104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
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* This is the original minix inode layout on disk.
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* Note the 8-bit gid and atime and ctime.
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*/
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struct minix1_inode {
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uint16_t i_mode;
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uint16_t i_uid;
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uint32_t i_size;
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uint32_t i_time;
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uint8_t i_gid;
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uint8_t i_nlinks;
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uint16_t i_zone[9];
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};
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/*
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* The new minix inode has all the time entries, as well as
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* long block numbers and a third indirect block (7+1+1+1
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* instead of 7+1+1). Also, some previously 8-bit values are
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* now 16-bit. The inode is now 64 bytes instead of 32.
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*/
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struct minix2_inode {
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uint16_t i_mode;
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uint16_t i_nlinks;
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uint16_t i_uid;
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uint16_t i_gid;
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uint32_t i_size;
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uint32_t i_atime;
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uint32_t i_mtime;
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uint32_t i_ctime;
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uint32_t i_zone[10];
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};
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/*
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* minix superblock data on disk
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*/
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struct minix_superblock {
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uint16_t s_ninodes;
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uint16_t s_nzones;
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uint16_t s_imap_blocks;
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uint16_t s_zmap_blocks;
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uint16_t s_firstdatazone;
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uint16_t s_log_zone_size;
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uint32_t s_max_size;
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uint16_t s_magic;
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uint16_t s_state;
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uint32_t s_zones;
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};
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struct minix_dir_entry {
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uint16_t inode;
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char name[];
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};
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/* Believe it or not, but mount.h has this one #defined */
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#undef BLOCK_SIZE
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enum {
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BLOCK_SIZE = 1024,
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BITS_PER_BLOCK = BLOCK_SIZE << 3,
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MINIX_ROOT_INO = 1,
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MINIX_BAD_INO = 2,
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#undef MINIX1_SUPER_MAGIC
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MINIX1_SUPER_MAGIC = 0x137F, /* original minix fs */
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#undef MINIX1_SUPER_MAGIC2
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MINIX1_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */
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/* bionic has this define */
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#undef MINIX2_SUPER_MAGIC
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MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */
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#undef MINIX2_SUPER_MAGIC2
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MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */
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MINIX_VALID_FS = 0x0001, /* clean fs */
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MINIX_ERROR_FS = 0x0002, /* fs has errors */
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INODE_SIZE1 = sizeof(struct minix1_inode),
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INODE_SIZE2 = sizeof(struct minix2_inode),
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MINIX1_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix1_inode),
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MINIX2_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix2_inode),
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};
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/*
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Basic test script for regressions in mkfs/fsck.
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Copies current dir into image (typically bbox build tree).
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#!/bin/sh
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tmpdir=/tmp/minixtest-$$
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tmpimg=/tmp/minix-img-$$
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mkdir $tmpdir
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dd if=/dev/zero of=$tmpimg bs=1M count=20 || exit
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./busybox mkfs.minix $tmpimg || exit
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mount -o loop $tmpimg $tmpdir || exit
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cp -a "$PWD" $tmpdir
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umount $tmpdir || exit
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./busybox fsck.minix -vfm $tmpimg || exit
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echo "Continue?"
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read junk
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./busybox fsck.minix -vfml $tmpimg || exit
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rmdir $tmpdir
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rm $tmpimg
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*/
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