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 Delete the tdb acl record for a file
94 *******************************************************************/
96 static NTSTATUS acl_tdb_delete(vfs_handle_struct *handle,
97 struct db_context *db,
98 SMB_STRUCT_STAT *psbuf)
101 struct file_id id = vfs_file_id_from_sbuf(handle->conn, psbuf);
104 /* For backwards compatibility only store the dev/inode. */
105 push_file_id_16((char *)id_buf, &id);
107 status = dbwrap_delete(db, make_tdb_data(id_buf, sizeof(id_buf)));
111 /*******************************************************************
112 Pull a security descriptor from an fsp into a DATA_BLOB from a tdb store.
113 *******************************************************************/
115 static NTSTATUS fget_acl_blob(TALLOC_CTX *ctx,
116 vfs_handle_struct *handle,
123 struct db_context *db = acl_db;
124 NTSTATUS status = NT_STATUS_OK;
126 status = vfs_stat_fsp(fsp);
127 if (!NT_STATUS_IS_OK(status)) {
131 id = vfs_file_id_from_sbuf(handle->conn, &fsp->fsp_name->st);
133 /* For backwards compatibility only store the dev/inode. */
134 push_file_id_16((char *)id_buf, &id);
136 status = dbwrap_fetch(db,
138 make_tdb_data(id_buf, sizeof(id_buf)),
140 if (!NT_STATUS_IS_OK(status)) {
141 return NT_STATUS_INTERNAL_DB_CORRUPTION;
144 pblob->data = data.dptr;
145 pblob->length = data.dsize;
147 DBG_DEBUG("returned %u bytes from file %s\n",
148 (unsigned int)data.dsize,
151 if (pblob->length == 0 || pblob->data == NULL) {
152 return NT_STATUS_NOT_FOUND;
157 /*******************************************************************
158 Pull a security descriptor into a DATA_BLOB from a tdb store.
159 *******************************************************************/
161 static NTSTATUS get_acl_blob_at(TALLOC_CTX *ctx,
162 vfs_handle_struct *handle,
163 struct files_struct *dirfsp,
164 const struct smb_filename *smb_fname,
170 struct db_context *db = acl_db;
171 NTSTATUS status = NT_STATUS_OK;
172 SMB_STRUCT_STAT sbuf;
177 ret = vfs_stat_smb_basename(handle->conn,
181 status = map_nt_error_from_unix(errno);
184 if (!NT_STATUS_IS_OK(status)) {
188 id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
190 /* For backwards compatibility only store the dev/inode. */
191 push_file_id_16((char *)id_buf, &id);
193 status = dbwrap_fetch(db,
195 make_tdb_data(id_buf, sizeof(id_buf)),
197 if (!NT_STATUS_IS_OK(status)) {
198 return NT_STATUS_INTERNAL_DB_CORRUPTION;
201 pblob->data = data.dptr;
202 pblob->length = data.dsize;
204 DBG_DEBUG("returned %u bytes from file %s\n",
205 (unsigned int)data.dsize, smb_fname->base_name );
207 if (pblob->length == 0 || pblob->data == NULL) {
208 return NT_STATUS_NOT_FOUND;
213 /*******************************************************************
214 Store a DATA_BLOB into a tdb record given an fsp pointer.
215 *******************************************************************/
217 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
223 TDB_DATA data = { .dptr = pblob->data, .dsize = pblob->length };
224 struct db_context *db = acl_db;
227 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
228 (unsigned int)pblob->length, fsp_str_dbg(fsp)));
230 status = vfs_stat_fsp(fsp);
231 if (!NT_STATUS_IS_OK(status)) {
235 id = vfs_file_id_from_sbuf(handle->conn, &fsp->fsp_name->st);
237 /* For backwards compatibility only store the dev/inode. */
238 push_file_id_16((char *)id_buf, &id);
240 status = dbwrap_store(
241 db, make_tdb_data(id_buf, sizeof(id_buf)), data, 0);
245 /*********************************************************************
246 On unlinkat we need to delete the tdb record (if using tdb).
247 *********************************************************************/
249 static int unlinkat_acl_tdb(vfs_handle_struct *handle,
250 struct files_struct *dirfsp,
251 const struct smb_filename *smb_fname,
254 struct smb_filename *smb_fname_tmp = NULL;
255 struct db_context *db = acl_db;
258 smb_fname_tmp = cp_smb_filename_nostream(talloc_tos(), smb_fname);
259 if (smb_fname_tmp == NULL) {
264 ret = vfs_stat(handle->conn, smb_fname_tmp);
269 if (flags & AT_REMOVEDIR) {
270 ret = rmdir_acl_common(handle,
274 ret = unlink_acl_common(handle,
284 acl_tdb_delete(handle, db, &smb_fname_tmp->st);
289 /*******************************************************************
290 Handle opening the storage tdb if so configured.
291 *******************************************************************/
293 static int connect_acl_tdb(struct vfs_handle_struct *handle,
297 int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
299 struct acl_common_config *config = NULL;
305 if (!acl_tdb_init()) {
306 SMB_VFS_NEXT_DISCONNECT(handle);
310 ok = init_acl_common_config(handle, ACL_MODULE_NAME);
312 DBG_ERR("init_acl_common_config failed\n");
316 /* Ensure we have the parameters correct if we're
317 * using this module. */
318 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
319 "'dos filemode = true' and "
320 "'force unknown acl user = true' for service %s\n",
323 lp_do_parameter(SNUM(handle->conn), "inherit acls", "true");
324 lp_do_parameter(SNUM(handle->conn), "dos filemode", "true");
325 lp_do_parameter(SNUM(handle->conn), "force unknown acl user", "true");
327 SMB_VFS_HANDLE_GET_DATA(handle, config,
328 struct acl_common_config,
331 if (config->ignore_system_acls) {
332 mode_t create_mask = lp_create_mask(SNUM(handle->conn));
333 char *create_mask_str = NULL;
335 if ((create_mask & 0666) != 0666) {
337 create_mask_str = talloc_asprintf(handle, "0%o",
339 if (create_mask_str == NULL) {
340 DBG_ERR("talloc_asprintf failed\n");
344 DBG_NOTICE("setting 'create mask = %s'\n", create_mask_str);
346 lp_do_parameter (SNUM(handle->conn),
347 "create mask", create_mask_str);
349 TALLOC_FREE(create_mask_str);
352 DBG_NOTICE("setting 'directory mask = 0777', "
353 "'store dos attributes = yes' and all "
354 "'map ...' options to 'no'\n");
356 lp_do_parameter(SNUM(handle->conn), "directory mask", "0777");
357 lp_do_parameter(SNUM(handle->conn), "map archive", "no");
358 lp_do_parameter(SNUM(handle->conn), "map hidden", "no");
359 lp_do_parameter(SNUM(handle->conn), "map readonly", "no");
360 lp_do_parameter(SNUM(handle->conn), "map system", "no");
361 lp_do_parameter(SNUM(handle->conn), "store dos attributes",
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,
377 struct db_context *db = acl_db;
381 status = vfs_stat_fsp(fsp);
382 if (!NT_STATUS_IS_OK(status)) {
386 ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
394 acl_tdb_delete(handle, db, &fsp->fsp_name->st);
398 static NTSTATUS acl_tdb_fget_nt_acl(vfs_handle_struct *handle,
400 uint32_t security_info,
402 struct security_descriptor **ppdesc)
405 status = fget_nt_acl_common(fget_acl_blob, handle, fsp,
406 security_info, mem_ctx, ppdesc);
410 static NTSTATUS acl_tdb_get_nt_acl_at(vfs_handle_struct *handle,
411 struct files_struct *dirfsp,
412 const struct smb_filename *smb_fname,
413 uint32_t security_info,
415 struct security_descriptor **ppdesc)
418 status = get_nt_acl_common_at(get_acl_blob_at,
429 static NTSTATUS acl_tdb_fset_nt_acl(vfs_handle_struct *handle,
431 uint32_t security_info_sent,
432 const struct security_descriptor *psd)
435 status = fset_nt_acl_common(fget_acl_blob, store_acl_blob_fsp,
437 handle, fsp, security_info_sent, psd);
441 static struct vfs_fn_pointers vfs_acl_tdb_fns = {
442 .connect_fn = connect_acl_tdb,
443 .disconnect_fn = disconnect_acl_tdb,
444 .unlinkat_fn = unlinkat_acl_tdb,
445 .chmod_fn = chmod_acl_module_common,
446 .fchmod_fn = fchmod_acl_module_common,
447 .fget_nt_acl_fn = acl_tdb_fget_nt_acl,
448 .get_nt_acl_at_fn = acl_tdb_get_nt_acl_at,
449 .fset_nt_acl_fn = acl_tdb_fset_nt_acl,
450 .sys_acl_set_fd_fn = sys_acl_set_fd_tdb
454 NTSTATUS vfs_acl_tdb_init(TALLOC_CTX *ctx)
456 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb",