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 "mkimg.h" 39 #include "scheme.h" 40 41 #ifndef FS_NANDFS 42 #define FS_NANDFS 30 43 #endif 44 45 static struct mkimg_alias bsd_aliases[] = { 46 { ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(FS_NANDFS) }, 47 { ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(FS_SWAP) }, 48 { ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(FS_BSDFFS) }, 49 { ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(FS_VINUM) }, 50 { ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(FS_ZFS) }, 51 { ALIAS_NONE, 0 } 52 }; 53 54 static u_int 55 bsd_metadata(u_int where) 56 { 57 u_int secs; 58 59 secs = BBSIZE / secsz; 60 return ((where == SCHEME_META_IMG_START) ? secs : 0); 61 } 62 63 static int 64 bsd_write(int fd, lba_t imgsz, void *bootcode) 65 { 66 u_char *buf, *p; 67 struct disklabel *d; 68 struct partition *dp; 69 struct part *part; 70 int error, n; 71 uint16_t checksum; 72 73 buf = malloc(BBSIZE); 74 if (buf == NULL) 75 return (ENOMEM); 76 if (bootcode != NULL) { 77 memcpy(buf, bootcode, BBSIZE); 78 memset(buf + secsz, 0, secsz); 79 } else 80 memset(buf, 0, BBSIZE); 81 82 imgsz = ncyls * nheads * nsecs; 83 ftruncate(fd, imgsz * secsz); 84 85 d = (void *)(buf + secsz); 86 le32enc(&d->d_magic, DISKMAGIC); 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, DISKMAGIC); 95 le16enc(&d->d_npartitions, (8 > nparts + 1) ? 8 : nparts + 1); 96 le32enc(&d->d_bbsize, BBSIZE); 97 98 dp = &d->d_partitions[RAW_PART]; 99 le32enc(&dp->p_size, imgsz); 100 STAILQ_FOREACH(part, &partlist, link) { 101 n = part->index + ((part->index >= RAW_PART) ? 1 : 0); 102 dp = &d->d_partitions[n]; 103 le32enc(&dp->p_size, part->size); 104 le32enc(&dp->p_offset, part->block); 105 dp->p_fstype = ALIAS_TYPE2INT(part->type); 106 } 107 108 dp = &d->d_partitions[nparts + 1]; 109 checksum = 0; 110 for (p = buf; p < (u_char *)dp; p += 2) 111 checksum ^= le16dec(p); 112 le16enc(&d->d_checksum, checksum); 113 114 error = mkimg_write(fd, 0, buf, BBSIZE / secsz); 115 free(buf); 116 return (error); 117 } 118 119 static struct mkimg_scheme bsd_scheme = { 120 .name = "bsd", 121 .description = "BSD disk label", 122 .aliases = bsd_aliases, 123 .metadata = bsd_metadata, 124 .write = bsd_write, 125 .nparts = 19, 126 .bootcode = BBSIZE, 127 .maxsecsz = 512 128 }; 129 130 SCHEME_DEFINE(bsd_scheme); 131