rem: if(dir->stream.type != STREAM_TYPE_DIR)
add: if (dir->stream.type != S_IFDIR)
context: bootfs_insert_in_dir(struct bootfs_vnode *dir, struct bootfs_vnode *v){	if(dir->stream.type != STREAM_TYPE_DIR)		return EINVAL;	v->dir_next = dir->stream.u.dir.dir_head;	dir->stream.u.dir.dir_head = v;	v->parent = dir;	return 0;}