rem: bootfs_open_dir(fs_cookie _fs, fs_vnode _v, file_cookie *_cookie)
add: bootfs_open_dir(fs_volume _fs, fs_vnode _v, fs_cookie *_cookie)
context: bootfs_open_dir(fs_cookie _fs, fs_vnode _v, file_cookie *_cookie){	struct bootfs *fs = _fs;	struct bootfs_vnode *vnode = _v;	struct bootfs_cookie *cookie;	status_t status = 0;	TRACE(("bootfs_open_dir: vnode %p\n", vnode));	if (vnode->stream.type != STREAM_TYPE_DIR)		return EINVAL;	cookie = kmalloc(sizeof(struct bootfs_cookie));	if (cookie == NULL)		return ENOMEM;	mutex_lock(&fs->lock);	cookie->s = &vnode->stream;	cookie->u.dir.ptr = vnode->stream.u.dir.dir_head;	*_cookie = cookie;	mutex_unlock(&fs->lock);	return status;}