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
20 * Written by Rickard E. (Rik) Faith <faith@redhat.com>
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>
29 #include <linux/tty.h>
31 #define AUDIT_INO_UNSET ((unsigned long)-1)
32 #define AUDIT_DEV_UNSET ((dev_t)-1)
34 struct audit_sig_info {
43 struct netlink_skb_parms;
57 u32 mask[AUDIT_BITMASK_SIZE];
58 u32 buflen; /* for data alloc on list rules */
60 char *filterkey; /* ties events to rules */
61 struct audit_field *fields;
62 struct audit_field *arch_f; /* quick access to arch field */
63 struct audit_field *inode_f; /* quick access to an inode field */
64 struct audit_watch *watch; /* associated watch */
65 struct audit_tree *tree; /* associated watched tree */
66 struct audit_fsnotify_mark *exe;
67 struct list_head rlist; /* entry in audit_{watch,tree}.rules list */
68 struct list_head list; /* for AUDIT_LIST* purposes only */
72 /* Flag to indicate legacy AUDIT_LOGINUID unset usage */
73 #define AUDIT_LOGINUID_LEGACY 0x1
89 extern int is_audit_feature_set(int which);
91 extern int __init audit_register_class(int class, unsigned *list);
92 extern int audit_classify_syscall(int abi, unsigned syscall);
93 extern int audit_classify_arch(int arch);
94 /* only for compat system calls */
95 extern unsigned compat_write_class[];
96 extern unsigned compat_read_class[];
97 extern unsigned compat_dir_class[];
98 extern unsigned compat_chattr_class[];
99 extern unsigned compat_signal_class[];
101 extern int audit_classify_compat_syscall(int abi, unsigned syscall);
103 /* audit_names->type values */
104 #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
105 #define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
106 #define AUDIT_TYPE_PARENT 2 /* a parent audit record */
107 #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
108 #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
110 /* maximized args number that audit_socketcall can process */
111 #define AUDITSC_ARGS 6
115 extern void audit_log_session_info(struct audit_buffer *ab);
117 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
118 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
120 #define audit_is_compat(arch) false
123 #ifdef CONFIG_AUDITSYSCALL
124 #include <asm/syscall.h> /* for syscall_get_arch() */
126 /* These are defined in auditsc.c */
128 extern int audit_alloc(struct task_struct *task);
129 extern void __audit_free(struct task_struct *task);
130 extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
131 unsigned long a2, unsigned long a3);
132 extern void __audit_syscall_exit(int ret_success, long ret_value);
133 extern struct filename *__audit_reusename(const __user char *uptr);
134 extern void __audit_getname(struct filename *name);
136 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
137 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
138 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
140 extern void __audit_file(const struct file *);
141 extern void __audit_inode_child(const struct inode *parent,
142 const struct dentry *dentry,
143 const unsigned char type);
144 extern void __audit_seccomp(unsigned long syscall, long signr, int code);
145 extern void __audit_ptrace(struct task_struct *t);
147 static inline bool audit_dummy_context(void)
149 void *p = current->audit_context;
150 return !p || *(int *)p;
152 static inline void audit_free(struct task_struct *task)
154 if (unlikely(task->audit_context))
157 static inline void audit_syscall_entry(int major, unsigned long a0,
158 unsigned long a1, unsigned long a2,
161 if (unlikely(current->audit_context))
162 __audit_syscall_entry(major, a0, a1, a2, a3);
164 static inline void audit_syscall_exit(void *pt_regs)
166 if (unlikely(current->audit_context)) {
167 int success = is_syscall_success(pt_regs);
168 long return_code = regs_return_value(pt_regs);
170 __audit_syscall_exit(success, return_code);
173 static inline struct filename *audit_reusename(const __user char *name)
175 if (unlikely(!audit_dummy_context()))
176 return __audit_reusename(name);
179 static inline void audit_getname(struct filename *name)
181 if (unlikely(!audit_dummy_context()))
182 __audit_getname(name);
184 static inline void audit_inode(struct filename *name,
185 const struct dentry *dentry,
186 unsigned int parent) {
187 if (unlikely(!audit_dummy_context())) {
188 unsigned int flags = 0;
190 flags |= AUDIT_INODE_PARENT;
191 __audit_inode(name, dentry, flags);
194 static inline void audit_file(struct file *file)
196 if (unlikely(!audit_dummy_context()))
199 static inline void audit_inode_parent_hidden(struct filename *name,
200 const struct dentry *dentry)
202 if (unlikely(!audit_dummy_context()))
203 __audit_inode(name, dentry,
204 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
206 static inline void audit_inode_child(const struct inode *parent,
207 const struct dentry *dentry,
208 const unsigned char type) {
209 if (unlikely(!audit_dummy_context()))
210 __audit_inode_child(parent, dentry, type);
212 void audit_core_dumps(long signr);
214 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
216 /* Force a record to be reported if a signal was delivered. */
217 if (signr || unlikely(!audit_dummy_context()))
218 __audit_seccomp(syscall, signr, code);
221 static inline void audit_ptrace(struct task_struct *t)
223 if (unlikely(!audit_dummy_context()))
227 /* Private API (for audit.c only) */
228 extern unsigned int audit_serial(void);
229 extern int auditsc_get_stamp(struct audit_context *ctx,
230 struct timespec *t, unsigned int *serial);
231 extern int audit_set_loginuid(kuid_t loginuid);
233 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
235 return tsk->loginuid;
238 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
240 return tsk->sessionid;
243 static inline struct tty_struct *audit_get_tty(struct task_struct *tsk)
245 struct tty_struct *tty = NULL;
248 spin_lock_irqsave(&tsk->sighand->siglock, flags);
250 tty = tty_kref_get(tsk->signal->tty);
251 spin_unlock_irqrestore(&tsk->sighand->siglock, flags);
255 static inline void audit_put_tty(struct tty_struct *tty)
260 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
261 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
262 extern void __audit_bprm(struct linux_binprm *bprm);
263 extern int __audit_socketcall(int nargs, unsigned long *args);
264 extern int __audit_sockaddr(int len, void *addr);
265 extern void __audit_fd_pair(int fd1, int fd2);
266 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
267 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
268 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
269 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
270 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
271 const struct cred *new,
272 const struct cred *old);
273 extern void __audit_log_capset(const struct cred *new, const struct cred *old);
274 extern void __audit_mmap_fd(int fd, int flags);
276 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
278 if (unlikely(!audit_dummy_context()))
279 __audit_ipc_obj(ipcp);
281 static inline void audit_fd_pair(int fd1, int fd2)
283 if (unlikely(!audit_dummy_context()))
284 __audit_fd_pair(fd1, fd2);
286 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
288 if (unlikely(!audit_dummy_context()))
289 __audit_ipc_set_perm(qbytes, uid, gid, mode);
291 static inline void audit_bprm(struct linux_binprm *bprm)
293 if (unlikely(!audit_dummy_context()))
296 static inline int audit_socketcall(int nargs, unsigned long *args)
298 if (unlikely(!audit_dummy_context()))
299 return __audit_socketcall(nargs, args);
303 static inline int audit_socketcall_compat(int nargs, u32 *args)
305 unsigned long a[AUDITSC_ARGS];
308 if (audit_dummy_context())
311 for (i = 0; i < nargs; i++)
312 a[i] = (unsigned long)args[i];
313 return __audit_socketcall(nargs, a);
316 static inline int audit_sockaddr(int len, void *addr)
318 if (unlikely(!audit_dummy_context()))
319 return __audit_sockaddr(len, addr);
322 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
324 if (unlikely(!audit_dummy_context()))
325 __audit_mq_open(oflag, mode, attr);
327 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
329 if (unlikely(!audit_dummy_context()))
330 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
332 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
334 if (unlikely(!audit_dummy_context()))
335 __audit_mq_notify(mqdes, notification);
337 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
339 if (unlikely(!audit_dummy_context()))
340 __audit_mq_getsetattr(mqdes, mqstat);
343 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
344 const struct cred *new,
345 const struct cred *old)
347 if (unlikely(!audit_dummy_context()))
348 return __audit_log_bprm_fcaps(bprm, new, old);
352 static inline void audit_log_capset(const struct cred *new,
353 const struct cred *old)
355 if (unlikely(!audit_dummy_context()))
356 __audit_log_capset(new, old);
359 static inline void audit_mmap_fd(int fd, int flags)
361 if (unlikely(!audit_dummy_context()))
362 __audit_mmap_fd(fd, flags);
365 extern int audit_n_rules;
366 extern int audit_signals;
367 #else /* CONFIG_AUDITSYSCALL */
368 static inline int audit_alloc(struct task_struct *task)
372 static inline void audit_free(struct task_struct *task)
374 static inline void audit_syscall_entry(int major, unsigned long a0,
375 unsigned long a1, unsigned long a2,
378 static inline void audit_syscall_exit(void *pt_regs)
380 static inline bool audit_dummy_context(void)
384 static inline struct filename *audit_reusename(const __user char *name)
388 static inline void audit_getname(struct filename *name)
390 static inline void __audit_inode(struct filename *name,
391 const struct dentry *dentry,
394 static inline void __audit_inode_child(const struct inode *parent,
395 const struct dentry *dentry,
396 const unsigned char type)
398 static inline void audit_inode(struct filename *name,
399 const struct dentry *dentry,
402 static inline void audit_file(struct file *file)
405 static inline void audit_inode_parent_hidden(struct filename *name,
406 const struct dentry *dentry)
408 static inline void audit_inode_child(const struct inode *parent,
409 const struct dentry *dentry,
410 const unsigned char type)
412 static inline void audit_core_dumps(long signr)
414 static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
416 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
418 static inline int auditsc_get_stamp(struct audit_context *ctx,
419 struct timespec *t, unsigned int *serial)
423 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
427 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
431 static inline struct tty_struct *audit_get_tty(struct task_struct *tsk)
435 static inline void audit_put_tty(struct tty_struct *tty)
437 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
439 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
440 gid_t gid, umode_t mode)
442 static inline void audit_bprm(struct linux_binprm *bprm)
444 static inline int audit_socketcall(int nargs, unsigned long *args)
449 static inline int audit_socketcall_compat(int nargs, u32 *args)
454 static inline void audit_fd_pair(int fd1, int fd2)
456 static inline int audit_sockaddr(int len, void *addr)
460 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
462 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
463 unsigned int msg_prio,
464 const struct timespec *abs_timeout)
466 static inline void audit_mq_notify(mqd_t mqdes,
467 const struct sigevent *notification)
469 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
471 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
472 const struct cred *new,
473 const struct cred *old)
477 static inline void audit_log_capset(const struct cred *new,
478 const struct cred *old)
480 static inline void audit_mmap_fd(int fd, int flags)
482 static inline void audit_ptrace(struct task_struct *t)
484 #define audit_n_rules 0
485 #define audit_signals 0
486 #endif /* CONFIG_AUDITSYSCALL */
488 static inline bool audit_loginuid_set(struct task_struct *tsk)
490 return uid_valid(audit_get_loginuid(tsk));
494 /* These are defined in audit.c */
496 extern __printf(4, 5)
497 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
498 const char *fmt, ...);
500 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
501 extern __printf(2, 3)
502 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
503 extern void audit_log_end(struct audit_buffer *ab);
504 extern bool audit_string_contains_control(const char *string,
506 extern void audit_log_n_hex(struct audit_buffer *ab,
507 const unsigned char *buf,
509 extern void audit_log_n_string(struct audit_buffer *ab,
512 extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
515 extern void audit_log_untrustedstring(struct audit_buffer *ab,
517 extern void audit_log_d_path(struct audit_buffer *ab,
519 const struct path *path);
520 extern void audit_log_key(struct audit_buffer *ab,
522 extern void audit_log_link_denied(const char *operation,
524 extern void audit_log_lost(const char *message);
525 #ifdef CONFIG_SECURITY
526 extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
528 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
532 extern int audit_log_task_context(struct audit_buffer *ab);
533 extern void audit_log_task_info(struct audit_buffer *ab,
534 struct task_struct *tsk);
536 extern int audit_update_lsm_rules(void);
538 /* Private API (for audit.c only) */
539 extern int audit_filter_user(int type);
540 extern int audit_filter_type(int type);
541 extern int audit_rule_change(int type, __u32 portid, int seq,
542 void *data, size_t datasz);
543 extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
545 extern u32 audit_enabled;
546 #else /* CONFIG_AUDIT */
547 static inline __printf(4, 5)
548 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
549 const char *fmt, ...)
551 static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
552 gfp_t gfp_mask, int type)
556 static inline __printf(2, 3)
557 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
559 static inline void audit_log_end(struct audit_buffer *ab)
561 static inline void audit_log_n_hex(struct audit_buffer *ab,
562 const unsigned char *buf, size_t len)
564 static inline void audit_log_n_string(struct audit_buffer *ab,
565 const char *buf, size_t n)
567 static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
568 const char *string, size_t n)
570 static inline void audit_log_untrustedstring(struct audit_buffer *ab,
573 static inline void audit_log_d_path(struct audit_buffer *ab,
575 const struct path *path)
577 static inline void audit_log_key(struct audit_buffer *ab, char *key)
579 static inline void audit_log_link_denied(const char *string,
580 const struct path *link)
582 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
584 static inline int audit_log_task_context(struct audit_buffer *ab)
588 static inline void audit_log_task_info(struct audit_buffer *ab,
589 struct task_struct *tsk)
591 static inline int audit_update_lsm_rules(void)
595 #define audit_enabled 0
596 #endif /* CONFIG_AUDIT */
597 static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
599 audit_log_n_string(ab, buf, strlen(buf));