1 /*- 2 * Copyright (c) 1987, 1988, 1993 3 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94 30 * $FreeBSD$ 31 */ 32 33 #ifndef _SYS_DISK_BSD_H_ 34 #define _SYS_DISK_BSD_H_ 35 36 /* The disk magic number */ 37 #define BSD_MAGIC 0x82564557U 38 39 #define BSD_NPARTS_MIN 8 40 #define BSD_NPARTS_MAX 20 41 42 /* Size of bootblock area in sector-size neutral bytes */ 43 #define BSD_BOOTBLOCK_SIZE 8192 44 45 /* partition containing whole disk */ 46 #define BSD_PART_RAW 2 47 48 /* partition normally containing swap */ 49 #define BSD_PART_SWAP 1 50 51 /* Drive-type specific data size (in number of 32-bit inegrals) */ 52 #define BSD_NDRIVEDATA 5 53 54 /* Number of spare 32-bit integrals following drive-type data */ 55 #define BSD_NSPARE 5 56 57 struct disklabel { 58 uint32_t d_magic; /* the magic number */ 59 uint16_t d_type; /* drive type */ 60 uint16_t d_subtype; /* controller/d_type specific */ 61 char d_typename[16]; /* type name, e.g. "eagle" */ 62 63 char d_packname[16]; /* pack identifier */ 64 65 /* disk geometry: */ 66 uint32_t d_secsize; /* # of bytes per sector */ 67 uint32_t d_nsectors; /* # of data sectors per track */ 68 uint32_t d_ntracks; /* # of tracks per cylinder */ 69 uint32_t d_ncylinders; /* # of data cylinders per unit */ 70 uint32_t d_secpercyl; /* # of data sectors per cylinder */ 71 uint32_t d_secperunit; /* # of data sectors per unit */ 72 73 /* 74 * Spares (bad sector replacements) below are not counted in 75 * d_nsectors or d_secpercyl. Spare sectors are assumed to 76 * be physical sectors which occupy space at the end of each 77 * track and/or cylinder. 78 */ 79 uint16_t d_sparespertrack; /* # of spare sectors per track */ 80 uint16_t d_sparespercyl; /* # of spare sectors per cylinder */ 81 /* 82 * Alternate cylinders include maintenance, replacement, configuration 83 * description areas, etc. 84 */ 85 uint32_t d_acylinders; /* # of alt. cylinders per unit */ 86 87 /* hardware characteristics: */ 88 /* 89 * d_interleave, d_trackskew and d_cylskew describe perturbations 90 * in the media format used to compensate for a slow controller. 91 * Interleave is physical sector interleave, set up by the 92 * formatter or controller when formatting. When interleaving is 93 * in use, logically adjacent sectors are not physically 94 * contiguous, but instead are separated by some number of 95 * sectors. It is specified as the ratio of physical sectors 96 * traversed per logical sector. Thus an interleave of 1:1 97 * implies contiguous layout, while 2:1 implies that logical 98 * sector 0 is separated by one sector from logical sector 1. 99 * d_trackskew is the offset of sector 0 on track N relative to 100 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew 101 * is the offset of sector 0 on cylinder N relative to sector 0 102 * on cylinder N-1. 103 */ 104 uint16_t d_rpm; /* rotational speed */ 105 uint16_t d_interleave; /* hardware sector interleave */ 106 uint16_t d_trackskew; /* sector 0 skew, per track */ 107 uint16_t d_cylskew; /* sector 0 skew, per cylinder */ 108 uint32_t d_headswitch; /* head switch time, usec */ 109 uint32_t d_trkseek; /* track-to-track seek, usec */ 110 uint32_t d_flags; /* generic flags */ 111 uint32_t d_drivedata[BSD_NDRIVEDATA]; /* drive-type specific data */ 112 uint32_t d_spare[BSD_NSPARE]; /* reserved for future use */ 113 uint32_t d_magic2; /* the magic number (again) */ 114 uint16_t d_checksum; /* xor of data incl. partitions */ 115 116 /* filesystem and partition information: */ 117 uint16_t d_npartitions; /* number of partitions in following */ 118 uint32_t d_bbsize; /* size of boot area at sn0, bytes */ 119 uint32_t d_sbsize; /* max size of fs superblock, bytes */ 120 struct partition { /* the partition table */ 121 uint32_t p_size; /* number of sectors in partition */ 122 uint32_t p_offset; /* starting sector */ 123 uint32_t p_fsize; /* filesystem basic fragment size */ 124 uint8_t p_fstype; /* filesystem type, see below */ 125 uint8_t p_frag; /* filesystem fragments per block */ 126 uint16_t p_cpg; /* filesystem cylinders per group */ 127 } d_partitions[BSD_NPARTS_MIN]; /* actually may be more */ 128 }; 129 #ifdef CTASSERT 130 CTASSERT(sizeof(struct disklabel) == 148 + BSD_NPARTS_MIN * 16); 131 #endif 132 133 /* d_type values: */ 134 #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */ 135 #define DTYPE_MSCP 2 /* MSCP */ 136 #define DTYPE_DEC 3 /* other DEC (rk, rl) */ 137 #define DTYPE_SCSI 4 /* SCSI */ 138 #define DTYPE_ESDI 5 /* ESDI interface */ 139 #define DTYPE_ST506 6 /* ST506 etc. */ 140 #define DTYPE_HPIB 7 /* CS/80 on HP-IB */ 141 #define DTYPE_HPFL 8 /* HP Fiber-link */ 142 #define DTYPE_FLOPPY 10 /* floppy */ 143 #define DTYPE_CCD 11 /* concatenated disk */ 144 #define DTYPE_VINUM 12 /* vinum volume */ 145 #define DTYPE_DOC2K 13 /* Msys DiskOnChip */ 146 #define DTYPE_RAID 14 /* CMU RAIDFrame */ 147 #define DTYPE_JFS2 16 /* IBM JFS 2 */ 148 149 /* 150 * Filesystem type and version. 151 * Used to interpret other filesystem-specific 152 * per-partition information. 153 */ 154 #define FS_UNUSED 0 /* unused */ 155 #define FS_SWAP 1 /* swap */ 156 #define FS_V6 2 /* Sixth Edition */ 157 #define FS_V7 3 /* Seventh Edition */ 158 #define FS_SYSV 4 /* System V */ 159 #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */ 160 #define FS_V8 6 /* Eighth Edition, 4K blocks */ 161 #define FS_BSDFFS 7 /* 4.2BSD fast filesystem */ 162 #define FS_MSDOS 8 /* MSDOS filesystem */ 163 #define FS_BSDLFS 9 /* 4.4BSD log-structured filesystem */ 164 #define FS_OTHER 10 /* in use, but unknown/unsupported */ 165 #define FS_HPFS 11 /* OS/2 high-performance filesystem */ 166 #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */ 167 #define FS_BOOT 13 /* partition contains bootstrap */ 168 #define FS_VINUM 14 /* Vinum drive */ 169 #define FS_RAID 15 /* RAIDFrame drive */ 170 #define FS_FILECORE 16 /* Acorn Filecore Filing System */ 171 #define FS_EXT2FS 17 /* ext2fs */ 172 #define FS_NTFS 18 /* Windows/NT file system */ 173 #define FS_CCD 20 /* concatenated disk component */ 174 #define FS_JFS2 21 /* IBM JFS2 */ 175 #define FS_HAMMER 22 /* DragonFlyBSD Hammer FS */ 176 #define FS_HAMMER2 23 /* DragonFlyBSD Hammer2 FS */ 177 #define FS_UDF 24 /* UDF */ 178 #define FS_EFS 26 /* SGI's Extent File system */ 179 #define FS_ZFS 27 /* Sun's ZFS */ 180 #define FS_NANDFS 30 /* FreeBSD nandfs (NiLFS derived) */ 181 182 /* 183 * flags shared by various drives: 184 */ 185 #define D_REMOVABLE 0x01 /* removable media */ 186 #define D_ECC 0x02 /* supports ECC */ 187 #define D_BADSECT 0x04 /* supports bad sector forw. */ 188 #define D_RAMDISK 0x08 /* disk emulator */ 189 #define D_CHAIN 0x10 /* can do back-back transfers */ 190 191 #endif /* !_SYS_DISK_BSD_H_ */ 192