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"
34 #define DBGC_CLASS DBGC_VFS
36 #define ACL_MODULE_NAME "acl_tdb"
37 #include "modules/vfs_acl_common.c"
39 static unsigned int ref_count
;
40 static struct db_context
*acl_db
;
42 /*******************************************************************
43 Open acl_db if not already open, increment ref count.
44 *******************************************************************/
46 static bool acl_tdb_init(void)
55 dbname
= state_path("file_ntacls.tdb");
63 acl_db
= db_open(NULL
, dbname
, 0, TDB_DEFAULT
, O_RDWR
|O_CREAT
, 0600);
81 /*******************************************************************
82 Lower ref count and close acl_db if zero.
83 *******************************************************************/
85 static void disconnect_acl_tdb(struct vfs_handle_struct
*handle
)
87 SMB_VFS_NEXT_DISCONNECT(handle
);
94 /*******************************************************************
95 Fetch_lock the tdb acl record for a file
96 *******************************************************************/
98 static struct db_record
*acl_tdb_lock(TALLOC_CTX
*mem_ctx
,
99 struct db_context
*db
,
100 const struct file_id
*id
)
104 /* For backwards compatibility only store the dev/inode. */
105 push_file_id_16((char *)id_buf
, id
);
106 return db
->fetch_locked(db
,
108 make_tdb_data(id_buf
,
112 /*******************************************************************
113 Delete the tdb acl record for a file
114 *******************************************************************/
116 static NTSTATUS
acl_tdb_delete(vfs_handle_struct
*handle
,
117 struct db_context
*db
,
118 SMB_STRUCT_STAT
*psbuf
)
121 struct file_id id
= vfs_file_id_from_sbuf(handle
->conn
, psbuf
);
122 struct db_record
*rec
= acl_tdb_lock(talloc_tos(), db
, &id
);
125 * If rec == NULL there's not much we can do about it
129 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
134 status
= rec
->delete_rec(rec
);
139 /*******************************************************************
140 Pull a security descriptor into a DATA_BLOB from a tdb store.
141 *******************************************************************/
143 static NTSTATUS
get_acl_blob(TALLOC_CTX
*ctx
,
144 vfs_handle_struct
*handle
,
152 struct db_context
*db
= acl_db
;
153 NTSTATUS status
= NT_STATUS_OK
;
154 SMB_STRUCT_STAT sbuf
;
159 status
= vfs_stat_fsp(fsp
);
160 sbuf
= fsp
->fsp_name
->st
;
162 int ret
= vfs_stat_smb_fname(handle
->conn
, name
, &sbuf
);
164 status
= map_nt_error_from_unix(errno
);
168 if (!NT_STATUS_IS_OK(status
)) {
172 id
= vfs_file_id_from_sbuf(handle
->conn
, &sbuf
);
174 /* For backwards compatibility only store the dev/inode. */
175 push_file_id_16((char *)id_buf
, &id
);
179 make_tdb_data(id_buf
, sizeof(id_buf
)),
181 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
184 pblob
->data
= data
.dptr
;
185 pblob
->length
= data
.dsize
;
187 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
188 (unsigned int)data
.dsize
, name
));
190 if (pblob
->length
== 0 || pblob
->data
== NULL
) {
191 return NT_STATUS_NOT_FOUND
;
196 /*******************************************************************
197 Store a DATA_BLOB into a tdb record given an fsp pointer.
198 *******************************************************************/
200 static NTSTATUS
store_acl_blob_fsp(vfs_handle_struct
*handle
,
207 struct db_context
*db
= acl_db
;
208 struct db_record
*rec
;
211 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
212 (unsigned int)pblob
->length
, fsp_str_dbg(fsp
)));
214 status
= vfs_stat_fsp(fsp
);
215 if (!NT_STATUS_IS_OK(status
)) {
219 id
= vfs_file_id_from_sbuf(handle
->conn
, &fsp
->fsp_name
->st
);
221 /* For backwards compatibility only store the dev/inode. */
222 push_file_id_16((char *)id_buf
, &id
);
223 rec
= db
->fetch_locked(db
, talloc_tos(),
224 make_tdb_data(id_buf
,
227 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
228 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
230 data
.dptr
= pblob
->data
;
231 data
.dsize
= pblob
->length
;
232 return rec
->store(rec
, data
, 0);
235 /*********************************************************************
236 On unlink we need to delete the tdb record (if using tdb).
237 *********************************************************************/
239 static int unlink_acl_tdb(vfs_handle_struct
*handle
,
240 const struct smb_filename
*smb_fname
)
242 struct smb_filename
*smb_fname_tmp
= NULL
;
243 struct db_context
*db
= acl_db
;
247 status
= copy_smb_filename(talloc_tos(), smb_fname
, &smb_fname_tmp
);
248 if (!NT_STATUS_IS_OK(status
)) {
249 errno
= map_errno_from_nt_status(status
);
253 if (lp_posix_pathnames()) {
254 ret
= SMB_VFS_LSTAT(handle
->conn
, smb_fname_tmp
);
256 ret
= SMB_VFS_STAT(handle
->conn
, smb_fname_tmp
);
263 ret
= unlink_acl_common(handle
, smb_fname_tmp
);
269 acl_tdb_delete(handle
, db
, &smb_fname_tmp
->st
);
274 /*********************************************************************
275 On rmdir we need to delete the tdb record (if using tdb).
276 *********************************************************************/
278 static int rmdir_acl_tdb(vfs_handle_struct
*handle
, const char *path
)
281 SMB_STRUCT_STAT sbuf
;
282 struct db_context
*db
= acl_db
;
285 if (lp_posix_pathnames()) {
286 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
288 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
295 ret
= rmdir_acl_common(handle
, path
);
300 acl_tdb_delete(handle
, db
, &sbuf
);
304 /*******************************************************************
305 Handle opening the storage tdb if so configured.
306 *******************************************************************/
308 static int connect_acl_tdb(struct vfs_handle_struct
*handle
,
312 int ret
= SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
318 if (!acl_tdb_init()) {
319 SMB_VFS_NEXT_DISCONNECT(handle
);
323 /* Ensure we have the parameters correct if we're
324 * using this module. */
325 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
326 "'dos filemode = true' and "
327 "'force unknown acl user = true' for service %s\n",
330 lp_do_parameter(SNUM(handle
->conn
), "inherit acls", "true");
331 lp_do_parameter(SNUM(handle
->conn
), "dos filemode", "true");
332 lp_do_parameter(SNUM(handle
->conn
), "force unknown acl user", "true");
337 /*********************************************************************
338 Remove a Windows ACL - we're setting the underlying POSIX ACL.
339 *********************************************************************/
341 static int sys_acl_set_file_tdb(vfs_handle_struct
*handle
,
346 SMB_STRUCT_STAT sbuf
;
347 struct db_context
*db
= acl_db
;
350 if (lp_posix_pathnames()) {
351 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
353 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
360 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle
,
368 acl_tdb_delete(handle
, db
, &sbuf
);
372 /*********************************************************************
373 Remove a Windows ACL - we're setting the underlying POSIX ACL.
374 *********************************************************************/
376 static int sys_acl_set_fd_tdb(vfs_handle_struct
*handle
,
380 struct db_context
*db
= acl_db
;
384 status
= vfs_stat_fsp(fsp
);
385 if (!NT_STATUS_IS_OK(status
)) {
389 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FD(handle
,
396 acl_tdb_delete(handle
, db
, &fsp
->fsp_name
->st
);
400 static struct vfs_fn_pointers vfs_acl_tdb_fns
= {
401 .connect_fn
= connect_acl_tdb
,
402 .disconnect
= disconnect_acl_tdb
,
403 .opendir
= opendir_acl_common
,
404 .mkdir
= mkdir_acl_common
,
405 .rmdir
= rmdir_acl_tdb
,
406 .open_fn
= open_acl_common
,
407 .create_file
= create_file_acl_common
,
408 .unlink
= unlink_acl_tdb
,
409 .chmod
= chmod_acl_module_common
,
410 .fchmod
= fchmod_acl_module_common
,
411 .fget_nt_acl
= fget_nt_acl_common
,
412 .get_nt_acl
= get_nt_acl_common
,
413 .fset_nt_acl
= fset_nt_acl_common
,
414 .chmod_acl
= chmod_acl_acl_module_common
,
415 .fchmod_acl
= fchmod_acl_acl_module_common
,
416 .sys_acl_set_file
= sys_acl_set_file_tdb
,
417 .sys_acl_set_fd
= sys_acl_set_fd_tdb
420 NTSTATUS
vfs_acl_tdb_init(void)
422 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "acl_tdb",