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"
29 #define DBGC_CLASS DBGC_VFS
31 #include "modules/vfs_acl_common.c"
33 static unsigned int ref_count;
34 static struct db_context *acl_db;
36 /*******************************************************************
37 Open acl_db if not already open, increment ref count.
38 *******************************************************************/
40 static bool acl_tdb_init(struct db_context **pp_db)
50 dbname = state_path("file_ntacls.tdb");
58 *pp_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 free_acl_tdb_data(void **pptr)
82 struct db_context **pp_db = (struct db_context **)pptr;
91 /*******************************************************************
92 Fetch_lock the tdb acl record for a file
93 *******************************************************************/
95 static struct db_record *acl_tdb_lock(TALLOC_CTX *mem_ctx,
96 struct db_context *db,
97 const struct file_id *id)
101 /* For backwards compatibility only store the dev/inode. */
102 push_file_id_16((char *)id_buf, id);
103 return db->fetch_locked(db,
105 make_tdb_data(id_buf,
109 /*******************************************************************
110 Delete the tdb acl record for a file
111 *******************************************************************/
113 static NTSTATUS acl_tdb_delete(vfs_handle_struct *handle,
114 struct db_context *db,
115 SMB_STRUCT_STAT *psbuf)
118 struct file_id id = vfs_file_id_from_sbuf(handle->conn, psbuf);
119 struct db_record *rec = acl_tdb_lock(talloc_tos(), db, &id);
122 * If rec == NULL there's not much we can do about it
126 DEBUG(10,("acl_tdb_delete: rec == NULL\n"));
131 status = rec->delete_rec(rec);
136 /*******************************************************************
137 Pull a security descriptor into a DATA_BLOB from a tdb store.
138 *******************************************************************/
140 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
141 vfs_handle_struct *handle,
149 struct db_context *db;
151 SMB_STRUCT_STAT sbuf;
153 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
154 return NT_STATUS_INTERNAL_DB_CORRUPTION);
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);
179 make_tdb_data(id_buf, sizeof(id_buf)),
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_OBJECT_NAME_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;
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 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
215 return NT_STATUS_INTERNAL_DB_CORRUPTION);
217 status = vfs_stat_fsp(fsp);
218 if (!NT_STATUS_IS_OK(status)) {
222 id = vfs_file_id_from_sbuf(handle->conn, &fsp->fsp_name->st);
224 /* For backwards compatibility only store the dev/inode. */
225 push_file_id_16((char *)id_buf, &id);
226 rec = db->fetch_locked(db, talloc_tos(),
227 make_tdb_data(id_buf,
230 DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
231 return NT_STATUS_INTERNAL_DB_CORRUPTION;
233 data.dptr = pblob->data;
234 data.dsize = pblob->length;
235 return rec->store(rec, data, 0);
238 /*******************************************************************
239 Store a DATA_BLOB into a tdb record given a pathname.
240 *******************************************************************/
242 static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
249 SMB_STRUCT_STAT sbuf;
250 struct db_context *db;
251 struct db_record *rec;
254 DEBUG(10,("store_acl_blob_pathname: storing blob "
255 "length %u on file %s\n",
256 (unsigned int)pblob->length, fname));
258 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
259 return NT_STATUS_INTERNAL_DB_CORRUPTION);
261 if (lp_posix_pathnames()) {
262 ret = vfs_lstat_smb_fname(handle->conn, fname, &sbuf);
264 ret = vfs_stat_smb_fname(handle->conn, fname, &sbuf);
268 return map_nt_error_from_unix(errno);
271 id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
273 /* For backwards compatibility only store the dev/inode. */
274 push_file_id_16((char *)id_buf, &id);
276 rec = db->fetch_locked(db, talloc_tos(),
277 make_tdb_data(id_buf,
280 DEBUG(0, ("store_acl_blob_pathname_tdb: fetch_lock failed\n"));
281 return NT_STATUS_INTERNAL_DB_CORRUPTION;
283 data.dptr = pblob->data;
284 data.dsize = pblob->length;
285 return rec->store(rec, data, 0);
288 /*********************************************************************
289 On unlink we need to delete the tdb record (if using tdb).
290 *********************************************************************/
292 static int unlink_acl_tdb(vfs_handle_struct *handle,
293 const struct smb_filename *smb_fname)
295 struct smb_filename *smb_fname_tmp = NULL;
296 struct db_context *db;
300 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
302 status = copy_smb_filename(talloc_tos(), smb_fname, &smb_fname_tmp);
303 if (!NT_STATUS_IS_OK(status)) {
304 errno = map_errno_from_nt_status(status);
308 if (lp_posix_pathnames()) {
309 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
311 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
318 ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
324 acl_tdb_delete(handle, db, &smb_fname_tmp->st);
329 /*********************************************************************
330 On rmdir we need to delete the tdb record (if using tdb).
331 *********************************************************************/
333 static int rmdir_acl_tdb(vfs_handle_struct *handle, const char *path)
336 SMB_STRUCT_STAT sbuf;
337 struct db_context *db;
340 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
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_RMDIR(handle, path);
357 acl_tdb_delete(handle, db, &sbuf);
361 /*******************************************************************
362 Handle opening the storage tdb if so configured.
363 *******************************************************************/
365 static int connect_acl_tdb(struct vfs_handle_struct *handle,
369 struct db_context *db;
372 res = SMB_VFS_NEXT_CONNECT(handle, service, user);
377 if (!acl_tdb_init(&db)) {
378 SMB_VFS_NEXT_DISCONNECT(handle);
382 SMB_VFS_HANDLE_SET_DATA(handle, db, free_acl_tdb_data,
383 struct db_context, return -1);
388 /*********************************************************************
389 Remove a Windows ACL - we're setting the underlying POSIX ACL.
390 *********************************************************************/
392 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
397 SMB_STRUCT_STAT sbuf;
398 struct db_context *db;
401 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
403 if (lp_posix_pathnames()) {
404 ret = vfs_lstat_smb_fname(handle->conn, path, &sbuf);
406 ret = vfs_stat_smb_fname(handle->conn, path, &sbuf);
413 ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
421 acl_tdb_delete(handle, db, &sbuf);
425 /*********************************************************************
426 Remove a Windows ACL - we're setting the underlying POSIX ACL.
427 *********************************************************************/
429 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
433 struct db_context *db;
437 SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
439 status = vfs_stat_fsp(fsp);
440 if (!NT_STATUS_IS_OK(status)) {
444 ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
451 acl_tdb_delete(handle, db, &fsp->fsp_name->st);
455 static struct vfs_fn_pointers vfs_acl_tdb_fns = {
456 .connect_fn = connect_acl_tdb,
457 .mkdir = mkdir_acl_common,
458 .open = open_acl_common,
459 .unlink = unlink_acl_tdb,
460 .rmdir = rmdir_acl_tdb,
461 .fget_nt_acl = fget_nt_acl_common,
462 .get_nt_acl = get_nt_acl_common,
463 .fset_nt_acl = fset_nt_acl_common,
464 .sys_acl_set_file = sys_acl_set_file_tdb,
465 .sys_acl_set_fd = sys_acl_set_fd_tdb
468 NTSTATUS vfs_acl_tdb_init(void)
470 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb",