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Text File | 1992-09-04 | 10.2 KB | 316 lines | [TEXT/UNIX] |
- /*
- * Copyright (c) 1987, 1988 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 7.19 (Berkeley) 5/7/91
- */
-
- /*
- * 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 */
- u_short p_cpg; /* filesystem cylinders per group */
- } 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_FLOPPY 10 /* floppy */
-
- #ifdef DKTYPENAMES
- static char *dktypenames[] = {
- "unknown",
- "SMD",
- "MSCP",
- "old DEC",
- "SCSI",
- "ESDI",
- "ST506",
- "type 7",
- "type 8",
- "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 */
-
- #ifdef DKTYPENAMES
- static char *fstypenames[] = {
- "unused",
- "swap",
- "Version 6",
- "Version 7",
- "System V",
- "4.1BSD",
- "Eighth Edition",
- "4.2BSD",
- "MSDOS",
- 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;
- };
-
- /*
- * 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
-