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 struct audit_sig_info {
39 struct netlink_skb_parms;
53 u32 mask[AUDIT_BITMASK_SIZE];
54 u32 buflen; /* for data alloc on list rules */
56 char *filterkey; /* ties events to rules */
57 struct audit_field *fields;
58 struct audit_field *arch_f; /* quick access to arch field */
59 struct audit_field *inode_f; /* quick access to an inode field */
60 struct audit_watch *watch; /* associated watch */
61 struct audit_tree *tree; /* associated watched tree */
62 struct list_head rlist; /* entry in audit_{watch,tree}.rules list */
63 struct list_head list; /* for AUDIT_LIST* purposes only */
77 extern int is_audit_feature_set(int which);
79 extern int __init audit_register_class(int class, unsigned *list);
80 extern int audit_classify_syscall(int abi, unsigned syscall);
81 extern int audit_classify_arch(int arch);
82 /* only for compat system calls */
83 extern unsigned compat_write_class[];
84 extern unsigned compat_read_class[];
85 extern unsigned compat_dir_class[];
86 extern unsigned compat_chattr_class[];
87 extern unsigned compat_signal_class[];
89 extern int __weak audit_classify_compat_syscall(int abi, unsigned syscall);
91 /* audit_names->type values */
92 #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
93 #define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
94 #define AUDIT_TYPE_PARENT 2 /* a parent audit record */
95 #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
96 #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
98 /* maximized args number that audit_socketcall can process */
99 #define AUDITSC_ARGS 6
103 extern void audit_log_session_info(struct audit_buffer *ab);
105 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
106 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
108 #define audit_is_compat(arch) false
111 #ifdef CONFIG_AUDITSYSCALL
112 #include <asm/syscall.h> /* for syscall_get_arch() */
114 /* These are defined in auditsc.c */
116 extern int audit_alloc(struct task_struct *task);
117 extern void __audit_free(struct task_struct *task);
118 extern void __audit_syscall_entry(int arch,
119 int major, unsigned long a0, unsigned long a1,
120 unsigned long a2, unsigned long a3);
121 extern void __audit_syscall_exit(int ret_success, long ret_value);
122 extern struct filename *__audit_reusename(const __user char *uptr);
123 extern void __audit_getname(struct filename *name);
124 extern void audit_putname(struct filename *name);
126 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
127 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
128 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
130 extern void __audit_inode_child(const struct inode *parent,
131 const struct dentry *dentry,
132 const unsigned char type);
133 extern void __audit_seccomp(unsigned long syscall, long signr, int code);
134 extern void __audit_ptrace(struct task_struct *t);
136 static inline int audit_dummy_context(void)
138 void *p = current->audit_context;
139 return !p || *(int *)p;
141 static inline void audit_free(struct task_struct *task)
143 if (unlikely(task->audit_context))
146 static inline void audit_syscall_entry(int major, unsigned long a0,
147 unsigned long a1, unsigned long a2,
150 if (unlikely(current->audit_context))
151 __audit_syscall_entry(syscall_get_arch(), major, a0, a1, a2, a3);
153 static inline void audit_syscall_exit(void *pt_regs)
155 if (unlikely(current->audit_context)) {
156 int success = is_syscall_success(pt_regs);
157 long return_code = regs_return_value(pt_regs);
159 __audit_syscall_exit(success, return_code);
162 static inline struct filename *audit_reusename(const __user char *name)
164 if (unlikely(!audit_dummy_context()))
165 return __audit_reusename(name);
168 static inline void audit_getname(struct filename *name)
170 if (unlikely(!audit_dummy_context()))
171 __audit_getname(name);
173 static inline void audit_inode(struct filename *name,
174 const struct dentry *dentry,
175 unsigned int parent) {
176 if (unlikely(!audit_dummy_context())) {
177 unsigned int flags = 0;
179 flags |= AUDIT_INODE_PARENT;
180 __audit_inode(name, dentry, flags);
183 static inline void audit_inode_parent_hidden(struct filename *name,
184 const struct dentry *dentry)
186 if (unlikely(!audit_dummy_context()))
187 __audit_inode(name, dentry,
188 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
190 static inline void audit_inode_child(const struct inode *parent,
191 const struct dentry *dentry,
192 const unsigned char type) {
193 if (unlikely(!audit_dummy_context()))
194 __audit_inode_child(parent, dentry, type);
196 void audit_core_dumps(long signr);
198 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
200 /* Force a record to be reported if a signal was delivered. */
201 if (signr || unlikely(!audit_dummy_context()))
202 __audit_seccomp(syscall, signr, code);
205 static inline void audit_ptrace(struct task_struct *t)
207 if (unlikely(!audit_dummy_context()))
211 /* Private API (for audit.c only) */
212 extern unsigned int audit_serial(void);
213 extern int auditsc_get_stamp(struct audit_context *ctx,
214 struct timespec *t, unsigned int *serial);
215 extern int audit_set_loginuid(kuid_t loginuid);
217 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
219 return tsk->loginuid;
222 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
224 return tsk->sessionid;
227 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
228 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
229 extern void __audit_bprm(struct linux_binprm *bprm);
230 extern int __audit_socketcall(int nargs, unsigned long *args);
231 extern int __audit_sockaddr(int len, void *addr);
232 extern void __audit_fd_pair(int fd1, int fd2);
233 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
234 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
235 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
236 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
237 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
238 const struct cred *new,
239 const struct cred *old);
240 extern void __audit_log_capset(const struct cred *new, const struct cred *old);
241 extern void __audit_mmap_fd(int fd, int flags);
243 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
245 if (unlikely(!audit_dummy_context()))
246 __audit_ipc_obj(ipcp);
248 static inline void audit_fd_pair(int fd1, int fd2)
250 if (unlikely(!audit_dummy_context()))
251 __audit_fd_pair(fd1, fd2);
253 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
255 if (unlikely(!audit_dummy_context()))
256 __audit_ipc_set_perm(qbytes, uid, gid, mode);
258 static inline void audit_bprm(struct linux_binprm *bprm)
260 if (unlikely(!audit_dummy_context()))
263 static inline int audit_socketcall(int nargs, unsigned long *args)
265 if (unlikely(!audit_dummy_context()))
266 return __audit_socketcall(nargs, args);
269 static inline int audit_sockaddr(int len, void *addr)
271 if (unlikely(!audit_dummy_context()))
272 return __audit_sockaddr(len, addr);
275 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
277 if (unlikely(!audit_dummy_context()))
278 __audit_mq_open(oflag, mode, attr);
280 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
282 if (unlikely(!audit_dummy_context()))
283 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
285 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
287 if (unlikely(!audit_dummy_context()))
288 __audit_mq_notify(mqdes, notification);
290 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
292 if (unlikely(!audit_dummy_context()))
293 __audit_mq_getsetattr(mqdes, mqstat);
296 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
297 const struct cred *new,
298 const struct cred *old)
300 if (unlikely(!audit_dummy_context()))
301 return __audit_log_bprm_fcaps(bprm, new, old);
305 static inline void audit_log_capset(const struct cred *new,
306 const struct cred *old)
308 if (unlikely(!audit_dummy_context()))
309 __audit_log_capset(new, old);
312 static inline void audit_mmap_fd(int fd, int flags)
314 if (unlikely(!audit_dummy_context()))
315 __audit_mmap_fd(fd, flags);
318 extern int audit_n_rules;
319 extern int audit_signals;
320 #else /* CONFIG_AUDITSYSCALL */
321 static inline int audit_alloc(struct task_struct *task)
325 static inline void audit_free(struct task_struct *task)
327 static inline void audit_syscall_entry(int major, unsigned long a0,
328 unsigned long a1, unsigned long a2,
331 static inline void audit_syscall_exit(void *pt_regs)
333 static inline int audit_dummy_context(void)
337 static inline struct filename *audit_reusename(const __user char *name)
341 static inline void audit_getname(struct filename *name)
343 static inline void audit_putname(struct filename *name)
345 static inline void __audit_inode(struct filename *name,
346 const struct dentry *dentry,
349 static inline void __audit_inode_child(const struct inode *parent,
350 const struct dentry *dentry,
351 const unsigned char type)
353 static inline void audit_inode(struct filename *name,
354 const struct dentry *dentry,
357 static inline void audit_inode_parent_hidden(struct filename *name,
358 const struct dentry *dentry)
360 static inline void audit_inode_child(const struct inode *parent,
361 const struct dentry *dentry,
362 const unsigned char type)
364 static inline void audit_core_dumps(long signr)
366 static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
368 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
370 static inline int auditsc_get_stamp(struct audit_context *ctx,
371 struct timespec *t, unsigned int *serial)
375 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
379 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
383 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
385 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
386 gid_t gid, umode_t mode)
388 static inline void audit_bprm(struct linux_binprm *bprm)
390 static inline int audit_socketcall(int nargs, unsigned long *args)
394 static inline void audit_fd_pair(int fd1, int fd2)
396 static inline int audit_sockaddr(int len, void *addr)
400 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
402 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
403 unsigned int msg_prio,
404 const struct timespec *abs_timeout)
406 static inline void audit_mq_notify(mqd_t mqdes,
407 const struct sigevent *notification)
409 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
411 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
412 const struct cred *new,
413 const struct cred *old)
417 static inline void audit_log_capset(const struct cred *new,
418 const struct cred *old)
420 static inline void audit_mmap_fd(int fd, int flags)
422 static inline void audit_ptrace(struct task_struct *t)
424 #define audit_n_rules 0
425 #define audit_signals 0
426 #endif /* CONFIG_AUDITSYSCALL */
428 static inline bool audit_loginuid_set(struct task_struct *tsk)
430 return uid_valid(audit_get_loginuid(tsk));
434 /* These are defined in audit.c */
436 extern __printf(4, 5)
437 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
438 const char *fmt, ...);
440 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
441 extern __printf(2, 3)
442 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
443 extern void audit_log_end(struct audit_buffer *ab);
444 extern int audit_string_contains_control(const char *string,
446 extern void audit_log_n_hex(struct audit_buffer *ab,
447 const unsigned char *buf,
449 extern void audit_log_n_string(struct audit_buffer *ab,
452 extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
455 extern void audit_log_untrustedstring(struct audit_buffer *ab,
457 extern void audit_log_d_path(struct audit_buffer *ab,
459 const struct path *path);
460 extern void audit_log_key(struct audit_buffer *ab,
462 extern void audit_log_link_denied(const char *operation,
464 extern void audit_log_lost(const char *message);
465 #ifdef CONFIG_SECURITY
466 extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
468 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
472 extern int audit_log_task_context(struct audit_buffer *ab);
473 extern void audit_log_task_info(struct audit_buffer *ab,
474 struct task_struct *tsk);
476 extern int audit_update_lsm_rules(void);
478 /* Private API (for audit.c only) */
479 extern int audit_filter_user(int type);
480 extern int audit_filter_type(int type);
481 extern int audit_rule_change(int type, __u32 portid, int seq,
482 void *data, size_t datasz);
483 extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
485 extern u32 audit_enabled;
486 #else /* CONFIG_AUDIT */
487 static inline __printf(4, 5)
488 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
489 const char *fmt, ...)
491 static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
492 gfp_t gfp_mask, int type)
496 static inline __printf(2, 3)
497 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
499 static inline void audit_log_end(struct audit_buffer *ab)
501 static inline void audit_log_n_hex(struct audit_buffer *ab,
502 const unsigned char *buf, size_t len)
504 static inline void audit_log_n_string(struct audit_buffer *ab,
505 const char *buf, size_t n)
507 static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
508 const char *string, size_t n)
510 static inline void audit_log_untrustedstring(struct audit_buffer *ab,
513 static inline void audit_log_d_path(struct audit_buffer *ab,
515 const struct path *path)
517 static inline void audit_log_key(struct audit_buffer *ab, char *key)
519 static inline void audit_log_link_denied(const char *string,
520 const struct path *link)
522 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
524 static inline int audit_log_task_context(struct audit_buffer *ab)
528 static inline void audit_log_task_info(struct audit_buffer *ab,
529 struct task_struct *tsk)
531 #define audit_enabled 0
532 #endif /* CONFIG_AUDIT */
533 static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
535 audit_log_n_string(ab, buf, strlen(buf));