1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@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 #ifndef _G_SHSEC_H_
30 #define _G_SHSEC_H_
31
32 #include <sys/endian.h>
33
34 #define G_SHSEC_CLASS_NAME "SHSEC"
35
36 #define G_SHSEC_MAGIC "GEOM::SHSEC"
37 /*
38 * Version history:
39 * 0 - Initial version number.
40 * 1 - Added md_provsize field to metadata.
41 */
42 #define G_SHSEC_VERSION 1
43
44 #ifdef _KERNEL
45 #define G_SHSEC_BFLAG_FIRST 0x1
46
47 #define G_SHSEC_DEBUG(lvl, ...) \
48 _GEOM_DEBUG("GEOM_SHSEC", g_shsec_debug, (lvl), NULL, __VA_ARGS__)
49 #define G_SHSEC_LOGREQ(lvl, bp, ...) \
50 _GEOM_DEBUG("GEOM_SHSEC", g_shsec_debug, (lvl), (bp), __VA_ARGS__)
51
52 struct g_shsec_softc {
53 u_int sc_type; /* provider type */
54 struct g_geom *sc_geom;
55 struct g_provider *sc_provider;
56 uint32_t sc_id; /* device unique ID */
57 struct g_consumer **sc_disks;
58 uint16_t sc_ndisks;
59 };
60 #define sc_name sc_geom->name
61 #endif /* _KERNEL */
62
63 struct g_shsec_metadata {
64 char md_magic[16]; /* Magic value. */
65 uint32_t md_version; /* Version number. */
66 char md_name[16]; /* Stripe name. */
67 uint32_t md_id; /* Unique ID. */
68 uint16_t md_no; /* Disk number. */
69 uint16_t md_all; /* Number of all disks. */
70 char md_provider[16]; /* Hardcoded provider. */
71 uint64_t md_provsize; /* Provider's size. */
72 };
73 static __inline void
shsec_metadata_encode(const struct g_shsec_metadata * md,u_char * data)74 shsec_metadata_encode(const struct g_shsec_metadata *md, u_char *data)
75 {
76
77 bcopy(md->md_magic, data, sizeof(md->md_magic));
78 le32enc(data + 16, md->md_version);
79 bcopy(md->md_name, data + 20, sizeof(md->md_name));
80 le32enc(data + 36, md->md_id);
81 le16enc(data + 40, md->md_no);
82 le16enc(data + 42, md->md_all);
83 bcopy(md->md_provider, data + 44, sizeof(md->md_provider));
84 le64enc(data + 60, md->md_provsize);
85 }
86 static __inline void
shsec_metadata_decode(const u_char * data,struct g_shsec_metadata * md)87 shsec_metadata_decode(const u_char *data, struct g_shsec_metadata *md)
88 {
89
90 bcopy(data, md->md_magic, sizeof(md->md_magic));
91 md->md_version = le32dec(data + 16);
92 bcopy(data + 20, md->md_name, sizeof(md->md_name));
93 md->md_id = le32dec(data + 36);
94 md->md_no = le16dec(data + 40);
95 md->md_all = le16dec(data + 42);
96 bcopy(data + 44, md->md_provider, sizeof(md->md_provider));
97 md->md_provsize = le64dec(data + 60);
98 }
99 #endif /* _G_SHSEC_H_ */
100