selftests/tc-testings: add selftests for bpf filter

Test 23c3: Add cBPF filter with valid bytecode
Test 1563: Add cBPF filter with invalid bytecode
Test 2334: Add eBPF filter with valid object-file
Test 2373: Add eBPF filter with invalid object-file
Test 4423: Replace cBPF bytecode
Test 5122: Delete cBPF filter
Test e0a9: List cBPF filters
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Victor Nogueira <victor@mojatatu.com>
Tested-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/tc-testing/tc-tests/filters/bpf.json

+[
+    {
+        "id": "23c3",
+        "name": "Add cBPF filter with valid bytecode",
+        "category": [
+            "filter",
+            "bpf-filter"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$TC qdisc add dev $DEV1 ingress"
+        ],
+        "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf bytecode '4,40 0 0 12,21 0 1 2048,6 0 0 262144,6 0 0 0'",
+        "expExitCode": "0",
+        "verifyCmd": "$TC filter get dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf",
+        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1.*bytecode '4,40 0 0 12,21 0 1 2048,6 0 0 262144,6 0 0 0'",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 ingress"
+        ]
+    },
+    {
+        "id": "1563",
+        "name": "Add cBPF filter with invalid bytecode",
+        "category": [
+            "filter",
+            "bpf-filter"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$TC qdisc add dev $DEV1 ingress"
+        ],
+        "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf bytecode '4,40 0 0 12,31 0 1 2048,6 0 0 262144,6 0 0 0'",
+        "expExitCode": "2",
+        "verifyCmd": "$TC filter get dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf",
+        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1.*bytecode '4,40 0 0 12,21 0 1 2048,6 0 0 262144,6 0 0 0'",
+        "matchCount": "0",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 ingress"
+        ]
+    },
+    {
+        "id": "2334",
+        "name": "Add eBPF filter with valid object-file",
+        "category": [
+            "filter",
+            "bpf-filter"
+        ],
+        "plugins": {
+            "requires": "buildebpfPlugin"
+        },
+        "setup": [
+            "$TC qdisc add dev $DEV1 ingress"
+        ],
+        "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf object-file $EBPFDIR/action.o section action-ok",
+        "expExitCode": "0",
+        "verifyCmd": "$TC filter get dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf",
+        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1 action.o:\\[action-ok\\].*tag [0-9a-f]{16}( jited)?",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 ingress"
+        ]
+    },
+    {
+        "id": "2373",
+        "name": "Add eBPF filter with invalid object-file",
+        "category": [
+            "filter",
+            "bpf-filter"
+        ],
+        "plugins": {
+            "requires": "buildebpfPlugin"
+        },
+        "setup": [
+            "$TC qdisc add dev $DEV1 ingress"
+        ],
+        "cmdUnderTest": "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf object-file $EBPFDIR/action.o section action-ko",
+        "expExitCode": "1",
+        "verifyCmd": "$TC filter get dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf",
+        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1 action.o:\\[action-ko\\].*tag [0-9a-f]{16}( jited)?",
+        "matchCount": "0",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 ingress"
+        ]
+    },
+    {
+        "id": "4423",
+        "name": "Replace cBPF bytecode",
+        "category": [
+            "filter",
+            "bpf-filter"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$TC qdisc add dev $DEV1 ingress",
+            [
+                "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf bytecode '4,40 0 0 12,21 0 1 2048,6 0 0 262144,6 0 0 0'",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC filter replace dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf bytecode '4,40 0 0 12,21 0 1 2054,6 0 0 262144,6 0 0 0'",
+        "expExitCode": "0",
+        "verifyCmd": "$TC filter get dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf",
+        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1.*bytecode '4,40 0 0 12,21 0 1 2054,6 0 0 262144,6 0 0 0'",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 ingress"
+        ]
+    },
+    {
+        "id": "5122",
+        "name": "Delete cBPF filter",
+        "category": [
+            "filter",
+            "bpf-filter"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$TC qdisc add dev $DEV1 ingress",
+            [
+                "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf bytecode '4,40 0 0 12,21 0 1 2048,6 0 0 262144,6 0 0 0'",
+                0,
+                1,
+                255
+            ]
+        ],
+        "cmdUnderTest": "$TC filter del dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf",
+        "expExitCode": "0",
+        "verifyCmd": "$TC filter get dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf",
+        "matchPattern": "filter parent ffff: protocol ip pref 100 bpf chain [0-9]+ handle 0x1.*bytecode '4,40 0 0 12,21 0 1 2048,6 0 0 262144,6 0 0 0'",
+        "matchCount": "0",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 ingress"
+        ]
+    },
+    {
+        "id": "e0a9",
+        "name": "List cBPF filters",
+        "category": [
+            "filter",
+            "bpf-filter"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$TC qdisc add dev $DEV1 ingress",
+            "$TC filter add dev $DEV1 parent ffff: handle 1 protocol ip prio 100 bpf bytecode '4,40 0 0 12,21 0 1 2048,6 0 0 262144,6 0 0 0'",
+            "$TC filter add dev $DEV1 parent ffff: handle 2 protocol ip prio 100 bpf bytecode '4,40 0 0 12,21 0 1 2054,6 0 0 262144,6 0 0 0'",
+            "$TC filter add dev $DEV1 parent ffff: handle 100 protocol ip prio 100 bpf bytecode '4,40 0 0 12,21 0 1 33024,6 0 0 262144,6 0 0 0'"
+        ],
+        "cmdUnderTest": "$TC filter show dev $DEV1 parent ffff:",
+        "expExitCode": "0",
+        "verifyCmd": "$TC filter show dev $DEV1 parent ffff:",
+        "matchPattern": "filter protocol ip pref 100 bpf chain [0-9]+ handle",
+        "matchCount": "3",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 ingress"
+        ]
+    }
+]