[GitHub/mt8127/android_kernel_alcatel_ttab.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>

/* 0 = no checking
   1 = put_count checking
   2 = verbose put_count checking
*/
#define AUDIT_DEBUG 0

/* 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_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
 * we don't let putname() free it (instead we free all of the saved
 * pointers at syscall exit time).
 *
 * 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			name_put;	/* call __putname()? */

	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;
};

/* 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;
	};
	int fds[2];

#if AUDIT_DEBUG
	int		    put_count;
	int		    ino_count;
#endif
};

extern int audit_ever_enabled;

extern void audit_copy_inode(struct audit_names *name,
			     const struct dentry *dentry,
			     const struct inode *inode);
extern void audit_log_cap(struct audit_buffer *ab, char *prefix,
			  kernel_cap_t *cap);
extern void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name);
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(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_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);
#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_TREE
extern 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 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
fe7752ba DW	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>
9044e6bc	24	#include <linux/skbuff.h>
b24a30a7	25	#include <uapi/linux/mqueue.h>
fe7752ba DW	26
	27	/* 0 = no checking
	28	1 = put_count checking
	29	2 = verbose put_count checking
	30	*/
	31	#define AUDIT_DEBUG 0
	32
b24a30a7 EP	33	/* AUDIT_NAMES is the number of slots we reserve in the audit_context
	34	* for saving names from getname(). If we get more names we will allocate
	35	* a name dynamically and also add those to the list anchored by names_list. */
	36	#define AUDIT_NAMES 5
	37
fe7752ba DW	38	/* At task start time, the audit_state is set in the audit_context using
	39	a per-task filter. At syscall entry, the audit_state is augmented by
	40	the syscall filter. */
	41	enum audit_state {
	42	AUDIT_DISABLED, /* Do not create per-task audit_context.
	43	* No syscall-specific audit records can
	44	* be generated. */
fe7752ba	45	AUDIT_BUILD_CONTEXT, /* Create the per-task audit_context,
997f5b64	46	* and fill it in at syscall
fe7752ba DW	47	* entry time. This makes a full
	48	* syscall record available if some
	49	* other part of the kernel decides it
	50	* should be recorded. */
	51	AUDIT_RECORD_CONTEXT /* Create the per-task audit_context,
	52	* always fill it in at syscall entry
	53	* time, and always write out the audit
	54	* record at syscall exit time. */
	55	};
	56
	57	/* Rule lists */
cfcad62c	58	struct audit_watch;
74c3cbe3 AV	59	struct audit_tree;
	60	struct audit_chunk;
	61
fe7752ba	62	struct audit_entry {
93315ed6 AG	63	struct list_head list;
	64	struct rcu_head rcu;
	65	struct audit_krule rule;
fe7752ba DW	66	};
fe7752ba DW	67
b24a30a7 EP	68	struct audit_cap_data {
	69	kernel_cap_t permitted;
	70	kernel_cap_t inheritable;
	71	union {
	72	unsigned int fE; /* effective bit of file cap */
	73	kernel_cap_t effective; /* effective set of process */
	74	};
	75	};
	76
	77	/* When fs/namei.c:getname() is called, we store the pointer in name and
	78	* we don't let putname() free it (instead we free all of the saved
	79	* pointers at syscall exit time).
	80	*
	81	* Further, in fs/namei.c:path_lookup() we store the inode and device.
	82	*/
	83	struct audit_names {
	84	struct list_head list; /* audit_context->names_list */
	85
	86	struct filename *name;
	87	int name_len; /* number of chars to log */
	88	bool name_put; /* call __putname()? */
	89
	90	unsigned long ino;
	91	dev_t dev;
	92	umode_t mode;
	93	kuid_t uid;
	94	kgid_t gid;
	95	dev_t rdev;
	96	u32 osid;
	97	struct audit_cap_data fcap;
	98	unsigned int fcap_ver;
	99	unsigned char type; /* record type */
	100	/*
	101	* This was an allocated audit_names and not from the array of
	102	* names allocated in the task audit context. Thus this name
	103	* should be freed on syscall exit.
	104	*/
	105	bool should_free;
	106	};
	107
	108	/* The per-task audit context. */
	109	struct audit_context {
	110	int dummy; /* must be the first element */
	111	int in_syscall; /* 1 if task is in a syscall */
	112	enum audit_state state, current_state;
	113	unsigned int serial; /* serial number for record */
	114	int major; /* syscall number */
	115	struct timespec ctime; /* time of syscall entry */
	116	unsigned long argv[4]; /* syscall arguments */
	117	long return_code;/* syscall return code */
	118	u64 prio;
	119	int return_valid; /* return code is valid */
	120	/*
	121	* The names_list is the list of all audit_names collected during this
	122	* syscall. The first AUDIT_NAMES entries in the names_list will
	123	* actually be from the preallocated_names array for performance
	124	* reasons. Except during allocation they should never be referenced
	125	* through the preallocated_names array and should only be found/used
	126	* by running the names_list.
	127	*/
	128	struct audit_names preallocated_names[AUDIT_NAMES];
	129	int name_count; /* total records in names_list */
	130	struct list_head names_list; /* struct audit_names->list anchor */
	131	char filterkey; / key for rule that triggered record */
132	struct path pwd;
133	struct audit_aux_data *aux;
134	struct audit_aux_data *aux_pids;
135	struct sockaddr_storage *sockaddr;
136	size_t sockaddr_len;
137	/* Save things to print about task_struct */
138	pid_t pid, ppid;
139	kuid_t uid, euid, suid, fsuid;
140	kgid_t gid, egid, sgid, fsgid;
141	unsigned long personality;
142	int arch;
143
144	pid_t target_pid;
145	kuid_t target_auid;
146	kuid_t target_uid;
147	unsigned int target_sessionid;
148	u32 target_sid;
149	char target_comm[TASK_COMM_LEN];
150
151	struct audit_tree_refs trees, first_trees;
152	struct list_head killed_trees;
153	int tree_count;
154
155	int type;
156	union {
157	struct {
158	int nargs;
159	long args[6];
160	} socketcall;
161	struct {
162	kuid_t uid;
163	kgid_t gid;
164	umode_t mode;
165	u32 osid;
166	int has_perm;
167	uid_t perm_uid;
168	gid_t perm_gid;
169	umode_t perm_mode;
170	unsigned long qbytes;
171	} ipc;
172	struct {
173	mqd_t mqdes;
174	struct mq_attr mqstat;
175	} mq_getsetattr;
176	struct {
177	mqd_t mqdes;
178	int sigev_signo;
179	} mq_notify;
180	struct {
181	mqd_t mqdes;
182	size_t msg_len;
183	unsigned int msg_prio;
184	struct timespec abs_timeout;
185	} mq_sendrecv;
186	struct {
187	int oflag;
188	umode_t mode;
189	struct mq_attr attr;
190	} mq_open;
191	struct {
192	pid_t pid;
193	struct audit_cap_data cap;
194	} capset;
195	struct {
196	int fd;
197	int flags;
198	} mmap;
199	};
200	int fds[2];
201
202	#if AUDIT_DEBUG
203	int put_count;
204	int ino_count;
205	#endif
206	};
207
c782f242	208	extern int audit_ever_enabled;
c782f242	209
b24a30a7 EP	210	extern void audit_copy_inode(struct audit_names *name,
	211	const struct dentry *dentry,
	212	const struct inode *inode);
	213	extern void audit_log_cap(struct audit_buffer ab, char prefix,
	214	kernel_cap_t *cap);
	215	extern void audit_log_fcaps(struct audit_buffer ab, struct audit_names name);
	216	extern void audit_log_name(struct audit_context *context,
	217	struct audit_names n, struct path path,
	218	int record_num, int *call_panic);
c782f242	219
fe7752ba	220	extern int audit_pid;
fe7752ba	221
f368c07d AG	222	#define AUDIT_INODE_BUCKETS 32
	223	extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
	224
	225	static inline int audit_hash_ino(u32 ino)
	226	{
	227	return (ino & (AUDIT_INODE_BUCKETS-1));
	228	}
	229
e3d6b07b JL	230	/* Indicates that audit should log the full pathname. */
	231	#define AUDIT_NAME_FULL -1
	232
55669bfa	233	extern int audit_match_class(int class, unsigned syscall);
f368c07d	234	extern int audit_comparator(const u32 left, const u32 op, const u32 right);
ca57ec0f EB	235	extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right);
ca57ec0f EB	236	extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
bfcec708	237	extern int parent_len(const char *path);
e3d6b07b	238	extern int audit_compare_dname_path(const char dname, const char path, int plen);
9044e6bc AV	239	extern struct sk_buff * audit_make_reply(int pid, int seq, int type,
9044e6bc AV	240	int done, int multi,
b8800aa5	241	const void *payload, int size);
fe7752ba	242	extern void audit_panic(const char *message);
3dc7e315	243
9044e6bc AV	244	struct audit_netlink_list {
	245	int pid;
	246	struct sk_buff_head q;
	247	};
	248
	249	int audit_send_list(void *);
	250
3dc7e315	251	extern int selinux_audit_rule_update(void);
e1396065	252
74c3cbe3 AV	253	extern struct mutex audit_filter_mutex;
74c3cbe3 AV	254	extern void audit_free_rule_rcu(struct rcu_head *);
c782f242	255	extern struct list_head audit_filter_list[];
74c3cbe3	256
939a67fc EP	257	extern struct audit_entry audit_dupe_rule(struct audit_krule old);
939a67fc EP	258
cfcad62c	259	/* audit watch functions */
939a67fc	260	#ifdef CONFIG_AUDIT_WATCH
cfcad62c EP	261	extern void audit_put_watch(struct audit_watch *watch);
	262	extern void audit_get_watch(struct audit_watch *watch);
	263	extern int audit_to_watch(struct audit_krule krule, char path, int len, u32 op);
ae7b8f41	264	extern int audit_add_watch(struct audit_krule krule, struct list_head *list);
a05fb6cc	265	extern void audit_remove_watch_rule(struct audit_krule *krule);
cfcad62c	266	extern char audit_watch_path(struct audit_watch watch);
ae7b8f41	267	extern int audit_watch_compare(struct audit_watch *watch, unsigned long ino, dev_t dev);
939a67fc EP	268	#else
	269	#define audit_put_watch(w) {}
	270	#define audit_get_watch(w) {}
	271	#define audit_to_watch(k, p, l, o) (-EINVAL)
	272	#define audit_add_watch(k, l) (-EINVAL)
	273	#define audit_remove_watch_rule(k) BUG()
	274	#define audit_watch_path(w) ""
	275	#define audit_watch_compare(w, i, d) 0
	276
	277	#endif /* CONFIG_AUDIT_WATCH */
cfcad62c	278
74c3cbe3 AV	279	#ifdef CONFIG_AUDIT_TREE
	280	extern struct audit_chunk audit_tree_lookup(const struct inode );
	281	extern void audit_put_chunk(struct audit_chunk *);
	282	extern int audit_tree_match(struct audit_chunk , struct audit_tree );
	283	extern int audit_make_tree(struct audit_krule , char , u32);
	284	extern int audit_add_tree_rule(struct audit_krule *);
	285	extern int audit_remove_tree_rule(struct audit_krule *);
	286	extern void audit_trim_trees(void);
	287	extern int audit_tag_tree(char old, char new);
74c3cbe3 AV	288	extern const char audit_tree_path(struct audit_tree );
74c3cbe3 AV	289	extern void audit_put_tree(struct audit_tree *);
916d7576	290	extern void audit_kill_trees(struct list_head *);
74c3cbe3 AV	291	#else
	292	#define audit_remove_tree_rule(rule) BUG()
	293	#define audit_add_tree_rule(rule) -EINVAL
	294	#define audit_make_tree(rule, str, op) -EINVAL
	295	#define audit_trim_trees() (void)0
	296	#define audit_put_tree(tree) (void)0
	297	#define audit_tag_tree(old, new) -EINVAL
	298	#define audit_tree_path(rule) "" /* never called */
916d7576	299	#define audit_kill_trees(list) BUG()
74c3cbe3 AV	300	#endif
	301
	302	extern char audit_unpack_string(void , size_t , size_t);
	303
c782f242	304	extern pid_t audit_sig_pid;
cca080d9	305	extern kuid_t audit_sig_uid;
c782f242 HH	306	extern u32 audit_sig_sid;
c782f242 HH	307
e1396065	308	#ifdef CONFIG_AUDITSYSCALL
e54dc243 AG	309	extern int __audit_signal_info(int sig, struct task_struct *t);
e54dc243 AG	310	static inline int audit_signal_info(int sig, struct task_struct *t)
e1396065	311	{
e54dc243 AG	312	if (unlikely((audit_pid && t->tgid == audit_pid) \|\|
	313	(audit_signals && !audit_dummy_context())))
	314	return __audit_signal_info(sig, t);
	315	return 0;
e1396065	316	}
0590b933	317	extern void audit_filter_inodes(struct task_struct , struct audit_context );
916d7576	318	extern struct list_head *audit_killed_trees(void);
e1396065	319	#else
e54dc243	320	#define audit_signal_info(s,t) AUDIT_DISABLED
f368c07d	321	#define audit_filter_inodes(t,c) AUDIT_DISABLED
e1396065	322	#endif
916d7576 AV	323
916d7576 AV	324	extern struct mutex audit_cmd_mutex;