selftests/tc-testing: sfq: test that kernel rejects limit of 1

#!/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)

        "teardown": [

            "$TC qdisc del dev $DUMMY handle 1: root"

        ]

    },

    {

        "id": "4d6f",

        "name": "Check that limit of 1 is rejected",

        "category": [

            "qdisc",

            "sfq"

        ],

        "plugins": {

            "requires": "nsPlugin"

        },

        "setup": [

        ],

        "cmdUnderTest": "./scripts/sfq_rejects_limit_1.py $DUMMY",

        "expExitCode": "0",

        "verifyCmd": "$TC qdisc show dev $DUMMY",

        "matchPattern": "sfq",

        "matchCount": "0",

        "teardown": [

        ]

    }

]