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(struct db_context
**pp_db
)
50 dbname
= state_path("file_ntacls.tdb");
58 *pp_db
= db_open(NULL
, dbname
, 0, TDB_DEFAULT
, O_RDWR
|O_CREAT
, 0600);
76 /*******************************************************************
77 Lower ref count and close acl_db if zero.
78 *******************************************************************/
80 static void free_acl_tdb_data(void **pptr
)
82 struct db_context
**pp_db
= (struct db_context
**)pptr
;
91 /*******************************************************************
92 Fetch_lock the tdb acl record for a file
93 *******************************************************************/
95 static struct db_record
*acl_tdb_lock(TALLOC_CTX
*mem_ctx
,
96 struct db_context
*db
,
97 const struct file_id
*id
)
101 /* For backwards compatibility only store the dev/inode. */
102 push_file_id_16((char *)id_buf
, id
);
103 return db
->fetch_locked(db
,
105 make_tdb_data(id_buf
,
109 /*******************************************************************
110 Delete the tdb acl record for a file
111 *******************************************************************/
113 static NTSTATUS
acl_tdb_delete(vfs_handle_struct
*handle
,
114 struct db_context
*db
,
115 SMB_STRUCT_STAT
*psbuf
)
118 struct file_id id
= vfs_file_id_from_sbuf(handle
->conn
, psbuf
);
119 struct db_record
*rec
= acl_tdb_lock(talloc_tos(), db
, &id
);
122 * If rec == NULL there's not much we can do about it
126 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
131 status
= rec
->delete_rec(rec
);
136 /*******************************************************************
137 Pull a security descriptor into a DATA_BLOB from a tdb store.
138 *******************************************************************/
140 static NTSTATUS
get_acl_blob(TALLOC_CTX
*ctx
,
141 vfs_handle_struct
*handle
,
149 struct db_context
*db
;
151 SMB_STRUCT_STAT sbuf
;
153 SMB_VFS_HANDLE_GET_DATA(handle
, db
, struct db_context
,
154 return NT_STATUS_INTERNAL_DB_CORRUPTION
);
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
;
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 SMB_VFS_HANDLE_GET_DATA(handle
, db
, struct db_context
,
215 return NT_STATUS_INTERNAL_DB_CORRUPTION
);
217 status
= vfs_stat_fsp(fsp
);
218 if (!NT_STATUS_IS_OK(status
)) {
222 id
= vfs_file_id_from_sbuf(handle
->conn
, &fsp
->fsp_name
->st
);
224 /* For backwards compatibility only store the dev/inode. */
225 push_file_id_16((char *)id_buf
, &id
);
226 rec
= db
->fetch_locked(db
, talloc_tos(),
227 make_tdb_data(id_buf
,
230 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
231 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
233 data
.dptr
= pblob
->data
;
234 data
.dsize
= pblob
->length
;
235 return rec
->store(rec
, data
, 0);
238 /*********************************************************************
239 On unlink we need to delete the tdb record (if using tdb).
240 *********************************************************************/
242 static int unlink_acl_tdb(vfs_handle_struct
*handle
,
243 const struct smb_filename
*smb_fname
)
245 struct smb_filename
*smb_fname_tmp
= NULL
;
246 struct db_context
*db
;
250 SMB_VFS_HANDLE_GET_DATA(handle
, db
, struct db_context
, return -1);
252 status
= copy_smb_filename(talloc_tos(), smb_fname
, &smb_fname_tmp
);
253 if (!NT_STATUS_IS_OK(status
)) {
254 errno
= map_errno_from_nt_status(status
);
258 if (lp_posix_pathnames()) {
259 ret
= SMB_VFS_LSTAT(handle
->conn
, smb_fname_tmp
);
261 ret
= SMB_VFS_STAT(handle
->conn
, smb_fname_tmp
);
268 ret
= SMB_VFS_NEXT_UNLINK(handle
, smb_fname_tmp
);
274 acl_tdb_delete(handle
, db
, &smb_fname_tmp
->st
);
279 /*********************************************************************
280 On rmdir we need to delete the tdb record (if using tdb).
281 *********************************************************************/
283 static int rmdir_acl_tdb(vfs_handle_struct
*handle
, const char *path
)
286 SMB_STRUCT_STAT sbuf
;
287 struct db_context
*db
;
290 SMB_VFS_HANDLE_GET_DATA(handle
, db
, struct db_context
, return -1);
292 if (lp_posix_pathnames()) {
293 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
295 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
302 ret
= SMB_VFS_NEXT_RMDIR(handle
, path
);
307 acl_tdb_delete(handle
, db
, &sbuf
);
311 /*******************************************************************
312 Handle opening the storage tdb if so configured.
313 *******************************************************************/
315 static int connect_acl_tdb(struct vfs_handle_struct
*handle
,
319 struct db_context
*db
;
320 int ret
= SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
326 if (!acl_tdb_init(&db
)) {
327 SMB_VFS_NEXT_DISCONNECT(handle
);
331 SMB_VFS_HANDLE_SET_DATA(handle
, db
, free_acl_tdb_data
,
332 struct db_context
, return -1);
334 /* Ensure we have "inherit acls = yes" if we're
335 * using this module. */
336 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
337 "and 'dos filemode = true' for service %s\n",
339 lp_do_parameter(SNUM(handle
->conn
), "inherit acls", "true");
340 lp_do_parameter(SNUM(handle
->conn
), "dos filemode", "true");
345 /*********************************************************************
346 Remove a Windows ACL - we're setting the underlying POSIX ACL.
347 *********************************************************************/
349 static int sys_acl_set_file_tdb(vfs_handle_struct
*handle
,
354 SMB_STRUCT_STAT sbuf
;
355 struct db_context
*db
;
358 SMB_VFS_HANDLE_GET_DATA(handle
, db
, struct db_context
, return -1);
360 if (lp_posix_pathnames()) {
361 ret
= vfs_lstat_smb_fname(handle
->conn
, path
, &sbuf
);
363 ret
= vfs_stat_smb_fname(handle
->conn
, path
, &sbuf
);
370 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle
,
378 acl_tdb_delete(handle
, db
, &sbuf
);
382 /*********************************************************************
383 Remove a Windows ACL - we're setting the underlying POSIX ACL.
384 *********************************************************************/
386 static int sys_acl_set_fd_tdb(vfs_handle_struct
*handle
,
390 struct db_context
*db
;
394 SMB_VFS_HANDLE_GET_DATA(handle
, db
, struct db_context
, return -1);
396 status
= vfs_stat_fsp(fsp
);
397 if (!NT_STATUS_IS_OK(status
)) {
401 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FD(handle
,
408 acl_tdb_delete(handle
, db
, &fsp
->fsp_name
->st
);
412 static struct vfs_fn_pointers vfs_acl_tdb_fns
= {
413 .connect_fn
= connect_acl_tdb
,
414 .opendir
= opendir_acl_common
,
415 .mkdir
= mkdir_acl_common
,
416 .open
= open_acl_common
,
417 .create_file
= create_file_acl_common
,
418 .unlink
= unlink_acl_tdb
,
419 .rmdir
= rmdir_acl_tdb
,
420 .fget_nt_acl
= fget_nt_acl_common
,
421 .get_nt_acl
= get_nt_acl_common
,
422 .fset_nt_acl
= fset_nt_acl_common
,
423 .sys_acl_set_file
= sys_acl_set_file_tdb
,
424 .sys_acl_set_fd
= sys_acl_set_fd_tdb
427 NTSTATUS
vfs_acl_tdb_init(void)
429 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "acl_tdb",