Commit ca34aceb authored by Alexandre Ferrieux's avatar Alexandre Ferrieux Committed by Paolo Abeni
Browse files

net: sched: u32: Add test case for systematic hnode IDR leaks 



Add a tdc test case to exercise the just-fixed systematic leak of
IDR entries in u32 hnode disposal. Given the IDR in question is
confined to the range [1..0x7FF], it is sufficient to create/delete
the same filter 2048 times to fill it up and get a nonzero exit
status from "tc filter add".

Signed-off-by: default avatarAlexandre Ferrieux <alexandre.ferrieux@orange.com>
Acked-by: default avatarJamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: default avatarVictor Nogueira <victor@mojatatu.com>
Link: https://patch.msgid.link/20241113100428.360460-1-alexandre.ferrieux@orange.com


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent f8d670b1

tools/testing/selftests/tc-testing/tc-tests/filters/u32.json

+24 −0
Original line number Diff line number Diff line
@@ -329,5 +329,29 @@ 
        "teardown": [

            "$TC qdisc del dev $DEV1 parent root drr"

        ]

    },

    {

        "id": "1234",

        "name": "Exercise IDR leaks by creating/deleting a filter many (2048) times",

        "category": [

            "filter",

            "u32"

        ],

        "plugins": {

            "requires": "nsPlugin"

        },

        "setup": [

            "$TC qdisc add dev $DEV1 parent root handle 10: drr",

            "$TC filter add dev $DEV1 parent 10:0 protocol ip prio 2 u32 match ip src 0.0.0.2/32 action drop",

            "$TC filter add dev $DEV1 parent 10:0 protocol ip prio 3 u32 match ip src 0.0.0.3/32 action drop"

        ],

        "cmdUnderTest": "bash -c 'for i in {1..2048} ;do echo filter delete dev $DEV1 pref 3;echo filter add dev $DEV1 parent 10:0 protocol ip prio 3 u32 match ip src 0.0.0.3/32 action drop;done | $TC -b -'",

        "expExitCode": "0",

        "verifyCmd": "$TC filter show dev $DEV1",

        "matchPattern": "protocol ip pref 3 u32",

        "matchCount": "3",

        "teardown": [

            "$TC qdisc del dev $DEV1 parent root drr"

        ]

    }

]