ext2fs_htree_node
((struct ext2fs_htree_node *)bp->b_data)->h_entries;
entp = ((struct ext2fs_htree_node *)bp->b_data)->h_entries;
struct ext2fs_htree_node *dst_node;
dst_node = (struct ext2fs_htree_node *)newidxblock;
dst_node = (struct ext2fs_htree_node *)dst_bp->b_data;