bsd.c revision 271843
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/bsd.c 271843 2014-09-18 22:16:20Z marcel $");
29
30#include <sys/types.h>
31#include <sys/disklabel.h>
32#include <sys/endian.h>
33#include <sys/errno.h>
34#include <stdlib.h>
35#include <string.h>
36#include <unistd.h>
37
38#include "image.h"
39#include "mkimg.h"
40#include "scheme.h"
41
42#ifndef FS_NANDFS
43#define	FS_NANDFS	30
44#endif
45
46static struct mkimg_alias bsd_aliases[] = {
47    {	ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(FS_NANDFS) },
48    {	ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(FS_SWAP) },
49    {	ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(FS_BSDFFS) },
50    {	ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(FS_VINUM) },
51    {	ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(FS_ZFS) },
52    {	ALIAS_NONE, 0 }
53};
54
55static u_int
56bsd_metadata(u_int where)
57{
58	u_int secs;
59
60	secs = BBSIZE / secsz;
61	return ((where == SCHEME_META_IMG_START) ? secs : 0);
62}
63
64static int
65bsd_write(lba_t imgsz, void *bootcode)
66{
67	u_char *buf, *p;
68	struct disklabel *d;
69	struct partition *dp;
70	struct part *part;
71	int bsdparts, error, n;
72	uint16_t checksum;
73
74	buf = malloc(BBSIZE);
75	if (buf == NULL)
76		return (ENOMEM);
77	if (bootcode != NULL) {
78		memcpy(buf, bootcode, BBSIZE);
79		memset(buf + secsz, 0, secsz);
80	} else
81		memset(buf, 0, BBSIZE);
82
83	bsdparts = nparts + 1;	/* Account for c partition */
84	if (bsdparts < MAXPARTITIONS)
85		bsdparts = MAXPARTITIONS;
86	imgsz = (lba_t)ncyls * nheads * nsecs;
87	error = image_set_size(imgsz);
88	if (error) {
89		free(buf);
90		return (error);
91	}
92
93	d = (void *)(buf + secsz);
94	le32enc(&d->d_magic, DISKMAGIC);
95	le32enc(&d->d_secsize, secsz);
96	le32enc(&d->d_nsectors, nsecs);
97	le32enc(&d->d_ntracks, nheads);
98	le32enc(&d->d_ncylinders, ncyls);
99	le32enc(&d->d_secpercyl, nsecs * nheads);
100	le32enc(&d->d_secperunit, imgsz);
101	le16enc(&d->d_rpm, 3600);
102	le32enc(&d->d_magic2, DISKMAGIC);
103	le16enc(&d->d_npartitions, bsdparts);
104	le32enc(&d->d_bbsize, BBSIZE);
105
106	dp = &d->d_partitions[RAW_PART];
107	le32enc(&dp->p_size, imgsz);
108	STAILQ_FOREACH(part, &partlist, link) {
109		n = part->index + ((part->index >= RAW_PART) ? 1 : 0);
110		dp = &d->d_partitions[n];
111		le32enc(&dp->p_size, part->size);
112		le32enc(&dp->p_offset, part->block);
113		dp->p_fstype = ALIAS_TYPE2INT(part->type);
114	}
115
116	dp = &d->d_partitions[bsdparts];
117	checksum = 0;
118	for (p = (void *)d; p < (u_char *)dp; p += 2)
119		checksum ^= le16dec(p);
120	le16enc(&d->d_checksum, checksum);
121
122	error = image_write(0, buf, BBSIZE / secsz);
123	free(buf);
124	return (error);
125}
126
127static struct mkimg_scheme bsd_scheme = {
128	.name = "bsd",
129	.description = "BSD disk label",
130	.aliases = bsd_aliases,
131	.metadata = bsd_metadata,
132	.write = bsd_write,
133	.nparts = 19,
134	.bootcode = BBSIZE,
135	.maxsecsz = 512
136};
137
138SCHEME_DEFINE(bsd_scheme);
139