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 "librpc/gen_ndr/xattr.h"
25 #include "librpc/gen_ndr/ndr_xattr.h"
26 #include "../lib/crypto/crypto.h"
30 #define DBGC_CLASS DBGC_VFS
32 #define ACL_MODULE_NAME "acl_tdb"
33 #include "modules/vfs_acl_common.c"
35 static unsigned int ref_count
;
36 static struct db_context
*acl_db
;
38 /*******************************************************************
39 Open acl_db if not already open, increment ref count.
40 *******************************************************************/
42 static bool acl_tdb_init(void)
51 dbname
= state_path("file_ntacls.tdb");
59 acl_db
= db_open(NULL
, dbname
, 0, TDB_DEFAULT
, O_RDWR
|O_CREAT
, 0600);
77 /*******************************************************************
78 Lower ref count and close acl_db if zero.
79 *******************************************************************/
81 static void disconnect_acl_tdb(struct vfs_handle_struct
*handle
)
83 SMB_VFS_NEXT_DISCONNECT(handle
);
90 /*******************************************************************
91 Fetch_lock the tdb acl record for a file
92 *******************************************************************/
94 static struct db_record
*acl_tdb_lock(TALLOC_CTX
*mem_ctx
,
95 struct db_context
*db
,
96 const struct file_id
*id
)
100 /* For backwards compatibility only store the dev/inode. */
101 push_file_id_16((char *)id_buf
, id
);
102 return db
->fetch_locked(db
,
104 make_tdb_data(id_buf
,
108 /*******************************************************************
109 Delete the tdb acl record for a file
110 *******************************************************************/
112 static NTSTATUS
acl_tdb_delete(vfs_handle_struct
*handle
,
113 struct db_context
*db
,
114 SMB_STRUCT_STAT
*psbuf
)
117 struct file_id id
= vfs_file_id_from_sbuf(handle
->conn
, psbuf
);
118 struct db_record
*rec
= acl_tdb_lock(talloc_tos(), db
, &id
);
121 * If rec == NULL there's not much we can do about it
125 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
130 status
= rec
->delete_rec(rec
);
135 /*******************************************************************
136 Pull a security descriptor into a DATA_BLOB from a tdb store.
137 *******************************************************************/
139 static NTSTATUS
get_acl_blob(TALLOC_CTX
*ctx
,
140 vfs_handle_struct
*handle
,
148 struct db_context
*db
= acl_db
;
149 NTSTATUS status
= NT_STATUS_OK
;
150 SMB_STRUCT_STAT sbuf
;
155 status
= vfs_stat_fsp(fsp
);
156 sbuf
= fsp
->fsp_name
->st
;
158 int ret
= vfs_stat_smb_fname(handle
->conn
, name
, &sbuf
);
160 status
= map_nt_error_from_unix(errno
);
164 if (!NT_STATUS_IS_OK(status
)) {
168 id
= vfs_file_id_from_sbuf(handle
->conn
, &sbuf
);
170 /* For backwards compatibility only store the dev/inode. */
171 push_file_id_16((char *)id_buf
, &id
);
175 make_tdb_data(id_buf
, sizeof(id_buf
)),
177 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
180 pblob
->data
= data
.dptr
;
181 pblob
->length
= data
.dsize
;
183 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
184 (unsigned int)data
.dsize
, name
));
186 if (pblob
->length
== 0 || pblob
->data
== NULL
) {
187 return NT_STATUS_NOT_FOUND
;
192 /*******************************************************************
193 Store a DATA_BLOB into a tdb record given an fsp pointer.
194 *******************************************************************/
196 static NTSTATUS
store_acl_blob_fsp(vfs_handle_struct
*handle
,
203 struct db_context
*db
= acl_db
;
204 struct db_record
*rec
;
207 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
208 (unsigned int)pblob
->length
, fsp_str_dbg(fsp
)));
210 status
= vfs_stat_fsp(fsp
);
211 if (!NT_STATUS_IS_OK(status
)) {
215 id
= vfs_file_id_from_sbuf(handle
->conn
, &fsp
->fsp_name
->st
);
217 /* For backwards compatibility only store the dev/inode. */
218 push_file_id_16((char *)id_buf
, &id
);
219 rec
= db
->fetch_locked(db
, talloc_tos(),
220 make_tdb_data(id_buf
,
223 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
224 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
226 data
.dptr
= pblob
->data
;
227 data
.dsize
= pblob
->length
;
228 return rec
->store(rec
, data
, 0);
231 /*********************************************************************
232 On unlink we need to delete the tdb record (if using tdb).
233 *********************************************************************/
235 static int unlink_acl_tdb(vfs_handle_struct
*handle
,
236 const struct smb_filename
*smb_fname
)
238 struct smb_filename
*smb_fname_tmp
= NULL
;
239 struct db_context
*db
= acl_db
;
243 status
= copy_smb_filename(talloc_tos(), smb_fname
, &smb_fname_tmp
);
244 if (!NT_STATUS_IS_OK(status
)) {
245 errno
= map_errno_from_nt_status(status
);
249 if (lp_posix_pathnames()) {
250 ret
= SMB_VFS_LSTAT(handle
->conn
, smb_fname_tmp
);
252 ret
= SMB_VFS_STAT(handle
->conn
, smb_fname_tmp
);
259 ret
= unlink_acl_common(handle
, smb_fname_tmp
);
265 acl_tdb_delete(handle
, db
, &smb_fname_tmp
->st
);
270 /*********************************************************************
271 On rmdir we need to delete the tdb record (if using tdb).
272 *********************************************************************/
274 static int rmdir_acl_tdb(vfs_handle_struct
*handle
, const char *path
)
277 SMB_STRUCT_STAT sbuf
;
278 struct db_context
*db
= acl_db
;
281 if (lp_posix_pathnames()) {
282 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
284 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
291 ret
= rmdir_acl_common(handle
, path
);
296 acl_tdb_delete(handle
, db
, &sbuf
);
300 /*******************************************************************
301 Handle opening the storage tdb if so configured.
302 *******************************************************************/
304 static int connect_acl_tdb(struct vfs_handle_struct
*handle
,
308 int ret
= SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
314 if (!acl_tdb_init()) {
315 SMB_VFS_NEXT_DISCONNECT(handle
);
319 /* Ensure we have the parameters correct if we're
320 * using this module. */
321 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
322 "'dos filemode = true' and "
323 "'force unknown acl user = true' for service %s\n",
326 lp_do_parameter(SNUM(handle
->conn
), "inherit acls", "true");
327 lp_do_parameter(SNUM(handle
->conn
), "dos filemode", "true");
328 lp_do_parameter(SNUM(handle
->conn
), "force unknown acl user", "true");
333 /*********************************************************************
334 Remove a Windows ACL - we're setting the underlying POSIX ACL.
335 *********************************************************************/
337 static int sys_acl_set_file_tdb(vfs_handle_struct
*handle
,
342 SMB_STRUCT_STAT sbuf
;
343 struct db_context
*db
= acl_db
;
346 if (lp_posix_pathnames()) {
347 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
349 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
356 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle
,
364 acl_tdb_delete(handle
, db
, &sbuf
);
368 /*********************************************************************
369 Remove a Windows ACL - we're setting the underlying POSIX ACL.
370 *********************************************************************/
372 static int sys_acl_set_fd_tdb(vfs_handle_struct
*handle
,
376 struct db_context
*db
= acl_db
;
380 status
= vfs_stat_fsp(fsp
);
381 if (!NT_STATUS_IS_OK(status
)) {
385 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FD(handle
,
392 acl_tdb_delete(handle
, db
, &fsp
->fsp_name
->st
);
396 static struct vfs_fn_pointers vfs_acl_tdb_fns
= {
397 .connect_fn
= connect_acl_tdb
,
398 .disconnect
= disconnect_acl_tdb
,
399 .opendir
= opendir_acl_common
,
400 .mkdir
= mkdir_acl_common
,
401 .open
= open_acl_common
,
402 .create_file
= create_file_acl_common
,
403 .unlink
= unlink_acl_tdb
,
404 .rmdir
= rmdir_acl_tdb
,
405 .fget_nt_acl
= fget_nt_acl_common
,
406 .get_nt_acl
= get_nt_acl_common
,
407 .fset_nt_acl
= fset_nt_acl_common
,
408 .sys_acl_set_file
= sys_acl_set_file_tdb
,
409 .sys_acl_set_fd
= sys_acl_set_fd_tdb
412 NTSTATUS
vfs_acl_tdb_init(void)
414 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "acl_tdb",