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0fe1212d05
Update aa_dfa_match so that it doesn't result in an input string being walked twice (once to get its length and another time to match) Add a single step functions aa_dfa_next Signed-off-by: John Johansen <john.johansen@canonical.com> Acked-by: Kees Cook <kees@ubuntu.com>
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* AppArmor security module
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*
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* This file contains AppArmor basic global and lib definitions
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*
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* Copyright (C) 1998-2008 Novell/SUSE
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* Copyright 2009-2010 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 __APPARMOR_H
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#define __APPARMOR_H
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#include <linux/fs.h>
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#include "match.h"
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/* Control parameters settable through module/boot flags */
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extern enum audit_mode aa_g_audit;
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extern bool aa_g_audit_header;
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extern bool aa_g_debug;
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extern bool aa_g_lock_policy;
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extern bool aa_g_logsyscall;
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extern bool aa_g_paranoid_load;
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extern unsigned int aa_g_path_max;
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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 && printk_ratelimit()) \
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printk(KERN_DEBUG "AppArmor: " fmt, ##args); \
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} while (0)
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#define AA_ERROR(fmt, args...) \
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do { \
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if (printk_ratelimit()) \
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printk(KERN_ERR "AppArmor: " fmt, ##args); \
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} while (0)
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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 *kvmalloc(size_t size);
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void kvfree(void *buffer);
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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 inode *inode)
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{
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return !(inode->i_sb->s_flags & MS_NOUSER);
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}
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#endif /* __APPARMOR_H */
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