selftests/tc-testing: add selftests for gred qdisc

Test 8942: Create GRED with default setting
Test 5783: Create GRED with grio setting
Test 8a09: Create GRED with limit setting
Test 48cb: Create GRED with ecn setting
Test 763a: Change GRED setting
Test 8309: Show GRED class
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/tc-testing/config

@@ -17,6 +17,7 @@ CONFIG_NET_SCH_CHOKE=m
 CONFIG_NET_SCH_CODEL=m
 CONFIG_NET_SCH_ETF=m
 CONFIG_NET_SCH_FQ=m
+CONFIG_NET_SCH_GRED=m
 CONFIG_NET_SCH_PRIO=m
 CONFIG_NET_SCH_INGRESS=m
 

tools/testing/selftests/tc-testing/tc-tests/qdiscs/gred.json

+[
+    {
+        "id": "8942",
+        "name": "Create GRED with default setting",
+        "category": [
+            "qdisc",
+            "gred"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$IP link add dev $DUMMY type dummy || /bin/true"
+        ],
+        "cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root gred setup vqs 10 default 1",
+        "expExitCode": "0",
+        "verifyCmd": "$TC qdisc show dev $DUMMY",
+        "matchPattern": "qdisc gred 1: root refcnt [0-9]+ vqs 10 default 1",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DUMMY handle 1: root",
+            "$IP link del dev $DUMMY type dummy"
+        ]
+    },
+    {
+        "id": "5783",
+        "name": "Create GRED with grio setting",
+        "category": [
+            "qdisc",
+            "gred"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$IP link add dev $DUMMY type dummy || /bin/true"
+        ],
+        "cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root gred setup vqs 10 default 1 grio",
+        "expExitCode": "0",
+        "verifyCmd": "$TC qdisc show dev $DUMMY",
+        "matchPattern": "qdisc gred 1: root refcnt [0-9]+ vqs 10 default 1.*grio",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DUMMY handle 1: root",
+            "$IP link del dev $DUMMY type dummy"
+        ]
+    },
+    {
+        "id": "8a09",
+        "name": "Create GRED with limit setting",
+        "category": [
+            "qdisc",
+            "gred"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$IP link add dev $DUMMY type dummy || /bin/true"
+        ],
+        "cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root gred setup vqs 10 default 1 limit 1000",
+        "expExitCode": "0",
+        "verifyCmd": "$TC qdisc show dev $DUMMY",
+        "matchPattern": "qdisc gred 1: root refcnt [0-9]+ vqs 10 default 1 limit 1000b",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DUMMY handle 1: root",
+            "$IP link del dev $DUMMY type dummy"
+        ]
+    },
+    {
+        "id": "48ca",
+        "name": "Create GRED with ecn setting",
+        "category": [
+            "qdisc",
+            "gred"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$IP link add dev $DUMMY type dummy || /bin/true"
+        ],
+        "cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root gred setup vqs 10 default 2 ecn",
+        "expExitCode": "0",
+        "verifyCmd": "$TC qdisc show dev $DUMMY",
+        "matchPattern": "qdisc gred 1: root refcnt [0-9]+ vqs 10 default 2.*ecn",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DUMMY handle 1: root",
+            "$IP link del dev $DUMMY type dummy"
+        ]
+    },
+    {
+        "id": "48cb",
+        "name": "Create GRED with harddrop setting",
+        "category": [
+            "qdisc",
+            "gred"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$IP link add dev $DUMMY type dummy || /bin/true"
+        ],
+        "cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root gred setup vqs 10 default 2 harddrop",
+        "expExitCode": "0",
+        "verifyCmd": "$TC qdisc show dev $DUMMY",
+        "matchPattern": "qdisc gred 1: root refcnt [0-9]+ vqs 10 default 2.*harddrop",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DUMMY handle 1: root",
+            "$IP link del dev $DUMMY type dummy"
+        ]
+    },
+    {
+        "id": "763a",
+        "name": "Change GRED setting",
+        "category": [
+            "qdisc",
+            "gred"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$IP link add dev $DUMMY type dummy || /bin/true",
+            "$TC qdisc add dev $DUMMY handle 1: root gred setup vqs 10 default 1"
+        ],
+        "cmdUnderTest": "$TC qdisc change dev $DUMMY handle 1: root gred limit 60KB min 15K max 25K burst 64 avpkt 1500 bandwidth 10Mbit DP 1 probability 0.1",
+        "expExitCode": "0",
+        "verifyCmd": "$TC qdisc show dev $DUMMY",
+        "matchPattern": "qdisc gred 1: root refcnt [0-9]+ vqs 10 default 1 limit.*vq 1 prio [0-9]+ limit 60Kb min 15Kb max 25Kb",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DUMMY handle 1: root",
+            "$IP link del dev $DUMMY type dummy"
+        ]
+    },
+    {
+        "id": "8309",
+        "name": "Show GRED class",
+        "category": [
+            "qdisc",
+            "gred"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$IP link add dev $DUMMY type dummy || /bin/true"
+        ],
+        "cmdUnderTest": "$TC qdisc add dev $DUMMY handle 1: root gred setup vqs 10 default 1",
+        "expExitCode": "0",
+        "verifyCmd": "$TC class show dev $DUMMY",
+        "matchPattern": "class gred 1:",
+        "matchCount": "0",
+        "teardown": [
+            "$TC qdisc del dev $DUMMY handle 1: root",
+            "$IP link del dev $DUMMY type dummy"
+        ]
+    }
+]