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
114 extern void audit_log_session_info(struct audit_buffer *ab);
116 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
117 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
119 #define audit_is_compat(arch) false
122 #ifdef CONFIG_AUDITSYSCALL
123 #include <asm/syscall.h> /* for syscall_get_arch() */
125 /* These are defined in auditsc.c */
127 extern int audit_alloc(struct task_struct *task);
128 extern void __audit_free(struct task_struct *task);
129 extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
130 unsigned long a2, unsigned long a3);
131 extern void __audit_syscall_exit(int ret_success, long ret_value);
132 extern struct filename *__audit_reusename(const __user char *uptr);
133 extern void __audit_getname(struct filename *name);
135 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
136 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
137 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
139 extern void __audit_file(const struct file *);
140 extern void __audit_inode_child(const struct inode *parent,
141 const struct dentry *dentry,
142 const unsigned char type);
143 extern void __audit_seccomp(unsigned long syscall, long signr, int code);
144 extern void __audit_ptrace(struct task_struct *t);
146 static inline bool audit_dummy_context(void)
148 void *p = current->audit_context;
149 return !p || *(int *)p;
151 static inline void audit_free(struct task_struct *task)
153 if (unlikely(task->audit_context))
156 static inline void audit_syscall_entry(int major, unsigned long a0,
157 unsigned long a1, unsigned long a2,
160 if (unlikely(current->audit_context))
161 __audit_syscall_entry(major, a0, a1, a2, a3);
163 static inline void audit_syscall_exit(void *pt_regs)
165 if (unlikely(current->audit_context)) {
166 int success = is_syscall_success(pt_regs);
167 long return_code = regs_return_value(pt_regs);
169 __audit_syscall_exit(success, return_code);
172 static inline struct filename *audit_reusename(const __user char *name)
174 if (unlikely(!audit_dummy_context()))
175 return __audit_reusename(name);
178 static inline void audit_getname(struct filename *name)
180 if (unlikely(!audit_dummy_context()))
181 __audit_getname(name);
183 static inline void audit_inode(struct filename *name,
184 const struct dentry *dentry,
185 unsigned int parent) {
186 if (unlikely(!audit_dummy_context())) {
187 unsigned int flags = 0;
189 flags |= AUDIT_INODE_PARENT;
190 __audit_inode(name, dentry, flags);
193 static inline void audit_file(struct file *file)
195 if (unlikely(!audit_dummy_context()))
198 static inline void audit_inode_parent_hidden(struct filename *name,
199 const struct dentry *dentry)
201 if (unlikely(!audit_dummy_context()))
202 __audit_inode(name, dentry,
203 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
205 static inline void audit_inode_child(const struct inode *parent,
206 const struct dentry *dentry,
207 const unsigned char type) {
208 if (unlikely(!audit_dummy_context()))
209 __audit_inode_child(parent, dentry, type);
211 void audit_core_dumps(long signr);
213 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
215 /* Force a record to be reported if a signal was delivered. */
216 if (signr || unlikely(!audit_dummy_context()))
217 __audit_seccomp(syscall, signr, code);
220 static inline void audit_ptrace(struct task_struct *t)
222 if (unlikely(!audit_dummy_context()))
226 /* Private API (for audit.c only) */
227 extern unsigned int audit_serial(void);
228 extern int auditsc_get_stamp(struct audit_context *ctx,
229 struct timespec *t, unsigned int *serial);
230 extern int audit_set_loginuid(kuid_t loginuid);
232 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
234 return tsk->loginuid;
237 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
239 return tsk->sessionid;
242 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
243 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
244 extern void __audit_bprm(struct linux_binprm *bprm);
245 extern int __audit_socketcall(int nargs, unsigned long *args);
246 extern int __audit_sockaddr(int len, void *addr);
247 extern void __audit_fd_pair(int fd1, int fd2);
248 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
249 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
250 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
251 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
252 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
253 const struct cred *new,
254 const struct cred *old);
255 extern void __audit_log_capset(const struct cred *new, const struct cred *old);
256 extern void __audit_mmap_fd(int fd, int flags);
258 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
260 if (unlikely(!audit_dummy_context()))
261 __audit_ipc_obj(ipcp);
263 static inline void audit_fd_pair(int fd1, int fd2)
265 if (unlikely(!audit_dummy_context()))
266 __audit_fd_pair(fd1, fd2);
268 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
270 if (unlikely(!audit_dummy_context()))
271 __audit_ipc_set_perm(qbytes, uid, gid, mode);
273 static inline void audit_bprm(struct linux_binprm *bprm)
275 if (unlikely(!audit_dummy_context()))
278 static inline int audit_socketcall(int nargs, unsigned long *args)
280 if (unlikely(!audit_dummy_context()))
281 return __audit_socketcall(nargs, args);
284 static inline int audit_sockaddr(int len, void *addr)
286 if (unlikely(!audit_dummy_context()))
287 return __audit_sockaddr(len, addr);
290 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
292 if (unlikely(!audit_dummy_context()))
293 __audit_mq_open(oflag, mode, attr);
295 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
297 if (unlikely(!audit_dummy_context()))
298 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
300 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
302 if (unlikely(!audit_dummy_context()))
303 __audit_mq_notify(mqdes, notification);
305 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
307 if (unlikely(!audit_dummy_context()))
308 __audit_mq_getsetattr(mqdes, mqstat);
311 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
312 const struct cred *new,
313 const struct cred *old)
315 if (unlikely(!audit_dummy_context()))
316 return __audit_log_bprm_fcaps(bprm, new, old);
320 static inline void audit_log_capset(const struct cred *new,
321 const struct cred *old)
323 if (unlikely(!audit_dummy_context()))
324 __audit_log_capset(new, old);
327 static inline void audit_mmap_fd(int fd, int flags)
329 if (unlikely(!audit_dummy_context()))
330 __audit_mmap_fd(fd, flags);
333 extern int audit_n_rules;
334 extern int audit_signals;
335 #else /* CONFIG_AUDITSYSCALL */
336 static inline int audit_alloc(struct task_struct *task)
340 static inline void audit_free(struct task_struct *task)
342 static inline void audit_syscall_entry(int major, unsigned long a0,
343 unsigned long a1, unsigned long a2,
346 static inline void audit_syscall_exit(void *pt_regs)
348 static inline bool audit_dummy_context(void)
352 static inline struct filename *audit_reusename(const __user char *name)
356 static inline void audit_getname(struct filename *name)
358 static inline void __audit_inode(struct filename *name,
359 const struct dentry *dentry,
362 static inline void __audit_inode_child(const struct inode *parent,
363 const struct dentry *dentry,
364 const unsigned char type)
366 static inline void audit_inode(struct filename *name,
367 const struct dentry *dentry,
370 static inline void audit_file(struct file *file)
373 static inline void audit_inode_parent_hidden(struct filename *name,
374 const struct dentry *dentry)
376 static inline void audit_inode_child(const struct inode *parent,
377 const struct dentry *dentry,
378 const unsigned char type)
380 static inline void audit_core_dumps(long signr)
382 static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
384 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
386 static inline int auditsc_get_stamp(struct audit_context *ctx,
387 struct timespec *t, unsigned int *serial)
391 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
395 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
399 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
401 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
402 gid_t gid, umode_t mode)
404 static inline void audit_bprm(struct linux_binprm *bprm)
406 static inline int audit_socketcall(int nargs, unsigned long *args)
410 static inline void audit_fd_pair(int fd1, int fd2)
412 static inline int audit_sockaddr(int len, void *addr)
416 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
418 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
419 unsigned int msg_prio,
420 const struct timespec *abs_timeout)
422 static inline void audit_mq_notify(mqd_t mqdes,
423 const struct sigevent *notification)
425 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
427 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
428 const struct cred *new,
429 const struct cred *old)
433 static inline void audit_log_capset(const struct cred *new,
434 const struct cred *old)
436 static inline void audit_mmap_fd(int fd, int flags)
438 static inline void audit_ptrace(struct task_struct *t)
440 #define audit_n_rules 0
441 #define audit_signals 0
442 #endif /* CONFIG_AUDITSYSCALL */
444 static inline bool audit_loginuid_set(struct task_struct *tsk)
446 return uid_valid(audit_get_loginuid(tsk));
450 /* These are defined in audit.c */
452 extern __printf(4, 5)
453 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
454 const char *fmt, ...);
456 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
457 extern __printf(2, 3)
458 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
459 extern void audit_log_end(struct audit_buffer *ab);
460 extern bool audit_string_contains_control(const char *string,
462 extern void audit_log_n_hex(struct audit_buffer *ab,
463 const unsigned char *buf,
465 extern void audit_log_n_string(struct audit_buffer *ab,
468 extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
471 extern void audit_log_untrustedstring(struct audit_buffer *ab,
473 extern void audit_log_d_path(struct audit_buffer *ab,
475 const struct path *path);
476 extern void audit_log_key(struct audit_buffer *ab,
478 extern void audit_log_link_denied(const char *operation,
480 extern void audit_log_lost(const char *message);
481 #ifdef CONFIG_SECURITY
482 extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
484 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
488 extern int audit_log_task_context(struct audit_buffer *ab);
489 extern void audit_log_task_info(struct audit_buffer *ab,
490 struct task_struct *tsk);
492 extern int audit_update_lsm_rules(void);
494 /* Private API (for audit.c only) */
495 extern int audit_filter_user(int type);
496 extern int audit_filter_type(int type);
497 extern int audit_rule_change(int type, __u32 portid, int seq,
498 void *data, size_t datasz);
499 extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
501 extern u32 audit_enabled;
502 #else /* CONFIG_AUDIT */
503 static inline __printf(4, 5)
504 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
505 const char *fmt, ...)
507 static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
508 gfp_t gfp_mask, int type)
512 static inline __printf(2, 3)
513 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
515 static inline void audit_log_end(struct audit_buffer *ab)
517 static inline void audit_log_n_hex(struct audit_buffer *ab,
518 const unsigned char *buf, size_t len)
520 static inline void audit_log_n_string(struct audit_buffer *ab,
521 const char *buf, size_t n)
523 static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
524 const char *string, size_t n)
526 static inline void audit_log_untrustedstring(struct audit_buffer *ab,
529 static inline void audit_log_d_path(struct audit_buffer *ab,
531 const struct path *path)
533 static inline void audit_log_key(struct audit_buffer *ab, char *key)
535 static inline void audit_log_link_denied(const char *string,
536 const struct path *link)
538 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
540 static inline int audit_log_task_context(struct audit_buffer *ab)
544 static inline void audit_log_task_info(struct audit_buffer *ab,
545 struct task_struct *tsk)
547 #define audit_enabled 0
548 #endif /* CONFIG_AUDIT */
549 static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
551 audit_log_n_string(ab, buf, strlen(buf));