1/*	$NetBSD: vtoc.c,v 1.3 2007/02/22 05:31:53 thorpej Exp $	*/
2
3/*-
4 * Copyright (c) 2004 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by UCHIYAMA Yasushi.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: vtoc.c,v 1.3 2007/02/22 05:31:53 thorpej Exp $");
34
35#include <sys/types.h>
36#include <sys/systm.h>
37
38#if !defined(_KERNEL) && defined(_STANDALONE)
39#include <lib/libsa/stand.h>
40#include <lib/libkern/libkern.h>
41#endif
42
43#ifdef VTOC_DEBUG
44#define	DPRINTF(fmt, args...)	printf(fmt, ##args)
45#else
46#define	DPRINTF(arg...)		((void)0)
47#endif
48
49#include <machine/sector.h>
50#include <machine/vtoc.h>
51
52#ifdef VTOC_DEBUG
53void vtoc_print_partition_table(const struct ux_partition *);
54#endif /* VTOC_DEBUG */
55
56bool
57vtoc_sector(void *rwops, struct vtoc_sector *vtoc, int start)
58{
59
60	if (!sector_read(rwops, (void *)vtoc, start + VTOC_SECTOR))
61		return false;
62
63	if (!vtoc_sanity(vtoc))
64		return false;
65
66	return true;
67}
68
69const struct ux_partition *
70vtoc_find_bfs(const struct vtoc_sector *vtoc)
71{
72	int i;
73
74	if (!vtoc_valid(vtoc)) {
75		printf("invalid VTOC\n");
76		return 0;
77	}
78
79	for (i = 0; i < vtoc->npartitions; i++)
80		if (vtoc->partition[i].tag == VTOC_TAG_STAND)
81			break;
82
83	if (i == vtoc->npartitions) {
84		printf("no bfs partition found.\n");
85		return 0;
86	}
87
88	return &vtoc->partition[i];
89}
90
91bool
92vtoc_valid(const struct vtoc_sector *vtoc)
93{
94
95	return (vtoc->magic == VTOC_MAGIC) && (vtoc->version == VTOC_VERSION);
96}
97
98bool
99vtoc_sanity(const struct vtoc_sector *vtoc)
100{
101
102	if (!vtoc_valid(vtoc)) {
103		DPRINTF("Invalid VTOC.\n");
104		return false;
105	}
106
107	DPRINTF("[VTOC] (%d byte)\n", sizeof *vtoc);
108	DPRINTF("Bootinfo = %08x %08x %08x\n",
109	    vtoc->bootinfo[0], vtoc->bootinfo[1], vtoc->bootinfo[2]);
110	DPRINTF("Magic = %08x\n", vtoc->magic);
111	DPRINTF("Version = %d\n", vtoc->version);
112	DPRINTF("Volume = %s\n", vtoc->volume);
113	DPRINTF("Sector size = %d\n", vtoc->sector_size_byte);
114	DPRINTF("# of partitions = %d\n", vtoc->npartitions);
115#ifdef VTOC_DEBUG
116	vtoc_print_partition_table(vtoc->partition);
117#endif
118	return true;
119}
120
121#ifdef VTOC_DEBUG
122void
123vtoc_print_partition_table(const struct ux_partition *p)
124{
125	int i;
126
127	DPRINTF(" Partition Tag  Flags      Start        Count        Last\n");
128	for (i = 0; i < 16; i++, p++) {
129		DPRINTF("     %x      %d    %02x     %8d     %8d    %8d\n",
130		    i, p->tag, p->flags, p->start_sector, p->nsectors,
131		    p->start_sector + p->nsectors - 1);
132	}
133}
134#endif /* VTOC_DEBUG */
135