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-independent
40 * byte stream.
41 */
42 void
43 virstor_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-independent byte stream into g_virstor_metadata
68 * structure.
69 */
70 void
71 virstor_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 }
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