[202412] Add packet trimming test cases (#18051)

tests/common/helpers/ptf_tests_helper.py

@@ -14,26 +14,47 @@
 
 
 @pytest.fixture(scope="module")
-def downstream_links(rand_selected_dut, tbinfo):
+def downstream_links(rand_selected_dut, tbinfo, nbrhosts):
     """
     Returns a dictionary of all the links that are downstream from the DUT.
 
     Args:
         rand_selected_dut: DUT fixture
         tbinfo: testbed information fixture
+        nbrhosts: neighbor host fixture
     Returns:
         links: Dictionary of links downstream from the DUT
     """
     links = dict()
     duthost = rand_selected_dut
 
     def filter(interface, neighbor, mg_facts, tbinfo):
-        if ((tbinfo["topo"]["type"] == "t0" and "Server" in neighbor["name"])
-                or (tbinfo["topo"]["type"] == "t1" and "T0" in neighbor["name"])):
-            port = mg_facts["minigraph_neighbors"][interface]["port"]
+        port = mg_facts["minigraph_neighbors"][interface]["port"]
+        ptf_port_id = mg_facts["minigraph_ptf_indices"][interface]
+        if tbinfo["topo"]["type"] == "t1" and "T0" in neighbor["name"]:
+            # Search for BGP neighbor information
+            local_ipv4_addr = None
+            peer_ipv4_addr = None
+            for item in mg_facts["minigraph_bgp"]:
+                if item["name"] == neighbor["name"]:
+                    if isinstance(ip_address(item["addr"]), IPv4Address):
+                        # The address of neighbor device
+                        local_ipv4_addr = item["addr"]
+                        # The address of DUT
+                        peer_ipv4_addr = item["peer_addr"]
+                        break
             links[interface] = {
                 "name": neighbor["name"],
-                "ptf_port_id": mg_facts["minigraph_ptf_indices"][interface],
+                "ptf_port_id": ptf_port_id,
+                "local_ipv4_addr": local_ipv4_addr,
+                "peer_ipv4_addr": peer_ipv4_addr,
+                "downstream_port": port,
+                "host": nbrhosts[neighbor["name"]]["host"]
+            }
+        elif tbinfo["topo"]["type"] == "t0" and "Server" in neighbor["name"]:
+            links[interface] = {
+                "name": neighbor["name"],
+                "ptf_port_id": ptf_port_id,
                 "downstream_port": port
             }
 
@@ -83,6 +104,47 @@ def filter(interface, neighbor, mg_facts, tbinfo):
     return links
 
 
+@pytest.fixture(scope="module")
+def peer_links(rand_selected_dut, tbinfo, nbrhosts):
+    """
+    Returns a dictionary of all the links that are service ports from the DUT.
+
+    Args:
+        rand_selected_dut: DUT fixture
+        tbinfo: testbed information fixture
+        nbrhosts: neighbor host fixture
+    Returns:
+        links: Dictionary of service links from the DUT
+    """
+    links = dict()
+    duthost = rand_selected_dut
+
+    def filter(interface, neighbor, mg_facts, tbinfo):
+        if "PT0" in neighbor["name"]:
+            local_ipv4_addr = None
+            peer_ipv4_addr = None
+            for item in mg_facts["minigraph_bgp"]:
+                if item["name"] == neighbor["name"]:
+                    if isinstance(ip_address(item["addr"]), IPv4Address):
+                        # The address of neighbor device
+                        local_ipv4_addr = item["addr"]
+                        # The address of DUT
+                        peer_ipv4_addr = item["peer_addr"]
+                        break
+            port = mg_facts["minigraph_neighbors"][interface]["port"]
+            links[interface] = {
+                "name": neighbor["name"],
+                "ptf_port_id": mg_facts["minigraph_ptf_indices"][interface],
+                "local_ipv4_addr": local_ipv4_addr,
+                "peer_ipv4_addr": peer_ipv4_addr,
+                "service_port": port,
+                "host": nbrhosts[neighbor["name"]]["host"]
+            }
+
+    find_links(duthost, tbinfo, filter)
+    return links
+
+
 def apply_dscp_cfg_setup(duthost, dscp_mode):
     """
     Applies the DSCP decap configuration to the DUT.

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -1073,6 +1073,12 @@ generic_config_updater/test_multiasic_linkcrc.py:
     conditions:
       - "(is_multi_asic is False)"
 
+generic_config_updater/test_packet_trimming_config.py:
+  skip:
+    reason: "KVM do not support the feature"
+    conditions:
+      - "asic_type in ['vs']"
+
 generic_config_updater/test_pfcwd_interval.py:
   skip:
     reason: "This test can only support mellanox platforms"
@@ -1613,6 +1619,15 @@ override_config_table/test_override_config_table.py:
     conditions:
       - "is_multi_asic==True"
 
+#######################################
+######       packet_trimming       #####
+########################################
+packet_trimming/test_packet_trimming.py:
+  skip:
+    reason: "KVM do not support the feature"
+    conditions:
+      - "asic_type in ['vs']"
+
 #######################################
 #####           pc               #####
 #######################################

tests/common/utilities.py

@@ -1455,3 +1455,23 @@ def get_vlan_from_port(duthost, member_port):
         if vlan_name is not None:
             break
     return vlan_name
+
+
+def configure_packet_aging(duthost, disabled=True):
+    """
+        For Nvidia(Mellanox) platforms, packets in buffer will be aged after a timeout.
+        This function can enable or disable packet aging feature.
+
+        Args:
+            duthost: DUT host object
+            disabled: True to disable packet aging, False to enable packet aging
+    """
+    logger.info("Starting configure packet aging")
+    asic = duthost.get_asic_name()
+    if 'spc' in asic:
+        action = "disable" if disabled else "enable"
+        logger.info(f"{action.capitalize()} Mellanox packet aging")
+        duthost.copy(src="qos/files/mellanox/packets_aging.py", dest="/tmp")
+        duthost.command("docker cp /tmp/packets_aging.py syncd:/")
+        duthost.command(f"docker exec syncd python /packets_aging.py {action}")
+        duthost.command("docker exec syncd rm -rf /packets_aging.py")