selftests/tc-testing: add selftests for mqprio qdisc

Test 9903: Add mqprio Qdisc to multi-queue device (8 queues)
Test 453a: Delete nonexistent mqprio Qdisc
Test 5292: Delete mqprio Qdisc twice
Test 45a9: Add mqprio Qdisc to single-queue device
Test 2ba9: Show mqprio class
Signed-off-by: NZhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: NVictor Nogueira <victor@mojatatu.com>
Tested-by: NVictor Nogueira <victor@mojatatu.com>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

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

+[
+    {
+        "id": "9903",
+        "name": "Add mqprio Qdisc to multi-queue device (8 queues)",
+        "category": [
+            "qdisc",
+            "mqprio"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "echo \"1 1 8\" > /sys/bus/netdevsim/new_device"
+        ],
+        "cmdUnderTest": "$TC qdisc add dev $ETH root handle 1: mqprio num_tc 8 map 0 1 2 3 4 5 6 7 queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 hw 0",
+        "expExitCode": "0",
+        "verifyCmd": "$TC qdisc show dev $ETH",
+        "matchPattern": "qdisc mqprio 1: root tc 8 map 0 1 2 3 4 5 6 7 0 0 0 0 0 0 0 0.*queues:\\(0:0\\) \\(1:1\\) \\(2:2\\) \\(3:3\\) \\(4:4\\) \\(5:5\\) \\(6:6\\) \\(7:7\\)",
+        "matchCount": "1",
+        "teardown": [
+            "echo \"1\" > /sys/bus/netdevsim/del_device"
+        ]
+    },
+    {
+        "id": "453a",
+        "name": "Delete nonexistent mqprio Qdisc",
+        "category": [
+            "qdisc",
+            "mqprio"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "echo \"1 1 4\" > /sys/bus/netdevsim/new_device"
+        ],
+        "cmdUnderTest": "$TC qdisc del dev $ETH root handle 1: mqprio",
+        "expExitCode": "2",
+        "verifyCmd": "$TC qdisc show dev $ETH",
+        "matchPattern": "qdisc mqprio 1: root",
+        "matchCount": "0",
+        "teardown": [
+            "echo \"1\" > /sys/bus/netdevsim/del_device"
+        ]
+    },
+    {
+        "id": "5292",
+        "name": "Delete mqprio Qdisc twice",
+        "category": [
+            "qdisc",
+            "mqprio"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "echo \"1 1 8\" > /sys/bus/netdevsim/new_device",
+            "$TC qdisc add dev $ETH root handle 1: mqprio num_tc 8 map 0 1 2 3 4 5 6 7 queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 hw 0",
+            "$TC qdisc del dev $ETH root handle 1:"
+        ],
+        "cmdUnderTest": "$TC qdisc del dev $ETH root handle 1:",
+        "expExitCode": "2",
+        "verifyCmd": "$TC qdisc show dev $ETH",
+        "matchPattern": "qdisc mqprio 1: root",
+        "matchCount": "0",
+        "teardown": [
+            "echo \"1\" > /sys/bus/netdevsim/del_device"
+        ]
+    },
+    {
+        "id": "45a9",
+        "name": "Add mqprio Qdisc to single-queue device",
+        "category": [
+            "qdisc",
+            "mqprio"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "echo \"1 1\" > /sys/bus/netdevsim/new_device"
+        ],
+        "cmdUnderTest": "$TC qdisc add dev $ETH root handle 1: mqprio num_tc 8 map 0 1 2 3 4 5 6 7 queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 hw 0",
+        "expExitCode": "2",
+        "verifyCmd": "$TC qdisc show dev $ETH",
+        "matchPattern": "qdisc mqprio 1: root",
+        "matchCount": "0",
+        "teardown": [
+            "echo \"1\" > /sys/bus/netdevsim/del_device"
+        ]
+    },
+    {
+        "id": "2ba9",
+        "name": "Show mqprio class",
+        "category": [
+            "qdisc",
+            "mqprio"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "echo \"1 1 8\" > /sys/bus/netdevsim/new_device"
+        ],
+        "cmdUnderTest": "$TC qdisc add dev $ETH root handle 1: mqprio num_tc 8 map 0 1 2 3 4 5 6 7 queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 hw 0",
+        "expExitCode": "0",
+        "verifyCmd": "$TC class show dev $ETH",
+        "matchPattern": "class mqprio 1:",
+        "matchCount": "16",
+        "teardown": [
+            "echo \"1\" > /sys/bus/netdevsim/del_device"
+        ]
+    }
+]