include/linux/minix_fs.h

   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  */
  34 struct 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  */
  50 struct 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  */
  65 struct 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  */
  81 struct 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
  97 struct minix_dir_entry {
  98         __u16 inode;
  99         char name[0];
 100 };
 101
 102 struct minix3_dir_entry {
 103         __u32 inode;
 104         char name[0];
 105 };
 106 #endif