diff options
Diffstat (limited to 'util-linux/minix.h')
| -rw-r--r-- | util-linux/minix.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/util-linux/minix.h b/util-linux/minix.h new file mode 100644 index 0000000..3e2b989 --- /dev/null +++ b/util-linux/minix.h @@ -0,0 +1,98 @@ +/* + * 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 + +*/ |