[linux-2.6-block.git] / kernel / audit.h

/* 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>
#include <uapi/linux/mqueue.h>

/* AUDIT_NAMES is the number of slots we reserve in the audit_context
 * for saving names from getname().  If we get more names we will allocate
 * a name dynamically and also add those to the list anchored by names_list. */
#define AUDIT_NAMES	5

/* 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_BUILD_CONTEXT,	/* Create the per-task audit_context,
				 * and 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_fsnotify_mark;
struct audit_tree;
struct audit_chunk;

struct audit_entry {
	struct list_head	list;
	struct rcu_head		rcu;
	struct audit_krule	rule;
};

struct audit_cap_data {
	kernel_cap_t		permitted;
	kernel_cap_t		inheritable;
	union {
		unsigned int	fE;		/* effective bit of file cap */
		kernel_cap_t	effective;	/* effective set of process */
	};
};

/* When fs/namei.c:getname() is called, we store the pointer in name and bump
 * the refcnt in the associated filename struct.
 *
 * Further, in fs/namei.c:path_lookup() we store the inode and device.
 */
struct audit_names {
	struct list_head	list;		/* audit_context->names_list */

	struct filename		*name;
	int			name_len;	/* number of chars to log */
	bool			hidden;		/* don't log this record */

	unsigned long		ino;
	dev_t			dev;
	umode_t			mode;
	kuid_t			uid;
	kgid_t			gid;
	dev_t			rdev;
	u32			osid;
	struct audit_cap_data	fcap;
	unsigned int		fcap_ver;
	unsigned char		type;		/* record type */
	/*
	 * This was an allocated audit_names and not from the array of
	 * names allocated in the task audit context.  Thus this name
	 * should be freed on syscall exit.
	 */
	bool			should_free;
};

struct audit_proctitle {
	int	len;	/* length of the cmdline field. */
	char	*value;	/* the cmdline field */
};

/* The per-task audit context. */
struct audit_context {
	int		    dummy;	/* must be the first element */
	int		    in_syscall;	/* 1 if task is in a syscall */
	enum audit_state    state, current_state;
	unsigned int	    serial;     /* serial number for record */
	int		    major;      /* syscall number */
	struct timespec	    ctime;      /* time of syscall entry */
	unsigned long	    argv[4];    /* syscall arguments */
	long		    return_code;/* syscall return code */
	u64		    prio;
	int		    return_valid; /* return code is valid */
	/*
	 * The names_list is the list of all audit_names collected during this
	 * syscall.  The first AUDIT_NAMES entries in the names_list will
	 * actually be from the preallocated_names array for performance
	 * reasons.  Except during allocation they should never be referenced
	 * through the preallocated_names array and should only be found/used
	 * by running the names_list.
	 */
	struct audit_names  preallocated_names[AUDIT_NAMES];
	int		    name_count; /* total records in names_list */
	struct list_head    names_list;	/* struct audit_names->list anchor */
	char		    *filterkey;	/* key for rule that triggered record */
	struct path	    pwd;
	struct audit_aux_data *aux;
	struct audit_aux_data *aux_pids;
	struct sockaddr_storage *sockaddr;
	size_t sockaddr_len;
				/* Save things to print about task_struct */
	pid_t		    pid, ppid;
	kuid_t		    uid, euid, suid, fsuid;
	kgid_t		    gid, egid, sgid, fsgid;
	unsigned long	    personality;
	int		    arch;

	pid_t		    target_pid;
	kuid_t		    target_auid;
	kuid_t		    target_uid;
	unsigned int	    target_sessionid;
	u32		    target_sid;
	char		    target_comm[TASK_COMM_LEN];

	struct audit_tree_refs *trees, *first_trees;
	struct list_head killed_trees;
	int tree_count;

	int type;
	union {
		struct {
			int nargs;
			long args[6];
		} socketcall;
		struct {
			kuid_t			uid;
			kgid_t			gid;
			umode_t			mode;
			u32			osid;
			int			has_perm;
			uid_t			perm_uid;
			gid_t			perm_gid;
			umode_t			perm_mode;
			unsigned long		qbytes;
		} ipc;
		struct {
			mqd_t			mqdes;
			struct mq_attr		mqstat;
		} mq_getsetattr;
		struct {
			mqd_t			mqdes;
			int			sigev_signo;
		} mq_notify;
		struct {
			mqd_t			mqdes;
			size_t			msg_len;
			unsigned int		msg_prio;
			struct timespec		abs_timeout;
		} mq_sendrecv;
		struct {
			int			oflag;
			umode_t			mode;
			struct mq_attr		attr;
		} mq_open;
		struct {
			pid_t			pid;
			struct audit_cap_data	cap;
		} capset;
		struct {
			int			fd;
			int			flags;
		} mmap;
		struct {
			int			argc;
		} execve;
	};
	int fds[2];
	struct audit_proctitle proctitle;
};

extern u32 audit_ever_enabled;

extern void audit_copy_inode(struct audit_names *name,
			     const struct dentry *dentry,
			     struct inode *inode);
extern void audit_log_cap(struct audit_buffer *ab, char *prefix,
			  kernel_cap_t *cap);
extern void audit_log_name(struct audit_context *context,
			   struct audit_names *n, struct path *path,
			   int record_num, int *call_panic);

extern int audit_pid;

#define AUDIT_INODE_BUCKETS	32
extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];

static inline int audit_hash_ino(u32 ino)
{
	return (ino & (AUDIT_INODE_BUCKETS-1));
}

/* Indicates that audit should log the full pathname. */
#define AUDIT_NAME_FULL -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_uid_comparator(kuid_t left, u32 op, kuid_t right);
extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
extern int parent_len(const char *path);
extern int audit_compare_dname_path(const char *dname, const char *path, int plen);
extern struct sk_buff *audit_make_reply(__u32 portid, int seq, int type,
					int done, int multi,
					const void *payload, int size);
extern void		    audit_panic(const char *message);

struct audit_netlink_list {
	__u32 portid;
	struct net *net;
	struct sk_buff_head q;
};

int audit_send_list(void *);

struct audit_net {
	struct sock *nlsk;
};

extern int selinux_audit_rule_update(void);

extern struct mutex audit_filter_mutex;
extern int audit_del_rule(struct audit_entry *);
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);

extern void audit_log_d_path_exe(struct audit_buffer *ab,
				 struct mm_struct *mm);

/* audit watch functions */
#ifdef CONFIG_AUDIT_WATCH
extern 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);

extern struct audit_fsnotify_mark *audit_alloc_mark(struct audit_krule *krule, char *pathname, int len);
extern char *audit_mark_path(struct audit_fsnotify_mark *mark);
extern void audit_remove_mark(struct audit_fsnotify_mark *audit_mark);
extern void audit_remove_mark_rule(struct audit_krule *krule);
extern int audit_mark_compare(struct audit_fsnotify_mark *mark, unsigned long ino, dev_t dev);
extern int audit_dupe_exe(struct audit_krule *new, struct audit_krule *old);
extern int audit_exe_compare(struct task_struct *tsk, struct audit_fsnotify_mark *mark);

#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

#define audit_alloc_mark(k, p, l) (ERR_PTR(-EINVAL))
#define audit_mark_path(m) ""
#define audit_remove_mark(m)
#define audit_remove_mark_rule(k)
#define audit_mark_compare(m, i, d) 0
#define audit_exe_compare(t, m) (-EINVAL)
#define audit_dupe_exe(n, o) (-EINVAL)
#endif /* CONFIG_AUDIT_WATCH */

#ifdef CONFIG_AUDIT_TREE
extern struct audit_chunk *audit_tree_lookup(const struct inode *);
extern void audit_put_chunk(struct audit_chunk *);
extern bool 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 kuid_t audit_sig_uid;
extern u32 audit_sig_sid;

#ifdef CONFIG_AUDITSYSCALL
extern 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;
Commit	Line	Data
	1	/* audit -- definition of audit_context structure and supporting types
	2	*
	3	* Copyright 2003-2004 Red Hat, Inc.
	4	* Copyright 2005 Hewlett-Packard Development Company, L.P.
	5	* Copyright 2005 IBM Corporation
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include <linux/fs.h>
	23	#include <linux/audit.h>
	24	#include <linux/skbuff.h>
	25	#include <uapi/linux/mqueue.h>
	26
	27	/* AUDIT_NAMES is the number of slots we reserve in the audit_context
	28	* for saving names from getname(). If we get more names we will allocate
	29	* a name dynamically and also add those to the list anchored by names_list. */
	30	#define AUDIT_NAMES 5
	31
	32	/* At task start time, the audit_state is set in the audit_context using
	33	a per-task filter. At syscall entry, the audit_state is augmented by
	34	the syscall filter. */
	35	enum audit_state {
	36	AUDIT_DISABLED, /* Do not create per-task audit_context.
	37	* No syscall-specific audit records can
	38	* be generated. */
	39	AUDIT_BUILD_CONTEXT, /* Create the per-task audit_context,
	40	* and fill it in at syscall
	41	* entry time. This makes a full
	42	* syscall record available if some
	43	* other part of the kernel decides it
	44	* should be recorded. */
	45	AUDIT_RECORD_CONTEXT /* Create the per-task audit_context,
	46	* always fill it in at syscall entry
	47	* time, and always write out the audit
	48	* record at syscall exit time. */
	49	};
	50
	51	/* Rule lists */
	52	struct audit_watch;
	53	struct audit_fsnotify_mark;
	54	struct audit_tree;
	55	struct audit_chunk;
	56
	57	struct audit_entry {
	58	struct list_head list;
	59	struct rcu_head rcu;
	60	struct audit_krule rule;
	61	};
	62
	63	struct audit_cap_data {
	64	kernel_cap_t permitted;
	65	kernel_cap_t inheritable;
	66	union {
	67	unsigned int fE; /* effective bit of file cap */
	68	kernel_cap_t effective; /* effective set of process */
	69	};
	70	};
	71
	72	/* When fs/namei.c:getname() is called, we store the pointer in name and bump
	73	* the refcnt in the associated filename struct.
	74	*
	75	* Further, in fs/namei.c:path_lookup() we store the inode and device.
	76	*/
	77	struct audit_names {
	78	struct list_head list; /* audit_context->names_list */
	79
	80	struct filename *name;
	81	int name_len; /* number of chars to log */
	82	bool hidden; /* don't log this record */
	83
	84	unsigned long ino;
	85	dev_t dev;
	86	umode_t mode;
	87	kuid_t uid;
	88	kgid_t gid;
	89	dev_t rdev;
	90	u32 osid;
	91	struct audit_cap_data fcap;
	92	unsigned int fcap_ver;
	93	unsigned char type; /* record type */
	94	/*
	95	* This was an allocated audit_names and not from the array of
	96	* names allocated in the task audit context. Thus this name
	97	* should be freed on syscall exit.
	98	*/
	99	bool should_free;
	100	};
	101
	102	struct audit_proctitle {
	103	int len; /* length of the cmdline field. */
	104	char value; / the cmdline field */
	105	};
	106
	107	/* The per-task audit context. */
	108	struct audit_context {
	109	int dummy; /* must be the first element */
	110	int in_syscall; /* 1 if task is in a syscall */
	111	enum audit_state state, current_state;
	112	unsigned int serial; /* serial number for record */
	113	int major; /* syscall number */
	114	struct timespec ctime; /* time of syscall entry */
	115	unsigned long argv[4]; /* syscall arguments */
	116	long return_code;/* syscall return code */
	117	u64 prio;
	118	int return_valid; /* return code is valid */
	119	/*
	120	* The names_list is the list of all audit_names collected during this
	121	* syscall. The first AUDIT_NAMES entries in the names_list will
	122	* actually be from the preallocated_names array for performance
	123	* reasons. Except during allocation they should never be referenced
	124	* through the preallocated_names array and should only be found/used
	125	* by running the names_list.
	126	*/
	127	struct audit_names preallocated_names[AUDIT_NAMES];
	128	int name_count; /* total records in names_list */
	129	struct list_head names_list; /* struct audit_names->list anchor */
	130	char filterkey; / key for rule that triggered record */
	131	struct path pwd;
	132	struct audit_aux_data *aux;
	133	struct audit_aux_data *aux_pids;
	134	struct sockaddr_storage *sockaddr;
	135	size_t sockaddr_len;
	136	/* Save things to print about task_struct */
	137	pid_t pid, ppid;
	138	kuid_t uid, euid, suid, fsuid;
	139	kgid_t gid, egid, sgid, fsgid;
	140	unsigned long personality;
	141	int arch;
	142
	143	pid_t target_pid;
	144	kuid_t target_auid;
	145	kuid_t target_uid;
	146	unsigned int target_sessionid;
	147	u32 target_sid;
	148	char target_comm[TASK_COMM_LEN];
	149
	150	struct audit_tree_refs trees, first_trees;
	151	struct list_head killed_trees;
	152	int tree_count;
	153
	154	int type;
	155	union {
	156	struct {
	157	int nargs;
	158	long args[6];
	159	} socketcall;
	160	struct {
	161	kuid_t uid;
	162	kgid_t gid;
	163	umode_t mode;
	164	u32 osid;
	165	int has_perm;
	166	uid_t perm_uid;
	167	gid_t perm_gid;
	168	umode_t perm_mode;
	169	unsigned long qbytes;
	170	} ipc;
	171	struct {
	172	mqd_t mqdes;
	173	struct mq_attr mqstat;
	174	} mq_getsetattr;
	175	struct {
	176	mqd_t mqdes;
	177	int sigev_signo;
	178	} mq_notify;
	179	struct {
	180	mqd_t mqdes;
	181	size_t msg_len;
	182	unsigned int msg_prio;
	183	struct timespec abs_timeout;
	184	} mq_sendrecv;
	185	struct {
	186	int oflag;
	187	umode_t mode;
	188	struct mq_attr attr;
	189	} mq_open;
	190	struct {
	191	pid_t pid;
	192	struct audit_cap_data cap;
	193	} capset;
	194	struct {
	195	int fd;
	196	int flags;
	197	} mmap;
	198	struct {
	199	int argc;
	200	} execve;
	201	};
	202	int fds[2];
	203	struct audit_proctitle proctitle;
	204	};
	205
	206	extern u32 audit_ever_enabled;
	207
	208	extern void audit_copy_inode(struct audit_names *name,
	209	const struct dentry *dentry,
	210	struct inode *inode);
	211	extern void audit_log_cap(struct audit_buffer ab, char prefix,
	212	kernel_cap_t *cap);
	213	extern void audit_log_name(struct audit_context *context,
	214	struct audit_names n, struct path path,
	215	int record_num, int *call_panic);
	216
	217	extern int audit_pid;
	218
	219	#define AUDIT_INODE_BUCKETS 32
	220	extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
	221
	222	static inline int audit_hash_ino(u32 ino)
	223	{
	224	return (ino & (AUDIT_INODE_BUCKETS-1));
	225	}
	226
	227	/* Indicates that audit should log the full pathname. */
	228	#define AUDIT_NAME_FULL -1
	229
	230	extern int audit_match_class(int class, unsigned syscall);
	231	extern int audit_comparator(const u32 left, const u32 op, const u32 right);
	232	extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right);
	233	extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
	234	extern int parent_len(const char *path);
	235	extern int audit_compare_dname_path(const char dname, const char path, int plen);
	236	extern struct sk_buff *audit_make_reply(__u32 portid, int seq, int type,
	237	int done, int multi,
	238	const void *payload, int size);
	239	extern void audit_panic(const char *message);
	240
	241	struct audit_netlink_list {
	242	__u32 portid;
	243	struct net *net;
	244	struct sk_buff_head q;
	245	};
	246
	247	int audit_send_list(void *);
	248
	249	struct audit_net {
	250	struct sock *nlsk;
	251	};
	252
	253	extern int selinux_audit_rule_update(void);
	254
	255	extern struct mutex audit_filter_mutex;
	256	extern int audit_del_rule(struct audit_entry *);
	257	extern void audit_free_rule_rcu(struct rcu_head *);
	258	extern struct list_head audit_filter_list[];
	259
	260	extern struct audit_entry audit_dupe_rule(struct audit_krule old);
	261
	262	extern void audit_log_d_path_exe(struct audit_buffer *ab,
	263	struct mm_struct *mm);
	264
	265	/* audit watch functions */
	266	#ifdef CONFIG_AUDIT_WATCH
	267	extern void audit_put_watch(struct audit_watch *watch);
	268	extern void audit_get_watch(struct audit_watch *watch);
	269	extern int audit_to_watch(struct audit_krule krule, char path, int len, u32 op);
	270	extern int audit_add_watch(struct audit_krule krule, struct list_head *list);
	271	extern void audit_remove_watch_rule(struct audit_krule *krule);
	272	extern char audit_watch_path(struct audit_watch watch);
	273	extern int audit_watch_compare(struct audit_watch *watch, unsigned long ino, dev_t dev);
	274
	275	extern struct audit_fsnotify_mark audit_alloc_mark(struct audit_krule krule, char *pathname, int len);
	276	extern char audit_mark_path(struct audit_fsnotify_mark mark);
	277	extern void audit_remove_mark(struct audit_fsnotify_mark *audit_mark);
	278	extern void audit_remove_mark_rule(struct audit_krule *krule);
	279	extern int audit_mark_compare(struct audit_fsnotify_mark *mark, unsigned long ino, dev_t dev);
	280	extern int audit_dupe_exe(struct audit_krule new, struct audit_krule old);
	281	extern int audit_exe_compare(struct task_struct tsk, struct audit_fsnotify_mark mark);
	282
	283	#else
	284	#define audit_put_watch(w) {}
	285	#define audit_get_watch(w) {}
	286	#define audit_to_watch(k, p, l, o) (-EINVAL)
	287	#define audit_add_watch(k, l) (-EINVAL)
	288	#define audit_remove_watch_rule(k) BUG()
	289	#define audit_watch_path(w) ""
	290	#define audit_watch_compare(w, i, d) 0
	291
	292	#define audit_alloc_mark(k, p, l) (ERR_PTR(-EINVAL))
	293	#define audit_mark_path(m) ""
	294	#define audit_remove_mark(m)
	295	#define audit_remove_mark_rule(k)
	296	#define audit_mark_compare(m, i, d) 0
	297	#define audit_exe_compare(t, m) (-EINVAL)
	298	#define audit_dupe_exe(n, o) (-EINVAL)
	299	#endif /* CONFIG_AUDIT_WATCH */
	300
	301	#ifdef CONFIG_AUDIT_TREE
	302	extern struct audit_chunk audit_tree_lookup(const struct inode );
	303	extern void audit_put_chunk(struct audit_chunk *);
	304	extern bool audit_tree_match(struct audit_chunk , struct audit_tree );
	305	extern int audit_make_tree(struct audit_krule , char , u32);
	306	extern int audit_add_tree_rule(struct audit_krule *);
	307	extern int audit_remove_tree_rule(struct audit_krule *);
	308	extern void audit_trim_trees(void);
	309	extern int audit_tag_tree(char old, char new);
	310	extern const char audit_tree_path(struct audit_tree );
	311	extern void audit_put_tree(struct audit_tree *);
	312	extern void audit_kill_trees(struct list_head *);
	313	#else
	314	#define audit_remove_tree_rule(rule) BUG()
	315	#define audit_add_tree_rule(rule) -EINVAL
	316	#define audit_make_tree(rule, str, op) -EINVAL
	317	#define audit_trim_trees() (void)0
	318	#define audit_put_tree(tree) (void)0
	319	#define audit_tag_tree(old, new) -EINVAL
	320	#define audit_tree_path(rule) "" /* never called */
	321	#define audit_kill_trees(list) BUG()
	322	#endif
	323
	324	extern char audit_unpack_string(void , size_t , size_t);
	325
	326	extern pid_t audit_sig_pid;
	327	extern kuid_t audit_sig_uid;
	328	extern u32 audit_sig_sid;
	329
	330	#ifdef CONFIG_AUDITSYSCALL
	331	extern int __audit_signal_info(int sig, struct task_struct *t);
	332	static inline int audit_signal_info(int sig, struct task_struct *t)
	333	{
	334	if (unlikely((audit_pid && t->tgid == audit_pid) \|\|
	335	(audit_signals && !audit_dummy_context())))
	336	return __audit_signal_info(sig, t);
	337	return 0;
	338	}
	339	extern void audit_filter_inodes(struct task_struct , struct audit_context );
	340	extern struct list_head *audit_killed_trees(void);
	341	#else
	342	#define audit_signal_info(s,t) AUDIT_DISABLED
	343	#define audit_filter_inodes(t,c) AUDIT_DISABLED
	344	#endif
	345
	346	extern struct mutex audit_cmd_mutex;