[V1,2/2] tests/vf_l2fwd: add vf_l2fwd test script

diff --git a/tests/TestSuite_vf_l2fwd.py b/tests/TestSuite_vf_l2fwd.py
new file mode 100644
index 00000000..542838c6
--- /dev/null
+++ b/tests/TestSuite_vf_l2fwd.py
@@ -0,0 +1,136 @@ 
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2022 Intel Corporation
+#
+
+"""
+DPDK Test suite.
+Test Layer-2 Forwarding support
+"""
+import os
+import time
+
+import framework.utils as utils
+from framework.pktgen import PacketGeneratorHelper
+from framework.settings import HEADER_SIZE
+from framework.test_case import TestCase
+
+
+class TestVfL2fwd(TestCase):
+    def set_up_all(self):
+        """
+        Run at the start of each test suite.
+
+        L2fwd prerequisites.
+        """
+        self.core_config = "1S/4C/1T"
+        self.dut_ports = self.dut.get_ports()
+        self.test_queues = [
+            {"queues": 1, "Mpps": {}, "pct": {}},
+            {"queues": 2, "Mpps": {}, "pct": {}},
+            {"queues": 4, "Mpps": {}, "pct": {}},
+            {"queues": 8, "Mpps": {}, "pct": {}},
+        ]
+        self.number_of_ports = 2
+        self.headers_size = HEADER_SIZE["eth"] + HEADER_SIZE["ip"] + HEADER_SIZE["udp"]
+        self.verify(
+            len(self.dut_ports) >= self.number_of_ports,
+            "Not enough ports for " + self.nic,
+        )
+        self.ports_socket = self.dut.get_numa_id(self.dut_ports[0])
+        # compile
+        out = self.dut.build_dpdk_apps("./examples/l2fwd")
+        self.app_l2fwd_path = self.dut.apps_name["l2fwd"]
+
+    def set_up(self):
+        """
+        Run before each test case.
+        """
+        pass
+
+    def quit_l2fwd(self):
+        self.dut.send_expect("fg", "l2fwd ", 5)
+        self.dut.send_expect("^C", "# ", 5)
+
+    def test_vf_l2fwd_port_forward(self):
+        """
+        Check port forwarding testing.
+        """
+        VF_MAC_ADDR_port0 = "00:11:22:33:44:55"
+        VF_MAC_ADDR_port1 = "00:11:22:33:44:66"
+        # generate vf
+        self.dut.bind_interfaces_linux(self.kdriver)
+        self.dut.generate_sriov_vfs_by_port(self.dut_ports[0], 1, self.kdriver)
+        self.sriov_vfs_port_0 = self.dut.ports_info[self.dut_ports[0]]["vfs_port"]
+        self.verify(len(self.sriov_vfs_port_0) != 0, "VF create failed")
+        self.dut.generate_sriov_vfs_by_port(self.dut_ports[1], 1, self.kdriver)
+        self.sriov_vfs_port_1 = self.dut.ports_info[self.dut_ports[1]]["vfs_port"]
+        self.vf_ports = [self.sriov_vfs_port_0[0].pci, self.sriov_vfs_port_1[0].pci]
+        for port in self.sriov_vfs_port_0 + self.sriov_vfs_port_1:
+            port.bind_driver(self.drivername)
+
+        # set vf mac address
+        self.dut.send_expect(
+            "ip link set %s vf 0 mac %s"
+            % (self.dut.ports_info[self.dut_ports[0]]["intf"], VF_MAC_ADDR_port0),
+            "# ",
+        )
+        self.dut.send_expect(
+            "ip link set %s vf 0 mac %s"
+            % (self.dut.ports_info[self.dut_ports[1]]["intf"], VF_MAC_ADDR_port1),
+            "# ",
+        )
+        # the cases use the first two ports
+        port_mask = utils.create_mask([self.dut_ports[0], self.dut_ports[1]])
+        cores = self.dut.get_core_list(self.core_config, socket=self.ports_socket)
+        eal_params = self.dut.create_eal_parameters(cores=cores, ports=self.vf_ports)
+        for queues in self.test_queues:
+            command_line = "./%s  %s -- -q %s -p %s &" % (
+                self.app_l2fwd_path,
+                eal_params,
+                str(queues["queues"]),
+                port_mask,
+            )
+            self.dut.send_expect(command_line, "L2FWD: entering main loop", 60)
+            # Trigger the packet generator of bursting packets from ``port A``, then check if
+            # ``port 0`` could receive them and ``port 1`` could forward them back.
+            tgen_input = []
+            tx_port = self.tester.get_local_port(self.dut_ports[0])
+            rx_port = self.tester.get_local_port(self.dut_ports[1])
+            self.tester.is_interface_up(self.tester.get_interface(rx_port))
+            tgen_input.append((tx_port, rx_port))
+            self.logger.info("check port A -> port 0 -> port 1 -> port B")
+            result_B = self.tester.check_random_pkts(
+                tgen_input,
+                allow_miss=False,
+                params=[("ether", {"dst": "%s" % (VF_MAC_ADDR_port0)})],
+            )
+            # trigger the packet generator of bursting packets from ``port B``, then
+            # check if ``port 1`` could receive them and ``port 0`` could forward them back.
+            tgen_input = []
+            rx_port = self.tester.get_local_port(self.dut_ports[0])
+            tx_port = self.tester.get_local_port(self.dut_ports[1])
+            tgen_input.append((tx_port, rx_port))
+            self.logger.info("check port B -> port 1 -> port 0 -> port A")
+            result_A = self.tester.check_random_pkts(
+                tgen_input,
+                allow_miss=False,
+                params=[("ether", {"dst": "%s" % (VF_MAC_ADDR_port1)})],
+            )
+
+            self.verify(result_B != False, "result_B Packet integrity check failed")
+            self.verify(result_A != False, "result_A Packet integrity check failed")
+
+            self.quit_l2fwd()
+
+    def tear_down(self):
+        """
+        Run after each test case.
+        """
+        self.dut.send_expect("fg", "l2fwd|# ", 5)
+        self.dut.send_expect("^C", "# ", 5)
+
+    def tear_down_all(self):
+        """
+        Run after each test suite.
+        """
+        pass