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23#ifndef _LINUX_AUDIT_H_
24#define _LINUX_AUDIT_H_
25
26#include <linux/sched.h>
27#include <linux/ptrace.h>
28#include <uapi/linux/audit.h>
29
30struct audit_sig_info {
31 uid_t uid;
32 pid_t pid;
33 char ctx[0];
34};
35
36struct audit_buffer;
37struct audit_context;
38struct inode;
39struct netlink_skb_parms;
40struct path;
41struct linux_binprm;
42struct mq_attr;
43struct mqstat;
44struct audit_watch;
45struct audit_tree;
46struct sk_buff;
47
48struct audit_krule {
49 u32 pflags;
50 u32 flags;
51 u32 listnr;
52 u32 action;
53 u32 mask[AUDIT_BITMASK_SIZE];
54 u32 buflen;
55 u32 field_count;
56 char *filterkey;
57 struct audit_field *fields;
58 struct audit_field *arch_f;
59 struct audit_field *inode_f;
60 struct audit_watch *watch;
61 struct audit_tree *tree;
62 struct list_head rlist;
63 struct list_head list;
64 u64 prio;
65};
66
67
68#define AUDIT_LOGINUID_LEGACY 0x1
69
70struct audit_field {
71 u32 type;
72 union {
73 u32 val;
74 kuid_t uid;
75 kgid_t gid;
76 struct {
77 char *lsm_str;
78 void *lsm_rule;
79 };
80 };
81 u32 op;
82};
83
84extern int is_audit_feature_set(int which);
85
86extern int __init audit_register_class(int class, unsigned *list);
87extern int audit_classify_syscall(int abi, unsigned syscall);
88extern int audit_classify_arch(int arch);
89
90extern unsigned compat_write_class[];
91extern unsigned compat_read_class[];
92extern unsigned compat_dir_class[];
93extern unsigned compat_chattr_class[];
94extern unsigned compat_signal_class[];
95
96extern int audit_classify_compat_syscall(int abi, unsigned syscall);
97
98
99#define AUDIT_TYPE_UNKNOWN 0
100#define AUDIT_TYPE_NORMAL 1
101#define AUDIT_TYPE_PARENT 2
102#define AUDIT_TYPE_CHILD_DELETE 3
103#define AUDIT_TYPE_CHILD_CREATE 4
104
105
106#define AUDITSC_ARGS 6
107
108struct filename;
109
110extern void audit_log_session_info(struct audit_buffer *ab);
111
112#ifdef CONFIG_AUDIT_COMPAT_GENERIC
113#define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
114#else
115#define audit_is_compat(arch) false
116#endif
117
118#ifdef CONFIG_AUDITSYSCALL
119#include <asm/syscall.h>
120
121
122
123extern int audit_alloc(struct task_struct *task);
124extern void __audit_free(struct task_struct *task);
125extern void __audit_syscall_entry(int major, unsigned long a0, unsigned long a1,
126 unsigned long a2, unsigned long a3);
127extern void __audit_syscall_exit(int ret_success, long ret_value);
128extern struct filename *__audit_reusename(const __user char *uptr);
129extern void __audit_getname(struct filename *name);
130
131#define AUDIT_INODE_PARENT 1
132#define AUDIT_INODE_HIDDEN 2
133extern void __audit_inode(struct filename *name, const struct dentry *dentry,
134 unsigned int flags);
135extern void __audit_file(const struct file *);
136extern void __audit_inode_child(const struct inode *parent,
137 const struct dentry *dentry,
138 const unsigned char type);
139extern void __audit_seccomp(unsigned long syscall, long signr, int code);
140extern void __audit_ptrace(struct task_struct *t);
141
142static inline int audit_dummy_context(void)
143{
144 void *p = current->audit_context;
145 return !p || *(int *)p;
146}
147static inline void audit_free(struct task_struct *task)
148{
149 if (unlikely(task->audit_context))
150 __audit_free(task);
151}
152static inline void audit_syscall_entry(int major, unsigned long a0,
153 unsigned long a1, unsigned long a2,
154 unsigned long a3)
155{
156 if (unlikely(current->audit_context))
157 __audit_syscall_entry(major, a0, a1, a2, a3);
158}
159static inline void audit_syscall_exit(void *pt_regs)
160{
161 if (unlikely(current->audit_context)) {
162 int success = is_syscall_success(pt_regs);
163 long return_code = regs_return_value(pt_regs);
164
165 __audit_syscall_exit(success, return_code);
166 }
167}
168static inline struct filename *audit_reusename(const __user char *name)
169{
170 if (unlikely(!audit_dummy_context()))
171 return __audit_reusename(name);
172 return NULL;
173}
174static inline void audit_getname(struct filename *name)
175{
176 if (unlikely(!audit_dummy_context()))
177 __audit_getname(name);
178}
179static inline void audit_inode(struct filename *name,
180 const struct dentry *dentry,
181 unsigned int parent) {
182 if (unlikely(!audit_dummy_context())) {
183 unsigned int flags = 0;
184 if (parent)
185 flags |= AUDIT_INODE_PARENT;
186 __audit_inode(name, dentry, flags);
187 }
188}
189static inline void audit_file(struct file *file)
190{
191 if (unlikely(!audit_dummy_context()))
192 __audit_file(file);
193}
194static inline void audit_inode_parent_hidden(struct filename *name,
195 const struct dentry *dentry)
196{
197 if (unlikely(!audit_dummy_context()))
198 __audit_inode(name, dentry,
199 AUDIT_INODE_PARENT | AUDIT_INODE_HIDDEN);
200}
201static inline void audit_inode_child(const struct inode *parent,
202 const struct dentry *dentry,
203 const unsigned char type) {
204 if (unlikely(!audit_dummy_context()))
205 __audit_inode_child(parent, dentry, type);
206}
207void audit_core_dumps(long signr);
208
209static inline void audit_seccomp(unsigned long syscall, long signr, int code)
210{
211
212 if (signr || unlikely(!audit_dummy_context()))
213 __audit_seccomp(syscall, signr, code);
214}
215
216static inline void audit_ptrace(struct task_struct *t)
217{
218 if (unlikely(!audit_dummy_context()))
219 __audit_ptrace(t);
220}
221
222
223extern unsigned int audit_serial(void);
224extern int auditsc_get_stamp(struct audit_context *ctx,
225 struct timespec *t, unsigned int *serial);
226extern int audit_set_loginuid(kuid_t loginuid);
227
228static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
229{
230 return tsk->loginuid;
231}
232
233static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
234{
235 return tsk->sessionid;
236}
237
238extern void __audit_ipc_obj(struct kern_ipc_perm *ipcp);
239extern void __audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode);
240extern void __audit_bprm(struct linux_binprm *bprm);
241extern int __audit_socketcall(int nargs, unsigned long *args);
242extern int __audit_sockaddr(int len, void *addr);
243extern void __audit_fd_pair(int fd1, int fd2);
244extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);
245extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);
246extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);
247extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
248extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
249 const struct cred *new,
250 const struct cred *old);
251extern void __audit_log_capset(const struct cred *new, const struct cred *old);
252extern void __audit_mmap_fd(int fd, int flags);
253
254static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
255{
256 if (unlikely(!audit_dummy_context()))
257 __audit_ipc_obj(ipcp);
258}
259static inline void audit_fd_pair(int fd1, int fd2)
260{
261 if (unlikely(!audit_dummy_context()))
262 __audit_fd_pair(fd1, fd2);
263}
264static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid, gid_t gid, umode_t mode)
265{
266 if (unlikely(!audit_dummy_context()))
267 __audit_ipc_set_perm(qbytes, uid, gid, mode);
268}
269static inline void audit_bprm(struct linux_binprm *bprm)
270{
271 if (unlikely(!audit_dummy_context()))
272 __audit_bprm(bprm);
273}
274static inline int audit_socketcall(int nargs, unsigned long *args)
275{
276 if (unlikely(!audit_dummy_context()))
277 return __audit_socketcall(nargs, args);
278 return 0;
279}
280static inline int audit_sockaddr(int len, void *addr)
281{
282 if (unlikely(!audit_dummy_context()))
283 return __audit_sockaddr(len, addr);
284 return 0;
285}
286static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
287{
288 if (unlikely(!audit_dummy_context()))
289 __audit_mq_open(oflag, mode, attr);
290}
291static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout)
292{
293 if (unlikely(!audit_dummy_context()))
294 __audit_mq_sendrecv(mqdes, msg_len, msg_prio, abs_timeout);
295}
296static inline void audit_mq_notify(mqd_t mqdes, const struct sigevent *notification)
297{
298 if (unlikely(!audit_dummy_context()))
299 __audit_mq_notify(mqdes, notification);
300}
301static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
302{
303 if (unlikely(!audit_dummy_context()))
304 __audit_mq_getsetattr(mqdes, mqstat);
305}
306
307static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
308 const struct cred *new,
309 const struct cred *old)
310{
311 if (unlikely(!audit_dummy_context()))
312 return __audit_log_bprm_fcaps(bprm, new, old);
313 return 0;
314}
315
316static inline void audit_log_capset(const struct cred *new,
317 const struct cred *old)
318{
319 if (unlikely(!audit_dummy_context()))
320 __audit_log_capset(new, old);
321}
322
323static inline void audit_mmap_fd(int fd, int flags)
324{
325 if (unlikely(!audit_dummy_context()))
326 __audit_mmap_fd(fd, flags);
327}
328
329extern int audit_n_rules;
330extern int audit_signals;
331#else
332static inline int audit_alloc(struct task_struct *task)
333{
334 return 0;
335}
336static inline void audit_free(struct task_struct *task)
337{ }
338static inline void audit_syscall_entry(int major, unsigned long a0,
339 unsigned long a1, unsigned long a2,
340 unsigned long a3)
341{ }
342static inline void audit_syscall_exit(void *pt_regs)
343{ }
344static inline int audit_dummy_context(void)
345{
346 return 1;
347}
348static inline struct filename *audit_reusename(const __user char *name)
349{
350 return NULL;
351}
352static inline void audit_getname(struct filename *name)
353{ }
354static inline void __audit_inode(struct filename *name,
355 const struct dentry *dentry,
356 unsigned int flags)
357{ }
358static inline void __audit_inode_child(const struct inode *parent,
359 const struct dentry *dentry,
360 const unsigned char type)
361{ }
362static inline void audit_inode(struct filename *name,
363 const struct dentry *dentry,
364 unsigned int parent)
365{ }
366static inline void audit_file(struct file *file)
367{
368}
369static inline void audit_inode_parent_hidden(struct filename *name,
370 const struct dentry *dentry)
371{ }
372static inline void audit_inode_child(const struct inode *parent,
373 const struct dentry *dentry,
374 const unsigned char type)
375{ }
376static inline void audit_core_dumps(long signr)
377{ }
378static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
379{ }
380static inline void audit_seccomp(unsigned long syscall, long signr, int code)
381{ }
382static inline int auditsc_get_stamp(struct audit_context *ctx,
383 struct timespec *t, unsigned int *serial)
384{
385 return 0;
386}
387static inline kuid_t audit_get_loginuid(struct task_struct *tsk)
388{
389 return INVALID_UID;
390}
391static inline unsigned int audit_get_sessionid(struct task_struct *tsk)
392{
393 return -1;
394}
395static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
396{ }
397static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
398 gid_t gid, umode_t mode)
399{ }
400static inline void audit_bprm(struct linux_binprm *bprm)
401{ }
402static inline int audit_socketcall(int nargs, unsigned long *args)
403{
404 return 0;
405}
406static inline void audit_fd_pair(int fd1, int fd2)
407{ }
408static inline int audit_sockaddr(int len, void *addr)
409{
410 return 0;
411}
412static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
413{ }
414static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
415 unsigned int msg_prio,
416 const struct timespec *abs_timeout)
417{ }
418static inline void audit_mq_notify(mqd_t mqdes,
419 const struct sigevent *notification)
420{ }
421static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
422{ }
423static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
424 const struct cred *new,
425 const struct cred *old)
426{
427 return 0;
428}
429static inline void audit_log_capset(const struct cred *new,
430 const struct cred *old)
431{ }
432static inline void audit_mmap_fd(int fd, int flags)
433{ }
434static inline void audit_ptrace(struct task_struct *t)
435{ }
436#define audit_n_rules 0
437#define audit_signals 0
438#endif
439
440static inline bool audit_loginuid_set(struct task_struct *tsk)
441{
442 return uid_valid(audit_get_loginuid(tsk));
443}
444
445#ifdef CONFIG_AUDIT
446
447
448extern __printf(4, 5)
449void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
450 const char *fmt, ...);
451
452extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
453extern __printf(2, 3)
454void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
455extern void audit_log_end(struct audit_buffer *ab);
456extern int audit_string_contains_control(const char *string,
457 size_t len);
458extern void audit_log_n_hex(struct audit_buffer *ab,
459 const unsigned char *buf,
460 size_t len);
461extern void audit_log_n_string(struct audit_buffer *ab,
462 const char *buf,
463 size_t n);
464extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
465 const char *string,
466 size_t n);
467extern void audit_log_untrustedstring(struct audit_buffer *ab,
468 const char *string);
469extern void audit_log_d_path(struct audit_buffer *ab,
470 const char *prefix,
471 const struct path *path);
472extern void audit_log_key(struct audit_buffer *ab,
473 char *key);
474extern void audit_log_link_denied(const char *operation,
475 struct path *link);
476extern void audit_log_lost(const char *message);
477#ifdef CONFIG_SECURITY
478extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
479#else
480static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
481{ }
482#endif
483
484extern int audit_log_task_context(struct audit_buffer *ab);
485extern void audit_log_task_info(struct audit_buffer *ab,
486 struct task_struct *tsk);
487
488extern int audit_update_lsm_rules(void);
489
490
491extern int audit_filter_user(int type);
492extern int audit_filter_type(int type);
493extern int audit_rule_change(int type, __u32 portid, int seq,
494 void *data, size_t datasz);
495extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
496
497extern u32 audit_enabled;
498#else
499static inline __printf(4, 5)
500void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
501 const char *fmt, ...)
502{ }
503static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
504 gfp_t gfp_mask, int type)
505{
506 return NULL;
507}
508static inline __printf(2, 3)
509void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
510{ }
511static inline void audit_log_end(struct audit_buffer *ab)
512{ }
513static inline void audit_log_n_hex(struct audit_buffer *ab,
514 const unsigned char *buf, size_t len)
515{ }
516static inline void audit_log_n_string(struct audit_buffer *ab,
517 const char *buf, size_t n)
518{ }
519static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
520 const char *string, size_t n)
521{ }
522static inline void audit_log_untrustedstring(struct audit_buffer *ab,
523 const char *string)
524{ }
525static inline void audit_log_d_path(struct audit_buffer *ab,
526 const char *prefix,
527 const struct path *path)
528{ }
529static inline void audit_log_key(struct audit_buffer *ab, char *key)
530{ }
531static inline void audit_log_link_denied(const char *string,
532 const struct path *link)
533{ }
534static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
535{ }
536static inline int audit_log_task_context(struct audit_buffer *ab)
537{
538 return 0;
539}
540static inline void audit_log_task_info(struct audit_buffer *ab,
541 struct task_struct *tsk)
542{ }
543#define audit_enabled 0
544#endif
545static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
546{
547 audit_log_n_string(ab, buf, strlen(buf));
548}
549
550#endif
551
