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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94 34 * $FreeBSD: src/sys/sys/disklabel.h,v 1.49.2.7 2001/05/27 05:58:26 jkh Exp $ 35 * $DragonFly: src/sys/sys/disklabel32.h,v 1.28 2007/08/21 20:04:09 corecode Exp $ 36 */ 37 38 #ifndef _SYS_DISKLABEL32_H_ 39 #define _SYS_DISKLABEL32_H_ 40 41 #ifndef _SYS_TYPES_H_ 42 #include <sys/types.h> 43 #endif 44 #if defined(_KERNEL) && !defined(_SYS_SYSTM_H_) 45 #include <sys/systm.h> 46 #endif 47 #ifndef _SYS_IOCCOM_H_ 48 #include <sys/ioccom.h> 49 #endif 50 51 /* 52 * Each disk has a label which includes information about the hardware 53 * disk geometry, filesystem partitions, and drive specific information. 54 * The label is in block 0 or 1, possibly offset from the beginning 55 * to leave room for a bootstrap, etc. 56 */ 57 58 /* XXX these should be defined per controller (or drive) elsewhere, not here! */ 59 #if defined(__i386__) || defined(__amd64__) 60 #define LABELSECTOR32 1 /* sector containing label */ 61 #define LABELOFFSET32 0 /* offset of label in sector */ 62 #endif 63 64 #define DISKMAGIC32 ((u_int32_t)0x82564557) /* The disk magic number */ 65 #ifndef MAXPARTITIONS32 66 #define MAXPARTITIONS32 16 67 #endif 68 69 #define LABEL_PART 2 /* partition containing label */ 70 #define RAW_PART 2 /* partition containing whole disk */ 71 #define SWAP_PART 1 /* partition normally containing swap */ 72 73 #ifndef LOCORE 74 struct disklabel32 { 75 u_int32_t d_magic; /* the magic number */ 76 u_int16_t d_type; /* drive type */ 77 u_int16_t d_subtype; /* controller/d_type specific */ 78 char d_typename[16]; /* type name, e.g. "eagle" */ 79 80 char d_packname[16]; /* pack identifier */ 81 82 /* disk geometry: */ 83 u_int32_t d_secsize; /* # of bytes per sector */ 84 u_int32_t d_nsectors; /* # of data sectors per track */ 85 u_int32_t d_ntracks; /* # of tracks per cylinder */ 86 u_int32_t d_ncylinders; /* # of data cylinders per unit */ 87 u_int32_t d_secpercyl; /* # of data sectors per cylinder */ 88 u_int32_t d_secperunit; /* # of data sectors per unit */ 89 90 /* 91 * Spares (bad sector replacements) below are not counted in 92 * d_nsectors or d_secpercyl. Spare sectors are assumed to 93 * be physical sectors which occupy space at the end of each 94 * track and/or cylinder. 95 */ 96 u_int16_t d_sparespertrack; /* # of spare sectors per track */ 97 u_int16_t d_sparespercyl; /* # of spare sectors per cylinder */ 98 /* 99 * Alternate cylinders include maintenance, replacement, configuration 100 * description areas, etc. 101 */ 102 u_int32_t d_acylinders; /* # of alt. cylinders per unit */ 103 104 /* hardware characteristics: */ 105 /* 106 * d_interleave, d_trackskew and d_cylskew describe perturbations 107 * in the media format used to compensate for a slow controller. 108 * Interleave is physical sector interleave, set up by the 109 * formatter or controller when formatting. When interleaving is 110 * in use, logically adjacent sectors are not physically 111 * contiguous, but instead are separated by some number of 112 * sectors. It is specified as the ratio of physical sectors 113 * traversed per logical sector. Thus an interleave of 1:1 114 * implies contiguous layout, while 2:1 implies that logical 115 * sector 0 is separated by one sector from logical sector 1. 116 * d_trackskew is the offset of sector 0 on track N relative to 117 * sector 0 on track N-1 on the same cylinder. Finally, d_cylskew 118 * is the offset of sector 0 on cylinder N relative to sector 0 119 * on cylinder N-1. 120 */ 121 u_int16_t d_rpm; /* rotational speed */ 122 u_int16_t d_interleave; /* hardware sector interleave */ 123 u_int16_t d_trackskew; /* sector 0 skew, per track */ 124 u_int16_t d_cylskew; /* sector 0 skew, per cylinder */ 125 u_int32_t d_headswitch; /* head switch time, usec */ 126 u_int32_t d_trkseek; /* track-to-track seek, usec */ 127 u_int32_t d_flags; /* generic flags (now unused) */ 128 #define NDDATA32 5 129 u_int32_t d_drivedata[NDDATA32];/* drive-type specific information */ 130 #define NSPARE32 5 131 u_int32_t d_spare[NSPARE32]; /* reserved for future use */ 132 u_int32_t d_magic2; /* the magic number (again) */ 133 u_int16_t d_checksum; /* xor of data incl. partitions */ 134 135 /* filesystem and partition information: */ 136 u_int16_t d_npartitions; /* number of partitions in following */ 137 u_int32_t d_bbsize; /* size of boot area at sn0, bytes */ 138 u_int32_t d_sbsize; /* max size of fs superblock, bytes */ 139 struct partition32 { /* the partition table */ 140 u_int32_t p_size; /* number of sectors in partition */ 141 u_int32_t p_offset; /* starting sector */ 142 u_int32_t p_fsize; /* filesystem basic fragment size */ 143 u_int8_t p_fstype; /* filesystem type, see below */ 144 u_int8_t p_frag; /* filesystem fragments per block */ 145 union { 146 u_int16_t cpg; /* UFS: FS cylinders per group */ 147 u_int16_t sgs; /* LFS: FS segment shift */ 148 } __partition_u1; 149 #define p_cpg __partition_u1.cpg 150 #define p_sgs __partition_u1.sgs 151 } d_partitions[MAXPARTITIONS32];/* actually may be more */ 152 }; 153 154 static u_int16_t dkcksum32(struct disklabel32 *lp); 155 156 static __inline u_int16_t 157 dkcksum32(struct disklabel32 *lp) 158 { 159 u_int16_t *start, *end; 160 u_int16_t sum = 0; 161 162 start = (u_int16_t *)lp; 163 end = (u_int16_t *)&lp->d_partitions[lp->d_npartitions]; 164 while (start < end) 165 sum ^= *start++; 166 return (sum); 167 } 168 169 #ifdef _KERNEL 170 extern struct disklabel_ops disklabel32_ops; 171 #endif 172 173 #else /* LOCORE */ 174 /* 175 * offsets for asm boot files. 176 */ 177 .set d_secsize,40 178 .set d_nsectors,44 179 .set d_ntracks,48 180 .set d_ncylinders,52 181 .set d_secpercyl,56 182 .set d_secperunit,60 183 .set d_end_,276 /* size of disk label */ 184 #endif /* LOCORE */ 185 186 #ifndef LOCORE 187 188 /* 189 * Disk-specific ioctls. 190 */ 191 #define DIOCGDINFO32 _IOR('d', 101, struct disklabel32) /* get */ 192 #define DIOCSDINFO32 _IOW('d', 102, struct disklabel32) /* set */ 193 #define DIOCWDINFO32 _IOW('d', 103, struct disklabel32) /* set, update disk */ 194 #define DIOCGDVIRGIN32 _IOR('d', 105, struct disklabel32) /* get virgin label */ 195 196 #endif /* LOCORE */ 197 198 #endif /* !_SYS_DISKLABEL32_H_ */ 199