1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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/param.h>
30 #include <sys/endian.h>
31
32 #include <geom/virstor/g_virstor_md.h>
33 #include <geom/virstor/binstream.h>
34
35 /*
36 * Encode data from g_virstor_metadata structure into a endian-independent
37 * byte stream.
38 */
39 void
virstor_metadata_encode(struct g_virstor_metadata * md,unsigned char * data)40 virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data)
41 {
42 bin_stream_t bs;
43
44 bs_open(&bs, data);
45
46 bs_write_buf(&bs, md->md_magic, sizeof(md->md_magic));
47 bs_write_u32(&bs, md->md_version);
48 bs_write_buf(&bs, md->md_name, sizeof(md->md_name));
49 bs_write_u64(&bs, md->md_virsize);
50 bs_write_u32(&bs, md->md_chunk_size);
51 bs_write_u32(&bs, md->md_id);
52 bs_write_u16(&bs, md->md_count);
53
54 bs_write_buf(&bs, md->provider, sizeof(md->provider));
55 bs_write_u16(&bs, md->no);
56 bs_write_u64(&bs, md->provsize);
57 bs_write_u32(&bs, md->chunk_count);
58 bs_write_u32(&bs, md->chunk_next);
59 bs_write_u16(&bs, md->chunk_reserved);
60 bs_write_u16(&bs, md->flags);
61 }
62
63 /*
64 * Decode data from endian-independent byte stream into g_virstor_metadata
65 * structure.
66 */
67 void
virstor_metadata_decode(unsigned char * data,struct g_virstor_metadata * md)68 virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md)
69 {
70 bin_stream_t bs;
71
72 bs_open(&bs, (char *)(data));
73
74 bs_read_buf(&bs, md->md_magic, sizeof(md->md_magic));
75 md->md_version = bs_read_u32(&bs);
76 bs_read_buf(&bs, md->md_name, sizeof(md->md_name));
77 md->md_virsize = bs_read_u64(&bs);
78 md->md_chunk_size = bs_read_u32(&bs);
79 md->md_id = bs_read_u32(&bs);
80 md->md_count = bs_read_u16(&bs);
81
82 bs_read_buf(&bs, md->provider, sizeof(md->provider));
83 md->no = bs_read_u16(&bs);
84 md->provsize = bs_read_u64(&bs);
85 md->chunk_count = bs_read_u32(&bs);
86 md->chunk_next = bs_read_u32(&bs);
87 md->chunk_reserved = bs_read_u16(&bs);
88 md->flags = bs_read_u16(&bs);
89 }
90