include/linux/minix_fs.h

   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  */
  33 struct 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  */
  49 struct 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  */
  64 struct 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  */
  80 struct 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
  96 struct minix_dir_entry {
  97         __u16 inode;
  98         char name[0];
  99 };
 100
 101 struct minix3_dir_entry {
 102         __u32 inode;
 103         char name[0];
 104 };
 105 #endif