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);
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,
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_fname(handle->conn, name, &sbuf);
163 status = map_nt_error_from_unix(errno);
167 if (!NT_STATUS_IS_OK(status)) {
171 id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
173 /* For backwards compatibility only store the dev/inode. */
174 push_file_id_16((char *)id_buf, &id);
176 status = dbwrap_fetch(db,
178 make_tdb_data(id_buf, sizeof(id_buf)),
180 if (!NT_STATUS_IS_OK(status)) {
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 = acl_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 status = vfs_stat_fsp(fsp);
215 if (!NT_STATUS_IS_OK(status)) {
219 id = vfs_file_id_from_sbuf(handle->conn, &fsp->fsp_name->st);
221 /* For backwards compatibility only store the dev/inode. */
222 push_file_id_16((char *)id_buf, &id);
223 rec = dbwrap_fetch_locked(db, talloc_tos(),
224 make_tdb_data(id_buf,
227 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
228 return NT_STATUS_INTERNAL_DB_CORRUPTION;
230 data.dptr = pblob->data;
231 data.dsize = pblob->length;
232 return dbwrap_record_store(rec, data, 0);
235 /*********************************************************************
236 On unlink we need to delete the tdb record (if using tdb).
237 *********************************************************************/
239 static int unlink_acl_tdb(vfs_handle_struct *handle,
240 const struct smb_filename *smb_fname)
242 struct smb_filename *smb_fname_tmp = NULL;
243 struct db_context *db = acl_db;
247 status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
248 if (!NT_STATUS_IS_OK(status)) {
249 errno = map_errno_from_nt_status(status);
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 = disconnect_acl_tdb,
403 .rmdir = rmdir_acl_tdb,
404 .unlink = unlink_acl_tdb,
405 .chmod = chmod_acl_module_common,
406 .fchmod = fchmod_acl_module_common,
407 .fget_nt_acl = fget_nt_acl_common,
408 .get_nt_acl = get_nt_acl_common,
409 .fset_nt_acl = fset_nt_acl_common,
410 .chmod_acl = chmod_acl_acl_module_common,
411 .fchmod_acl = fchmod_acl_acl_module_common,
412 .sys_acl_set_file = sys_acl_set_file_tdb,
413 .sys_acl_set_fd = sys_acl_set_fd_tdb
416 NTSTATUS vfs_acl_tdb_init(void)
418 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb",