Commit 5cba412d authored by Victor Nogueira's avatar Victor Nogueira Committed by Paolo Abeni
Browse files

selftests/tc-testing: Test case exercising potential mirred redirect deadlock 



Add a test case that reproduces deadlock scenario where the user has
a drr qdisc attached to root and has a mirred action that redirects to
self on egress

Signed-off-by: default avatarVictor Nogueira <victor@mojatatu.com>
Acked-by: default avatarJamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/20251210162255.1057663-2-jhs@mojatatu.com


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 1d856251

tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json

+46 −0
Original line number Diff line number Diff line
@@ -1052,5 +1052,51 @@ 
            "$TC qdisc del dev $DEV1 ingress_block 21 clsact",

            "$TC actions flush action mirred"

        ]

    },

    {

        "id": "7eba",

        "name": "Redirect multiport: dummy egress ->  dummy egress (Loop)",

        "category": [

            "filter",

            "mirred"

        ],

        "plugins": {

            "requires": [

                "nsPlugin"

            ]

        },

        "setup": [

            "$IP link set dev $DUMMY up || true",

            "$IP addr add 10.10.10.10/24 dev $DUMMY || true",

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

            "$TC filter add dev $DUMMY parent 1: protocol ip prio 10 matchall action mirred egress redirect dev $DUMMY index 1"

        ],

        "cmdUnderTest": "ping -c1 -W0.01 -I $DUMMY 10.10.10.1",

        "expExitCode": "1",

        "verifyCmd": "$TC -j -s actions get action mirred index 1",

        "matchJSON": [

            {

                "total acts": 0

            },

            {

                "actions": [

                    {

                        "order": 1,

                        "kind": "mirred",

                        "mirred_action": "redirect",

                        "direction": "egress",

                        "index": 1,

                        "stats": {

                            "packets": 1,

                            "overlimits": 1

                        },

                        "not_in_hw": true

                    }

                ]

            }

        ],

        "teardown": [

            "$TC qdisc del dev $DUMMY root"

        ]

    }

]