vtoc8.c revision 268161 
1/*-
2 * Copyright (c) 2014 Juniper Networks, Inc.
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 AUTHOR 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 AUTHOR 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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/usr.bin/mkimg/vtoc8.c 268161 2014-07-02 14:54:41Z marcel $");
29
30#include <sys/types.h>
31#include <sys/endian.h>
32#include <sys/errno.h>
33#include <sys/vtoc.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <unistd.h>
38
39#include "image.h"
40#include "mkimg.h"
41#include "scheme.h"
42
43#ifndef VTOC_TAG_FREEBSD_NANDFS
44#define	VTOC_TAG_FREEBSD_NANDFS	0x0905
45#endif
46
47static struct mkimg_alias vtoc8_aliases[] = {
48    {	ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) },
49    {	ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_SWAP) },
50    {	ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_UFS) },
51    {	ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_VINUM) },
52    {	ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) },
53    {	ALIAS_NONE, 0 }
54};
55
56static u_int
57vtoc8_metadata(u_int where)
58{
59	u_int secs;
60
61	secs = (where == SCHEME_META_IMG_START) ? nsecs * nheads : 0;
62	return (secs);
63}
64
65static int
66vtoc8_write(lba_t imgsz, void *bootcode __unused)
67{
68	struct vtoc8 vtoc8;
69	struct part *part;
70	u_char *p;
71	int error, n;
72	uint16_t ofs, sum;
73
74	imgsz = (lba_t)ncyls * nheads * nsecs;
75
76	memset(&vtoc8, 0, sizeof(vtoc8));
77	sprintf(vtoc8.ascii, "FreeBSD%lldM",
78	    (long long)(imgsz * secsz / 1048576));
79	be32enc(&vtoc8.version, VTOC_VERSION);
80	be16enc(&vtoc8.nparts, VTOC8_NPARTS);
81	be32enc(&vtoc8.sanity, VTOC_SANITY);
82	be16enc(&vtoc8.rpm, 3600);
83	be16enc(&vtoc8.physcyls, ncyls);
84	be16enc(&vtoc8.ncyls, ncyls);
85	be16enc(&vtoc8.altcyls, 0);
86	be16enc(&vtoc8.nheads, nheads);
87	be16enc(&vtoc8.nsecs, nsecs);
88	be16enc(&vtoc8.magic, VTOC_MAGIC);
89
90	error = image_set_size(imgsz);
91	if (error)
92		return (error);
93
94	be32enc(&vtoc8.map[VTOC_RAW_PART].nblks, imgsz);
95	STAILQ_FOREACH(part, &partlist, link) {
96		n = part->index + ((part->index >= VTOC_RAW_PART) ? 1 : 0);
97		be16enc(&vtoc8.part[n].tag, ALIAS_TYPE2INT(part->type));
98		be32enc(&vtoc8.map[n].cyl, part->block / (nsecs * nheads));
99		be32enc(&vtoc8.map[n].nblks, part->size);
100	}
101
102	/* Calculate checksum. */
103	sum = 0;
104	p = (void *)&vtoc8;
105	for (ofs = 0; ofs < sizeof(vtoc8) - 2; ofs += 2)
106		sum ^= be16dec(p + ofs);
107	be16enc(&vtoc8.cksum, sum);
108
109	error = image_write(0, &vtoc8, 1);
110	return (error);
111}
112
113static struct mkimg_scheme vtoc8_scheme = {
114	.name = "vtoc8",
115	.description = "SMI VTOC8 disk labels",
116	.aliases = vtoc8_aliases,
117	.metadata = vtoc8_metadata,
118	.write = vtoc8_write,
119	.nparts = VTOC8_NPARTS - 1,
120	.maxsecsz = 512
121};
122
123SCHEME_DEFINE(vtoc8_scheme);
124