/* * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.netvirt.vpnmanager; import com.google.common.base.Optional; import com.google.common.base.Preconditions; import java.math.BigInteger; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Objects; import org.opendaylight.controller.md.sal.binding.api.DataBroker; import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType; import org.opendaylight.genius.mdsalutil.MDSALUtil; import org.opendaylight.netvirt.bgpmanager.api.IBgpManager; import org.opendaylight.netvirt.vpnmanager.VpnOpDataSyncer.VpnOpDataType; import org.opendaylight.netvirt.vpnmanager.utilities.InterfaceUtils; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface.OperStatus; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid; import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService; import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.LockManagerService; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.vrfentries.VrfEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.PortOpData; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.SubnetOpData; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.TaskState; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.port.op.data.PortOpDataEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.port.op.data.PortOpDataEntryKey; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.subnet.op.data.SubnetOpDataEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.subnet.op.data.SubnetOpDataEntryBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.subnet.op.data.SubnetOpDataEntryKey; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.subnet.op.data.subnet.op.data.entry.SubnetToDpn; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ExternalNetworks; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.external.networks.Networks; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.external.networks.NetworksKey; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.NeutronvpnListener; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.PortAddedToSubnet; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.PortRemovedFromSubnet; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.RouterAssociatedToVpn; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.RouterDisassociatedFromVpn; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.SubnetAddedToVpn; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.SubnetAddedToVpnBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.SubnetDeletedFromVpn; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.SubnetDeletedFromVpnBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.SubnetUpdatedInVpn; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.Subnetmaps; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.subnetmaps.Subnetmap; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.subnetmaps.SubnetmapKey; import org.opendaylight.yangtools.yang.binding.InstanceIdentifier; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class VpnSubnetRouteHandler implements NeutronvpnListener { private static final Logger LOG = LoggerFactory.getLogger(VpnSubnetRouteHandler.class); private final DataBroker dataBroker; private final SubnetOpDpnManager subOpDpnManager; private final IBgpManager bgpManager; private final VpnInterfaceManager vpnInterfaceManager; private final IdManagerService idManager; private LockManagerService lockManager; private final VpnOpDataSyncer vpnOpDataSyncer; public VpnSubnetRouteHandler(final DataBroker dataBroker, final SubnetOpDpnManager subnetOpDpnManager, final IBgpManager bgpManager, final VpnInterfaceManager vpnIntfManager, final IdManagerService idManager, LockManagerService lockManagerService, final VpnOpDataSyncer vpnOpDataSyncer) { this.dataBroker = dataBroker; this.subOpDpnManager = subnetOpDpnManager; this.bgpManager = bgpManager; this.vpnInterfaceManager = vpnIntfManager; this.idManager = idManager; this.lockManager = lockManagerService; this.vpnOpDataSyncer = vpnOpDataSyncer; } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") @Override public void onSubnetAddedToVpn(SubnetAddedToVpn notification) { Uuid subnetId = notification.getSubnetId(); String vpnName = notification.getVpnName(); String subnetIp = notification.getSubnetIp(); Long elanTag = notification.getElanTag(); boolean isRouteAdvertised = false; Preconditions.checkNotNull(subnetId, "SubnetId cannot be null or empty!"); Preconditions.checkNotNull(subnetIp, "SubnetPrefix cannot be null or empty!"); Preconditions.checkNotNull(vpnName, "VpnName cannot be null or empty!"); Preconditions.checkNotNull(elanTag, "ElanTag cannot be null or empty!"); boolean isBgpVpn = notification.isBgpVpn(); LOG.trace("onSubnetAddedToVpn: Subnet {}, vpnName {}, SubnetIP {}, elanTag {}, isBgpVpn {}," + " being added to vpn", subnetId.getValue(), vpnName, subnetIp, elanTag, isBgpVpn); LOG.info("onSubnetAddedToVpn: Subnet {}, being added to vpn", subnetId.getValue()); long vpnId = VpnUtil.getVpnId(dataBroker, vpnName); if (vpnId == VpnConstants.INVALID_ID) { vpnOpDataSyncer.waitForVpnDataReady(VpnOpDataType.vpnInstanceToId, vpnName, VpnConstants.PER_VPN_INSTANCE_MAX_WAIT_TIME_IN_MILLISECONDS); vpnId = VpnUtil.getVpnId(dataBroker, vpnName); if (vpnId == VpnConstants.INVALID_ID) { LOG.error( "onSubnetAddedToVpn: VpnInstance to VPNId mapping not yet available for VpnName {} processing " + "subnet {} with IP {}, bailing out now.", vpnName, subnetId, subnetIp); return; } } //TODO(vivek): Change this to use more granularized lock at subnetId level try { VpnUtil.lockSubnet(lockManager, subnetId.getValue()); try { Subnetmap subMap = null; // Please check if subnetId belongs to an External Network InstanceIdentifier subMapid = InstanceIdentifier.builder(Subnetmaps.class).child(Subnetmap.class, new SubnetmapKey(subnetId)).build(); Optional sm = VpnUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, subMapid); if (!sm.isPresent()) { LOG.error("onSubnetAddedToVpn: Unable to retrieve subnetmap entry for subnet : " + subnetId); return; } subMap = sm.get(); if (isBgpVpn) { InstanceIdentifier netsIdentifier = InstanceIdentifier.builder(ExternalNetworks.class) .child(Networks.class, new NetworksKey(subMap.getNetworkId())).build(); Optional optionalNets = VpnUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, netsIdentifier); if (optionalNets.isPresent()) { LOG.info("onSubnetAddedToVpn: subnet {} is an external subnet on external network" + " {}," + " so ignoring this" + " for SubnetRoute", subnetId.getValue(), subMap.getNetworkId().getValue()); return; } } //Create and add SubnetOpDataEntry object for this subnet to the SubnetOpData container InstanceIdentifier subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class, new SubnetOpDataEntryKey(subnetId)).build(); Optional optionalSubs = VpnUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); if (optionalSubs.isPresent()) { LOG.error("onSubnetAddedToVpn: SubnetOpDataEntry for subnet {} already detected to be present", subnetId.getValue()); return; } LOG.debug("onSubnetAddedToVpn: Creating new SubnetOpDataEntry node for subnet: " + subnetId.getValue()); Map subDpnMap = new HashMap<>(); BigInteger dpnId = null; BigInteger nhDpnId = null; SubnetToDpn subDpn = null; SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder().setKey(new SubnetOpDataEntryKey(subnetId)); subOpBuilder.setSubnetId(subnetId); subOpBuilder.setSubnetCidr(subnetIp); String primaryRd = VpnUtil.getPrimaryRd(dataBroker, vpnName); if (isBgpVpn && !VpnUtil.isBgpVpn(vpnName, primaryRd)) { LOG.error("onSubnetAddedToVpn: The VPN Instance name " + notification.getVpnName() + " does not have RD "); return; } subOpBuilder.setVrfId(primaryRd); subOpBuilder.setVpnName(vpnName); subOpBuilder.setSubnetToDpn(new ArrayList<>()); subOpBuilder.setRouteAdvState(TaskState.Na); subOpBuilder.setElanTag(elanTag); // First recover set of ports available in this subnet List portList = subMap.getPortList(); if (portList != null) { for (Uuid port: portList) { Interface intfState = InterfaceUtils.getInterfaceStateFromOperDS(dataBroker,port.getValue()); if (intfState != null) { try { dpnId = InterfaceUtils.getDpIdFromInterface(intfState); } catch (Exception e) { LOG.error("onSubnetAddedToVpn: Unable to obtain dpnId for interface {},", " subnetroute inclusion for this interface failed with exception {}", port.getValue(), e); continue; } if (dpnId.equals(BigInteger.ZERO)) { LOG.info("onSubnetAddedToVpn: Port " + port.getValue() + " is not assigned DPN yet, ignoring "); continue; } subOpDpnManager.addPortOpDataEntry(port.getValue(), subnetId, dpnId); if (intfState.getOperStatus() != OperStatus.Up) { LOG.info("onSubnetAddedToVpn: Port " + port.getValue() + " is not UP yet, ignoring "); continue; } subDpn = subOpDpnManager.addInterfaceToDpn(subnetId, dpnId, port.getValue()); if (intfState.getOperStatus() == OperStatus.Up) { // port is UP subDpnMap.put(dpnId, subDpn); if (nhDpnId == null) { nhDpnId = dpnId; } } } else { subOpDpnManager.addPortOpDataEntry(port.getValue(), subnetId, null); } } if (subDpnMap.size() > 0) { subOpBuilder.setSubnetToDpn(new ArrayList<>(subDpnMap.values())); } } if (nhDpnId != null) { LOG.info("Next-Hop dpn {} is available for rd {} subnetIp {} vpn {}", nhDpnId, primaryRd, subnetIp, vpnName); subOpBuilder.setNhDpnId(nhDpnId); try { /* Write the subnet route entry to the FIB. And also advertise the subnet route entry via BGP. */ int label = getLabel(primaryRd, subnetIp); if (label == 0) { LOG.error( "Unable to fetch label from Id Manager. Bailing out of handling addition of subnet {}" + " to vpn {}", subnetIp, vpnName); return; } isRouteAdvertised = addSubnetRouteToFib(primaryRd, subnetIp, nhDpnId, vpnName, elanTag, label, subnetId, isBgpVpn, subMap.getNetworkId().getValue()); if (isRouteAdvertised) { subOpBuilder.setRouteAdvState(TaskState.Done); } else { subOpBuilder.setNhDpnId(null); subOpBuilder.setRouteAdvState(TaskState.Na); } } catch (Exception ex) { LOG.error( "onSubnetAddedToVpn: FIB rules and Advertising nhDpnId {} information for subnet {} to " + "BGP failed", nhDpnId, subnetId.getValue(), ex); subOpBuilder.setRouteAdvState(TaskState.Pending); } } else if (!isBgpVpn) { addSubnetRouteToFib(primaryRd, subnetIp, null, vpnName, elanTag, 0, subnetId, false, subMap.getNetworkId().getValue()); } else { LOG.info("Next-Hop dpn is unavailable for rd {} subnetIp {} vpn {}", primaryRd, subnetIp, vpnName); } SubnetOpDataEntry subOpEntry = subOpBuilder.build(); MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier, subOpEntry); LOG.info("onSubnetAddedToVpn: Added subnetopdataentry to OP Datastore for subnet {}", subnetId.getValue()); } catch (Exception ex) { LOG.error("Creation of SubnetOpDataEntry for subnet {} failed", subnetId.getValue(), ex); } finally { VpnUtil.unlockSubnet(lockManager, subnetId.getValue()); } } catch (Exception e) { LOG.error("Unable to handle subnet {} added to vpn {} {}", subnetIp, vpnName, e); } } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") @Override public void onSubnetDeletedFromVpn(SubnetDeletedFromVpn notification) { boolean isBgpVpn = notification.isBgpVpn(); Uuid subnetId = notification.getSubnetId(); LOG.info("onSubnetDeletedFromVpn: Subnet " + subnetId.getValue() + " being removed from vpn"); //TODO(vivek): Change this to use more granularized lock at subnetId level try { VpnUtil.lockSubnet(lockManager, subnetId.getValue()); try { InstanceIdentifier subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class, new SubnetOpDataEntryKey(subnetId)).build(); LOG.trace(" Removing the SubnetOpDataEntry node for subnet: " + subnetId.getValue()); Optional optionalSubs = VpnUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); if (!optionalSubs.isPresent()) { LOG.error("onSubnetDeletedFromVpn: SubnetOpDataEntry for subnet {} not available in datastore", subnetId.getValue()); return; } /* If subnet is deleted (or if its removed from VPN), the ports that are DOWN on that subnet * will continue to be stale in portOpData DS, as subDpnList used for portOpData removal will * contain only ports that are UP. So here we explicitly cleanup the ports of the subnet by * going through the list of ports on the subnet */ InstanceIdentifier subMapid = InstanceIdentifier.builder(Subnetmaps.class).child(Subnetmap.class, new SubnetmapKey(subnetId)).build(); Optional sm = VpnUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, subMapid); if (!sm.isPresent()) { LOG.error("Stale ports removal: Unable to retrieve subnetmap entry for subnet : " + subnetId); } else { Subnetmap subMap = sm.get(); List portList = subMap.getPortList(); if (portList != null) { for (Uuid port : portList) { InstanceIdentifier portOpIdentifier = InstanceIdentifier.builder(PortOpData.class).child(PortOpDataEntry.class, new PortOpDataEntryKey(port.getValue())).build(); LOG.trace("Deleting portOpData entry for port " + port.getValue()); MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.OPERATIONAL, portOpIdentifier); } } } SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get()); String rd = subOpBuilder.getVrfId(); String subnetIp = subOpBuilder.getSubnetCidr(); String vpnName = subOpBuilder.getVpnName(); BigInteger nhDpnId = subOpBuilder.getNhDpnId(); MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); LOG.info("onSubnetDeletedFromVpn: Removed subnetopdataentry for subnet {} successfully from Datastore", subnetId.getValue()); try { //Withdraw the routes for all the interfaces on this subnet //Remove subnet route entry from FIB deleteSubnetRouteFromFib(rd, subnetIp, vpnName, isBgpVpn); } catch (Exception ex) { LOG.error("onSubnetAddedToVpn: Withdrawing routes from BGP for subnet {} failed", subnetId.getValue(), ex); } } catch (Exception ex) { LOG.error("Removal of SubnetOpDataEntry for subnet {} failed", subnetId.getValue(), ex); } finally { VpnUtil.unlockSubnet(lockManager, subnetId.getValue()); } } catch (Exception e) { LOG.error("Unable to handle subnet {} removed to vpn {}", notification.getSubnetIp(), notification.getVpnName(), e); } } @Override public void onSubnetUpdatedInVpn(SubnetUpdatedInVpn notification) { Uuid subnetId = notification.getSubnetId(); String vpnName = notification.getVpnName(); String subnetIp = notification.getSubnetIp(); Long elanTag = notification.getElanTag(); Preconditions.checkNotNull(subnetId, "SubnetId cannot be null or empty!"); Preconditions.checkNotNull(subnetIp, "SubnetPrefix cannot be null or empty!"); Preconditions.checkNotNull(vpnName, "VpnName cannot be null or empty!"); Preconditions.checkNotNull(elanTag, "ElanTag cannot be null or empty!"); InstanceIdentifier subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class, new SubnetOpDataEntryKey(subnetId)).build(); Optional optionalSubs = VpnUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); if (optionalSubs.isPresent()) { if (!notification.isBgpVpn()) { SubnetDeletedFromVpnBuilder bldr = new SubnetDeletedFromVpnBuilder().setVpnName(vpnName); bldr.setElanTag(elanTag).setBgpVpn(notification.isBgpVpn()).setSubnetIp(subnetIp) .setSubnetId(subnetId); onSubnetDeletedFromVpn(bldr.build()); } // TODO(vivek): Something got updated, but we donot know what ? } else { if (notification.isBgpVpn()) { SubnetAddedToVpnBuilder bldr = new SubnetAddedToVpnBuilder().setVpnName(vpnName).setElanTag(elanTag); bldr.setSubnetIp(subnetIp).setSubnetId(subnetId).setBgpVpn(notification.isBgpVpn()); onSubnetAddedToVpn(bldr.build()); } // TODO(vivek): Something got updated, but we donot know what ? } } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") @Override public void onPortAddedToSubnet(PortAddedToSubnet notification) { Uuid subnetId = notification.getSubnetId(); Uuid portId = notification.getPortId(); boolean isRouteAdvertised = false; LOG.info("onPortAddedToSubnet: Port " + portId.getValue() + " being added to subnet " + subnetId.getValue()); //TODO(vivek): Change this to use more granularized lock at subnetId level try { VpnUtil.lockSubnet(lockManager, subnetId.getValue()); try { InstanceIdentifier subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class, new SubnetOpDataEntryKey(subnetId)).build(); Optional optionalSubs = VpnUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); if (!optionalSubs.isPresent()) { LOG.info("onPortAddedToSubnet: Port {} is part of a subnet {} that is not in VPN, ignoring", portId.getValue(), subnetId.getValue()); return; } Interface intfState = InterfaceUtils.getInterfaceStateFromOperDS(dataBroker,portId.getValue()); if (intfState == null) { // Interface State not yet available subOpDpnManager.addPortOpDataEntry(portId.getValue(), subnetId, null); return; } BigInteger dpnId = BigInteger.ZERO; try { dpnId = InterfaceUtils.getDpIdFromInterface(intfState); } catch (Exception e) { LOG.error("onSubnetAddedToVpn: Unable to obtain dpnId for interface {},", " subnetroute inclusion for this interface failed with exception {}", portId.getValue(), e); return; } if (dpnId.equals(BigInteger.ZERO)) { LOG.info("onPortAddedToSubnet: Port " + portId.getValue() + " is not assigned DPN yet, ignoring "); return; } subOpDpnManager.addPortOpDataEntry(portId.getValue(), subnetId, dpnId); if (intfState.getOperStatus() != OperStatus.Up) { LOG.info("onPortAddedToSubnet: Port " + portId.getValue() + " is not UP yet, ignoring "); return; } LOG.debug("onPortAddedToSubnet: Updating the SubnetOpDataEntry node for subnet {}", subnetId.getValue()); SubnetToDpn subDpn = subOpDpnManager.addInterfaceToDpn(subnetId, dpnId, portId.getValue()); if (subDpn == null) { return; } SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get()); List subDpnList = subOpBuilder.getSubnetToDpn(); subDpnList.add(subDpn); subOpBuilder.setSubnetToDpn(subDpnList); if (subOpBuilder.getNhDpnId() == null) { subOpBuilder.setNhDpnId(dpnId); } BigInteger nhDpnId = subOpBuilder.getNhDpnId(); String rd = subOpBuilder.getVrfId(); String subnetIp = subOpBuilder.getSubnetCidr(); String vpnName = subOpBuilder.getVpnName(); Long elanTag = subOpBuilder.getElanTag(); if ((subOpBuilder.getRouteAdvState() == TaskState.Pending) || (subOpBuilder.getRouteAdvState() == TaskState.Na)) { try { // Write the Subnet Route Entry to FIB // Advertise BGP Route here and set route_adv_state to DONE int label = getLabel(rd, subnetIp); if (label == 0) { LOG.error( "Unable to fetch label from Id Manager. Bailing out of handling addition of port {} " + "to subnet {} in vpn {}", portId.getValue(), subnetIp, vpnName); return; } isRouteAdvertised = addSubnetRouteToFib(rd, subnetIp, nhDpnId, vpnName, elanTag, label, subnetId); if (isRouteAdvertised) { subOpBuilder.setRouteAdvState(TaskState.Done); } else { subOpBuilder.setNhDpnId(null); subOpBuilder.setRouteAdvState(TaskState.Na); } } catch (Exception ex) { LOG.error( "onPortAddedToSubnet: Advertising NextHopDPN {} information for subnet {} to BGP failed", nhDpnId, subnetId.getValue(), ex); } } SubnetOpDataEntry subOpEntry = subOpBuilder.build(); MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier, subOpEntry); LOG.info("onPortAddedToSubnet: Updated subnetopdataentry to OP Datastore for port {}", portId.getValue()); } catch (Exception ex) { LOG.error("Creation of SubnetOpDataEntry for subnet {} failed", subnetId.getValue(), ex); } finally { VpnUtil.unlockSubnet(lockManager, subnetId.getValue()); } } catch (Exception e) { LOG.error("Unable to handle port {} added to subnet {} {}", portId.getValue(), subnetId.getValue(), e); } } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") @Override public void onPortRemovedFromSubnet(PortRemovedFromSubnet notification) { Uuid subnetId = notification.getSubnetId(); Uuid portId = notification.getPortId(); boolean isRouteAdvertised = false; LOG.info( "onPortRemovedFromSubnet: Port " + portId.getValue() + " being removed from subnet " + subnetId.getValue()); //TODO(vivek): Change this to use more granularized lock at subnetId level try { VpnUtil.lockSubnet(lockManager, subnetId.getValue()); try { PortOpDataEntry portOpEntry = subOpDpnManager.removePortOpDataEntry(portId.getValue()); if (portOpEntry == null) { return; } BigInteger dpnId = portOpEntry.getDpnId(); if (dpnId == null) { LOG.debug("onPortRemovedFromSubnet: Port {} does not have a DPNId associated, ignoring", portId.getValue()); return; } LOG.debug( "onPortRemovedFromSubnet: Updating the SubnetOpDataEntry node for subnet: " + subnetId.getValue()); boolean last = subOpDpnManager.removeInterfaceFromDpn(subnetId, dpnId, portId.getValue()); InstanceIdentifier subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class, new SubnetOpDataEntryKey(subnetId)).build(); Optional optionalSubs = VpnUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); if (!optionalSubs.isPresent()) { LOG.info("onPortRemovedFromSubnet: Port {} is part of a subnet {} that is not in VPN, ignoring", portId.getValue(), subnetId.getValue()); return; } SubnetOpDataEntry subOpEntry = null; List subDpnList = null; SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get()); String rd = subOpBuilder.getVrfId(); String subnetIp = subOpBuilder.getSubnetCidr(); String vpnName = subOpBuilder.getVpnName(); Long elanTag = subOpBuilder.getElanTag(); BigInteger nhDpnId = subOpBuilder.getNhDpnId(); if ((nhDpnId != null) && (nhDpnId.equals(dpnId))) { // select another NhDpnId if (last) { LOG.debug("onPortRemovedFromSubnet: Last port {} on the subnet {}", portId, subnetId.getValue()); // last port on this DPN, so we need to swap the NHDpnId subDpnList = subOpBuilder.getSubnetToDpn(); if (subDpnList.isEmpty()) { subOpBuilder.setNhDpnId(null); try { // withdraw route from BGP deleteSubnetRouteFromFib(rd, subnetIp, vpnName, true /* isBgpVpn*/); subOpBuilder.setRouteAdvState(TaskState.Na); } catch (Exception ex) { LOG.error( "onPortRemovedFromSubnet: Withdrawing NextHopDPN {} information for subnet {} " + "from BGP failed ", dpnId, subnetId.getValue(), ex); subOpBuilder.setRouteAdvState(TaskState.Pending); } } else { nhDpnId = subDpnList.get(0).getDpnId(); subOpBuilder.setNhDpnId(nhDpnId); LOG.debug("onInterfaceDown: Swapping the Designated DPN to {} for subnet {}", nhDpnId, subnetId.getValue()); try { // Best effort Withdrawal of route from BGP for this subnet // Advertise the new NexthopIP to BGP for this subnet //withdrawSubnetRoutefromBgp(rd, subnetIp); int label = getLabel(rd, subnetIp); if (label == 0) { LOG.error( "Unable to fetch label from Id Manager. Bailing out of handling removal of " + "port {} from subnet {} in vpn {}", portId.getValue(), subnetIp, vpnName); return; } isRouteAdvertised = addSubnetRouteToFib(rd, subnetIp, nhDpnId, vpnName, elanTag, label, subnetId); if (isRouteAdvertised) { subOpBuilder.setRouteAdvState(TaskState.Done); } else { subOpBuilder.setNhDpnId(null); subOpBuilder.setRouteAdvState(TaskState.Na); } } catch (Exception ex) { LOG.error( "onPortRemovedFromSubnet: Swapping Withdrawing NextHopDPN {} information for " + "subnet {} to BGP failed", dpnId, subnetId.getValue(), ex); subOpBuilder.setRouteAdvState(TaskState.Pending); } } } } subOpEntry = subOpBuilder.build(); MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier, subOpEntry); LOG.info( "onPortRemovedFromSubnet: Updated subnetopdataentry to OP Datastore removing port " + portId .getValue()); } catch (Exception ex) { LOG.error("Creation of SubnetOpDataEntry for subnet {} failed", subnetId.getValue(), ex); } finally { VpnUtil.unlockSubnet(lockManager, subnetId.getValue()); } } catch (Exception e) { LOG.error("Unable to handle port {} removed from subnet {} {}", portId.getValue(), subnetId.getValue(), e); } } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") public void onInterfaceUp(BigInteger dpnId, String intfName) { LOG.info("onInterfaceUp: Port " + intfName); //TODO(vivek): Change this to use more granularized lock at subnetId level SubnetToDpn subDpn = null; boolean isRouteAdvertised = false; PortOpDataEntry portOpEntry = subOpDpnManager.getPortOpDataEntry(intfName); if (portOpEntry == null) { LOG.info("onInterfaceUp: Port " + intfName + "is part of a subnet not in VPN, ignoring"); return; } if ((dpnId == null) || (Objects.equals(dpnId, BigInteger.ZERO))) { dpnId = portOpEntry.getDpnId(); if (dpnId == null) { LOG.error("onInterfaceUp: Unable to determine the DPNID for port " + intfName); return; } } Uuid subnetId = portOpEntry.getSubnetId(); try { VpnUtil.lockSubnet(lockManager, subnetId.getValue()); try { InstanceIdentifier subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class, new SubnetOpDataEntryKey(subnetId)).build(); Optional optionalSubs = VpnUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); if (!optionalSubs.isPresent()) { LOG.error("onInterfaceUp: SubnetOpDataEntry for subnet {} is not available", subnetId.getValue()); return; } LOG.debug("onInterfaceUp: Updating the SubnetOpDataEntry node for subnet: " + subnetId.getValue()); subOpDpnManager.addPortOpDataEntry(intfName, subnetId, dpnId); subDpn = subOpDpnManager.addInterfaceToDpn(subnetId, dpnId, intfName); if (subDpn == null) { return; } SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get()); List subDpnList = subOpBuilder.getSubnetToDpn(); subDpnList.add(subDpn); subOpBuilder.setSubnetToDpn(subDpnList); if (subOpBuilder.getNhDpnId() == null) { subOpBuilder.setNhDpnId(dpnId); } BigInteger nhDpnId = subOpBuilder.getNhDpnId(); String rd = subOpBuilder.getVrfId(); String subnetIp = subOpBuilder.getSubnetCidr(); String vpnName = subOpBuilder.getVpnName(); Long elanTag = subOpBuilder.getElanTag(); if ((subOpBuilder.getRouteAdvState() == TaskState.Pending) || (subOpBuilder.getRouteAdvState() == TaskState.Na)) { try { // Write the Subnet Route Entry to FIB // Advertise BGP Route here and set route_adv_state to DONE int label = getLabel(rd, subnetIp); if (label == 0) { LOG.error( "Unable to fetch label from Id Manager. Bailing out of handling interface up event " + "for port {} for subnet {} in vpn {}", intfName, subnetIp, vpnName); return; } isRouteAdvertised = addSubnetRouteToFib(rd, subnetIp, nhDpnId, vpnName, elanTag, label, subnetId); if (isRouteAdvertised) { subOpBuilder.setRouteAdvState(TaskState.Done); } else { subOpBuilder.setNhDpnId(null); subOpBuilder.setRouteAdvState(TaskState.Na); } } catch (Exception ex) { LOG.error("onInterfaceUp: Advertising NextHopDPN {} information for subnet {} to BGP failed", nhDpnId, subnetId.getValue(), ex); } } SubnetOpDataEntry subOpEntry = subOpBuilder.build(); MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier, subOpEntry); LOG.info("onInterfaceUp: Updated subnetopdataentry to OP Datastore port up " + intfName); } catch (Exception ex) { LOG.error("Creation of SubnetOpDataEntry for subnet {} failed", subnetId.getValue(), ex); } finally { VpnUtil.unlockSubnet(lockManager, subnetId.getValue()); } } catch (Exception e) { LOG.error("Unable to handle interface up event for port {} in subnet {} {}", portOpEntry.getPortId(), subnetId.getValue(), e); } } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") public void onInterfaceDown(final BigInteger dpnId, final String interfaceName) { boolean isRouteAdvertised = false; LOG.info("onInterfaceDown: Port " + interfaceName); //TODO(vivek): Change this to use more granularized lock at subnetId level PortOpDataEntry portOpEntry = subOpDpnManager.getPortOpDataEntry(interfaceName); if (portOpEntry == null) { LOG.info("onInterfaceDown: Port " + interfaceName + "is part of a subnet not in VPN, ignoring"); return; } if ((dpnId == null) || (Objects.equals(dpnId, BigInteger.ZERO))) { LOG.error("onInterfaceDown: Unable to determine the DPNID for port " + interfaceName); return; } Uuid subnetId = portOpEntry.getSubnetId(); try { VpnUtil.lockSubnet(lockManager, subnetId.getValue()); try { LOG.debug("onInterfaceDown: Updating the SubnetOpDataEntry node for subnet: " + subnetId.getValue()); boolean last = subOpDpnManager.removeInterfaceFromDpn(subnetId, dpnId, interfaceName); InstanceIdentifier subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class, new SubnetOpDataEntryKey(subnetId)).build(); Optional optionalSubs = VpnUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); if (!optionalSubs.isPresent()) { LOG.error("onInterfaceDown: SubnetOpDataEntry for subnet {} is not available", subnetId.getValue()); return; } SubnetOpDataEntry subOpEntry = null; List subDpnList = null; SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get()); String rd = subOpBuilder.getVrfId(); String subnetIp = subOpBuilder.getSubnetCidr(); String vpnName = subOpBuilder.getVpnName(); Long elanTag = subOpBuilder.getElanTag(); BigInteger nhDpnId = subOpBuilder.getNhDpnId(); if ((nhDpnId != null) && (nhDpnId.equals(dpnId))) { // select another NhDpnId if (last) { LOG.debug( "onInterfaceDown: Last active port " + interfaceName + " on the subnet: " + subnetId .getValue()); // last port on this DPN, so we need to swap the NHDpnId subDpnList = subOpBuilder.getSubnetToDpn(); if (subDpnList.isEmpty()) { subOpBuilder.setNhDpnId(null); try { // Withdraw route from BGP for this subnet deleteSubnetRouteFromFib(rd, subnetIp, vpnName, true /* isBgpVpn*/); subOpBuilder.setRouteAdvState(TaskState.Na); } catch (Exception ex) { LOG.error( "onInterfaceDown: Withdrawing NextHopDPN {} information for subnet {} from BGP " + "failed", dpnId, subnetId.getValue(), ex); subOpBuilder.setRouteAdvState(TaskState.Pending); } } else { nhDpnId = subDpnList.get(0).getDpnId(); subOpBuilder.setNhDpnId(nhDpnId); LOG.debug( "onInterfaceDown: Swapping the Designated DPN to {} for subnet {}" , nhDpnId, subnetId.getValue()); try { // Best effort Withdrawal of route from BGP for this subnet //withdrawSubnetRoutefromBgp(rd, subnetIp); int label = getLabel(rd, subnetIp); if (label == 0) { LOG.error( "Unable to fetch label from Id Manager. Bailing out of handling interface " + "down event for port {} in subnet {} for vpn {}", interfaceName, subnetIp, vpnName); return; } isRouteAdvertised = addSubnetRouteToFib(rd, subnetIp, nhDpnId, vpnName, elanTag, label, subnetId); if (isRouteAdvertised) { subOpBuilder.setRouteAdvState(TaskState.Done); } else { subOpBuilder.setNhDpnId(null); subOpBuilder.setRouteAdvState(TaskState.Na); } } catch (Exception ex) { LOG.error( "onInterfaceDown: Swapping Withdrawing NextHopDPN {} information for " + "subnet {} to BGP failed", dpnId, subnetId.getValue(), ex); subOpBuilder.setRouteAdvState(TaskState.Pending); } } } } subOpEntry = subOpBuilder.build(); MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier, subOpEntry); LOG.info("onInterfaceDown: Updated subnetopdataentry to OP Datastore port down " + interfaceName); } catch (Exception ex) { LOG.error("Creation of SubnetOpDataEntry for subnet {} failed", subnetId.getValue(), ex); } finally { VpnUtil.unlockSubnet(lockManager, subnetId.getValue()); } } catch (Exception e) { LOG.error("Unable to handle interface down event for port {} in subnet {} {}", portOpEntry.getPortId(), subnetId.getValue(), e); } } @Override public void onRouterAssociatedToVpn(RouterAssociatedToVpn notification) { } @Override public void onRouterDisassociatedFromVpn(RouterDisassociatedFromVpn notification) { } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") public void updateSubnetRouteOnTunnelUpEvent(Uuid subnetId, BigInteger dpnId) { boolean isRouteAdvertised = false; LOG.info("updateSubnetRouteOnTunnelUpEvent: Subnet {} Dpn {}", subnetId.getValue(), dpnId.toString()); try { VpnUtil.lockSubnet(lockManager, subnetId.getValue()); try { InstanceIdentifier subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class, new SubnetOpDataEntryKey(subnetId)).build(); Optional optionalSubs = VpnUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); if (!optionalSubs.isPresent()) { LOG.error("updateSubnetRouteOnTunnelUpEvent: SubnetOpDataEntry for subnet {} is not available", subnetId.getValue()); return; } SubnetOpDataEntry subOpEntry = null; SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get()); String rd = subOpBuilder.getVrfId(); String subnetIp = subOpBuilder.getSubnetCidr(); String vpnName = subOpBuilder.getVpnName(); List subDpnList = subOpBuilder.getSubnetToDpn(); long elanTag = subOpBuilder.getElanTag(); if ((subOpBuilder.getRouteAdvState() == TaskState.Pending) || (subOpBuilder.getRouteAdvState() == TaskState.Na)) { for (SubnetToDpn subDpn : subDpnList) { if (subDpn.getDpnId().equals(dpnId)) { if (subOpBuilder.getNhDpnId() == null) { try { subOpBuilder.setNhDpnId(dpnId); int label = getLabel(rd, subnetIp); isRouteAdvertised = addSubnetRouteToFib(rd, subnetIp, dpnId, vpnName, elanTag, label, subnetId); if (isRouteAdvertised) { subOpBuilder.setRouteAdvState(TaskState.Done); } else { subOpBuilder.setNhDpnId(null); subOpBuilder.setRouteAdvState(TaskState.Na); } } catch (Exception ex) { LOG.error( "updateSubnetRouteOnTunnelUpEvent: Advertising NextHopDPN {} information for " + "subnet {} to BGP failed", dpnId, subnetId.getValue(), ex); } } } } subOpEntry = subOpBuilder.build(); MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier, subOpEntry); LOG.info( "updateSubnetRouteOnTunnelUpEvent: Updated subnetopdataentry to OP Datastore tunnel up on dpn" + " {} for subnet {}", dpnId.toString(), subnetId.getValue()); } } catch (Exception ex) { LOG.error("Creation of SubnetOpDataEntry for subnet {} failed", subnetId.getValue(), ex); } finally { VpnUtil.unlockSubnet(lockManager, subnetId.getValue()); } } catch (Exception e) { LOG.error("Unable to handle tunnel up event for subnetId {} dpnId {}", subnetId.getValue(), dpnId.toString()); } } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") public void updateSubnetRouteOnTunnelDownEvent(Uuid subnetId, BigInteger dpnId) { LOG.info("updateSubnetRouteOnTunnelDownEvent: Subnet {} Dpn {}", subnetId.getValue(), dpnId.toString()); //TODO(vivek): Change this to use more granularized lock at subnetId level try { VpnUtil.lockSubnet(lockManager, subnetId.getValue()); try { InstanceIdentifier subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class, new SubnetOpDataEntryKey(subnetId)).build(); Optional optionalSubs = VpnUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier); if (!optionalSubs.isPresent()) { LOG.error("updateSubnetRouteOnTunnelDownEvent: SubnetOpDataEntry for subnet {} is not available", subnetId.getValue()); return; } SubnetOpDataEntry subOpEntry = null; SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get()); BigInteger nhDpnId = subOpBuilder.getNhDpnId(); if ((nhDpnId != null) && (nhDpnId.equals(dpnId))) { electNewDPNForSubNetRoute(subOpBuilder, dpnId, subnetId); subOpEntry = subOpBuilder.build(); MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier, subOpEntry); LOG.info( "updateSubnetRouteOnTunnelDownEvent: Updated subnetopdataentry to OP Datastore tunnnel down " + "on dpn {} for subnet {}", dpnId.toString(), subnetId.getValue()); } } catch (Exception ex) { LOG.error("Updation of SubnetOpDataEntry for subnet {} failed", subnetId.getValue(), ex); } finally { VpnUtil.unlockSubnet(lockManager, subnetId.getValue()); } } catch (Exception e) { LOG.error("Unable to handle tunnel down event for subnetId {} dpnId {}", subnetId.getValue(), dpnId.toString()); } } private boolean addSubnetRouteToFib(String rd, String subnetIp, BigInteger nhDpnId, String vpnName, Long elanTag, int label, Uuid subnetId) throws Exception { return addSubnetRouteToFib(rd, subnetIp, nhDpnId, vpnName, elanTag, label, subnetId, true /* BgpVpn*/, null /* networkId */); } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") private boolean addSubnetRouteToFib(String rd, String subnetIp, BigInteger nhDpnId, String vpnName, Long elanTag, int label, Uuid subnetId, boolean isBgpVpn, String networkName) throws Exception { Preconditions.checkNotNull(rd, "RouteDistinguisher cannot be null or empty!"); Preconditions.checkNotNull(subnetIp, "SubnetRouteIp cannot be null or empty!"); Preconditions.checkNotNull(vpnName, "vpnName cannot be null or empty!"); Preconditions.checkNotNull(elanTag, "elanTag cannot be null or empty!"); String nexthopIp = null; if (!isBgpVpn) { LOG.info("Adding SubnetRoute fib entry for vpnName {}, subnetIP {}, elanTag {}", vpnName, subnetIp, elanTag); vpnInterfaceManager.addSubnetRouteFibEntryToDS(rd, vpnName, subnetIp, nexthopIp, label, elanTag, nhDpnId, networkName, null /* WriteTransaction */); return true; } try { nexthopIp = InterfaceUtils.getEndpointIpAddressForDPN(dataBroker, nhDpnId); } catch (Exception e) { LOG.warn("Unable to find nexthopip for subnetroute subnetip {}", subnetIp); return false; } if (nexthopIp != null) { VpnUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, VpnUtil.getPrefixToInterfaceIdentifier(VpnUtil.getVpnId(dataBroker, vpnName), subnetIp), VpnUtil.getPrefixToInterface(nhDpnId, subnetId.getValue(), subnetIp, subnetId, true /* isNatPrefix*/)); vpnInterfaceManager.addSubnetRouteFibEntryToDS(rd, vpnName, subnetIp, nexthopIp, label, elanTag, nhDpnId, networkName, null); try { // BGP manager will handle withdraw and advertise internally if prefix // already exist bgpManager.advertisePrefix(rd, null /*macAddress*/, subnetIp, Collections.singletonList(nexthopIp), VrfEntry.EncapType.Mplsgre, label, 0 /*l3vni*/, 0 /*l2vni*/, null /*gatewayMacAddress*/); } catch (Exception e) { LOG.error("Fail: Subnet route not advertised for rd {} subnetIp {}", rd, subnetIp, e); throw e; } } else { LOG.warn("The nexthopip is empty for subnetroute subnetip {}, ignoring fib route addition", subnetIp); return false; } return true; } private int getLabel(String rd, String subnetIp) { int label = VpnUtil.getUniqueId(idManager, VpnConstants.VPN_IDPOOL_NAME, VpnUtil.getNextHopLabelKey(rd, subnetIp)); LOG.trace("Allocated subnetroute label {} for rd {} prefix {}", label, rd, subnetIp); return label; } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") private void deleteSubnetRouteFromFib(String rd, String subnetIp, String vpnName, boolean isBgpVpn) throws Exception { Preconditions.checkNotNull(rd, "RouteDistinguisher cannot be null or empty!"); Preconditions.checkNotNull(subnetIp, "SubnetRouteIp cannot be null or empty!"); vpnInterfaceManager.deleteSubnetRouteFibEntryFromDS(rd, subnetIp, vpnName); if (isBgpVpn) { try { bgpManager.withdrawPrefix(rd, subnetIp); } catch (Exception e) { LOG.error("Fail: Subnet route not withdrawn for rd {} subnetIp {}", rd, subnetIp, e); throw e; } } } // TODO Clean up the exception handling @SuppressWarnings("checkstyle:IllegalCatch") private void electNewDPNForSubNetRoute(SubnetOpDataEntryBuilder subOpBuilder, BigInteger dpnId, Uuid subnetId) { List subDpnList = null; boolean isRouteAdvertised = false; subDpnList = subOpBuilder.getSubnetToDpn(); String rd = subOpBuilder.getVrfId(); String subnetIp = subOpBuilder.getSubnetCidr(); String vpnName = subOpBuilder.getVpnName(); long elanTag = subOpBuilder.getElanTag(); BigInteger nhDpnId = null; boolean isAlternateDpnSelected = false; Iterator subNetIt = subDpnList.iterator(); int label = getLabel(rd, subnetIp); while (subNetIt.hasNext()) { SubnetToDpn subnetToDpn = subNetIt.next(); nhDpnId = subnetToDpn.getDpnId(); if (!nhDpnId.equals(dpnId)) { try { //update the VRF entry for the subnetroute. isRouteAdvertised = addSubnetRouteToFib(rd, subnetIp, nhDpnId, vpnName, elanTag, label, subnetId); if (isRouteAdvertised) { subOpBuilder.setRouteAdvState(TaskState.Done); subOpBuilder.setNhDpnId(nhDpnId); isAlternateDpnSelected = true; break; } } catch (Exception ex) { LOG.error( "electNewDPNForSubNetRoute: Swapping and trying to configure NextHopDPN {} for subnet {} " + "failed ex {}", dpnId.toString(), subnetId.getValue(), ex); subOpBuilder.setRouteAdvState(TaskState.Na); } } } //If no alternate Dpn is selected as nextHopDpn ,withdraw the subnetroute. if (!isAlternateDpnSelected) { LOG.info("No alternate DPN available for subnet {}.Prefix withdrawn from BGP", subnetIp); try { // Withdraw route from BGP for this subnet deleteSubnetRouteFromFib(rd, subnetIp, vpnName, true /* isBgpVpn*/); subOpBuilder.setNhDpnId(null); subOpBuilder.setRouteAdvState(TaskState.Na); } catch (Exception ex) { LOG.error( "electNewDPNForSubNetRoute: Withdrawing NextHopDPN " + dpnId.toString() + " information for subnet " + subnetId.getValue() + " from BGP failed {}" + ex); subOpBuilder.setRouteAdvState(TaskState.Pending); } } } }