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