FreeBSD/Linux Kernel Cross Reference
sys/bsd/sys/disklabel.h

     /*
      * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
    /*
     * 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 8.2 (Berkeley) 7/10/94
     */
    #ifndef _SYS_DISKLABEL_H_
    #define _SYS_DISKLABEL_H_
    
    #include <sys/appleapiopts.h>
    
    #ifdef __APPLE_API_OBSOLETE
    
    /*
     * 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 location of the label, as well as the number of partitions the
     * label can describe and the number of the "whole disk" (raw)
     * paritition are machine dependent.
     */
    #include <machine/disklabel.h>
    
    /*
     * The absolute maximum number of disk partitions allowed.
     * This is the maximum value of MAXPARTITIONS for which 'struct disklabel'
     * is <= DEV_BSIZE bytes long.  If MAXPARTITIONS is greater than this, beware.
     */
    #define MAXMAXPARTITIONS        22
    #if MAXPARTITIONS > MAXMAXPARTITIONS
    #warning beware: MAXPARTITIONS bigger than MAXMAXPARTITIONS
    #endif
    
    /*
     * Translate between device numbers and major/disk unit/disk partition.
     */
    #define DISKUNIT(dev)   (minor(dev) / MAXPARTITIONS)
    #define DISKPART(dev)   (minor(dev) % MAXPARTITIONS)
    #define MAKEDISKDEV(maj, unit, part) \
        (makedev((maj), ((unit) * MAXPARTITIONS) + (part)))
    
   #define DISKMAGIC       ((u_int32_t)0x82564557) /* The disk magic number */
   
   #ifndef LOCORE
   struct disklabel {
           u_int32_t d_magic;              /* the magic number */
           u_int16_t d_type;               /* drive type */
           u_int16_t 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.
            */
           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
   
                           /* disk geometry: */
           u_int32_t d_secsize;            /* # of bytes per sector */
           u_int32_t d_nsectors;           /* # of data sectors per track */
           u_int32_t d_ntracks;            /* # of tracks per cylinder */
           u_int32_t d_ncylinders;         /* # of data cylinders per unit */
           u_int32_t d_secpercyl;          /* # of data sectors per cylinder */
           u_int32_t 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_int16_t d_sparespertrack;     /* # of spare sectors per track */
           u_int16_t d_sparespercyl;       /* # of spare sectors per cylinder */
           /*
            * Alternate cylinders include maintenance, replacement, configuration
            * description areas, etc.
            */
           u_int32_t 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_int16_t d_rpm;                /* rotational speed */
           u_int16_t d_interleave;         /* hardware sector interleave */
           u_int16_t d_trackskew;          /* sector 0 skew, per track */
           u_int16_t d_cylskew;            /* sector 0 skew, per cylinder */
           u_int32_t d_headswitch;         /* head switch time, usec */
           u_int32_t d_trkseek;            /* track-to-track seek, usec */
           u_int32_t d_flags;              /* generic flags */
   #define NDDATA 5
           u_int32_t d_drivedata[NDDATA];  /* drive-type specific information */
   #define NSPARE 5
           u_int32_t d_spare[NSPARE];      /* reserved for future use */
           u_int32_t d_magic2;             /* the magic number (again) */
           u_int16_t d_checksum;           /* xor of data incl. partitions */
   
                           /* filesystem and partition information: */
           u_int16_t d_npartitions;        /* number of partitions in following */
           u_int32_t d_bbsize;             /* size of boot area at sn0, bytes */
           u_int32_t d_sbsize;             /* max size of fs superblock, bytes */
           struct  partition {             /* the partition table */
                   u_int32_t p_size;       /* number of sectors in partition */
                   u_int32_t p_offset;     /* starting sector */
                   u_int32_t p_fsize;      /* filesystem basic fragment size */
                   u_int8_t p_fstype;      /* filesystem type, see below */
                   u_int8_t p_frag;        /* filesystem fragments per block */
                   union {
                           u_int16_t cpg;  /* UFS: FS cylinders per group */
                           u_int16_t 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",
           NULL
   };
   #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 */
   #define FS_ADOS         14              /* AmigaDOS fast file system */
   #define FS_HFS          15              /* Macintosh HFS */
   
   #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",
           "ADOS",
           "HFS",
           NULL
   };
   #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
   
   #endif /* __APPLE_API_OBSOLETE */
   
   #endif /* ! _SYS_DISKLABEL_H_ */
   

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