/* audit -- definition of audit_context structure and supporting types  * * Copyright 2003-2004 Red Hat, Inc. * Copyright 2005 Hewlett-Packard Development Company, L.P. * Copyright 2005 IBM Corporation * * 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; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */ #include <linux/fs.h>#include <linux/audit.h>#include <linux/skbuff.h> /* 0 = no checking   1 = put_count checking   2 = verbose put_count checking*/#define AUDIT_DEBUG 0 /* At task start time, the audit_state is set in the audit_context using   a per-task filter.  At syscall entry, the audit_state is augmented by   the syscall filter. */enum audit_state {	AUDIT_DISABLED,		/* Do not create per-task audit_context.				 * No syscall-specific audit records can				 * be generated. */	AUDIT_SETUP_CONTEXT,	/* Create the per-task audit_context,				 * but don't necessarily fill it in at				 * syscall entry time (i.e., filter				 * instead). */	AUDIT_BUILD_CONTEXT,	/* Create the per-task audit_context,				 * and always fill it in at syscall				 * entry time.  This makes a full				 * syscall record available if some				 * other part of the kernel decides it				 * should be recorded. */	AUDIT_RECORD_CONTEXT	/* Create the per-task audit_context,				 * always fill it in at syscall entry				 * time, and always write out the audit				 * record at syscall exit time.  */}; /* Rule lists */struct audit_watch;struct audit_tree;struct audit_chunk; struct audit_entry {	struct list_head	list;	struct rcu_head		rcu;	struct audit_krule	rule;}; #ifdef CONFIG_AUDITextern int audit_enabled;extern int audit_ever_enabled;#endif extern int audit_pid; #define AUDIT_INODE_BUCKETS	32extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS]; static inline int audit_hash_ino(u32 ino){	return (ino & (AUDIT_INODE_BUCKETS-1));} extern int audit_match_class(int class, unsigned syscall);extern int audit_comparator(const u32 left, const u32 op, const u32 right);extern int audit_compare_dname_path(const char *dname, const char *path,				    int *dirlen);extern struct sk_buff *	    audit_make_reply(int pid, int seq, int type,					     int done, int multi,					     const void *payload, int size);extern void		    audit_panic(const char *message); struct audit_netlink_list {	int pid;	struct sk_buff_head q;}; int audit_send_list(void *); extern int selinux_audit_rule_update(void); extern struct mutex audit_filter_mutex;extern void audit_free_rule_rcu(struct rcu_head *);extern struct list_head audit_filter_list[]; extern struct audit_entry *audit_dupe_rule(struct audit_krule *old); /* audit watch functions */#ifdef CONFIG_AUDIT_WATCHextern void audit_put_watch(struct audit_watch *watch);extern void audit_get_watch(struct audit_watch *watch);extern int audit_to_watch(struct audit_krule *krule, char *path, int len, u32 op);extern int audit_add_watch(struct audit_krule *krule, struct list_head **list);extern void audit_remove_watch_rule(struct audit_krule *krule);extern char *audit_watch_path(struct audit_watch *watch);extern int audit_watch_compare(struct audit_watch *watch, unsigned long ino, dev_t dev);#else#define audit_put_watch(w) {}#define audit_get_watch(w) {}#define audit_to_watch(k, p, l, o) (-EINVAL)#define audit_add_watch(k, l) (-EINVAL)#define audit_remove_watch_rule(k) BUG()#define audit_watch_path(w) ""#define audit_watch_compare(w, i, d) 0 #endif /* CONFIG_AUDIT_WATCH */ #ifdef CONFIG_AUDIT_TREEextern struct audit_chunk *audit_tree_lookup(const struct inode *);extern void audit_put_chunk(struct audit_chunk *);extern int audit_tree_match(struct audit_chunk *, struct audit_tree *);extern int audit_make_tree(struct audit_krule *, char *, u32);extern int audit_add_tree_rule(struct audit_krule *);extern int audit_remove_tree_rule(struct audit_krule *);extern void audit_trim_trees(void);extern int audit_tag_tree(char *old, char *new);extern const char *audit_tree_path(struct audit_tree *);extern void audit_put_tree(struct audit_tree *);extern void audit_kill_trees(struct list_head *);#else#define audit_remove_tree_rule(rule) BUG()#define audit_add_tree_rule(rule) -EINVAL#define audit_make_tree(rule, str, op) -EINVAL#define audit_trim_trees() (void)0#define audit_put_tree(tree) (void)0#define audit_tag_tree(old, new) -EINVAL#define audit_tree_path(rule) ""	/* never called */#define audit_kill_trees(list) BUG()#endif extern char *audit_unpack_string(void **, size_t *, size_t); extern pid_t audit_sig_pid;extern uid_t audit_sig_uid;extern u32 audit_sig_sid; #ifdef CONFIG_AUDITSYSCALLextern int __audit_signal_info(int sig, struct task_struct *t);static inline int audit_signal_info(int sig, struct task_struct *t){	if (unlikely((audit_pid && t->tgid == audit_pid) ||		     (audit_signals && !audit_dummy_context())))		return __audit_signal_info(sig, t);	return 0;}extern void audit_filter_inodes(struct task_struct *, struct audit_context *);extern struct list_head *audit_killed_trees(void);#else#define audit_signal_info(s,t) AUDIT_DISABLED#define audit_filter_inodes(t,c) AUDIT_DISABLED#endif extern struct mutex audit_cmd_mutex;