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 tcon_context *conn, const char *svc, const char *user);
52 static void audit_disconnect(struct tcon_context *conn);
53 static DIR *audit_opendir(struct tcon_context *conn, const char *fname);
54 static int audit_mkdir(struct tcon_context *conn, const char *path, mode_t mode);
55 static int audit_rmdir(struct tcon_context *conn, const char *path);
56 static int audit_open(struct tcon_context *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 tcon_context *conn, const char *old, const char *new);
59 static int audit_unlink(struct tcon_context *conn, const char *path);
60 static int audit_chmod(struct tcon_context *conn, const char *path, mode_t mode);
61 static int audit_chmod_acl(struct tcon_context *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 vfs_op_tuple *vfs_init(int *vfs_version, struct vfs_ops *def_vfs_ops,
102 struct smb_vfs_handle_struct *vfs_handle)
104 *vfs_version = SMB_VFS_INTERFACE_VERSION;
105 memcpy(&default_vfs_ops, def_vfs_ops, sizeof(struct vfs_ops));
107 audit_handle = vfs_handle;
109 openlog("smbd_audit", LOG_PID, SYSLOG_FACILITY);
110 syslog(SYSLOG_PRIORITY, "VFS_INIT: vfs_ops loaded\n");
114 /* VFS finalization function. */
115 void vfs_done(struct tcon_context *conn)
117 syslog(SYSLOG_PRIORITY, "VFS_DONE: vfs module unloaded\n");
120 /* Implementation of vfs_ops. Pass everything on to the default
121 operation but log event first. */
123 static int audit_connect(struct tcon_context *conn, const char *svc, const char *user)
125 syslog(SYSLOG_PRIORITY, "connect to service %s by user %s\n",
128 return default_vfs_ops.connect(conn, svc, user);
131 static void audit_disconnect(struct tcon_context *conn)
133 syslog(SYSLOG_PRIORITY, "disconnected\n");
134 default_vfs_ops.disconnect(conn);
137 static DIR *audit_opendir(struct tcon_context *conn, const char *fname)
139 DIR *result = default_vfs_ops.opendir(conn, fname);
141 syslog(SYSLOG_PRIORITY, "opendir %s %s%s\n",
143 (result == NULL) ? "failed: " : "",
144 (result == NULL) ? strerror(errno) : "");
149 static int audit_mkdir(struct tcon_context *conn, const char *path, mode_t mode)
151 int result = default_vfs_ops.mkdir(conn, path, mode);
153 syslog(SYSLOG_PRIORITY, "mkdir %s %s%s\n",
155 (result < 0) ? "failed: " : "",
156 (result < 0) ? strerror(errno) : "");
161 static int audit_rmdir(struct tcon_context *conn, const char *path)
163 int result = default_vfs_ops.rmdir(conn, path);
165 syslog(SYSLOG_PRIORITY, "rmdir %s %s%s\n",
167 (result < 0) ? "failed: " : "",
168 (result < 0) ? strerror(errno) : "");
173 static int audit_open(struct tcon_context *conn, const char *fname, int flags, mode_t mode)
175 int result = default_vfs_ops.open(conn, fname, flags, mode);
177 syslog(SYSLOG_PRIORITY, "open %s (fd %d) %s%s%s\n",
179 ((flags & O_WRONLY) || (flags & O_RDWR)) ? "for writing " : "",
180 (result < 0) ? "failed: " : "",
181 (result < 0) ? strerror(errno) : "");
186 static int audit_close(struct files_struct *fsp, int fd)
188 int result = default_vfs_ops.close(fsp, fd);
190 syslog(SYSLOG_PRIORITY, "close fd %d %s%s\n",
192 (result < 0) ? "failed: " : "",
193 (result < 0) ? strerror(errno) : "");
198 static int audit_rename(struct tcon_context *conn, const char *old, const char *new)
200 int result = default_vfs_ops.rename(conn, old, new);
202 syslog(SYSLOG_PRIORITY, "rename %s -> %s %s%s\n",
204 (result < 0) ? "failed: " : "",
205 (result < 0) ? strerror(errno) : "");
210 static int audit_unlink(struct tcon_context *conn, const char *path)
212 int result = default_vfs_ops.unlink(conn, path);
214 syslog(SYSLOG_PRIORITY, "unlink %s %s%s\n",
216 (result < 0) ? "failed: " : "",
217 (result < 0) ? strerror(errno) : "");
222 static int audit_chmod(struct tcon_context *conn, const char *path, mode_t mode)
224 int result = default_vfs_ops.chmod(conn, path, mode);
226 syslog(SYSLOG_PRIORITY, "chmod %s mode 0x%x %s%s\n",
228 (result < 0) ? "failed: " : "",
229 (result < 0) ? strerror(errno) : "");
234 static int audit_chmod_acl(struct tcon_context *conn, const char *path, mode_t mode)
238 if ( !default_vfs_ops.chmod_acl )
241 result = default_vfs_ops.chmod_acl(conn, path, mode);
243 syslog(SYSLOG_PRIORITY, "chmod_acl %s mode 0x%x %s%s\n",
245 (result < 0) ? "failed: " : "",
246 (result < 0) ? strerror(errno) : "");
251 static int audit_fchmod(struct files_struct *fsp, int fd, mode_t mode)
253 int result = default_vfs_ops.fchmod(fsp, fd, mode);
255 syslog(SYSLOG_PRIORITY, "fchmod %s mode 0x%x %s%s\n",
257 (result < 0) ? "failed: " : "",
258 (result < 0) ? strerror(errno) : "");
263 static int audit_fchmod_acl(struct files_struct *fsp, int fd, mode_t mode)
267 if ( !default_vfs_ops.fchmod_acl )
270 result = default_vfs_ops.fchmod_acl(fsp, fd, mode);
272 syslog(SYSLOG_PRIORITY, "fchmod_acl %s mode 0x%x %s%s\n",
274 (result < 0) ? "failed: " : "",
275 (result < 0) ? strerror(errno) : "");