source: branches/samba-3.2.x/source/modules/vfs_audit.c

Last change on this file was 136, checked in by Paul Smedley, 17 years ago

Update trunk to 3.2.0rc1
File size: 9.1 KB
Line 
1/*
2 * Auditing VFS module for samba. Log selected file operations to syslog
3 * facility.
4 *
5 * Copyright (C) Tim Potter 1999-2000
6 * Copyright (C) Alexander Bokovoy 2002
7 * Copyright (C) Stefan (metze) Metzmacher 2002
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 */
22
23
24#include "includes.h"
25
26#undef DBGC_CLASS
27#define DBGC_CLASS DBGC_VFS
28
29/* Function prototypes */
30
31static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user);
32static void audit_disconnect(vfs_handle_struct *handle);
33static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr);
34static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode);
35static int audit_rmdir(vfs_handle_struct *handle, const char *path);
36static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
37static int audit_close(vfs_handle_struct *handle, files_struct *fsp);
38static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname);
39static int audit_unlink(vfs_handle_struct *handle, const char *path);
40static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode);
41static int audit_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode);
42static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode);
43static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode);
44
45/* VFS operations */
46
47static vfs_op_tuple audit_op_tuples[] = {
48
49 /* Disk operations */
50
51 {SMB_VFS_OP(audit_connect), SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_LOGGER},
52 {SMB_VFS_OP(audit_disconnect), SMB_VFS_OP_DISCONNECT, SMB_VFS_LAYER_LOGGER},
53
54 /* Directory operations */
55
56 {SMB_VFS_OP(audit_opendir), SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_LOGGER},
57 {SMB_VFS_OP(audit_mkdir), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_LOGGER},
58 {SMB_VFS_OP(audit_rmdir), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_LOGGER},
59
60 /* File operations */
61
62 {SMB_VFS_OP(audit_open), SMB_VFS_OP_OPEN, SMB_VFS_LAYER_LOGGER},
63 {SMB_VFS_OP(audit_close), SMB_VFS_OP_CLOSE, SMB_VFS_LAYER_LOGGER},
64 {SMB_VFS_OP(audit_rename), SMB_VFS_OP_RENAME, SMB_VFS_LAYER_LOGGER},
65 {SMB_VFS_OP(audit_unlink), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_LOGGER},
66 {SMB_VFS_OP(audit_chmod), SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_LOGGER},
67 {SMB_VFS_OP(audit_fchmod), SMB_VFS_OP_FCHMOD, SMB_VFS_LAYER_LOGGER},
68 {SMB_VFS_OP(audit_chmod_acl), SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_LOGGER},
69 {SMB_VFS_OP(audit_fchmod_acl), SMB_VFS_OP_FCHMOD_ACL, SMB_VFS_LAYER_LOGGER},
70
71 /* Finish VFS operations definition */
72
73 {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
74};
75
76
77static int audit_syslog_facility(vfs_handle_struct *handle)
78{
79 static const struct enum_list enum_log_facilities[] = {
80 { LOG_USER, "USER" },
81 { LOG_LOCAL0, "LOCAL0" },
82 { LOG_LOCAL1, "LOCAL1" },
83 { LOG_LOCAL2, "LOCAL2" },
84 { LOG_LOCAL3, "LOCAL3" },
85 { LOG_LOCAL4, "LOCAL4" },
86 { LOG_LOCAL5, "LOCAL5" },
87 { LOG_LOCAL6, "LOCAL6" },
88 { LOG_LOCAL7, "LOCAL7" }
89 };
90
91 int facility;
92
93 facility = lp_parm_enum(SNUM(handle->conn), "audit", "facility", enum_log_facilities, LOG_USER);
94
95 return facility;
96}
97
98
99static int audit_syslog_priority(vfs_handle_struct *handle)
100{
101 static const struct enum_list enum_log_priorities[] = {
102 { LOG_EMERG, "EMERG" },
103 { LOG_ALERT, "ALERT" },
104 { LOG_CRIT, "CRIT" },
105 { LOG_ERR, "ERR" },
106 { LOG_WARNING, "WARNING" },
107 { LOG_NOTICE, "NOTICE" },
108 { LOG_INFO, "INFO" },
109 { LOG_DEBUG, "DEBUG" }
110 };
111
112 int priority;
113
114 priority = lp_parm_enum(SNUM(handle->conn), "audit", "priority",
115 enum_log_priorities, LOG_NOTICE);
116 if (priority == -1) {
117 priority = LOG_WARNING;
118 }
119
120 return priority;
121}
122
123/* Implementation of vfs_ops. Pass everything on to the default
124 operation but log event first. */
125
126static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
127{
128 int result;
129
130 openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
131
132 syslog(audit_syslog_priority(handle), "connect to service %s by user %s\n",
133 svc, user);
134
135 result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
136
137 return result;
138}
139
140static void audit_disconnect(vfs_handle_struct *handle)
141{
142 syslog(audit_syslog_priority(handle), "disconnected\n");
143 SMB_VFS_NEXT_DISCONNECT(handle);
144
145 return;
146}
147
148static SMB_STRUCT_DIR *audit_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
149{
150 SMB_STRUCT_DIR *result;
151
152 result = SMB_VFS_NEXT_OPENDIR(handle, fname, mask, attr);
153
154 syslog(audit_syslog_priority(handle), "opendir %s %s%s\n",
155 fname,
156 (result == NULL) ? "failed: " : "",
157 (result == NULL) ? strerror(errno) : "");
158
159 return result;
160}
161
162static int audit_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
163{
164 int result;
165
166 result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
167
168 syslog(audit_syslog_priority(handle), "mkdir %s %s%s\n",
169 path,
170 (result < 0) ? "failed: " : "",
171 (result < 0) ? strerror(errno) : "");
172
173 return result;
174}
175
176static int audit_rmdir(vfs_handle_struct *handle, const char *path)
177{
178 int result;
179
180 result = SMB_VFS_NEXT_RMDIR(handle, path);
181
182 syslog(audit_syslog_priority(handle), "rmdir %s %s%s\n",
183 path,
184 (result < 0) ? "failed: " : "",
185 (result < 0) ? strerror(errno) : "");
186
187 return result;
188}
189
190static int audit_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
191{
192 int result;
193
194 result = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
195
196 syslog(audit_syslog_priority(handle), "open %s (fd %d) %s%s%s\n",
197 fname, result,
198 ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
199 (result < 0) ? "failed: " : "",
200 (result < 0) ? strerror(errno) : "");
201
202 return result;
203}
204
205static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
206{
207 int result;
208
209 result = SMB_VFS_NEXT_CLOSE(handle, fsp);
210
211 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
212 fsp->fh->fd,
213 (result < 0) ? "failed: " : "",
214 (result < 0) ? strerror(errno) : "");
215
216 return result;
217}
218
219static int audit_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
220{
221 int result;
222
223 result = SMB_VFS_NEXT_RENAME(handle, oldname, newname);
224
225 syslog(audit_syslog_priority(handle), "rename %s -> %s %s%s\n",
226 oldname, newname,
227 (result < 0) ? "failed: " : "",
228 (result < 0) ? strerror(errno) : "");
229
230 return result;
231}
232
233static int audit_unlink(vfs_handle_struct *handle, const char *path)
234{
235 int result;
236
237 result = SMB_VFS_NEXT_UNLINK(handle, path);
238
239 syslog(audit_syslog_priority(handle), "unlink %s %s%s\n",
240 path,
241 (result < 0) ? "failed: " : "",
242 (result < 0) ? strerror(errno) : "");
243
244 return result;
245}
246
247static int audit_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
248{
249 int result;
250
251 result = SMB_VFS_NEXT_CHMOD(handle, path, mode);
252
253 syslog(audit_syslog_priority(handle), "chmod %s mode 0x%x %s%s\n",
254 path, mode,
255 (result < 0) ? "failed: " : "",
256 (result < 0) ? strerror(errno) : "");
257
258 return result;
259}
260
261static int audit_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
262{
263 int result;
264
265 result = SMB_VFS_NEXT_CHMOD_ACL(handle, path, mode);
266
267 syslog(audit_syslog_priority(handle), "chmod_acl %s mode 0x%x %s%s\n",
268 path, mode,
269 (result < 0) ? "failed: " : "",
270 (result < 0) ? strerror(errno) : "");
271
272 return result;
273}
274
275static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
276{
277 int result;
278
279 result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
280
281 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
282 fsp->fsp_name, mode,
283 (result < 0) ? "failed: " : "",
284 (result < 0) ? strerror(errno) : "");
285
286 return result;
287}
288
289static int audit_fchmod_acl(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
290{
291 int result;
292
293 result = SMB_VFS_NEXT_FCHMOD_ACL(handle, fsp, mode);
294
295 syslog(audit_syslog_priority(handle), "fchmod_acl %s mode 0x%x %s%s\n",
296 fsp->fsp_name, mode,
297 (result < 0) ? "failed: " : "",
298 (result < 0) ? strerror(errno) : "");
299
300 return result;
301}
302
303NTSTATUS vfs_audit_init(void);
304NTSTATUS vfs_audit_init(void)
305{
306 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "audit", audit_op_tuples);
307}
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