minix_fs.h 2.0 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105
  1. #ifndef _LINUX_MINIX_FS_H
  2. #define _LINUX_MINIX_FS_H
  3. #include <linux/magic.h>
  4. /*
  5. * The minix filesystem constants/structures
  6. */
  7. /*
  8. * Thanks to Kees J Bot for sending me the definitions of the new
  9. * minix filesystem (aka V2) with bigger inodes and 32-bit block
  10. * pointers.
  11. */
  12. #define MINIX_ROOT_INO 1
  13. /* Not the same as the bogus LINK_MAX in <linux/limits.h>. Oh well. */
  14. #define MINIX_LINK_MAX 250
  15. #define MINIX2_LINK_MAX 65530
  16. #define MINIX_I_MAP_SLOTS 8
  17. #define MINIX_Z_MAP_SLOTS 64
  18. #define MINIX_VALID_FS 0x0001 /* Clean fs. */
  19. #define MINIX_ERROR_FS 0x0002 /* fs has errors. */
  20. #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
  21. /*
  22. * This is the original minix inode layout on disk.
  23. * Note the 8-bit gid and atime and ctime.
  24. */
  25. struct minix_inode {
  26. __u16 i_mode;
  27. __u16 i_uid;
  28. __u32 i_size;
  29. __u32 i_time;
  30. __u8 i_gid;
  31. __u8 i_nlinks;
  32. __u16 i_zone[9];
  33. };
  34. /*
  35. * The new minix inode has all the time entries, as well as
  36. * long block numbers and a third indirect block (7+1+1+1
  37. * instead of 7+1+1). Also, some previously 8-bit values are
  38. * now 16-bit. The inode is now 64 bytes instead of 32.
  39. */
  40. struct minix2_inode {
  41. __u16 i_mode;
  42. __u16 i_nlinks;
  43. __u16 i_uid;
  44. __u16 i_gid;
  45. __u32 i_size;
  46. __u32 i_atime;
  47. __u32 i_mtime;
  48. __u32 i_ctime;
  49. __u32 i_zone[10];
  50. };
  51. /*
  52. * minix super-block data on disk
  53. */
  54. struct minix_super_block {
  55. __u16 s_ninodes;
  56. __u16 s_nzones;
  57. __u16 s_imap_blocks;
  58. __u16 s_zmap_blocks;
  59. __u16 s_firstdatazone;
  60. __u16 s_log_zone_size;
  61. __u32 s_max_size;
  62. __u16 s_magic;
  63. __u16 s_state;
  64. __u32 s_zones;
  65. };
  66. /*
  67. * V3 minix super-block data on disk
  68. */
  69. struct minix3_super_block {
  70. __u32 s_ninodes;
  71. __u16 s_pad0;
  72. __u16 s_imap_blocks;
  73. __u16 s_zmap_blocks;
  74. __u16 s_firstdatazone;
  75. __u16 s_log_zone_size;
  76. __u16 s_pad1;
  77. __u32 s_max_size;
  78. __u32 s_zones;
  79. __u16 s_magic;
  80. __u16 s_pad2;
  81. __u16 s_blocksize;
  82. __u8 s_disk_version;
  83. };
  84. struct minix_dir_entry {
  85. __u16 inode;
  86. char name[0];
  87. };
  88. struct minix3_dir_entry {
  89. __u32 inode;
  90. char name[0];
  91. };
  92. #endif