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"
29 #define DBGC_CLASS DBGC_VFS
31 #include "modules/vfs_acl_common.c"
33 static unsigned int ref_count
;
34 static struct db_context
*acl_db
;
36 /*******************************************************************
37 Open acl_db if not already open, increment ref count.
38 *******************************************************************/
40 static bool acl_tdb_init(void)
49 dbname
= state_path("file_ntacls.tdb");
57 acl_db
= db_open(NULL
, dbname
, 0, TDB_DEFAULT
, O_RDWR
|O_CREAT
, 0600);
75 /*******************************************************************
76 Lower ref count and close acl_db if zero.
77 *******************************************************************/
79 static void disconnect_acl_tdb(struct vfs_handle_struct
*handle
)
81 SMB_VFS_NEXT_DISCONNECT(handle
);
88 /*******************************************************************
89 Fetch_lock the tdb acl record for a file
90 *******************************************************************/
92 static struct db_record
*acl_tdb_lock(TALLOC_CTX
*mem_ctx
,
93 struct db_context
*db
,
94 const struct file_id
*id
)
98 /* For backwards compatibility only store the dev/inode. */
99 push_file_id_16((char *)id_buf
, id
);
100 return db
->fetch_locked(db
,
102 make_tdb_data(id_buf
,
106 /*******************************************************************
107 Delete the tdb acl record for a file
108 *******************************************************************/
110 static NTSTATUS
acl_tdb_delete(vfs_handle_struct
*handle
,
111 struct db_context
*db
,
112 SMB_STRUCT_STAT
*psbuf
)
115 struct file_id id
= vfs_file_id_from_sbuf(handle
->conn
, psbuf
);
116 struct db_record
*rec
= acl_tdb_lock(talloc_tos(), db
, &id
);
119 * If rec == NULL there's not much we can do about it
123 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
128 status
= rec
->delete_rec(rec
);
133 /*******************************************************************
134 Pull a security descriptor into a DATA_BLOB from a tdb store.
135 *******************************************************************/
137 static NTSTATUS
get_acl_blob(TALLOC_CTX
*ctx
,
138 vfs_handle_struct
*handle
,
146 struct db_context
*db
= acl_db
;
147 NTSTATUS status
= NT_STATUS_OK
;
148 SMB_STRUCT_STAT sbuf
;
153 status
= vfs_stat_fsp(fsp
);
154 sbuf
= fsp
->fsp_name
->st
;
156 int ret
= vfs_stat_smb_fname(handle
->conn
, name
, &sbuf
);
158 status
= map_nt_error_from_unix(errno
);
162 if (!NT_STATUS_IS_OK(status
)) {
166 id
= vfs_file_id_from_sbuf(handle
->conn
, &sbuf
);
168 /* For backwards compatibility only store the dev/inode. */
169 push_file_id_16((char *)id_buf
, &id
);
173 make_tdb_data(id_buf
, sizeof(id_buf
)),
175 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
178 pblob
->data
= data
.dptr
;
179 pblob
->length
= data
.dsize
;
181 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
182 (unsigned int)data
.dsize
, name
));
184 if (pblob
->length
== 0 || pblob
->data
== NULL
) {
185 return NT_STATUS_NOT_FOUND
;
190 /*******************************************************************
191 Store a DATA_BLOB into a tdb record given an fsp pointer.
192 *******************************************************************/
194 static NTSTATUS
store_acl_blob_fsp(vfs_handle_struct
*handle
,
201 struct db_context
*db
= acl_db
;
202 struct db_record
*rec
;
205 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
206 (unsigned int)pblob
->length
, fsp_str_dbg(fsp
)));
208 status
= vfs_stat_fsp(fsp
);
209 if (!NT_STATUS_IS_OK(status
)) {
213 id
= vfs_file_id_from_sbuf(handle
->conn
, &fsp
->fsp_name
->st
);
215 /* For backwards compatibility only store the dev/inode. */
216 push_file_id_16((char *)id_buf
, &id
);
217 rec
= db
->fetch_locked(db
, talloc_tos(),
218 make_tdb_data(id_buf
,
221 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
222 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
224 data
.dptr
= pblob
->data
;
225 data
.dsize
= pblob
->length
;
226 return rec
->store(rec
, data
, 0);
229 /*********************************************************************
230 On unlink we need to delete the tdb record (if using tdb).
231 *********************************************************************/
233 static int unlink_acl_tdb(vfs_handle_struct
*handle
,
234 const struct smb_filename
*smb_fname
)
236 struct smb_filename
*smb_fname_tmp
= NULL
;
237 struct db_context
*db
= acl_db
;
241 status
= copy_smb_filename(talloc_tos(), smb_fname
, &smb_fname_tmp
);
242 if (!NT_STATUS_IS_OK(status
)) {
243 errno
= map_errno_from_nt_status(status
);
247 if (lp_posix_pathnames()) {
248 ret
= SMB_VFS_LSTAT(handle
->conn
, smb_fname_tmp
);
250 ret
= SMB_VFS_STAT(handle
->conn
, smb_fname_tmp
);
257 ret
= unlink_acl_common(handle
, smb_fname_tmp
);
263 acl_tdb_delete(handle
, db
, &smb_fname_tmp
->st
);
268 /*********************************************************************
269 On rmdir we need to delete the tdb record (if using tdb).
270 *********************************************************************/
272 static int rmdir_acl_tdb(vfs_handle_struct
*handle
, const char *path
)
275 SMB_STRUCT_STAT sbuf
;
276 struct db_context
*db
= acl_db
;
279 if (lp_posix_pathnames()) {
280 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
282 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
289 ret
= rmdir_acl_common(handle
, path
);
294 acl_tdb_delete(handle
, db
, &sbuf
);
298 /*******************************************************************
299 Handle opening the storage tdb if so configured.
300 *******************************************************************/
302 static int connect_acl_tdb(struct vfs_handle_struct
*handle
,
306 int ret
= SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
312 if (!acl_tdb_init()) {
313 SMB_VFS_NEXT_DISCONNECT(handle
);
317 /* Ensure we have "inherit acls = yes" if we're
318 * using this module. */
319 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
320 "and 'dos filemode = true' for service %s\n",
322 lp_do_parameter(SNUM(handle
->conn
), "inherit acls", "true");
323 lp_do_parameter(SNUM(handle
->conn
), "dos filemode", "true");
328 /*********************************************************************
329 Remove a Windows ACL - we're setting the underlying POSIX ACL.
330 *********************************************************************/
332 static int sys_acl_set_file_tdb(vfs_handle_struct
*handle
,
337 SMB_STRUCT_STAT sbuf
;
338 struct db_context
*db
= acl_db
;
341 if (lp_posix_pathnames()) {
342 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
344 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
351 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle
,
359 acl_tdb_delete(handle
, db
, &sbuf
);
363 /*********************************************************************
364 Remove a Windows ACL - we're setting the underlying POSIX ACL.
365 *********************************************************************/
367 static int sys_acl_set_fd_tdb(vfs_handle_struct
*handle
,
371 struct db_context
*db
= acl_db
;
375 status
= vfs_stat_fsp(fsp
);
376 if (!NT_STATUS_IS_OK(status
)) {
380 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FD(handle
,
387 acl_tdb_delete(handle
, db
, &fsp
->fsp_name
->st
);
391 static struct vfs_fn_pointers vfs_acl_tdb_fns
= {
392 .connect_fn
= connect_acl_tdb
,
393 .disconnect
= disconnect_acl_tdb
,
394 .opendir
= opendir_acl_common
,
395 .mkdir
= mkdir_acl_common
,
396 .open
= open_acl_common
,
397 .create_file
= create_file_acl_common
,
398 .unlink
= unlink_acl_tdb
,
399 .rmdir
= rmdir_acl_tdb
,
400 .fget_nt_acl
= fget_nt_acl_common
,
401 .get_nt_acl
= get_nt_acl_common
,
402 .fset_nt_acl
= fset_nt_acl_common
,
403 .sys_acl_set_file
= sys_acl_set_file_tdb
,
404 .sys_acl_set_fd
= sys_acl_set_fd_tdb
407 NTSTATUS
vfs_acl_tdb_init(void)
409 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "acl_tdb",