| Denis Vlasenko | 87033fb | 2007-01-03 00:47:47 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * This is the original minix inode layout on disk. |
| 3 | * Note the 8-bit gid and atime and ctime. |
| 4 | */ |
| 5 | struct minix1_inode { |
| 6 | uint16_t i_mode; |
| 7 | uint16_t i_uid; |
| 8 | uint32_t i_size; |
| 9 | uint32_t i_time; |
| 10 | uint8_t i_gid; |
| 11 | uint8_t i_nlinks; |
| 12 | uint16_t i_zone[9]; |
| 13 | }; |
| 14 | |
| 15 | /* |
| 16 | * The new minix inode has all the time entries, as well as |
| 17 | * long block numbers and a third indirect block (7+1+1+1 |
| 18 | * instead of 7+1+1). Also, some previously 8-bit values are |
| 19 | * now 16-bit. The inode is now 64 bytes instead of 32. |
| 20 | */ |
| 21 | struct minix2_inode { |
| 22 | uint16_t i_mode; |
| 23 | uint16_t i_nlinks; |
| 24 | uint16_t i_uid; |
| 25 | uint16_t i_gid; |
| 26 | uint32_t i_size; |
| 27 | uint32_t i_atime; |
| 28 | uint32_t i_mtime; |
| 29 | uint32_t i_ctime; |
| 30 | uint32_t i_zone[10]; |
| 31 | }; |
| 32 | |
| 33 | /* |
| 34 | * minix super-block data on disk |
| 35 | */ |
| 36 | struct minix_super_block { |
| 37 | uint16_t s_ninodes; |
| 38 | uint16_t s_nzones; |
| 39 | uint16_t s_imap_blocks; |
| 40 | uint16_t s_zmap_blocks; |
| 41 | uint16_t s_firstdatazone; |
| 42 | uint16_t s_log_zone_size; |
| 43 | uint32_t s_max_size; |
| 44 | uint16_t s_magic; |
| 45 | uint16_t s_state; |
| 46 | uint32_t s_zones; |
| 47 | }; |
| 48 | |
| 49 | struct minix_dir_entry { |
| 50 | uint16_t inode; |
| 51 | char name[0]; |
| 52 | }; |
| 53 | |
| 54 | /* Believe it or not, but mount.h has this one #defined */ |
| 55 | #undef BLOCK_SIZE |
| 56 | |
| 57 | enum { |
| 58 | BLOCK_SIZE = 1024, |
| 59 | BITS_PER_BLOCK = BLOCK_SIZE << 3, |
| 60 | |
| 61 | MINIX_ROOT_INO = 1, |
| 62 | MINIX_BAD_INO = 2, |
| 63 | |
| 64 | MINIX1_SUPER_MAGIC = 0x137F, /* original minix fs */ |
| 65 | MINIX1_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */ |
| 66 | MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */ |
| 67 | MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */ |
| 68 | MINIX_VALID_FS = 0x0001, /* clean fs */ |
| 69 | MINIX_ERROR_FS = 0x0002, /* fs has errors */ |
| 70 | |
| 71 | INODE_SIZE1 = sizeof(struct minix1_inode), |
| 72 | INODE_SIZE2 = sizeof(struct minix2_inode), |
| 73 | MINIX1_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix1_inode), |
| 74 | MINIX2_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix2_inode), |
| 75 | }; |
| 76 | |