1172302Spjd/*-
2172302Spjd * Copyright (c) 2005 Ivan Voras <ivoras@gmail.com>
3172302Spjd * All rights reserved.
4172302Spjd *
5172302Spjd * Redistribution and use in source and binary forms, with or without
6172302Spjd * modification, are permitted provided that the following conditions
7172302Spjd * are met:
8172302Spjd * 1. Redistributions of source code must retain the above copyright
9172302Spjd *    notice, this list of conditions and the following disclaimer.
10172302Spjd * 2. Redistributions in binary form must reproduce the above copyright
11172302Spjd *    notice, this list of conditions and the following disclaimer in the
12172302Spjd *    documentation and/or other materials provided with the distribution.
13172302Spjd *
14172302Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15172302Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16172302Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17172302Spjd * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18172302Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19172302Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20172302Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21172302Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22172302Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23172302Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24172302Spjd * SUCH DAMAGE.
25172302Spjd *
26172302Spjd * $FreeBSD$
27172302Spjd */
28172302Spjd
29172302Spjd
30172302Spjd#ifndef _G_VIRSTOR_MD_H_
31172302Spjd#define _G_VIRSTOR_MD_H_
32172302Spjd
33172302Spjd/*
34172302Spjd * Metadata declaration
35172302Spjd */
36172302Spjd
37172302Spjd#define	G_VIRSTOR_MAGIC		"GEOM::VIRSTOR"
38172302Spjd#define	G_VIRSTOR_VERSION	1
39172302Spjd
40172302Spjd/* flag: provider is allocated */
41172302Spjd#define	VIRSTOR_PROVIDER_ALLOCATED	1
42172302Spjd/* flag: provider is currently being filled (usually it's the last
43172302Spjd * provider with VIRSTOR_PROVIDER_ALLOCATED flag */
44172302Spjd#define VIRSTOR_PROVIDER_CURRENT	2
45172302Spjd
46172302Spjdstruct g_virstor_metadata {
47172302Spjd	/* Data global to the virstor device */
48172302Spjd	char		md_magic[16];		/* Magic value. */
49172302Spjd	uint32_t	md_version;		/* Version number. */
50172302Spjd	char		md_name[16];		/* Device name (e.g. "mydata") */
51172302Spjd	uint32_t	md_id;			/* Unique ID. */
52172302Spjd	uint64_t	md_virsize;		/* Virtual device's size */
53172302Spjd	uint32_t	md_chunk_size;		/* Chunk size in bytes */
54172302Spjd	uint16_t	md_count;		/* Total number of providers */
55172302Spjd
56172302Spjd	/* Data local to this provider */
57172302Spjd	char		provider[16];		/* Hardcoded provider name */
58172302Spjd	uint16_t	no;			/* Provider number/index */
59172302Spjd	uint64_t	provsize;		/* Provider's size */
60172302Spjd	uint32_t	chunk_count;		/* Number of chunks in this pr. */
61172302Spjd	uint32_t	chunk_next;		/* Next chunk to allocate */
62172302Spjd	uint16_t	chunk_reserved;		/* Count of "reserved" chunks */
63172302Spjd	uint16_t	flags;			/* Provider's flags */
64172302Spjd};
65172302Spjd
66172302Spjdvoid virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data);
67172302Spjdvoid virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md);
68172302Spjd
69172302Spjd#endif	/* !_G_VIRSTOR_H_ */
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