xref: /freebsd/usr.bin/mkimg/bsd.c (revision a223d3ed90bfe313ce5987d468a25a915d7d1254)
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("$FreeBSD$");
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 
46 static 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 
55 static u_int
56 bsd_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 
64 static int
65 bsd_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 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 	imgsz = (lba_t)ncyls * nheads * nsecs;
84 	error = image_set_size(imgsz);
85 	if (error) {
86 		free(buf);
87 		return (error);
88 	}
89 
90 	d = (void *)(buf + secsz);
91 	le32enc(&d->d_magic, DISKMAGIC);
92 	le32enc(&d->d_secsize, secsz);
93 	le32enc(&d->d_nsectors, nsecs);
94 	le32enc(&d->d_ntracks, nheads);
95 	le32enc(&d->d_ncylinders, ncyls);
96 	le32enc(&d->d_secpercyl, nsecs * nheads);
97 	le32enc(&d->d_secperunit, imgsz);
98 	le16enc(&d->d_rpm, 3600);
99 	le32enc(&d->d_magic2, DISKMAGIC);
100 	le16enc(&d->d_npartitions, (8 > nparts + 1) ? 8 : nparts + 1);
101 	le32enc(&d->d_bbsize, BBSIZE);
102 
103 	dp = &d->d_partitions[RAW_PART];
104 	le32enc(&dp->p_size, imgsz);
105 	STAILQ_FOREACH(part, &partlist, link) {
106 		n = part->index + ((part->index >= RAW_PART) ? 1 : 0);
107 		dp = &d->d_partitions[n];
108 		le32enc(&dp->p_size, part->size);
109 		le32enc(&dp->p_offset, part->block);
110 		dp->p_fstype = ALIAS_TYPE2INT(part->type);
111 	}
112 
113 	dp = &d->d_partitions[nparts + 1];
114 	checksum = 0;
115 	for (p = buf; p < (u_char *)dp; p += 2)
116 		checksum ^= le16dec(p);
117 	le16enc(&d->d_checksum, checksum);
118 
119 	error = image_write(0, buf, BBSIZE / secsz);
120 	free(buf);
121 	return (error);
122 }
123 
124 static struct mkimg_scheme bsd_scheme = {
125 	.name = "bsd",
126 	.description = "BSD disk label",
127 	.aliases = bsd_aliases,
128 	.metadata = bsd_metadata,
129 	.write = bsd_write,
130 	.nparts = 19,
131 	.bootcode = BBSIZE,
132 	.maxsecsz = 512
133 };
134 
135 SCHEME_DEFINE(bsd_scheme);
136