path: root/src/types.h

/*
 * This file is part of the Distributed Network Block Device 3
 *
 * Copyright(c) 2011-2012 Johann Latocha <johann@latocha.de>
 *
 * This file may be licensed under the terms of of the
 * GNU General Public License Version 2 (the ``GPL'').
 *
 * Software distributed under the License is distributed
 * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
 * express or implied. See the GPL for the specific language
 * governing rights and limitations.
 *
 * You should have received a copy of the GPL along with this
 * program. If not, go to http://www.gnu.org/licenses/gpl.html
 * or write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#ifndef TYPES_H_
#define TYPES_H_

#include "config.h"

// ioctl
#define DNBD3_MAGIC  'd'
#define IOCTL_SET_HOST	_IO(0xab, 1)
#define IOCTL_SET_PORT	_IO(0xab, 2)
#define IOCTL_SET_IMAGE	_IO(0xab, 3)
#define IOCTL_CONNECT	_IO(0xab, 4)

// network
#define CMD_GET_BLOCK   1
#define CMD_GET_SIZE    2

#pragma pack(1)
typedef struct dnbd3_request {
	uint16_t cmd;
	uint64_t offset;
	uint64_t size;
	char image_id[MAX_FILE_ID];
	char handle[8];
} dnbd3_request_t;
#pragma pack(0)

#pragma pack(1)
typedef struct dnbd3_reply {
	uint16_t cmd;
	uint64_t filesize;
	char handle[8];
} dnbd3_reply_t;
#pragma pack(0)

#endif /* TYPES_H_ */