1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2005 Ivan Voras <ivoras@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD$");
31
32#include <sys/param.h>
33#include <sys/endian.h>
34
35#include <geom/virstor/g_virstor_md.h>
36#include <geom/virstor/binstream.h>
37
38/*
39 * Encode data from g_virstor_metadata structure into a endian-independant
40 * byte stream.
41 */
42void
43virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data)
44{
45	bin_stream_t bs;
46
47	bs_open(&bs, data);
48
49	bs_write_buf(&bs, md->md_magic, sizeof(md->md_magic));
50	bs_write_u32(&bs, md->md_version);
51	bs_write_buf(&bs, md->md_name, sizeof(md->md_name));
52	bs_write_u64(&bs, md->md_virsize);
53	bs_write_u32(&bs, md->md_chunk_size);
54	bs_write_u32(&bs, md->md_id);
55	bs_write_u16(&bs, md->md_count);
56
57	bs_write_buf(&bs, md->provider, sizeof(md->provider));
58	bs_write_u16(&bs, md->no);
59	bs_write_u64(&bs, md->provsize);
60	bs_write_u32(&bs, md->chunk_count);
61	bs_write_u32(&bs, md->chunk_next);
62	bs_write_u16(&bs, md->chunk_reserved);
63	bs_write_u16(&bs, md->flags);
64}
65
66/*
67 * Decode data from endian-independant byte stream into g_virstor_metadata
68 * structure.
69 */
70void
71virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md)
72{
73	bin_stream_t bs;
74
75	bs_open(&bs, (char *)(data));
76
77	bs_read_buf(&bs, md->md_magic, sizeof(md->md_magic));
78	md->md_version = bs_read_u32(&bs);
79	bs_read_buf(&bs, md->md_name, sizeof(md->md_name));
80	md->md_virsize = bs_read_u64(&bs);
81	md->md_chunk_size = bs_read_u32(&bs);
82	md->md_id = bs_read_u32(&bs);
83	md->md_count = bs_read_u16(&bs);
84
85	bs_read_buf(&bs, md->provider, sizeof(md->provider));
86	md->no = bs_read_u16(&bs);
87	md->provsize = bs_read_u64(&bs);
88	md->chunk_count = bs_read_u32(&bs);
89	md->chunk_next = bs_read_u32(&bs);
90	md->chunk_reserved = bs_read_u16(&bs);
91	md->flags = bs_read_u16(&bs);
92}
93