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 * 4. 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_DISKLABEL_H_ 34 #define _SYS_DISKLABEL_H_ 35 36 #ifndef _KERNEL 37 #include <sys/types.h> 38 #endif 39 #include <sys/ioccom.h> 40 41 /* 42 * Disk description table, see disktab(5) 43 */ 44 #define _PATH_DISKTAB "/etc/disktab" 45 46 /* 47 * Each disk has a label which includes information about the hardware 48 * disk geometry, filesystem partitions, and drive specific information. 49 * The label is in block 0 or 1, possibly offset from the beginning 50 * to leave room for a bootstrap, etc. 51 */ 52 53 /* XXX these should be defined per controller (or drive) elsewhere, not here! */ 54 #if defined(__i386__) || defined(__amd64__) || defined(__arm__) || \ 55 defined(__powerpc__) || defined(__mips__) 56 #define LABELSECTOR 1 /* sector containing label */ 57 #define LABELOFFSET 0 /* offset of label in sector */ 58 #endif 59 60 #define DISKMAGIC ((u_int32_t)0x82564557) /* The disk magic number */ 61 #ifndef MAXPARTITIONS 62 #define MAXPARTITIONS 8 63 #endif 64 65 /* Size of bootblock area in sector-size neutral bytes */ 66 #define BBSIZE 8192 67 68 #define LABEL_PART 2 /* partition containing label */ 69 #define RAW_PART 2 /* partition containing whole disk */ 70 #define SWAP_PART 1 /* partition normally containing swap */ 71 72 struct disklabel { 73 u_int32_t d_magic; /* the magic number */ 74 u_int16_t d_type; /* drive type */ 75 u_int16_t d_subtype; /* controller/d_type specific */ 76 char d_typename[16]; /* type name, e.g. "eagle" */ 77 78 char d_packname[16]; /* pack identifier */ 79 80 /* disk geometry: */ 81 u_int32_t d_secsize; /* # of bytes per sector */ 82 u_int32_t d_nsectors; /* # of data sectors per track */ 83 u_int32_t d_ntracks; /* # of tracks per cylinder */ 84 u_int32_t d_ncylinders; /* # of data cylinders per unit */ 85 u_int32_t d_secpercyl; /* # of data sectors per cylinder */ 86 u_int32_t d_secperunit; /* # of data sectors per unit */ 87 88 /* 89 * Spares (bad sector replacements) below are not counted in 90 * d_nsectors or d_secpercyl. Spare sectors are assumed to 91 * be physical sectors which occupy space at the end of each 92 * track and/or cylinder. 93 */ 94 u_int16_t d_sparespertrack; /* # of spare sectors per track */ 95 u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */ 96 /* 97 * Alternate cylinders include maintenance, replacement, configuration 98 * description areas, etc. 99 */ 100 u_int32_t d_acylinders; /* # of alt. cylinders per unit */ 101 102 /* hardware characteristics: */ 103 /* 104 * d_interleave, d_trackskew and d_cylskew describe perturbations 105 * in the media format used to compensate for a slow controller. 106 * Interleave is physical sector interleave, set up by the 107 * formatter or controller when formatting. When interleaving is 108 * in use, logically adjacent sectors are not physically 109 * contiguous, but instead are separated by some number of 110 * sectors. It is specified as the ratio of physical sectors 111 * traversed per logical sector. Thus an interleave of 1:1 112 * implies contiguous layout, while 2:1 implies that logical 113 * sector 0 is separated by one sector from logical sector 1. 114 * d_trackskew is the offset of sector 0 on track N relative to 115 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew 116 * is the offset of sector 0 on cylinder N relative to sector 0 117 * on cylinder N-1. 118 */ 119 u_int16_t d_rpm; /* rotational speed */ 120 u_int16_t d_interleave; /* hardware sector interleave */ 121 u_int16_t d_trackskew; /* sector 0 skew, per track */ 122 u_int16_t d_cylskew; /* sector 0 skew, per cylinder */ 123 u_int32_t d_headswitch; /* head switch time, usec */ 124 u_int32_t d_trkseek; /* track-to-track seek, usec */ 125 u_int32_t d_flags; /* generic flags */ 126 #define NDDATA 5 127 u_int32_t d_drivedata[NDDATA]; /* drive-type specific information */ 128 #define NSPARE 5 129 u_int32_t d_spare[NSPARE]; /* reserved for future use */ 130 u_int32_t d_magic2; /* the magic number (again) */ 131 u_int16_t d_checksum; /* xor of data incl. partitions */ 132 133 /* filesystem and partition information: */ 134 u_int16_t d_npartitions; /* number of partitions in following */ 135 u_int32_t d_bbsize; /* size of boot area at sn0, bytes */ 136 u_int32_t d_sbsize; /* max size of fs superblock, bytes */ 137 struct partition { /* the partition table */ 138 u_int32_t p_size; /* number of sectors in partition */ 139 u_int32_t p_offset; /* starting sector */ 140 u_int32_t p_fsize; /* filesystem basic fragment size */ 141 u_int8_t p_fstype; /* filesystem type, see below */ 142 u_int8_t p_frag; /* filesystem fragments per block */ 143 u_int16_t p_cpg; /* filesystem cylinders per group */ 144 } d_partitions[MAXPARTITIONS]; /* actually may be more */ 145 }; 146 147 #ifdef CTASSERT 148 CTASSERT(sizeof(struct disklabel) == 148 + MAXPARTITIONS * 16); 149 #endif 150 151 static __inline u_int16_t dkcksum(struct disklabel *lp); 152 static __inline u_int16_t 153 dkcksum(struct disklabel *lp) 154 { 155 u_int16_t *start, *end; 156 u_int16_t sum = 0; 157 158 start = (u_int16_t *)lp; 159 end = (u_int16_t *)&lp->d_partitions[lp->d_npartitions]; 160 while (start < end) 161 sum ^= *start++; 162 return (sum); 163 } 164 165 166 /* d_type values: */ 167 #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */ 168 #define DTYPE_MSCP 2 /* MSCP */ 169 #define DTYPE_DEC 3 /* other DEC (rk, rl) */ 170 #define DTYPE_SCSI 4 /* SCSI */ 171 #define DTYPE_ESDI 5 /* ESDI interface */ 172 #define DTYPE_ST506 6 /* ST506 etc. */ 173 #define DTYPE_HPIB 7 /* CS/80 on HP-IB */ 174 #define DTYPE_HPFL 8 /* HP Fiber-link */ 175 #define DTYPE_FLOPPY 10 /* floppy */ 176 #define DTYPE_CCD 11 /* concatenated disk */ 177 #define DTYPE_VINUM 12 /* vinum volume */ 178 #define DTYPE_DOC2K 13 /* Msys DiskOnChip */ 179 #define DTYPE_RAID 14 /* CMU RAIDFrame */ 180 #define DTYPE_JFS2 16 /* IBM JFS 2 */ 181 182 #ifdef DKTYPENAMES 183 static const char *dktypenames[] = { 184 "unknown", 185 "SMD", 186 "MSCP", 187 "old DEC", 188 "SCSI", 189 "ESDI", 190 "ST506", 191 "HP-IB", 192 "HP-FL", 193 "type 9", 194 "floppy", 195 "CCD", 196 "Vinum", 197 "DOC2K", 198 "Raid", 199 "?", 200 "jfs", 201 NULL 202 }; 203 #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1) 204 #endif 205 206 /* 207 * Filesystem type and version. 208 * Used to interpret other filesystem-specific 209 * per-partition information. 210 */ 211 #define FS_UNUSED 0 /* unused */ 212 #define FS_SWAP 1 /* swap */ 213 #define FS_V6 2 /* Sixth Edition */ 214 #define FS_V7 3 /* Seventh Edition */ 215 #define FS_SYSV 4 /* System V */ 216 #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */ 217 #define FS_V8 6 /* Eighth Edition, 4K blocks */ 218 #define FS_BSDFFS 7 /* 4.2BSD fast filesystem */ 219 #define FS_MSDOS 8 /* MSDOS filesystem */ 220 #define FS_BSDLFS 9 /* 4.4BSD log-structured filesystem */ 221 #define FS_OTHER 10 /* in use, but unknown/unsupported */ 222 #define FS_HPFS 11 /* OS/2 high-performance filesystem */ 223 #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */ 224 #define FS_BOOT 13 /* partition contains bootstrap */ 225 #define FS_VINUM 14 /* Vinum drive */ 226 #define FS_RAID 15 /* RAIDFrame drive */ 227 #define FS_FILECORE 16 /* Acorn Filecore Filing System */ 228 #define FS_EXT2FS 17 /* ext2fs */ 229 #define FS_NTFS 18 /* Windows/NT file system */ 230 #define FS_CCD 20 /* concatenated disk component */ 231 #define FS_JFS2 21 /* IBM JFS2 */ 232 #define FS_HAMMER 22 /* DragonFlyBSD Hammer FS */ 233 #define FS_HAMMER2 23 /* DragonFlyBSD Hammer2 FS */ 234 #define FS_UDF 24 /* UDF */ 235 #define FS_EFS 26 /* SGI's Extent File system */ 236 #define FS_ZFS 27 /* Sun's ZFS */ 237 #define FS_NANDFS 30 /* FreeBSD nandfs (NiLFS derived) */ 238 239 #ifdef FSTYPENAMES 240 static const char *fstypenames[] = { 241 "unused", 242 "swap", 243 "Version 6", 244 "Version 7", 245 "System V", 246 "4.1BSD", 247 "Eighth Edition", 248 "4.2BSD", 249 "MSDOS", 250 "4.4LFS", 251 "unknown", 252 "HPFS", 253 "ISO9660", 254 "boot", 255 "vinum", 256 "raid", 257 "Filecore", 258 "EXT2FS", 259 "NTFS", 260 "?", 261 "ccd", 262 "jfs", 263 "HAMMER", 264 "HAMMER2", 265 "UDF", 266 "?", 267 "EFS", 268 "ZFS", 269 "?", 270 "?", 271 "nandfs", 272 NULL 273 }; 274 #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1) 275 #endif 276 277 /* 278 * flags shared by various drives: 279 */ 280 #define D_REMOVABLE 0x01 /* removable media */ 281 #define D_ECC 0x02 /* supports ECC */ 282 #define D_BADSECT 0x04 /* supports bad sector forw. */ 283 #define D_RAMDISK 0x08 /* disk emulator */ 284 #define D_CHAIN 0x10 /* can do back-back transfers */ 285 286 /* 287 * NB: <sys/disk.h> defines ioctls from 'd'/128 and up. 288 */ 289 290 /* 291 * Functions for proper encoding/decoding of struct disklabel into/from 292 * bytestring. 293 */ 294 void bsd_partition_le_dec(u_char *ptr, struct partition *d); 295 int bsd_disklabel_le_dec(u_char *ptr, struct disklabel *d, int maxpart); 296 void bsd_partition_le_enc(u_char *ptr, struct partition *d); 297 void bsd_disklabel_le_enc(u_char *ptr, struct disklabel *d); 298 299 #ifndef _KERNEL 300 __BEGIN_DECLS 301 struct disklabel *getdiskbyname(const char *); 302 __END_DECLS 303 #endif 304 305 #endif /* !_SYS_DISKLABEL_H_ */ 306