vtoc8.c revision 263918 
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: head/usr.bin/mkimg/vtoc8.c 263893 2014-03-29 03:14:00Z 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 "mkimg.h"
40#include "scheme.h"
41
42static struct mkimg_alias vtoc8_aliases[] = {
43    {	ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) },
44    {	ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_SWAP) },
45    {	ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_UFS) },
46    {	ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_VINUM) },
47    {	ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) },
48    {	ALIAS_NONE, 0 }
49};
50
51static u_int
52vtoc8_metadata(u_int where)
53{
54	u_int secs;
55
56	secs = (where == SCHEME_META_IMG_START) ? nsecs * nheads : 0;
57	return (secs);
58}
59
60static int
61vtoc8_write(int fd, lba_t imgsz, void *bootcode __unused)
62{
63	struct vtoc8 vtoc8;
64	struct part *part;
65	u_char *p;
66	int error, n;
67	uint16_t ofs, sum;
68
69	imgsz = ncyls * nheads * nsecs;
70
71	memset(&vtoc8, 0, sizeof(vtoc8));
72	sprintf(vtoc8.ascii, "FreeBSD%lldM",
73	    (long long)(imgsz * secsz / 1048576));
74	be32enc(&vtoc8.version, VTOC_VERSION);
75	be16enc(&vtoc8.nparts, VTOC8_NPARTS);
76	be32enc(&vtoc8.sanity, VTOC_SANITY);
77	be16enc(&vtoc8.rpm, 3600);
78	be16enc(&vtoc8.physcyls, ncyls);
79	be16enc(&vtoc8.ncyls, ncyls);
80	be16enc(&vtoc8.altcyls, 0);
81	be16enc(&vtoc8.nheads, nheads);
82	be16enc(&vtoc8.nsecs, nsecs);
83	be16enc(&vtoc8.magic, VTOC_MAGIC);
84
85	ftruncate(fd, imgsz * secsz);
86
87	be32enc(&vtoc8.map[VTOC_RAW_PART].nblks, imgsz);
88	STAILQ_FOREACH(part, &partlist, link) {
89		n = part->index + ((part->index >= VTOC_RAW_PART) ? 1 : 0);
90		be16enc(&vtoc8.part[n].tag, ALIAS_TYPE2INT(part->type));
91		be32enc(&vtoc8.map[n].cyl, part->block / (nsecs * nheads));
92		be32enc(&vtoc8.map[n].nblks, part->size);
93	}
94
95	/* Calculate checksum. */
96	sum = 0;
97	p = (void *)&vtoc8;
98	for (ofs = 0; ofs < sizeof(vtoc8) - 2; ofs += 2)
99		sum ^= be16dec(p + ofs);
100	be16enc(&vtoc8.cksum, sum);
101
102	error = mkimg_seek(fd, 0);
103	if (error == 0) {
104		if (write(fd, &vtoc8, sizeof(vtoc8)) != sizeof(vtoc8))
105			error = errno;
106	}
107	return (error);
108}
109
110static struct mkimg_scheme vtoc8_scheme = {
111	.name = "vtoc8",
112	.description = "SMI VTOC8 disk labels",
113	.aliases = vtoc8_aliases,
114	.metadata = vtoc8_metadata,
115	.write = vtoc8_write,
116	.nparts = VTOC8_NPARTS - 1,
117	.maxsecsz = 512
118};
119
120SCHEME_DEFINE(vtoc8_scheme);
121