Use netlink in GetNetDevLinkStatus()

Signed-off-by: Vasilis Remmas <vremmas@nvidia.com>

pkg/host/network.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/cenkalti/backoff"
+	"github.com/vishvananda/netlink"
 	"sigs.k8s.io/controller-runtime/pkg/log"
 
 	dputils "github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/utils"
@@ -231,12 +232,14 @@ func (n *network) GetNetDevLinkSpeed(ifaceName string) string {
 
 func (n *network) GetNetDevLinkStatus(ifaceName string) string {
 	log.Log.V(2).Info("GetNetDevLinkStatus(): get LinkStatus", "device", ifaceName)
-	statusFilePath := filepath.Join(vars.FilesystemRoot, consts.SysClassNet, ifaceName, "operstate")
-	data, err := os.ReadFile(statusFilePath)
-	if err != nil {
-		log.Log.Error(err, "GetNetDevLinkStatus(): fail to read Link Status file", "path", statusFilePath)
-		return ""
+	if len(ifaceName) > 0 {
+		link, err := netlink.LinkByName(ifaceName)
+		if err != nil {
+			log.Log.Error(err, "GetNetDevLinkStatus(): failed to get link", "device", ifaceName)
+			return ""
+		}
+		linkStatus := link.Attrs().OperState
+		return linkStatus.String()
 	}
-
-	return strings.TrimSpace(string(data))
+	return ""
 }