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