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 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 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