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selftests/tc-testing: Add netem test case exercising loops

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Add a netem nested duplicate test case to validate that it won't
cause an infinite loop

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Victor Nogueira <victor@mojatatu.com>
Link: https://patch.msgid.link/20260525122556.973584-10-jhs@mojatatu.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Victor Nogueira 2026-05-25 08:25:56 -04:00 committed by Paolo Abeni
parent d38dc56a02
commit 0f6e00aa5f
1 changed files with 32 additions and 1 deletions
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33
tools/testing/selftests/tc-testing/tc-tests/qdiscs/netem.json
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@ -336,5 +336,36 @@
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
}
},
{
"id": "8c17",
"name": "Test netem's recursive duplicate",
"category": [
"qdisc",
"netem"
],
"plugins": {
"requires": "nsPlugin"
},
"setup": [
"$IP link set dev $DUMMY up || true",
"$IP addr add 10.10.11.10/24 dev $DUMMY || true",
"$TC qdisc add dev $DUMMY root handle 1: netem limit 1000 duplicate 100%",
"$TC qdisc add dev $DUMMY parent 1: handle 2: netem limit 1000 duplicate 100%"
],
"cmdUnderTest": "ping -c 1 10.10.11.11 -W 0.01",
"expExitCode": "1",
"verifyCmd": "$TC -s -j qdisc ls dev $DUMMY root",
"matchJSON": [
{
"kind": "netem",
"handle": "1:",
"bytes": 294,
"packets": 3
}
],
"teardown": [
"$TC qdisc del dev $DUMMY handle 1: root"
]
}
]