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 */
67 /* Flag to indicate legacy AUDIT_LOGINUID unset usage */
68 #define AUDIT_LOGINUID_LEGACY 0x1
84 extern int is_audit_feature_set(int which);
86 extern int __init audit_register_class(int class, unsigned *list);
87 extern int audit_classify_syscall(int abi, unsigned syscall);
88 extern int audit_classify_arch(int arch);
89 /* only for compat system calls */
90 extern unsigned compat_write_class[];
91 extern unsigned compat_read_class[];
92 extern unsigned compat_dir_class[];
93 extern unsigned compat_chattr_class[];
94 extern unsigned compat_signal_class[];
96 extern int audit_classify_compat_syscall(int abi, unsigned syscall);
98 /* audit_names->type values */
99 #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
100 #define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
101 #define AUDIT_TYPE_PARENT 2 /* a parent audit record */
102 #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
103 #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
105 /* maximized args number that audit_socketcall can process */
106 #define AUDITSC_ARGS 6
110 extern void audit_log_session_info(struct audit_buffer *ab);
112 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
113 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
115 #define audit_is_compat(arch) false
118 #ifdef CONFIG_AUDITSYSCALL
119 #include <asm/syscall.h> /* for syscall_get_arch() */
121 /* These are defined in auditsc.c */
123 extern int audit_alloc(struct task_struct *task);
124 extern void __audit_free(struct task_struct *task);
125 extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
126 unsigned long a2, unsigned long a3);
127 extern void __audit_syscall_exit(int ret_success, long ret_value);
128 extern struct filename *__audit_reusename(const __user char *uptr);
129 extern void __audit_getname(struct filename *name);
130 extern void audit_putname(struct filename *name);
132 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
133 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
134 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
136 extern void __audit_file(const struct file *);
137 extern void __audit_inode_child(const struct inode *parent,
138 const struct dentry *dentry,
139 const unsigned char type);
140 extern void __audit_seccomp(unsigned long syscall, long signr, int code);
141 extern void __audit_ptrace(struct task_struct *t);
143 static inline int audit_dummy_context(void)
145 void *p = current->audit_context;
146 return !p || *(int *)p;
148 static inline void audit_free(struct task_struct *task)
150 if (unlikely(task->audit_context))
153 static inline void audit_syscall_entry(int major, unsigned long a0,
154 unsigned long a1, unsigned long a2,
157 if (unlikely(current->audit_context))
158 __audit_syscall_entry(major, a0, a1, a2, a3);
160 static inline void audit_syscall_exit(void *pt_regs)
162 if (unlikely(current->audit_context)) {
163 int success = is_syscall_success(pt_regs);
164 long return_code = regs_return_value(pt_regs);
166 __audit_syscall_exit(success, return_code);
169 static inline struct filename *audit_reusename(const __user char *name)
171 if (unlikely(!audit_dummy_context()))
172 return __audit_reusename(name);
175 static inline void audit_getname(struct filename *name)
177 if (unlikely(!audit_dummy_context()))
178 __audit_getname(name);
180 static inline void audit_inode(struct filename *name,
181 const struct dentry *dentry,
182 unsigned int parent) {
183 if (unlikely(!audit_dummy_context())) {
184 unsigned int flags = 0;
186 flags |= AUDIT_INODE_PARENT;
187 __audit_inode(name, dentry, flags);
190 static inline void audit_file(struct file *file)
192 if (unlikely(!audit_dummy_context()))
195 static inline void audit_inode_parent_hidden(struct filename *name,
196 const struct dentry *dentry)
198 if (unlikely(!audit_dummy_context()))
199 __audit_inode(name, dentry,
200 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
202 static inline void audit_inode_child(const struct inode *parent,
203 const struct dentry *dentry,
204 const unsigned char type) {
205 if (unlikely(!audit_dummy_context()))
206 __audit_inode_child(parent, dentry, type);
208 void audit_core_dumps(long signr);
210 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
212 /* Force a record to be reported if a signal was delivered. */
213 if (signr || unlikely(!audit_dummy_context()))
214 __audit_seccomp(syscall, signr, code);
217 static inline void audit_ptrace(struct task_struct *t)
219 if (unlikely(!audit_dummy_context()))
223 /* Private API (for audit.c only) */
224 extern unsigned int audit_serial(void);
225 extern int auditsc_get_stamp(struct audit_context *ctx,
226 struct timespec *t, unsigned int *serial);
227 extern int audit_set_loginuid(kuid_t loginuid);
229 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
231 return tsk->loginuid;
234 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
236 return tsk->sessionid;
239 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
240 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
241 extern void __audit_bprm(struct linux_binprm *bprm);
242 extern int __audit_socketcall(int nargs, unsigned long *args);
243 extern int __audit_sockaddr(int len, void *addr);
244 extern void __audit_fd_pair(int fd1, int fd2);
245 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
246 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
247 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
248 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
249 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
250 const struct cred *new,
251 const struct cred *old);
252 extern void __audit_log_capset(const struct cred *new, const struct cred *old);
253 extern void __audit_mmap_fd(int fd, int flags);
255 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
257 if (unlikely(!audit_dummy_context()))
258 __audit_ipc_obj(ipcp);
260 static inline void audit_fd_pair(int fd1, int fd2)
262 if (unlikely(!audit_dummy_context()))
263 __audit_fd_pair(fd1, fd2);
265 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
267 if (unlikely(!audit_dummy_context()))
268 __audit_ipc_set_perm(qbytes, uid, gid, mode);
270 static inline void audit_bprm(struct linux_binprm *bprm)
272 if (unlikely(!audit_dummy_context()))
275 static inline int audit_socketcall(int nargs, unsigned long *args)
277 if (unlikely(!audit_dummy_context()))
278 return __audit_socketcall(nargs, args);
281 static inline int audit_sockaddr(int len, void *addr)
283 if (unlikely(!audit_dummy_context()))
284 return __audit_sockaddr(len, addr);
287 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
289 if (unlikely(!audit_dummy_context()))
290 __audit_mq_open(oflag, mode, attr);
292 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
294 if (unlikely(!audit_dummy_context()))
295 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
297 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
299 if (unlikely(!audit_dummy_context()))
300 __audit_mq_notify(mqdes, notification);
302 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
304 if (unlikely(!audit_dummy_context()))
305 __audit_mq_getsetattr(mqdes, mqstat);
308 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
309 const struct cred *new,
310 const struct cred *old)
312 if (unlikely(!audit_dummy_context()))
313 return __audit_log_bprm_fcaps(bprm, new, old);
317 static inline void audit_log_capset(const struct cred *new,
318 const struct cred *old)
320 if (unlikely(!audit_dummy_context()))
321 __audit_log_capset(new, old);
324 static inline void audit_mmap_fd(int fd, int flags)
326 if (unlikely(!audit_dummy_context()))
327 __audit_mmap_fd(fd, flags);
330 extern int audit_n_rules;
331 extern int audit_signals;
332 #else /* CONFIG_AUDITSYSCALL */
333 static inline int audit_alloc(struct task_struct *task)
337 static inline void audit_free(struct task_struct *task)
339 static inline void audit_syscall_entry(int major, unsigned long a0,
340 unsigned long a1, unsigned long a2,
343 static inline void audit_syscall_exit(void *pt_regs)
345 static inline int audit_dummy_context(void)
349 static inline struct filename *audit_reusename(const __user char *name)
353 static inline void audit_getname(struct filename *name)
355 static inline void audit_putname(struct filename *name)
357 static inline void __audit_inode(struct filename *name,
358 const struct dentry *dentry,
361 static inline void __audit_inode_child(const struct inode *parent,
362 const struct dentry *dentry,
363 const unsigned char type)
365 static inline void audit_inode(struct filename *name,
366 const struct dentry *dentry,
369 static inline void audit_file(struct file *file)
372 static inline void audit_inode_parent_hidden(struct filename *name,
373 const struct dentry *dentry)
375 static inline void audit_inode_child(const struct inode *parent,
376 const struct dentry *dentry,
377 const unsigned char type)
379 static inline void audit_core_dumps(long signr)
381 static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
383 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
385 static inline int auditsc_get_stamp(struct audit_context *ctx,
386 struct timespec *t, unsigned int *serial)
390 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
394 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
398 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
400 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
401 gid_t gid, umode_t mode)
403 static inline void audit_bprm(struct linux_binprm *bprm)
405 static inline int audit_socketcall(int nargs, unsigned long *args)
409 static inline void audit_fd_pair(int fd1, int fd2)
411 static inline int audit_sockaddr(int len, void *addr)
415 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
417 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
418 unsigned int msg_prio,
419 const struct timespec *abs_timeout)
421 static inline void audit_mq_notify(mqd_t mqdes,
422 const struct sigevent *notification)
424 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
426 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
427 const struct cred *new,
428 const struct cred *old)
432 static inline void audit_log_capset(const struct cred *new,
433 const struct cred *old)
435 static inline void audit_mmap_fd(int fd, int flags)
437 static inline void audit_ptrace(struct task_struct *t)
439 #define audit_n_rules 0
440 #define audit_signals 0
441 #endif /* CONFIG_AUDITSYSCALL */
443 static inline bool audit_loginuid_set(struct task_struct *tsk)
445 return uid_valid(audit_get_loginuid(tsk));
449 /* These are defined in audit.c */
451 extern __printf(4, 5)
452 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
453 const char *fmt, ...);
455 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
456 extern __printf(2, 3)
457 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
458 extern void audit_log_end(struct audit_buffer *ab);
459 extern int audit_string_contains_control(const char *string,
461 extern void audit_log_n_hex(struct audit_buffer *ab,
462 const unsigned char *buf,
464 extern void audit_log_n_string(struct audit_buffer *ab,
467 extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
470 extern void audit_log_untrustedstring(struct audit_buffer *ab,
472 extern void audit_log_d_path(struct audit_buffer *ab,
474 const struct path *path);
475 extern void audit_log_key(struct audit_buffer *ab,
477 extern void audit_log_link_denied(const char *operation,
479 extern void audit_log_lost(const char *message);
480 #ifdef CONFIG_SECURITY
481 extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
483 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
487 extern int audit_log_task_context(struct audit_buffer *ab);
488 extern void audit_log_task_info(struct audit_buffer *ab,
489 struct task_struct *tsk);
491 extern int audit_update_lsm_rules(void);
493 /* Private API (for audit.c only) */
494 extern int audit_filter_user(int type);
495 extern int audit_filter_type(int type);
496 extern int audit_rule_change(int type, __u32 portid, int seq,
497 void *data, size_t datasz);
498 extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
500 extern u32 audit_enabled;
501 #else /* CONFIG_AUDIT */
502 static inline __printf(4, 5)
503 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
504 const char *fmt, ...)
506 static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
507 gfp_t gfp_mask, int type)
511 static inline __printf(2, 3)
512 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
514 static inline void audit_log_end(struct audit_buffer *ab)
516 static inline void audit_log_n_hex(struct audit_buffer *ab,
517 const unsigned char *buf, size_t len)
519 static inline void audit_log_n_string(struct audit_buffer *ab,
520 const char *buf, size_t n)
522 static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
523 const char *string, size_t n)
525 static inline void audit_log_untrustedstring(struct audit_buffer *ab,
528 static inline void audit_log_d_path(struct audit_buffer *ab,
530 const struct path *path)
532 static inline void audit_log_key(struct audit_buffer *ab, char *key)
534 static inline void audit_log_link_denied(const char *string,
535 const struct path *link)
537 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
539 static inline int audit_log_task_context(struct audit_buffer *ab)
543 static inline void audit_log_task_info(struct audit_buffer *ab,
544 struct task_struct *tsk)
546 #define audit_enabled 0
547 #endif /* CONFIG_AUDIT */
548 static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
550 audit_log_n_string(ab, buf, strlen(buf));