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"
29 #include "dbwrap/dbwrap.h"
30 #include "dbwrap/dbwrap_open.h"
35 #define DBGC_CLASS DBGC_VFS
37 #define ACL_MODULE_NAME "acl_tdb"
38 #include "modules/vfs_acl_common.c"
40 static unsigned int ref_count
;
41 static struct db_context
*acl_db
;
43 /*******************************************************************
44 Open acl_db if not already open, increment ref count.
45 *******************************************************************/
47 static bool acl_tdb_init(void)
56 dbname
= state_path("file_ntacls.tdb");
64 acl_db
= db_open(NULL
, dbname
, 0, TDB_DEFAULT
, O_RDWR
|O_CREAT
, 0600);
82 /*******************************************************************
83 Lower ref count and close acl_db if zero.
84 *******************************************************************/
86 static void disconnect_acl_tdb(struct vfs_handle_struct
*handle
)
88 SMB_VFS_NEXT_DISCONNECT(handle
);
95 /*******************************************************************
96 Fetch_lock the tdb acl record for a file
97 *******************************************************************/
99 static struct db_record
*acl_tdb_lock(TALLOC_CTX
*mem_ctx
,
100 struct db_context
*db
,
101 const struct file_id
*id
)
105 /* For backwards compatibility only store the dev/inode. */
106 push_file_id_16((char *)id_buf
, id
);
107 return db
->fetch_locked(db
,
109 make_tdb_data(id_buf
,
113 /*******************************************************************
114 Delete the tdb acl record for a file
115 *******************************************************************/
117 static NTSTATUS
acl_tdb_delete(vfs_handle_struct
*handle
,
118 struct db_context
*db
,
119 SMB_STRUCT_STAT
*psbuf
)
122 struct file_id id
= vfs_file_id_from_sbuf(handle
->conn
, psbuf
);
123 struct db_record
*rec
= acl_tdb_lock(talloc_tos(), db
, &id
);
126 * If rec == NULL there's not much we can do about it
130 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
135 status
= rec
->delete_rec(rec
);
140 /*******************************************************************
141 Pull a security descriptor into a DATA_BLOB from a tdb store.
142 *******************************************************************/
144 static NTSTATUS
get_acl_blob(TALLOC_CTX
*ctx
,
145 vfs_handle_struct
*handle
,
153 struct db_context
*db
= acl_db
;
154 NTSTATUS status
= NT_STATUS_OK
;
155 SMB_STRUCT_STAT sbuf
;
160 status
= vfs_stat_fsp(fsp
);
161 sbuf
= fsp
->fsp_name
->st
;
163 int ret
= vfs_stat_smb_fname(handle
->conn
, name
, &sbuf
);
165 status
= map_nt_error_from_unix(errno
);
169 if (!NT_STATUS_IS_OK(status
)) {
173 id
= vfs_file_id_from_sbuf(handle
->conn
, &sbuf
);
175 /* For backwards compatibility only store the dev/inode. */
176 push_file_id_16((char *)id_buf
, &id
);
180 make_tdb_data(id_buf
, sizeof(id_buf
)),
182 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
185 pblob
->data
= data
.dptr
;
186 pblob
->length
= data
.dsize
;
188 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
189 (unsigned int)data
.dsize
, name
));
191 if (pblob
->length
== 0 || pblob
->data
== NULL
) {
192 return NT_STATUS_NOT_FOUND
;
197 /*******************************************************************
198 Store a DATA_BLOB into a tdb record given an fsp pointer.
199 *******************************************************************/
201 static NTSTATUS
store_acl_blob_fsp(vfs_handle_struct
*handle
,
208 struct db_context
*db
= acl_db
;
209 struct db_record
*rec
;
212 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
213 (unsigned int)pblob
->length
, fsp_str_dbg(fsp
)));
215 status
= vfs_stat_fsp(fsp
);
216 if (!NT_STATUS_IS_OK(status
)) {
220 id
= vfs_file_id_from_sbuf(handle
->conn
, &fsp
->fsp_name
->st
);
222 /* For backwards compatibility only store the dev/inode. */
223 push_file_id_16((char *)id_buf
, &id
);
224 rec
= db
->fetch_locked(db
, talloc_tos(),
225 make_tdb_data(id_buf
,
228 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
229 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
231 data
.dptr
= pblob
->data
;
232 data
.dsize
= pblob
->length
;
233 return rec
->store(rec
, data
, 0);
236 /*********************************************************************
237 On unlink we need to delete the tdb record (if using tdb).
238 *********************************************************************/
240 static int unlink_acl_tdb(vfs_handle_struct
*handle
,
241 const struct smb_filename
*smb_fname
)
243 struct smb_filename
*smb_fname_tmp
= NULL
;
244 struct db_context
*db
= acl_db
;
248 status
= copy_smb_filename(talloc_tos(), smb_fname
, &smb_fname_tmp
);
249 if (!NT_STATUS_IS_OK(status
)) {
250 errno
= map_errno_from_nt_status(status
);
254 if (lp_posix_pathnames()) {
255 ret
= SMB_VFS_LSTAT(handle
->conn
, smb_fname_tmp
);
257 ret
= SMB_VFS_STAT(handle
->conn
, smb_fname_tmp
);
264 ret
= unlink_acl_common(handle
, smb_fname_tmp
);
270 acl_tdb_delete(handle
, db
, &smb_fname_tmp
->st
);
275 /*********************************************************************
276 On rmdir we need to delete the tdb record (if using tdb).
277 *********************************************************************/
279 static int rmdir_acl_tdb(vfs_handle_struct
*handle
, const char *path
)
282 SMB_STRUCT_STAT sbuf
;
283 struct db_context
*db
= acl_db
;
286 if (lp_posix_pathnames()) {
287 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
289 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
296 ret
= rmdir_acl_common(handle
, path
);
301 acl_tdb_delete(handle
, db
, &sbuf
);
305 /*******************************************************************
306 Handle opening the storage tdb if so configured.
307 *******************************************************************/
309 static int connect_acl_tdb(struct vfs_handle_struct
*handle
,
313 int ret
= SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
319 if (!acl_tdb_init()) {
320 SMB_VFS_NEXT_DISCONNECT(handle
);
324 /* Ensure we have the parameters correct if we're
325 * using this module. */
326 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
327 "'dos filemode = true' and "
328 "'force unknown acl user = true' for service %s\n",
331 lp_do_parameter(SNUM(handle
->conn
), "inherit acls", "true");
332 lp_do_parameter(SNUM(handle
->conn
), "dos filemode", "true");
333 lp_do_parameter(SNUM(handle
->conn
), "force unknown acl user", "true");
338 /*********************************************************************
339 Remove a Windows ACL - we're setting the underlying POSIX ACL.
340 *********************************************************************/
342 static int sys_acl_set_file_tdb(vfs_handle_struct
*handle
,
347 SMB_STRUCT_STAT sbuf
;
348 struct db_context
*db
= acl_db
;
351 if (lp_posix_pathnames()) {
352 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
354 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
361 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle
,
369 acl_tdb_delete(handle
, db
, &sbuf
);
373 /*********************************************************************
374 Remove a Windows ACL - we're setting the underlying POSIX ACL.
375 *********************************************************************/
377 static int sys_acl_set_fd_tdb(vfs_handle_struct
*handle
,
381 struct db_context
*db
= acl_db
;
385 status
= vfs_stat_fsp(fsp
);
386 if (!NT_STATUS_IS_OK(status
)) {
390 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FD(handle
,
397 acl_tdb_delete(handle
, db
, &fsp
->fsp_name
->st
);
401 static struct vfs_fn_pointers vfs_acl_tdb_fns
= {
402 .connect_fn
= connect_acl_tdb
,
403 .disconnect
= disconnect_acl_tdb
,
404 .opendir
= opendir_acl_common
,
405 .mkdir
= mkdir_acl_common
,
406 .rmdir
= rmdir_acl_tdb
,
407 .open_fn
= open_acl_common
,
408 .create_file
= create_file_acl_common
,
409 .unlink
= unlink_acl_tdb
,
410 .chmod
= chmod_acl_module_common
,
411 .fchmod
= fchmod_acl_module_common
,
412 .fget_nt_acl
= fget_nt_acl_common
,
413 .get_nt_acl
= get_nt_acl_common
,
414 .fset_nt_acl
= fset_nt_acl_common
,
415 .chmod_acl
= chmod_acl_acl_module_common
,
416 .fchmod_acl
= fchmod_acl_acl_module_common
,
417 .sys_acl_set_file
= sys_acl_set_file_tdb
,
418 .sys_acl_set_fd
= sys_acl_set_fd_tdb
421 NTSTATUS
vfs_acl_tdb_init(void)
423 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "acl_tdb",