1 | /*
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2 | * This is the original minix inode layout on disk.
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3 | * Note the 8-bit gid and atime and ctime.
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4 | */
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5 | struct minix1_inode {
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6 | uint16_t i_mode;
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7 | uint16_t i_uid;
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8 | uint32_t i_size;
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9 | uint32_t i_time;
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10 | uint8_t i_gid;
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11 | uint8_t i_nlinks;
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12 | uint16_t i_zone[9];
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13 | };
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14 |
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15 | /*
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16 | * The new minix inode has all the time entries, as well as
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17 | * long block numbers and a third indirect block (7+1+1+1
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18 | * instead of 7+1+1). Also, some previously 8-bit values are
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19 | * now 16-bit. The inode is now 64 bytes instead of 32.
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20 | */
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21 | struct minix2_inode {
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22 | uint16_t i_mode;
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23 | uint16_t i_nlinks;
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24 | uint16_t i_uid;
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25 | uint16_t i_gid;
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26 | uint32_t i_size;
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27 | uint32_t i_atime;
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28 | uint32_t i_mtime;
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29 | uint32_t i_ctime;
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30 | uint32_t i_zone[10];
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31 | };
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32 |
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33 | /*
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34 | * minix super-block data on disk
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35 | */
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36 | struct minix_super_block {
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37 | uint16_t s_ninodes;
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38 | uint16_t s_nzones;
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39 | uint16_t s_imap_blocks;
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40 | uint16_t s_zmap_blocks;
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41 | uint16_t s_firstdatazone;
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42 | uint16_t s_log_zone_size;
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43 | uint32_t s_max_size;
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44 | uint16_t s_magic;
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45 | uint16_t s_state;
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46 | uint32_t s_zones;
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47 | };
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48 |
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49 | struct minix_dir_entry {
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50 | uint16_t inode;
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51 | char name[0];
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52 | };
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53 |
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54 | /* Believe it or not, but mount.h has this one #defined */
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55 | #undef BLOCK_SIZE
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56 |
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57 | enum {
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58 | BLOCK_SIZE = 1024,
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59 | BITS_PER_BLOCK = BLOCK_SIZE << 3,
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60 |
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61 | MINIX_ROOT_INO = 1,
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62 | MINIX_BAD_INO = 2,
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63 |
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64 | MINIX1_SUPER_MAGIC = 0x137F, /* original minix fs */
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65 | MINIX1_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */
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66 | MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */
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67 | MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */
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68 | MINIX_VALID_FS = 0x0001, /* clean fs */
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69 | MINIX_ERROR_FS = 0x0002, /* fs has errors */
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70 |
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71 | INODE_SIZE1 = sizeof(struct minix1_inode),
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72 | INODE_SIZE2 = sizeof(struct minix2_inode),
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73 | MINIX1_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix1_inode),
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74 | MINIX2_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix2_inode),
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75 | };
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76 |
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77 | /*
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78 | Basic test script for regressions in mkfs/fsck.
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79 | Copies current dir into image (typically bbox build tree).
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80 |
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81 | #!/bin/sh
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82 | tmpdir=/tmp/minixtest-$$
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83 | tmpimg=/tmp/minix-img-$$
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84 |
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85 | mkdir $tmpdir
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86 | dd if=/dev/zero of=$tmpimg bs=1M count=20 || exit
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87 | ./busybox mkfs.minix $tmpimg || exit
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88 | mount -o loop $tmpimg $tmpdir || exit
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89 | cp -a "$PWD" $tmpdir
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90 | umount $tmpdir || exit
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91 | ./busybox fsck.minix -vfm $tmpimg || exit
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92 | echo "Continue?"
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93 | read junk
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94 | ./busybox fsck.minix -vfml $tmpimg || exit
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95 | rmdir $tmpdir
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96 | rm $tmpimg
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97 |
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98 | */
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