1/*-
2 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@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 * $FreeBSD$
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, ...)	do {					\
48	if (g_shsec_debug >= (lvl)) {					\
49		printf("GEOM_SHSEC");					\
50		if (g_shsec_debug > 0)					\
51			printf("[%u]", lvl);				\
52		printf(": ");						\
53		printf(__VA_ARGS__);					\
54		printf("\n");						\
55	}								\
56} while (0)
57#define	G_SHSEC_LOGREQ(lvl, bp, ...)	do {				\
58	if (g_shsec_debug >= (lvl)) {					\
59		printf("GEOM_SHSEC");					\
60		if (g_shsec_debug > 0)					\
61			printf("[%u]", lvl);				\
62		printf(": ");						\
63		printf(__VA_ARGS__);					\
64		printf(" ");						\
65		g_print_bio(bp);					\
66		printf("\n");						\
67	}								\
68} while (0)
69
70struct g_shsec_softc {
71	u_int		 sc_type;	/* provider type */
72	struct g_geom	*sc_geom;
73	struct g_provider *sc_provider;
74	uint32_t	 sc_id;		/* device unique ID */
75	struct g_consumer **sc_disks;
76	uint16_t	 sc_ndisks;
77};
78#define	sc_name	sc_geom->name
79#endif	/* _KERNEL */
80
81struct g_shsec_metadata {
82	char		md_magic[16];	/* Magic value. */
83	uint32_t	md_version;	/* Version number. */
84	char		md_name[16];	/* Stripe name. */
85	uint32_t	md_id;		/* Unique ID. */
86	uint16_t	md_no;		/* Disk number. */
87	uint16_t	md_all;		/* Number of all disks. */
88	char		md_provider[16]; /* Hardcoded provider. */
89	uint64_t	md_provsize;	/* Provider's size. */
90};
91static __inline void
92shsec_metadata_encode(const struct g_shsec_metadata *md, u_char *data)
93{
94
95	bcopy(md->md_magic, data, sizeof(md->md_magic));
96	le32enc(data + 16, md->md_version);
97	bcopy(md->md_name, data + 20, sizeof(md->md_name));
98	le32enc(data + 36, md->md_id);
99	le16enc(data + 40, md->md_no);
100	le16enc(data + 42, md->md_all);
101	bcopy(md->md_provider, data + 44, sizeof(md->md_provider));
102	le64enc(data + 60, md->md_provsize);
103}
104static __inline void
105shsec_metadata_decode(const u_char *data, struct g_shsec_metadata *md)
106{
107
108	bcopy(data, md->md_magic, sizeof(md->md_magic));
109	md->md_version = le32dec(data + 16);
110	bcopy(data + 20, md->md_name, sizeof(md->md_name));
111	md->md_id = le32dec(data + 36);
112	md->md_no = le16dec(data + 40);
113	md->md_all = le16dec(data + 42);
114	bcopy(data + 44, md->md_provider, sizeof(md->md_provider));
115	md->md_provsize = le64dec(data + 60);
116}
117#endif	/* _G_SHSEC_H_ */
118