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 */
81 extern int is_audit_feature_set(int which);
83 extern int __init audit_register_class(int class, unsigned *list);
84 extern int audit_classify_syscall(int abi, unsigned syscall);
85 extern int audit_classify_arch(int arch);
86 /* only for compat system calls */
87 extern unsigned compat_write_class[];
88 extern unsigned compat_read_class[];
89 extern unsigned compat_dir_class[];
90 extern unsigned compat_chattr_class[];
91 extern unsigned compat_signal_class[];
93 extern int audit_classify_compat_syscall(int abi, unsigned syscall);
95 /* audit_names->type values */
96 #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
97 #define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
98 #define AUDIT_TYPE_PARENT 2 /* a parent audit record */
99 #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
100 #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
102 /* maximized args number that audit_socketcall can process */
103 #define AUDITSC_ARGS 6
107 extern void audit_log_session_info(struct audit_buffer *ab);
109 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
110 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
112 #define audit_is_compat(arch) false
115 #ifdef CONFIG_AUDITSYSCALL
116 #include <asm/syscall.h> /* for syscall_get_arch() */
118 /* These are defined in auditsc.c */
120 extern int audit_alloc(struct task_struct *task);
121 extern void __audit_free(struct task_struct *task);
122 extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
123 unsigned long a2, unsigned long a3);
124 extern void __audit_syscall_exit(int ret_success, long ret_value);
125 extern struct filename *__audit_reusename(const __user char *uptr);
126 extern void __audit_getname(struct filename *name);
127 extern void audit_putname(struct filename *name);
129 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
130 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
131 extern void __audit_inode(struct filename *name, const struct dentry *dentry,
133 extern void __audit_file(const struct file *);
134 extern void __audit_inode_child(const struct inode *parent,
135 const struct dentry *dentry,
136 const unsigned char type);
137 extern void __audit_seccomp(unsigned long syscall, long signr, int code);
138 extern void __audit_ptrace(struct task_struct *t);
140 static inline int audit_dummy_context(void)
142 void *p = current->audit_context;
143 return !p || *(int *)p;
145 static inline void audit_free(struct task_struct *task)
147 if (unlikely(task->audit_context))
150 static inline void audit_syscall_entry(int major, unsigned long a0,
151 unsigned long a1, unsigned long a2,
154 if (unlikely(current->audit_context))
155 __audit_syscall_entry(major, a0, a1, a2, a3);
157 static inline void audit_syscall_exit(void *pt_regs)
159 if (unlikely(current->audit_context)) {
160 int success = is_syscall_success(pt_regs);
161 long return_code = regs_return_value(pt_regs);
163 __audit_syscall_exit(success, return_code);
166 static inline struct filename *audit_reusename(const __user char *name)
168 if (unlikely(!audit_dummy_context()))
169 return __audit_reusename(name);
172 static inline void audit_getname(struct filename *name)
174 if (unlikely(!audit_dummy_context()))
175 __audit_getname(name);
177 static inline void audit_inode(struct filename *name,
178 const struct dentry *dentry,
179 unsigned int parent) {
180 if (unlikely(!audit_dummy_context())) {
181 unsigned int flags = 0;
183 flags |= AUDIT_INODE_PARENT;
184 __audit_inode(name, dentry, flags);
187 static inline void audit_file(struct file *file)
189 if (unlikely(!audit_dummy_context()))
192 static inline void audit_inode_parent_hidden(struct filename *name,
193 const struct dentry *dentry)
195 if (unlikely(!audit_dummy_context()))
196 __audit_inode(name, dentry,
197 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
199 static inline void audit_inode_child(const struct inode *parent,
200 const struct dentry *dentry,
201 const unsigned char type) {
202 if (unlikely(!audit_dummy_context()))
203 __audit_inode_child(parent, dentry, type);
205 void audit_core_dumps(long signr);
207 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
209 /* Force a record to be reported if a signal was delivered. */
210 if (signr || unlikely(!audit_dummy_context()))
211 __audit_seccomp(syscall, signr, code);
214 static inline void audit_ptrace(struct task_struct *t)
216 if (unlikely(!audit_dummy_context()))
220 /* Private API (for audit.c only) */
221 extern unsigned int audit_serial(void);
222 extern int auditsc_get_stamp(struct audit_context *ctx,
223 struct timespec *t, unsigned int *serial);
224 extern int audit_set_loginuid(kuid_t loginuid);
226 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
228 return tsk->loginuid;
231 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
233 return tsk->sessionid;
236 extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
237 extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
238 extern void __audit_bprm(struct linux_binprm *bprm);
239 extern int __audit_socketcall(int nargs, unsigned long *args);
240 extern int __audit_sockaddr(int len, void *addr);
241 extern void __audit_fd_pair(int fd1, int fd2);
242 extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
243 extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
244 extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
245 extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
246 extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
247 const struct cred *new,
248 const struct cred *old);
249 extern void __audit_log_capset(const struct cred *new, const struct cred *old);
250 extern void __audit_mmap_fd(int fd, int flags);
252 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
254 if (unlikely(!audit_dummy_context()))
255 __audit_ipc_obj(ipcp);
257 static inline void audit_fd_pair(int fd1, int fd2)
259 if (unlikely(!audit_dummy_context()))
260 __audit_fd_pair(fd1, fd2);
262 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
264 if (unlikely(!audit_dummy_context()))
265 __audit_ipc_set_perm(qbytes, uid, gid, mode);
267 static inline void audit_bprm(struct linux_binprm *bprm)
269 if (unlikely(!audit_dummy_context()))
272 static inline int audit_socketcall(int nargs, unsigned long *args)
274 if (unlikely(!audit_dummy_context()))
275 return __audit_socketcall(nargs, args);
278 static inline int audit_sockaddr(int len, void *addr)
280 if (unlikely(!audit_dummy_context()))
281 return __audit_sockaddr(len, addr);
284 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
286 if (unlikely(!audit_dummy_context()))
287 __audit_mq_open(oflag, mode, attr);
289 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
291 if (unlikely(!audit_dummy_context()))
292 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
294 static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
296 if (unlikely(!audit_dummy_context()))
297 __audit_mq_notify(mqdes, notification);
299 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
301 if (unlikely(!audit_dummy_context()))
302 __audit_mq_getsetattr(mqdes, mqstat);
305 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
306 const struct cred *new,
307 const struct cred *old)
309 if (unlikely(!audit_dummy_context()))
310 return __audit_log_bprm_fcaps(bprm, new, old);
314 static inline void audit_log_capset(const struct cred *new,
315 const struct cred *old)
317 if (unlikely(!audit_dummy_context()))
318 __audit_log_capset(new, old);
321 static inline void audit_mmap_fd(int fd, int flags)
323 if (unlikely(!audit_dummy_context()))
324 __audit_mmap_fd(fd, flags);
327 extern int audit_n_rules;
328 extern int audit_signals;
329 #else /* CONFIG_AUDITSYSCALL */
330 static inline int audit_alloc(struct task_struct *task)
334 static inline void audit_free(struct task_struct *task)
336 static inline void audit_syscall_entry(int major, unsigned long a0,
337 unsigned long a1, unsigned long a2,
340 static inline void audit_syscall_exit(void *pt_regs)
342 static inline int audit_dummy_context(void)
346 static inline struct filename *audit_reusename(const __user char *name)
350 static inline void audit_getname(struct filename *name)
352 static inline void audit_putname(struct filename *name)
354 static inline void __audit_inode(struct filename *name,
355 const struct dentry *dentry,
358 static inline void __audit_inode_child(const struct inode *parent,
359 const struct dentry *dentry,
360 const unsigned char type)
362 static inline void audit_inode(struct filename *name,
363 const struct dentry *dentry,
366 static inline void audit_file(struct file *file)
369 static inline void audit_inode_parent_hidden(struct filename *name,
370 const struct dentry *dentry)
372 static inline void audit_inode_child(const struct inode *parent,
373 const struct dentry *dentry,
374 const unsigned char type)
376 static inline void audit_core_dumps(long signr)
378 static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
380 static inline void audit_seccomp(unsigned long syscall, long signr, int code)
382 static inline int auditsc_get_stamp(struct audit_context *ctx,
383 struct timespec *t, unsigned int *serial)
387 static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
391 static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
395 static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
397 static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
398 gid_t gid, umode_t mode)
400 static inline void audit_bprm(struct linux_binprm *bprm)
402 static inline int audit_socketcall(int nargs, unsigned long *args)
406 static inline void audit_fd_pair(int fd1, int fd2)
408 static inline int audit_sockaddr(int len, void *addr)
412 static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
414 static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
415 unsigned int msg_prio,
416 const struct timespec *abs_timeout)
418 static inline void audit_mq_notify(mqd_t mqdes,
419 const struct sigevent *notification)
421 static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
423 static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
424 const struct cred *new,
425 const struct cred *old)
429 static inline void audit_log_capset(const struct cred *new,
430 const struct cred *old)
432 static inline void audit_mmap_fd(int fd, int flags)
434 static inline void audit_ptrace(struct task_struct *t)
436 #define audit_n_rules 0
437 #define audit_signals 0
438 #endif /* CONFIG_AUDITSYSCALL */
440 static inline bool audit_loginuid_set(struct task_struct *tsk)
442 return uid_valid(audit_get_loginuid(tsk));
446 /* These are defined in audit.c */
448 extern __printf(4, 5)
449 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
450 const char *fmt, ...);
452 extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
453 extern __printf(2, 3)
454 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
455 extern void audit_log_end(struct audit_buffer *ab);
456 extern int audit_string_contains_control(const char *string,
458 extern void audit_log_n_hex(struct audit_buffer *ab,
459 const unsigned char *buf,
461 extern void audit_log_n_string(struct audit_buffer *ab,
464 extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
467 extern void audit_log_untrustedstring(struct audit_buffer *ab,
469 extern void audit_log_d_path(struct audit_buffer *ab,
471 const struct path *path);
472 extern void audit_log_key(struct audit_buffer *ab,
474 extern void audit_log_link_denied(const char *operation,
476 extern void audit_log_lost(const char *message);
477 #ifdef CONFIG_SECURITY
478 extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
480 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
484 extern int audit_log_task_context(struct audit_buffer *ab);
485 extern void audit_log_task_info(struct audit_buffer *ab,
486 struct task_struct *tsk);
488 extern int audit_update_lsm_rules(void);
490 /* Private API (for audit.c only) */
491 extern int audit_filter_user(int type);
492 extern int audit_filter_type(int type);
493 extern int audit_rule_change(int type, __u32 portid, int seq,
494 void *data, size_t datasz);
495 extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
497 extern u32 audit_enabled;
498 #else /* CONFIG_AUDIT */
499 static inline __printf(4, 5)
500 void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
501 const char *fmt, ...)
503 static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
504 gfp_t gfp_mask, int type)
508 static inline __printf(2, 3)
509 void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
511 static inline void audit_log_end(struct audit_buffer *ab)
513 static inline void audit_log_n_hex(struct audit_buffer *ab,
514 const unsigned char *buf, size_t len)
516 static inline void audit_log_n_string(struct audit_buffer *ab,
517 const char *buf, size_t n)
519 static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
520 const char *string, size_t n)
522 static inline void audit_log_untrustedstring(struct audit_buffer *ab,
525 static inline void audit_log_d_path(struct audit_buffer *ab,
527 const struct path *path)
529 static inline void audit_log_key(struct audit_buffer *ab, char *key)
531 static inline void audit_log_link_denied(const char *string,
532 const struct path *link)
534 static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
536 static inline int audit_log_task_context(struct audit_buffer *ab)
540 static inline void audit_log_task_info(struct audit_buffer *ab,
541 struct task_struct *tsk)
543 #define audit_enabled 0
544 #endif /* CONFIG_AUDIT */
545 static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
547 audit_log_n_string(ab, buf, strlen(buf));