/* * Unix SMB/CIFS implementation. * * A general tdb content validation mechanism * * Copyright (C) Michael Adam 2007 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __TDB_VALIDATE_H__ #define __TDB_VALIDATE_H__ #include "lib/replace/replace.h" #include "tdb_compat.h" /** * Flag field for keeping track of the status of a validation. */ struct tdb_validation_status { bool tdb_error; bool bad_freelist; bool bad_entry; bool unknown_key; bool success; }; /** * Callback function type for the validation mechanism. */ typedef int (*tdb_validate_data_func)(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf, void *state); /** * tdb validation function. * returns 0 if tdb is ok, != 0 if it isn't. * this function expects an opened tdb. */ int tdb_validate(struct tdb_context *tdb, tdb_validate_data_func validate_fn); /** * tdb validation function. * returns 0 if tdb is ok, != 0 if it isn't. * This is a wrapper around the actual validation function that * opens and closes the tdb. */ int tdb_validate_open(const char *tdb_path, tdb_validate_data_func validate_fn); /** * validation function with backup handling: * * - calls tdb_validate * - if the tdb is ok, create a backup "name.bak", possibly moving * existing backup to name.bak.old, * return 0 (success) even if the backup fails * - if the tdb is corrupt: * - move the tdb to "name.corrupt" * - check if there is valid backup. * if so, restore the backup. * if restore is successful, return 0 (success), * - otherwise return -1 (failure) */ int tdb_validate_and_backup(const char *tdb_path, tdb_validate_data_func validate_fn); #endif /* __TDB_VALIDATE_H__ */