vpnmanager/impl/src/main/java/org/opendaylight/netvirt/vpnmanager/VpnSubnetRouteHandler.java

   1 /*
   2  * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.netvirt.vpnmanager;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Preconditions;
  12 import java.math.BigInteger;
  13 import java.util.ArrayList;
  14 import java.util.Arrays;
  15 import java.util.Collections;
  16 import java.util.HashMap;
  17 import java.util.List;
  18 import java.util.Map;
  19 import java.util.Objects;
  20 import javax.inject.Inject;
  21 import javax.inject.Singleton;
  22 import org.eclipse.jdt.annotation.Nullable;
  23 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  24 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  25 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  26 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  27 import org.opendaylight.genius.datastoreutils.SingleTransactionDataBroker;
  28 import org.opendaylight.netvirt.bgpmanager.api.IBgpManager;
  29 import org.opendaylight.netvirt.fibmanager.api.IFibManager;
  30 import org.opendaylight.netvirt.fibmanager.api.RouteOrigin;
  31 import org.opendaylight.netvirt.vpnmanager.VpnOpDataSyncer.VpnOpDataType;
  32 import org.opendaylight.netvirt.vpnmanager.api.InterfaceUtils;
  33 import org.opendaylight.netvirt.vpnmanager.populator.input.L3vpnInput;
  34 import org.opendaylight.netvirt.vpnmanager.populator.intfc.VpnPopulator;
  35 import org.opendaylight.netvirt.vpnmanager.populator.registry.L3vpnRegistry;
  36 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface;
  37 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface.OperStatus;
  38 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.vrfentries.VrfEntry;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.PortOpData;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.SubnetOpData;
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.TaskState;
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.port.op.data.PortOpDataEntry;
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.port.op.data.PortOpDataEntryKey;
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.prefix.to._interface.vpn.ids.Prefixes;
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.subnet.op.data.SubnetOpDataEntry;
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.subnet.op.data.SubnetOpDataEntryBuilder;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.subnet.op.data.SubnetOpDataEntryKey;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.subnet.op.data.subnet.op.data.entry.SubnetToDpn;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.VpnInstanceOpDataEntry;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ExternalNetworks;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.external.networks.Networks;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.external.networks.NetworksKey;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.Subnetmaps;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.subnetmaps.Subnetmap;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.rev150602.subnetmaps.SubnetmapKey;
  57 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  58 import org.slf4j.Logger;
  59 import org.slf4j.LoggerFactory;
  60
  61 @Singleton
  62 public class VpnSubnetRouteHandler {
  63     private static final Logger LOG = LoggerFactory.getLogger(VpnSubnetRouteHandler.class);
  64     private static final String LOGGING_PREFIX = "SUBNETROUTE:";
  65     private final DataBroker dataBroker;
  66     private final SubnetOpDpnManager subOpDpnManager;
  67     private final IBgpManager bgpManager;
  68     private final VpnOpDataSyncer vpnOpDataSyncer;
  69     private final VpnNodeListener vpnNodeListener;
  70     private final IFibManager fibManager;
  71     private final VpnUtil vpnUtil;
  72
  73     @Inject
  74     public VpnSubnetRouteHandler(final DataBroker dataBroker, final SubnetOpDpnManager subnetOpDpnManager,
  75             final IBgpManager bgpManager, final VpnOpDataSyncer vpnOpDataSyncer, final VpnNodeListener vpnNodeListener,
  76             final IFibManager fibManager, VpnUtil vpnUtil) {
  77         this.dataBroker = dataBroker;
  78         this.subOpDpnManager = subnetOpDpnManager;
  79         this.bgpManager = bgpManager;
  80         this.vpnOpDataSyncer = vpnOpDataSyncer;
  81         this.vpnNodeListener = vpnNodeListener;
  82         this.fibManager = fibManager;
  83         this.vpnUtil = vpnUtil;
  84     }
  85
  86     // TODO Clean up the exception handling
  87     @SuppressWarnings("checkstyle:IllegalCatch")
  88     public void onSubnetAddedToVpn(Subnetmap subnetmap, boolean isBgpVpn, Long elanTag) {
  89         Uuid subnetId = subnetmap.getId();
  90         String subnetIp = subnetmap.getSubnetIp();
  91         Subnetmap subMap = null;
  92         SubnetOpDataEntry subOpEntry = null;
  93         SubnetOpDataEntryBuilder subOpBuilder = null;
  94         InstanceIdentifier<SubnetOpDataEntry> subOpIdentifier = null;
  95         Optional<SubnetOpDataEntry> optionalSubs = null;
  96
  97         Preconditions.checkNotNull(subnetId, LOGGING_PREFIX + " onSubnetAddedToVpn: SubnetId cannot be null or empty!");
  98         Preconditions.checkNotNull(subnetIp,
  99                 LOGGING_PREFIX + " onSubnetAddedToVpn: SubnetPrefix cannot be null or empty!");
 100         Preconditions.checkNotNull(elanTag, LOGGING_PREFIX + " onSubnetAddedToVpn: ElanTag cannot be null or empty!");
 101
 102         if (subnetmap.getVpnId() == null) {
 103             LOG.error("onSubnetAddedToVpn: VpnId {} for subnet {} not found, bailing out", subnetmap.getVpnId(),
 104                     subnetId);
 105             return;
 106         }
 107         String vpnName = subnetmap.getVpnId().getValue();
 108         long vpnId = waitAndGetVpnIdIfInvalid(vpnName);
 109         if (vpnId == VpnConstants.INVALID_ID) {
 110             LOG.error(
 111                     "{} onSubnetAddedToVpn: VpnInstance to VPNId mapping not yet available for VpnName {} "
 112                             + "processing subnet {} with IP {}, bailing out now.",
 113                     LOGGING_PREFIX, vpnName, subnetId, subnetIp);
 114             return;
 115         }
 116
 117         String primaryRd = vpnUtil.getPrimaryRd(vpnName);
 118         VpnInstanceOpDataEntry vpnInstanceOpData = waitAndGetVpnInstanceOpDataIfNull(vpnName, primaryRd);
 119         if (vpnInstanceOpData == null) {
 120             LOG.error(
 121                     "{} onSubnetAddedToVpn: VpnInstanceOpData not yet available for VpnName {} "
 122                             + "processing subnet {} with IP {}, bailing out now.",
 123                     LOGGING_PREFIX, vpnName, subnetId, subnetIp);
 124             return;
 125         }
 126         LOG.info("{} onSubnetAddedToVpn: Subnet {} with IP {} being added to vpn {}", LOGGING_PREFIX,
 127                 subnetId.getValue(), subnetIp, vpnName);
 128         //TODO(vivek): Change this to use more granularized lock at subnetId level
 129         try {
 130             vpnUtil.lockSubnet(subnetId.getValue());
 131             // Please check if subnetId belongs to an External Network
 132             InstanceIdentifier<Subnetmap> subMapid =
 133                     InstanceIdentifier.builder(Subnetmaps.class).child(Subnetmap.class,
 134                             new SubnetmapKey(subnetId)).build();
 135             Optional<Subnetmap> sm = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 136                     LogicalDatastoreType.CONFIGURATION, subMapid);
 137             if (!sm.isPresent()) {
 138                 LOG.error("{} onSubnetAddedToVpn: Unable to retrieve subnetmap entry for subnet {} IP {}"
 139                         + " vpnName {}", LOGGING_PREFIX, subnetId, subnetIp, vpnName);
 140                 return;
 141             }
 142             subMap = sm.get();
 143
 144             if (isBgpVpn) {
 145                 InstanceIdentifier<Networks> netsIdentifier = InstanceIdentifier.builder(ExternalNetworks.class)
 146                         .child(Networks.class, new NetworksKey(subMap.getNetworkId())).build();
 147                 Optional<Networks> optionalNets = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 148                         LogicalDatastoreType.CONFIGURATION, netsIdentifier);
 149                 if (optionalNets.isPresent()) {
 150                     LOG.info("{} onSubnetAddedToVpn: subnet {} with IP {} is an external subnet on external "
 151                                     + "network {}, so ignoring this for SubnetRoute on vpn {}", LOGGING_PREFIX,
 152                             subnetId.getValue(), subnetIp, subMap.getNetworkId().getValue(), vpnName);
 153                     return;
 154                 }
 155             }
 156             //Create and add SubnetOpDataEntry object for this subnet to the SubnetOpData container
 157             subOpIdentifier = InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class,
 158                     new SubnetOpDataEntryKey(subnetId)).build();
 159             optionalSubs = SingleTransactionDataBroker.syncReadOptional(dataBroker, LogicalDatastoreType.OPERATIONAL,
 160                     subOpIdentifier);
 161             if (optionalSubs.isPresent()) {
 162                 LOG.error("{} onSubnetAddedToVpn: SubnetOpDataEntry for subnet {} with ip {} and vpn {} already"
 163                         + " detected to be present", LOGGING_PREFIX, subnetId.getValue(), subnetIp, vpnName);
 164                 return;
 165             }
 166             LOG.debug("{} onSubnetAddedToVpn: Creating new SubnetOpDataEntry node for subnet {} subnetIp {} "
 167                     + "vpn {}", LOGGING_PREFIX, subnetId.getValue(), subnetIp, vpnName);
 168             subOpBuilder = new SubnetOpDataEntryBuilder().withKey(new SubnetOpDataEntryKey(subnetId));
 169             subOpBuilder.setSubnetId(subnetId);
 170             subOpBuilder.setSubnetCidr(subnetIp);
 171
 172             if (isBgpVpn && !VpnUtil.isBgpVpn(vpnName, primaryRd)) {
 173                 LOG.error("{} onSubnetAddedToVpn: The VPN Instance name {} does not have RD. Bailing out for"
 174                         + " subnet {} subnetIp {} ", LOGGING_PREFIX, vpnName, subnetId.getValue(), subnetIp);
 175                 return;
 176             }
 177             subOpBuilder.setVrfId(primaryRd);
 178             subOpBuilder.setVpnName(vpnName);
 179             subOpBuilder.setSubnetToDpn(new ArrayList<>());
 180             subOpBuilder.setRouteAdvState(TaskState.Idle);
 181             subOpBuilder.setElanTag(elanTag);
 182             Long l3Vni = vpnInstanceOpData.getL3vni();
 183             subOpBuilder.setL3vni(l3Vni);
 184             subOpEntry = subOpBuilder.build();
 185             SingleTransactionDataBroker.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier,
 186                     subOpEntry, VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 187             LOG.info("{} onSubnetAddedToVpn: Added subnetopdataentry to OP Datastore for subnet {}", LOGGING_PREFIX,
 188                     subnetId.getValue());
 189         } catch (TransactionCommitFailedException e) {
 190             LOG.error("{} Creation of SubnetOpDataEntry for subnet {} failed ", LOGGING_PREFIX,
 191                     subnetId.getValue(), e);
 192             // The second part of this method depends on subMap being non-null so fail fast here.
 193             return;
 194         } catch (RuntimeException e) { //TODO: Avoid this
 195             LOG.error("{} onSubnetAddedToVpn: Unable to handle subnet {} with ip {} added to vpn {}", LOGGING_PREFIX,
 196                     subnetId.getValue(), subnetIp, vpnName, e);
 197             return;
 198         } catch (ReadFailedException e) {
 199             LOG.error("{} onSubnetAddedToVpn: Failed to read data store for subnet {} ip {} vpn {}", LOGGING_PREFIX,
 200                     subnetId, subnetIp, vpnName);
 201             return;
 202         } finally {
 203             vpnUtil.unlockSubnet(subnetId.getValue());
 204         }
 205         try {
 206             //In second critical section , Port-Op-Data will be updated.
 207             vpnUtil.lockSubnet(subnetId.getValue());
 208             BigInteger dpnId = null;
 209             SubnetToDpn subDpn = null;
 210             Map<BigInteger, SubnetToDpn> subDpnMap = new HashMap<>();
 211
 212             optionalSubs = SingleTransactionDataBroker.syncReadOptional(dataBroker, LogicalDatastoreType.OPERATIONAL,
 213                     subOpIdentifier);
 214             subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get())
 215                     .withKey(new SubnetOpDataEntryKey(subnetId));
 216             List<Uuid> portList = subMap.getPortList();
 217             if (portList != null) {
 218                 for (Uuid port : portList) {
 219                     Interface intfState = InterfaceUtils.getInterfaceStateFromOperDS(dataBroker,port.getValue());
 220                     if (intfState != null) {
 221                         try {
 222                             dpnId = InterfaceUtils.getDpIdFromInterface(intfState);
 223                         } catch (Exception e) {
 224                             LOG.error("{} onSubnetAddedToVpn: Unable to obtain dpnId for interface {},"
 225                                             + " subnetroute inclusion for this interface for subnet {} subnetIp {} "
 226                                     + "vpn {} failed with exception", LOGGING_PREFIX, port.getValue(),
 227                                     subnetId.getValue(), subnetIp, vpnName, e);
 228                             continue;
 229                         }
 230                         if (dpnId.equals(BigInteger.ZERO)) {
 231                             LOG.error("{} onSubnetAddedToVpn: Port {} is not assigned DPN yet,"
 232                                             + " ignoring subnet {} subnetIP {} vpn {}", LOGGING_PREFIX, port.getValue(),
 233                                     subnetId.getValue(), subnetIp, vpnName);
 234                             continue;
 235                         }
 236                         subOpDpnManager.addPortOpDataEntry(port.getValue(), subnetId, dpnId);
 237                         if (intfState.getOperStatus() != OperStatus.Up) {
 238                             LOG.error("{} onSubnetAddedToVpn: Port {} is not UP yet, ignoring subnet {}"
 239                                             + " subnetIp {} vpn {}", LOGGING_PREFIX, port.getValue(),
 240                                     subnetId.getValue(), subnetIp, vpnName);
 241                             continue;
 242                         }
 243                         subDpn = subOpDpnManager.addInterfaceToDpn(subnetId, dpnId, port.getValue());
 244                         if (intfState.getOperStatus() == OperStatus.Up) {
 245                             // port is UP
 246                             subDpnMap.put(dpnId, subDpn);
 247                         }
 248                     } else {
 249                         subOpDpnManager.addPortOpDataEntry(port.getValue(), subnetId, null);
 250                     }
 251                 }
 252                 if (subDpnMap.size() > 0) {
 253                     subOpBuilder.setSubnetToDpn(new ArrayList<>(subDpnMap.values()));
 254                 }
 255             }
 256             electNewDpnForSubnetRoute(subOpBuilder, null /* oldDpnId */, subnetId,
 257                     subMap.getNetworkId(), isBgpVpn);
 258             subOpEntry = subOpBuilder.build();
 259             SingleTransactionDataBroker.syncUpdate(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier,
 260                     subOpEntry, VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 261             LOG.info("{} onSubnetAddedToVpn: Added PortOpDataEntry and VpnInterfaces to SubnetOpData"
 262                             + " for subnet {} subnetIp {} vpn {} TaskState {} lastTaskState {}", LOGGING_PREFIX,
 263                     subnetId.getValue(), subnetIp, vpnName, subOpEntry.getRouteAdvState(),
 264                     subOpEntry.getLastAdvState());
 265         } catch (RuntimeException e) {
 266             LOG.error("{} onSubnetAddedToVpn: Unable to handle subnet {} with ip {} added to vpn {}", LOGGING_PREFIX,
 267                     subnetId.getValue(), subnetIp, vpnName, e);
 268         } catch (ReadFailedException e) {
 269             LOG.error("{} onSubnetAddedToVpn: Failed to read data store for subnet {} ip {} vpn {}", LOGGING_PREFIX,
 270                     subnetId, subnetIp, vpnName);
 271         } catch (TransactionCommitFailedException ex) {
 272             LOG.error("{} onSubnetAddedToVpn: Creation of SubnetOpDataEntry for subnet {} subnetIp {} vpn {} failed",
 273                     LOGGING_PREFIX, subnetId.getValue(), subnetIp, vpnName, ex);
 274         } finally {
 275             vpnUtil.unlockSubnet(subnetId.getValue());
 276         }
 277     }
 278
 279     private long waitAndGetVpnIdIfInvalid(String vpnName) {
 280         long vpnId = vpnUtil.getVpnId(vpnName);
 281         if (vpnId == VpnConstants.INVALID_ID) {
 282             LOG.debug("VpnId is invalid, waiting to fetch again: vpnName={}, vpnId={}", vpnName, vpnId);
 283             vpnOpDataSyncer.waitForVpnDataReady(VpnOpDataType.vpnInstanceToId, vpnName,
 284                     VpnConstants.PER_VPN_INSTANCE_MAX_WAIT_TIME_IN_MILLISECONDS);
 285             vpnId = vpnUtil.getVpnId(vpnName);
 286         }
 287         return vpnId;
 288     }
 289
 290     private VpnInstanceOpDataEntry waitAndGetVpnInstanceOpDataIfNull(String vpnName, String primaryRd) {
 291         VpnInstanceOpDataEntry vpnInstanceOpData = vpnUtil.getVpnInstanceOpData(primaryRd);
 292         if (vpnInstanceOpData == null) {
 293             LOG.debug("vpnInstanceOpData is null, waiting to fetch again: vpnName={}", vpnName);
 294             vpnOpDataSyncer.waitForVpnDataReady(VpnOpDataType.vpnOpData, vpnName,
 295                     VpnConstants.PER_VPN_INSTANCE_OPDATA_MAX_WAIT_TIME_IN_MILLISECONDS);
 296             vpnInstanceOpData = vpnUtil.getVpnInstanceOpData(primaryRd);
 297         }
 298         return vpnInstanceOpData;
 299     }
 300
 301     // TODO Clean up the exception handling
 302     @SuppressWarnings("checkstyle:IllegalCatch")
 303     public void onSubnetDeletedFromVpn(Subnetmap subnetmap, boolean isBgpVpn) {
 304         Uuid subnetId = subnetmap.getId();
 305         LOG.info("{} onSubnetDeletedFromVpn: Subnet {} with ip {} being removed from vpnId {}", LOGGING_PREFIX,
 306                 subnetId, subnetmap.getSubnetIp(), subnetmap.getVpnId());
 307         //TODO(vivek): Change this to use more granularized lock at subnetId level
 308         try {
 309             vpnUtil.lockSubnet(subnetId.getValue());
 310             InstanceIdentifier<SubnetOpDataEntry> subOpIdentifier =
 311                     InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class,
 312                             new SubnetOpDataEntryKey(subnetId)).build();
 313             Optional<SubnetOpDataEntry> optionalSubs = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 314                     LogicalDatastoreType.OPERATIONAL,
 315                     subOpIdentifier);
 316             if (!optionalSubs.isPresent()) {
 317                 LOG.error("{} onSubnetDeletedFromVpn: SubnetOpDataEntry for subnet {} subnetIp {} vpn {}"
 318                                 + " not available in datastore", LOGGING_PREFIX, subnetId.getValue(),
 319                         subnetId.getValue(), subnetmap.getVpnId());
 320                 return;
 321             }
 322             LOG.trace("{} onSubnetDeletedFromVpn: Removing the SubnetOpDataEntry node for subnet {} subnetIp {}"
 323                             + " vpnName {} rd {} TaskState {}", LOGGING_PREFIX, subnetId.getValue(),
 324                     optionalSubs.get().getSubnetCidr(), optionalSubs.get().getVpnName(),
 325                     optionalSubs.get().getVrfId(), optionalSubs.get().getRouteAdvState());
 326                 /* If subnet is deleted (or if its removed from VPN), the ports that are DOWN on that subnet
 327                  * will continue to be stale in portOpData DS, as subDpnList used for portOpData removal will
 328                  * contain only ports that are UP. So here we explicitly cleanup the ports of the subnet by
 329                  * going through the list of ports on the subnet
 330                  */
 331             InstanceIdentifier<Subnetmap> subMapid =
 332                     InstanceIdentifier.builder(Subnetmaps.class).child(Subnetmap.class,
 333                             new SubnetmapKey(subnetId)).build();
 334             Optional<Subnetmap> sm = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 335                     LogicalDatastoreType.CONFIGURATION, subMapid);
 336             if (!sm.isPresent()) {
 337                 LOG.error("{} onSubnetDeletedFromVpn: Stale ports removal: Unable to retrieve subnetmap entry"
 338                                 + " for subnet {} subnetIp {} vpnName {}", LOGGING_PREFIX, subnetId.getValue(),
 339                         optionalSubs.get().getSubnetCidr(), optionalSubs.get().getVpnName());
 340             } else {
 341                 Subnetmap subMap = sm.get();
 342                 List<Uuid> portList = subMap.getPortList();
 343                 if (portList != null) {
 344                     for (Uuid port : portList) {
 345                         InstanceIdentifier<PortOpDataEntry> portOpIdentifier =
 346                                 InstanceIdentifier.builder(PortOpData.class).child(PortOpDataEntry.class,
 347                                         new PortOpDataEntryKey(port.getValue())).build();
 348                         LOG.trace("{} onSubnetDeletedFromVpn: Deleting portOpData entry for port {}"
 349                                         + " from subnet {} subnetIp {} vpnName {} TaskState {}",
 350                                 LOGGING_PREFIX, port.getValue(), subnetId.getValue(),
 351                                 optionalSubs.get().getSubnetCidr(), optionalSubs.get().getVpnName(),
 352                                 optionalSubs.get().getRouteAdvState());
 353                         SingleTransactionDataBroker.syncDelete(dataBroker, LogicalDatastoreType.OPERATIONAL,
 354                                 portOpIdentifier, VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 355                     }
 356                 }
 357             }
 358
 359             SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get());
 360             String rd = subOpBuilder.getVrfId();
 361             String subnetIp = subOpBuilder.getSubnetCidr();
 362             String vpnName = subOpBuilder.getVpnName();
 363             //Withdraw the routes for all the interfaces on this subnet
 364             //Remove subnet route entry from FIB
 365             deleteSubnetRouteFromFib(rd, subnetIp, vpnName, isBgpVpn);
 366             SingleTransactionDataBroker.syncDelete(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier,
 367                     VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 368             LOG.info("{} onSubnetDeletedFromVpn: Removed subnetopdataentry successfully from Datastore"
 369                             + " for subnet {} subnetIp {} vpnName {} rd {}", LOGGING_PREFIX, subnetId.getValue(),
 370                     subnetIp, vpnName, rd);
 371         } catch (RuntimeException e) { //TODO: Avoid this
 372             LOG.error("{} onSubnetDeletedFromVpn: Unable to handle subnet {} with Ip {} removed from vpn {}",
 373                     LOGGING_PREFIX, subnetId.getValue(), subnetmap.getSubnetIp(), subnetmap.getVpnId(), e);
 374         } catch (TransactionCommitFailedException ex) {
 375             LOG.error("{} onSubnetDeletedFromVpn: Removal of SubnetOpDataEntry for subnet {} subnetIp {}"
 376                             + " vpnId {} failed", LOGGING_PREFIX, subnetId.getValue(), subnetmap.getSubnetIp(),
 377                     subnetmap.getVpnId(), ex);
 378         } catch (ReadFailedException e) {
 379             LOG.error("{} onSubnetDeletedFromVpn: Failed to read data store for subnet {} ip {} vpn {}",
 380                     LOGGING_PREFIX, subnetId, subnetmap.getSubnetIp(), subnetmap.getVpnId());
 381         } finally {
 382             vpnUtil.unlockSubnet(subnetId.getValue());
 383         }
 384     }
 385
 386     public void onSubnetUpdatedInVpn(Subnetmap subnetmap, Long elanTag) {
 387         Uuid subnetId = subnetmap.getId();
 388         String vpnName = subnetmap.getVpnId().getValue();
 389         String subnetIp = subnetmap.getSubnetIp();
 390
 391         Preconditions.checkNotNull(subnetId,
 392                 LOGGING_PREFIX + " onSubnetUpdatedInVpn: SubnetId cannot be null or empty!");
 393         Preconditions.checkNotNull(subnetIp,
 394                 LOGGING_PREFIX + " onSubnetUpdatedInVpn: SubnetPrefix cannot be null or empty!");
 395         Preconditions.checkNotNull(vpnName, LOGGING_PREFIX + " onSubnetUpdatedInVpn: VpnName cannot be null or empty!");
 396         Preconditions.checkNotNull(elanTag, LOGGING_PREFIX + " onSubnetUpdatedInVpn: ElanTag cannot be null or empty!");
 397         try {
 398             InstanceIdentifier<SubnetOpDataEntry> subOpIdentifier =
 399                     InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class,
 400                             new SubnetOpDataEntryKey(subnetId)).build();
 401             Optional<SubnetOpDataEntry> optionalSubs =
 402                     SingleTransactionDataBroker.syncReadOptional(dataBroker, LogicalDatastoreType.OPERATIONAL,
 403                             subOpIdentifier);
 404             if (optionalSubs.isPresent()) {
 405                 onSubnetDeletedFromVpn(subnetmap, true);
 406             } else {
 407                 onSubnetAddedToVpn(subnetmap, true, elanTag);
 408             }
 409             LOG.info("{} onSubnetUpdatedInVpn: subnet {} with Ip {} updated successfully for vpn {}", LOGGING_PREFIX,
 410                     subnetId.getValue(), subnetIp, vpnName);
 411         } catch (ReadFailedException e) {
 412             LOG.error("onSubnetUpdatedInVpn: Failed to read data store for subnet{} ip {} elanTag {} vpn {}",subnetId,
 413                     subnetIp, elanTag, vpnName);
 414         }
 415     }
 416
 417     // TODO Clean up the exception handling
 418     @SuppressWarnings("checkstyle:IllegalCatch")
 419     public void onPortAddedToSubnet(Subnetmap subnetmap, Uuid portId) {
 420         Uuid subnetId = subnetmap.getId();
 421         LOG.info("{} onPortAddedToSubnet: Port {} being added to subnet {}", LOGGING_PREFIX, portId.getValue(),
 422                 subnetId.getValue());
 423         //TODO(vivek): Change this to use more granularized lock at subnetId level
 424         try {
 425             vpnUtil.lockSubnet(subnetId.getValue());
 426             InstanceIdentifier<SubnetOpDataEntry> subOpIdentifier =
 427                     InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class,
 428                             new SubnetOpDataEntryKey(subnetId)).build();
 429
 430             Optional<SubnetOpDataEntry> optionalSubs = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 431                     LogicalDatastoreType.OPERATIONAL, subOpIdentifier);
 432             if (!optionalSubs.isPresent()) {
 433                 LOG.info("{} onPortAddedToSubnet: Port {} is part of a subnet {} that is not in VPN, ignoring",
 434                         LOGGING_PREFIX, portId.getValue(), subnetId.getValue());
 435                 return;
 436             }
 437             String vpnName = optionalSubs.get().getVpnName();
 438             String subnetIp = optionalSubs.get().getSubnetCidr();
 439             String rd = optionalSubs.get().getVrfId();
 440             String routeAdvState = optionalSubs.get().getRouteAdvState().toString();
 441             LOG.info("{} onPortAddedToSubnet: Port {} being added to subnet {} subnetIp {} vpnName {} rd {} "
 442                             + "TaskState {}", LOGGING_PREFIX, portId.getValue(), subnetId.getValue(), subnetIp,
 443                     vpnName, rd, routeAdvState);
 444             subOpDpnManager.addPortOpDataEntry(portId.getValue(), subnetId, null);
 445             Interface intfState = InterfaceUtils.getInterfaceStateFromOperDS(dataBroker,portId.getValue());
 446             if (intfState == null) {
 447                 // Interface State not yet available
 448                 return;
 449             }
 450             final BigInteger dpnId;
 451             try {
 452                 dpnId = InterfaceUtils.getDpIdFromInterface(intfState);
 453             } catch (Exception e) {
 454                 LOG.error("{} onPortAddedToSubnet: Unable to obtain dpnId for interface {}. subnetroute inclusion"
 455                                 + " for this interface failed for subnet {} subnetIp {} vpn {} rd {}",
 456                         LOGGING_PREFIX, portId.getValue(), subnetId.getValue(), subnetIp, vpnName, rd, e);
 457                 return;
 458             }
 459             if (dpnId.equals(BigInteger.ZERO)) {
 460                 LOG.error("{} onPortAddedToSubnet: Port {} is not assigned DPN yet, ignoring subnetRoute "
 461                                 + "inclusion for the interface into subnet {} subnetIp {} vpnName {} rd {}",
 462                         LOGGING_PREFIX, portId.getValue(), subnetId.getValue(), subnetIp, vpnName, rd);
 463                 return;
 464             }
 465             subOpDpnManager.addPortOpDataEntry(portId.getValue(), subnetId, dpnId);
 466             if (intfState.getOperStatus() != OperStatus.Up) {
 467                 LOG.error("{} onPortAddedToSubnet: Port {} is not UP yet, ignoring subnetRoute inclusion for "
 468                                 + "the interface into subnet {} subnetIp {} vpnName {} rd {}", LOGGING_PREFIX,
 469                         portId.getValue(), subnetId.getValue(), subnetIp, vpnName, rd);
 470                 return;
 471             }
 472             LOG.debug("{} onPortAddedToSubnet: Port {} added. Updating the SubnetOpDataEntry node for subnet {} "
 473                             + "subnetIp {} vpnName {} rd {} TaskState {}", LOGGING_PREFIX, portId.getValue(),
 474                     subnetId.getValue(), subnetIp, vpnName, rd, routeAdvState);
 475             SubnetToDpn subDpn = subOpDpnManager.addInterfaceToDpn(subnetId, dpnId, portId.getValue());
 476             if (subDpn == null) {
 477                 LOG.error("{} onPortAddedToSubnet: subnet-to-dpn list is null for subnetId {}. portId {}, "
 478                                 + "vpnName {}, rd {}, subnetIp {}", LOGGING_PREFIX, subnetId.getValue(),
 479                         portId.getValue(), vpnName, rd, subnetIp);
 480                 return;
 481             }
 482             SubnetOpDataEntry subnetOpDataEntry = optionalSubs.get();
 483             SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(subnetOpDataEntry);
 484             List<SubnetToDpn> subDpnList = subOpBuilder.getSubnetToDpn();
 485             subDpnList.add(subDpn);
 486             subOpBuilder.setSubnetToDpn(subDpnList);
 487             if (subOpBuilder.getRouteAdvState() != TaskState.Advertised) {
 488                 if (subOpBuilder.getNhDpnId() == null) {
 489                     // No nexthop selected yet, elect one now
 490                     electNewDpnForSubnetRoute(subOpBuilder, null /* oldDpnId */, subnetId,
 491                             subnetmap.getNetworkId(), true);
 492                 } else if (!VpnUtil.isExternalSubnetVpn(subnetOpDataEntry.getVpnName(), subnetId.getValue())) {
 493                     // Already nexthop has been selected, only publishing to bgp required, so publish to bgp
 494                     getNexthopTepAndPublishRoute(subOpBuilder, subnetId);
 495                 }
 496             }
 497             SubnetOpDataEntry subOpEntry = subOpBuilder.build();
 498             SingleTransactionDataBroker.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier,
 499                     subOpEntry, VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 500             LOG.info("{} onPortAddedToSubnet: Updated subnetopdataentry to OP Datastore for port {} subnet {}"
 501                             + " subnetIp {} vpnName {} rd {} TaskState {} lastTaskState {}", LOGGING_PREFIX,
 502                     portId.getValue(), subnetId.getValue(), subOpEntry.getSubnetCidr(), subOpEntry.getVpnName(),
 503                     subOpBuilder.getVrfId(), subOpEntry.getRouteAdvState(), subOpEntry.getLastAdvState());
 504         } catch (RuntimeException e) { //TODO: Avoid this
 505             LOG.error("{} onPortAddedToSubnet: Unable to handle port {} added to subnet {}", LOGGING_PREFIX,
 506                     portId.getValue(), subnetId.getValue(), e);
 507         } catch (ReadFailedException e) {
 508             LOG.error("{} onPortAddedToSubnet: Failed to read data store for port {} subnet {}", LOGGING_PREFIX,
 509                     portId, subnetId);
 510         } catch (TransactionCommitFailedException e) {
 511             LOG.error("{} onPortAddedToSubnet: Updation of subnetOpEntry for port {} subnet {} falied",
 512                     LOGGING_PREFIX, portId.getValue(), subnetId.getValue(), e);
 513         } finally {
 514             vpnUtil.unlockSubnet(subnetId.getValue());
 515         }
 516     }
 517
 518     // TODO Clean up the exception handling
 519     @SuppressWarnings("checkstyle:IllegalCatch")
 520     public void onPortRemovedFromSubnet(Subnetmap subnetmap, Uuid portId) {
 521         Uuid subnetId = subnetmap.getId();
 522         //TODO(vivek): Change this to use more granularized lock at subnetId level
 523         try {
 524             vpnUtil.lockSubnet(subnetId.getValue());
 525             PortOpDataEntry portOpEntry = subOpDpnManager.removePortOpDataEntry(portId.getValue(),
 526                     subnetmap.getId());
 527             if (portOpEntry == null) {
 528                 return;
 529             }
 530             BigInteger dpnId = portOpEntry.getDpnId();
 531             if (dpnId == null) {
 532                 LOG.error("{} onPortRemovedFromSubnet:  Port {} does not have a DPNId associated,"
 533                                 + " ignoring removal from subnet {}", LOGGING_PREFIX, portId.getValue(),
 534                         subnetId.getValue());
 535                 return;
 536             }
 537             boolean last = subOpDpnManager.removeInterfaceFromDpn(subnetId, dpnId, portId.getValue());
 538             InstanceIdentifier<SubnetOpDataEntry> subOpIdentifier =
 539                     InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class,
 540                             new SubnetOpDataEntryKey(subnetId)).build();
 541             Optional<SubnetOpDataEntry> optionalSubs = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 542                     LogicalDatastoreType.OPERATIONAL, subOpIdentifier);
 543             if (!optionalSubs.isPresent()) {
 544                 LOG.info("{} onPortRemovedFromSubnet: Port {} is part of a subnet {} that is not in VPN,"
 545                         + " ignoring", LOGGING_PREFIX, portId.getValue(), subnetId.getValue());
 546                 return;
 547             }
 548             LOG.info("{} onPortRemovedFromSubnet: Port {} being removed. Updating the SubnetOpDataEntry"
 549                             + " for subnet {} subnetIp {} vpnName {} rd {} TaskState {} lastTaskState {}",
 550                     LOGGING_PREFIX, portId.getValue(), subnetId.getValue(), optionalSubs.get().getSubnetCidr(),
 551                     optionalSubs.get().getVpnName(), optionalSubs.get().getVrfId(),
 552                     optionalSubs.get().getRouteAdvState(), optionalSubs.get().getLastAdvState());
 553             SubnetOpDataEntry subnetOpDataEntry = optionalSubs.get();
 554             SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(subnetOpDataEntry);
 555             BigInteger nhDpnId = subOpBuilder.getNhDpnId();
 556             if (nhDpnId != null && nhDpnId.equals(dpnId)) {
 557                 // select another NhDpnId
 558                 if (last) {
 559                     LOG.debug("{} onPortRemovedFromSubnet: Last port {} being removed from subnet {} subnetIp {}"
 560                                     + " vpnName {} rd {}", LOGGING_PREFIX, portId.getValue(), subnetId.getValue(),
 561                             subOpBuilder.getSubnetCidr(), subOpBuilder.getVpnName(), subOpBuilder.getVrfId());
 562                     // last port on this DPN, so we need to elect the new NHDpnId
 563                     electNewDpnForSubnetRoute(subOpBuilder, nhDpnId, subnetId, subnetmap.getNetworkId(),
 564                             !VpnUtil.isExternalSubnetVpn(subnetOpDataEntry.getVpnName(), subnetId.getValue()));
 565                     SingleTransactionDataBroker.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL,
 566                             subOpIdentifier, subOpBuilder.build(), VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 567                     LOG.info("{} onPortRemovedFromSubnet: Updated subnetopdataentry to OP Datastore"
 568                                     + " removing port {} from subnet {} subnetIp {} vpnName {} rd {}", LOGGING_PREFIX,
 569                             portId.getValue(), subnetId.getValue(), subOpBuilder.getSubnetCidr(),
 570                             subOpBuilder.getVpnName(), subOpBuilder.getVrfId());
 571                 }
 572             }
 573         } catch (RuntimeException e) {
 574             LOG.error("{} onPortRemovedFromSubnet: Unable to handle port {} removed from subnet {}", LOGGING_PREFIX,
 575                     portId.getValue(), subnetId.getValue(), e);
 576         } catch (ReadFailedException e) {
 577             LOG.error("{} onPortRemovedFromSubnet: Failed to read data store for port {} subnet {}", LOGGING_PREFIX,
 578                     portId, subnetId);
 579         } catch (TransactionCommitFailedException e) {
 580             LOG.error("{} onPortRemovedFromSubnet: Removal of portOp for {} from subnet {} failed", LOGGING_PREFIX,
 581                     portId.getValue(), subnetId.getValue(), e);
 582         } finally {
 583             vpnUtil.unlockSubnet(subnetId.getValue());
 584         }
 585     }
 586
 587     // TODO Clean up the exception handling
 588     @SuppressWarnings("checkstyle:IllegalCatch")
 589     public void onInterfaceUp(BigInteger dpnId, String intfName, Uuid subnetId) {
 590         //TODO(vivek): Change this to use more granularized lock at subnetId level
 591         SubnetToDpn subDpn = null;
 592         if (dpnId == null || Objects.equals(dpnId, BigInteger.ZERO)) {
 593             LOG.error("{} onInterfaceUp: Unable to determine the DPNID for port {} on subnet {}", LOGGING_PREFIX,
 594                     intfName, subnetId.getValue());
 595             return;
 596         }
 597         try {
 598             vpnUtil.lockSubnet(subnetId.getValue());
 599             InstanceIdentifier<SubnetOpDataEntry> subOpIdentifier =
 600                     InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class,
 601                             new SubnetOpDataEntryKey(subnetId)).build();
 602             Optional<SubnetOpDataEntry> optionalSubs = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 603                     LogicalDatastoreType.OPERATIONAL, subOpIdentifier);
 604             if (!optionalSubs.isPresent()) {
 605                 LOG.trace("{} onInterfaceUp: SubnetOpDataEntry for subnet {} is not available."
 606                         + " Ignoring interfaceUp for port{}", LOGGING_PREFIX, subnetId.getValue(), intfName);
 607                 return;
 608             }
 609             subOpDpnManager.addPortOpDataEntry(intfName, subnetId, dpnId);
 610             subDpn = subOpDpnManager.addInterfaceToDpn(subnetId, dpnId, intfName);
 611             if (subDpn == null) {
 612                 return;
 613             }
 614             SubnetOpDataEntry subnetOpDataEntry = optionalSubs.get();
 615             SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(subnetOpDataEntry);
 616             LOG.info("{} onInterfaceUp: Updating the SubnetOpDataEntry node for subnet {} subnetIp {} vpn {}"
 617                             + " rd {} TaskState {} lastTaskState {}" , LOGGING_PREFIX, subnetId.getValue(),
 618                     subOpBuilder.getSubnetCidr(), subOpBuilder.getVpnName(), subOpBuilder.getVrfId(),
 619                     subOpBuilder.getRouteAdvState(), subOpBuilder.getLastAdvState());
 620             boolean isExternalSubnetVpn = VpnUtil.isExternalSubnetVpn(subnetOpDataEntry.getVpnName(),
 621                     subnetId.getValue());
 622             List<SubnetToDpn> subDpnList = subOpBuilder.getSubnetToDpn();
 623             subDpnList.add(subDpn);
 624             subOpBuilder.setSubnetToDpn(subDpnList);
 625             if (subOpBuilder.getRouteAdvState() != TaskState.Advertised) {
 626                 if (subOpBuilder.getNhDpnId() == null) {
 627                     // No nexthop selected yet, elect one now
 628                     electNewDpnForSubnetRoute(subOpBuilder, null /* oldDpnId */, subnetId,
 629                             null /*networkId*/, !isExternalSubnetVpn);
 630                 } else if (!isExternalSubnetVpn) {
 631                     // Already nexthop has been selected, only publishing to bgp required, so publish to bgp
 632                     getNexthopTepAndPublishRoute(subOpBuilder, subnetId);
 633                 }
 634             }
 635             SubnetOpDataEntry subOpEntry = subOpBuilder.build();
 636             SingleTransactionDataBroker.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier,
 637                     subOpEntry, VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 638             LOG.info("{} onInterfaceUp: Updated subnetopdataentry to OP Datastore port {} up for subnet {}"
 639                             + " subnetIp {} vpnName {} rd {} TaskState {} lastTaskState {} ", LOGGING_PREFIX, intfName,
 640                     subnetId.getValue(), subOpEntry.getSubnetCidr(), subOpEntry.getVpnName(),
 641                     subOpEntry.getVrfId(), subOpEntry.getRouteAdvState(), subOpEntry.getLastAdvState());
 642         } catch (RuntimeException e) {
 643             LOG.error("{} onInterfaceUp: Unable to handle interface up event for port {} in subnet {}",
 644                     LOGGING_PREFIX, intfName, subnetId.getValue(), e);
 645         } catch (ReadFailedException e) {
 646             LOG.error("{} onInterfaceUp: Failed to read data store for interface {} dpn {} subnet {}", LOGGING_PREFIX,
 647                     intfName, dpnId, subnetId);
 648         } catch (TransactionCommitFailedException e) {
 649             LOG.error("{} onInterfaceUp: Updation of SubnetOpDataEntry for subnet {} on port {} up failed",
 650                     LOGGING_PREFIX, subnetId.getValue(), intfName, e);
 651         } finally {
 652             vpnUtil.unlockSubnet(subnetId.getValue());
 653         }
 654     }
 655
 656     // TODO Clean up the exception handling
 657     @SuppressWarnings("checkstyle:IllegalCatch")
 658     public void onInterfaceDown(final BigInteger dpnId, final String interfaceName, Uuid subnetId) {
 659         if (dpnId == null || Objects.equals(dpnId, BigInteger.ZERO)) {
 660             LOG.error("{} onInterfaceDown: Unable to determine the DPNID for port {} on subnet {}", LOGGING_PREFIX,
 661                     interfaceName, subnetId.getValue());
 662             return;
 663         }
 664         try {
 665             vpnUtil.lockSubnet(subnetId.getValue());
 666             boolean last = subOpDpnManager.removeInterfaceFromDpn(subnetId, dpnId, interfaceName);
 667             InstanceIdentifier<SubnetOpDataEntry> subOpIdentifier =
 668                     InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class,
 669                             new SubnetOpDataEntryKey(subnetId)).build();
 670             Optional<SubnetOpDataEntry> optionalSubs = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 671                     LogicalDatastoreType.OPERATIONAL,
 672                     subOpIdentifier);
 673             if (!optionalSubs.isPresent()) {
 674                 LOG.info("{} onInterfaceDown: SubnetOpDataEntry for subnet {} is not available."
 675                         + " Ignoring port {} down event.", LOGGING_PREFIX, subnetId.getValue(), interfaceName);
 676                 return;
 677             }
 678             SubnetOpDataEntry subnetOpDataEntry = optionalSubs.get();
 679             SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(subnetOpDataEntry);
 680             LOG.info("{} onInterfaceDown: Updating the SubnetOpDataEntry node for subnet {} subnetIp {}"
 681                             + " vpnName {} rd {} TaskState {} lastTaskState {} on port {} down", LOGGING_PREFIX,
 682                     subnetId.getValue(), subOpBuilder.getSubnetCidr(), subOpBuilder.getVpnName(),
 683                     subOpBuilder.getVrfId(), subOpBuilder.getRouteAdvState(), subOpBuilder.getLastAdvState(),
 684                     interfaceName);
 685             BigInteger nhDpnId = subOpBuilder.getNhDpnId();
 686             if (nhDpnId != null && nhDpnId.equals(dpnId)) {
 687                 // select another NhDpnId
 688                 if (last) {
 689                     LOG.debug("{} onInterfaceDown: Last active port {} on the subnet {} subnetIp {} vpn {}"
 690                                     + " rd {}", LOGGING_PREFIX, interfaceName, subnetId.getValue(),
 691                             subOpBuilder.getSubnetCidr(), subOpBuilder.getVpnName(), subOpBuilder.getVrfId());
 692                     // last port on this DPN, so we need to elect the new NHDpnId
 693                     electNewDpnForSubnetRoute(subOpBuilder, dpnId, subnetId, null /*networkId*/,
 694                             !VpnUtil.isExternalSubnetVpn(subnetOpDataEntry.getVpnName(), subnetId.getValue()));
 695                     SingleTransactionDataBroker.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL,
 696                             subOpIdentifier, subOpBuilder.build(), VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 697                     LOG.info("{} onInterfaceDown: Updated subnetopdataentry for subnet {} subnetIp {} vpnName {}"
 698                                     + " rd {} to OP Datastore on port {} down ", LOGGING_PREFIX, subnetId.getValue(),
 699                             subOpBuilder.getSubnetCidr(), subOpBuilder.getVpnName(), subOpBuilder.getVrfId(),
 700                             interfaceName);
 701                 }
 702             }
 703         } catch (RuntimeException e) { //TODO: Remove RuntimeException
 704             LOG.error("{} onInterfaceDown: Unable to handle interface down event for port {} in subnet {}",
 705                     LOGGING_PREFIX, interfaceName, subnetId.getValue(), e);
 706         } catch (ReadFailedException e) {
 707             LOG.error("{} onInterfaceDown: Failed to read data store for interface {} dpn {} subnet {}",
 708                     LOGGING_PREFIX, interfaceName, dpnId, subnetId.getValue(), e);
 709         } catch (TransactionCommitFailedException ex) {
 710             LOG.error("{} onInterfaceDown: SubnetOpDataEntry update on interface {} down event for subnet {} failed",
 711                     LOGGING_PREFIX, interfaceName, subnetId.getValue(), ex);
 712         } finally {
 713             vpnUtil.unlockSubnet(subnetId.getValue());
 714         }
 715     }
 716
 717     // TODO Clean up the exception handling
 718     @SuppressWarnings("checkstyle:IllegalCatch")
 719     public void updateSubnetRouteOnTunnelUpEvent(Uuid subnetId, BigInteger dpnId) {
 720         LOG.info("{} updateSubnetRouteOnTunnelUpEvent: Subnet {} Dpn {}", LOGGING_PREFIX, subnetId.getValue(),
 721                 dpnId.toString());
 722         try {
 723             vpnUtil.lockSubnet(subnetId.getValue());
 724             InstanceIdentifier<SubnetOpDataEntry> subOpIdentifier =
 725                     InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class,
 726                             new SubnetOpDataEntryKey(subnetId)).build();
 727             Optional<SubnetOpDataEntry> optionalSubs = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 728                     LogicalDatastoreType.OPERATIONAL, subOpIdentifier);
 729             if (!optionalSubs.isPresent()) {
 730                 LOG.error("{} updateSubnetRouteOnTunnelUpEvent: SubnetOpDataEntry for subnet {} is not available",
 731                         LOGGING_PREFIX, subnetId.getValue());
 732                 return;
 733             }
 734             LOG.info("{} updateSubnetRouteOnTunnelUpEvent: Subnet {} subnetIp {} vpnName {} rd {} TaskState {}"
 735                             + " lastTaskState {} Dpn {}", LOGGING_PREFIX, subnetId.getValue(),
 736                     optionalSubs.get().getSubnetCidr(), optionalSubs.get().getVpnName(),
 737                     optionalSubs.get().getVrfId(), optionalSubs.get().getRouteAdvState(),
 738                     optionalSubs.get().getLastAdvState(), dpnId.toString());
 739             SubnetOpDataEntry subOpEntry = optionalSubs.get();
 740             SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(subOpEntry);
 741             boolean isExternalSubnetVpn = VpnUtil.isExternalSubnetVpn(subOpEntry.getVpnName(), subnetId.getValue());
 742             if (subOpBuilder.getRouteAdvState() != TaskState.Advertised) {
 743                 if (subOpBuilder.getNhDpnId() == null) {
 744                     // No nexthop selected yet, elect one now
 745                     electNewDpnForSubnetRoute(subOpBuilder, null /* oldDpnId */, subnetId,
 746                             null /*networkId*/, !isExternalSubnetVpn);
 747                 } else if (!isExternalSubnetVpn) {
 748                     // Already nexthop has been selected, only publishing to bgp required, so publish to bgp
 749                     getNexthopTepAndPublishRoute(subOpBuilder, subnetId);
 750                 }
 751             }
 752             subOpEntry = subOpBuilder.build();
 753             SingleTransactionDataBroker.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier,
 754                     subOpEntry, VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 755             LOG.info("{} updateSubnetRouteOnTunnelUpEvent: Updated subnetopdataentry to OP Datastore tunnel up"
 756                             + " on dpn {} for subnet {} subnetIp {} vpnName {} rd {} TaskState {} lastTaskState {}",
 757                     LOGGING_PREFIX, dpnId.toString(), subnetId.getValue(), subOpEntry.getSubnetCidr(),
 758                     subOpEntry.getVpnName(), subOpEntry.getVrfId(), subOpEntry.getRouteAdvState(),
 759                     subOpEntry.getLastAdvState());
 760         } catch (RuntimeException e) { //TODO: lockSubnet() throws this exception. Rectify lockSubnet()
 761             LOG.error("{} updateSubnetRouteOnTunnelUpEvent: Unable to handle tunnel up event for subnetId {} dpnId {}",
 762                     LOGGING_PREFIX, subnetId.getValue(), dpnId.toString(), e);
 763         } catch (TransactionCommitFailedException ex) {
 764             LOG.error("{} updateSubnetRouteOnTunnelUpEvent: Failed to update subnetRoute for subnet {} on dpn {}",
 765                     LOGGING_PREFIX, subnetId.getValue(), dpnId.toString(), ex);
 766         } catch (ReadFailedException e) {
 767             LOG.error("{} updateSubnetRouteOnTunnelUpEvent: Failed to read data store for subnet {} on dpn {}",
 768                     LOGGING_PREFIX, subnetId.getValue(), dpnId.toString(), e);
 769         }
 770         finally {
 771             vpnUtil.unlockSubnet(subnetId.getValue());
 772         }
 773     }
 774
 775     // TODO Clean up the exception handling
 776     @SuppressWarnings("checkstyle:IllegalCatch")
 777     public void updateSubnetRouteOnTunnelDownEvent(Uuid subnetId, BigInteger dpnId) {
 778         LOG.info("updateSubnetRouteOnTunnelDownEvent: Subnet {} Dpn {}", subnetId.getValue(), dpnId.toString());
 779         //TODO(vivek): Change this to use more granularized lock at subnetId level
 780         try {
 781             vpnUtil.lockSubnet(subnetId.getValue());
 782             InstanceIdentifier<SubnetOpDataEntry> subOpIdentifier =
 783                     InstanceIdentifier.builder(SubnetOpData.class).child(SubnetOpDataEntry.class,
 784                             new SubnetOpDataEntryKey(subnetId)).build();
 785             Optional<SubnetOpDataEntry> optionalSubs = SingleTransactionDataBroker.syncReadOptional(dataBroker,
 786                     LogicalDatastoreType.OPERATIONAL, subOpIdentifier);
 787             if (!optionalSubs.isPresent()) {
 788                 LOG.error("{} updateSubnetRouteOnTunnelDownEvent: SubnetOpDataEntry for subnet {}"
 789                         + " is not available", LOGGING_PREFIX, subnetId.getValue());
 790                 return;
 791             }
 792             LOG.debug("{} updateSubnetRouteOnTunnelDownEvent: Dpn {} Subnet {} subnetIp {} vpnName {} rd {}"
 793                             + " TaskState {} lastTaskState {}", LOGGING_PREFIX, dpnId.toString(), subnetId.getValue(),
 794                     optionalSubs.get().getSubnetCidr(), optionalSubs.get().getVpnName(),
 795                     optionalSubs.get().getVrfId(), optionalSubs.get().getRouteAdvState(),
 796                     optionalSubs.get().getLastAdvState());
 797             SubnetOpDataEntry subOpEntry = null;
 798             SubnetOpDataEntryBuilder subOpBuilder = new SubnetOpDataEntryBuilder(optionalSubs.get());
 799             BigInteger nhDpnId = subOpBuilder.getNhDpnId();
 800             if (nhDpnId != null && nhDpnId.equals(dpnId)) {
 801                 electNewDpnForSubnetRoute(subOpBuilder, dpnId, subnetId, null /*networkId*/, true);
 802                 subOpEntry = subOpBuilder.build();
 803                 SingleTransactionDataBroker.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, subOpIdentifier,
 804                         subOpEntry, VpnUtil.SINGLE_TRANSACTION_BROKER_NO_RETRY);
 805                 LOG.info("{} updateSubnetRouteOnTunnelDownEvent: Subnet {} Dpn {} subnetIp {} vpnName {} rd {}"
 806                                 + " TaskState {} lastTaskState {}", LOGGING_PREFIX, subnetId.getValue(),
 807                         dpnId.toString(), optionalSubs.get().getSubnetCidr(), optionalSubs.get().getVpnName(),
 808                         optionalSubs.get().getVrfId(), optionalSubs.get().getRouteAdvState(),
 809                         optionalSubs.get().getLastAdvState());
 810             }
 811         } catch (RuntimeException e) {
 812             LOG.error("{} updateSubnetRouteOnTunnelDownEvent: Unable to handle tunnel down event for subnetId {}"
 813                     + " dpnId {}", LOGGING_PREFIX, subnetId.getValue(), dpnId.toString(), e);
 814         } catch (ReadFailedException e) {
 815             LOG.error("{} Failed to read data store for subnet {} dpn {}", LOGGING_PREFIX, subnetId, dpnId);
 816         } catch (TransactionCommitFailedException e) {
 817             LOG.error("{} updateSubnetRouteOnTunnelDownEvent: Updation of SubnetOpDataEntry for subnet {}"
 818                     + " on dpn {} failed", LOGGING_PREFIX, subnetId.getValue(), dpnId, e);
 819         } finally {
 820             vpnUtil.unlockSubnet(subnetId.getValue());
 821         }
 822     }
 823
 824     @SuppressWarnings("checkstyle:IllegalCatch")
 825     private void publishSubnetRouteToBgp(SubnetOpDataEntryBuilder subOpBuilder, String nextHopIp) {
 826         try {
 827             //BGP manager will handle withdraw and advertise internally if prefix
 828             //already exist
 829             long label = 0;
 830             long l3vni = 0;
 831
 832             VrfEntry.EncapType encapType =  VpnUtil.getEncapType(VpnUtil.isL3VpnOverVxLan(l3vni));
 833             if (encapType.equals(VrfEntry.EncapType.Vxlan)) {
 834                 l3vni = subOpBuilder.getL3vni();
 835             } else {
 836                 label = subOpBuilder.getLabel();
 837             }
 838             bgpManager.advertisePrefix(subOpBuilder.getVrfId(), null /*macAddress*/, subOpBuilder.getSubnetCidr(),
 839                     Arrays.asList(nextHopIp), encapType,  label, l3vni,
 840                     0 /*l2vni*/, null /*gatewayMacAddress*/);
 841             subOpBuilder.setLastAdvState(subOpBuilder.getRouteAdvState()).setRouteAdvState(TaskState.Advertised);
 842         } catch (Exception e) {
 843             LOG.error("{} publishSubnetRouteToBgp: Subnet route not advertised for subnet {} subnetIp {} vpn {} rd {}"
 844                     + " with dpnid {}", LOGGING_PREFIX, subOpBuilder.getSubnetId().getValue(),
 845                     subOpBuilder.getSubnetCidr(), subOpBuilder.getVpnName(), subOpBuilder.getVrfId(), nextHopIp, e);
 846         }
 847     }
 848
 849     private void getNexthopTepAndPublishRoute(SubnetOpDataEntryBuilder subOpBuilder, Uuid subnetId) {
 850         String nhTepIp = InterfaceUtils.getEndpointIpAddressForDPN(dataBroker,
 851                 subOpBuilder.getNhDpnId());
 852         if (nhTepIp != null) {
 853             publishSubnetRouteToBgp(subOpBuilder, nhTepIp);
 854         } else {
 855             LOG.warn("Unable to find nexthopip for rd {} subnetroute subnetip {} for dpnid {}",
 856                     subOpBuilder.getVrfId(), subOpBuilder.getSubnetCidr(),
 857                     subOpBuilder.getNhDpnId().toString());
 858             electNewDpnForSubnetRoute(subOpBuilder, null /* oldDpnId */, subnetId, null /*networkId*/, true);
 859         }
 860     }
 861
 862     // TODO Clean up the exception handling
 863     @SuppressWarnings("checkstyle:IllegalCatch")
 864     private boolean addSubnetRouteToFib(String rd, String subnetIp, BigInteger nhDpnId, String nextHopIp,
 865                                         String vpnName, Long elanTag, long label, long l3vni,
 866                                         Uuid subnetId, boolean isBgpVpn, String networkName) {
 867
 868         Preconditions.checkNotNull(rd,
 869                 LOGGING_PREFIX + " addSubnetRouteToFib: RouteDistinguisher cannot be null or empty!");
 870         Preconditions.checkNotNull(subnetIp,
 871                 LOGGING_PREFIX + " addSubnetRouteToFib: SubnetRouteIp cannot be null or empty!");
 872         Preconditions.checkNotNull(vpnName, LOGGING_PREFIX + " addSubnetRouteToFib: vpnName cannot be null or empty!");
 873         Preconditions.checkNotNull(elanTag, LOGGING_PREFIX + " addSubnetRouteToFib: elanTag cannot be null or empty!");
 874         Preconditions.checkNotNull(label, LOGGING_PREFIX + " addSubnetRouteToFib: label cannot be null or empty!");
 875         VrfEntry.EncapType encapType = VpnUtil.getEncapType(VpnUtil.isL3VpnOverVxLan(l3vni));
 876         VpnPopulator vpnPopulator = L3vpnRegistry.getRegisteredPopulator(encapType);
 877         LOG.info("{} addSubnetRouteToFib: Adding SubnetRoute fib entry for vpnName {}, subnetIP {}, elanTag {}",
 878                 LOGGING_PREFIX, vpnName, subnetIp, elanTag);
 879         L3vpnInput input = new L3vpnInput().setRouteOrigin(RouteOrigin.CONNECTED).setRd(rd).setVpnName(vpnName)
 880                 .setSubnetIp(subnetIp).setNextHopIp(nextHopIp).setL3vni(l3vni).setLabel(label).setElanTag(elanTag)
 881                 .setDpnId(nhDpnId).setEncapType(encapType).setNetworkName(networkName).setPrimaryRd(rd);
 882         if (!isBgpVpn) {
 883             vpnPopulator.populateFib(input, null /*writeCfgTxn*/);
 884             return true;
 885         }
 886         Preconditions.checkNotNull(nextHopIp, LOGGING_PREFIX + "NextHopIp cannot be null or empty!");
 887         vpnUtil.syncWrite(LogicalDatastoreType.OPERATIONAL, VpnUtil
 888                 .getPrefixToInterfaceIdentifier(vpnUtil.getVpnId(vpnName), subnetIp), VpnUtil
 889                 .getPrefixToInterface(nhDpnId, subnetId.getValue(), subnetIp, Prefixes.PrefixCue.SubnetRoute));
 890         vpnPopulator.populateFib(input, null /*writeCfgTxn*/);
 891         try {
 892             // BGP manager will handle withdraw and advertise internally if prefix
 893             // already exist
 894             bgpManager.advertisePrefix(rd, null /*macAddress*/, subnetIp, Collections.singletonList(nextHopIp),
 895                     encapType, label, l3vni, 0 /*l2vni*/, null /*gatewayMacAddress*/);
 896         } catch (Exception e) {
 897             LOG.error("{} addSubnetRouteToFib: Subnet route not advertised for subnet {} subnetIp {} vpnName {} rd {} "
 898                     + "with dpnid {}", LOGGING_PREFIX, subnetId.getValue(), subnetIp, vpnName, rd, nhDpnId, e);
 899             return false;
 900         }
 901         return true;
 902     }
 903
 904     private int getLabel(String rd, String subnetIp) {
 905         int label = vpnUtil.getUniqueId(VpnConstants.VPN_IDPOOL_NAME, VpnUtil.getNextHopLabelKey(rd, subnetIp));
 906         LOG.trace("{} getLabel: Allocated subnetroute label {} for rd {} prefix {}", LOGGING_PREFIX, label, rd,
 907                 subnetIp);
 908         return label;
 909     }
 910
 911     // TODO Clean up the exception handling
 912     @SuppressWarnings("checkstyle:IllegalCatch")
 913     private boolean deleteSubnetRouteFromFib(String rd, String subnetIp, String vpnName, boolean isBgpVpn) {
 914         Preconditions.checkNotNull(rd,
 915                 LOGGING_PREFIX + " deleteSubnetRouteFromFib: RouteDistinguisher cannot be null or empty!");
 916         Preconditions.checkNotNull(subnetIp,
 917                 LOGGING_PREFIX +  " deleteSubnetRouteFromFib: SubnetRouteIp cannot be null or empty!");
 918         deleteSubnetRouteFibEntryFromDS(rd, subnetIp, vpnName);
 919         if (isBgpVpn) {
 920             try {
 921                 bgpManager.withdrawPrefix(rd, subnetIp);
 922             } catch (Exception e) {
 923                 LOG.error("{} deleteSubnetRouteFromFib: Subnet route not withdrawn for subnetIp {} vpn {} rd {}",
 924                         LOGGING_PREFIX, subnetIp, vpnName, rd, e);
 925                 return false;
 926             }
 927         }
 928         return true;
 929     }
 930
 931     public void deleteSubnetRouteFibEntryFromDS(String rd, String prefix, String vpnName) {
 932         fibManager.removeFibEntry(rd, prefix, null);
 933         List<VpnInstanceOpDataEntry> vpnsToImportRoute = vpnUtil.getVpnsImportingMyRoute(vpnName);
 934         for (VpnInstanceOpDataEntry vpnInstance : vpnsToImportRoute) {
 935             String importingRd = vpnInstance.getVrfId();
 936             fibManager.removeFibEntry(importingRd, prefix, null);
 937             LOG.info("SUBNETROUTE: deleteSubnetRouteFibEntryFromDS: Deleted imported subnet route rd {} prefix {}"
 938                     + " from vpn {} importingRd {}", rd, prefix, vpnInstance.getVpnInstanceName(), importingRd);
 939         }
 940         LOG.info("SUBNETROUTE: deleteSubnetRouteFibEntryFromDS: Removed subnetroute FIB for prefix {} rd {}"
 941                 + " vpnName {}", prefix, rd, vpnName);
 942     }
 943
 944     // TODO Clean up the exception handling
 945     @SuppressWarnings("checkstyle:IllegalCatch")
 946     private void electNewDpnForSubnetRoute(SubnetOpDataEntryBuilder subOpBuilder, @Nullable BigInteger oldDpnId,
 947                                            Uuid subnetId, Uuid networkId, boolean isBgpVpn) {
 948         List<SubnetToDpn> subDpnList = null;
 949         boolean isRouteAdvertised = false;
 950         subDpnList = subOpBuilder.getSubnetToDpn();
 951         String rd = subOpBuilder.getVrfId();
 952         String subnetIp = subOpBuilder.getSubnetCidr();
 953         String vpnName = subOpBuilder.getVpnName();
 954         long elanTag = subOpBuilder.getElanTag();
 955         boolean isAlternateDpnSelected = false;
 956         long l3vni = 0;
 957         long label = 0;
 958         String networkName = networkId != null ? networkId.getValue() : null;
 959
 960         LOG.info("{} electNewDpnForSubnetRoute: Handling subnet {} subnetIp {} vpn {} rd {} TaskState {}"
 961                 + " lastTaskState {}", LOGGING_PREFIX, subnetId.getValue(), subnetIp, subOpBuilder.getVpnName(),
 962                 subOpBuilder.getVrfId(), subOpBuilder.getRouteAdvState(), subOpBuilder.getLastAdvState());
 963         if (!isBgpVpn) {
 964             // Non-BGPVPN as it stands here represents use-case of External Subnets of VLAN-Provider-Network
 965             //  TODO(Tomer):  Pulling in both external and internal VLAN-Provider-Network need to be
 966             // blended more better into this design.
 967             if (VpnUtil.isL3VpnOverVxLan(subOpBuilder.getL3vni())) {
 968                 l3vni = subOpBuilder.getL3vni();
 969             } else {
 970                 label = getLabel(rd, subnetIp);
 971                 subOpBuilder.setLabel(label);
 972             }
 973             isRouteAdvertised = addSubnetRouteToFib(rd, subnetIp, null /* nhDpnId */, null /* nhTepIp */,
 974                     vpnName, elanTag, label, l3vni, subnetId, isBgpVpn, networkName);
 975             if (isRouteAdvertised) {
 976                 subOpBuilder.setRouteAdvState(TaskState.Advertised);
 977             } else {
 978                 LOG.error("{} electNewDpnForSubnetRoute: Unable to find TepIp for subnet {} subnetip {} vpnName {}"
 979                     + " rd {}, attempt next dpn", LOGGING_PREFIX, subnetId.getValue(), subnetIp,
 980                     vpnName, rd);
 981                 subOpBuilder.setRouteAdvState(TaskState.PendingAdvertise);
 982             }
 983             return;
 984         }
 985
 986         String nhTepIp = null;
 987         BigInteger nhDpnId = null;
 988         for (SubnetToDpn subnetToDpn : subDpnList) {
 989             if (subnetToDpn.getDpnId().equals(oldDpnId)) {
 990                 // Is this same is as input dpnId, then ignore it
 991                 continue;
 992             }
 993             nhDpnId = subnetToDpn.getDpnId();
 994             if (vpnNodeListener.isConnectedNode(nhDpnId)) {
 995                 // selected dpnId is connected to ODL
 996                 // but does it have a TEP configured at all?
 997                 try {
 998                     nhTepIp = InterfaceUtils.getEndpointIpAddressForDPN(dataBroker, nhDpnId);
 999                     if (nhTepIp != null) {
1000                         isAlternateDpnSelected = true;
1001                         break;
1002                     }
1003                 } catch (Exception e) {
1004                     LOG.warn("{} electNewDpnForSubnetRoute: Unable to find TepIp for rd {} subnetroute subnetip {}"
1005                             + " for dpnid {}, attempt next", LOGGING_PREFIX, rd, subnetIp, nhDpnId.toString(), e);
1006                 }
1007             }
1008         }
1009         if (!isAlternateDpnSelected) {
1010             //If no alternate Dpn is selected as nextHopDpn, withdraw the subnetroute if it had a nextHop already.
1011             if (isRouteAdvertised(subOpBuilder) && oldDpnId != null) {
1012                 LOG.info("{} electNewDpnForSubnetRoute: No alternate DPN available for subnet {} subnetIp {} vpn {}"
1013                         + " rd {} Prefix withdrawn from BGP", LOGGING_PREFIX, subnetId.getValue(), subnetIp, vpnName,
1014                         rd);
1015                 // Withdraw route from BGP for this subnet
1016                 boolean routeWithdrawn = deleteSubnetRouteFromFib(rd, subnetIp, vpnName, isBgpVpn);
1017                 subOpBuilder.setNhDpnId(null);
1018                 subOpBuilder.setLastAdvState(subOpBuilder.getRouteAdvState());
1019                 if (routeWithdrawn) {
1020                     subOpBuilder.setRouteAdvState(TaskState.Withdrawn);
1021                 } else {
1022                     LOG.error("{} electNewDpnForSubnetRoute: Withdrawing NextHopDPN {} for subnet {} subnetIp {}"
1023                         + " vpn {} rd {} from BGP failed", LOGGING_PREFIX, oldDpnId, subnetId.getValue(),
1024                         subnetIp, vpnName, rd);
1025                     subOpBuilder.setRouteAdvState(TaskState.PendingWithdraw);
1026                 }
1027             }
1028         } else {
1029             //If alternate Dpn is selected as nextHopDpn, use that for subnetroute.
1030             subOpBuilder.setNhDpnId(nhDpnId);
1031             if (VpnUtil.isL3VpnOverVxLan(subOpBuilder.getL3vni())) {
1032                 l3vni = subOpBuilder.getL3vni();
1033             } else {
1034                 label = getLabel(rd, subnetIp);
1035                 subOpBuilder.setLabel(label);
1036             }
1037             //update the VRF entry for the subnetroute.
1038             isRouteAdvertised = addSubnetRouteToFib(rd, subnetIp, nhDpnId, nhTepIp,
1039                     vpnName, elanTag, label, l3vni, subnetId, isBgpVpn, networkName);
1040             subOpBuilder.setLastAdvState(subOpBuilder.getRouteAdvState());
1041             if (isRouteAdvertised) {
1042                 subOpBuilder.setRouteAdvState(TaskState.Advertised);
1043             } else {
1044                 LOG.error("{} electNewDpnForSubnetRoute: Swapping to add new NextHopDpn {} for subnet {} subnetIp {}"
1045                         + " vpn {} rd {} failed", LOGGING_PREFIX, nhDpnId, subnetId.getValue(), subnetIp, vpnName, rd);
1046                 subOpBuilder.setRouteAdvState(TaskState.PendingAdvertise);
1047             }
1048         }
1049     }
1050
1051     private boolean isRouteAdvertised(SubnetOpDataEntryBuilder subOpBuilder) {
1052         return subOpBuilder.getRouteAdvState() == TaskState.Advertised
1053                 || subOpBuilder.getRouteAdvState() == TaskState.PendingAdvertise;
1054     }
1055 }
1056