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85c87212005-04-29 16:23:29 +01001/* audit.h -- Auditing support
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 *
3 * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
4 * All Rights Reserved.
5 *
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.
10 *
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.
15 *
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
19 *
20 * Written by Rickard E. (Rik) Faith <faith@redhat.com>
21 *
22 */
23
24#ifndef _LINUX_AUDIT_H_
25#define _LINUX_AUDIT_H_
26
2fd6f582005-04-29 16:08:28 +010027#include <linux/sched.h>
28#include <linux/elf.h>
29
Steve Grubbc0404992005-05-13 18:17:42 +010030/* 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
38 *
39 * Messages from 1000-1199 are bi-directional. 1200-1299 are exclusively user
40 * space. Anything over that is kernel --> user space communication.
41 */
Steve Grubbc2f0c7c2005-05-06 12:38:39 +010042#define AUDIT_GET 1000 /* Get status */
43#define AUDIT_SET 1001 /* Set status (enable/disable/auditd) */
Steve Grubbc0404992005-05-13 18:17:42 +010044#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 */
Steve Grubbc2f0c7c2005-05-06 12:38:39 +010048#define AUDIT_LOGIN 1006 /* Define the login id and information */
Steve Grubbc0404992005-05-13 18:17:42 +010049#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 */
53
David Woodhouse4a4cd632005-06-22 14:56:47 +010054#define AUDIT_FIRST_USER_MSG 1100 /* Userspace messages mostly uninteresting to kernel */
55#define AUDIT_USER_AVC 1107 /* We filter this differently */
David Woodhouse209aba02005-05-18 10:21:07 +010056#define AUDIT_LAST_USER_MSG 1199
Steve Grubbc0404992005-05-13 18:17:42 +010057
58#define AUDIT_DAEMON_START 1200 /* Daemon startup record */
59#define AUDIT_DAEMON_END 1201 /* Daemon normal stop record */
60#define AUDIT_DAEMON_ABORT 1202 /* Daemon error stop record */
61#define AUDIT_DAEMON_CONFIG 1203 /* Daemon config change */
62
63#define AUDIT_SYSCALL 1300 /* Syscall event */
64#define AUDIT_FS_WATCH 1301 /* Filesystem watch event */
David Woodhouse8f37d472005-05-27 12:17:28 +010065#define AUDIT_PATH 1302 /* Filename path information */
Steve Grubbc0404992005-05-13 18:17:42 +010066#define AUDIT_IPC 1303 /* IPC record */
David Woodhouse3ec3b2f2005-05-17 12:08:48 +010067#define AUDIT_SOCKETCALL 1304 /* sys_socketcall arguments */
Steve Grubbc0404992005-05-13 18:17:42 +010068#define AUDIT_CONFIG_CHANGE 1305 /* Audit system configuration change */
David Woodhouse3ec3b2f2005-05-17 12:08:48 +010069#define AUDIT_SOCKADDR 1306 /* sockaddr copied as syscall arg */
David Woodhouse8f37d472005-05-27 12:17:28 +010070#define AUDIT_CWD 1307 /* Current working directory */
Steve Grubbc0404992005-05-13 18:17:42 +010071
72#define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
73#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
Stephen Smalley01116102005-05-21 00:15:52 +010074#define AUDIT_AVC_PATH 1402 /* dentry, vfsmount pair from avc */
Steve Grubbc2f0c7c2005-05-06 12:38:39 +010075
76#define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78/* Rule flags */
David Woodhouse0f45aa12005-06-19 19:35:50 +010079#define AUDIT_FILTER_USER 0x00 /* Apply rule to user-generated messages */
80#define AUDIT_FILTER_TASK 0x01 /* Apply rule at task creation (not syscall) */
81#define AUDIT_FILTER_ENTRY 0x02 /* Apply rule at syscall entry */
82#define AUDIT_FILTER_WATCH 0x03 /* Apply rule to file system watches */
83#define AUDIT_FILTER_EXIT 0x04 /* Apply rule at syscall exit */
84
85#define AUDIT_NR_FILTERS 5
86
87#define AUDIT_FILTER_PREPEND 0x10 /* Prepend to front of list */
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
89/* Rule actions */
90#define AUDIT_NEVER 0 /* Do not build context if rule matches */
91#define AUDIT_POSSIBLE 1 /* Build context if rule matches */
92#define AUDIT_ALWAYS 2 /* Generate audit record if rule matches */
93
94/* Rule structure sizes -- if these change, different AUDIT_ADD and
95 * AUDIT_LIST commands must be implemented. */
96#define AUDIT_MAX_FIELDS 64
97#define AUDIT_BITMASK_SIZE 64
98#define AUDIT_WORD(nr) ((__u32)((nr)/32))
99#define AUDIT_BIT(nr) (1 << ((nr) - AUDIT_WORD(nr)*32))
100
101/* Rule fields */
102 /* These are useful when checking the
103 * task structure at task creation time
104 * (AUDIT_PER_TASK). */
105#define AUDIT_PID 0
106#define AUDIT_UID 1
107#define AUDIT_EUID 2
108#define AUDIT_SUID 3
109#define AUDIT_FSUID 4
110#define AUDIT_GID 5
111#define AUDIT_EGID 6
112#define AUDIT_SGID 7
113#define AUDIT_FSGID 8
114#define AUDIT_LOGINUID 9
115#define AUDIT_PERS 10
2fd6f582005-04-29 16:08:28 +0100116#define AUDIT_ARCH 11
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
118 /* These are ONLY useful when checking
119 * at syscall exit time (AUDIT_AT_EXIT). */
120#define AUDIT_DEVMAJOR 100
121#define AUDIT_DEVMINOR 101
122#define AUDIT_INODE 102
123#define AUDIT_EXIT 103
124#define AUDIT_SUCCESS 104 /* exit >= 0; value ignored */
125
126#define AUDIT_ARG0 200
127#define AUDIT_ARG1 (AUDIT_ARG0+1)
128#define AUDIT_ARG2 (AUDIT_ARG0+2)
129#define AUDIT_ARG3 (AUDIT_ARG0+3)
130
131#define AUDIT_NEGATE 0x80000000
132
133
134/* Status symbols */
135 /* Mask values */
136#define AUDIT_STATUS_ENABLED 0x0001
137#define AUDIT_STATUS_FAILURE 0x0002
138#define AUDIT_STATUS_PID 0x0004
139#define AUDIT_STATUS_RATE_LIMIT 0x0008
140#define AUDIT_STATUS_BACKLOG_LIMIT 0x0010
141 /* Failure-to-log actions */
142#define AUDIT_FAIL_SILENT 0
143#define AUDIT_FAIL_PRINTK 1
144#define AUDIT_FAIL_PANIC 2
145
2fd6f582005-04-29 16:08:28 +0100146/* distinguish syscall tables */
147#define __AUDIT_ARCH_64BIT 0x80000000
148#define __AUDIT_ARCH_LE 0x40000000
149#define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
150#define AUDIT_ARCH_ARM (EM_ARM|__AUDIT_ARCH_LE)
151#define AUDIT_ARCH_ARMEB (EM_ARM)
152#define AUDIT_ARCH_CRIS (EM_CRIS|__AUDIT_ARCH_LE)
153#define AUDIT_ARCH_FRV (EM_FRV)
154#define AUDIT_ARCH_H8300 (EM_H8_300)
155#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
156#define AUDIT_ARCH_IA64 (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
157#define AUDIT_ARCH_M32R (EM_M32R)
158#define AUDIT_ARCH_M68K (EM_68K)
159#define AUDIT_ARCH_MIPS (EM_MIPS)
160#define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
161#define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
162#define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
163#define AUDIT_ARCH_PARISC (EM_PARISC)
164#define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT)
165#define AUDIT_ARCH_PPC (EM_PPC)
166#define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
167#define AUDIT_ARCH_S390 (EM_S390)
168#define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT)
169#define AUDIT_ARCH_SH (EM_SH)
170#define AUDIT_ARCH_SHEL (EM_SH|__AUDIT_ARCH_LE)
171#define AUDIT_ARCH_SH64 (EM_SH|__AUDIT_ARCH_64BIT)
172#define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
173#define AUDIT_ARCH_SPARC (EM_SPARC)
David S. Millerf7ceba32005-07-10 19:29:45 -0700174#define AUDIT_ARCH_SPARC64 (EM_SPARCV9|__AUDIT_ARCH_64BIT)
2fd6f582005-04-29 16:08:28 +0100175#define AUDIT_ARCH_V850 (EM_V850|__AUDIT_ARCH_LE)
176#define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178struct audit_status {
179 __u32 mask; /* Bit mask for valid entries */
Steve Grubb23f32d12005-05-13 18:35:15 +0100180 __u32 enabled; /* 1 = enabled, 0 = disabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 __u32 failure; /* Failure-to-log action */
182 __u32 pid; /* pid of auditd process */
183 __u32 rate_limit; /* messages rate limit (per second) */
184 __u32 backlog_limit; /* waiting messages limit */
185 __u32 lost; /* messages lost */
186 __u32 backlog; /* messages waiting in queue */
187};
188
189struct audit_rule { /* for AUDIT_LIST, AUDIT_ADD, and AUDIT_DEL */
190 __u32 flags; /* AUDIT_PER_{TASK,CALL}, AUDIT_PREPEND */
191 __u32 action; /* AUDIT_NEVER, AUDIT_POSSIBLE, AUDIT_ALWAYS */
192 __u32 field_count;
193 __u32 mask[AUDIT_BITMASK_SIZE];
194 __u32 fields[AUDIT_MAX_FIELDS];
195 __u32 values[AUDIT_MAX_FIELDS];
196};
197
198#ifdef __KERNEL__
199
Steve Grubbc2f0c7c2005-05-06 12:38:39 +0100200struct audit_sig_info {
201 uid_t uid;
202 pid_t pid;
203};
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205struct audit_buffer;
206struct audit_context;
207struct inode;
David Woodhouse5bb289b2005-06-24 14:14:05 +0100208struct netlink_skb_parms;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
2fd6f582005-04-29 16:08:28 +0100210#define AUDITSC_INVALID 0
211#define AUDITSC_SUCCESS 1
212#define AUDITSC_FAILURE 2
213#define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214#ifdef CONFIG_AUDITSYSCALL
215/* These are defined in auditsc.c */
216 /* Public API */
217extern int audit_alloc(struct task_struct *task);
218extern void audit_free(struct task_struct *task);
2fd6f582005-04-29 16:08:28 +0100219extern void audit_syscall_entry(struct task_struct *task, int arch,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 int major, unsigned long a0, unsigned long a1,
221 unsigned long a2, unsigned long a3);
2fd6f582005-04-29 16:08:28 +0100222extern void audit_syscall_exit(struct task_struct *task, int failed, long return_code);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223extern void audit_getname(const char *name);
224extern void audit_putname(const char *name);
David Woodhouseae7b9612005-06-20 16:11:05 +0100225extern void audit_inode(const char *name, const struct inode *inode, unsigned flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227 /* Private API (for audit.c only) */
228extern int audit_receive_filter(int type, int pid, int uid, int seq,
Serge Hallync94c2572005-04-29 16:27:17 +0100229 void *data, uid_t loginuid);
David Woodhousebfb44962005-05-21 21:08:09 +0100230extern unsigned int audit_serial(void);
231extern void auditsc_get_stamp(struct audit_context *ctx,
232 struct timespec *t, unsigned int *serial);
Steve Grubb456be6c2005-04-29 17:30:07 +0100233extern int audit_set_loginuid(struct task_struct *task, uid_t loginuid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234extern uid_t audit_get_loginuid(struct audit_context *ctx);
235extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
David Woodhouse3ec3b2f2005-05-17 12:08:48 +0100236extern int audit_socketcall(int nargs, unsigned long *args);
237extern int audit_sockaddr(int len, void *addr);
Stephen Smalley01116102005-05-21 00:15:52 +0100238extern int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt);
Steve Grubbc2f0c7c2005-05-06 12:38:39 +0100239extern void audit_signal_info(int sig, struct task_struct *t);
David Woodhouse5bb289b2005-06-24 14:14:05 +0100240extern int audit_filter_user(struct netlink_skb_parms *cb, int type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241#else
242#define audit_alloc(t) ({ 0; })
243#define audit_free(t) do { ; } while (0)
2fd6f582005-04-29 16:08:28 +0100244#define audit_syscall_entry(t,ta,a,b,c,d,e) do { ; } while (0)
245#define audit_syscall_exit(t,f,r) do { ; } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246#define audit_getname(n) do { ; } while (0)
247#define audit_putname(n) do { ; } while (0)
David Woodhouseae7b9612005-06-20 16:11:05 +0100248#define audit_inode(n,i,f) do { ; } while (0)
Chris Wright197c69c2005-05-11 10:54:05 +0100249#define audit_receive_filter(t,p,u,s,d,l) ({ -EOPNOTSUPP; })
David Woodhousebfb44962005-05-21 21:08:09 +0100250#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251#define audit_get_loginuid(c) ({ -1; })
252#define audit_ipc_perms(q,u,g,m) ({ 0; })
David Woodhouse3ec3b2f2005-05-17 12:08:48 +0100253#define audit_socketcall(n,a) ({ 0; })
254#define audit_sockaddr(len, addr) ({ 0; })
Stephen Smalley01116102005-05-21 00:15:52 +0100255#define audit_avc_path(dentry, mnt) ({ 0; })
Steve Grubbc2f0c7c2005-05-06 12:38:39 +0100256#define audit_signal_info(s,t) do { ; } while (0)
David Woodhouse5bb289b2005-06-24 14:14:05 +0100257#define audit_filter_user(cb,t) ({ 1; })
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258#endif
259
260#ifdef CONFIG_AUDIT
261/* These are defined in audit.c */
262 /* Public API */
Al Viro9796fdd2005-10-21 03:22:03 -0400263extern void audit_log(struct audit_context *ctx, gfp_t gfp_mask,
David Woodhouse9ad9ad32005-06-22 15:04:33 +0100264 int type, const char *fmt, ...)
265 __attribute__((format(printf,4,5)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
Al Viro9796fdd2005-10-21 03:22:03 -0400267extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268extern void audit_log_format(struct audit_buffer *ab,
269 const char *fmt, ...)
270 __attribute__((format(printf,2,3)));
271extern void audit_log_end(struct audit_buffer *ab);
83c7d092005-04-29 15:54:44 +0100272extern void audit_log_hex(struct audit_buffer *ab,
273 const unsigned char *buf,
274 size_t len);
275extern void audit_log_untrustedstring(struct audit_buffer *ab,
276 const char *string);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277extern void audit_log_d_path(struct audit_buffer *ab,
278 const char *prefix,
279 struct dentry *dentry,
280 struct vfsmount *vfsmnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 /* Private API (for auditsc.c only) */
282extern void audit_send_reply(int pid, int seq, int type,
283 int done, int multi,
284 void *payload, int size);
285extern void audit_log_lost(const char *message);
David Woodhousef6a789d2005-06-21 16:22:01 +0100286extern struct semaphore audit_netlink_sem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287#else
David Woodhouse7b430432005-07-02 13:50:40 +0100288#define audit_log(c,g,t,f,...) do { ; } while (0)
Badari Pulavarty13774022005-07-02 13:49:07 +0100289#define audit_log_start(c,g,t) ({ NULL; })
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290#define audit_log_vformat(b,f,a) do { ; } while (0)
291#define audit_log_format(b,f,...) do { ; } while (0)
292#define audit_log_end(b) do { ; } while (0)
83c7d092005-04-29 15:54:44 +0100293#define audit_log_hex(a,b,l) do { ; } while (0)
294#define audit_log_untrustedstring(a,s) do { ; } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295#define audit_log_d_path(b,p,d,v) do { ; } while (0)
296#endif
297#endif
298#endif