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 lba_t 56 bsd_metadata(u_int where, lba_t blk) 57 { 58 59 if (where == SCHEME_META_IMG_START) 60 blk += BBSIZE / secsz; 61 else if (where == SCHEME_META_IMG_END) 62 blk = round_cylinder(blk); 63 else 64 blk = round_block(blk); 65 return (blk); 66 } 67 68 static int 69 bsd_write(lba_t imgsz, void *bootcode) 70 { 71 u_char *buf, *p; 72 struct disklabel *d; 73 struct partition *dp; 74 struct part *part; 75 int bsdparts, error, n; 76 uint16_t checksum; 77 78 buf = malloc(BBSIZE); 79 if (buf == NULL) 80 return (ENOMEM); 81 if (bootcode != NULL) { 82 memcpy(buf, bootcode, BBSIZE); 83 memset(buf + secsz, 0, sizeof(struct disklabel)); 84 } else 85 memset(buf, 0, BBSIZE); 86 87 bsdparts = nparts + 1; /* Account for c partition */ 88 if (bsdparts < MAXPARTITIONS) 89 bsdparts = MAXPARTITIONS; 90 91 d = (void *)(buf + secsz); 92 le32enc(&d->d_magic, DISKMAGIC); 93 le32enc(&d->d_secsize, secsz); 94 le32enc(&d->d_nsectors, nsecs); 95 le32enc(&d->d_ntracks, nheads); 96 le32enc(&d->d_ncylinders, ncyls); 97 le32enc(&d->d_secpercyl, nsecs * nheads); 98 le32enc(&d->d_secperunit, imgsz); 99 le16enc(&d->d_rpm, 3600); 100 le32enc(&d->d_magic2, DISKMAGIC); 101 le16enc(&d->d_npartitions, bsdparts); 102 le32enc(&d->d_bbsize, BBSIZE); 103 104 dp = &d->d_partitions[RAW_PART]; 105 le32enc(&dp->p_size, imgsz); 106 STAILQ_FOREACH(part, &partlist, link) { 107 n = part->index + ((part->index >= RAW_PART) ? 1 : 0); 108 dp = &d->d_partitions[n]; 109 le32enc(&dp->p_size, part->size); 110 le32enc(&dp->p_offset, part->block); 111 le32enc(&dp->p_fsize, 0); 112 dp->p_fstype = ALIAS_TYPE2INT(part->type); 113 dp->p_frag = 0; 114 le16enc(&dp->p_cpg, 0); 115 } 116 117 dp = &d->d_partitions[bsdparts]; 118 checksum = 0; 119 for (p = (void *)d; p < (u_char *)dp; p += 2) 120 checksum ^= le16dec(p); 121 le16enc(&d->d_checksum, checksum); 122 123 error = image_write(0, buf, BBSIZE / secsz); 124 free(buf); 125 return (error); 126 } 127 128 static struct mkimg_scheme bsd_scheme = { 129 .name = "bsd", 130 .description = "BSD disk label", 131 .aliases = bsd_aliases, 132 .metadata = bsd_metadata, 133 .write = bsd_write, 134 .nparts = 19, 135 .bootcode = BBSIZE, 136 .maxsecsz = 512 137 }; 138 139 SCHEME_DEFINE(bsd_scheme); 140