vtoc8.c revision 263924 
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 263924 2014-03-29 22:10:54Z 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
42#ifndef VTOC_TAG_FREEBSD_NANDFS
43#define	VTOC_TAG_FREEBSD_NANDFS	0x0905
44#endif
45
46static struct mkimg_alias vtoc8_aliases[] = {
47    {	ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) },
48    {	ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_SWAP) },
49    {	ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_UFS) },
50    {	ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_VINUM) },
51    {	ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(VTOC_TAG_FREEBSD_NANDFS) },
52    {	ALIAS_NONE, 0 }
53};
54
55static u_int
56vtoc8_metadata(u_int where)
57{
58	u_int secs;
59
60	secs = (where == SCHEME_META_IMG_START) ? nsecs * nheads : 0;
61	return (secs);
62}
63
64static int
65vtoc8_write(int fd, lba_t imgsz, void *bootcode __unused)
66{
67	struct vtoc8 vtoc8;
68	struct part *part;
69	u_char *p;
70	int error, n;
71	uint16_t ofs, sum;
72
73	imgsz = ncyls * nheads * nsecs;
74
75	memset(&vtoc8, 0, sizeof(vtoc8));
76	sprintf(vtoc8.ascii, "FreeBSD%lldM",
77	    (long long)(imgsz * secsz / 1048576));
78	be32enc(&vtoc8.version, VTOC_VERSION);
79	be16enc(&vtoc8.nparts, VTOC8_NPARTS);
80	be32enc(&vtoc8.sanity, VTOC_SANITY);
81	be16enc(&vtoc8.rpm, 3600);
82	be16enc(&vtoc8.physcyls, ncyls);
83	be16enc(&vtoc8.ncyls, ncyls);
84	be16enc(&vtoc8.altcyls, 0);
85	be16enc(&vtoc8.nheads, nheads);
86	be16enc(&vtoc8.nsecs, nsecs);
87	be16enc(&vtoc8.magic, VTOC_MAGIC);
88
89	ftruncate(fd, imgsz * secsz);
90
91	be32enc(&vtoc8.map[VTOC_RAW_PART].nblks, imgsz);
92	STAILQ_FOREACH(part, &partlist, link) {
93		n = part->index + ((part->index >= VTOC_RAW_PART) ? 1 : 0);
94		be16enc(&vtoc8.part[n].tag, ALIAS_TYPE2INT(part->type));
95		be32enc(&vtoc8.map[n].cyl, part->block / (nsecs * nheads));
96		be32enc(&vtoc8.map[n].nblks, part->size);
97	}
98
99	/* Calculate checksum. */
100	sum = 0;
101	p = (void *)&vtoc8;
102	for (ofs = 0; ofs < sizeof(vtoc8) - 2; ofs += 2)
103		sum ^= be16dec(p + ofs);
104	be16enc(&vtoc8.cksum, sum);
105
106	error = mkimg_seek(fd, 0);
107	if (error == 0) {
108		if (write(fd, &vtoc8, sizeof(vtoc8)) != sizeof(vtoc8))
109			error = errno;
110	}
111	return (error);
112}
113
114static struct mkimg_scheme vtoc8_scheme = {
115	.name = "vtoc8",
116	.description = "SMI VTOC8 disk labels",
117	.aliases = vtoc8_aliases,
118	.metadata = vtoc8_metadata,
119	.write = vtoc8_write,
120	.nparts = VTOC8_NPARTS - 1,
121	.maxsecsz = 512
122};
123
124SCHEME_DEFINE(vtoc8_scheme);
125