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/*
* 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.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__ */
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