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 "dbwrap/dbwrap.h"
26 #include "dbwrap/dbwrap_open.h"
29 #include "vfs_acl_common.h"
32 #define DBGC_CLASS DBGC_VFS
34 #define ACL_MODULE_NAME "acl_tdb"
36 static unsigned int ref_count
;
37 static struct db_context
*acl_db
;
39 /*******************************************************************
40 Open acl_db if not already open, increment ref count.
41 *******************************************************************/
43 static bool acl_tdb_init(void)
52 dbname
= state_path(talloc_tos(), "file_ntacls.tdb");
60 acl_db
= db_open(NULL
, dbname
, 0, TDB_DEFAULT
, O_RDWR
|O_CREAT
, 0600,
61 DBWRAP_LOCK_ORDER_1
, DBWRAP_FLAG_NONE
);
79 /*******************************************************************
80 Lower ref count and close acl_db if zero.
81 *******************************************************************/
83 static void disconnect_acl_tdb(struct vfs_handle_struct
*handle
)
85 SMB_VFS_NEXT_DISCONNECT(handle
);
92 /*******************************************************************
93 Fetch_lock the tdb acl record for a file
94 *******************************************************************/
96 static struct db_record
*acl_tdb_lock(TALLOC_CTX
*mem_ctx
,
97 struct db_context
*db
,
98 const struct file_id
*id
)
102 /* For backwards compatibility only store the dev/inode. */
103 push_file_id_16((char *)id_buf
, id
);
104 return dbwrap_fetch_locked(db
,
106 make_tdb_data(id_buf
,
110 /*******************************************************************
111 Delete the tdb acl record for a file
112 *******************************************************************/
114 static NTSTATUS
acl_tdb_delete(vfs_handle_struct
*handle
,
115 struct db_context
*db
,
116 SMB_STRUCT_STAT
*psbuf
)
119 struct file_id id
= vfs_file_id_from_sbuf(handle
->conn
, psbuf
);
120 struct db_record
*rec
= acl_tdb_lock(talloc_tos(), db
, &id
);
123 * If rec == NULL there's not much we can do about it
127 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
132 status
= dbwrap_record_delete(rec
);
137 /*******************************************************************
138 Pull a security descriptor into a DATA_BLOB from a tdb store.
139 *******************************************************************/
141 static NTSTATUS
get_acl_blob(TALLOC_CTX
*ctx
,
142 vfs_handle_struct
*handle
,
144 const struct smb_filename
*smb_fname
,
150 struct db_context
*db
= acl_db
;
151 NTSTATUS status
= NT_STATUS_OK
;
152 SMB_STRUCT_STAT sbuf
;
157 status
= vfs_stat_fsp(fsp
);
158 sbuf
= fsp
->fsp_name
->st
;
160 int ret
= vfs_stat_smb_basename(handle
->conn
,
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
);
177 status
= dbwrap_fetch(db
,
179 make_tdb_data(id_buf
, sizeof(id_buf
)),
181 if (!NT_STATUS_IS_OK(status
)) {
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
, smb_fname
->base_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
= dbwrap_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 dbwrap_record_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
;
247 smb_fname_tmp
= cp_smb_filename_nostream(talloc_tos(), smb_fname
);
248 if (smb_fname_tmp
== NULL
) {
253 if (smb_fname_tmp
->flags
& SMB_FILENAME_POSIX_PATH
) {
254 ret
= SMB_VFS_LSTAT(handle
->conn
, smb_fname_tmp
);
256 ret
= SMB_VFS_STAT(handle
->conn
, smb_fname_tmp
);
263 ret
= unlink_acl_common(handle
, smb_fname_tmp
);
269 acl_tdb_delete(handle
, db
, &smb_fname_tmp
->st
);
274 /*********************************************************************
275 On rmdir we need to delete the tdb record (if using tdb).
276 *********************************************************************/
278 static int rmdir_acl_tdb(vfs_handle_struct
*handle
,
279 const struct smb_filename
*smb_fname
)
282 SMB_STRUCT_STAT sbuf
;
283 struct db_context
*db
= acl_db
;
286 ret
= vfs_stat_smb_basename(handle
->conn
, smb_fname
, &sbuf
);
291 ret
= rmdir_acl_common(handle
, smb_fname
);
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
);
310 struct acl_common_config
*config
= NULL
;
316 if (!acl_tdb_init()) {
317 SMB_VFS_NEXT_DISCONNECT(handle
);
321 ok
= init_acl_common_config(handle
, ACL_MODULE_NAME
);
323 DBG_ERR("init_acl_common_config failed\n");
327 /* Ensure we have the parameters correct if we're
328 * using this module. */
329 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
330 "'dos filemode = true' and "
331 "'force unknown acl user = true' for service %s\n",
334 lp_do_parameter(SNUM(handle
->conn
), "inherit acls", "true");
335 lp_do_parameter(SNUM(handle
->conn
), "dos filemode", "true");
336 lp_do_parameter(SNUM(handle
->conn
), "force unknown acl user", "true");
338 SMB_VFS_HANDLE_GET_DATA(handle
, config
,
339 struct acl_common_config
,
342 if (config
->ignore_system_acls
) {
343 mode_t create_mask
= lp_create_mask(SNUM(handle
->conn
));
344 char *create_mask_str
= NULL
;
346 if ((create_mask
& 0666) != 0666) {
348 create_mask_str
= talloc_asprintf(handle
, "0%o",
350 if (create_mask_str
== NULL
) {
351 DBG_ERR("talloc_asprintf failed\n");
355 DBG_NOTICE("setting 'create mask = %s'\n", create_mask_str
);
357 lp_do_parameter (SNUM(handle
->conn
),
358 "create mask", create_mask_str
);
360 TALLOC_FREE(create_mask_str
);
363 DBG_NOTICE("setting 'directory mask = 0777', "
364 "'store dos attributes = yes' and all "
365 "'map ...' options to 'no'\n");
367 lp_do_parameter(SNUM(handle
->conn
), "directory mask", "0777");
368 lp_do_parameter(SNUM(handle
->conn
), "map archive", "no");
369 lp_do_parameter(SNUM(handle
->conn
), "map hidden", "no");
370 lp_do_parameter(SNUM(handle
->conn
), "map readonly", "no");
371 lp_do_parameter(SNUM(handle
->conn
), "map system", "no");
372 lp_do_parameter(SNUM(handle
->conn
), "store dos attributes",
379 /*********************************************************************
380 Remove a Windows ACL - we're setting the underlying POSIX ACL.
381 *********************************************************************/
383 static int sys_acl_set_file_tdb(vfs_handle_struct
*handle
,
384 const struct smb_filename
*smb_fname_in
,
388 struct db_context
*db
= acl_db
;
391 struct smb_filename
*smb_fname
= NULL
;
393 smb_fname
= cp_smb_filename_nostream(talloc_tos(), smb_fname_in
);
394 if (smb_fname
== NULL
) {
398 ret
= SMB_VFS_STAT(handle
->conn
, smb_fname
);
404 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle
,
413 acl_tdb_delete(handle
, db
, &smb_fname
->st
);
416 TALLOC_FREE(smb_fname
);
418 if (saved_errno
!= 0) {
424 /*********************************************************************
425 Remove a Windows ACL - we're setting the underlying POSIX ACL.
426 *********************************************************************/
428 static int sys_acl_set_fd_tdb(vfs_handle_struct
*handle
,
432 struct db_context
*db
= acl_db
;
436 status
= vfs_stat_fsp(fsp
);
437 if (!NT_STATUS_IS_OK(status
)) {
441 ret
= SMB_VFS_NEXT_SYS_ACL_SET_FD(handle
,
448 acl_tdb_delete(handle
, db
, &fsp
->fsp_name
->st
);
452 static NTSTATUS
acl_tdb_fget_nt_acl(vfs_handle_struct
*handle
,
454 uint32_t security_info
,
456 struct security_descriptor
**ppdesc
)
459 status
= get_nt_acl_common(get_acl_blob
, handle
, fsp
, NULL
,
460 security_info
, mem_ctx
, ppdesc
);
464 static NTSTATUS
acl_tdb_get_nt_acl(vfs_handle_struct
*handle
,
465 const struct smb_filename
*smb_fname
,
466 uint32_t security_info
,
468 struct security_descriptor
**ppdesc
)
471 status
= get_nt_acl_common(get_acl_blob
, handle
, NULL
, smb_fname
,
472 security_info
, mem_ctx
, ppdesc
);
476 static NTSTATUS
acl_tdb_fset_nt_acl(vfs_handle_struct
*handle
,
478 uint32_t security_info_sent
,
479 const struct security_descriptor
*psd
)
482 status
= fset_nt_acl_common(get_acl_blob
, store_acl_blob_fsp
,
484 handle
, fsp
, security_info_sent
, psd
);
488 static struct vfs_fn_pointers vfs_acl_tdb_fns
= {
489 .connect_fn
= connect_acl_tdb
,
490 .disconnect_fn
= disconnect_acl_tdb
,
491 .rmdir_fn
= rmdir_acl_tdb
,
492 .unlink_fn
= unlink_acl_tdb
,
493 .chmod_fn
= chmod_acl_module_common
,
494 .fchmod_fn
= fchmod_acl_module_common
,
495 .fget_nt_acl_fn
= acl_tdb_fget_nt_acl
,
496 .get_nt_acl_fn
= acl_tdb_get_nt_acl
,
497 .fset_nt_acl_fn
= acl_tdb_fset_nt_acl
,
498 .sys_acl_set_file_fn
= sys_acl_set_file_tdb
,
499 .sys_acl_set_fd_fn
= sys_acl_set_fd_tdb
503 NTSTATUS
vfs_acl_tdb_init(TALLOC_CTX
*ctx
)
505 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION
, "acl_tdb",