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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 audit_fsnotify_mark
*exe
;
66 struct list_head rlist
; /* entry in audit_{watch,tree}.rules list */
67 struct list_head list
; /* for AUDIT_LIST* purposes only */
71 /* Flag to indicate legacy AUDIT_LOGINUID unset usage */
72 #define AUDIT_LOGINUID_LEGACY 0x1
88 extern int is_audit_feature_set(int which
);
90 extern int __init
audit_register_class(int class, unsigned *list
);
91 extern int audit_classify_syscall(int abi
, unsigned syscall
);
92 extern int audit_classify_arch(int arch
);
93 /* only for compat system calls */
94 extern unsigned compat_write_class
[];
95 extern unsigned compat_read_class
[];
96 extern unsigned compat_dir_class
[];
97 extern unsigned compat_chattr_class
[];
98 extern unsigned compat_signal_class
[];
100 extern int audit_classify_compat_syscall(int abi
, unsigned syscall
);
102 /* audit_names->type values */
103 #define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
104 #define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
105 #define AUDIT_TYPE_PARENT 2 /* a parent audit record */
106 #define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
107 #define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
109 /* maximized args number that audit_socketcall can process */
110 #define AUDITSC_ARGS 6
112 /* bit values for ->signal->audit_tty */
113 #define AUDIT_TTY_ENABLE BIT(0)
114 #define AUDIT_TTY_LOG_PASSWD BIT(1)
118 extern void audit_log_session_info(struct audit_buffer
*ab
);
121 /* These are defined in audit.c */
123 extern __printf(4, 5)
124 void audit_log(struct audit_context
*ctx
, gfp_t gfp_mask
, int type
,
125 const char *fmt
, ...);
127 extern struct audit_buffer
*audit_log_start(struct audit_context
*ctx
, gfp_t gfp_mask
, int type
);
128 extern __printf(2, 3)
129 void audit_log_format(struct audit_buffer
*ab
, const char *fmt
, ...);
130 extern void audit_log_end(struct audit_buffer
*ab
);
131 extern bool audit_string_contains_control(const char *string
,
133 extern void audit_log_n_hex(struct audit_buffer
*ab
,
134 const unsigned char *buf
,
136 extern void audit_log_n_string(struct audit_buffer
*ab
,
139 extern void audit_log_n_untrustedstring(struct audit_buffer
*ab
,
142 extern void audit_log_untrustedstring(struct audit_buffer
*ab
,
144 extern void audit_log_d_path(struct audit_buffer
*ab
,
146 const struct path
*path
);
147 extern void audit_log_key(struct audit_buffer
*ab
,
149 extern void audit_log_link_denied(const char *operation
,
150 const struct path
*link
);
151 extern void audit_log_lost(const char *message
);
152 #ifdef CONFIG_SECURITY
153 extern void audit_log_secctx(struct audit_buffer
*ab
, u32 secid
);
155 static inline void audit_log_secctx(struct audit_buffer
*ab
, u32 secid
)
159 extern int audit_log_task_context(struct audit_buffer
*ab
);
160 extern void audit_log_task_info(struct audit_buffer
*ab
,
161 struct task_struct
*tsk
);
163 extern int audit_update_lsm_rules(void);
165 /* Private API (for audit.c only) */
166 extern int audit_rule_change(int type
, int seq
, void *data
, size_t datasz
);
167 extern int audit_list_rules_send(struct sk_buff
*request_skb
, int seq
);
169 extern u32 audit_enabled
;
170 #else /* CONFIG_AUDIT */
171 static inline __printf(4, 5)
172 void audit_log(struct audit_context
*ctx
, gfp_t gfp_mask
, int type
,
173 const char *fmt
, ...)
175 static inline struct audit_buffer
*audit_log_start(struct audit_context
*ctx
,
176 gfp_t gfp_mask
, int type
)
180 static inline __printf(2, 3)
181 void audit_log_format(struct audit_buffer
*ab
, const char *fmt
, ...)
183 static inline void audit_log_end(struct audit_buffer
*ab
)
185 static inline void audit_log_n_hex(struct audit_buffer
*ab
,
186 const unsigned char *buf
, size_t len
)
188 static inline void audit_log_n_string(struct audit_buffer
*ab
,
189 const char *buf
, size_t n
)
191 static inline void audit_log_n_untrustedstring(struct audit_buffer
*ab
,
192 const char *string
, size_t n
)
194 static inline void audit_log_untrustedstring(struct audit_buffer
*ab
,
197 static inline void audit_log_d_path(struct audit_buffer
*ab
,
199 const struct path
*path
)
201 static inline void audit_log_key(struct audit_buffer
*ab
, char *key
)
203 static inline void audit_log_link_denied(const char *string
,
204 const struct path
*link
)
206 static inline void audit_log_secctx(struct audit_buffer
*ab
, u32 secid
)
208 static inline int audit_log_task_context(struct audit_buffer
*ab
)
212 static inline void audit_log_task_info(struct audit_buffer
*ab
,
213 struct task_struct
*tsk
)
215 #define audit_enabled 0
216 #endif /* CONFIG_AUDIT */
218 #ifdef CONFIG_AUDIT_COMPAT_GENERIC
219 #define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
221 #define audit_is_compat(arch) false
224 #ifdef CONFIG_AUDITSYSCALL
225 #include <asm/syscall.h> /* for syscall_get_arch() */
227 /* These are defined in auditsc.c */
229 extern int audit_alloc(struct task_struct
*task
);
230 extern void __audit_free(struct task_struct
*task
);
231 extern void __audit_syscall_entry(int major
, unsigned long a0
, unsigned long a1
,
232 unsigned long a2
, unsigned long a3
);
233 extern void __audit_syscall_exit(int ret_success
, long ret_value
);
234 extern struct filename
*__audit_reusename(const __user
char *uptr
);
235 extern void __audit_getname(struct filename
*name
);
237 #define AUDIT_INODE_PARENT 1 /* dentry represents the parent */
238 #define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
239 extern void __audit_inode(struct filename
*name
, const struct dentry
*dentry
,
241 extern void __audit_file(const struct file
*);
242 extern void __audit_inode_child(struct inode
*parent
,
243 const struct dentry
*dentry
,
244 const unsigned char type
);
245 extern void __audit_seccomp(unsigned long syscall
, long signr
, int code
);
246 extern void __audit_ptrace(struct task_struct
*t
);
248 static inline bool audit_dummy_context(void)
250 void *p
= current
->audit_context
;
251 return !p
|| *(int *)p
;
253 static inline void audit_free(struct task_struct
*task
)
255 if (unlikely(task
->audit_context
))
258 static inline void audit_syscall_entry(int major
, unsigned long a0
,
259 unsigned long a1
, unsigned long a2
,
262 if (unlikely(current
->audit_context
))
263 __audit_syscall_entry(major
, a0
, a1
, a2
, a3
);
265 static inline void audit_syscall_exit(void *pt_regs
)
267 if (unlikely(current
->audit_context
)) {
268 int success
= is_syscall_success(pt_regs
);
269 long return_code
= regs_return_value(pt_regs
);
271 __audit_syscall_exit(success
, return_code
);
274 static inline struct filename
*audit_reusename(const __user
char *name
)
276 if (unlikely(!audit_dummy_context()))
277 return __audit_reusename(name
);
280 static inline void audit_getname(struct filename
*name
)
282 if (unlikely(!audit_dummy_context()))
283 __audit_getname(name
);
285 static inline void audit_inode(struct filename
*name
,
286 const struct dentry
*dentry
,
287 unsigned int parent
) {
288 if (unlikely(!audit_dummy_context())) {
289 unsigned int flags
= 0;
291 flags
|= AUDIT_INODE_PARENT
;
292 __audit_inode(name
, dentry
, flags
);
295 static inline void audit_file(struct file
*file
)
297 if (unlikely(!audit_dummy_context()))
300 static inline void audit_inode_parent_hidden(struct filename
*name
,
301 const struct dentry
*dentry
)
303 if (unlikely(!audit_dummy_context()))
304 __audit_inode(name
, dentry
,
305 AUDIT_INODE_PARENT
| AUDIT_INODE_HIDDEN
);
307 static inline void audit_inode_child(struct inode
*parent
,
308 const struct dentry
*dentry
,
309 const unsigned char type
) {
310 if (unlikely(!audit_dummy_context()))
311 __audit_inode_child(parent
, dentry
, type
);
313 void audit_core_dumps(long signr
);
315 static inline void audit_seccomp(unsigned long syscall
, long signr
, int code
)
317 if (audit_enabled
&& unlikely(!audit_dummy_context()))
318 __audit_seccomp(syscall
, signr
, code
);
321 static inline void audit_ptrace(struct task_struct
*t
)
323 if (unlikely(!audit_dummy_context()))
327 /* Private API (for audit.c only) */
328 extern unsigned int audit_serial(void);
329 extern int auditsc_get_stamp(struct audit_context
*ctx
,
330 struct timespec64
*t
, unsigned int *serial
);
331 extern int audit_set_loginuid(kuid_t loginuid
);
333 static inline kuid_t
audit_get_loginuid(struct task_struct
*tsk
)
335 return tsk
->loginuid
;
338 static inline unsigned int audit_get_sessionid(struct task_struct
*tsk
)
340 return tsk
->sessionid
;
343 extern void __audit_ipc_obj(struct kern_ipc_perm
*ipcp
);
344 extern void __audit_ipc_set_perm(unsigned long qbytes
, uid_t uid
, gid_t gid
, umode_t mode
);
345 extern void __audit_bprm(struct linux_binprm
*bprm
);
346 extern int __audit_socketcall(int nargs
, unsigned long *args
);
347 extern int __audit_sockaddr(int len
, void *addr
);
348 extern void __audit_fd_pair(int fd1
, int fd2
);
349 extern void __audit_mq_open(int oflag
, umode_t mode
, struct mq_attr
*attr
);
350 extern void __audit_mq_sendrecv(mqd_t mqdes
, size_t msg_len
, unsigned int msg_prio
, const struct timespec
*abs_timeout
);
351 extern void __audit_mq_notify(mqd_t mqdes
, const struct sigevent
*notification
);
352 extern void __audit_mq_getsetattr(mqd_t mqdes
, struct mq_attr
*mqstat
);
353 extern int __audit_log_bprm_fcaps(struct linux_binprm
*bprm
,
354 const struct cred
*new,
355 const struct cred
*old
);
356 extern void __audit_log_capset(const struct cred
*new, const struct cred
*old
);
357 extern void __audit_mmap_fd(int fd
, int flags
);
358 extern void __audit_log_kern_module(char *name
);
360 static inline void audit_ipc_obj(struct kern_ipc_perm
*ipcp
)
362 if (unlikely(!audit_dummy_context()))
363 __audit_ipc_obj(ipcp
);
365 static inline void audit_fd_pair(int fd1
, int fd2
)
367 if (unlikely(!audit_dummy_context()))
368 __audit_fd_pair(fd1
, fd2
);
370 static inline void audit_ipc_set_perm(unsigned long qbytes
, uid_t uid
, gid_t gid
, umode_t mode
)
372 if (unlikely(!audit_dummy_context()))
373 __audit_ipc_set_perm(qbytes
, uid
, gid
, mode
);
375 static inline void audit_bprm(struct linux_binprm
*bprm
)
377 if (unlikely(!audit_dummy_context()))
380 static inline int audit_socketcall(int nargs
, unsigned long *args
)
382 if (unlikely(!audit_dummy_context()))
383 return __audit_socketcall(nargs
, args
);
387 static inline int audit_socketcall_compat(int nargs
, u32
*args
)
389 unsigned long a
[AUDITSC_ARGS
];
392 if (audit_dummy_context())
395 for (i
= 0; i
< nargs
; i
++)
396 a
[i
] = (unsigned long)args
[i
];
397 return __audit_socketcall(nargs
, a
);
400 static inline int audit_sockaddr(int len
, void *addr
)
402 if (unlikely(!audit_dummy_context()))
403 return __audit_sockaddr(len
, addr
);
406 static inline void audit_mq_open(int oflag
, umode_t mode
, struct mq_attr
*attr
)
408 if (unlikely(!audit_dummy_context()))
409 __audit_mq_open(oflag
, mode
, attr
);
411 static inline void audit_mq_sendrecv(mqd_t mqdes
, size_t msg_len
, unsigned int msg_prio
, const struct timespec
*abs_timeout
)
413 if (unlikely(!audit_dummy_context()))
414 __audit_mq_sendrecv(mqdes
, msg_len
, msg_prio
, abs_timeout
);
416 static inline void audit_mq_notify(mqd_t mqdes
, const struct sigevent
*notification
)
418 if (unlikely(!audit_dummy_context()))
419 __audit_mq_notify(mqdes
, notification
);
421 static inline void audit_mq_getsetattr(mqd_t mqdes
, struct mq_attr
*mqstat
)
423 if (unlikely(!audit_dummy_context()))
424 __audit_mq_getsetattr(mqdes
, mqstat
);
427 static inline int audit_log_bprm_fcaps(struct linux_binprm
*bprm
,
428 const struct cred
*new,
429 const struct cred
*old
)
431 if (unlikely(!audit_dummy_context()))
432 return __audit_log_bprm_fcaps(bprm
, new, old
);
436 static inline void audit_log_capset(const struct cred
*new,
437 const struct cred
*old
)
439 if (unlikely(!audit_dummy_context()))
440 __audit_log_capset(new, old
);
443 static inline void audit_mmap_fd(int fd
, int flags
)
445 if (unlikely(!audit_dummy_context()))
446 __audit_mmap_fd(fd
, flags
);
449 static inline void audit_log_kern_module(char *name
)
451 if (!audit_dummy_context())
452 __audit_log_kern_module(name
);
455 extern int audit_n_rules
;
456 extern int audit_signals
;
457 #else /* CONFIG_AUDITSYSCALL */
458 static inline int audit_alloc(struct task_struct
*task
)
462 static inline void audit_free(struct task_struct
*task
)
464 static inline void audit_syscall_entry(int major
, unsigned long a0
,
465 unsigned long a1
, unsigned long a2
,
468 static inline void audit_syscall_exit(void *pt_regs
)
470 static inline bool audit_dummy_context(void)
474 static inline struct filename
*audit_reusename(const __user
char *name
)
478 static inline void audit_getname(struct filename
*name
)
480 static inline void __audit_inode(struct filename
*name
,
481 const struct dentry
*dentry
,
484 static inline void __audit_inode_child(struct inode
*parent
,
485 const struct dentry
*dentry
,
486 const unsigned char type
)
488 static inline void audit_inode(struct filename
*name
,
489 const struct dentry
*dentry
,
492 static inline void audit_file(struct file
*file
)
495 static inline void audit_inode_parent_hidden(struct filename
*name
,
496 const struct dentry
*dentry
)
498 static inline void audit_inode_child(struct inode
*parent
,
499 const struct dentry
*dentry
,
500 const unsigned char type
)
502 static inline void audit_core_dumps(long signr
)
504 static inline void __audit_seccomp(unsigned long syscall
, long signr
, int code
)
506 static inline void audit_seccomp(unsigned long syscall
, long signr
, int code
)
508 static inline int auditsc_get_stamp(struct audit_context
*ctx
,
509 struct timespec64
*t
, unsigned int *serial
)
513 static inline kuid_t
audit_get_loginuid(struct task_struct
*tsk
)
517 static inline unsigned int audit_get_sessionid(struct task_struct
*tsk
)
521 static inline void audit_ipc_obj(struct kern_ipc_perm
*ipcp
)
523 static inline void audit_ipc_set_perm(unsigned long qbytes
, uid_t uid
,
524 gid_t gid
, umode_t mode
)
526 static inline void audit_bprm(struct linux_binprm
*bprm
)
528 static inline int audit_socketcall(int nargs
, unsigned long *args
)
533 static inline int audit_socketcall_compat(int nargs
, u32
*args
)
538 static inline void audit_fd_pair(int fd1
, int fd2
)
540 static inline int audit_sockaddr(int len
, void *addr
)
544 static inline void audit_mq_open(int oflag
, umode_t mode
, struct mq_attr
*attr
)
546 static inline void audit_mq_sendrecv(mqd_t mqdes
, size_t msg_len
,
547 unsigned int msg_prio
,
548 const struct timespec
*abs_timeout
)
550 static inline void audit_mq_notify(mqd_t mqdes
,
551 const struct sigevent
*notification
)
553 static inline void audit_mq_getsetattr(mqd_t mqdes
, struct mq_attr
*mqstat
)
555 static inline int audit_log_bprm_fcaps(struct linux_binprm
*bprm
,
556 const struct cred
*new,
557 const struct cred
*old
)
561 static inline void audit_log_capset(const struct cred
*new,
562 const struct cred
*old
)
564 static inline void audit_mmap_fd(int fd
, int flags
)
567 static inline void audit_log_kern_module(char *name
)
571 static inline void audit_ptrace(struct task_struct
*t
)
573 #define audit_n_rules 0
574 #define audit_signals 0
575 #endif /* CONFIG_AUDITSYSCALL */
577 static inline bool audit_loginuid_set(struct task_struct
*tsk
)
579 return uid_valid(audit_get_loginuid(tsk
));
582 static inline void audit_log_string(struct audit_buffer
*ab
, const char *buf
)
584 audit_log_n_string(ab
, buf
, strlen(buf
));