1 /* audit.h -- Auditing support
3 * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
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.
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.
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
23 #ifndef _LINUX_AUDIT_H_
24 #define _LINUX_AUDIT_H_
26 #include <linux/sched.h>
27 #include <linux/ptrace.h>
28 #include <uapi/linux/audit.h>
30 #define AUDIT_INO_UNSET ((unsigned long)-1)
31 #define AUDIT_DEV_UNSET ((dev_t)-1)
33 struct audit_sig_info {
42 struct netlink_skb_parms;
56 u32 mask[AUDIT_BITMASK_SIZE];
57 u32 buflen; /* for data alloc on list rules */
59 char *filterkey; /* ties events to rules */
60 struct audit_field *fields;
61 struct audit_field *arch_f; /* quick access to arch field */
62 struct audit_field *inode_f; /* quick access to an inode field */
63 struct audit_watch *watch; /* associated watch */
64 struct audit_tree *tree; /* associated watched tree */
65 struct audit_fsnotify_mark *exe;
66 struct list_head rlist; /* entry in audit_{watch,tree}.rules list */
67 struct list_head list; /* for AUDIT_LIST* purposes only */
71 /* Flag to indicate legacy AUDIT_LOGINUID unset usage */
72 #define AUDIT_LOGINUID_LEGACY 0x1
88 extern int is_audit_feature_set(int which);
90 extern int __init audit_register_class(int class, unsigned *list);
91 extern int audit_classify_syscall(int abi, unsigned syscall);
92 extern int audit_classify_arch(int arch);
93 /* only for compat system calls */
94 extern unsigned compat_write_class[];
95 extern unsigned compat_read_class[];
96 extern unsigned compat_dir_class[];
97 extern unsigned compat_chattr_class[];
98 extern unsigned compat_signal_class[];
100 extern int audit_classify_compat_syscall(int abi, unsigned syscall);
102 /* audit_names->type values */
103 #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
104 #define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
105 #define AUDIT_TYPE_PARENT 2 /* a parent audit record */
106 #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
107 #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
109 /* maximized args number that audit_socketcall can process */
110 #define AUDITSC_ARGS 6
112 /* bit values for ->signal->audit_tty */
113 #define AUDIT_TTY_ENABLE BIT(0)
114 #define AUDIT_TTY_LOG_PASSWD BIT(1)
120 #define AUDIT_LOCKED 2
122 /* These are defined in audit.c */
124 extern __printf(4, 5)
125 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
126 const char *fmt, ...);
128 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
129 extern __printf(2, 3)
130 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
131 extern void audit_log_end(struct audit_buffer *ab);
132 extern bool audit_string_contains_control(const char *string,
134 extern void audit_log_n_hex(struct audit_buffer *ab,
135 const unsigned char *buf,
137 extern void audit_log_n_string(struct audit_buffer *ab,
140 extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
143 extern void audit_log_untrustedstring(struct audit_buffer *ab,
145 extern void audit_log_d_path(struct audit_buffer *ab,
147 const struct path *path);
148 extern void audit_log_key(struct audit_buffer *ab,
150 extern void audit_log_link_denied(const char *operation);
151 extern void audit_log_lost(const char *message);
153 extern int audit_log_task_context(struct audit_buffer *ab);
154 extern void audit_log_task_info(struct audit_buffer *ab);
156 extern int audit_update_lsm_rules(void);
158 /* Private API (for audit.c only) */
159 extern int audit_rule_change(int type, int seq, void *data, size_t datasz);
160 extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
162 extern u32 audit_enabled;
163 #else /* CONFIG_AUDIT */
164 static inline __printf(4, 5)
165 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
166 const char *fmt, ...)
168 static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
169 gfp_t gfp_mask, int type)
173 static inline __printf(2, 3)
174 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
176 static inline void audit_log_end(struct audit_buffer *ab)
178 static inline void audit_log_n_hex(struct audit_buffer *ab,
179 const unsigned char *buf, size_t len)
181 static inline void audit_log_n_string(struct audit_buffer *ab,
182 const char *buf, size_t n)
184 static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
185 const char *string, size_t n)
187 static inline void audit_log_untrustedstring(struct audit_buffer *ab,
190 static inline void audit_log_d_path(struct audit_buffer *ab,
192 const struct path *path)
194 static inline void audit_log_key(struct audit_buffer *ab, char *key)
196 static inline void audit_log_link_denied(const char *string)
198 static inline int audit_log_task_context(struct audit_buffer *ab)
202 static inline void audit_log_task_info(struct audit_buffer *ab)
204 #define audit_enabled AUDIT_OFF
205 #endif /* CONFIG_AUDIT */
207 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
208 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
210 #define audit_is_compat(arch) false
213 #ifdef CONFIG_AUDITSYSCALL
214 #include <asm/syscall.h> /* for syscall_get_arch() */
216 /* These are defined in auditsc.c */
218 extern int audit_alloc(struct task_struct *task);
219 extern void __audit_free(struct task_struct *task);
220 extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
221 unsigned long a2, unsigned long a3);
222 extern void __audit_syscall_exit(int ret_success, long ret_value);
223 extern struct filename *__audit_reusename(const __user char *uptr);
224 extern void __audit_getname(struct filename *name);
226 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
227 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
228 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
230 extern void __audit_file(const struct file *);
231 extern void __audit_inode_child(struct inode *parent,
232 const struct dentry *dentry,
233 const unsigned char type);
234 extern void audit_seccomp(unsigned long syscall, long signr, int code);
235 extern void audit_seccomp_actions_logged(const char *names,
236 const char *old_names, int res);
237 extern void __audit_ptrace(struct task_struct *t);
239 static inline void audit_set_context(struct task_struct *task, struct audit_context *ctx)
241 task->audit_context = ctx;
244 static inline struct audit_context *audit_context(void)
246 return current->audit_context;
249 static inline bool audit_dummy_context(void)
251 void *p = audit_context();
252 return !p || *(int *)p;
254 static inline void audit_free(struct task_struct *task)
256 if (unlikely(task->audit_context))
259 static inline void audit_syscall_entry(int major, unsigned long a0,
260 unsigned long a1, unsigned long a2,
263 if (unlikely(audit_context()))
264 __audit_syscall_entry(major, a0, a1, a2, a3);
266 static inline void audit_syscall_exit(void *pt_regs)
268 if (unlikely(audit_context())) {
269 int success = is_syscall_success(pt_regs);
270 long return_code = regs_return_value(pt_regs);
272 __audit_syscall_exit(success, return_code);
275 static inline struct filename *audit_reusename(const __user char *name)
277 if (unlikely(!audit_dummy_context()))
278 return __audit_reusename(name);
281 static inline void audit_getname(struct filename *name)
283 if (unlikely(!audit_dummy_context()))
284 __audit_getname(name);
286 static inline void audit_inode(struct filename *name,
287 const struct dentry *dentry,
288 unsigned int parent) {
289 if (unlikely(!audit_dummy_context())) {
290 unsigned int flags = 0;
292 flags |= AUDIT_INODE_PARENT;
293 __audit_inode(name, dentry, flags);
296 static inline void audit_file(struct file *file)
298 if (unlikely(!audit_dummy_context()))
301 static inline void audit_inode_parent_hidden(struct filename *name,
302 const struct dentry *dentry)
304 if (unlikely(!audit_dummy_context()))
305 __audit_inode(name, dentry,
306 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
308 static inline void audit_inode_child(struct inode *parent,
309 const struct dentry *dentry,
310 const unsigned char type) {
311 if (unlikely(!audit_dummy_context()))
312 __audit_inode_child(parent, dentry, type);
314 void audit_core_dumps(long signr);
316 static inline void audit_ptrace(struct task_struct *t)
318 if (unlikely(!audit_dummy_context()))
322 /* Private API (for audit.c only) */
323 extern unsigned int audit_serial(void);
324 extern int auditsc_get_stamp(struct audit_context *ctx,
325 struct timespec64 *t, unsigned int *serial);
326 extern int audit_set_loginuid(kuid_t loginuid);
328 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
330 return tsk->loginuid;
333 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
335 return tsk->sessionid;
338 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
339 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
340 extern void __audit_bprm(struct linux_binprm *bprm);
341 extern int __audit_socketcall(int nargs, unsigned long *args);
342 extern int __audit_sockaddr(int len, void *addr);
343 extern void __audit_fd_pair(int fd1, int fd2);
344 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
345 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec64 *abs_timeout);
346 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
347 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
348 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
349 const struct cred *new,
350 const struct cred *old);
351 extern void __audit_log_capset(const struct cred *new, const struct cred *old);
352 extern void __audit_mmap_fd(int fd, int flags);
353 extern void __audit_log_kern_module(char *name);
354 extern void __audit_fanotify(unsigned int response);
356 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
358 if (unlikely(!audit_dummy_context()))
359 __audit_ipc_obj(ipcp);
361 static inline void audit_fd_pair(int fd1, int fd2)
363 if (unlikely(!audit_dummy_context()))
364 __audit_fd_pair(fd1, fd2);
366 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
368 if (unlikely(!audit_dummy_context()))
369 __audit_ipc_set_perm(qbytes, uid, gid, mode);
371 static inline void audit_bprm(struct linux_binprm *bprm)
373 if (unlikely(!audit_dummy_context()))
376 static inline int audit_socketcall(int nargs, unsigned long *args)
378 if (unlikely(!audit_dummy_context()))
379 return __audit_socketcall(nargs, args);
383 static inline int audit_socketcall_compat(int nargs, u32 *args)
385 unsigned long a[AUDITSC_ARGS];
388 if (audit_dummy_context())
391 for (i = 0; i < nargs; i++)
392 a[i] = (unsigned long)args[i];
393 return __audit_socketcall(nargs, a);
396 static inline int audit_sockaddr(int len, void *addr)
398 if (unlikely(!audit_dummy_context()))
399 return __audit_sockaddr(len, addr);
402 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
404 if (unlikely(!audit_dummy_context()))
405 __audit_mq_open(oflag, mode, attr);
407 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec64 *abs_timeout)
409 if (unlikely(!audit_dummy_context()))
410 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
412 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
414 if (unlikely(!audit_dummy_context()))
415 __audit_mq_notify(mqdes, notification);
417 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
419 if (unlikely(!audit_dummy_context()))
420 __audit_mq_getsetattr(mqdes, mqstat);
423 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
424 const struct cred *new,
425 const struct cred *old)
427 if (unlikely(!audit_dummy_context()))
428 return __audit_log_bprm_fcaps(bprm, new, old);
432 static inline void audit_log_capset(const struct cred *new,
433 const struct cred *old)
435 if (unlikely(!audit_dummy_context()))
436 __audit_log_capset(new, old);
439 static inline void audit_mmap_fd(int fd, int flags)
441 if (unlikely(!audit_dummy_context()))
442 __audit_mmap_fd(fd, flags);
445 static inline void audit_log_kern_module(char *name)
447 if (!audit_dummy_context())
448 __audit_log_kern_module(name);
451 static inline void audit_fanotify(unsigned int response)
453 if (!audit_dummy_context())
454 __audit_fanotify(response);
457 extern int audit_n_rules;
458 extern int audit_signals;
459 #else /* CONFIG_AUDITSYSCALL */
460 static inline int audit_alloc(struct task_struct *task)
464 static inline void audit_free(struct task_struct *task)
466 static inline void audit_syscall_entry(int major, unsigned long a0,
467 unsigned long a1, unsigned long a2,
470 static inline void audit_syscall_exit(void *pt_regs)
472 static inline bool audit_dummy_context(void)
476 static inline void audit_set_context(struct task_struct *task, struct audit_context *ctx)
478 static inline struct audit_context *audit_context(void)
482 static inline struct filename *audit_reusename(const __user char *name)
486 static inline void audit_getname(struct filename *name)
488 static inline void __audit_inode(struct filename *name,
489 const struct dentry *dentry,
492 static inline void __audit_inode_child(struct inode *parent,
493 const struct dentry *dentry,
494 const unsigned char type)
496 static inline void audit_inode(struct filename *name,
497 const struct dentry *dentry,
500 static inline void audit_file(struct file *file)
503 static inline void audit_inode_parent_hidden(struct filename *name,
504 const struct dentry *dentry)
506 static inline void audit_inode_child(struct inode *parent,
507 const struct dentry *dentry,
508 const unsigned char type)
510 static inline void audit_core_dumps(long signr)
512 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
514 static inline void audit_seccomp_actions_logged(const char *names,
515 const char *old_names, int res)
517 static inline int auditsc_get_stamp(struct audit_context *ctx,
518 struct timespec64 *t, unsigned int *serial)
522 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
526 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
528 return AUDIT_SID_UNSET;
530 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
532 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
533 gid_t gid, umode_t mode)
535 static inline void audit_bprm(struct linux_binprm *bprm)
537 static inline int audit_socketcall(int nargs, unsigned long *args)
542 static inline int audit_socketcall_compat(int nargs, u32 *args)
547 static inline void audit_fd_pair(int fd1, int fd2)
549 static inline int audit_sockaddr(int len, void *addr)
553 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
555 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
556 unsigned int msg_prio,
557 const struct timespec64 *abs_timeout)
559 static inline void audit_mq_notify(mqd_t mqdes,
560 const struct sigevent *notification)
562 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
564 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
565 const struct cred *new,
566 const struct cred *old)
570 static inline void audit_log_capset(const struct cred *new,
571 const struct cred *old)
573 static inline void audit_mmap_fd(int fd, int flags)
576 static inline void audit_log_kern_module(char *name)
580 static inline void audit_fanotify(unsigned int response)
583 static inline void audit_ptrace(struct task_struct *t)
585 #define audit_n_rules 0
586 #define audit_signals 0
587 #endif /* CONFIG_AUDITSYSCALL */
589 static inline bool audit_loginuid_set(struct task_struct *tsk)
591 return uid_valid(audit_get_loginuid(tsk));
594 static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
596 audit_log_n_string(ab, buf, strlen(buf));