include/pt-bsd.h

   1 /*
   2  * No copyright is claimed.  This code is in the public domain; do with
   3  * it what you wish.
   4  */
   5 #ifndef UTIL_LINUX_PT_BSD_H
   6 #define UTIL_LINUX_PT_BSD_H
   7
   8 #define BSD_MAXPARTITIONS       16
   9 #define BSD_FS_UNUSED           0
  10
  11 #ifndef BSD_DISKMAGIC
  12 # define BSD_DISKMAGIC     ((uint32_t) 0x82564557)
  13 #endif
  14
  15 #define BSD_LINUX_BOOTDIR "/usr/ucb/mdec"
  16
  17 #if defined (__alpha__) || defined (__powerpc__) || \
  18     defined (__ia64__) || defined (__hppa__)
  19 # define BSD_LABELSECTOR   0
  20 # define BSD_LABELOFFSET   64
  21 #else
  22 # define BSD_LABELSECTOR   1
  23 # define BSD_LABELOFFSET   0
  24 #endif
  25
  26 #define BSD_BBSIZE        8192          /* size of boot area, with label */
  27 #define BSD_SBSIZE        8192          /* max size of fs superblock */
  28
  29 struct bsd_disklabel {
  30         uint32_t        d_magic;                /* the magic number */
  31         int16_t         d_type;                 /* drive type */
  32         int16_t         d_subtype;              /* controller/d_type specific */
  33         char            d_typename[16];         /* type name, e.g. "eagle" */
  34         char            d_packname[16];         /* pack identifier */
  35
  36                         /* disk geometry: */
  37         uint32_t        d_secsize;              /* # of bytes per sector */
  38         uint32_t        d_nsectors;             /* # of data sectors per track */
  39         uint32_t        d_ntracks;              /* # of tracks per cylinder */
  40         uint32_t        d_ncylinders;           /* # of data cylinders per unit */
  41         uint32_t        d_secpercyl;            /* # of data sectors per cylinder */
  42         uint32_t        d_secperunit;           /* # of data sectors per unit */
  43
  44         /*
  45          * Spares (bad sector replacements) below
  46          * are not counted in d_nsectors or d_secpercyl.
  47          * Spare sectors are assumed to be physical sectors
  48          * which occupy space at the end of each track and/or cylinder.
  49          */
  50         uint16_t        d_sparespertrack;       /* # of spare sectors per track */
  51         uint16_t        d_sparespercyl;         /* # of spare sectors per cylinder */
  52
  53         /*
  54          * Alternate cylinders include maintenance, replacement,
  55          * configuration description areas, etc.
  56          */
  57         uint32_t        d_acylinders;           /* # of alt. cylinders per unit */
  58
  59                         /* hardware characteristics: */
  60         /*
  61          * d_interleave, d_trackskew and d_cylskew describe perturbations
  62          * in the media format used to compensate for a slow controller.
  63          * Interleave is physical sector interleave, set up by the formatter
  64          * or controller when formatting.  When interleaving is in use,
  65          * logically adjacent sectors are not physically contiguous,
  66          * but instead are separated by some number of sectors.
  67          * It is specified as the ratio of physical sectors traversed
  68          * per logical sector.  Thus an interleave of 1:1 implies contiguous
  69          * layout, while 2:1 implies that logical sector 0 is separated
  70          * by one sector from logical sector 1.
  71          * d_trackskew is the offset of sector 0 on track N
  72          * relative to sector 0 on track N-1 on the same cylinder.
  73          * Finally, d_cylskew is the offset of sector 0 on cylinder N
  74          * relative to sector 0 on cylinder N-1.
  75          */
  76         uint16_t        d_rpm;                  /* rotational speed */
  77         uint16_t        d_interleave;           /* hardware sector interleave */
  78         uint16_t        d_trackskew;            /* sector 0 skew, per track */
  79         uint16_t        d_cylskew;              /* sector 0 skew, per cylinder */
  80         uint32_t        d_headswitch;           /* head switch time, usec */
  81         uint32_t        d_trkseek;              /* track-to-track seek, usec */
  82         uint32_t        d_flags;                /* generic flags */
  83         uint32_t        d_drivedata[5];         /* drive-type specific information */
  84         uint32_t        d_spare[5];             /* reserved for future use */
  85         uint32_t        d_magic2;               /* the magic number (again) */
  86         uint16_t        d_checksum;             /* xor of data incl. partitions */
  87
  88                         /* filesystem and partition information: */
  89         uint16_t        d_npartitions;          /* number of partitions in following */
  90         uint32_t        d_bbsize;               /* size of boot area at sn0, bytes */
  91         uint32_t        d_sbsize;               /* max size of fs superblock, bytes */
  92
  93         struct bsd_partition     {              /* the partition table */
  94                 uint32_t        p_size;         /* number of sectors in partition */
  95                 uint32_t        p_offset;       /* starting sector */
  96                 uint32_t        p_fsize;        /* filesystem basic fragment size */
  97                 uint8_t         p_fstype;       /* filesystem type, see below */
  98                 uint8_t         p_frag;         /* filesystem fragments per block */
  99                 uint16_t        p_cpg;          /* filesystem cylinders per group */
 100         } __attribute__((packed)) d_partitions[BSD_MAXPARTITIONS];      /* actually may be more */
 101 } __attribute__((packed));
 102
 103
 104 /* d_type values: */
 105 #define BSD_DTYPE_SMD           1               /* SMD, XSMD; VAX hp/up */
 106 #define BSD_DTYPE_MSCP          2               /* MSCP */
 107 #define BSD_DTYPE_DEC           3               /* other DEC (rk, rl) */
 108 #define BSD_DTYPE_SCSI          4               /* SCSI */
 109 #define BSD_DTYPE_ESDI          5               /* ESDI interface */
 110 #define BSD_DTYPE_ST506         6               /* ST506 etc. */
 111 #define BSD_DTYPE_HPIB          7               /* CS/80 on HP-IB */
 112 #define BSD_DTYPE_HPFL          8               /* HP Fiber-link */
 113 #define BSD_DTYPE_FLOPPY        10              /* floppy */
 114
 115 /* d_subtype values: */
 116 #define BSD_DSTYPE_INDOSPART    0x8             /* is inside dos partition */
 117 #define BSD_DSTYPE_DOSPART(s)   ((s) & 3)       /* dos partition number */
 118 #define BSD_DSTYPE_GEOMETRY     0x10            /* drive params in label */
 119
 120 /*
 121  * Filesystem type and version.
 122  * Used to interpret other filesystem-specific
 123  * per-partition information.
 124  */
 125 #define BSD_FS_UNUSED   0               /* unused */
 126 #define BSD_FS_SWAP     1               /* swap */
 127 #define BSD_FS_V6       2               /* Sixth Edition */
 128 #define BSD_FS_V7       3               /* Seventh Edition */
 129 #define BSD_FS_SYSV     4               /* System V */
 130 #define BSD_FS_V71K     5               /* V7 with 1K blocks (4.1, 2.9) */
 131 #define BSD_FS_V8       6               /* Eighth Edition, 4K blocks */
 132 #define BSD_FS_BSDFFS   7               /* 4.2BSD fast file system */
 133 #define BSD_FS_BSDLFS   9               /* 4.4BSD log-structured file system */
 134 #define BSD_FS_OTHER    10              /* in use, but unknown/unsupported */
 135 #define BSD_FS_HPFS     11              /* OS/2 high-performance file system */
 136 #define BSD_FS_ISO9660  12              /* ISO-9660 filesystem (cdrom) */
 137 #define BSD_FS_ISOFS    BSD_FS_ISO9660
 138 #define BSD_FS_BOOT     13              /* partition contains bootstrap */
 139 #define BSD_FS_ADOS     14              /* AmigaDOS fast file system */
 140 #define BSD_FS_HFS      15              /* Macintosh HFS */
 141 #define BSD_FS_ADVFS    16              /* Digital Unix AdvFS */
 142
 143 /* this is annoying, but it's also the way it is :-( */
 144 #ifdef __alpha__
 145 #define BSD_FS_EXT2     8               /* ext2 file system */
 146 #else
 147 #define BSD_FS_MSDOS    8               /* MS-DOS file system */
 148 #endif
 149
 150 /*
 151  * flags shared by various drives:
 152  */
 153 #define BSD_D_REMOVABLE 0x01            /* removable media */
 154 #define BSD_D_ECC       0x02            /* supports ECC */
 155 #define BSD_D_BADSECT   0x04            /* supports bad sector forw. */
 156 #define BSD_D_RAMDISK   0x08            /* disk emulator */
 157 #define BSD_D_CHAIN     0x10            /* can do back-back transfers */
 158 #define BSD_D_DOSPART   0x20            /* within MSDOS partition */
 159
 160 #endif /* UTIL_LINUX_PT_BSD_H */