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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
#
# Script that checks that SFQ rejects a limit of 1 at the kernel
# level. We can't use iproute2's tc because it does not accept a limit
# of 1.
import sys
import os
from pyroute2 import IPRoute
from pyroute2.netlink.exceptions import NetlinkError
ip = IPRoute()
ifidx = ip.link_lookup(ifname=sys.argv[1])
try:
ip.tc('add', 'sfq', ifidx, limit=1)
sys.exit(1)
except NetlinkError:
sys.exit(0)
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