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TOMOYO Linux Cross Reference
Linux/include/linux/audit.h

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  1 /* audit.h -- Auditing support
  2  *
  3  * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
  4  * All Rights Reserved.
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License as published by
  8  * the Free Software Foundation; either version 2 of the License, or
  9  * (at your option) any later version.
 10  *
 11  * This program is distributed in the hope that it will be useful,
 12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  * GNU General Public License for more details.
 15  *
 16  * You should have received a copy of the GNU General Public License
 17  * along with this program; if not, write to the Free Software
 18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 19  *
 20  * Written by Rickard E. (Rik) Faith <faith@redhat.com>
 21  *
 22  */
 23 #ifndef _LINUX_AUDIT_H_
 24 #define _LINUX_AUDIT_H_
 25 
 26 #include <linux/sched.h>
 27 #include <uapi/linux/audit.h>
 28 
 29 struct audit_sig_info {
 30         uid_t           uid;
 31         pid_t           pid;
 32         char            ctx[0];
 33 };
 34 
 35 struct audit_buffer;
 36 struct audit_context;
 37 struct inode;
 38 struct netlink_skb_parms;
 39 struct path;
 40 struct linux_binprm;
 41 struct mq_attr;
 42 struct mqstat;
 43 struct audit_watch;
 44 struct audit_tree;
 45 
 46 struct audit_krule {
 47         int                     vers_ops;
 48         u32                     flags;
 49         u32                     listnr;
 50         u32                     action;
 51         u32                     mask[AUDIT_BITMASK_SIZE];
 52         u32                     buflen; /* for data alloc on list rules */
 53         u32                     field_count;
 54         char                    *filterkey; /* ties events to rules */
 55         struct audit_field      *fields;
 56         struct audit_field      *arch_f; /* quick access to arch field */
 57         struct audit_field      *inode_f; /* quick access to an inode field */
 58         struct audit_watch      *watch; /* associated watch */
 59         struct audit_tree       *tree;  /* associated watched tree */
 60         struct list_head        rlist;  /* entry in audit_{watch,tree}.rules list */
 61         struct list_head        list;   /* for AUDIT_LIST* purposes only */
 62         u64                     prio;
 63 };
 64 
 65 struct audit_field {
 66         u32                             type;
 67         u32                             val;
 68         kuid_t                          uid;
 69         kgid_t                          gid;
 70         u32                             op;
 71         char                            *lsm_str;
 72         void                            *lsm_rule;
 73 };
 74 
 75 extern int __init audit_register_class(int class, unsigned *list);
 76 extern int audit_classify_syscall(int abi, unsigned syscall);
 77 extern int audit_classify_arch(int arch);
 78 
 79 /* audit_names->type values */
 80 #define AUDIT_TYPE_UNKNOWN      0       /* we don't know yet */
 81 #define AUDIT_TYPE_NORMAL       1       /* a "normal" audit record */
 82 #define AUDIT_TYPE_PARENT       2       /* a parent audit record */
 83 #define AUDIT_TYPE_CHILD_DELETE 3       /* a child being deleted */
 84 #define AUDIT_TYPE_CHILD_CREATE 4       /* a child being created */
 85 
 86 struct filename;
 87 
 88 #ifdef CONFIG_AUDITSYSCALL
 89 /* These are defined in auditsc.c */
 90                                 /* Public API */
 91 extern int  audit_alloc(struct task_struct *task);
 92 extern void __audit_free(struct task_struct *task);
 93 extern void __audit_syscall_entry(int arch,
 94                                   int major, unsigned long a0, unsigned long a1,
 95                                   unsigned long a2, unsigned long a3);
 96 extern void __audit_syscall_exit(int ret_success, long ret_value);
 97 extern struct filename *__audit_reusename(const __user char *uptr);
 98 extern void __audit_getname(struct filename *name);
 99 extern void audit_putname(struct filename *name);
100 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
101                                 unsigned int parent);
102 extern void __audit_inode_child(const struct inode *parent,
103                                 const struct dentry *dentry,
104                                 const unsigned char type);
105 extern void __audit_seccomp(unsigned long syscall, long signr, int code);
106 extern void __audit_ptrace(struct task_struct *t);
107 
108 static inline int audit_dummy_context(void)
109 {
110         void *p = current->audit_context;
111         return !p || *(int *)p;
112 }
113 static inline void audit_free(struct task_struct *task)
114 {
115         if (unlikely(task->audit_context))
116                 __audit_free(task);
117 }
118 static inline void audit_syscall_entry(int arch, int major, unsigned long a0,
119                                        unsigned long a1, unsigned long a2,
120                                        unsigned long a3)
121 {
122         if (unlikely(!audit_dummy_context()))
123                 __audit_syscall_entry(arch, major, a0, a1, a2, a3);
124 }
125 static inline void audit_syscall_exit(void *pt_regs)
126 {
127         if (unlikely(current->audit_context)) {
128                 int success = is_syscall_success(pt_regs);
129                 int return_code = regs_return_value(pt_regs);
130 
131                 __audit_syscall_exit(success, return_code);
132         }
133 }
134 static inline struct filename *audit_reusename(const __user char *name)
135 {
136         if (unlikely(!audit_dummy_context()))
137                 return __audit_reusename(name);
138         return NULL;
139 }
140 static inline void audit_getname(struct filename *name)
141 {
142         if (unlikely(!audit_dummy_context()))
143                 __audit_getname(name);
144 }
145 static inline void audit_inode(struct filename *name, const struct dentry *dentry,
146                                 unsigned int parent) {
147         if (unlikely(!audit_dummy_context()))
148                 __audit_inode(name, dentry, parent);
149 }
150 static inline void audit_inode_child(const struct inode *parent,
151                                      const struct dentry *dentry,
152                                      const unsigned char type) {
153         if (unlikely(!audit_dummy_context()))
154                 __audit_inode_child(parent, dentry, type);
155 }
156 void audit_core_dumps(long signr);
157 
158 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
159 {
160         /* Force a record to be reported if a signal was delivered. */
161         if (signr || unlikely(!audit_dummy_context()))
162                 __audit_seccomp(syscall, signr, code);
163 }
164 
165 static inline void audit_ptrace(struct task_struct *t)
166 {
167         if (unlikely(!audit_dummy_context()))
168                 __audit_ptrace(t);
169 }
170 
171                                 /* Private API (for audit.c only) */
172 extern unsigned int audit_serial(void);
173 extern int auditsc_get_stamp(struct audit_context *ctx,
174                               struct timespec *t, unsigned int *serial);
175 extern int audit_set_loginuid(kuid_t loginuid);
176 
177 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
178 {
179         return tsk->loginuid;
180 }
181 
182 static inline int audit_get_sessionid(struct task_struct *tsk)
183 {
184         return tsk->sessionid;
185 }
186 
187 extern void audit_log_task_context(struct audit_buffer *ab);
188 extern void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk);
189 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
190 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
191 extern int __audit_bprm(struct linux_binprm *bprm);
192 extern void __audit_socketcall(int nargs, unsigned long *args);
193 extern int __audit_sockaddr(int len, void *addr);
194 extern void __audit_fd_pair(int fd1, int fd2);
195 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
196 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
197 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
198 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
199 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
200                                   const struct cred *new,
201                                   const struct cred *old);
202 extern void __audit_log_capset(pid_t pid, const struct cred *new, const struct cred *old);
203 extern void __audit_mmap_fd(int fd, int flags);
204 
205 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
206 {
207         if (unlikely(!audit_dummy_context()))
208                 __audit_ipc_obj(ipcp);
209 }
210 static inline void audit_fd_pair(int fd1, int fd2)
211 {
212         if (unlikely(!audit_dummy_context()))
213                 __audit_fd_pair(fd1, fd2);
214 }
215 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
216 {
217         if (unlikely(!audit_dummy_context()))
218                 __audit_ipc_set_perm(qbytes, uid, gid, mode);
219 }
220 static inline int audit_bprm(struct linux_binprm *bprm)
221 {
222         if (unlikely(!audit_dummy_context()))
223                 return __audit_bprm(bprm);
224         return 0;
225 }
226 static inline void audit_socketcall(int nargs, unsigned long *args)
227 {
228         if (unlikely(!audit_dummy_context()))
229                 __audit_socketcall(nargs, args);
230 }
231 static inline int audit_sockaddr(int len, void *addr)
232 {
233         if (unlikely(!audit_dummy_context()))
234                 return __audit_sockaddr(len, addr);
235         return 0;
236 }
237 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
238 {
239         if (unlikely(!audit_dummy_context()))
240                 __audit_mq_open(oflag, mode, attr);
241 }
242 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
243 {
244         if (unlikely(!audit_dummy_context()))
245                 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
246 }
247 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
248 {
249         if (unlikely(!audit_dummy_context()))
250                 __audit_mq_notify(mqdes, notification);
251 }
252 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
253 {
254         if (unlikely(!audit_dummy_context()))
255                 __audit_mq_getsetattr(mqdes, mqstat);
256 }
257 
258 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
259                                        const struct cred *new,
260                                        const struct cred *old)
261 {
262         if (unlikely(!audit_dummy_context()))
263                 return __audit_log_bprm_fcaps(bprm, new, old);
264         return 0;
265 }
266 
267 static inline void audit_log_capset(pid_t pid, const struct cred *new,
268                                    const struct cred *old)
269 {
270         if (unlikely(!audit_dummy_context()))
271                 __audit_log_capset(pid, new, old);
272 }
273 
274 static inline void audit_mmap_fd(int fd, int flags)
275 {
276         if (unlikely(!audit_dummy_context()))
277                 __audit_mmap_fd(fd, flags);
278 }
279 
280 extern int audit_n_rules;
281 extern int audit_signals;
282 #else /* CONFIG_AUDITSYSCALL */
283 static inline int audit_alloc(struct task_struct *task)
284 {
285         return 0;
286 }
287 static inline void audit_free(struct task_struct *task)
288 { }
289 static inline void audit_syscall_entry(int arch, int major, unsigned long a0,
290                                        unsigned long a1, unsigned long a2,
291                                        unsigned long a3)
292 { }
293 static inline void audit_syscall_exit(void *pt_regs)
294 { }
295 static inline int audit_dummy_context(void)
296 {
297         return 1;
298 }
299 static inline struct filename *audit_reusename(const __user char *name)
300 {
301         return NULL;
302 }
303 static inline void audit_getname(struct filename *name)
304 { }
305 static inline void audit_putname(struct filename *name)
306 { }
307 static inline void __audit_inode(struct filename *name,
308                                         const struct dentry *dentry,
309                                         unsigned int parent)
310 { }
311 static inline void __audit_inode_child(const struct inode *parent,
312                                         const struct dentry *dentry,
313                                         const unsigned char type)
314 { }
315 static inline void audit_inode(struct filename *name,
316                                 const struct dentry *dentry,
317                                 unsigned int parent)
318 { }
319 static inline void audit_inode_child(const struct inode *parent,
320                                      const struct dentry *dentry,
321                                      const unsigned char type)
322 { }
323 static inline void audit_core_dumps(long signr)
324 { }
325 static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
326 { }
327 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
328 { }
329 static inline int auditsc_get_stamp(struct audit_context *ctx,
330                               struct timespec *t, unsigned int *serial)
331 {
332         return 0;
333 }
334 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
335 {
336         return INVALID_UID;
337 }
338 static inline int audit_get_sessionid(struct task_struct *tsk)
339 {
340         return -1;
341 }
342 static inline void audit_log_task_context(struct audit_buffer *ab)
343 { }
344 static inline void audit_log_task_info(struct audit_buffer *ab,
345                                        struct task_struct *tsk)
346 { }
347 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
348 { }
349 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
350                                         gid_t gid, umode_t mode)
351 { }
352 static inline int audit_bprm(struct linux_binprm *bprm)
353 {
354         return 0;
355 }
356 static inline void audit_socketcall(int nargs, unsigned long *args)
357 { }
358 static inline void audit_fd_pair(int fd1, int fd2)
359 { }
360 static inline int audit_sockaddr(int len, void *addr)
361 {
362         return 0;
363 }
364 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
365 { }
366 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
367                                      unsigned int msg_prio,
368                                      const struct timespec *abs_timeout)
369 { }
370 static inline void audit_mq_notify(mqd_t mqdes,
371                                    const struct sigevent *notification)
372 { }
373 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
374 { }
375 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
376                                        const struct cred *new,
377                                        const struct cred *old)
378 {
379         return 0;
380 }
381 static inline void audit_log_capset(pid_t pid, const struct cred *new,
382                                    const struct cred *old)
383 { }
384 static inline void audit_mmap_fd(int fd, int flags)
385 { }
386 static inline void audit_ptrace(struct task_struct *t)
387 { }
388 #define audit_n_rules 0
389 #define audit_signals 0
390 #endif /* CONFIG_AUDITSYSCALL */
391 
392 #ifdef CONFIG_AUDIT
393 /* These are defined in audit.c */
394                                 /* Public API */
395 extern __printf(4, 5)
396 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
397                const char *fmt, ...);
398 
399 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
400 extern __printf(2, 3)
401 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
402 extern void                 audit_log_end(struct audit_buffer *ab);
403 extern int                  audit_string_contains_control(const char *string,
404                                                           size_t len);
405 extern void                 audit_log_n_hex(struct audit_buffer *ab,
406                                           const unsigned char *buf,
407                                           size_t len);
408 extern void                 audit_log_n_string(struct audit_buffer *ab,
409                                                const char *buf,
410                                                size_t n);
411 extern void                 audit_log_n_untrustedstring(struct audit_buffer *ab,
412                                                         const char *string,
413                                                         size_t n);
414 extern void                 audit_log_untrustedstring(struct audit_buffer *ab,
415                                                       const char *string);
416 extern void                 audit_log_d_path(struct audit_buffer *ab,
417                                              const char *prefix,
418                                              const struct path *path);
419 extern void                 audit_log_key(struct audit_buffer *ab,
420                                           char *key);
421 extern void                 audit_log_link_denied(const char *operation,
422                                                   struct path *link);
423 extern void                 audit_log_lost(const char *message);
424 #ifdef CONFIG_SECURITY
425 extern void                 audit_log_secctx(struct audit_buffer *ab, u32 secid);
426 #else
427 static inline void          audit_log_secctx(struct audit_buffer *ab, u32 secid)
428 { }
429 #endif
430 
431 extern int                  audit_update_lsm_rules(void);
432 
433                                 /* Private API (for audit.c only) */
434 extern int audit_filter_user(void);
435 extern int audit_filter_type(int type);
436 extern int  audit_receive_filter(int type, int pid, int seq,
437                                 void *data, size_t datasz, kuid_t loginuid,
438                                 u32 sessionid, u32 sid);
439 extern int audit_enabled;
440 #else /* CONFIG_AUDIT */
441 static inline __printf(4, 5)
442 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
443                const char *fmt, ...)
444 { }
445 static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
446                                                    gfp_t gfp_mask, int type)
447 {
448         return NULL;
449 }
450 static inline __printf(2, 3)
451 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
452 { }
453 static inline void audit_log_end(struct audit_buffer *ab)
454 { }
455 static inline void audit_log_n_hex(struct audit_buffer *ab,
456                                    const unsigned char *buf, size_t len)
457 { }
458 static inline void audit_log_n_string(struct audit_buffer *ab,
459                                       const char *buf, size_t n)
460 { }
461 static inline void  audit_log_n_untrustedstring(struct audit_buffer *ab,
462                                                 const char *string, size_t n)
463 { }
464 static inline void audit_log_untrustedstring(struct audit_buffer *ab,
465                                              const char *string)
466 { }
467 static inline void audit_log_d_path(struct audit_buffer *ab,
468                                     const char *prefix,
469                                     const struct path *path)
470 { }
471 static inline void audit_log_key(struct audit_buffer *ab, char *key)
472 { }
473 static inline void audit_log_link_denied(const char *string,
474                                          const struct path *link)
475 { }
476 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
477 { }
478 #define audit_enabled 0
479 #endif /* CONFIG_AUDIT */
480 static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
481 {
482         audit_log_n_string(ab, buf, strlen(buf));
483 }
484 
485 #endif
486 

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