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/>.
21 /* NOTE: This is an experimental module, not yet finished. JRA. */
24 #include "librpc/gen_ndr/xattr.h"
25 #include "librpc/gen_ndr/ndr_xattr.h"
26 #include "../lib/crypto/crypto.h"
30 #define DBGC_CLASS DBGC_VFS
32 #include "modules/vfs_acl_common.c"
34 static unsigned int ref_count;
35 static struct db_context *acl_db;
37 /*******************************************************************
38 Open acl_db if not already open, increment ref count.
39 *******************************************************************/
41 static bool acl_tdb_init(void)
50 dbname = state_path("file_ntacls.tdb");
58 acl_db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
76 /*******************************************************************
77 Lower ref count and close acl_db if zero.
78 *******************************************************************/
80 static void disconnect_acl_tdb(struct vfs_handle_struct *handle)
82 SMB_VFS_NEXT_DISCONNECT(handle);
89 /*******************************************************************
90 Fetch_lock the tdb acl record for a file
91 *******************************************************************/
93 static struct db_record *acl_tdb_lock(TALLOC_CTX *mem_ctx,
94 struct db_context *db,
95 const struct file_id *id)
99 /* For backwards compatibility only store the dev/inode. */
100 push_file_id_16((char *)id_buf, id);
101 return db->fetch_locked(db,
103 make_tdb_data(id_buf,
107 /*******************************************************************
108 Delete the tdb acl record for a file
109 *******************************************************************/
111 static NTSTATUS acl_tdb_delete(vfs_handle_struct *handle,
112 struct db_context *db,
113 SMB_STRUCT_STAT *psbuf)
116 struct file_id id = vfs_file_id_from_sbuf(handle->conn, psbuf);
117 struct db_record *rec = acl_tdb_lock(talloc_tos(), db, &id);
120 * If rec == NULL there's not much we can do about it
124 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
129 status = rec->delete_rec(rec);
134 /*******************************************************************
135 Pull a security descriptor into a DATA_BLOB from a tdb store.
136 *******************************************************************/
138 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
139 vfs_handle_struct *handle,
147 struct db_context *db = acl_db;
148 NTSTATUS status = NT_STATUS_OK;
149 SMB_STRUCT_STAT sbuf;
154 status = vfs_stat_fsp(fsp);
155 sbuf = fsp->fsp_name->st;
157 int ret = vfs_stat_smb_fname(handle->conn, name, &sbuf);
159 status = map_nt_error_from_unix(errno);
163 if (!NT_STATUS_IS_OK(status)) {
167 id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
169 /* For backwards compatibility only store the dev/inode. */
170 push_file_id_16((char *)id_buf, &id);
174 make_tdb_data(id_buf, sizeof(id_buf)),
176 return NT_STATUS_INTERNAL_DB_CORRUPTION;
179 pblob->data = data.dptr;
180 pblob->length = data.dsize;
182 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
183 (unsigned int)data.dsize, name ));
185 if (pblob->length == 0 || pblob->data == NULL) {
186 return NT_STATUS_NOT_FOUND;
191 /*******************************************************************
192 Store a DATA_BLOB into a tdb record given an fsp pointer.
193 *******************************************************************/
195 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
202 struct db_context *db = acl_db;
203 struct db_record *rec;
206 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
207 (unsigned int)pblob->length, fsp_str_dbg(fsp)));
209 status = vfs_stat_fsp(fsp);
210 if (!NT_STATUS_IS_OK(status)) {
214 id = vfs_file_id_from_sbuf(handle->conn, &fsp->fsp_name->st);
216 /* For backwards compatibility only store the dev/inode. */
217 push_file_id_16((char *)id_buf, &id);
218 rec = db->fetch_locked(db, talloc_tos(),
219 make_tdb_data(id_buf,
222 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
223 return NT_STATUS_INTERNAL_DB_CORRUPTION;
225 data.dptr = pblob->data;
226 data.dsize = pblob->length;
227 return rec->store(rec, data, 0);
230 /*********************************************************************
231 On unlink we need to delete the tdb record (if using tdb).
232 *********************************************************************/
234 static int unlink_acl_tdb(vfs_handle_struct *handle,
235 const struct smb_filename *smb_fname)
237 struct smb_filename *smb_fname_tmp = NULL;
238 struct db_context *db = acl_db;
242 status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
243 if (!NT_STATUS_IS_OK(status)) {
244 errno = map_errno_from_nt_status(status);
248 if (lp_posix_pathnames()) {
249 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
251 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
258 ret = unlink_acl_common(handle, smb_fname_tmp);
264 acl_tdb_delete(handle, db, &smb_fname_tmp->st);
269 /*********************************************************************
270 On rmdir we need to delete the tdb record (if using tdb).
271 *********************************************************************/
273 static int rmdir_acl_tdb(vfs_handle_struct *handle, const char *path)
276 SMB_STRUCT_STAT sbuf;
277 struct db_context *db = acl_db;
280 if (lp_posix_pathnames()) {
281 ret = vfs_lstat_smb_fname(handle->conn, path, &sbuf);
283 ret = vfs_stat_smb_fname(handle->conn, path, &sbuf);
290 ret = rmdir_acl_common(handle, path);
295 acl_tdb_delete(handle, db, &sbuf);
299 /*******************************************************************
300 Handle opening the storage tdb if so configured.
301 *******************************************************************/
303 static int connect_acl_tdb(struct vfs_handle_struct *handle,
307 int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
313 if (!acl_tdb_init()) {
314 SMB_VFS_NEXT_DISCONNECT(handle);
318 /* Ensure we have "inherit acls = yes" if we're
319 * using this module. */
320 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
321 "and 'dos filemode = 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");
329 /*********************************************************************
330 Remove a Windows ACL - we're setting the underlying POSIX ACL.
331 *********************************************************************/
333 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
338 SMB_STRUCT_STAT sbuf;
339 struct db_context *db = acl_db;
342 if (lp_posix_pathnames()) {
343 ret = vfs_lstat_smb_fname(handle->conn, path, &sbuf);
345 ret = vfs_stat_smb_fname(handle->conn, path, &sbuf);
352 ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
360 acl_tdb_delete(handle, db, &sbuf);
364 /*********************************************************************
365 Remove a Windows ACL - we're setting the underlying POSIX ACL.
366 *********************************************************************/
368 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
372 struct db_context *db = acl_db;
376 status = vfs_stat_fsp(fsp);
377 if (!NT_STATUS_IS_OK(status)) {
381 ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
388 acl_tdb_delete(handle, db, &fsp->fsp_name->st);
392 static struct vfs_fn_pointers vfs_acl_tdb_fns = {
393 .connect_fn = connect_acl_tdb,
394 .disconnect = disconnect_acl_tdb,
395 .opendir = opendir_acl_common,
396 .mkdir = mkdir_acl_common,
397 .open = open_acl_common,
398 .create_file = create_file_acl_common,
399 .unlink = unlink_acl_tdb,
400 .rmdir = rmdir_acl_tdb,
401 .fget_nt_acl = fget_nt_acl_common,
402 .get_nt_acl = get_nt_acl_common,
403 .fset_nt_acl = fset_nt_acl_common,
404 .sys_acl_set_file = sys_acl_set_file_tdb,
405 .sys_acl_set_fd = sys_acl_set_fd_tdb
408 NTSTATUS vfs_acl_tdb_init(void)
410 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb",