set genev_sys_6081 tx checksum off (#3045)

Author: hongzhen-ma

cmd/daemon/init.go

@@ -3,7 +3,20 @@
 
 package daemon
 
+import (
+	"fmt"
+	"os/exec"
+
+	"k8s.io/klog/v2"
+)
+
 func initForOS() error {
-	// nothing to do on Linux
+	// disable checksum for genev_sys_6081 as default
+	cmd := exec.Command("sh", "-c", "ethtool -K genev_sys_6081 tx off")
+	if err := cmd.Run(); err != nil {
+		err := fmt.Errorf("failed to set checksum off for genev_sys_6081, %v", err)
+		// should not affect cni pod running if failed, just record err log
+		klog.Error(err)
+	}
 	return nil
 }