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Wed, 26 Nov 2025 11:53:03 -0800 (PST) Received: from pop-os.scu.edu ([129.210.115.107]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-11c93db4a23sm101508235c88.2.2025.11.26.11.53.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Nov 2025 11:53:02 -0800 (PST) From: Cong Wang To: netdev@vger.kernel.org Cc: stephen@networkplumber.org, kuba@kernel.org, Cong Wang , William Liu Subject: [Patch net v5 6/9] selftests/tc-testing: Add a nested netem duplicate test Date: Wed, 26 Nov 2025 11:52:41 -0800 Message-Id: <20251126195244.88124-7-xiyou.wangcong@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251126195244.88124-1-xiyou.wangcong@gmail.com> References: <20251126195244.88124-1-xiyou.wangcong@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Integrate the reproducer from William into tc-testing and use scapy to generate packets for testing: # ./tdc.py -e 1676 -- ns/SubPlugin.__init__ -- scapy/SubPlugin.__init__ Test 1676: NETEM nested duplicate 100% [ 1154.071135] v0p0id1676: entered promiscuous mode [ 1154.101066] virtio_net virtio0 enp1s0: entered promiscuous mode [ 1154.146301] virtio_net virtio0 enp1s0: left promiscuous mode . Sent 1 packets. [ 1154.173695] v0p0id1676: left promiscuous mode [ 1154.216159] v0p0id1676: entered promiscuous mode . Sent 1 packets. [ 1154.238398] v0p0id1676: left promiscuous mode [ 1154.260909] v0p0id1676: entered promiscuous mode . Sent 1 packets. [ 1154.282708] v0p0id1676: left promiscuous mode [ 1154.309399] v0p0id1676: entered promiscuous mode . Sent 1 packets. [ 1154.337949] v0p0id1676: left promiscuous mode [ 1154.360924] v0p0id1676: entered promiscuous mode . Sent 1 packets. [ 1154.383522] v0p0id1676: left promiscuous mode All test results: 1..1 ok 1 1676 - NETEM nested duplicate 100% Reported-by: William Liu Signed-off-by: Cong Wang --- .../tc-testing/tc-tests/qdiscs/netem.json | 25 +++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/tools/testing/selftests/tc-testing/tc-tests/qdiscs/netem.json b/tools/testing/selftests/tc-testing/tc-tests/qdiscs/netem.json index 3c4444961488..03c4ceb22990 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/qdiscs/netem.json +++ b/tools/testing/selftests/tc-testing/tc-tests/qdiscs/netem.json @@ -336,5 +336,30 @@ "teardown": [ "$TC qdisc del dev $DUMMY handle 1: root" ] + }, + { + "id": "1676", + "name": "NETEM nested duplicate 100%", + "category": ["qdisc", "netem"], + "setup": [ + "$TC qdisc add dev $DEV1 root handle 1: netem limit 1000 duplicate 100%", + "$TC qdisc add dev $DEV1 parent 1: handle 2: netem limit 1000 duplicate 100%" + ], + "teardown": [ + "$TC qdisc del dev $DEV1 root" + ], + "plugins": { + "requires": ["nsPlugin", "scapyPlugin"] + }, + "scapy": { + "iface": "$DEV0", + "count": 5, + "packet": "Ether()/IP(dst='10.10.10.1', src='10.10.10.10')/TCP(sport=12345, dport=80)" + }, + "cmdUnderTest": "$TC -s qdisc show dev $DEV1", + "expExitCode": "0", + "verifyCmd": "$TC -s qdisc show dev $DEV1", + "matchPattern": "Sent [0-9]+ bytes [0-9]+ pkt", + "matchCount": "2" } ] -- 2.34.1