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>
24 #ifndef _LINUX_AUDIT_H_
25 #define _LINUX_AUDIT_H_
27 #include <linux/sched.h>
28 #include <linux/elf.h>
30 /* The netlink messages for the audit system is divided into blocks:
31 * 1000 - 1099 are for commanding the audit system
32 * 1100 - 1199 user space trusted application messages
33 * 1200 - 1299 messages internal to the audit daemon
34 * 1300 - 1399 audit event messages
35 * 1400 - 1499 SE Linux use
36 * 1500 - 1999 future use
37 * 2000 is for otherwise unclassified kernel audit messages
39 * Messages from 1000-1199 are bi-directional. 1200-1299 are exclusively user
40 * space. Anything over that is kernel --> user space communication.
42 #define AUDIT_GET 1000 /* Get status */
43 #define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */
44 #define AUDIT_LIST 1002 /* List syscall filtering rules */
45 #define AUDIT_ADD 1003 /* Add syscall filtering rule */
46 #define AUDIT_DEL 1004 /* Delete syscall filtering rule */
47 #define AUDIT_USER 1005 /* Message from userspace -- deprecated */
48 #define AUDIT_LOGIN 1006 /* Define the login id and information */
49 #define AUDIT_WATCH_INS 1007 /* Insert file/dir watch entry */
50 #define AUDIT_WATCH_REM 1008 /* Remove file/dir watch entry */
51 #define AUDIT_WATCH_LIST 1009 /* List all file/dir watches */
52 #define AUDIT_SIGNAL_INFO 1010 /* Get info about sender of signal to auditd */
54 #define AUDIT_FIRST_USER_MSG 1100 /* Userspace messages uninteresting to kernel */
55 #define AUDIT_LAST_USER_MSG 1199
57 #define AUDIT_DAEMON_START 1200 /* Daemon startup record */
58 #define AUDIT_DAEMON_END 1201 /* Daemon normal stop record */
59 #define AUDIT_DAEMON_ABORT 1202 /* Daemon error stop record */
60 #define AUDIT_DAEMON_CONFIG 1203 /* Daemon config change */
62 #define AUDIT_SYSCALL 1300 /* Syscall event */
63 #define AUDIT_FS_WATCH 1301 /* Filesystem watch event */
64 #define AUDIT_PATH 1302 /* Filename path information */
65 #define AUDIT_IPC 1303 /* IPC record */
66 #define AUDIT_SOCKETCALL 1304 /* sys_socketcall arguments */
67 #define AUDIT_CONFIG_CHANGE 1305 /* Audit system configuration change */
68 #define AUDIT_SOCKADDR 1306 /* sockaddr copied as syscall arg */
69 #define AUDIT_CWD 1307 /* Current working directory */
71 #define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
72 #define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
73 #define AUDIT_AVC_PATH 1402 /* dentry, vfsmount pair from avc */
75 #define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
78 #define AUDIT_PER_TASK 0x01 /* Apply rule at task creation (not syscall) */
79 #define AUDIT_AT_ENTRY 0x02 /* Apply rule at syscall entry */
80 #define AUDIT_AT_EXIT 0x04 /* Apply rule at syscall exit */
81 #define AUDIT_PREPEND 0x10 /* Prepend to front of list */
84 #define AUDIT_NEVER 0 /* Do not build context if rule matches */
85 #define AUDIT_POSSIBLE 1 /* Build context if rule matches */
86 #define AUDIT_ALWAYS 2 /* Generate audit record if rule matches */
88 /* Rule structure sizes -- if these change, different AUDIT_ADD and
89 * AUDIT_LIST commands must be implemented. */
90 #define AUDIT_MAX_FIELDS 64
91 #define AUDIT_BITMASK_SIZE 64
92 #define AUDIT_WORD(nr) ((__u32)((nr)/32))
93 #define AUDIT_BIT(nr) (1 << ((nr) - AUDIT_WORD(nr)*32))
96 /* These are useful when checking the
97 * task structure at task creation time
98 * (AUDIT_PER_TASK). */
103 #define AUDIT_FSUID 4
107 #define AUDIT_FSGID 8
108 #define AUDIT_LOGINUID 9
109 #define AUDIT_PERS 10
110 #define AUDIT_ARCH 11
112 /* These are ONLY useful when checking
113 * at syscall exit time (AUDIT_AT_EXIT). */
114 #define AUDIT_DEVMAJOR 100
115 #define AUDIT_DEVMINOR 101
116 #define AUDIT_INODE 102
117 #define AUDIT_EXIT 103
118 #define AUDIT_SUCCESS 104 /* exit >= 0; value ignored */
120 #define AUDIT_ARG0 200
121 #define AUDIT_ARG1 (AUDIT_ARG0+1)
122 #define AUDIT_ARG2 (AUDIT_ARG0+2)
123 #define AUDIT_ARG3 (AUDIT_ARG0+3)
125 #define AUDIT_NEGATE 0x80000000
130 #define AUDIT_STATUS_ENABLED 0x0001
131 #define AUDIT_STATUS_FAILURE 0x0002
132 #define AUDIT_STATUS_PID 0x0004
133 #define AUDIT_STATUS_RATE_LIMIT 0x0008
134 #define AUDIT_STATUS_BACKLOG_LIMIT 0x0010
135 /* Failure-to-log actions */
136 #define AUDIT_FAIL_SILENT 0
137 #define AUDIT_FAIL_PRINTK 1
138 #define AUDIT_FAIL_PANIC 2
140 /* distinguish syscall tables */
141 #define __AUDIT_ARCH_64BIT 0x80000000
142 #define __AUDIT_ARCH_LE 0x40000000
143 #define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
144 #define AUDIT_ARCH_ARM (EM_ARM|__AUDIT_ARCH_LE)
145 #define AUDIT_ARCH_ARMEB (EM_ARM)
146 #define AUDIT_ARCH_CRIS (EM_CRIS|__AUDIT_ARCH_LE)
147 #define AUDIT_ARCH_FRV (EM_FRV)
148 #define AUDIT_ARCH_H8300 (EM_H8_300)
149 #define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
150 #define AUDIT_ARCH_IA64 (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
151 #define AUDIT_ARCH_M32R (EM_M32R)
152 #define AUDIT_ARCH_M68K (EM_68K)
153 #define AUDIT_ARCH_MIPS (EM_MIPS)
154 #define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
155 #define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
156 #define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
157 #define AUDIT_ARCH_PARISC (EM_PARISC)
158 #define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT)
159 #define AUDIT_ARCH_PPC (EM_PPC)
160 #define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
161 #define AUDIT_ARCH_S390 (EM_S390)
162 #define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT)
163 #define AUDIT_ARCH_SH (EM_SH)
164 #define AUDIT_ARCH_SHEL (EM_SH|__AUDIT_ARCH_LE)
165 #define AUDIT_ARCH_SH64 (EM_SH|__AUDIT_ARCH_64BIT)
166 #define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
167 #define AUDIT_ARCH_SPARC (EM_SPARC)
168 #define AUDIT_ARCH_SPARC64 (EM_SPARCV9|__AUDIT_ARCH_64BIT)
169 #define AUDIT_ARCH_V850 (EM_V850|__AUDIT_ARCH_LE)
170 #define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
172 struct audit_status {
173 __u32 mask; /* Bit mask for valid entries */
174 __u32 enabled; /* 1 = enabled, 0 = disabled */
175 __u32 failure; /* Failure-to-log action */
176 __u32 pid; /* pid of auditd process */
177 __u32 rate_limit; /* messages rate limit (per second) */
178 __u32 backlog_limit; /* waiting messages limit */
179 __u32 lost; /* messages lost */
180 __u32 backlog; /* messages waiting in queue */
183 struct audit_rule { /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */
184 __u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
185 __u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
187 __u32 mask[AUDIT_BITMASK_SIZE];
188 __u32 fields[AUDIT_MAX_FIELDS];
189 __u32 values[AUDIT_MAX_FIELDS];
194 struct audit_sig_info {
200 struct audit_context;
203 #define AUDITSC_INVALID 0
204 #define AUDITSC_SUCCESS 1
205 #define AUDITSC_FAILURE 2
206 #define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS )
207 #ifdef CONFIG_AUDITSYSCALL
208 /* These are defined in auditsc.c */
210 extern int audit_alloc(struct task_struct *task);
211 extern void audit_free(struct task_struct *task);
212 extern void audit_syscall_entry(struct task_struct *task, int arch,
213 int major, unsigned long a0, unsigned long a1,
214 unsigned long a2, unsigned long a3);
215 extern void audit_syscall_exit(struct task_struct *task, int failed, long return_code);
216 extern void audit_getname(const char *name);
217 extern void audit_putname(const char *name);
218 extern void audit_inode(const char *name, const struct inode *inode);
220 /* Private API (for audit.c only) */
221 extern int audit_receive_filter(int type, int pid, int uid, int seq,
222 void *data, uid_t loginuid);
223 extern unsigned int audit_serial(void);
224 extern void auditsc_get_stamp(struct audit_context *ctx,
225 struct timespec *t, unsigned int *serial);
226 extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid);
227 extern uid_t audit_get_loginuid(struct audit_context *ctx);
228 extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
229 extern int audit_socketcall(int nargs, unsigned long *args);
230 extern int audit_sockaddr(int len, void *addr);
231 extern int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt);
232 extern void audit_signal_info(int sig, struct task_struct *t);
234 #define audit_alloc(t) ({ 0; })
235 #define audit_free(t) do { ; } while (0)
236 #define audit_syscall_entry(t,ta,a,b,c,d,e) do { ; } while (0)
237 #define audit_syscall_exit(t,f,r) do { ; } while (0)
238 #define audit_getname(n) do { ; } while (0)
239 #define audit_putname(n) do { ; } while (0)
240 #define audit_inode(n,i) do { ; } while (0)
241 #define audit_receive_filter(t,p,u,s,d,l) ({ -EOPNOTSUPP; })
242 #define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
243 #define audit_get_loginuid(c) ({ -1; })
244 #define audit_ipc_perms(q,u,g,m) ({ 0; })
245 #define audit_socketcall(n,a) ({ 0; })
246 #define audit_sockaddr(len, addr) ({ 0; })
247 #define audit_avc_path(dentry, mnt) ({ 0; })
248 #define audit_signal_info(s,t) do { ; } while (0)
252 /* These are defined in audit.c */
254 extern void audit_log(struct audit_context *ctx, int type,
255 const char *fmt, ...)
256 __attribute__((format(printf,3,4)));
258 extern struct audit_buffer *audit_log_start(struct audit_context *ctx,int type);
259 extern void audit_log_format(struct audit_buffer *ab,
260 const char *fmt, ...)
261 __attribute__((format(printf,2,3)));
262 extern void audit_log_end(struct audit_buffer *ab);
263 extern void audit_log_hex(struct audit_buffer *ab,
264 const unsigned char *buf,
266 extern void audit_log_untrustedstring(struct audit_buffer *ab,
268 extern void audit_log_d_path(struct audit_buffer *ab,
270 struct dentry *dentry,
271 struct vfsmount *vfsmnt);
272 /* Private API (for auditsc.c only) */
273 extern void audit_send_reply(int pid, int seq, int type,
275 void *payload, int size);
276 extern void audit_log_lost(const char *message);
278 #define audit_log(c,t,f,...) do { ; } while (0)
279 #define audit_log_start(c,t) ({ NULL; })
280 #define audit_log_vformat(b,f,a) do { ; } while (0)
281 #define audit_log_format(b,f,...) do { ; } while (0)
282 #define audit_log_end(b) do { ; } while (0)
283 #define audit_log_hex(a,b,l) do { ; } while (0)
284 #define audit_log_untrustedstring(a,s) do { ; } while (0)
285 #define audit_log_d_path(b,p,d,v) do { ; } while (0)