fdisk/fdiskbsdlabel.h

   1 /*
   2  * Copyright (c) 1987, 1988 Regents of the University of California.
   3  * 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
  34 #include <linux/types.h>        /* for __u32 etc */
  35
  36 #ifndef BSD_DISKMAGIC   /* perhaps from <linux/genhd.h> */
  37 #define BSD_DISKMAGIC     ((__u32) 0x82564557)
  38 #endif
  39
  40 #ifndef BSD_MAXPARTITIONS
  41 #define BSD_MAXPARTITIONS 8
  42 #endif
  43
  44 #define BSD_LINUX_BOOTDIR "/usr/ucb/mdec"
  45
  46 #if defined (i386) || defined (sparc)
  47 #define BSD_LABELSECTOR   1
  48 #define BSD_LABELOFFSET   0
  49 #elif defined (__alpha__) || defined (__powerpc__)
  50 #define BSD_LABELSECTOR   0
  51 #define BSD_LABELOFFSET   64
  52 #else
  53 #error unknown architecture
  54 #endif
  55
  56 #define BSD_BBSIZE        8192          /* size of boot area, with label */
  57 #define BSD_SBSIZE        8192          /* max size of fs superblock */
  58
  59 struct xbsd_disklabel {
  60         __u32   d_magic;                /* the magic number */
  61         __s16   d_type;                 /* drive type */
  62         __s16   d_subtype;              /* controller/d_type specific */
  63         char    d_typename[16];         /* type name, e.g. "eagle" */
  64         char    d_packname[16];                 /* pack identifier */
  65                         /* disk geometry: */
  66         __u32   d_secsize;              /* # of bytes per sector */
  67         __u32   d_nsectors;             /* # of data sectors per track */
  68         __u32   d_ntracks;              /* # of tracks per cylinder */
  69         __u32   d_ncylinders;           /* # of data cylinders per unit */
  70         __u32   d_secpercyl;            /* # of data sectors per cylinder */
  71         __u32   d_secperunit;           /* # of data sectors per unit */
  72         /*
  73          * Spares (bad sector replacements) below
  74          * are not counted in d_nsectors or d_secpercyl.
  75          * Spare sectors are assumed to be physical sectors
  76          * which occupy space at the end of each track and/or cylinder.
  77          */
  78         __u16   d_sparespertrack;       /* # of spare sectors per track */
  79         __u16   d_sparespercyl;         /* # of spare sectors per cylinder */
  80         /*
  81          * Alternate cylinders include maintenance, replacement,
  82          * configuration description areas, etc.
  83          */
  84         __u32   d_acylinders;           /* # of alt. cylinders per unit */
  85
  86                         /* hardware characteristics: */
  87         /*
  88          * d_interleave, d_trackskew and d_cylskew describe perturbations
  89          * in the media format used to compensate for a slow controller.
  90          * Interleave is physical sector interleave, set up by the formatter
  91          * or controller when formatting.  When interleaving is in use,
  92          * logically adjacent sectors are not physically contiguous,
  93          * but instead are separated by some number of sectors.
  94          * It is specified as the ratio of physical sectors traversed
  95          * per logical sector.  Thus an interleave of 1:1 implies contiguous
  96          * layout, while 2:1 implies that logical sector 0 is separated
  97          * by one sector from logical sector 1.
  98          * d_trackskew is the offset of sector 0 on track N
  99          * relative to sector 0 on track N-1 on the same cylinder.
 100          * Finally, d_cylskew is the offset of sector 0 on cylinder N
 101          * relative to sector 0 on cylinder N-1.
 102          */
 103         __u16   d_rpm;                  /* rotational speed */
 104         __u16   d_interleave;           /* hardware sector interleave */
 105         __u16   d_trackskew;            /* sector 0 skew, per track */
 106         __u16   d_cylskew;              /* sector 0 skew, per cylinder */
 107         __u32   d_headswitch;           /* head switch time, usec */
 108         __u32   d_trkseek;              /* track-to-track seek, usec */
 109         __u32   d_flags;                /* generic flags */
 110 #define NDDATA 5
 111         __u32   d_drivedata[NDDATA];    /* drive-type specific information */
 112 #define NSPARE 5
 113         __u32   d_spare[NSPARE];        /* reserved for future use */
 114         __u32   d_magic2;               /* the magic number (again) */
 115         __u16   d_checksum;             /* xor of data incl. partitions */
 116                         /* filesystem and partition information: */
 117         __u16   d_npartitions;          /* number of partitions in following */
 118         __u32   d_bbsize;               /* size of boot area at sn0, bytes */
 119         __u32   d_sbsize;               /* max size of fs superblock, bytes */
 120         struct xbsd_partition    {      /* the partition table */
 121                 __u32   p_size;         /* number of sectors in partition */
 122                 __u32   p_offset;       /* starting sector */
 123                 __u32   p_fsize;        /* filesystem basic fragment size */
 124                 __u8    p_fstype;       /* filesystem type, see below */
 125                 __u8    p_frag;         /* filesystem fragments per block */
 126                 __u16   p_cpg;          /* filesystem cylinders per group */
 127         } d_partitions[BSD_MAXPARTITIONS]; /* actually may be more */
 128 };
 129
 130 /* d_type values: */
 131 #define BSD_DTYPE_SMD           1               /* SMD, XSMD; VAX hp/up */
 132 #define BSD_DTYPE_MSCP          2               /* MSCP */
 133 #define BSD_DTYPE_DEC           3               /* other DEC (rk, rl) */
 134 #define BSD_DTYPE_SCSI          4               /* SCSI */
 135 #define BSD_DTYPE_ESDI          5               /* ESDI interface */
 136 #define BSD_DTYPE_ST506         6               /* ST506 etc. */
 137 #define BSD_DTYPE_HPIB          7               /* CS/80 on HP-IB */
 138 #define BSD_DTYPE_HPFL          8               /* HP Fiber-link */
 139 #define BSD_DTYPE_FLOPPY        10              /* floppy */
 140
 141 /* d_subtype values: */
 142 #define BSD_DSTYPE_INDOSPART    0x8             /* is inside dos partition */
 143 #define BSD_DSTYPE_DOSPART(s)   ((s) & 3)       /* dos partition number */
 144 #define BSD_DSTYPE_GEOMETRY     0x10            /* drive params in label */
 145
 146 #ifdef DKTYPENAMES
 147 static char *xbsd_dktypenames[] = {
 148         "unknown",
 149         "SMD",
 150         "MSCP",
 151         "old DEC",
 152         "SCSI",
 153         "ESDI",
 154         "ST506",
 155         "HP-IB",
 156         "HP-FL",
 157         "type 9",
 158         "floppy",
 159         0
 160 };
 161 #define BSD_DKMAXTYPES  (sizeof(xbsd_dktypenames) / sizeof(xbsd_dktypenames[0]) - 1)
 162 #endif
 163
 164 /*
 165  * Filesystem type and version.
 166  * Used to interpret other filesystem-specific
 167  * per-partition information.
 168  */
 169 #define BSD_FS_UNUSED   0               /* unused */
 170 #define BSD_FS_SWAP     1               /* swap */
 171 #define BSD_FS_V6       2               /* Sixth Edition */
 172 #define BSD_FS_V7       3               /* Seventh Edition */
 173 #define BSD_FS_SYSV     4               /* System V */
 174 #define BSD_FS_V71K     5               /* V7 with 1K blocks (4.1, 2.9) */
 175 #define BSD_FS_V8       6               /* Eighth Edition, 4K blocks */
 176 #define BSD_FS_BSDFFS   7               /* 4.2BSD fast file system */
 177 #define BSD_FS_BSDLFS   9               /* 4.4BSD log-structured file system */
 178 #define BSD_FS_OTHER    10              /* in use, but unknown/unsupported */
 179 #define BSD_FS_HPFS     11              /* OS/2 high-performance file system */
 180 #define BSD_FS_ISO9660  12              /* ISO-9660 filesystem (cdrom) */
 181 #define BSD_FS_ISOFS    BSD_FS_ISO9660
 182 #define BSD_FS_BOOT     13              /* partition contains bootstrap */
 183 #define BSD_FS_ADOS     14              /* AmigaDOS fast file system */
 184 #define BSD_FS_HFS      15              /* Macintosh HFS */
 185
 186 /* this is annoying, but it's also the way it is :-( */
 187 #ifdef __alpha__
 188 #define BSD_FS_EXT2     8               /* MS-DOS file system */
 189 #else
 190 #define BSD_FS_MSDOS    8               /* MS-DOS file system */
 191 #endif
 192
 193 #ifdef  DKTYPENAMES
 194 static struct systypes xbsd_fstypes[] = {
 195         {BSD_FS_UNUSED, "unused"},
 196         {BSD_FS_SWAP,   "swap"},
 197         {BSD_FS_V6,     "Version 6"},
 198         {BSD_FS_V7,     "Version 7"},
 199         {BSD_FS_SYSV,   "System V"},
 200         {BSD_FS_V71K,   "4.1BSD"},
 201         {BSD_FS_V8,     "Eighth Edition"},
 202         {BSD_FS_BSDFFS, "4.2BSD"},
 203 #ifdef __alpha__
 204         {BSD_FS_EXT2,   "ext2"},
 205 #else
 206         {BSD_FS_MSDOS,  "MS-DOS"},
 207 #endif
 208         {BSD_FS_BSDLFS, "4.4LFS"},
 209         {BSD_FS_OTHER,  "unknown"},
 210         {BSD_FS_HPFS,   "HPFS"},
 211         {BSD_FS_ISO9660,"ISO-9660"},
 212         {BSD_FS_BOOT,   "boot"},
 213         {BSD_FS_ADOS,   "ADOS"},
 214         {BSD_FS_HFS,    "HFS"},
 215         { 0, NULL }
 216 };
 217 #define BSD_FSMAXTYPES (SIZE(xbsd_fstypes)-1)
 218
 219 #endif
 220
 221 /*
 222  * flags shared by various drives:
 223  */
 224 #define BSD_D_REMOVABLE 0x01            /* removable media */
 225 #define BSD_D_ECC       0x02            /* supports ECC */
 226 #define BSD_D_BADSECT   0x04            /* supports bad sector forw. */
 227 #define BSD_D_RAMDISK   0x08            /* disk emulator */
 228 #define BSD_D_CHAIN     0x10            /* can do back-back transfers */
 229 #define BSD_D_DOSPART   0x20            /* within MSDOS partition */