linux/include/linux/minix_fs.h
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   1#ifndef _LINUX_MINIX_FS_H
   2#define _LINUX_MINIX_FS_H
   3
   4#include <linux/types.h>
   5#include <linux/magic.h>
   6
   7/*
   8 * The minix filesystem constants/structures
   9 */
  10
  11/*
  12 * Thanks to Kees J Bot for sending me the definitions of the new
  13 * minix filesystem (aka V2) with bigger inodes and 32-bit block
  14 * pointers.
  15 */
  16
  17#define MINIX_ROOT_INO 1
  18
  19/* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */
  20#define MINIX_LINK_MAX  250
  21#define MINIX2_LINK_MAX 65530
  22
  23#define MINIX_I_MAP_SLOTS       8
  24#define MINIX_Z_MAP_SLOTS       64
  25#define MINIX_VALID_FS          0x0001          /* Clean fs. */
  26#define MINIX_ERROR_FS          0x0002          /* fs has errors. */
  27
  28#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
  29
  30/*
  31 * This is the original minix inode layout on disk.
  32 * Note the 8-bit gid and atime and ctime.
  33 */
  34struct minix_inode {
  35        __u16 i_mode;
  36        __u16 i_uid;
  37        __u32 i_size;
  38        __u32 i_time;
  39        __u8  i_gid;
  40        __u8  i_nlinks;
  41        __u16 i_zone[9];
  42};
  43
  44/*
  45 * The new minix inode has all the time entries, as well as
  46 * long block numbers and a third indirect block (7+1+1+1
  47 * instead of 7+1+1). Also, some previously 8-bit values are
  48 * now 16-bit. The inode is now 64 bytes instead of 32.
  49 */
  50struct minix2_inode {
  51        __u16 i_mode;
  52        __u16 i_nlinks;
  53        __u16 i_uid;
  54        __u16 i_gid;
  55        __u32 i_size;
  56        __u32 i_atime;
  57        __u32 i_mtime;
  58        __u32 i_ctime;
  59        __u32 i_zone[10];
  60};
  61
  62/*
  63 * minix super-block data on disk
  64 */
  65struct minix_super_block {
  66        __u16 s_ninodes;
  67        __u16 s_nzones;
  68        __u16 s_imap_blocks;
  69        __u16 s_zmap_blocks;
  70        __u16 s_firstdatazone;
  71        __u16 s_log_zone_size;
  72        __u32 s_max_size;
  73        __u16 s_magic;
  74        __u16 s_state;
  75        __u32 s_zones;
  76};
  77
  78/*
  79 * V3 minix super-block data on disk
  80 */
  81struct minix3_super_block {
  82        __u32 s_ninodes;
  83        __u16 s_pad0;
  84        __u16 s_imap_blocks;
  85        __u16 s_zmap_blocks;
  86        __u16 s_firstdatazone;
  87        __u16 s_log_zone_size;
  88        __u16 s_pad1;
  89        __u32 s_max_size;
  90        __u32 s_zones;
  91        __u16 s_magic;
  92        __u16 s_pad2;
  93        __u16 s_blocksize;
  94        __u8  s_disk_version;
  95};
  96
  97struct minix_dir_entry {
  98        __u16 inode;
  99        char name[0];
 100};
 101
 102struct minix3_dir_entry {
 103        __u32 inode;
 104        char name[0];
 105};
 106#endif
 107
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