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-rw-r--r--test/test_vm_vpp_interfaces.py579
1 files changed, 579 insertions, 0 deletions
diff --git a/test/test_vm_vpp_interfaces.py b/test/test_vm_vpp_interfaces.py
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+++ b/test/test_vm_vpp_interfaces.py
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+#!/usr/bin/env python3
+import unittest
+from ipaddress import ip_address, ip_interface
+from vpp_qemu_utils import (
+ create_namespace,
+ delete_namespace,
+ create_host_interface,
+ delete_host_interfaces,
+ set_interface_mtu,
+ disable_interface_gso,
+ add_namespace_route,
+)
+from vpp_iperf import start_iperf, stop_iperf
+from framework import VppTestCase, VppTestRunner
+from config import config
+from vpp_papi import VppEnum
+import time
+import sys
+from vm_test_config import test_config
+
+#
+# Tests for:
+# - tapv2, tunv2 & af_packet_v2 & v3 interfaces.
+# - reads test config from the file vm_test_config.py
+# - Uses iPerf to send TCP/IP streams to VPP
+# - VPP ingress interface runs the iperf client
+# - VPP egress interface runs the iperf server
+# - Runs tests specified in the vm_test_config module and verifies that:
+# - TCP over IPv4 and IPv6 is enabled correctly for Bridged and Routed topologies.
+# sending jumbo frames (9000/9001 MTUs) with GSO/GRO is enabled correctly.
+# sending VPP buffer-sized frames(2048 MTU) with GSO/GRO is enabled correctly.
+# sending standard frames (1500 MTU) with GSO/GRO is enabled correctly.
+# sending smaller frames (512 MTU) with GSO/GRO is enabled correctly for IPv4
+# sending odd sized frames (9001, 2049 MTU) with GSO/GRO is enabled correctly.
+#
+
+
+def filter_tests(test):
+ """Filter test IDs to include only those selected to run."""
+ selection = test_config["tests_to_run"]
+ if not selection or selection == " ":
+ return True
+ else:
+ test_ids_to_run = []
+ for test_id in selection.split(","):
+ if "-" in test_id.strip():
+ start, end = map(int, test_id.split("-"))
+ test_ids_to_run.extend(list(range(start, end + 1)))
+ elif test_id.strip():
+ test_ids_to_run.append(int(test_id))
+ return test["id"] in test_ids_to_run
+
+
+# Test Config variables
+client_namespace = test_config["client_namespace"]
+server_namespace = test_config["server_namespace"]
+tests = filter(filter_tests, test_config["tests"])
+af_packet_config = test_config["af_packet"]
+layer2 = test_config["L2"]
+layer3 = test_config["L3"]
+
+
+def create_test(test_name, test, ip_version, mtu):
+ """Create and return a unittest method for a test."""
+
+ @unittest.skipUnless(config.extended, "part of extended tests")
+ def test_func(self):
+ self.logger.debug(f"Starting unittest:{test_name}")
+ self.setUpTestToplogy(test=test, ip_version=ip_version)
+ result = self.set_interfaces_mtu(
+ mtu=mtu,
+ ip_version=ip_version,
+ vpp_interfaces=self.vpp_interfaces,
+ linux_interfaces=self.linux_interfaces,
+ )
+ # Start the Iperf server in dual stack mode & run iperf client
+ if result is True:
+ start_iperf(ip_version=6, server_only=True, logger=self.logger)
+ self.assertTrue(
+ start_iperf(
+ ip_version=ip_version,
+ server_ipv4_address=self.server_ip4_address,
+ server_ipv6_address=self.server_ip6_address,
+ client_only=True,
+ duration=2,
+ logger=self.logger,
+ )
+ )
+ else:
+ print(
+ f"Skipping test:{test_name} as mtu:{mtu} is "
+ f"invalid for TCP/IPv{ip_version}"
+ )
+
+ test_func.__name__ = test_name
+ return test_func
+
+
+def generate_vpp_interface_tests():
+ """Generate unittests for testing vpp interfaces."""
+ for test in tests:
+ for ip_version in test_config["ip_versions"]:
+ for mtu in test_config["mtus"]:
+ test_name = (
+ f"test_id_{test['id']}_"
+ + f"client_{test['client_if_type']}"
+ + f"_v{test['client_if_version']}_"
+ + f"gso_{test.get('client_if_gso', 0)}_"
+ + f"gro_{test.get('client_if_gro', 0)}_"
+ + f"to_server_{test['server_if_type']}"
+ + f"_v{test['server_if_version']}_"
+ + f"gso_{test.get('server_if_gso', 0)}_"
+ + f"gro_{test.get('server_if_gro', 0)}_"
+ + f"mtu_{mtu}_mode_{test['x_connect_mode']}_"
+ + f"tcp_ipv{ip_version}"
+ )
+ test_func = create_test(
+ test_name=test_name, test=test, ip_version=ip_version, mtu=mtu
+ )
+ setattr(TestVPPInterfacesQemu, test_name, test_func)
+
+
+class TestVPPInterfacesQemu(VppTestCase):
+ """Test VPP interfaces inside a QEMU VM for IPv4/v6.
+
+ Test Setup:
+ Linux_ns1--iperfClient--host-int1--vpp-af_packet-int1--VPP-BD
+ --vppaf_packet_int2--host-int2--iperfServer--Linux_ns2
+ """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestVPPInterfacesQemu, cls).setUpClass()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(TestVPPInterfacesQemu, cls).tearDownClass()
+
+ def setUpTestToplogy(self, test, ip_version):
+ """Setup the test topology.
+
+ 1. Create Linux Namespaces for iPerf Client & Server.
+ 2. Create VPP iPerf client and server virtual interfaces.
+ 3. Enable desired vif features such as GSO & GRO.
+ 3. Cross-Connect interfaces in VPP using L2 or L3.
+ """
+ super(TestVPPInterfacesQemu, self).setUp()
+ client_if_type = test["client_if_type"]
+ server_if_type = test["server_if_type"]
+ client_if_version = test["client_if_version"]
+ server_if_version = test["server_if_version"]
+ x_connect_mode = test["x_connect_mode"]
+ # server ip4/ip6 addresses required by iperf client
+ server_ip4_prefix = (
+ layer2["server_ip4_prefix"]
+ if x_connect_mode == "L2"
+ else layer3["server_ip4_prefix"]
+ )
+ server_ip6_prefix = (
+ layer2["server_ip6_prefix"]
+ if x_connect_mode == "L2"
+ else layer3["server_ip6_prefix"]
+ )
+ self.server_ip4_address = str(ip_interface(server_ip4_prefix).ip)
+ self.server_ip6_address = str(ip_interface(server_ip6_prefix).ip)
+ # next-hop IP address on VPP for routing from client & server namespaces
+ vpp_client_prefix = (
+ layer3["vpp_client_ip4_prefix"]
+ if ip_version == 4
+ else layer3["vpp_client_ip6_prefix"]
+ )
+ vpp_client_nexthop = str(ip_interface(vpp_client_prefix).ip)
+ vpp_server_prefix = (
+ layer3["vpp_server_ip4_prefix"]
+ if ip_version == 4
+ else layer3["vpp_server_ip6_prefix"]
+ )
+ vpp_server_nexthop = str(ip_interface(vpp_server_prefix).ip)
+ create_namespace([client_namespace, server_namespace])
+ self.vpp_interfaces = []
+ self.linux_interfaces = []
+ enable_client_if_gso = test.get("client_if_gso", 0)
+ enable_server_if_gso = test.get("server_if_gso", 0)
+ enable_client_if_gro = test.get("client_if_gro", 0)
+ enable_server_if_gro = test.get("server_if_gro", 0)
+ ## Handle client interface types
+ if client_if_type == "af_packet":
+ create_host_interface(
+ af_packet_config["iprf_client_interface_on_linux"],
+ af_packet_config["iprf_client_interface_on_vpp"],
+ client_namespace,
+ layer2["client_ip4_prefix"]
+ if x_connect_mode == "L2"
+ else layer3["client_ip4_prefix"],
+ layer2["client_ip6_prefix"]
+ if x_connect_mode == "L2"
+ else layer3["client_ip6_prefix"],
+ )
+ self.ingress_if_idx = self.create_af_packet(
+ version=client_if_version,
+ host_if_name=af_packet_config["iprf_client_interface_on_vpp"],
+ enable_gso=enable_client_if_gso,
+ )
+ self.vpp_interfaces.append(self.ingress_if_idx)
+ self.linux_interfaces.append(
+ ["", af_packet_config["iprf_client_interface_on_vpp"]]
+ )
+ self.linux_interfaces.append(
+ [client_namespace, af_packet_config["iprf_client_interface_on_linux"]]
+ )
+ if enable_client_if_gso == 0:
+ disable_interface_gso(
+ "", af_packet_config["iprf_client_interface_on_vpp"]
+ )
+ disable_interface_gso(
+ client_namespace, af_packet_config["iprf_client_interface_on_linux"]
+ )
+ elif client_if_type == "tap" or client_if_type == "tun":
+ self.ingress_if_idx = self.create_tap_tun(
+ id=101,
+ host_namespace=client_namespace,
+ ip_version=ip_version,
+ host_ip4_prefix=layer2["client_ip4_prefix"]
+ if x_connect_mode == "L2"
+ else layer3["client_ip4_prefix"],
+ host_ip6_prefix=layer2["client_ip6_prefix"]
+ if x_connect_mode == "L2"
+ else layer3["client_ip6_prefix"],
+ host_ip4_gw=vpp_client_nexthop
+ if x_connect_mode == "L3" and ip_version == 4
+ else None,
+ host_ip6_gw=vpp_client_nexthop
+ if x_connect_mode == "L3" and ip_version == 6
+ else None,
+ int_type=client_if_type,
+ host_if_name=f"{client_if_type}0",
+ enable_gso=enable_client_if_gso,
+ enable_gro=enable_client_if_gro,
+ )
+ self.vpp_interfaces.append(self.ingress_if_idx)
+ self.linux_interfaces.append([client_namespace, f"{client_if_type}0"])
+ # Seeing TCP timeouts if tx=on & rx=on Linux tap & tun interfaces
+ disable_interface_gso(client_namespace, f"{client_if_type}0")
+ else:
+ print(
+ f"Unsupported client interface type: {client_if_type} "
+ f"for test - ID={test['id']}"
+ )
+ sys.exit(1)
+
+ if server_if_type == "af_packet":
+ create_host_interface(
+ af_packet_config["iprf_server_interface_on_linux"],
+ af_packet_config["iprf_server_interface_on_vpp"],
+ server_namespace,
+ server_ip4_prefix,
+ server_ip6_prefix,
+ )
+ self.egress_if_idx = self.create_af_packet(
+ version=server_if_version,
+ host_if_name=af_packet_config["iprf_server_interface_on_vpp"],
+ enable_gso=enable_server_if_gso,
+ )
+ self.vpp_interfaces.append(self.egress_if_idx)
+ self.linux_interfaces.append(
+ ["", af_packet_config["iprf_server_interface_on_vpp"]]
+ )
+ self.linux_interfaces.append(
+ [server_namespace, af_packet_config["iprf_server_interface_on_linux"]]
+ )
+ if enable_server_if_gso == 0:
+ disable_interface_gso(
+ "", af_packet_config["iprf_server_interface_on_vpp"]
+ )
+ disable_interface_gso(
+ server_namespace, af_packet_config["iprf_server_interface_on_linux"]
+ )
+ elif server_if_type == "tap" or server_if_type == "tun":
+ self.egress_if_idx = self.create_tap_tun(
+ id=102,
+ host_namespace=server_namespace,
+ ip_version=ip_version,
+ host_ip4_prefix=layer2["server_ip4_prefix"]
+ if x_connect_mode == "L2"
+ else layer3["server_ip4_prefix"],
+ host_ip6_prefix=layer2["server_ip6_prefix"]
+ if x_connect_mode == "L2"
+ else layer3["server_ip6_prefix"],
+ int_type=server_if_type,
+ host_if_name=f"{server_if_type}0",
+ enable_gso=enable_server_if_gso,
+ enable_gro=enable_server_if_gro,
+ )
+ self.vpp_interfaces.append(self.egress_if_idx)
+ self.linux_interfaces.append([server_namespace, f"{server_if_type}0"])
+ # Seeing TCP timeouts if tx=on & rx=on Linux tap & tun interfaces
+ disable_interface_gso(server_namespace, f"{server_if_type}0")
+ else:
+ print(
+ f"Unsupported server interface type: {server_if_type} "
+ f"for test - ID={test['id']}"
+ )
+ sys.exit(1)
+
+ if x_connect_mode == "L2":
+ self.l2_connect_interfaces(1, self.ingress_if_idx, self.egress_if_idx)
+ elif x_connect_mode == "L3":
+ # L3 connect client & server side
+ vrf_id = layer3["ip4_vrf"] if ip_version == 4 else layer3["ip6_vrf"]
+ self.l3_connect_interfaces(
+ ip_version,
+ vrf_id,
+ (self.ingress_if_idx, vpp_client_prefix),
+ (self.egress_if_idx, vpp_server_prefix),
+ )
+ # Setup namespace routing
+ if ip_version == 4:
+ add_namespace_route(client_namespace, "0.0.0.0/0", vpp_client_nexthop)
+ add_namespace_route(server_namespace, "0.0.0.0/0", vpp_server_nexthop)
+ else:
+ add_namespace_route(client_namespace, "::/0", vpp_client_nexthop)
+ add_namespace_route(server_namespace, "::/0", vpp_server_nexthop)
+ # Wait for Linux IPv6 stack to become ready
+ if ip_version == 6:
+ time.sleep(2)
+
+ def tearDown(self):
+ try:
+ self.vapi.tap_delete_v2(self.ingress_if_idx)
+ except Exception:
+ pass
+ try:
+ self.vapi.tap_delete_v2(self.egress_if_idx)
+ except Exception:
+ pass
+ try:
+ for interface in self.vapi.af_packet_dump():
+ if (
+ interface.host_if_name
+ == af_packet_config["iprf_client_interface_on_vpp"]
+ ):
+ self.vapi.af_packet_delete(
+ af_packet_config["iprf_client_interface_on_vpp"]
+ )
+ elif (
+ interface.host_if_name
+ == af_packet_config["iprf_server_interface_on_vpp"]
+ ):
+ self.vapi.af_packet_delete(
+ af_packet_config["iprf_server_interface_on_vpp"]
+ )
+ except Exception:
+ pass
+ try:
+ delete_host_interfaces(
+ af_packet_config["iprf_client_interface_on_linux"],
+ af_packet_config["iprf_server_interface_on_linux"],
+ af_packet_config["iprf_client_interface_on_vpp"],
+ af_packet_config["iprf_server_interface_on_vpp"],
+ )
+ except Exception:
+ pass
+ try:
+ self.vapi.ip_table_add_del(is_add=0, table={"table_id": layer3["ip4_vrf"]})
+ except Exception:
+ pass
+ try:
+ self.vapi.ip_table_add_del(is_add=0, table={"table_id": layer3["ip6_vrf"]})
+ except Exception:
+ pass
+ try:
+ delete_namespace(
+ [
+ client_namespace,
+ server_namespace,
+ ]
+ )
+ except Exception:
+ pass
+ try:
+ stop_iperf()
+ except Exception:
+ pass
+
+ def create_af_packet(self, version, host_if_name, enable_gso=0):
+ """Create an af_packetv3 interface in VPP.
+
+ Parameters:
+ version -- 2 for af_packet_create_v2
+ -- 3 for af_packet_create_v3
+ host_if_name -- host interface name
+ enable_gso -- Enable GSO on the interface when True
+ """
+ af_packet_mode = VppEnum.vl_api_af_packet_mode_t
+ af_packet_interface_mode = af_packet_mode.AF_PACKET_API_MODE_ETHERNET
+ af_packet_flags = VppEnum.vl_api_af_packet_flags_t
+ af_packet_interface_flags = af_packet_flags.AF_PACKET_API_FLAG_QDISC_BYPASS
+ if enable_gso:
+ af_packet_interface_flags = (
+ af_packet_interface_flags | af_packet_flags.AF_PACKET_API_FLAG_CKSUM_GSO
+ )
+ if version == 2:
+ af_packet_interface_flags = (
+ af_packet_interface_flags | af_packet_flags.AF_PACKET_API_FLAG_VERSION_2
+ )
+ api_args = {
+ "use_random_hw_addr": True,
+ "host_if_name": host_if_name,
+ "flags": af_packet_interface_flags,
+ }
+ api_args["mode"] = af_packet_interface_mode
+ result = self.vapi.af_packet_create_v3(**api_args)
+ sw_if_index = result.sw_if_index
+ # Enable software GSO chunking when interface doesn't support GSO offload
+ if enable_gso == 0:
+ self.vapi.feature_gso_enable_disable(
+ sw_if_index=sw_if_index, enable_disable=1
+ )
+ else:
+ self.vapi.feature_gso_enable_disable(
+ sw_if_index=sw_if_index, enable_disable=0
+ )
+ self.vapi.sw_interface_set_flags(sw_if_index=sw_if_index, flags=1)
+ return sw_if_index
+
+ def create_tap_tun(
+ self,
+ id,
+ host_namespace,
+ ip_version,
+ host_ip4_prefix=None,
+ host_ip6_prefix=None,
+ host_ip4_gw=None,
+ host_ip6_gw=None,
+ int_type="tap",
+ host_if_name=None,
+ enable_gso=0,
+ enable_gro=0,
+ ):
+ """Create a tapv2 or tunv2 interface in VPP and attach to host.
+
+ Parameters:
+ id -- interface ID
+ host_namespace -- host namespace to attach the tap/tun interface to
+ ip_version -- 4 or 6
+ host_ip4_prefix -- ipv4 host interface address in CIDR notation
+ if ip_version=4
+ host_ip6_prefix -- ipv6 host interface address in CIDR notation
+ if ip_version=6
+ host_ip4_gw -- host IPv4 default gateway IP Address
+ host_ip6_gw -- host IPv6 default gateway IP address
+ int_type -- "tap" for tapv2 & "tun" for tunv2 interface
+ host_if_name -- host side interface name
+ enable_gso -- enable GSO
+ enable_gro -- enable GSO/GRO-Coalesce
+ """
+ TapFlags = VppEnum.vl_api_tap_flags_t
+ tap_flags = 0
+ if int_type == "tun":
+ tap_flags = TapFlags.TAP_API_FLAG_TUN
+ if enable_gro:
+ tap_flags = tap_flags | (
+ TapFlags.TAP_API_FLAG_GSO | TapFlags.TAP_API_FLAG_GRO_COALESCE
+ )
+ elif enable_gso:
+ tap_flags = tap_flags | TapFlags.TAP_API_FLAG_GSO
+ elif int_type == "tap":
+ if enable_gro:
+ tap_flags = (
+ TapFlags.TAP_API_FLAG_GSO | TapFlags.TAP_API_FLAG_GRO_COALESCE
+ )
+ elif enable_gso:
+ tap_flags = TapFlags.TAP_API_FLAG_GSO
+
+ api_args = {
+ "id": id,
+ "host_namespace_set": True,
+ "host_namespace": host_namespace,
+ "host_if_name_set": False,
+ "host_bridge_set": False,
+ "host_mac_addr_set": False,
+ }
+ if tap_flags != 0:
+ api_args["tap_flags"] = tap_flags
+ if ip_version == 4:
+ api_args["host_ip4_prefix"] = ip_interface(host_ip4_prefix)
+ api_args["host_ip4_prefix_set"] = True
+ if host_ip4_gw:
+ api_args["host_ip4_gw"] = ip_address(host_ip4_gw)
+ api_args["host_ip4_gw_set"] = True
+ if ip_version == 6:
+ api_args["host_ip6_prefix"] = ip_interface(host_ip6_prefix)
+ api_args["host_ip6_prefix_set"] = True
+ if host_ip6_gw:
+ api_args["host_ip6_gw"] = ip_address(host_ip6_gw)
+ api_args["host_ip6_gw_set"] = True
+ if host_if_name:
+ api_args["host_if_name"] = host_if_name
+ api_args["host_if_name_set"] = True
+
+ result = self.vapi.tap_create_v2(**api_args)
+ sw_if_index = result.sw_if_index
+ # Enable software GSO chunking when interface doesn't support GSO offload and
+ # GRO coalesce
+ if enable_gso == 0 and enable_gro == 0:
+ self.vapi.feature_gso_enable_disable(
+ sw_if_index=sw_if_index, enable_disable=1
+ )
+ else:
+ self.vapi.feature_gso_enable_disable(
+ sw_if_index=sw_if_index, enable_disable=0
+ )
+ # Admin up
+ self.vapi.sw_interface_set_flags(sw_if_index=sw_if_index, flags=1)
+ return sw_if_index
+
+ def dump_bridge_domain_details(self, bd_id):
+ return self.vapi.bridge_domain_dump(bd_id=bd_id)
+
+ def l2_connect_interfaces(self, bridge_id, *sw_if_idxs):
+ for if_idx in sw_if_idxs:
+ self.vapi.sw_interface_set_l2_bridge(
+ rx_sw_if_index=if_idx, bd_id=bridge_id, shg=0, port_type=0, enable=True
+ )
+
+ def l3_connect_interfaces(self, ip_version, vrf_id, *if_idx_ip_prefixes):
+ """Setup routing for (if_idx, ip_prefix) inside VPP.
+
+ arguments:
+ if_idx_ip_prefixes -- sequence of (if_idx, ip_prefix) tuples
+ ip_version -- 4 or 6
+ vrf_id -- vrf_id
+ """
+ is_ipv6 = 0 if ip_version == 4 else 1
+ self.vapi.ip_table_add_del(
+ is_add=1, table={"table_id": vrf_id, "is_ip6": is_ipv6}
+ )
+ for sw_if_index, ip_prefix in if_idx_ip_prefixes:
+ self.vapi.sw_interface_set_table(
+ sw_if_index=sw_if_index, is_ipv6=is_ipv6, vrf_id=vrf_id
+ )
+ self.vapi.sw_interface_add_del_address(
+ sw_if_index=sw_if_index, is_add=1, prefix=ip_interface(ip_prefix)
+ )
+
+ def set_interfaces_mtu(self, mtu, ip_version, **kwargs):
+ """Set MTUs on VPP and Linux interfaces.
+
+ arguments --
+ mtu -- mtu value
+ ip_version - 4 or 6
+ kwargs['vpp_interfaces'] -- list of vpp interface if indexes
+ kwargs['linux_interfaces'] -- list of tuples (namespace, interface_names)
+ return True if mtu is set, else False
+ """
+ vpp_interfaces = kwargs.get("vpp_interfaces")
+ linux_interfaces = kwargs.get("linux_interfaces")
+ # IPv6 on Linux requires an MTU value >=1280
+ if (ip_version == 6 and mtu >= 1280) or ip_version == 4:
+ for sw_if_idx in vpp_interfaces:
+ self.vapi.sw_interface_set_mtu(
+ sw_if_index=sw_if_idx, mtu=[mtu, 0, 0, 0]
+ )
+ for namespace, interface_name in linux_interfaces:
+ set_interface_mtu(
+ namespace=namespace,
+ interface=interface_name,
+ mtu=mtu,
+ logger=self.logger,
+ )
+ return True
+ else:
+ return False
+
+
+generate_vpp_interface_tests()
+
+if __name__ == "__main__":
+ unittest.main(testRunner=VppTestRunner)