netdev - [PATCH net v2 2/2] selftests: net/forwarding: test purge of active DWRR classes

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Message-ID: <489497cb781af7389011ca1591fb702a7391f5e7.1755016081.git.dcaratti@redhat.com>
Date: Tue, 12 Aug 2025 18:40:30 +0200
From: Davide Caratti <dcaratti@...hat.com>
To: Jamal Hadi Salim <jhs@...atatu.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Jiri Pirko <jiri@...nulli.us>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Lion Ackermann <nnamrec@...il.com>,
	Petr Machata <petrm@...dia.com>,
	netdev@...r.kernel.org,
	Ivan Vecera <ivecera@...hat.com>,
	Li Shuang <shuali@...hat.com>
Cc: stable@...r.kernel.org
Subject: [PATCH net v2 2/2] selftests: net/forwarding: test purge of active DWRR classes

Extend sch_ets.sh to add a reproducer for problematic list deletions when
active DWRR class are purged by ets_qdisc_change() [1] [2].

[1] https://lore.kernel.org/netdev/e08c7f4a6882f260011909a868311c6e9b54f3e4.1639153474.git.dcaratti@redhat.com/
[2] https://lore.kernel.org/netdev/f3b9bacc73145f265c19ab80785933da5b7cbdec.1754581577.git.dcaratti@redhat.com/

Suggested-by: Victor Nogueira <victor@...atatu.com>
Signed-off-by: Davide Caratti <dcaratti@...hat.com>
---
 tools/testing/selftests/net/forwarding/sch_ets.sh       | 1 +
 tools/testing/selftests/net/forwarding/sch_ets_tests.sh | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/sch_ets.sh b/tools/testing/selftests/net/forwarding/sch_ets.sh
index 1f6f53e284b5..6269d5e23487 100755
--- a/tools/testing/selftests/net/forwarding/sch_ets.sh
+++ b/tools/testing/selftests/net/forwarding/sch_ets.sh
@@ -11,6 +11,7 @@ ALL_TESTS="
 	ets_test_strict
 	ets_test_mixed
 	ets_test_dwrr
+	ets_test_plug
 	classifier_mode
 	ets_test_strict
 	ets_test_mixed
diff --git a/tools/testing/selftests/net/forwarding/sch_ets_tests.sh b/tools/testing/selftests/net/forwarding/sch_ets_tests.sh
index 08240d3e3c87..79d837a2868a 100644
--- a/tools/testing/selftests/net/forwarding/sch_ets_tests.sh
+++ b/tools/testing/selftests/net/forwarding/sch_ets_tests.sh
@@ -224,3 +224,11 @@ ets_test_dwrr()
 	ets_set_dwrr_two_bands
 	xfail_on_slow ets_dwrr_test_01
 }
+
+ets_test_plug()
+{
+	ets_change_qdisc $put 2 "3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3" "1514 1514"
+	tc qdisc add dev $put handle 20: parent 10:4 plug
+	start_traffic_pktsize 100 $h1.10 192.0.2.1 192.0.2.2 00:c1:a0:c1:a0:00 "-c 1"
+	ets_qdisc_setup $put 2
+}
-- 
2.47.0