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 30 #ifndef _SYS_DISK_BSD_H_ 31 #define _SYS_DISK_BSD_H_ 32 33 #include <sys/types.h> 34 35 /* The disk magic number */ 36 #define BSD_MAGIC 0x82564557U 37 38 #define BSD_NPARTS_MIN 8 39 #define BSD_NPARTS_MAX 20 40 41 /* Size of bootblock area in sector-size neutral bytes */ 42 #define BSD_BOOTBLOCK_SIZE 8192 43 44 /* partition containing whole disk */ 45 #define BSD_PART_RAW 2 46 47 /* partition normally containing swap */ 48 #define BSD_PART_SWAP 1 49 50 /* Drive-type specific data size (in number of 32-bit inegrals) */ 51 #define BSD_NDRIVEDATA 5 52 53 /* Number of spare 32-bit integrals following drive-type data */ 54 #define BSD_NSPARE 5 55 56 struct disklabel { 57 uint32_t d_magic; /* the magic number */ 58 uint16_t d_type; /* drive type */ 59 uint16_t d_subtype; /* controller/d_type specific */ 60 char d_typename[16]; /* type name, e.g. "eagle" */ 61 62 char d_packname[16]; /* pack identifier */ 63 64 /* disk geometry: */ 65 uint32_t d_secsize; /* # of bytes per sector */ 66 uint32_t d_nsectors; /* # of data sectors per track */ 67 uint32_t d_ntracks; /* # of tracks per cylinder */ 68 uint32_t d_ncylinders; /* # of data cylinders per unit */ 69 uint32_t d_secpercyl; /* # of data sectors per cylinder */ 70 uint32_t d_secperunit; /* # of data sectors per unit */ 71 72 /* 73 * Spares (bad sector replacements) below are not counted in 74 * d_nsectors or d_secpercyl. Spare sectors are assumed to 75 * be physical sectors which occupy space at the end of each 76 * track and/or cylinder. 77 */ 78 uint16_t d_sparespertrack; /* # of spare sectors per track */ 79 uint16_t d_sparespercyl; /* # of spare sectors per cylinder */ 80 /* 81 * Alternate cylinders include maintenance, replacement, configuration 82 * description areas, etc. 83 */ 84 uint32_t d_acylinders; /* # of alt. cylinders per unit */ 85 86 /* hardware characteristics: */ 87 /* 88 * d_interleave, d_trackskew and d_cylskew describe perturbations 89 * in the media format used to compensate for a slow controller. 90 * Interleave is physical sector interleave, set up by the 91 * formatter or controller when formatting. When interleaving is 92 * in use, logically adjacent sectors are not physically 93 * contiguous, but instead are separated by some number of 94 * sectors. It is specified as the ratio of physical sectors 95 * traversed per logical sector. Thus an interleave of 1:1 96 * implies contiguous layout, while 2:1 implies that logical 97 * sector 0 is separated by one sector from logical sector 1. 98 * d_trackskew is the offset of sector 0 on track N relative to 99 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew 100 * is the offset of sector 0 on cylinder N relative to sector 0 101 * on cylinder N-1. 102 */ 103 uint16_t d_rpm; /* rotational speed */ 104 uint16_t d_interleave; /* hardware sector interleave */ 105 uint16_t d_trackskew; /* sector 0 skew, per track */ 106 uint16_t d_cylskew; /* sector 0 skew, per cylinder */ 107 uint32_t d_headswitch; /* head switch time, usec */ 108 uint32_t d_trkseek; /* track-to-track seek, usec */ 109 uint32_t d_flags; /* generic flags */ 110 uint32_t d_drivedata[BSD_NDRIVEDATA]; /* drive-type specific data */ 111 uint32_t d_spare[BSD_NSPARE]; /* reserved for future use */ 112 uint32_t d_magic2; /* the magic number (again) */ 113 uint16_t d_checksum; /* xor of data incl. partitions */ 114 115 /* filesystem and partition information: */ 116 uint16_t d_npartitions; /* number of partitions in following */ 117 uint32_t d_bbsize; /* size of boot area at sn0, bytes */ 118 uint32_t d_sbsize; /* max size of fs superblock, bytes */ 119 struct partition { /* the partition table */ 120 uint32_t p_size; /* number of sectors in partition */ 121 uint32_t p_offset; /* starting sector */ 122 uint32_t p_fsize; /* filesystem basic fragment size */ 123 uint8_t p_fstype; /* filesystem type, see below */ 124 uint8_t p_frag; /* filesystem fragments per block */ 125 uint16_t p_cpg; /* filesystem cylinders per group */ 126 } d_partitions[BSD_NPARTS_MIN]; /* actually may be more */ 127 }; 128 #ifdef CTASSERT 129 CTASSERT(sizeof(struct disklabel) == 148 + BSD_NPARTS_MIN * 16); 130 #endif 131 132 /* d_type values: */ 133 #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */ 134 #define DTYPE_MSCP 2 /* MSCP */ 135 #define DTYPE_DEC 3 /* other DEC (rk, rl) */ 136 #define DTYPE_SCSI 4 /* SCSI */ 137 #define DTYPE_ESDI 5 /* ESDI interface */ 138 #define DTYPE_ST506 6 /* ST506 etc. */ 139 #define DTYPE_HPIB 7 /* CS/80 on HP-IB */ 140 #define DTYPE_HPFL 8 /* HP Fiber-link */ 141 #define DTYPE_FLOPPY 10 /* floppy */ 142 #define DTYPE_CCD 11 /* concatenated disk */ 143 #define DTYPE_VINUM 12 /* vinum volume */ 144 #define DTYPE_DOC2K 13 /* Msys DiskOnChip */ 145 #define DTYPE_RAID 14 /* CMU RAIDFrame */ 146 #define DTYPE_JFS2 16 /* IBM JFS 2 */ 147 148 /* 149 * Filesystem type and version. 150 * Used to interpret other filesystem-specific 151 * per-partition information. 152 */ 153 #define FS_UNUSED 0 /* unused */ 154 #define FS_SWAP 1 /* swap */ 155 #define FS_V6 2 /* Sixth Edition */ 156 #define FS_V7 3 /* Seventh Edition */ 157 #define FS_SYSV 4 /* System V */ 158 #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */ 159 #define FS_V8 6 /* Eighth Edition, 4K blocks */ 160 #define FS_BSDFFS 7 /* 4.2BSD fast filesystem */ 161 #define FS_MSDOS 8 /* MSDOS filesystem */ 162 #define FS_BSDLFS 9 /* 4.4BSD log-structured filesystem */ 163 #define FS_OTHER 10 /* in use, but unknown/unsupported */ 164 #define FS_HPFS 11 /* OS/2 high-performance filesystem */ 165 #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */ 166 #define FS_BOOT 13 /* partition contains bootstrap */ 167 #define FS_VINUM 14 /* Vinum drive */ 168 #define FS_RAID 15 /* RAIDFrame drive */ 169 #define FS_FILECORE 16 /* Acorn Filecore Filing System */ 170 #define FS_EXT2FS 17 /* ext2fs */ 171 #define FS_NTFS 18 /* Windows/NT file system */ 172 #define FS_CCD 20 /* concatenated disk component */ 173 #define FS_JFS2 21 /* IBM JFS2 */ 174 #define FS_HAMMER 22 /* DragonFlyBSD Hammer FS */ 175 #define FS_HAMMER2 23 /* DragonFlyBSD Hammer2 FS */ 176 #define FS_UDF 24 /* UDF */ 177 #define FS_EFS 26 /* SGI's Extent File system */ 178 #define FS_ZFS 27 /* Sun's ZFS */ 179 #define FS_NANDFS 30 /* FreeBSD nandfs (NiLFS derived) */ 180 181 /* 182 * flags shared by various drives: 183 */ 184 #define D_REMOVABLE 0x01 /* removable media */ 185 #define D_ECC 0x02 /* supports ECC */ 186 #define D_BADSECT 0x04 /* supports bad sector forw. */ 187 #define D_RAMDISK 0x08 /* disk emulator */ 188 #define D_CHAIN 0x10 /* can do back-back transfers */ 189 190 #endif /* !_SYS_DISK_BSD_H_ */ 191