/* * Copyright (c) 1987, 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)disklabel.h 8.1 (Berkeley) 6/2/93 * $Id: disklabel.h,v 1.16 1995/05/30 08:14:17 rgrimes Exp $ */ #ifndef _SYS_DISKLABEL_H_ #define _SYS_DISKLABEL_H_ /* * Disk description table, see disktab(5) */ #define _PATH_DISKTAB "/etc/disktab" #define DISKTAB "/etc/disktab" /* deprecated */ /* * Each disk has a label which includes information about the hardware * disk geometry, filesystem partitions, and drive specific information. * The label is in block 0 or 1, possibly offset from the beginning * to leave room for a bootstrap, etc. */ /* XXX these should be defined per controller (or drive) elsewhere, not here! */ #ifdef __i386__ #define LABELSECTOR 1 /* sector containing label */ #define LABELOFFSET 0 /* offset of label in sector */ #endif #ifndef LABELSECTOR #define LABELSECTOR 0 /* sector containing label */ #endif #ifndef LABELOFFSET #define LABELOFFSET 64 /* offset of label in sector */ #endif #define DISKMAGIC ((u_long) 0x82564557) /* The disk magic number */ #ifndef MAXPARTITIONS #define MAXPARTITIONS 8 #endif #define LABEL_PART 2 /* partition containing label */ #define RAW_PART 2 /* partition containing whole disk */ #define SWAP_PART 1 /* partition normally containing swap */ #ifndef LOCORE struct disklabel { u_long d_magic; /* the magic number */ short d_type; /* drive type */ short d_subtype; /* controller/d_type specific */ char d_typename[16]; /* type name, e.g. "eagle" */ /* * d_packname contains the pack identifier and is returned when * the disklabel is read off the disk or in-core copy. * d_boot0 and d_boot1 are the (optional) names of the * primary (block 0) and secondary (block 1-15) bootstraps * as found in /usr/mdec. These are returned when using * getdiskbyname(3) to retrieve the values from /etc/disktab. */ #if defined(KERNEL) || defined(STANDALONE) char d_packname[16]; /* pack identifier */ #else union { char un_d_packname[16]; /* pack identifier */ struct { char *un_d_boot0; /* primary bootstrap name */ char *un_d_boot1; /* secondary bootstrap name */ } un_b; } d_un; #define d_packname d_un.un_d_packname #define d_boot0 d_un.un_b.un_d_boot0 #define d_boot1 d_un.un_b.un_d_boot1 #endif /* ! KERNEL or STANDALONE */ /* disk geometry: */ u_long d_secsize; /* # of bytes per sector */ u_long d_nsectors; /* # of data sectors per track */ u_long d_ntracks; /* # of tracks per cylinder */ u_long d_ncylinders; /* # of data cylinders per unit */ u_long d_secpercyl; /* # of data sectors per cylinder */ u_long d_secperunit; /* # of data sectors per unit */ /* * Spares (bad sector replacements) below * are not counted in d_nsectors or d_secpercyl. * Spare sectors are assumed to be physical sectors * which occupy space at the end of each track and/or cylinder. */ u_short d_sparespertrack; /* # of spare sectors per track */ u_short d_sparespercyl; /* # of spare sectors per cylinder */ /* * Alternate cylinders include maintenance, replacement, * configuration description areas, etc. */ u_long d_acylinders; /* # of alt. cylinders per unit */ /* hardware characteristics: */ /* * d_interleave, d_trackskew and d_cylskew describe perturbations * in the media format used to compensate for a slow controller. * Interleave is physical sector interleave, set up by the formatter * or controller when formatting. When interleaving is in use, * logically adjacent sectors are not physically contiguous, * but instead are separated by some number of sectors. * It is specified as the ratio of physical sectors traversed * per logical sector. Thus an interleave of 1:1 implies contiguous * layout, while 2:1 implies that logical sector 0 is separated * by one sector from logical sector 1. * d_trackskew is the offset of sector 0 on track N * relative to sector 0 on track N-1 on the same cylinder. * Finally, d_cylskew is the offset of sector 0 on cylinder N * relative to sector 0 on cylinder N-1. */ u_short d_rpm; /* rotational speed */ u_short d_interleave; /* hardware sector interleave */ u_short d_trackskew; /* sector 0 skew, per track */ u_short d_cylskew; /* sector 0 skew, per cylinder */ u_long d_headswitch; /* head switch time, usec */ u_long d_trkseek; /* track-to-track seek, usec */ u_long d_flags; /* generic flags */ #define NDDATA 5 u_long d_drivedata[NDDATA]; /* drive-type specific information */ #define NSPARE 5 u_long d_spare[NSPARE]; /* reserved for future use */ u_long d_magic2; /* the magic number (again) */ u_short d_checksum; /* xor of data incl. partitions */ /* filesystem and partition information: */ u_short d_npartitions; /* number of partitions in following */ u_long d_bbsize; /* size of boot area at sn0, bytes */ u_long d_sbsize; /* max size of fs superblock, bytes */ struct partition { /* the partition table */ u_long p_size; /* number of sectors in partition */ u_long p_offset; /* starting sector */ u_long p_fsize; /* filesystem basic fragment size */ u_char p_fstype; /* filesystem type, see below */ u_char p_frag; /* filesystem fragments per block */ union { u_short cpg; /* UFS: FS cylinders per group */ u_short sgs; /* LFS: FS segment shift */ } __partition_u1; #define p_cpg __partition_u1.cpg #define p_sgs __partition_u1.sgs } d_partitions[MAXPARTITIONS]; /* actually may be more */ }; #else /* LOCORE */ /* * offsets for asm boot files. */ .set d_secsize,40 .set d_nsectors,44 .set d_ntracks,48 .set d_ncylinders,52 .set d_secpercyl,56 .set d_secperunit,60 .set d_end_,276 /* size of disk label */ #endif /* LOCORE */ /* d_type values: */ #define DTYPE_SMD 1 /* SMD, XSMD; VAX hp/up */ #define DTYPE_MSCP 2 /* MSCP */ #define DTYPE_DEC 3 /* other DEC (rk, rl) */ #define DTYPE_SCSI 4 /* SCSI */ #define DTYPE_ESDI 5 /* ESDI interface */ #define DTYPE_ST506 6 /* ST506 etc. */ #define DTYPE_HPIB 7 /* CS/80 on HP-IB */ #define DTYPE_HPFL 8 /* HP Fiber-link */ #define DTYPE_FLOPPY 10 /* floppy */ #ifdef DKTYPENAMES static char *dktypenames[] = { "unknown", "SMD", "MSCP", "old DEC", "SCSI", "ESDI", "ST506", "HP-IB", "HP-FL", "type 9", "floppy", 0 }; #define DKMAXTYPES (sizeof(dktypenames) / sizeof(dktypenames[0]) - 1) #endif /* * Filesystem type and version. * Used to interpret other filesystem-specific * per-partition information. */ #define FS_UNUSED 0 /* unused */ #define FS_SWAP 1 /* swap */ #define FS_V6 2 /* Sixth Edition */ #define FS_V7 3 /* Seventh Edition */ #define FS_SYSV 4 /* System V */ #define FS_V71K 5 /* V7 with 1K blocks (4.1, 2.9) */ #define FS_V8 6 /* Eighth Edition, 4K blocks */ #define FS_BSDFFS 7 /* 4.2BSD fast file system */ #define FS_MSDOS 8 /* MSDOS file system */ #define FS_BSDLFS 9 /* 4.4BSD log-structured file system */ #define FS_OTHER 10 /* in use, but unknown/unsupported */ #define FS_HPFS 11 /* OS/2 high-performance file system */ #define FS_ISO9660 12 /* ISO 9660, normally CD-ROM */ #define FS_BOOT 13 /* partition contains bootstrap */ #ifdef DKTYPENAMES static char *fstypenames[] = { "unused", "swap", "Version 6", "Version 7", "System V", "4.1BSD", "Eighth Edition", "4.2BSD", "MSDOS", "4.4LFS", "unknown", "HPFS", "ISO9660", "boot", 0 }; #define FSMAXTYPES (sizeof(fstypenames) / sizeof(fstypenames[0]) - 1) #endif /* * flags shared by various drives: */ #define D_REMOVABLE 0x01 /* removable media */ #define D_ECC 0x02 /* supports ECC */ #define D_BADSECT 0x04 /* supports bad sector forw. */ #define D_RAMDISK 0x08 /* disk emulator */ #define D_CHAIN 0x10 /* can do back-back transfers */ /* * Drive data for SMD. */ #define d_smdflags d_drivedata[0] #define D_SSE 0x1 /* supports skip sectoring */ #define d_mindist d_drivedata[1] #define d_maxdist d_drivedata[2] #define d_sdist d_drivedata[3] /* * Drive data for ST506. */ #define d_precompcyl d_drivedata[0] #define d_gap3 d_drivedata[1] /* used only when formatting */ /* * Drive data for SCSI. */ #define d_blind d_drivedata[0] #ifndef LOCORE /* * Structure used to perform a format * or other raw operation, returning data * and/or register values. * Register identification and format * are device- and driver-dependent. */ struct format_op { char *df_buf; int df_count; /* value-result */ daddr_t df_startblk; int df_reg[8]; /* result */ }; /* * Structure used internally to retrieve * information about a partition on a disk. */ struct partinfo { struct disklabel *disklab; struct partition *part; }; /* DOS partition table -- located in boot block */ #define DOSBBSECTOR 0 /* DOS boot block relative sector number */ #define DOSPARTOFF 446 #define NDOSPART 4 #define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */ struct dos_partition { unsigned char dp_flag; /* bootstrap flags */ unsigned char dp_shd; /* starting head */ unsigned char dp_ssect; /* starting sector */ unsigned char dp_scyl; /* starting cylinder */ unsigned char dp_typ; /* partition type */ unsigned char dp_ehd; /* end head */ unsigned char dp_esect; /* end sector */ unsigned char dp_ecyl; /* end cylinder */ unsigned long dp_start; /* absolute starting sector number */ unsigned long dp_size; /* partition size in sectors */ }; #define DPSECT(s) ((s) & 0x3f) /* isolate relevant bits of sector */ #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */ /* * Disk-specific ioctls. */ /* get and set disklabel; DIOCGPART used internally */ #define DIOCGDINFO _IOR('d', 101, struct disklabel)/* get */ #define DIOCSDINFO _IOW('d', 102, struct disklabel)/* set */ #define DIOCWDINFO _IOW('d', 103, struct disklabel)/* set, update disk */ #define DIOCGPART _IOW('d', 104, struct partinfo) /* get partition */ /* do format operation, read or write */ #define DIOCRFORMAT _IOWR('d', 105, struct format_op) #define DIOCWFORMAT _IOWR('d', 106, struct format_op) #define DIOCSSTEP _IOW('d', 107, int) /* set step rate */ #define DIOCSRETRIES _IOW('d', 108, int) /* set # of retries */ #define DIOCWLABEL _IOW('d', 109, int) /* write en/disable label */ #define DIOCSBAD _IOW('d', 110, struct dkbad) /* set kernel dkbad */ #define DIOCSBADSCAN _IOW('d', 111, int) /* set badscan mode */ /* * XXX encoding of disk minor numbers, should be elsewhere. * * See for a possibly better encoding. * * "cpio -H newc" can be used to back up device files with large minor * numbers (but not ones >= 2^31). Old cpio formats and all tar formats * don't have enough bits, and cpio and tar don't notice the lossage. * There are also some sign extension bugs. */ /* 3 2 1 0 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 _________________________________________________________________ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ----------------------------------------------------------------- | TYPE | SLICE | MAJOR? | UNIT |PART | ----------------------------------------------------------------- | TYPE |PART2| SLICE | MAJOR? | UNIT |PART | <-soon ----------------------------------------------------------------- I want 3 more part bits (taken from 'TYPE' (useless as it is) (JRE) */ #define dkmakeminor(unit, slice, part) \ (((slice) << 16) | ((unit) << 3) | (part)) #define dkmodpart(dev, part) (((dev) & ~(dev_t)7) | (part)) #define dkmodslice(dev, slice) (((dev) & ~(dev_t)0x1f0000) | ((slice) << 16)) #define dkpart(dev) (minor(dev) & 7) #define dkslice(dev) ((minor(dev) >> 16) & 0x1f) #define dktype(dev) ((minor(dev) >> 21) & 0x7ff) #define dkunit(dev) ((minor(dev) >> 3) & 0x1f) #ifdef KERNEL /* * We're not ready to use . */ #include int bounds_check_with_label __P((struct buf *bp, struct disklabel *lp, int wlabel)); void diskerr __P((struct buf *bp, char *dname, char *what, int pri, int blkdone, struct disklabel *lp)); void disksort __P((struct buf *ap, struct buf *bp)); u_int dkcksum __P((struct disklabel *lp)); char *readdisklabel __P((dev_t dev, d_strategy_t *strat, struct disklabel *lp)); int setdisklabel __P((struct disklabel *olp, struct disklabel *nlp, u_long openmask)); int writedisklabel __P((dev_t dev, d_strategy_t *strat, struct disklabel *lp)); #endif /* KERNEL */ #endif /* LOCORE */ #if !defined(KERNEL) && !defined(LOCORE) #include __BEGIN_DECLS struct disklabel *getdiskbyname __P((const char *)); __END_DECLS #endif #endif /* !_SYS_DISKLABEL_H_ */