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