1/*-
2 * Copyright (c) 2005 Ivan Voras <ivoras@gmail.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29
30#ifndef _G_VIRSTOR_MD_H_
31#define _G_VIRSTOR_MD_H_
32
33/*
34 * Metadata declaration
35 */
36
37#define	G_VIRSTOR_MAGIC		"GEOM::VIRSTOR"
38#define	G_VIRSTOR_VERSION	1
39
40/* flag: provider is allocated */
41#define	VIRSTOR_PROVIDER_ALLOCATED	1
42/* flag: provider is currently being filled (usually it's the last
43 * provider with VIRSTOR_PROVIDER_ALLOCATED flag */
44#define VIRSTOR_PROVIDER_CURRENT	2
45
46struct g_virstor_metadata {
47	/* Data global to the virstor device */
48	char		md_magic[16];		/* Magic value. */
49	uint32_t	md_version;		/* Version number. */
50	char		md_name[16];		/* Device name (e.g. "mydata") */
51	uint32_t	md_id;			/* Unique ID. */
52	uint64_t	md_virsize;		/* Virtual device's size */
53	uint32_t	md_chunk_size;		/* Chunk size in bytes */
54	uint16_t	md_count;		/* Total number of providers */
55
56	/* Data local to this provider */
57	char		provider[16];		/* Hardcoded provider name */
58	uint16_t	no;			/* Provider number/index */
59	uint64_t	provsize;		/* Provider's size */
60	uint32_t	chunk_count;		/* Number of chunks in this pr. */
61	uint32_t	chunk_next;		/* Next chunk to allocate */
62	uint16_t	chunk_reserved;		/* Count of "reserved" chunks */
63	uint16_t	flags;			/* Provider's flags */
64};
65
66void virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data);
67void virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md);
68
69#endif	/* !_G_VIRSTOR_H_ */
70