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/errno.h>
31 #include <stdint.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <unistd.h>
35
36 #include <sys/disklabel.h>
37
38 #include "endian.h"
39 #include "image.h"
40 #include "mkimg.h"
41 #include "scheme.h"
42
43 #ifndef FS_NANDFS
44 #define FS_NANDFS 30
45 #endif
46
47 static struct mkimg_alias bsd_aliases[] = {
48 { ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(FS_NANDFS) },
49 { ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(FS_SWAP) },
50 { ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(FS_BSDFFS) },
51 { ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(FS_VINUM) },
52 { ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(FS_ZFS) },
53 { ALIAS_NONE, 0 }
54 };
55
56 static lba_t
bsd_metadata(u_int where,lba_t blk)57 bsd_metadata(u_int where, lba_t blk)
58 {
59
60 if (where == SCHEME_META_IMG_START)
61 blk += BBSIZE / secsz;
62 else if (where == SCHEME_META_IMG_END)
63 blk = round_cylinder(blk);
64 else
65 blk = round_block(blk);
66 return (blk);
67 }
68
69 static int
bsd_write(lba_t imgsz,void * bootcode)70 bsd_write(lba_t imgsz, void *bootcode)
71 {
72 u_char *buf, *p;
73 struct disklabel *d;
74 struct partition *dp;
75 struct part *part;
76 int bsdparts, error, n;
77 uint16_t checksum;
78
79 buf = malloc(BBSIZE);
80 if (buf == NULL)
81 return (ENOMEM);
82 if (bootcode != NULL) {
83 memcpy(buf, bootcode, BBSIZE);
84 memset(buf + secsz, 0, sizeof(struct disklabel));
85 } else
86 memset(buf, 0, BBSIZE);
87
88 bsdparts = nparts + 1; /* Account for c partition */
89 if (bsdparts < MAXPARTITIONS)
90 bsdparts = MAXPARTITIONS;
91
92 d = (void *)(buf + secsz);
93 le32enc(&d->d_magic, DISKMAGIC);
94 le32enc(&d->d_secsize, secsz);
95 le32enc(&d->d_nsectors, nsecs);
96 le32enc(&d->d_ntracks, nheads);
97 le32enc(&d->d_ncylinders, ncyls);
98 le32enc(&d->d_secpercyl, nsecs * nheads);
99 le32enc(&d->d_secperunit, imgsz);
100 le16enc(&d->d_rpm, 3600);
101 le32enc(&d->d_magic2, DISKMAGIC);
102 le16enc(&d->d_npartitions, bsdparts);
103 le32enc(&d->d_bbsize, BBSIZE);
104
105 dp = &d->d_partitions[RAW_PART];
106 le32enc(&dp->p_size, imgsz);
107 TAILQ_FOREACH(part, &partlist, link) {
108 n = part->index + ((part->index >= RAW_PART) ? 1 : 0);
109 dp = &d->d_partitions[n];
110 le32enc(&dp->p_size, part->size);
111 le32enc(&dp->p_offset, part->block);
112 le32enc(&dp->p_fsize, 0);
113 dp->p_fstype = ALIAS_TYPE2INT(part->type);
114 dp->p_frag = 0;
115 le16enc(&dp->p_cpg, 0);
116 }
117
118 dp = &d->d_partitions[bsdparts];
119 checksum = 0;
120 for (p = (void *)d; p < (u_char *)dp; p += 2)
121 checksum ^= le16dec(p);
122 le16enc(&d->d_checksum, checksum);
123
124 error = image_write(0, buf, BBSIZE / secsz);
125 free(buf);
126 return (error);
127 }
128
129 static struct mkimg_scheme bsd_scheme = {
130 .name = "bsd",
131 .description = "BSD disk label",
132 .aliases = bsd_aliases,
133 .metadata = bsd_metadata,
134 .write = bsd_write,
135 .nparts = 19,
136 .bootcode = BBSIZE,
137 .maxsecsz = 512
138 };
139
140 SCHEME_DEFINE(bsd_scheme);
141