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 into a DATA_BLOB from a tdb store.
113 *******************************************************************/
115 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
116 vfs_handle_struct *handle,
118 const struct smb_filename *smb_fname,
124 struct db_context *db = acl_db;
125 NTSTATUS status = NT_STATUS_OK;
126 SMB_STRUCT_STAT sbuf;
131 status = vfs_stat_fsp(fsp);
132 sbuf = fsp->fsp_name->st;
134 int ret = vfs_stat_smb_basename(handle->conn,
138 status = map_nt_error_from_unix(errno);
142 if (!NT_STATUS_IS_OK(status)) {
146 id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
148 /* For backwards compatibility only store the dev/inode. */
149 push_file_id_16((char *)id_buf, &id);
151 status = dbwrap_fetch(db,
153 make_tdb_data(id_buf, sizeof(id_buf)),
155 if (!NT_STATUS_IS_OK(status)) {
156 return NT_STATUS_INTERNAL_DB_CORRUPTION;
159 pblob->data = data.dptr;
160 pblob->length = data.dsize;
162 DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
163 (unsigned int)data.dsize, smb_fname->base_name ));
165 if (pblob->length == 0 || pblob->data == NULL) {
166 return NT_STATUS_NOT_FOUND;
171 /*******************************************************************
172 Store a DATA_BLOB into a tdb record given an fsp pointer.
173 *******************************************************************/
175 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
181 TDB_DATA data = { .dptr = pblob->data, .dsize = pblob->length };
182 struct db_context *db = acl_db;
185 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
186 (unsigned int)pblob->length, fsp_str_dbg(fsp)));
188 status = vfs_stat_fsp(fsp);
189 if (!NT_STATUS_IS_OK(status)) {
193 id = vfs_file_id_from_sbuf(handle->conn, &fsp->fsp_name->st);
195 /* For backwards compatibility only store the dev/inode. */
196 push_file_id_16((char *)id_buf, &id);
198 status = dbwrap_store(
199 db, make_tdb_data(id_buf, sizeof(id_buf)), data, 0);
203 /*********************************************************************
204 On unlinkat we need to delete the tdb record (if using tdb).
205 *********************************************************************/
207 static int unlinkat_acl_tdb(vfs_handle_struct *handle,
208 struct files_struct *dirfsp,
209 const struct smb_filename *smb_fname,
212 struct smb_filename *smb_fname_tmp = NULL;
213 struct db_context *db = acl_db;
216 smb_fname_tmp = cp_smb_filename_nostream(talloc_tos(), smb_fname);
217 if (smb_fname_tmp == NULL) {
222 if (smb_fname_tmp->flags & SMB_FILENAME_POSIX_PATH) {
223 ret = SMB_VFS_LSTAT(handle->conn, smb_fname_tmp);
225 ret = SMB_VFS_STAT(handle->conn, smb_fname_tmp);
232 if (flags & AT_REMOVEDIR) {
233 ret = rmdir_acl_common(handle,
237 ret = unlink_acl_common(handle,
247 acl_tdb_delete(handle, db, &smb_fname_tmp->st);
252 /*******************************************************************
253 Handle opening the storage tdb if so configured.
254 *******************************************************************/
256 static int connect_acl_tdb(struct vfs_handle_struct *handle,
260 int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
262 struct acl_common_config *config = NULL;
268 if (!acl_tdb_init()) {
269 SMB_VFS_NEXT_DISCONNECT(handle);
273 ok = init_acl_common_config(handle, ACL_MODULE_NAME);
275 DBG_ERR("init_acl_common_config failed\n");
279 /* Ensure we have the parameters correct if we're
280 * using this module. */
281 DEBUG(2,("connect_acl_tdb: setting 'inherit acls = true' "
282 "'dos filemode = true' and "
283 "'force unknown acl user = true' for service %s\n",
286 lp_do_parameter(SNUM(handle->conn), "inherit acls", "true");
287 lp_do_parameter(SNUM(handle->conn), "dos filemode", "true");
288 lp_do_parameter(SNUM(handle->conn), "force unknown acl user", "true");
290 SMB_VFS_HANDLE_GET_DATA(handle, config,
291 struct acl_common_config,
294 if (config->ignore_system_acls) {
295 mode_t create_mask = lp_create_mask(SNUM(handle->conn));
296 char *create_mask_str = NULL;
298 if ((create_mask & 0666) != 0666) {
300 create_mask_str = talloc_asprintf(handle, "0%o",
302 if (create_mask_str == NULL) {
303 DBG_ERR("talloc_asprintf failed\n");
307 DBG_NOTICE("setting 'create mask = %s'\n", create_mask_str);
309 lp_do_parameter (SNUM(handle->conn),
310 "create mask", create_mask_str);
312 TALLOC_FREE(create_mask_str);
315 DBG_NOTICE("setting 'directory mask = 0777', "
316 "'store dos attributes = yes' and all "
317 "'map ...' options to 'no'\n");
319 lp_do_parameter(SNUM(handle->conn), "directory mask", "0777");
320 lp_do_parameter(SNUM(handle->conn), "map archive", "no");
321 lp_do_parameter(SNUM(handle->conn), "map hidden", "no");
322 lp_do_parameter(SNUM(handle->conn), "map readonly", "no");
323 lp_do_parameter(SNUM(handle->conn), "map system", "no");
324 lp_do_parameter(SNUM(handle->conn), "store dos attributes",
331 /*********************************************************************
332 Remove a Windows ACL - we're setting the underlying POSIX ACL.
333 *********************************************************************/
335 static int sys_acl_set_file_tdb(vfs_handle_struct *handle,
336 const struct smb_filename *smb_fname_in,
340 struct db_context *db = acl_db;
343 struct smb_filename *smb_fname = NULL;
345 smb_fname = cp_smb_filename_nostream(talloc_tos(), smb_fname_in);
346 if (smb_fname == NULL) {
350 ret = SMB_VFS_STAT(handle->conn, smb_fname);
356 ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
365 acl_tdb_delete(handle, db, &smb_fname->st);
368 TALLOC_FREE(smb_fname);
370 if (saved_errno != 0) {
376 /*********************************************************************
377 Remove a Windows ACL - we're setting the underlying POSIX ACL.
378 *********************************************************************/
380 static int sys_acl_set_fd_tdb(vfs_handle_struct *handle,
384 struct db_context *db = acl_db;
388 status = vfs_stat_fsp(fsp);
389 if (!NT_STATUS_IS_OK(status)) {
393 ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
400 acl_tdb_delete(handle, db, &fsp->fsp_name->st);
404 static NTSTATUS acl_tdb_fget_nt_acl(vfs_handle_struct *handle,
406 uint32_t security_info,
408 struct security_descriptor **ppdesc)
411 status = get_nt_acl_common(get_acl_blob, handle, fsp, NULL,
412 security_info, mem_ctx, ppdesc);
416 static NTSTATUS acl_tdb_get_nt_acl(vfs_handle_struct *handle,
417 const struct smb_filename *smb_fname,
418 uint32_t security_info,
420 struct security_descriptor **ppdesc)
423 status = get_nt_acl_common(get_acl_blob, handle, NULL, smb_fname,
424 security_info, mem_ctx, ppdesc);
428 static NTSTATUS acl_tdb_fset_nt_acl(vfs_handle_struct *handle,
430 uint32_t security_info_sent,
431 const struct security_descriptor *psd)
434 status = fset_nt_acl_common(get_acl_blob, store_acl_blob_fsp,
436 handle, fsp, security_info_sent, psd);
440 static struct vfs_fn_pointers vfs_acl_tdb_fns = {
441 .connect_fn = connect_acl_tdb,
442 .disconnect_fn = disconnect_acl_tdb,
443 .unlinkat_fn = unlinkat_acl_tdb,
444 .chmod_fn = chmod_acl_module_common,
445 .fchmod_fn = fchmod_acl_module_common,
446 .fget_nt_acl_fn = acl_tdb_fget_nt_acl,
447 .get_nt_acl_fn = acl_tdb_get_nt_acl,
448 .fset_nt_acl_fn = acl_tdb_fset_nt_acl,
449 .sys_acl_set_file_fn = sys_acl_set_file_tdb,
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",