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

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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: Alexandre Ferrieux <alexandre.ferrieux@orange.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Victor Nogueira <victor@mojatatu.com>
Link: https://patch.msgid.link/20241113100428.360460-1-alexandre.ferrieux@orange.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Alexandre Ferrieux 2024-11-13 11:04:28 +01:00 committed by Paolo Abeni
parent f8d670b1ae
commit ca34aceb32
1 changed files with 24 additions and 0 deletions
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24
tools/testing/selftests/tc-testing/tc-tests/filters/u32.json
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@ -329,5 +329,29 @@
"teardown": [ "teardown": [
"$TC qdisc del dev $DEV1 parent root drr" "$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"
]
} }
] ]