LXR linux/include/linux/minix

   1#ifndef _LINUX_MINIX_FS_H
   2#define _LINUX_MINIX_FS_H
   3
   4#include <linux/magic.h>
   5
   6/*
   7 * The minix filesystem constants/structures
   8 */
   9
  10/*
  11 * Thanks to Kees J Bot for sending me the definitions of the new
  12 * minix filesystem (aka V2) with bigger inodes and 32-bit block
  13 * pointers.
  14 */
  15
  16#define MINIX_ROOT_INO 1
  17
  18/* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */
  19#define MINIX_LINK_MAX  250
  20#define MINIX2_LINK_MAX 65530
  21
  22#define MINIX_I_MAP_SLOTS       8
  23#define MINIX_Z_MAP_SLOTS       64
  24#define MINIX_VALID_FS          0x0001          /* Clean fs. */
  25#define MINIX_ERROR_FS          0x0002          /* fs has errors. */
  26
  27#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
  28
  29/*
  30 * This is the original minix inode layout on disk.
  31 * Note the 8-bit gid and atime and ctime.
  32 */
  33struct minix_inode {
  34        __u16 i_mode;
  35        __u16 i_uid;
  36        __u32 i_size;
  37        __u32 i_time;
  38        __u8  i_gid;
  39        __u8  i_nlinks;
  40        __u16 i_zone[9];
  41};
  42
  43/*
  44 * The new minix inode has all the time entries, as well as
  45 * long block numbers and a third indirect block (7+1+1+1
  46 * instead of 7+1+1). Also, some previously 8-bit values are
  47 * now 16-bit. The inode is now 64 bytes instead of 32.
  48 */
  49struct minix2_inode {
  50        __u16 i_mode;
  51        __u16 i_nlinks;
  52        __u16 i_uid;
  53        __u16 i_gid;
  54        __u32 i_size;
  55        __u32 i_atime;
  56        __u32 i_mtime;
  57        __u32 i_ctime;
  58        __u32 i_zone[10];
  59};
  60
  61/*
  62 * minix super-block data on disk
  63 */
  64struct minix_super_block {
  65        __u16 s_ninodes;
  66        __u16 s_nzones;
  67        __u16 s_imap_blocks;
  68        __u16 s_zmap_blocks;
  69        __u16 s_firstdatazone;
  70        __u16 s_log_zone_size;
  71        __u32 s_max_size;
  72        __u16 s_magic;
  73        __u16 s_state;
  74        __u32 s_zones;
  75};
  76
  77/*
  78 * V3 minix super-block data on disk
  79 */
  80struct minix3_super_block {
  81        __u32 s_ninodes;
  82        __u16 s_pad0;
  83        __u16 s_imap_blocks;
  84        __u16 s_zmap_blocks;
  85        __u16 s_firstdatazone;
  86        __u16 s_log_zone_size;
  87        __u16 s_pad1;
  88        __u32 s_max_size;
  89        __u32 s_zones;
  90        __u16 s_magic;
  91        __u16 s_pad2;
  92        __u16 s_blocksize;
  93        __u8  s_disk_version;
  94};
  95
  96struct minix_dir_entry {
  97        __u16 inode;
  98        char name[0];
  99};
 100
 101struct minix3_dir_entry {
 102        __u32 inode;
 103        char name[0];
 104};
 105#endif
 106