it is mostly used in sysctl
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* which is not related to profile accesses.
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*/
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#define AA_DEBUG(fmt, args...) \
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do { \
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if (aa_g_debug) \
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pr_debug_ratelimited("AppArmor: " fmt, ##args); \
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} while (0)
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#define AA_ERROR(fmt, args...) \
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pr_err_ratelimited("AppArmor: " fmt, ##args)
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/* Flag indicating whether initialization completed */
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extern int apparmor_initialized __initdata;
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/* fn's in lib */
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char *aa_split_fqname(char *args, char **ns_name);
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void aa_info_message(const char *str);
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void *__aa_kvmalloc(size_t size, gfp_t flags);
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static inline void *kvmalloc(size_t size)
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{
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return __aa_kvmalloc(size, 0);
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}
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static inline void *kvzalloc(size_t size)
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{
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return __aa_kvmalloc(size, __GFP_ZERO);
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}
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/* returns 0 if kref not incremented */
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static inline int kref_get_not0(struct kref *kref)
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{
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return atomic_inc_not_zero(&kref->refcount);
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}
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/**
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* aa_strneq - compare null terminated @str to a non null terminated substring
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* @str: a null terminated string
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* @sub: a substring, not necessarily null terminated
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* @len: length of @sub to compare
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*
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* The @str string must be full consumed for this to be considered a match
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*/
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static inline bool aa_strneq(const char *str, const char *sub, int len)
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{
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return !strncmp(str, sub, len) && !str[len];
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}
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/**
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* aa_dfa_null_transition - step to next state after null character
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* @dfa: the dfa to match against
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* @start: the state of the dfa to start matching in
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*
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* aa_dfa_null_transition transitions to the next state after a null
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* character which is not used in standard matching and is only
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* used to separate pairs.
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*/
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static inline unsigned int aa_dfa_null_transition(struct aa_dfa *dfa,
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unsigned int start)
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{
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/* the null transition only needs the string's null terminator byte */
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return aa_dfa_next(dfa, start, 0);
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}
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static inline bool mediated_filesystem(struct dentry *dentry)
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{
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return !(dentry->d_sb->s_flags & MS_NOUSER);
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}
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#endif /* AA_LIB_H */
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