CK_DIR
if (fsflags & CK_DIR)
fsflags &= ~(CK_SUPERBLOCK | CK_CYLGRP | CK_INODE | CK_INDIR | CK_DIR);
if ((sblock.fs_metackhash & CK_DIR) == 0 &&
ckhashadd |= CK_DIR;
sblock.fs_metackhash |= CK_DIR;