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 #include <sys/errno.h> 29 #include <stdint.h> 30 #include <stdlib.h> 31 #include <string.h> 32 33 #include <bsd.h> 34 35 #include "endian.h" 36 #include "image.h" 37 #include "mkimg.h" 38 #include "scheme.h" 39 40 static struct mkimg_alias bsd_aliases[] = { 41 { ALIAS_FREEBSD_NANDFS, ALIAS_INT2TYPE(FS_NANDFS) }, 42 { ALIAS_FREEBSD_SWAP, ALIAS_INT2TYPE(FS_SWAP) }, 43 { ALIAS_FREEBSD_UFS, ALIAS_INT2TYPE(FS_BSDFFS) }, 44 { ALIAS_FREEBSD_VINUM, ALIAS_INT2TYPE(FS_VINUM) }, 45 { ALIAS_FREEBSD_ZFS, ALIAS_INT2TYPE(FS_ZFS) }, 46 { ALIAS_NONE, 0 } 47 }; 48 49 static lba_t 50 bsd_metadata(u_int where, lba_t blk) 51 { 52 53 if (where == SCHEME_META_IMG_START) 54 blk += BSD_BOOTBLOCK_SIZE / secsz; 55 else if (where == SCHEME_META_IMG_END) 56 blk = round_cylinder(blk); 57 else 58 blk = round_block(blk); 59 return (blk); 60 } 61 62 static int 63 bsd_write(lba_t imgsz, void *bootcode) 64 { 65 u_char *buf, *p; 66 struct disklabel *d; 67 struct partition *dp; 68 struct part *part; 69 int bsdparts, error, n; 70 uint16_t checksum; 71 72 buf = malloc(BSD_BOOTBLOCK_SIZE); 73 if (buf == NULL) 74 return (ENOMEM); 75 if (bootcode != NULL) { 76 memcpy(buf, bootcode, BSD_BOOTBLOCK_SIZE); 77 memset(buf + secsz, 0, sizeof(struct disklabel)); 78 } else 79 memset(buf, 0, BSD_BOOTBLOCK_SIZE); 80 81 bsdparts = nparts + 1; /* Account for c partition */ 82 if (bsdparts < BSD_NPARTS_MIN) 83 bsdparts = BSD_NPARTS_MIN; 84 85 d = (void *)(buf + secsz); 86 le32enc(&d->d_magic, BSD_MAGIC); 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, BSD_MAGIC); 95 le16enc(&d->d_npartitions, bsdparts); 96 le32enc(&d->d_bbsize, BSD_BOOTBLOCK_SIZE); 97 98 dp = &d->d_partitions[BSD_PART_RAW]; 99 le32enc(&dp->p_size, imgsz); 100 TAILQ_FOREACH(part, &partlist, link) { 101 n = part->index + ((part->index >= BSD_PART_RAW) ? 1 : 0); 102 dp = &d->d_partitions[n]; 103 le32enc(&dp->p_size, part->size); 104 le32enc(&dp->p_offset, part->block); 105 le32enc(&dp->p_fsize, 0); 106 dp->p_fstype = ALIAS_TYPE2INT(part->type); 107 dp->p_frag = 0; 108 le16enc(&dp->p_cpg, 0); 109 } 110 111 dp = &d->d_partitions[bsdparts]; 112 checksum = 0; 113 for (p = (void *)d; p < (u_char *)dp; p += 2) 114 checksum ^= le16dec(p); 115 le16enc(&d->d_checksum, checksum); 116 117 error = image_write(0, buf, BSD_BOOTBLOCK_SIZE / secsz); 118 free(buf); 119 return (error); 120 } 121 122 static struct mkimg_scheme bsd_scheme = { 123 .name = "bsd", 124 .description = "BSD disk label", 125 .aliases = bsd_aliases, 126 .metadata = bsd_metadata, 127 .write = bsd_write, 128 .nparts = BSD_NPARTS_MAX - 1, 129 .bootcode = BSD_BOOTBLOCK_SIZE, 130 .maxsecsz = 512 131 }; 132 133 SCHEME_DEFINE(bsd_scheme); 134