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>
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)
118 extern void audit_log_session_info(struct audit_buffer *ab);
121 /* These are defined in audit.c */
123 extern __printf(4, 5)
124 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
125 const char *fmt, ...);
127 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
128 extern __printf(2, 3)
129 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
130 extern void audit_log_end(struct audit_buffer *ab);
131 extern bool audit_string_contains_control(const char *string,
133 extern void audit_log_n_hex(struct audit_buffer *ab,
134 const unsigned char *buf,
136 extern void audit_log_n_string(struct audit_buffer *ab,
139 extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
142 extern void audit_log_untrustedstring(struct audit_buffer *ab,
144 extern void audit_log_d_path(struct audit_buffer *ab,
146 const struct path *path);
147 extern void audit_log_key(struct audit_buffer *ab,
149 extern void audit_log_link_denied(const char *operation,
150 const struct path *link);
151 extern void audit_log_lost(const char *message);
152 #ifdef CONFIG_SECURITY
153 extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
155 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
159 extern int audit_log_task_context(struct audit_buffer *ab);
160 extern void audit_log_task_info(struct audit_buffer *ab,
161 struct task_struct *tsk);
163 extern int audit_update_lsm_rules(void);
165 /* Private API (for audit.c only) */
166 extern int audit_rule_change(int type, int seq, void *data, size_t datasz);
167 extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
169 extern u32 audit_enabled;
170 #else /* CONFIG_AUDIT */
171 static inline __printf(4, 5)
172 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
173 const char *fmt, ...)
175 static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
176 gfp_t gfp_mask, int type)
180 static inline __printf(2, 3)
181 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
183 static inline void audit_log_end(struct audit_buffer *ab)
185 static inline void audit_log_n_hex(struct audit_buffer *ab,
186 const unsigned char *buf, size_t len)
188 static inline void audit_log_n_string(struct audit_buffer *ab,
189 const char *buf, size_t n)
191 static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
192 const char *string, size_t n)
194 static inline void audit_log_untrustedstring(struct audit_buffer *ab,
197 static inline void audit_log_d_path(struct audit_buffer *ab,
199 const struct path *path)
201 static inline void audit_log_key(struct audit_buffer *ab, char *key)
203 static inline void audit_log_link_denied(const char *string,
204 const struct path *link)
206 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
208 static inline int audit_log_task_context(struct audit_buffer *ab)
212 static inline void audit_log_task_info(struct audit_buffer *ab,
213 struct task_struct *tsk)
215 #define audit_enabled 0
216 #endif /* CONFIG_AUDIT */
218 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
219 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
221 #define audit_is_compat(arch) false
224 #ifdef CONFIG_AUDITSYSCALL
225 #include <asm/syscall.h> /* for syscall_get_arch() */
227 /* These are defined in auditsc.c */
229 extern int audit_alloc(struct task_struct *task);
230 extern void __audit_free(struct task_struct *task);
231 extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
232 unsigned long a2, unsigned long a3);
233 extern void __audit_syscall_exit(int ret_success, long ret_value);
234 extern struct filename *__audit_reusename(const __user char *uptr);
235 extern void __audit_getname(struct filename *name);
237 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
238 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
239 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
241 extern void __audit_file(const struct file *);
242 extern void __audit_inode_child(struct inode *parent,
243 const struct dentry *dentry,
244 const unsigned char type);
245 extern void __audit_seccomp(unsigned long syscall, long signr, int code);
246 extern void __audit_ptrace(struct task_struct *t);
248 static inline bool audit_dummy_context(void)
250 void *p = current->audit_context;
251 return !p || *(int *)p;
253 static inline void audit_free(struct task_struct *task)
255 if (unlikely(task->audit_context))
258 static inline void audit_syscall_entry(int major, unsigned long a0,
259 unsigned long a1, unsigned long a2,
262 if (unlikely(current->audit_context))
263 __audit_syscall_entry(major, a0, a1, a2, a3);
265 static inline void audit_syscall_exit(void *pt_regs)
267 if (unlikely(current->audit_context)) {
268 int success = is_syscall_success(pt_regs);
269 long return_code = regs_return_value(pt_regs);
271 __audit_syscall_exit(success, return_code);
274 static inline struct filename *audit_reusename(const __user char *name)
276 if (unlikely(!audit_dummy_context()))
277 return __audit_reusename(name);
280 static inline void audit_getname(struct filename *name)
282 if (unlikely(!audit_dummy_context()))
283 __audit_getname(name);
285 static inline void audit_inode(struct filename *name,
286 const struct dentry *dentry,
287 unsigned int parent) {
288 if (unlikely(!audit_dummy_context())) {
289 unsigned int flags = 0;
291 flags |= AUDIT_INODE_PARENT;
292 __audit_inode(name, dentry, flags);
295 static inline void audit_file(struct file *file)
297 if (unlikely(!audit_dummy_context()))
300 static inline void audit_inode_parent_hidden(struct filename *name,
301 const struct dentry *dentry)
303 if (unlikely(!audit_dummy_context()))
304 __audit_inode(name, dentry,
305 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
307 static inline void audit_inode_child(struct inode *parent,
308 const struct dentry *dentry,
309 const unsigned char type) {
310 if (unlikely(!audit_dummy_context()))
311 __audit_inode_child(parent, dentry, type);
313 void audit_core_dumps(long signr);
315 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
320 /* Force a record to be reported if a signal was delivered. */
321 if (signr || unlikely(!audit_dummy_context()))
322 __audit_seccomp(syscall, signr, code);
325 static inline void audit_ptrace(struct task_struct *t)
327 if (unlikely(!audit_dummy_context()))
331 /* Private API (for audit.c only) */
332 extern unsigned int audit_serial(void);
333 extern int auditsc_get_stamp(struct audit_context *ctx,
334 struct timespec64 *t, unsigned int *serial);
335 extern int audit_set_loginuid(kuid_t loginuid);
337 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
339 return tsk->loginuid;
342 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
344 return tsk->sessionid;
347 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
348 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
349 extern void __audit_bprm(struct linux_binprm *bprm);
350 extern int __audit_socketcall(int nargs, unsigned long *args);
351 extern int __audit_sockaddr(int len, void *addr);
352 extern void __audit_fd_pair(int fd1, int fd2);
353 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
354 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
355 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
356 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
357 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
358 const struct cred *new,
359 const struct cred *old);
360 extern void __audit_log_capset(const struct cred *new, const struct cred *old);
361 extern void __audit_mmap_fd(int fd, int flags);
362 extern void __audit_log_kern_module(char *name);
364 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
366 if (unlikely(!audit_dummy_context()))
367 __audit_ipc_obj(ipcp);
369 static inline void audit_fd_pair(int fd1, int fd2)
371 if (unlikely(!audit_dummy_context()))
372 __audit_fd_pair(fd1, fd2);
374 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
376 if (unlikely(!audit_dummy_context()))
377 __audit_ipc_set_perm(qbytes, uid, gid, mode);
379 static inline void audit_bprm(struct linux_binprm *bprm)
381 if (unlikely(!audit_dummy_context()))
384 static inline int audit_socketcall(int nargs, unsigned long *args)
386 if (unlikely(!audit_dummy_context()))
387 return __audit_socketcall(nargs, args);
391 static inline int audit_socketcall_compat(int nargs, u32 *args)
393 unsigned long a[AUDITSC_ARGS];
396 if (audit_dummy_context())
399 for (i = 0; i < nargs; i++)
400 a[i] = (unsigned long)args[i];
401 return __audit_socketcall(nargs, a);
404 static inline int audit_sockaddr(int len, void *addr)
406 if (unlikely(!audit_dummy_context()))
407 return __audit_sockaddr(len, addr);
410 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
412 if (unlikely(!audit_dummy_context()))
413 __audit_mq_open(oflag, mode, attr);
415 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
417 if (unlikely(!audit_dummy_context()))
418 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
420 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
422 if (unlikely(!audit_dummy_context()))
423 __audit_mq_notify(mqdes, notification);
425 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
427 if (unlikely(!audit_dummy_context()))
428 __audit_mq_getsetattr(mqdes, mqstat);
431 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
432 const struct cred *new,
433 const struct cred *old)
435 if (unlikely(!audit_dummy_context()))
436 return __audit_log_bprm_fcaps(bprm, new, old);
440 static inline void audit_log_capset(const struct cred *new,
441 const struct cred *old)
443 if (unlikely(!audit_dummy_context()))
444 __audit_log_capset(new, old);
447 static inline void audit_mmap_fd(int fd, int flags)
449 if (unlikely(!audit_dummy_context()))
450 __audit_mmap_fd(fd, flags);
453 static inline void audit_log_kern_module(char *name)
455 if (!audit_dummy_context())
456 __audit_log_kern_module(name);
459 extern int audit_n_rules;
460 extern int audit_signals;
461 #else /* CONFIG_AUDITSYSCALL */
462 static inline int audit_alloc(struct task_struct *task)
466 static inline void audit_free(struct task_struct *task)
468 static inline void audit_syscall_entry(int major, unsigned long a0,
469 unsigned long a1, unsigned long a2,
472 static inline void audit_syscall_exit(void *pt_regs)
474 static inline bool audit_dummy_context(void)
478 static inline struct filename *audit_reusename(const __user char *name)
482 static inline void audit_getname(struct filename *name)
484 static inline void __audit_inode(struct filename *name,
485 const struct dentry *dentry,
488 static inline void __audit_inode_child(struct inode *parent,
489 const struct dentry *dentry,
490 const unsigned char type)
492 static inline void audit_inode(struct filename *name,
493 const struct dentry *dentry,
496 static inline void audit_file(struct file *file)
499 static inline void audit_inode_parent_hidden(struct filename *name,
500 const struct dentry *dentry)
502 static inline void audit_inode_child(struct inode *parent,
503 const struct dentry *dentry,
504 const unsigned char type)
506 static inline void audit_core_dumps(long signr)
508 static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
510 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
512 static inline int auditsc_get_stamp(struct audit_context *ctx,
513 struct timespec64 *t, unsigned int *serial)
517 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
521 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
525 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
527 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
528 gid_t gid, umode_t mode)
530 static inline void audit_bprm(struct linux_binprm *bprm)
532 static inline int audit_socketcall(int nargs, unsigned long *args)
537 static inline int audit_socketcall_compat(int nargs, u32 *args)
542 static inline void audit_fd_pair(int fd1, int fd2)
544 static inline int audit_sockaddr(int len, void *addr)
548 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
550 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
551 unsigned int msg_prio,
552 const struct timespec *abs_timeout)
554 static inline void audit_mq_notify(mqd_t mqdes,
555 const struct sigevent *notification)
557 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
559 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
560 const struct cred *new,
561 const struct cred *old)
565 static inline void audit_log_capset(const struct cred *new,
566 const struct cred *old)
568 static inline void audit_mmap_fd(int fd, int flags)
571 static inline void audit_log_kern_module(char *name)
575 static inline void audit_ptrace(struct task_struct *t)
577 #define audit_n_rules 0
578 #define audit_signals 0
579 #endif /* CONFIG_AUDITSYSCALL */
581 static inline bool audit_loginuid_set(struct task_struct *tsk)
583 return uid_valid(audit_get_loginuid(tsk));
586 static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
588 audit_log_n_string(ab, buf, strlen(buf));