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Message-Id: <20251124200825.241037-2-jhs@mojatatu.com>
Date: Mon, 24 Nov 2025 15:08:25 -0500
From: Jamal Hadi Salim <jhs@...atatu.com>
To: davem@...emloft.net,
kuba@...nel.org,
edumazet@...gle.com,
pabeni@...hat.com
Cc: jiri@...nulli.us,
xiyou.wangcong@...il.com,
netdev@...r.kernel.org,
dcaratti@...hat.com,
Victor Nogueira <victor@...atatu.com>,
Jamal Hadi Salim <jhs@...atatu.com>
Subject: [PATCH net-next 2/2] selftests/tc-testing: Add test cases exercising mirred redirects (with loops)
From: Victor Nogueira <victor@...atatu.com>
Add two tdc test cases for mirred which cause loops.
The first one does a redirect dev1 ingress -> dummy egress -> dev1 ingress
The second one does a redirect dummy egress -> dev1 ingress -> dummy egress
Signed-off-by: Victor Nogueira <victor@...atatu.com>
Signed-off-by: Jamal Hadi Salim <jhs@...atatu.com>
---
.../tc-testing/tc-tests/actions/mirred.json | 103 ++++++++++++++++++
1 file changed, 103 insertions(+)
diff --git a/tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json b/tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json
index b73bd255ea36..97800f2e26f2 100644
--- a/tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json
+++ b/tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json
@@ -1052,5 +1052,108 @@
"$TC qdisc del dev $DEV1 ingress_block 21 clsact",
"$TC actions flush action mirred"
]
+ },
+ {
+ "id": "6941",
+ "name": "Redirect multiport: dev1 ingress -> dummy egress -> dev1 ingress (Loop)",
+ "category": [
+ "filter",
+ "mirred"
+ ],
+ "plugins": {
+ "requires": [
+ "nsPlugin",
+ "scapyPlugin"
+ ]
+ },
+ "scapy": {
+ "iface": "$DEV0",
+ "count": 1,
+ "packet": "Ether()/IP(dst='10.10.10.1', src='10.10.10.10')/ICMP()"
+ },
+ "setup": [
+ "$IP link set dev $DUMMY up || true",
+ "$TC qdisc add dev $DEV1 clsact",
+ "$TC filter add dev $DEV1 ingress protocol ip prio 10 matchall action mirred egress redirect dev $DUMMY index 1",
+ "$IP addr add 10.10.10.10/24 dev $DUMMY || true",
+ "$TC qdisc add dev $DUMMY clsact",
+ "$TC filter add dev $DUMMY egress protocol ip prio 10 matchall action mirred ingress redirect dev $DEV1 index 2"
+ ],
+ "cmdUnderTest": "$TC -j -s actions get action mirred index 1",
+ "expExitCode": "0",
+ "verifyCmd": "$TC -j -s actions get action mirred index 1",
+ "matchJSON": [
+ {
+ "total acts": 0
+ },
+ {
+ "actions": [
+ {
+ "order": 1,
+ "kind": "mirred",
+ "mirred_action": "redirect",
+ "direction": "egress",
+ "index": 1,
+ "stats": {
+ "packets": 1
+ },
+ "not_in_hw": true
+ }
+ ]
+ }
+ ],
+ "teardown": [
+ "$TC qdisc del dev $DEV1 clsact",
+ "$TC qdisc del dev $DUMMY clsact"
+ ]
+ },
+ {
+ "id": "ceb4",
+ "name": "Redirect multiport: dummy egress -> dev1 ingress -> dummy egress (Loop)",
+ "category": [
+ "filter",
+ "mirred"
+ ],
+ "plugins": {
+ "requires": [
+ "nsPlugin"
+ ]
+ },
+ "setup": [
+ "$IP link set dev $DUMMY up || true",
+ "$IP addr add 10.10.10.10/24 dev $DUMMY || true",
+ "$TC qdisc add dev $DUMMY clsact",
+ "$TC filter add dev $DUMMY egress protocol ip prio 10 matchall action mirred ingress redirect dev $DEV1 index 1",
+ "$TC qdisc add dev $DEV1 clsact",
+ "$TC filter add dev $DEV1 ingress protocol ip prio 10 matchall action mirred egress redirect dev $DUMMY index 2"
+ ],
+ "cmdUnderTest": "ping -c1 -W0.01 -I $DUMMY 10.10.10.1",
+ "expExitCode": "1",
+ "verifyCmd": "$TC -j -s actions get action mirred index 1",
+ "matchJSON": [
+ {
+ "total acts": 0
+ },
+ {
+ "actions": [
+ {
+ "order": 1,
+ "kind": "mirred",
+ "mirred_action": "redirect",
+ "direction": "ingress",
+ "index": 1,
+ "stats": {
+ "packets": 2,
+ "overlimits": 1
+ },
+ "not_in_hw": true
+ }
+ ]
+ }
+ ],
+ "teardown": [
+ "$TC qdisc del dev $DUMMY clsact",
+ "$TC qdisc del dev $DEV1 clsact"
+ ]
}
]
--
2.34.1
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