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 list_head rlist; /* entry in audit_{watch,tree}.rules list */
66 struct list_head list; /* for AUDIT_LIST* purposes only */
70 /* Flag to indicate legacy AUDIT_LOGINUID unset usage */
71 #define AUDIT_LOGINUID_LEGACY 0x1
87 extern int is_audit_feature_set(int which);
89 extern int __init audit_register_class(int class, unsigned *list);
90 extern int audit_classify_syscall(int abi, unsigned syscall);
91 extern int audit_classify_arch(int arch);
92 /* only for compat system calls */
93 extern unsigned compat_write_class[];
94 extern unsigned compat_read_class[];
95 extern unsigned compat_dir_class[];
96 extern unsigned compat_chattr_class[];
97 extern unsigned compat_signal_class[];
99 extern int audit_classify_compat_syscall(int abi, unsigned syscall);
101 /* audit_names->type values */
102 #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
103 #define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
104 #define AUDIT_TYPE_PARENT 2 /* a parent audit record */
105 #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
106 #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
108 /* maximized args number that audit_socketcall can process */
109 #define AUDITSC_ARGS 6
113 extern void audit_log_session_info(struct audit_buffer *ab);
115 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
116 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
118 #define audit_is_compat(arch) false
121 #ifdef CONFIG_AUDITSYSCALL
122 #include <asm/syscall.h> /* for syscall_get_arch() */
124 /* These are defined in auditsc.c */
126 extern int audit_alloc(struct task_struct *task);
127 extern void __audit_free(struct task_struct *task);
128 extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
129 unsigned long a2, unsigned long a3);
130 extern void __audit_syscall_exit(int ret_success, long ret_value);
131 extern struct filename *__audit_reusename(const __user char *uptr);
132 extern void __audit_getname(struct filename *name);
134 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
135 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
136 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
138 extern void __audit_file(const struct file *);
139 extern void __audit_inode_child(const struct inode *parent,
140 const struct dentry *dentry,
141 const unsigned char type);
142 extern void __audit_seccomp(unsigned long syscall, long signr, int code);
143 extern void __audit_ptrace(struct task_struct *t);
145 static inline int audit_dummy_context(void)
147 void *p = current->audit_context;
148 return !p || *(int *)p;
150 static inline void audit_free(struct task_struct *task)
152 if (unlikely(task->audit_context))
155 static inline void audit_syscall_entry(int major, unsigned long a0,
156 unsigned long a1, unsigned long a2,
159 if (unlikely(current->audit_context))
160 __audit_syscall_entry(major, a0, a1, a2, a3);
162 static inline void audit_syscall_exit(void *pt_regs)
164 if (unlikely(current->audit_context)) {
165 int success = is_syscall_success(pt_regs);
166 long return_code = regs_return_value(pt_regs);
168 __audit_syscall_exit(success, return_code);
171 static inline struct filename *audit_reusename(const __user char *name)
173 if (unlikely(!audit_dummy_context()))
174 return __audit_reusename(name);
177 static inline void audit_getname(struct filename *name)
179 if (unlikely(!audit_dummy_context()))
180 __audit_getname(name);
182 static inline void audit_inode(struct filename *name,
183 const struct dentry *dentry,
184 unsigned int parent) {
185 if (unlikely(!audit_dummy_context())) {
186 unsigned int flags = 0;
188 flags |= AUDIT_INODE_PARENT;
189 __audit_inode(name, dentry, flags);
192 static inline void audit_file(struct file *file)
194 if (unlikely(!audit_dummy_context()))
197 static inline void audit_inode_parent_hidden(struct filename *name,
198 const struct dentry *dentry)
200 if (unlikely(!audit_dummy_context()))
201 __audit_inode(name, dentry,
202 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
204 static inline void audit_inode_child(const struct inode *parent,
205 const struct dentry *dentry,
206 const unsigned char type) {
207 if (unlikely(!audit_dummy_context()))
208 __audit_inode_child(parent, dentry, type);
210 void audit_core_dumps(long signr);
212 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
214 /* Force a record to be reported if a signal was delivered. */
215 if (signr || unlikely(!audit_dummy_context()))
216 __audit_seccomp(syscall, signr, code);
219 static inline void audit_ptrace(struct task_struct *t)
221 if (unlikely(!audit_dummy_context()))
225 /* Private API (for audit.c only) */
226 extern unsigned int audit_serial(void);
227 extern int auditsc_get_stamp(struct audit_context *ctx,
228 struct timespec *t, unsigned int *serial);
229 extern int audit_set_loginuid(kuid_t loginuid);
231 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
233 return tsk->loginuid;
236 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
238 return tsk->sessionid;
241 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
242 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
243 extern void __audit_bprm(struct linux_binprm *bprm);
244 extern int __audit_socketcall(int nargs, unsigned long *args);
245 extern int __audit_sockaddr(int len, void *addr);
246 extern void __audit_fd_pair(int fd1, int fd2);
247 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
248 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
249 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
250 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
251 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
252 const struct cred *new,
253 const struct cred *old);
254 extern void __audit_log_capset(const struct cred *new, const struct cred *old);
255 extern void __audit_mmap_fd(int fd, int flags);
257 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
259 if (unlikely(!audit_dummy_context()))
260 __audit_ipc_obj(ipcp);
262 static inline void audit_fd_pair(int fd1, int fd2)
264 if (unlikely(!audit_dummy_context()))
265 __audit_fd_pair(fd1, fd2);
267 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
269 if (unlikely(!audit_dummy_context()))
270 __audit_ipc_set_perm(qbytes, uid, gid, mode);
272 static inline void audit_bprm(struct linux_binprm *bprm)
274 if (unlikely(!audit_dummy_context()))
277 static inline int audit_socketcall(int nargs, unsigned long *args)
279 if (unlikely(!audit_dummy_context()))
280 return __audit_socketcall(nargs, args);
283 static inline int audit_sockaddr(int len, void *addr)
285 if (unlikely(!audit_dummy_context()))
286 return __audit_sockaddr(len, addr);
289 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
291 if (unlikely(!audit_dummy_context()))
292 __audit_mq_open(oflag, mode, attr);
294 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
296 if (unlikely(!audit_dummy_context()))
297 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
299 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
301 if (unlikely(!audit_dummy_context()))
302 __audit_mq_notify(mqdes, notification);
304 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
306 if (unlikely(!audit_dummy_context()))
307 __audit_mq_getsetattr(mqdes, mqstat);
310 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
311 const struct cred *new,
312 const struct cred *old)
314 if (unlikely(!audit_dummy_context()))
315 return __audit_log_bprm_fcaps(bprm, new, old);
319 static inline void audit_log_capset(const struct cred *new,
320 const struct cred *old)
322 if (unlikely(!audit_dummy_context()))
323 __audit_log_capset(new, old);
326 static inline void audit_mmap_fd(int fd, int flags)
328 if (unlikely(!audit_dummy_context()))
329 __audit_mmap_fd(fd, flags);
332 extern int audit_n_rules;
333 extern int audit_signals;
334 #else /* CONFIG_AUDITSYSCALL */
335 static inline int audit_alloc(struct task_struct *task)
339 static inline void audit_free(struct task_struct *task)
341 static inline void audit_syscall_entry(int major, unsigned long a0,
342 unsigned long a1, unsigned long a2,
345 static inline void audit_syscall_exit(void *pt_regs)
347 static inline int audit_dummy_context(void)
351 static inline struct filename *audit_reusename(const __user char *name)
355 static inline void audit_getname(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));