Contents of /tags/mkinitrd-6_1_4/busybox/util-linux/minix.h
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Wed Aug 5 16:25:39 2009 UTC (15 years, 1 month ago) by niro
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Wed Aug 5 16:25:39 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 2410 byte(s)
tagged 'mkinitrd-6_1_4'
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 superblock data on disk |
35 | */ |
36 | struct minix_superblock { |
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 | |
77 | /* |
78 | Basic test script for regressions in mkfs/fsck. |
79 | Copies current dir into image (typically bbox build tree). |
80 | |
81 | #!/bin/sh |
82 | tmpdir=/tmp/minixtest-$$ |
83 | tmpimg=/tmp/minix-img-$$ |
84 | |
85 | mkdir $tmpdir |
86 | dd if=/dev/zero of=$tmpimg bs=1M count=20 || exit |
87 | ./busybox mkfs.minix $tmpimg || exit |
88 | mount -o loop $tmpimg $tmpdir || exit |
89 | cp -a "$PWD" $tmpdir |
90 | umount $tmpdir || exit |
91 | ./busybox fsck.minix -vfm $tmpimg || exit |
92 | echo "Continue?" |
93 | read junk |
94 | ./busybox fsck.minix -vfml $tmpimg || exit |
95 | rmdir $tmpdir |
96 | rm $tmpimg |
97 | |
98 | */ |