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 "librpc/gen_ndr/ndr_xattr.h"
26 #include "../lib/crypto/crypto.h"
27 #include "dbwrap/dbwrap.h"
28 #include "dbwrap/dbwrap_open.h"
33 #define DBGC_CLASS DBGC_VFS
35 #define ACL_MODULE_NAME "acl_tdb"
36 #include "modules/vfs_acl_common.c"
38 static unsigned int ref_count;
39 static struct db_context *acl_db;
41 /*******************************************************************
42 Open acl_db if not already open, increment ref count.
43 *******************************************************************/
45 static bool acl_tdb_init(void)
54 dbname = state_path("file_ntacls.tdb");
62 acl_db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
63 DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
81 /*******************************************************************
82 Lower ref count and close acl_db if zero.
83 *******************************************************************/
85 static void disconnect_acl_tdb(struct vfs_handle_struct *handle)
87 SMB_VFS_NEXT_DISCONNECT(handle);
94 /*******************************************************************
95 Fetch_lock the tdb acl record for a file
96 *******************************************************************/
98 static struct db_record *acl_tdb_lock(TALLOC_CTX *mem_ctx,
99 struct db_context *db,
100 const struct file_id *id)
104 /* For backwards compatibility only store the dev/inode. */
105 push_file_id_16((char *)id_buf, id);
106 return dbwrap_fetch_locked(db,
108 make_tdb_data(id_buf,
112 /*******************************************************************
113 Delete the tdb acl record for a file
114 *******************************************************************/
116 static NTSTATUS acl_tdb_delete(vfs_handle_struct *handle,
117 struct db_context *db,
118 SMB_STRUCT_STAT *psbuf)
121 struct file_id id = vfs_file_id_from_sbuf(handle->conn, psbuf);
122 struct db_record *rec = acl_tdb_lock(talloc_tos(), db, &id);
125 * If rec == NULL there's not much we can do about it
129 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
134 status = dbwrap_record_delete(rec);
139 /*******************************************************************
140 Pull a security descriptor into a DATA_BLOB from a tdb store.
141 *******************************************************************/
143 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
144 vfs_handle_struct *handle,
152 struct db_context *db = acl_db;
153 NTSTATUS status = NT_STATUS_OK;
154 SMB_STRUCT_STAT sbuf;
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);
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, 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(talloc_tos(), smb_fname);
248 if (smb_fname_tmp == NULL) {
253 if (lp_posix_pathnames()) {
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, const char *path)
281 SMB_STRUCT_STAT sbuf;
282 struct db_context *db = acl_db;
285 if (lp_posix_pathnames()) {
286 ret = vfs_lstat_smb_fname(handle->conn, path, &sbuf);
288 ret = vfs_stat_smb_fname(handle->conn, path, &sbuf);
295 ret = rmdir_acl_common(handle, path);
300 acl_tdb_delete(handle, db, &sbuf);
304 /*******************************************************************
305 Handle opening the storage tdb if so configured.
306 *******************************************************************/
308 static int connect_acl_tdb(struct vfs_handle_struct *handle,
312 int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
318 if (!acl_tdb_init()) {
319 SMB_VFS_NEXT_DISCONNECT(handle);
323 /* Ensure we have the parameters correct if we're
324 * using this module. */
325 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
326 "'dos filemode = true' and "
327 "'force unknown acl user = true' for service %s\n",
330 lp_do_parameter(SNUM(handle->conn), "inherit acls", "true");
331 lp_do_parameter(SNUM(handle->conn), "dos filemode", "true");
332 lp_do_parameter(SNUM(handle->conn), "force unknown acl user", "true");
337 /*********************************************************************
338 Remove a Windows ACL - we're setting the underlying POSIX ACL.
339 *********************************************************************/
341 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
346 SMB_STRUCT_STAT sbuf;
347 struct db_context *db = acl_db;
350 if (lp_posix_pathnames()) {
351 ret = vfs_lstat_smb_fname(handle->conn, path, &sbuf);
353 ret = vfs_stat_smb_fname(handle->conn, path, &sbuf);
360 ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
368 acl_tdb_delete(handle, db, &sbuf);
372 /*********************************************************************
373 Remove a Windows ACL - we're setting the underlying POSIX ACL.
374 *********************************************************************/
376 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
380 struct db_context *db = acl_db;
384 status = vfs_stat_fsp(fsp);
385 if (!NT_STATUS_IS_OK(status)) {
389 ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
396 acl_tdb_delete(handle, db, &fsp->fsp_name->st);
400 static struct vfs_fn_pointers vfs_acl_tdb_fns = {
401 .connect_fn = connect_acl_tdb,
402 .disconnect_fn = disconnect_acl_tdb,
403 .rmdir_fn = rmdir_acl_tdb,
404 .unlink_fn = unlink_acl_tdb,
405 .chmod_fn = chmod_acl_module_common,
406 .fchmod_fn = fchmod_acl_module_common,
407 .fget_nt_acl_fn = fget_nt_acl_common,
408 .get_nt_acl_fn = get_nt_acl_common,
409 .fset_nt_acl_fn = fset_nt_acl_common,
410 .chmod_acl_fn = chmod_acl_acl_module_common,
411 .fchmod_acl_fn = fchmod_acl_acl_module_common,
412 .sys_acl_set_file_fn = sys_acl_set_file_tdb,
413 .sys_acl_set_fd_fn = sys_acl_set_fd_tdb
416 NTSTATUS vfs_acl_tdb_init(void)
418 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb",