audit: fix event coverage of AUDIT_ANOM_LINK
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / kernel / audit.h
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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>
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26
27/* 0 = no checking
28 1 = put_count checking
29 2 = verbose put_count checking
30*/
31#define AUDIT_DEBUG 0
32
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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
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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. */
41enum 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
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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 58struct audit_watch;
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59struct audit_tree;
60struct audit_chunk;
61
fe7752ba 62struct audit_entry {
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63 struct list_head list;
64 struct rcu_head rcu;
65 struct audit_krule rule;
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66};
67
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68struct 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 */
83struct 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. */
109struct 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#ifdef CONFIG_AUDIT
b24a30a7 209extern int audit_enabled;
c782f242 210extern int audit_ever_enabled;
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211
212extern void audit_copy_inode(struct audit_names *name,
213 const struct dentry *dentry,
214 const struct inode *inode);
215extern void audit_log_cap(struct audit_buffer *ab, char *prefix,
216 kernel_cap_t *cap);
217extern void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name);
218extern void audit_log_name(struct audit_context *context,
219 struct audit_names *n, struct path *path,
220 int record_num, int *call_panic);
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221#endif
222
fe7752ba 223extern int audit_pid;
fe7752ba 224
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225#define AUDIT_INODE_BUCKETS 32
226extern struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS];
227
228static inline int audit_hash_ino(u32 ino)
229{
230 return (ino & (AUDIT_INODE_BUCKETS-1));
231}
232
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233/* Indicates that audit should log the full pathname. */
234#define AUDIT_NAME_FULL -1
235
55669bfa 236extern int audit_match_class(int class, unsigned syscall);
f368c07d 237extern int audit_comparator(const u32 left, const u32 op, const u32 right);
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238extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right);
239extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
bfcec708 240extern int parent_len(const char *path);
e3d6b07b 241extern int audit_compare_dname_path(const char *dname, const char *path, int plen);
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242extern struct sk_buff * audit_make_reply(int pid, int seq, int type,
243 int done, int multi,
b8800aa5 244 const void *payload, int size);
fe7752ba 245extern void audit_panic(const char *message);
3dc7e315 246
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247struct audit_netlink_list {
248 int pid;
249 struct sk_buff_head q;
250};
251
252int audit_send_list(void *);
253
3dc7e315 254extern int selinux_audit_rule_update(void);
e1396065 255
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256extern struct mutex audit_filter_mutex;
257extern void audit_free_rule_rcu(struct rcu_head *);
c782f242 258extern struct list_head audit_filter_list[];
74c3cbe3 259
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260extern struct audit_entry *audit_dupe_rule(struct audit_krule *old);
261
cfcad62c 262/* audit watch functions */
939a67fc 263#ifdef CONFIG_AUDIT_WATCH
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264extern void audit_put_watch(struct audit_watch *watch);
265extern void audit_get_watch(struct audit_watch *watch);
266extern int audit_to_watch(struct audit_krule *krule, char *path, int len, u32 op);
ae7b8f41 267extern int audit_add_watch(struct audit_krule *krule, struct list_head **list);
a05fb6cc 268extern void audit_remove_watch_rule(struct audit_krule *krule);
cfcad62c 269extern char *audit_watch_path(struct audit_watch *watch);
ae7b8f41 270extern int audit_watch_compare(struct audit_watch *watch, unsigned long ino, dev_t dev);
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271#else
272#define audit_put_watch(w) {}
273#define audit_get_watch(w) {}
274#define audit_to_watch(k, p, l, o) (-EINVAL)
275#define audit_add_watch(k, l) (-EINVAL)
276#define audit_remove_watch_rule(k) BUG()
277#define audit_watch_path(w) ""
278#define audit_watch_compare(w, i, d) 0
279
280#endif /* CONFIG_AUDIT_WATCH */
cfcad62c 281
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282#ifdef CONFIG_AUDIT_TREE
283extern struct audit_chunk *audit_tree_lookup(const struct inode *);
284extern void audit_put_chunk(struct audit_chunk *);
285extern int audit_tree_match(struct audit_chunk *, struct audit_tree *);
286extern int audit_make_tree(struct audit_krule *, char *, u32);
287extern int audit_add_tree_rule(struct audit_krule *);
288extern int audit_remove_tree_rule(struct audit_krule *);
289extern void audit_trim_trees(void);
290extern int audit_tag_tree(char *old, char *new);
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291extern const char *audit_tree_path(struct audit_tree *);
292extern void audit_put_tree(struct audit_tree *);
916d7576 293extern void audit_kill_trees(struct list_head *);
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294#else
295#define audit_remove_tree_rule(rule) BUG()
296#define audit_add_tree_rule(rule) -EINVAL
297#define audit_make_tree(rule, str, op) -EINVAL
298#define audit_trim_trees() (void)0
299#define audit_put_tree(tree) (void)0
300#define audit_tag_tree(old, new) -EINVAL
301#define audit_tree_path(rule) "" /* never called */
916d7576 302#define audit_kill_trees(list) BUG()
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303#endif
304
305extern char *audit_unpack_string(void **, size_t *, size_t);
306
c782f242 307extern pid_t audit_sig_pid;
cca080d9 308extern kuid_t audit_sig_uid;
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309extern u32 audit_sig_sid;
310
e1396065 311#ifdef CONFIG_AUDITSYSCALL
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312extern int __audit_signal_info(int sig, struct task_struct *t);
313static inline int audit_signal_info(int sig, struct task_struct *t)
e1396065 314{
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315 if (unlikely((audit_pid && t->tgid == audit_pid) ||
316 (audit_signals && !audit_dummy_context())))
317 return __audit_signal_info(sig, t);
318 return 0;
e1396065 319}
0590b933 320extern void audit_filter_inodes(struct task_struct *, struct audit_context *);
916d7576 321extern struct list_head *audit_killed_trees(void);
e1396065 322#else
e54dc243 323#define audit_signal_info(s,t) AUDIT_DISABLED
f368c07d 324#define audit_filter_inodes(t,c) AUDIT_DISABLED
e1396065 325#endif
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326
327extern struct mutex audit_cmd_mutex;