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/>.
22 #include "smbd/smbd.h"
23 #include "system/filesys.h"
24 #include "librpc/gen_ndr/xattr.h"
25 #include "../lib/crypto/sha256.h"
26 #include "dbwrap/dbwrap.h"
27 #include "dbwrap/dbwrap_open.h"
30 #include "vfs_acl_common.h"
33 #define DBGC_CLASS DBGC_VFS
35 #define ACL_MODULE_NAME "acl_tdb"
37 static unsigned int ref_count
;
38 static struct db_context
*acl_db
;
40 /*******************************************************************
41 Open acl_db if not already open, increment ref count.
42 *******************************************************************/
44 static bool acl_tdb_init(void)
53 dbname
= state_path("file_ntacls.tdb");
61 acl_db
= db_open(NULL
, dbname
, 0, TDB_DEFAULT
, O_RDWR
|O_CREAT
, 0600,
62 DBWRAP_LOCK_ORDER_1
, DBWRAP_FLAG_NONE
);
80 /*******************************************************************
81 Lower ref count and close acl_db if zero.
82 *******************************************************************/
84 static void disconnect_acl_tdb(struct vfs_handle_struct
*handle
)
86 SMB_VFS_NEXT_DISCONNECT(handle
);
93 /*******************************************************************
94 Fetch_lock the tdb acl record for a file
95 *******************************************************************/
97 static struct db_record
*acl_tdb_lock(TALLOC_CTX
*mem_ctx
,
98 struct db_context
*db
,
99 const struct file_id
*id
)
103 /* For backwards compatibility only store the dev/inode. */
104 push_file_id_16((char *)id_buf
, id
);
105 return dbwrap_fetch_locked(db
,
107 make_tdb_data(id_buf
,
111 /*******************************************************************
112 Delete the tdb acl record for a file
113 *******************************************************************/
115 static NTSTATUS
acl_tdb_delete(vfs_handle_struct
*handle
,
116 struct db_context
*db
,
117 SMB_STRUCT_STAT
*psbuf
)
120 struct file_id id
= vfs_file_id_from_sbuf(handle
->conn
, psbuf
);
121 struct db_record
*rec
= acl_tdb_lock(talloc_tos(), db
, &id
);
124 * If rec == NULL there's not much we can do about it
128 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
133 status
= dbwrap_record_delete(rec
);
138 /*******************************************************************
139 Pull a security descriptor into a DATA_BLOB from a tdb store.
140 *******************************************************************/
142 static NTSTATUS
get_acl_blob(TALLOC_CTX
*ctx
,
143 vfs_handle_struct
*handle
,
145 const struct smb_filename
*smb_fname
,
151 struct db_context
*db
= acl_db
;
152 NTSTATUS status
= NT_STATUS_OK
;
153 SMB_STRUCT_STAT sbuf
;
158 status
= vfs_stat_fsp(fsp
);
159 sbuf
= fsp
->fsp_name
->st
;
161 int ret
= vfs_stat_smb_basename(handle
->conn
,
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
);
178 status
= dbwrap_fetch(db
,
180 make_tdb_data(id_buf
, sizeof(id_buf
)),
182 if (!NT_STATUS_IS_OK(status
)) {
183 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
186 pblob
->data
= data
.dptr
;
187 pblob
->length
= data
.dsize
;
189 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
190 (unsigned int)data
.dsize
, smb_fname
->base_name
));
192 if (pblob
->length
== 0 || pblob
->data
== NULL
) {
193 return NT_STATUS_NOT_FOUND
;
198 /*******************************************************************
199 Store a DATA_BLOB into a tdb record given an fsp pointer.
200 *******************************************************************/
202 static NTSTATUS
store_acl_blob_fsp(vfs_handle_struct
*handle
,
209 struct db_context
*db
= acl_db
;
210 struct db_record
*rec
;
213 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
214 (unsigned int)pblob
->length
, fsp_str_dbg(fsp
)));
216 status
= vfs_stat_fsp(fsp
);
217 if (!NT_STATUS_IS_OK(status
)) {
221 id
= vfs_file_id_from_sbuf(handle
->conn
, &fsp
->fsp_name
->st
);
223 /* For backwards compatibility only store the dev/inode. */
224 push_file_id_16((char *)id_buf
, &id
);
225 rec
= dbwrap_fetch_locked(db
, talloc_tos(),
226 make_tdb_data(id_buf
,
229 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
230 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
232 data
.dptr
= pblob
->data
;
233 data
.dsize
= pblob
->length
;
234 return dbwrap_record_store(rec
, data
, 0);
237 /*********************************************************************
238 On unlink we need to delete the tdb record (if using tdb).
239 *********************************************************************/
241 static int unlink_acl_tdb(vfs_handle_struct
*handle
,
242 const struct smb_filename
*smb_fname
)
244 struct smb_filename
*smb_fname_tmp
= NULL
;
245 struct db_context
*db
= acl_db
;
248 smb_fname_tmp
= cp_smb_filename_nostream(talloc_tos(), smb_fname
);
249 if (smb_fname_tmp
== NULL
) {
254 if (smb_fname_tmp
->flags
& SMB_FILENAME_POSIX_PATH
) {
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
,
280 const struct smb_filename
*smb_fname
)
283 SMB_STRUCT_STAT sbuf
;
284 struct db_context
*db
= acl_db
;
287 ret
= vfs_stat_smb_basename(handle
->conn
, smb_fname
, &sbuf
);
292 ret
= rmdir_acl_common(handle
, smb_fname
);
297 acl_tdb_delete(handle
, db
, &sbuf
);
301 /*******************************************************************
302 Handle opening the storage tdb if so configured.
303 *******************************************************************/
305 static int connect_acl_tdb(struct vfs_handle_struct
*handle
,
309 int ret
= SMB_VFS_NEXT_CONNECT(handle
, service
, user
);
311 struct acl_common_config
*config
= NULL
;
317 if (!acl_tdb_init()) {
318 SMB_VFS_NEXT_DISCONNECT(handle
);
322 ok
= init_acl_common_config(handle
, ACL_MODULE_NAME
);
324 DBG_ERR("init_acl_common_config failed\n");
328 /* Ensure we have the parameters correct if we're
329 * using this module. */
330 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
331 "'dos filemode = true' and "
332 "'force unknown acl user = true' for service %s\n",
335 lp_do_parameter(SNUM(handle
->conn
), "inherit acls", "true");
336 lp_do_parameter(SNUM(handle
->conn
), "dos filemode", "true");
337 lp_do_parameter(SNUM(handle
->conn
), "force unknown acl user", "true");
339 SMB_VFS_HANDLE_GET_DATA(handle
, config
,
340 struct acl_common_config
,
343 if (config
->ignore_system_acls
) {
344 mode_t create_mask
= lp_create_mask(SNUM(handle
->conn
));
345 char *create_mask_str
= NULL
;
347 if ((create_mask
& 0666) != 0666) {
349 create_mask_str
= talloc_asprintf(handle
, "0%o",
351 if (create_mask_str
== NULL
) {
352 DBG_ERR("talloc_asprintf failed\n");
356 DBG_NOTICE("setting 'create mask = %s'\n", create_mask_str
);
358 lp_do_parameter (SNUM(handle
->conn
),
359 "create mask", create_mask_str
);
361 TALLOC_FREE(create_mask_str
);
364 DBG_NOTICE("setting 'directory mask = 0777', "
365 "'store dos attributes = yes' and all "
366 "'map ...' options to 'no'\n");
368 lp_do_parameter(SNUM(handle
->conn
), "directory mask", "0777");
369 lp_do_parameter(SNUM(handle
->conn
), "map archive", "no");
370 lp_do_parameter(SNUM(handle
->conn
), "map hidden", "no");
371 lp_do_parameter(SNUM(handle
->conn
), "map readonly", "no");
372 lp_do_parameter(SNUM(handle
->conn
), "map system", "no");
373 lp_do_parameter(SNUM(handle
->conn
), "store dos attributes",
380 /*********************************************************************
381 Remove a Windows ACL - we're setting the underlying POSIX ACL.
382 *********************************************************************/
384 static int sys_acl_set_file_tdb(vfs_handle_struct
*handle
,
385 const struct smb_filename
*smb_fname_in
,
389 struct db_context
*db
= acl_db
;
392 struct smb_filename
*smb_fname
= NULL
;
394 smb_fname
= cp_smb_filename_nostream(talloc_tos(), smb_fname_in
);
395 if (smb_fname
== NULL
) {
399 ret
= SMB_VFS_STAT(handle
->conn
, smb_fname
);
405 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle
,
414 acl_tdb_delete(handle
, db
, &smb_fname
->st
);
417 TALLOC_FREE(smb_fname
);
419 if (saved_errno
!= 0) {
425 /*********************************************************************
426 Remove a Windows ACL - we're setting the underlying POSIX ACL.
427 *********************************************************************/
429 static int sys_acl_set_fd_tdb(vfs_handle_struct
*handle
,
433 struct db_context
*db
= acl_db
;
437 status
= vfs_stat_fsp(fsp
);
438 if (!NT_STATUS_IS_OK(status
)) {
442 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FD(handle
,
449 acl_tdb_delete(handle
, db
, &fsp
->fsp_name
->st
);
453 static NTSTATUS
acl_tdb_fget_nt_acl(vfs_handle_struct
*handle
,
455 uint32_t security_info
,
457 struct security_descriptor
**ppdesc
)
460 status
= get_nt_acl_common(get_acl_blob
, handle
, fsp
, NULL
,
461 security_info
, mem_ctx
, ppdesc
);
465 static NTSTATUS
acl_tdb_get_nt_acl(vfs_handle_struct
*handle
,
466 const struct smb_filename
*smb_fname
,
467 uint32_t security_info
,
469 struct security_descriptor
**ppdesc
)
472 status
= get_nt_acl_common(get_acl_blob
, handle
, NULL
, smb_fname
,
473 security_info
, mem_ctx
, ppdesc
);
477 static NTSTATUS
acl_tdb_fset_nt_acl(vfs_handle_struct
*handle
,
479 uint32_t security_info_sent
,
480 const struct security_descriptor
*psd
)
483 status
= fset_nt_acl_common(get_acl_blob
, store_acl_blob_fsp
,
485 handle
, fsp
, security_info_sent
, psd
);
489 static struct vfs_fn_pointers vfs_acl_tdb_fns
= {
490 .connect_fn
= connect_acl_tdb
,
491 .disconnect_fn
= disconnect_acl_tdb
,
492 .rmdir_fn
= rmdir_acl_tdb
,
493 .unlink_fn
= unlink_acl_tdb
,
494 .chmod_fn
= chmod_acl_module_common
,
495 .fchmod_fn
= fchmod_acl_module_common
,
496 .fget_nt_acl_fn
= acl_tdb_fget_nt_acl
,
497 .get_nt_acl_fn
= acl_tdb_get_nt_acl
,
498 .fset_nt_acl_fn
= acl_tdb_fset_nt_acl
,
499 .chmod_acl_fn
= chmod_acl_acl_module_common
,
500 .fchmod_acl_fn
= fchmod_acl_acl_module_common
,
501 .sys_acl_set_file_fn
= sys_acl_set_file_tdb
,
502 .sys_acl_set_fd_fn
= sys_acl_set_fd_tdb
506 NTSTATUS
vfs_acl_tdb_init(TALLOC_CTX
*ctx
)
508 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "acl_tdb",