def METHOD_NAME(lvm_list):
    """
    Create snap chain
    :params lvm_list: lvm list
    """
    snap_path = file_snap_path
    if disk_type == "block" or disk_type == "rbd_with_auth":
        test_obj.tmp_dir = "/dev/%s/%s" % (vg_name, lv_name)
        snap_path = lvm_list[0]
    test_obj.prepare_snapshot(snap_num=snap_nums, snap_path=snap_path,
                              option=snap_option, extra=extra_option,
                              clean_snap_file=False)
    test_obj.snap_path_list = test_obj.lvm_list