1 /* @(#)sunlabel.h 1.5 03/12/28 Copyright 1999-2003 J. Schilling */ 2 /* 3 * Support for Sun disk label 4 * 5 * Copyright (c) 1999-2003 J. Schilling 6 */ 7 /* 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 10 * as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License along with 18 * this program; see the file COPYING. If not, write to the Free Software 19 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 20 */ 21 22 #ifndef howmany 23 #define howmany(x, y) (((x)+((y)-1))/(y)) 24 #endif 25 #ifndef roundup 26 #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) 27 #endif 28 29 #define NDKMAP 8 /* # of sparc partitions */ 30 #define NX86MAP 16 /* # if x86 partitions */ 31 #define DKL_MAGIC 0xDABE /* magic number */ 32 #define DKL_MAGIC_0 0xDA /* magic number high byte */ 33 #define DKL_MAGIC_1 0xBE /* magic number low byte */ 34 35 #define CD_DEFLABEL "CD-ROM Disc with Sun sparc boot created by mkisofs" 36 #define CD_X86LABEL "CD-ROM Disc with Sun x86 boot created by mkisofs" 37 38 /* 39 * Define a virtual geometry for the CD disk label. 40 * The current values are stolen from Sun install disks and do not seem to be 41 * a good idea as they limit the size of the CD to 327680 sectors which is less 42 * than 74 minutes. 43 * There are 84 minute CD's with 378000 sectors and there will be DVD's with 44 * even more. 45 */ 46 #define CD_RPM 350 47 #define CD_PCYL 2048 48 #define CD_APC 0 49 #define CD_INTRLV 1 50 #define CD_NCYL 2048 51 #define CD_ACYL 0 52 #define CD_NHEAD 1 53 #define CD_NSECT 640 54 55 /* 56 * NOTE: The virtual cylinder size on CD must be a mutiple of 2048. 57 * This is true if CD_NSECT is a multiple of 4. 58 */ 59 #define CD_CYLSIZE (CD_NSECT*CD_NHEAD*512) 60 61 #define V_VERSION 1 /* The VTOC version */ 62 #define VTOC_SANE 0x600DDEEE /* Indicates a sane VTOC */ 63 64 #define V_ROOT 0x02 /* Root partiton */ 65 #define V_USR 0x04 /* Usr partiton */ 66 67 #define V_RONLY 0x10 /* Read only */ 68 69 /* 70 * The Sun sparc disk label (at offset 0 on a disk) 71 */ 72 struct sun_label { 73 char dkl_ascilabel[128]; 74 struct dk_vtoc { 75 Uchar v_version[4]; /* layout version */ 76 char v_volume[8]; /* volume name */ 77 Uchar v_nparts[2]; /* number of partitions */ 78 struct dk_map2 { 79 Uchar p_tag[2]; /* ID tag of partition */ 80 Uchar p_flag[2]; /* permission flag */ 81 82 } v_part[NDKMAP]; 83 Uchar v_xxpad[2]; /* To come over Sun's alignement problem */ 84 Uchar v_bootinfo[3*4]; /* info for mboot */ 85 Uchar v_sanity[4]; /* to verify vtoc sanity */ 86 Uchar v_reserved[10*4]; 87 Uchar v_timestamp[NDKMAP*4]; 88 89 } dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */ 90 char dkl_pad[512-(128+sizeof (struct dk_vtoc)+NDKMAP*8+14*2)]; 91 Uchar dkl_rpm[2]; /* rotations per minute */ 92 Uchar dkl_pcyl[2]; /* # physical cylinders */ 93 Uchar dkl_apc[2]; /* alternates per cylinder */ 94 Uchar dkl_obs1[2]; /* obsolete */ 95 Uchar dkl_obs2[2]; /* obsolete */ 96 Uchar dkl_intrlv[2]; /* interleave factor */ 97 Uchar dkl_ncyl[2]; /* # of data cylinders */ 98 Uchar dkl_acyl[2]; /* # of alternate cylinders */ 99 Uchar dkl_nhead[2]; /* # of heads in this partition */ 100 Uchar dkl_nsect[2]; /* # of 512 byte sectors per track */ 101 Uchar dkl_obs3[2]; /* obsolete */ 102 Uchar dkl_obs4[2]; /* obsolete */ 103 104 struct dk_map { /* logical partitions */ 105 Uchar dkl_cylno[4]; /* starting cylinder */ 106 Uchar dkl_nblk[4]; /* number of blocks */ 107 } dkl_map[NDKMAP]; /* logical partition headers */ 108 109 Uchar dkl_magic[2]; /* identifies this label format */ 110 Uchar dkl_cksum[2]; /* xor checksum of sector */ 111 }; 112 113 /* 114 * The Sun x86 / AT&T disk label (at offset 512 on a fdisk partition) 115 */ 116 struct x86_label { 117 struct x86_vtoc { 118 Uchar v_bootinfo[3*4]; /* unsupported */ 119 Uchar v_sanity[4]; /* to verify vtoc sanity */ 120 Uchar v_version[4]; /* layout version */ 121 char v_volume[8]; /* volume name */ 122 Uchar v_sectorsz[2]; /* # of bytes in a sector */ 123 Uchar v_nparts[2]; /* # of partitions */ 124 Uchar v_reserved[10*4]; 125 struct dkl_partition { 126 Uchar p_tag[2]; /* ID tag of partition */ 127 Uchar p_flag[2]; /* permission flag */ 128 Uchar p_start[4]; /* starting sector */ 129 Uchar p_size[4]; /* number of blocks */ 130 } v_part[NX86MAP]; 131 Uchar timestamp[NX86MAP][4]; 132 char v_asciilabel[128]; 133 } dkl_vtoc; /* vtoc inclusions from AT&T SVr4 */ 134 Uchar dkl_pcyl[4]; /* # physical cylinders */ 135 Uchar dkl_ncyl[4]; /* # of data cylinders */ 136 Uchar dkl_acyl[2]; /* # of alternate cylinders */ 137 Uchar dkl_bcyl[2]; 138 Uchar dkl_nhead[4]; /* # of heads in this partition */ 139 Uchar dkl_nsect[4]; /* # of 512 byte sectors per track */ 140 Uchar dkl_intrlv[2]; /* interleave factor */ 141 Uchar dkl_skew[2]; 142 Uchar dkl_apc[2]; /* alternates per cylinder */ 143 Uchar dkl_rpm[2]; /* rotations per minute */ 144 Uchar dkl_write_reinstruct[2]; 145 Uchar dkl_read_reinstruct[2]; 146 Uchar dkl_extra[4*2]; /* for later expansions */ 147 char dkl_pad[512-(sizeof (struct x86_vtoc)+4*4+14*2)]; 148 Uchar dkl_magic[2]; /* identifies this label format */ 149 Uchar dkl_cksum[2]; /* xor checksum of sector */ 150 }; 151 152 /* 153 * One x86 PC fdisk partition record. 154 */ 155 struct pc_pr { 156 Uchar pr_status; /* Boot status */ 157 Uchar pr_head; /* Starting head # */ 158 char pr_sec_cyl[2]; /* Starting sec+cyl # */ 159 Uchar pr_type; /* Partition type */ 160 Uchar pr_e_head; /* Ending head # */ 161 char pr_e_sec_cyl[2]; /* Ending sec+cyl # */ 162 char pr_partoff[4]; /* Partition start sector # */ 163 char pr_nsect[4]; /* # of sectors in partition */ 164 }; 165 166 /* 167 * Flags and macros for above partition record. 168 */ 169 #define SEC_MASK 0x3F 170 #define GET_SEC(a) ((a) & SEC_MASK) 171 #define GET_CYL(a) ((((a) & 0xFF) >> 8) | (((a) & 0xC0) << 2)) 172 173 #define STATUS_INACT 0 /* Marked non bootable */ 174 #define STATUS_ACTIVE 0x80 /* Marked as bootable */ 175 176 #define TYPE_FREE 0 /* Unused partition */ 177 #define TYPE_DOS12 0x01 /* FAT12 fileystem */ 178 #define TYPE_XENIX 0x02 /* XENIX root */ 179 #define TYPE_XENIX2 0x03 /* XENIX usr */ 180 #define TYPE_DOS16 0x04 /* FAT16 filesystem */ 181 #define TYPE_XDOS 0x05 /* Extended DOS part */ 182 #define TYPE_DOS4 0x06 /* FAT16 >= 32 MB */ 183 #define TYPE_SOLARIS 0x82 /* Solaris x86 */ 184 #define TYPE_SOLARIS_BOOT 0xBE /* Solaris boot */ 185 #define TYPE_CDOS4 0xDB /* CPM */ 186 187 /* 188 * The first sector on a disk from a x86 PC (at offset 0 on a disk) 189 */ 190 struct pc_part { 191 char bootcode[0x1BE]; /* Master boot record */ 192 struct pc_pr part[4]; /* The 4 primary partitions */ 193 Uchar magic[2]; /* Fixed at 0x55 0xAA */ 194 }; 195