| 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 superblock data on disk
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| 35 | */
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| 36 | struct minix_superblock {
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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[];
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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 | #undef MINIX1_SUPER_MAGIC
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| 65 | MINIX1_SUPER_MAGIC = 0x137F, /* original minix fs */
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| 66 | #undef MINIX1_SUPER_MAGIC2
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| 67 | MINIX1_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */
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| 68 | /* bionic has this define */
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| 69 | #undef MINIX2_SUPER_MAGIC
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| 70 | MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */
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| 71 | #undef MINIX2_SUPER_MAGIC2
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| 72 | MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */
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| 73 | MINIX_VALID_FS = 0x0001, /* clean fs */
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| 74 | MINIX_ERROR_FS = 0x0002, /* fs has errors */
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| 75 |
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| 76 | INODE_SIZE1 = sizeof(struct minix1_inode),
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| 77 | INODE_SIZE2 = sizeof(struct minix2_inode),
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| 78 | MINIX1_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix1_inode),
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| 79 | MINIX2_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix2_inode),
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| 80 | };
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| 81 |
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| 82 | /*
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| 83 | Basic test script for regressions in mkfs/fsck.
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| 84 | Copies current dir into image (typically bbox build tree).
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| 85 |
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| 86 | #!/bin/sh
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| 87 | tmpdir=/tmp/minixtest-$$
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| 88 | tmpimg=/tmp/minix-img-$$
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| 89 |
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| 90 | mkdir $tmpdir
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| 91 | dd if=/dev/zero of=$tmpimg bs=1M count=20 || exit
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| 92 | ./busybox mkfs.minix $tmpimg || exit
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| 93 | mount -o loop $tmpimg $tmpdir || exit
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| 94 | cp -a "$PWD" $tmpdir
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| 95 | umount $tmpdir || exit
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| 96 | ./busybox fsck.minix -vfm $tmpimg || exit
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| 97 | echo "Continue?"
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| 98 | read junk
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| 99 | ./busybox fsck.minix -vfml $tmpimg || exit
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| 100 | rmdir $tmpdir
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| 101 | rm $tmpimg
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| 102 |
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| 103 | */
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