release netlink socket when stop monitoring

Author: PixelPixel00

pkg/daemon/controller/controller.go

@@ -249,14 +249,15 @@ func (c *CtrlHub) handleLocalNetworkDeviceEvent() error {
 	go func() {
 		for {
 			linkCh := make(chan netlink.LinkUpdate, LinkUpdateChainSize)
+			doneCh := make(chan struct{})
 			exitCh := make(chan struct{})
 
 			errorCallback := func(err error) {
 				c.logger.Error(err, "subscribe netlink link event exit with error")
 				close(exitCh)
 			}
 
-			if err := netlink.LinkSubscribeWithOptions(linkCh, nil, netlink.LinkSubscribeOptions{
+			if err := netlink.LinkSubscribeWithOptions(linkCh, doneCh, netlink.LinkSubscribeOptions{
 				Namespace:     &hostNetNs,
 				ErrorCallback: errorCallback,
 			}); err != nil {
@@ -277,6 +278,7 @@ func (c *CtrlHub) handleLocalNetworkDeviceEvent() error {
 						c.ipInstanceTriggerSourceForHostLink.Trigger()
 					}
 				case <-exitCh:
+					close(doneCh)
 					break linkLoop
 				}
 			}
@@ -286,14 +288,15 @@ func (c *CtrlHub) handleLocalNetworkDeviceEvent() error {
 	go func() {
 		for {
 			addrCh := make(chan netlink.AddrUpdate, AddrUpdateChainSize)
+			doneCh := make(chan struct{})
 			exitCh := make(chan struct{})
 
 			errorCallback := func(err error) {
 				c.logger.Error(err, "subscribe netlink addr event exit with error")
 				close(exitCh)
 			}
 
-			if err := netlink.AddrSubscribeWithOptions(addrCh, nil, netlink.AddrSubscribeOptions{
+			if err := netlink.AddrSubscribeWithOptions(addrCh, doneCh, netlink.AddrSubscribeOptions{
 				Namespace:     &hostNetNs,
 				ErrorCallback: errorCallback,
 			}); err != nil {
@@ -319,6 +322,7 @@ func (c *CtrlHub) handleLocalNetworkDeviceEvent() error {
 						c.nodeInfoTriggerSourceForHostAddr.Trigger()
 					}
 				case <-exitCh:
+					close(doneCh)
 					break addrLoop
 				}
 			}
@@ -426,14 +430,15 @@ func (c *CtrlHub) handleVxlanInterfaceNeighEvent() error {
 			}
 
 			neighCh := make(chan netlink.NeighUpdate, NeighUpdateChanSize)
+			doneCh := make(chan struct{})
 			exitCh := make(chan struct{})
 
 			errorCallback := func(err error) {
 				c.logger.Error(err, "subscribe netlink neigh event exit with error")
 				close(exitCh)
 			}
 
-			if err := netlink.NeighSubscribeWithOptions(neighCh, nil, netlink.NeighSubscribeOptions{
+			if err := netlink.NeighSubscribeWithOptions(neighCh, doneCh, netlink.NeighSubscribeOptions{
 				Namespace:     &hostNetNs,
 				ErrorCallback: errorCallback,
 			}); err != nil {
@@ -466,6 +471,7 @@ func (c *CtrlHub) handleVxlanInterfaceNeighEvent() error {
 						c.logger.Error(err, "failed to clear vxlan expired neigh caches")
 					}
 				case <-exitCh:
+					close(doneCh)
 					break neighLoop
 				}
 			}