perf: enable tx offload again as upstream already fix it

(cherry picked from commit b4ce83a)

# Conflicts:
#	pkg/daemon/controller.go
#	pkg/daemon/ovs.go

pkg/daemon/controller.go

@@ -475,7 +475,9 @@ func (c *Controller) getPolicyRouting(subnet *kubeovnv1.Subnet) ([]netlink.Rule,
 	} else {
 		for i := range protocols {
 			rule.Family, _ = util.ProtocolToFamily(protocols[i])
-			_, rule.Src, _ = net.ParseCIDR(cidr[i])
+			if len(cidr) == len(protocols) {
+				_, rule.Src, _ = net.ParseCIDR(cidr[i])
+			}
 			rules = append(rules, *rule)
 		}
 	}
@@ -610,8 +612,6 @@ func (c *Controller) Run(stopCh <-chan struct{}) {
 
 	klog.Info("Started workers")
 	go wait.Until(c.loopOvn0Check, 5*time.Second, stopCh)
-	go wait.Until(c.disableTunnelOffload, 5*time.Second, stopCh)
-
 	go wait.Until(c.runSubnetWorker, time.Second, stopCh)
 	go wait.Until(c.runPodWorker, time.Second, stopCh)
 	go wait.Until(c.runGateway, 3*time.Second, stopCh)

pkg/daemon/ovs.go

@@ -293,16 +293,9 @@ func configureNodeNic(portName, ip, gw string, macAddr net.HardwareAddr, mtu int
 	if err = netlink.LinkSetTxQLen(hostLink, 1000); err != nil {
 		return fmt.Errorf("can not set host nic %s qlen %v", util.NodeNic, err)
 	}
-	// Double nat may lead kernel udp checksum error, disable offload to prevent this issue
-	// https://github.com/kubernetes/kubernetes/pull/92035
-	output, err := exec.Command("ethtool", "-K", "ovn0", "tx", "off").CombinedOutput()
-	if err != nil {
-		klog.Errorf("failed to disable checksum offload on ovn0, %v %q", err, output)
-		return err
-	}
 
 	// ping ovn0 gw to activate the flow
-	output, err = ovn0Check(gw)
+	output, err := ovn0Check(gw)
 	if err != nil {
 		klog.Errorf("failed to init ovn0 check, %v, %q", err, output)
 		return err
@@ -312,16 +305,6 @@ func configureNodeNic(portName, ip, gw string, macAddr net.HardwareAddr, mtu int
 	return nil
 }
 
-func (c *Controller) disableTunnelOffload() {
-	_, err := netlink.LinkByName("genev_sys_6081")
-	if err == nil {
-		output, err := exec.Command("ethtool", "-K", "genev_sys_6081", "tx", "off").CombinedOutput()
-		if err != nil {
-			klog.Errorf("failed to disable checksum offload on genev_sys_6081, %v %q", err, output)
-		}
-	}
-}
-
 // If OVS restart, the ovn0 port will down and prevent host to pod network,
 // Restart the kube-ovn-cni when this happens
 func (c *Controller) loopOvn0Check() {