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;
54 u32 mask[AUDIT_BITMASK_SIZE];
55 u32 buflen; /* for data alloc on list rules */
57 char *filterkey; /* ties events to rules */
58 struct audit_field *fields;
59 struct audit_field *arch_f; /* quick access to arch field */
60 struct audit_field *inode_f; /* quick access to an inode field */
61 struct audit_watch *watch; /* associated watch */
62 struct audit_tree *tree; /* associated watched tree */
63 struct list_head rlist; /* entry in audit_{watch,tree}.rules list */
64 struct list_head list; /* for AUDIT_LIST* purposes only */
68 /* Flag to indicate legacy AUDIT_LOGINUID unset usage */
69 #define AUDIT_LOGINUID_LEGACY 0x1
85 extern int is_audit_feature_set(int which);
87 extern int __init audit_register_class(int class, unsigned *list);
88 extern int audit_classify_syscall(int abi, unsigned syscall);
89 extern int audit_classify_arch(int arch);
90 /* only for compat system calls */
91 extern unsigned compat_write_class[];
92 extern unsigned compat_read_class[];
93 extern unsigned compat_dir_class[];
94 extern unsigned compat_chattr_class[];
95 extern unsigned compat_signal_class[];
97 extern int __weak audit_classify_compat_syscall(int abi, unsigned syscall);
99 /* audit_names->type values */
100 #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
101 #define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
102 #define AUDIT_TYPE_PARENT 2 /* a parent audit record */
103 #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
104 #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
106 /* maximized args number that audit_socketcall can process */
107 #define AUDITSC_ARGS 6
111 extern void audit_log_session_info(struct audit_buffer *ab);
113 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
114 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
116 #define audit_is_compat(arch) false
119 #ifdef CONFIG_AUDITSYSCALL
120 #include <asm/syscall.h> /* for syscall_get_arch() */
122 /* These are defined in auditsc.c */
124 extern int audit_alloc(struct task_struct *task);
125 extern void __audit_free(struct task_struct *task);
126 extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
127 unsigned long a2, unsigned long a3);
128 extern void __audit_syscall_exit(int ret_success, long ret_value);
129 extern struct filename *__audit_reusename(const __user char *uptr);
130 extern void __audit_getname(struct filename *name);
131 extern void audit_putname(struct filename *name);
133 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
134 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
135 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
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_inode_parent_hidden(struct filename *name,
191 const struct dentry *dentry)
193 if (unlikely(!audit_dummy_context()))
194 __audit_inode(name, dentry,
195 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
197 static inline void audit_inode_child(const struct inode *parent,
198 const struct dentry *dentry,
199 const unsigned char type) {
200 if (unlikely(!audit_dummy_context()))
201 __audit_inode_child(parent, dentry, type);
203 void audit_core_dumps(long signr);
205 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
207 /* Force a record to be reported if a signal was delivered. */
208 if (signr || unlikely(!audit_dummy_context()))
209 __audit_seccomp(syscall, signr, code);
212 static inline void audit_ptrace(struct task_struct *t)
214 if (unlikely(!audit_dummy_context()))
218 /* Private API (for audit.c only) */
219 extern unsigned int audit_serial(void);
220 extern int auditsc_get_stamp(struct audit_context *ctx,
221 struct timespec *t, unsigned int *serial);
222 extern int audit_set_loginuid(kuid_t loginuid);
224 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
226 return tsk->loginuid;
229 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
231 return tsk->sessionid;
234 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
235 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
236 extern void __audit_bprm(struct linux_binprm *bprm);
237 extern int __audit_socketcall(int nargs, unsigned long *args);
238 extern int __audit_sockaddr(int len, void *addr);
239 extern void __audit_fd_pair(int fd1, int fd2);
240 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
241 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
242 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
243 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
244 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
245 const struct cred *new,
246 const struct cred *old);
247 extern void __audit_log_capset(const struct cred *new, const struct cred *old);
248 extern void __audit_mmap_fd(int fd, int flags);
250 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
252 if (unlikely(!audit_dummy_context()))
253 __audit_ipc_obj(ipcp);
255 static inline void audit_fd_pair(int fd1, int fd2)
257 if (unlikely(!audit_dummy_context()))
258 __audit_fd_pair(fd1, fd2);
260 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
262 if (unlikely(!audit_dummy_context()))
263 __audit_ipc_set_perm(qbytes, uid, gid, mode);
265 static inline void audit_bprm(struct linux_binprm *bprm)
267 if (unlikely(!audit_dummy_context()))
270 static inline int audit_socketcall(int nargs, unsigned long *args)
272 if (unlikely(!audit_dummy_context()))
273 return __audit_socketcall(nargs, args);
276 static inline int audit_sockaddr(int len, void *addr)
278 if (unlikely(!audit_dummy_context()))
279 return __audit_sockaddr(len, addr);
282 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
284 if (unlikely(!audit_dummy_context()))
285 __audit_mq_open(oflag, mode, attr);
287 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
289 if (unlikely(!audit_dummy_context()))
290 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
292 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
294 if (unlikely(!audit_dummy_context()))
295 __audit_mq_notify(mqdes, notification);
297 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
299 if (unlikely(!audit_dummy_context()))
300 __audit_mq_getsetattr(mqdes, mqstat);
303 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
304 const struct cred *new,
305 const struct cred *old)
307 if (unlikely(!audit_dummy_context()))
308 return __audit_log_bprm_fcaps(bprm, new, old);
312 static inline void audit_log_capset(const struct cred *new,
313 const struct cred *old)
315 if (unlikely(!audit_dummy_context()))
316 __audit_log_capset(new, old);
319 static inline void audit_mmap_fd(int fd, int flags)
321 if (unlikely(!audit_dummy_context()))
322 __audit_mmap_fd(fd, flags);
325 extern int audit_n_rules;
326 extern int audit_signals;
327 #else /* CONFIG_AUDITSYSCALL */
328 static inline int audit_alloc(struct task_struct *task)
332 static inline void audit_free(struct task_struct *task)
334 static inline void audit_syscall_entry(int major, unsigned long a0,
335 unsigned long a1, unsigned long a2,
338 static inline void audit_syscall_exit(void *pt_regs)
340 static inline int audit_dummy_context(void)
344 static inline struct filename *audit_reusename(const __user char *name)
348 static inline void audit_getname(struct filename *name)
350 static inline void audit_putname(struct filename *name)
352 static inline void __audit_inode(struct filename *name,
353 const struct dentry *dentry,
356 static inline void __audit_inode_child(const struct inode *parent,
357 const struct dentry *dentry,
358 const unsigned char type)
360 static inline void audit_inode(struct filename *name,
361 const struct dentry *dentry,
364 static inline void audit_inode_parent_hidden(struct filename *name,
365 const struct dentry *dentry)
367 static inline void audit_inode_child(const struct inode *parent,
368 const struct dentry *dentry,
369 const unsigned char type)
371 static inline void audit_core_dumps(long signr)
373 static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
375 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
377 static inline int auditsc_get_stamp(struct audit_context *ctx,
378 struct timespec *t, unsigned int *serial)
382 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
386 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
390 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
392 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
393 gid_t gid, umode_t mode)
395 static inline void audit_bprm(struct linux_binprm *bprm)
397 static inline int audit_socketcall(int nargs, unsigned long *args)
401 static inline void audit_fd_pair(int fd1, int fd2)
403 static inline int audit_sockaddr(int len, void *addr)
407 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
409 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
410 unsigned int msg_prio,
411 const struct timespec *abs_timeout)
413 static inline void audit_mq_notify(mqd_t mqdes,
414 const struct sigevent *notification)
416 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
418 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
419 const struct cred *new,
420 const struct cred *old)
424 static inline void audit_log_capset(const struct cred *new,
425 const struct cred *old)
427 static inline void audit_mmap_fd(int fd, int flags)
429 static inline void audit_ptrace(struct task_struct *t)
431 #define audit_n_rules 0
432 #define audit_signals 0
433 #endif /* CONFIG_AUDITSYSCALL */
435 static inline bool audit_loginuid_set(struct task_struct *tsk)
437 return uid_valid(audit_get_loginuid(tsk));
441 /* These are defined in audit.c */
443 extern __printf(4, 5)
444 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
445 const char *fmt, ...);
447 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
448 extern __printf(2, 3)
449 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
450 extern void audit_log_end(struct audit_buffer *ab);
451 extern int audit_string_contains_control(const char *string,
453 extern void audit_log_n_hex(struct audit_buffer *ab,
454 const unsigned char *buf,
456 extern void audit_log_n_string(struct audit_buffer *ab,
459 extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
462 extern void audit_log_untrustedstring(struct audit_buffer *ab,
464 extern void audit_log_d_path(struct audit_buffer *ab,
466 const struct path *path);
467 extern void audit_log_key(struct audit_buffer *ab,
469 extern void audit_log_link_denied(const char *operation,
471 extern void audit_log_lost(const char *message);
472 #ifdef CONFIG_SECURITY
473 extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
475 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
479 extern int audit_log_task_context(struct audit_buffer *ab);
480 extern void audit_log_task_info(struct audit_buffer *ab,
481 struct task_struct *tsk);
483 extern int audit_update_lsm_rules(void);
485 /* Private API (for audit.c only) */
486 extern int audit_filter_user(int type);
487 extern int audit_filter_type(int type);
488 extern int audit_rule_change(int type, __u32 portid, int seq,
489 void *data, size_t datasz);
490 extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
492 extern u32 audit_enabled;
493 #else /* CONFIG_AUDIT */
494 static inline __printf(4, 5)
495 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
496 const char *fmt, ...)
498 static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
499 gfp_t gfp_mask, int type)
503 static inline __printf(2, 3)
504 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
506 static inline void audit_log_end(struct audit_buffer *ab)
508 static inline void audit_log_n_hex(struct audit_buffer *ab,
509 const unsigned char *buf, size_t len)
511 static inline void audit_log_n_string(struct audit_buffer *ab,
512 const char *buf, size_t n)
514 static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
515 const char *string, size_t n)
517 static inline void audit_log_untrustedstring(struct audit_buffer *ab,
520 static inline void audit_log_d_path(struct audit_buffer *ab,
522 const struct path *path)
524 static inline void audit_log_key(struct audit_buffer *ab, char *key)
526 static inline void audit_log_link_denied(const char *string,
527 const struct path *link)
529 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
531 static inline int audit_log_task_context(struct audit_buffer *ab)
535 static inline void audit_log_task_info(struct audit_buffer *ab,
536 struct task_struct *tsk)
538 #define audit_enabled 0
539 #endif /* CONFIG_AUDIT */
540 static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
542 audit_log_n_string(ab, buf, strlen(buf));