[qemu.git] / block / backup-top.h

/*
 * backup-top filter driver
 *
 * The driver performs Copy-Before-Write (CBW) operation: it is injected above
 * some node, and before each write it copies _old_ data to the target node.
 *
 * Copyright (c) 2018-2019 Virtuozzo International GmbH.
 *
 * Author:
 *  Sementsov-Ogievskiy Vladimir <[email protected]>
 *
 * 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 2 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 BACKUP_TOP_H
#define BACKUP_TOP_H

#include "block/block_int.h"
#include "block/block-copy.h"

BlockDriverState *bdrv_backup_top_append(BlockDriverState *source,
                                         BlockDriverState *target,
                                         const char *filter_node_name,
                                         uint64_t cluster_size,
                                         BdrvRequestFlags write_flags,
                                         BlockCopyState **bcs,
                                         Error **errp);
void bdrv_backup_top_drop(BlockDriverState *bs);

#endif /* BACKUP_TOP_H */
Commit	Line	Data
7df7868b VSO	1	/*
	2	* backup-top filter driver
	3	*
	4	* The driver performs Copy-Before-Write (CBW) operation: it is injected above
	5	* some node, and before each write it copies _old_ data to the target node.
	6	*
	7	* Copyright (c) 2018-2019 Virtuozzo International GmbH.
	8	*
	9	* Author:
	10	* Sementsov-Ogievskiy Vladimir <[email protected]>
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or
	15	* (at your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	24	*/
	25
	26	#ifndef BACKUP_TOP_H
	27	#define BACKUP_TOP_H
	28
	29	#include "block/block_int.h"
	30	#include "block/block-copy.h"
	31
	32	BlockDriverState bdrv_backup_top_append(BlockDriverState source,
	33	BlockDriverState *target,
	34	const char *filter_node_name,
	35	uint64_t cluster_size,
	36	BdrvRequestFlags write_flags,
	37	BlockCopyState **bcs,
	38	Error **errp);
	39	void bdrv_backup_top_drop(BlockDriverState *bs);
	40
	41	#endif /* BACKUP_TOP_H */