/*
* 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
* $Id$
*/
/*
* 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
#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 */
};
struct cpu_disklabel {
};
#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 */
/* d_subtype values: */
#define DSTYPE_INDOSPART 0x8 /* is inside dos partition */
#define DSTYPE_DOSPART(s) ((s) & 3) /* dos partition number */
#define DSTYPE_GEOMETRY 0x10 /* drive params in label */
#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
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 */
#define DOSPTYP_386BSD 0xa5 /* 386BSD 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 */
};
extern struct dos_partition dos_partitions[NDOSPART];
#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 */
#endif /* LOCORE */
#if !defined(KERNEL) && !defined(LOCORE)
#include <sys/cdefs.h>
__BEGIN_DECLS
struct disklabel *getdiskbyname __P((const char *));
__END_DECLS
#endif
