Support for 2nd interface validate_offload

eth0 is hardcoded as the interface for offload validation
which is used for the primary network.

Updated to support net1 and determine which interface to
use depending on the test type.

Signed-off-by: Venkat Kunaparaju <vkunaparaju@nvidia.com>

Author: vkunaparaju

pluginValidateOffload.py

@@ -481,29 +481,34 @@ def _thread_action() -> BaseOutput:
                 logger.info("There is no VF on an external server")
                 msg = "External Iperf Server"
             else:
+                ifname = (
+                    "net1"
+                    if self._perf_instance._network_type == "secondary"
+                    else "eth0"
+                )
                 # Get VF representor - use DPU mode if configured
                 if self._is_dpu_mode:
                     logger.info("DPU mode: querying VF representor from DPU cluster")
                     vf_rep = self._get_vf_rep_dpu_mode(
                         pod_name=self.perf_pod_name,
-                        ifname="eth0",
+                        ifname=ifname,
                     )
                 else:
                     vf_rep = self.pod_get_vf_rep(
                         pod_name=self.perf_pod_name,
-                        ifname="eth0",
+                        ifname=ifname,
                         host_pod_name=self.pod_name,
                     )
 
                 if vf_rep is None:
                     success_result = False
                     msg = "cannot determine VF_REP for pod"
                     logger.error(
-                        f"VF representor for {self.perf_pod_name} not detected"
+                        f"VF representor for {ifname} in {self.perf_pod_name} not detected"
                     )
                 else:
                     logger.info(
-                        f"VF representor for eth0 in pod {self.perf_pod_name} is {repr(vf_rep)}"
+                        f"VF representor for {ifname} in pod {self.perf_pod_name} is {repr(vf_rep)}"
                     )
                     ethtool_cmd = f"ethtool -S {vf_rep}"