Commit 108f9405 authored by Xiang Mei's avatar Xiang Mei Committed by Paolo Abeni
Browse files

selftests/tc-testing: Test CAKE scheduler when enqueue drops packets 



Add tests that trigger packet drops in cake_enqueue(): "CAKE with QFQ
Parent - CAKE enqueue with packets dropping". It forces CAKE_enqueue to
return NET_XMIT_CN after dropping the packets when it has a QFQ parent.

Signed-off-by: default avatarXiang Mei <xmei5@asu.edu>
Reviewed-by: default avatarToke Høiland-Jørgensen <toke@toke.dk>
Link: https://patch.msgid.link/20251128001415.377823-3-xmei5@asu.edu


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 9fefc78f

tools/testing/selftests/tc-testing/tc-tests/infra/qdiscs.json

+28 −0
Original line number Diff line number Diff line
@@ -1005,5 +1005,33 @@ 
        "teardown": [

            "$TC qdisc del dev $DUMMY clsact"

        ]

    },

    {

        "id": "4366",

        "name": "CAKE with QFQ Parent - CAKE enqueue with packets dropping",

        "category": [

            "qdisc",

            "cake",

            "netem"

        ],

        "plugins": {

            "requires": "nsPlugin"

        },

        "setup":[

            "$TC qdisc add dev $DUMMY handle 1: root qfq",

            "$TC class add dev $DUMMY parent 1: classid 1:1 qfq maxpkt 1024",

            "$TC qdisc add dev $DUMMY parent 1:1 handle 2: cake memlimit 9",

            "$TC filter add dev $DUMMY protocol ip parent 1: prio 1 u32 match ip protocol 1 0xff flowid 1:1",

            "ping -I$DUMMY -f -c1 -s64 -W1 10.10.10.1 || true",

            "$TC qdisc replace dev $DUMMY parent 1:1 handle 3: netem delay 0ms"

        ],

        "cmdUnderTest": "ping -I$DUMMY -f -c1 -s64 -W1 10.10.10.1 || true",

        "expExitCode": "0",

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

        "matchPattern": "qdisc qfq 1:",

        "matchCount": "1",

        "teardown": [

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

        ]

    }

]