2 * Auditing VFS module for samba. Log selected file operations to syslog
5 * Copyright (C) Tim Potter, 1999-2000
6 * Copyright (C) Alexander Bokovoy, 2002
7 * Copyright (C) John H Terpstra, 2003
8 * Copyright (C) Stefan (metze) Metzmacher, 2003
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
26 #include "system/filesys.h"
27 #include "system/syslog.h"
28 #include "smbd/smbd.h"
29 #include "lib/param/loadparm.h"
31 static int vfs_extd_audit_debug_level = DBGC_VFS;
34 #define DBGC_CLASS vfs_extd_audit_debug_level
36 static int audit_syslog_facility(vfs_handle_struct *handle)
38 static const struct enum_list enum_log_facilities[] = {
43 { LOG_AUTHPRIV, "AUTHPRIV" },
46 { LOG_AUDIT, "AUDIT" },
49 { LOG_CONSOLE, "CONSOLE" },
55 { LOG_DAEMON, "DAEMON" },
61 { LOG_INSTALL, "INSTALL" },
67 { LOG_LAUNCHD, "LAUNCHD" },
79 { LOG_MEGASAFE, "MEGASAFE" },
82 { LOG_NETINFO, "NETINFO" },
87 #ifdef LOG_NFACILITIES
88 { LOG_NFACILITIES, "NFACILITIES" },
97 { LOG_REMOTEAUTH, "REMOTEAUTH" },
100 { LOG_SECURITY, "SECURITY" },
103 { LOG_SYSLOG, "SYSLOG" },
106 { LOG_USER, "USER" },
109 { LOG_UUCP, "UUCP" },
111 { LOG_LOCAL0, "LOCAL0" },
112 { LOG_LOCAL1, "LOCAL1" },
113 { LOG_LOCAL2, "LOCAL2" },
114 { LOG_LOCAL3, "LOCAL3" },
115 { LOG_LOCAL4, "LOCAL4" },
116 { LOG_LOCAL5, "LOCAL5" },
117 { LOG_LOCAL6, "LOCAL6" },
118 { LOG_LOCAL7, "LOCAL7" },
124 facility = lp_parm_enum(SNUM(handle->conn), "extd_audit", "facility", enum_log_facilities, LOG_USER);
130 static int audit_syslog_priority(vfs_handle_struct *handle)
132 static const struct enum_list enum_log_priorities[] = {
133 { LOG_EMERG, "EMERG" },
134 { LOG_ALERT, "ALERT" },
135 { LOG_CRIT, "CRIT" },
137 { LOG_WARNING, "WARNING" },
138 { LOG_NOTICE, "NOTICE" },
139 { LOG_INFO, "INFO" },
140 { LOG_DEBUG, "DEBUG" },
146 priority = lp_parm_enum(SNUM(handle->conn), "extd_audit", "priority",
147 enum_log_priorities, LOG_NOTICE);
148 if (priority == -1) {
149 priority = LOG_WARNING;
155 /* Implementation of vfs_ops. Pass everything on to the default
156 operation but log event first. */
158 static int audit_connect(vfs_handle_struct *handle, const char *svc, const char *user)
160 int result = SMB_VFS_NEXT_CONNECT(handle, svc, user);
166 openlog("smbd_audit", LOG_PID, audit_syslog_facility(handle));
168 if (lp_syslog() > 0) {
169 syslog(audit_syslog_priority(handle),
170 "connect to service %s by user %s\n",
173 DEBUG(10, ("Connected to service %s as user %s\n",
179 static void audit_disconnect(vfs_handle_struct *handle)
181 if (lp_syslog() > 0) {
182 syslog(audit_syslog_priority(handle), "disconnected\n");
184 DEBUG(10, ("Disconnected from VFS module extd_audit\n"));
185 SMB_VFS_NEXT_DISCONNECT(handle);
190 static int audit_mkdirat(vfs_handle_struct *handle,
191 struct files_struct *dirfsp,
192 const struct smb_filename *smb_fname,
195 struct smb_filename *full_fname = NULL;
198 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
201 if (full_fname == NULL) {
206 result = SMB_VFS_NEXT_MKDIRAT(handle,
211 if (lp_syslog() > 0) {
212 syslog(audit_syslog_priority(handle), "mkdirat %s %s%s\n",
213 full_fname->base_name,
214 (result < 0) ? "failed: " : "",
215 (result < 0) ? strerror(errno) : "");
217 DEBUG(0, ("vfs_extd_audit: mkdirat %s %s %s\n",
218 full_fname->base_name,
219 (result < 0) ? "failed: " : "",
220 (result < 0) ? strerror(errno) : ""));
222 TALLOC_FREE(full_fname);
226 static int audit_openat(vfs_handle_struct *handle,
227 const struct files_struct *dirfsp,
228 const struct smb_filename *smb_fname,
230 const struct vfs_open_how *how)
234 ret = SMB_VFS_NEXT_OPENAT(handle, dirfsp, smb_fname, fsp, how);
236 if (lp_syslog() > 0) {
237 syslog(audit_syslog_priority(handle),
238 "openat %s/%s (fd %d) %s%s%s\n",
239 smb_fname_str_dbg(fsp->fsp_name),
240 smb_fname->base_name,
242 ((how->flags & O_WRONLY) || (how->flags & O_RDWR)) ?
244 (ret < 0) ? "failed: " : "",
245 (ret < 0) ? strerror(errno) : "");
247 DEBUG(2, ("vfs_extd_audit: open %s/%s %s %s\n",
248 smb_fname_str_dbg(fsp->fsp_name),
249 smb_fname_str_dbg(smb_fname),
250 (ret < 0) ? "failed: " : "",
251 (ret < 0) ? strerror(errno) : ""));
256 static int audit_close(vfs_handle_struct *handle, files_struct *fsp)
260 result = SMB_VFS_NEXT_CLOSE(handle, fsp);
262 if (lp_syslog() > 0) {
263 syslog(audit_syslog_priority(handle), "close fd %d %s%s\n",
264 fsp_get_pathref_fd(fsp),
265 (result < 0) ? "failed: " : "",
266 (result < 0) ? strerror(errno) : "");
268 DEBUG(2, ("vfs_extd_audit: close fd %d %s %s\n",
269 fsp_get_pathref_fd(fsp),
270 (result < 0) ? "failed: " : "",
271 (result < 0) ? strerror(errno) : ""));
276 static int audit_renameat(vfs_handle_struct *handle,
277 files_struct *srcfsp,
278 const struct smb_filename *smb_fname_src,
279 files_struct *dstfsp,
280 const struct smb_filename *smb_fname_dst)
282 struct smb_filename *full_fname_src = NULL;
283 struct smb_filename *full_fname_dst = NULL;
287 full_fname_src = full_path_from_dirfsp_atname(talloc_tos(),
290 if (full_fname_src == NULL) {
295 full_fname_dst = full_path_from_dirfsp_atname(talloc_tos(),
298 if (full_fname_dst == NULL) {
299 TALLOC_FREE(full_fname_src);
304 result = SMB_VFS_NEXT_RENAMEAT(handle,
312 if (lp_syslog() > 0) {
313 syslog(audit_syslog_priority(handle), "renameat %s -> %s %s%s\n",
314 full_fname_src->base_name,
315 full_fname_dst->base_name,
316 (result < 0) ? "failed: " : "",
317 (result < 0) ? strerror(saved_errno) : "");
319 DEBUG(1, ("vfs_extd_audit: renameat old: %s newname: %s %s %s\n",
320 smb_fname_str_dbg(full_fname_src),
321 smb_fname_str_dbg(full_fname_dst),
322 (result < 0) ? "failed: " : "",
323 (result < 0) ? strerror(saved_errno) : ""));
325 TALLOC_FREE(full_fname_src);
326 TALLOC_FREE(full_fname_dst);
334 static int audit_unlinkat(vfs_handle_struct *handle,
335 struct files_struct *dirfsp,
336 const struct smb_filename *smb_fname,
339 struct smb_filename *full_fname = NULL;
342 full_fname = full_path_from_dirfsp_atname(talloc_tos(),
345 if (full_fname == NULL) {
349 result = SMB_VFS_NEXT_UNLINKAT(handle,
354 if (lp_syslog() > 0) {
355 syslog(audit_syslog_priority(handle), "unlinkat %s %s%s\n",
356 full_fname->base_name,
357 (result < 0) ? "failed: " : "",
358 (result < 0) ? strerror(errno) : "");
360 DBG_ERR("unlinkat %s %s %s\n",
361 smb_fname_str_dbg(full_fname),
362 (result < 0) ? "failed: " : "",
363 (result < 0) ? strerror(errno) : "");
365 TALLOC_FREE(full_fname);
369 static int audit_fchmod(vfs_handle_struct *handle, files_struct *fsp, mode_t mode)
373 result = SMB_VFS_NEXT_FCHMOD(handle, fsp, mode);
375 if (lp_syslog() > 0) {
376 syslog(audit_syslog_priority(handle), "fchmod %s mode 0x%x %s%s\n",
377 fsp->fsp_name->base_name, mode,
378 (result < 0) ? "failed: " : "",
379 (result < 0) ? strerror(errno) : "");
381 DEBUG(1, ("vfs_extd_audit: fchmod %s mode 0x%x %s %s\n",
382 fsp_str_dbg(fsp), (unsigned int)mode,
383 (result < 0) ? "failed: " : "",
384 (result < 0) ? strerror(errno) : ""));
389 static struct vfs_fn_pointers vfs_extd_audit_fns = {
390 .connect_fn = audit_connect,
391 .disconnect_fn = audit_disconnect,
392 .mkdirat_fn = audit_mkdirat,
393 .openat_fn = audit_openat,
394 .close_fn = audit_close,
395 .renameat_fn = audit_renameat,
396 .unlinkat_fn = audit_unlinkat,
397 .fchmod_fn = audit_fchmod,
401 NTSTATUS vfs_extd_audit_init(TALLOC_CTX *ctx)
403 NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
404 "extd_audit", &vfs_extd_audit_fns);
406 if (!NT_STATUS_IS_OK(ret))
409 vfs_extd_audit_debug_level = debug_add_class("extd_audit");
410 if (vfs_extd_audit_debug_level == -1) {
411 vfs_extd_audit_debug_level = DBGC_VFS;
412 DEBUG(0, ("vfs_extd_audit: Couldn't register custom debugging class!\n"));
414 DEBUG(10, ("vfs_extd_audit: Debug class number of 'extd_audit': %d\n", vfs_extd_audit_debug_level));