netdev - [PATCH net v3 4/4] selftests: tc-testing: add test for qfq with stab overhead

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Date: Tue, 11 Jul 2023 18:01:03 -0300
From: Pedro Tammela <pctammela@...atatu.com>
To: netdev@...r.kernel.org
Cc: jhs@...atatu.com,
	xiyou.wangcong@...il.com,
	jiri@...nulli.us,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	shuah@...nel.org,
	shaozhengchao@...wei.com,
	victor@...atatu.com,
	simon.horman@...igine.com,
	paolo.valente@...more.it,
	Pedro Tammela <pctammela@...atatu.com>
Subject: [PATCH net v3 4/4] selftests: tc-testing: add test for qfq with stab overhead

A packet with stab overhead greater than QFQ_MAX_LMAX should be dropped
by the QFQ qdisc as it can't handle such lengths.

Signed-off-by: Jamal Hadi Salim <jhs@...atatu.com>
Signed-off-by: Pedro Tammela <pctammela@...atatu.com>
---
 .../tc-testing/tc-tests/qdiscs/qfq.json       | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tools/testing/selftests/tc-testing/tc-tests/qdiscs/qfq.json b/tools/testing/selftests/tc-testing/tc-tests/qdiscs/qfq.json
index 965da7622dac..976dffda4654 100644
--- a/tools/testing/selftests/tc-testing/tc-tests/qdiscs/qfq.json
+++ b/tools/testing/selftests/tc-testing/tc-tests/qdiscs/qfq.json
@@ -261,5 +261,43 @@
         "teardown": [
             "$IP link del dev $DUMMY type dummy"
         ]
+    },
+    {
+        "id": "5993",
+        "name": "QFQ with stab overhead greater than max packet len",
+        "category": [
+            "qdisc",
+            "qfq",
+            "scapy"
+        ],
+        "plugins": {
+            "requires": [
+                "nsPlugin",
+                "scapyPlugin"
+            ]
+        },
+        "setup": [
+            "$IP link add dev $DUMMY type dummy || /bin/true",
+            "$IP link set dev $DUMMY up || /bin/true",
+            "$TC qdisc add dev $DUMMY handle 1: stab mtu 2048 tsize 512 mpu 0 overhead 999999999 linklayer ethernet root qfq",
+            "$TC class add dev $DUMMY parent 1: classid 1:1 qfq weight 100",
+            "$TC qdisc add dev $DEV1 clsact",
+            "$TC filter add dev $DEV1 ingress protocol ip flower dst_ip 1.3.3.7/32 action mirred egress mirror dev $DUMMY"
+        ],
+        "cmdUnderTest": "$TC filter add dev $DUMMY parent 1: matchall classid 1:1",
+        "scapy": [
+            {
+                "iface": "$DEV0",
+                "count": 22,
+                "packet": "Ether(type=0x800)/IP(src='10.0.0.10',dst='1.3.3.7')/TCP(sport=5000,dport=10)"
+            }
+        ],
+        "expExitCode": "0",
+        "verifyCmd": "$TC -s qdisc ls dev $DUMMY",
+        "matchPattern": "dropped 22",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DUMMY handle 1: root qfq"
+        ]
     }
 ]
-- 
2.39.2