2 * Store Windows ACLs in a tdb.
4 * Copyright (C) Volker Lendecke, 2008
5 * Copyright (C) Jeremy Allison, 2008
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 /* NOTE: This is an experimental module, not yet finished. JRA. */
24 #include "smbd/smbd.h"
25 #include "system/filesys.h"
26 #include "librpc/gen_ndr/xattr.h"
27 #include "librpc/gen_ndr/ndr_xattr.h"
28 #include "../lib/crypto/crypto.h"
33 #define DBGC_CLASS DBGC_VFS
35 #define ACL_MODULE_NAME "acl_tdb"
36 #include "modules/vfs_acl_common.c"
38 static unsigned int ref_count
;
39 static struct db_context
*acl_db
;
41 /*******************************************************************
42 Open acl_db if not already open, increment ref count.
43 *******************************************************************/
45 static bool acl_tdb_init(void)
54 dbname
= state_path("file_ntacls.tdb");
62 acl_db
= db_open(NULL
, dbname
, 0, TDB_DEFAULT
, O_RDWR
|O_CREAT
, 0600);
80 /*******************************************************************
81 Lower ref count and close acl_db if zero.
82 *******************************************************************/
84 static void disconnect_acl_tdb(struct vfs_handle_struct
*handle
)
86 SMB_VFS_NEXT_DISCONNECT(handle
);
93 /*******************************************************************
94 Fetch_lock the tdb acl record for a file
95 *******************************************************************/
97 static struct db_record
*acl_tdb_lock(TALLOC_CTX
*mem_ctx
,
98 struct db_context
*db
,
99 const struct file_id
*id
)
103 /* For backwards compatibility only store the dev/inode. */
104 push_file_id_16((char *)id_buf
, id
);
105 return db
->fetch_locked(db
,
107 make_tdb_data(id_buf
,
111 /*******************************************************************
112 Delete the tdb acl record for a file
113 *******************************************************************/
115 static NTSTATUS
acl_tdb_delete(vfs_handle_struct
*handle
,
116 struct db_context
*db
,
117 SMB_STRUCT_STAT
*psbuf
)
120 struct file_id id
= vfs_file_id_from_sbuf(handle
->conn
, psbuf
);
121 struct db_record
*rec
= acl_tdb_lock(talloc_tos(), db
, &id
);
124 * If rec == NULL there's not much we can do about it
128 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
133 status
= rec
->delete_rec(rec
);
138 /*******************************************************************
139 Pull a security descriptor into a DATA_BLOB from a tdb store.
140 *******************************************************************/
142 static NTSTATUS
get_acl_blob(TALLOC_CTX
*ctx
,
143 vfs_handle_struct
*handle
,
151 struct db_context
*db
= acl_db
;
152 NTSTATUS status
= NT_STATUS_OK
;
153 SMB_STRUCT_STAT sbuf
;
158 status
= vfs_stat_fsp(fsp
);
159 sbuf
= fsp
->fsp_name
->st
;
161 int ret
= vfs_stat_smb_fname(handle
->conn
, name
, &sbuf
);
163 status
= map_nt_error_from_unix(errno
);
167 if (!NT_STATUS_IS_OK(status
)) {
171 id
= vfs_file_id_from_sbuf(handle
->conn
, &sbuf
);
173 /* For backwards compatibility only store the dev/inode. */
174 push_file_id_16((char *)id_buf
, &id
);
178 make_tdb_data(id_buf
, sizeof(id_buf
)),
180 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
183 pblob
->data
= data
.dptr
;
184 pblob
->length
= data
.dsize
;
186 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
187 (unsigned int)data
.dsize
, name
));
189 if (pblob
->length
== 0 || pblob
->data
== NULL
) {
190 return NT_STATUS_NOT_FOUND
;
195 /*******************************************************************
196 Store a DATA_BLOB into a tdb record given an fsp pointer.
197 *******************************************************************/
199 static NTSTATUS
store_acl_blob_fsp(vfs_handle_struct
*handle
,
206 struct db_context
*db
= acl_db
;
207 struct db_record
*rec
;
210 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
211 (unsigned int)pblob
->length
, fsp_str_dbg(fsp
)));
213 status
= vfs_stat_fsp(fsp
);
214 if (!NT_STATUS_IS_OK(status
)) {
218 id
= vfs_file_id_from_sbuf(handle
->conn
, &fsp
->fsp_name
->st
);
220 /* For backwards compatibility only store the dev/inode. */
221 push_file_id_16((char *)id_buf
, &id
);
222 rec
= db
->fetch_locked(db
, talloc_tos(),
223 make_tdb_data(id_buf
,
226 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
227 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
229 data
.dptr
= pblob
->data
;
230 data
.dsize
= pblob
->length
;
231 return rec
->store(rec
, data
, 0);
234 /*********************************************************************
235 On unlink we need to delete the tdb record (if using tdb).
236 *********************************************************************/
238 static int unlink_acl_tdb(vfs_handle_struct
*handle
,
239 const struct smb_filename
*smb_fname
)
241 struct smb_filename
*smb_fname_tmp
= NULL
;
242 struct db_context
*db
= acl_db
;
246 status
= copy_smb_filename(talloc_tos(), smb_fname
, &smb_fname_tmp
);
247 if (!NT_STATUS_IS_OK(status
)) {
248 errno
= map_errno_from_nt_status(status
);
252 if (lp_posix_pathnames()) {
253 ret
= SMB_VFS_LSTAT(handle
->conn
, smb_fname_tmp
);
255 ret
= SMB_VFS_STAT(handle
->conn
, smb_fname_tmp
);
262 ret
= unlink_acl_common(handle
, smb_fname_tmp
);
268 acl_tdb_delete(handle
, db
, &smb_fname_tmp
->st
);
273 /*********************************************************************
274 On rmdir we need to delete the tdb record (if using tdb).
275 *********************************************************************/
277 static int rmdir_acl_tdb(vfs_handle_struct
*handle
, const char *path
)
280 SMB_STRUCT_STAT sbuf
;
281 struct db_context
*db
= acl_db
;
284 if (lp_posix_pathnames()) {
285 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
287 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
294 ret
= rmdir_acl_common(handle
, path
);
299 acl_tdb_delete(handle
, db
, &sbuf
);
303 /*******************************************************************
304 Handle opening the storage tdb if so configured.
305 *******************************************************************/
307 static int connect_acl_tdb(struct vfs_handle_struct
*handle
,
311 int ret
= SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
317 if (!acl_tdb_init()) {
318 SMB_VFS_NEXT_DISCONNECT(handle
);
322 /* Ensure we have the parameters correct if we're
323 * using this module. */
324 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
325 "'dos filemode = true' and "
326 "'force unknown acl user = true' for service %s\n",
329 lp_do_parameter(SNUM(handle
->conn
), "inherit acls", "true");
330 lp_do_parameter(SNUM(handle
->conn
), "dos filemode", "true");
331 lp_do_parameter(SNUM(handle
->conn
), "force unknown acl user", "true");
336 /*********************************************************************
337 Remove a Windows ACL - we're setting the underlying POSIX ACL.
338 *********************************************************************/
340 static int sys_acl_set_file_tdb(vfs_handle_struct
*handle
,
345 SMB_STRUCT_STAT sbuf
;
346 struct db_context
*db
= acl_db
;
349 if (lp_posix_pathnames()) {
350 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
352 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
359 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle
,
367 acl_tdb_delete(handle
, db
, &sbuf
);
371 /*********************************************************************
372 Remove a Windows ACL - we're setting the underlying POSIX ACL.
373 *********************************************************************/
375 static int sys_acl_set_fd_tdb(vfs_handle_struct
*handle
,
379 struct db_context
*db
= acl_db
;
383 status
= vfs_stat_fsp(fsp
);
384 if (!NT_STATUS_IS_OK(status
)) {
388 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FD(handle
,
395 acl_tdb_delete(handle
, db
, &fsp
->fsp_name
->st
);
399 static struct vfs_fn_pointers vfs_acl_tdb_fns
= {
400 .connect_fn
= connect_acl_tdb
,
401 .disconnect
= disconnect_acl_tdb
,
402 .opendir
= opendir_acl_common
,
403 .mkdir
= mkdir_acl_common
,
404 .rmdir
= rmdir_acl_tdb
,
405 .open_fn
= open_acl_common
,
406 .create_file
= create_file_acl_common
,
407 .unlink
= unlink_acl_tdb
,
408 .chmod
= chmod_acl_module_common
,
409 .fchmod
= fchmod_acl_module_common
,
410 .fget_nt_acl
= fget_nt_acl_common
,
411 .get_nt_acl
= get_nt_acl_common
,
412 .fset_nt_acl
= fset_nt_acl_common
,
413 .chmod_acl
= chmod_acl_acl_module_common
,
414 .fchmod_acl
= fchmod_acl_acl_module_common
,
415 .sys_acl_set_file
= sys_acl_set_file_tdb
,
416 .sys_acl_set_fd
= sys_acl_set_fd_tdb
419 NTSTATUS
vfs_acl_tdb_init(void)
421 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "acl_tdb",