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
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
41 #ifndef SYSLOG_FACILITY
42 #define SYSLOG_FACILITY LOG_USER
45 #ifndef SYSLOG_PRIORITY
46 #define SYSLOG_PRIORITY LOG_NOTICE
49 /* Function prototypes */
51 static int audit_connect(struct connection_struct *conn, const char *svc, const char *user);
52 static void audit_disconnect(struct connection_struct *conn);
53 static DIR *audit_opendir(struct connection_struct *conn, const char *fname);
54 static int audit_mkdir(struct connection_struct *conn, const char *path, mode_t mode);
55 static int audit_rmdir(struct connection_struct *conn, const char *path);
56 static int audit_open(struct connection_struct *conn, const char *fname, int flags, mode_t mode);
57 static int audit_close(struct files_struct *fsp, int fd);
58 static int audit_rename(struct connection_struct *conn, const char *old, const char *new);
59 static int audit_unlink(struct connection_struct *conn, const char *path);
60 static int audit_chmod(struct connection_struct *conn, const char *path, mode_t mode);
61 static int audit_chmod_acl(struct connection_struct *conn, const char *name, mode_t mode);
62 static int audit_fchmod(struct files_struct *fsp, int fd, mode_t mode);
63 static int audit_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode);
67 static struct vfs_ops default_vfs_ops; /* For passthrough operation */
68 static struct smb_vfs_handle_struct *audit_handle;
70 static vfs_op_tuple audit_ops[] = {
74 {audit_connect, SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_LOGGER},
75 {audit_disconnect, SMB_VFS_OP_DISCONNECT, SMB_VFS_LAYER_LOGGER},
77 /* Directory operations */
79 {audit_opendir, SMB_VFS_OP_OPENDIR, SMB_VFS_LAYER_LOGGER},
80 {audit_mkdir, SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_LOGGER},
81 {audit_rmdir, SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_LOGGER},
85 {audit_open, SMB_VFS_OP_OPEN, SMB_VFS_LAYER_LOGGER},
86 {audit_close, SMB_VFS_OP_CLOSE, SMB_VFS_LAYER_LOGGER},
87 {audit_rename, SMB_VFS_OP_RENAME, SMB_VFS_LAYER_LOGGER},
88 {audit_unlink, SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_LOGGER},
89 {audit_chmod, SMB_VFS_OP_CHMOD, SMB_VFS_LAYER_LOGGER},
90 {audit_fchmod, SMB_VFS_OP_FCHMOD, SMB_VFS_LAYER_LOGGER},
91 {audit_chmod_acl, SMB_VFS_OP_CHMOD_ACL, SMB_VFS_LAYER_LOGGER},
92 {audit_fchmod_acl, SMB_VFS_OP_FCHMOD_ACL, SMB_VFS_LAYER_LOGGER},
94 /* Finish VFS operations definition */
96 {NULL, SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
99 /* VFS initialisation function. Return vfs_op_tuple array back to SAMBA. */
101 static vfs_op_tuple *audit_init(const struct vfs_ops *def_vfs_ops,
102 struct smb_vfs_handle_struct *vfs_handle)
104 memcpy(&default_vfs_ops, def_vfs_ops, sizeof(struct vfs_ops));
106 audit_handle = vfs_handle;
108 openlog("smbd_audit", LOG_PID, SYSLOG_FACILITY);
109 syslog(SYSLOG_PRIORITY, "VFS_INIT: vfs_ops loaded\n");
113 /* Implementation of vfs_ops. Pass everything on to the default
114 operation but log event first. */
116 static int audit_connect(struct connection_struct *conn, const char *svc, const char *user)
118 syslog(SYSLOG_PRIORITY, "connect to service %s by user %s\n",
121 return default_vfs_ops.connect(conn, svc, user);
124 static void audit_disconnect(struct connection_struct *conn)
126 syslog(SYSLOG_PRIORITY, "disconnected\n");
127 default_vfs_ops.disconnect(conn);
130 static DIR *audit_opendir(struct connection_struct *conn, const char *fname)
132 DIR *result = default_vfs_ops.opendir(conn, fname);
134 syslog(SYSLOG_PRIORITY, "opendir %s %s%s\n",
136 (result == NULL) ? "failed: " : "",
137 (result == NULL) ? strerror(errno) : "");
142 static int audit_mkdir(struct connection_struct *conn, const char *path, mode_t mode)
144 int result = default_vfs_ops.mkdir(conn, path, mode);
146 syslog(SYSLOG_PRIORITY, "mkdir %s %s%s\n",
148 (result < 0) ? "failed: " : "",
149 (result < 0) ? strerror(errno) : "");
154 static int audit_rmdir(struct connection_struct *conn, const char *path)
156 int result = default_vfs_ops.rmdir(conn, path);
158 syslog(SYSLOG_PRIORITY, "rmdir %s %s%s\n",
160 (result < 0) ? "failed: " : "",
161 (result < 0) ? strerror(errno) : "");
166 static int audit_open(struct connection_struct *conn, const char *fname, int flags, mode_t mode)
168 int result = default_vfs_ops.open(conn, fname, flags, mode);
170 syslog(SYSLOG_PRIORITY, "open %s (fd %d) %s%s%s\n",
172 ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
173 (result < 0) ? "failed: " : "",
174 (result < 0) ? strerror(errno) : "");
179 static int audit_close(struct files_struct *fsp, int fd)
181 int result = default_vfs_ops.close(fsp, fd);
183 syslog(SYSLOG_PRIORITY, "close fd %d %s%s\n",
185 (result < 0) ? "failed: " : "",
186 (result < 0) ? strerror(errno) : "");
191 static int audit_rename(struct connection_struct *conn, const char *old, const char *new)
193 int result = default_vfs_ops.rename(conn, old, new);
195 syslog(SYSLOG_PRIORITY, "rename %s -> %s %s%s\n",
197 (result < 0) ? "failed: " : "",
198 (result < 0) ? strerror(errno) : "");
203 static int audit_unlink(struct connection_struct *conn, const char *path)
205 int result = default_vfs_ops.unlink(conn, path);
207 syslog(SYSLOG_PRIORITY, "unlink %s %s%s\n",
209 (result < 0) ? "failed: " : "",
210 (result < 0) ? strerror(errno) : "");
215 static int audit_chmod(struct connection_struct *conn, const char *path, mode_t mode)
217 int result = default_vfs_ops.chmod(conn, path, mode);
219 syslog(SYSLOG_PRIORITY, "chmod %s mode 0x%x %s%s\n",
221 (result < 0) ? "failed: " : "",
222 (result < 0) ? strerror(errno) : "");
227 static int audit_chmod_acl(struct connection_struct *conn, const char *path, mode_t mode)
231 if ( !default_vfs_ops.chmod_acl )
234 result = default_vfs_ops.chmod_acl(conn, path, mode);
236 syslog(SYSLOG_PRIORITY, "chmod_acl %s mode 0x%x %s%s\n",
238 (result < 0) ? "failed: " : "",
239 (result < 0) ? strerror(errno) : "");
244 static int audit_fchmod(struct files_struct *fsp, int fd, mode_t mode)
246 int result = default_vfs_ops.fchmod(fsp, fd, mode);
248 syslog(SYSLOG_PRIORITY, "fchmod %s mode 0x%x %s%s\n",
250 (result < 0) ? "failed: " : "",
251 (result < 0) ? strerror(errno) : "");
256 static int audit_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode)
260 if ( !default_vfs_ops.fchmod_acl )
263 result = default_vfs_ops.fchmod_acl(fsp, fd, mode);
265 syslog(SYSLOG_PRIORITY, "fchmod_acl %s mode 0x%x %s%s\n",
267 (result < 0) ? "failed: " : "",
268 (result < 0) ? strerror(errno) : "");
273 int vfs_audit_init(void)
275 return smb_register_vfs("audit", audit_init, SMB_VFS_INTERFACE_VERSION);