1/*-
2 * Copyright (c) 2005 Ivan Voras <ivoras@freebsd.org>
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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: releng/10.3/sys/geom/virstor/g_virstor_md.c 172302 2007-09-23 07:34:23Z pjd $");
29
30#include <sys/param.h>
31#include <sys/endian.h>
32
33#include <geom/virstor/g_virstor_md.h>
34#include <geom/virstor/binstream.h>
35
36/*
37 * Encode data from g_virstor_metadata structure into a endian-independant
38 * byte stream.
39 */
40void
41virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data)
42{
43	bin_stream_t bs;
44
45	bs_open(&bs, data);
46
47	bs_write_buf(&bs, md->md_magic, sizeof(md->md_magic));
48	bs_write_u32(&bs, md->md_version);
49	bs_write_buf(&bs, md->md_name, sizeof(md->md_name));
50	bs_write_u64(&bs, md->md_virsize);
51	bs_write_u32(&bs, md->md_chunk_size);
52	bs_write_u32(&bs, md->md_id);
53	bs_write_u16(&bs, md->md_count);
54
55	bs_write_buf(&bs, md->provider, sizeof(md->provider));
56	bs_write_u16(&bs, md->no);
57	bs_write_u64(&bs, md->provsize);
58	bs_write_u32(&bs, md->chunk_count);
59	bs_write_u32(&bs, md->chunk_next);
60	bs_write_u16(&bs, md->chunk_reserved);
61	bs_write_u16(&bs, md->flags);
62}
63
64
65/*
66 * Decode data from endian-independant byte stream into g_virstor_metadata
67 * structure.
68 */
69void
70virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md)
71{
72	bin_stream_t bs;
73
74	bs_open(&bs, (char *)(data));
75
76	bs_read_buf(&bs, md->md_magic, sizeof(md->md_magic));
77	md->md_version = bs_read_u32(&bs);
78	bs_read_buf(&bs, md->md_name, sizeof(md->md_name));
79	md->md_virsize = bs_read_u64(&bs);
80	md->md_chunk_size = bs_read_u32(&bs);
81	md->md_id = bs_read_u32(&bs);
82	md->md_count = bs_read_u16(&bs);
83
84	bs_read_buf(&bs, md->provider, sizeof(md->provider));
85	md->no = bs_read_u16(&bs);
86	md->provsize = bs_read_u64(&bs);
87	md->chunk_count = bs_read_u32(&bs);
88	md->chunk_next = bs_read_u32(&bs);
89	md->chunk_reserved = bs_read_u16(&bs);
90	md->flags = bs_read_u16(&bs);
91}
92