include/linux/efs_vh.h

   1 /*
   2  * efs_vh.h
   3  *
   4  * Copyright (c) 1999 Al Smith
   5  *
   6  * Portions derived from IRIX header files (c) 1985 MIPS Computer Systems, Inc.
   7  */
   8
   9 #ifndef __EFS_VH_H__
  10 #define __EFS_VH_H__
  11
  12 #define VHMAGIC         0xbe5a941       /* volume header magic number */
  13 #define NPARTAB         16              /* 16 unix partitions */
  14 #define NVDIR           15              /* max of 15 directory entries */
  15 #define BFNAMESIZE      16              /* max 16 chars in boot file name */
  16 #define VDNAMESIZE      8
  17
  18 struct volume_directory {
  19         char    vd_name[VDNAMESIZE];    /* name */
  20         int     vd_lbn;                 /* logical block number */
  21         int     vd_nbytes;              /* file length in bytes */
  22 };
  23
  24 struct partition_table {        /* one per logical partition */
  25         int     pt_nblks;       /* # of logical blks in partition */
  26         int     pt_firstlbn;    /* first lbn of partition */
  27         int     pt_type;        /* use of partition */
  28 };
  29
  30 struct volume_header {
  31         int     vh_magic;                       /* identifies volume header */
  32         short   vh_rootpt;                      /* root partition number */
  33         short   vh_swappt;                      /* swap partition number */
  34         char    vh_bootfile[BFNAMESIZE];        /* name of file to boot */
  35         char    pad[48];                        /* device param space */
  36         struct volume_directory vh_vd[NVDIR];   /* other vol hdr contents */
  37         struct partition_table  vh_pt[NPARTAB]; /* device partition layout */
  38         int     vh_csum;                        /* volume header checksum */
  39         int     vh_fill;                        /* fill out to 512 bytes */
  40 };
  41
  42 /* partition type sysv is used for EFS format CD-ROM partitions */
  43 #define SGI_SYSV        0x05
  44 #define SGI_EFS         0x07
  45 #define IS_EFS(x)       (((x) == SGI_EFS) || ((x) == SGI_SYSV))
  46
  47 struct pt_types {
  48         int     pt_type;
  49         char    *pt_name;
  50 } sgi_pt_types[] = {
  51         {0x00,          "SGI vh"},
  52         {0x01,          "SGI trkrepl"},
  53         {0x02,          "SGI secrepl"},
  54         {0x03,          "SGI raw"},
  55         {0x04,          "SGI bsd"},
  56         {SGI_SYSV,      "SGI sysv"},
  57         {0x06,          "SGI vol"},
  58         {SGI_EFS,       "SGI efs"},
  59         {0x08,          "SGI lv"},
  60         {0x09,          "SGI rlv"},
  61         {0x0A,          "SGI xfs"},
  62         {0x0B,          "SGI xfslog"},
  63         {0x0C,          "SGI xlv"},
  64         {0x82,          "Linux swap"},
  65         {0x83,          "Linux native"},
  66         {0,             NULL}
  67 };
  68
  69 #endif /* __EFS_VH_H__ */
  70