itm/itm-impl/src/main/java/org/opendaylight/genius/itm/confighelpers/ItmInternalTunnelDeleteWorker.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.genius.itm.confighelpers;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.util.concurrent.ListenableFuture;
  12 import java.math.BigInteger;
  13 import java.util.ArrayList;
  14 import java.util.List;
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  18 import org.opendaylight.genius.itm.impl.ItmUtils;
  19 import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.rev160406.TunnelMonitoringTypeBase;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.rev160406.TunnelMonitoringTypeLldp;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.rev160406.TunnelTypeBase;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.DpnEndpoints;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.TunnelList;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.DPNTEPsInfo;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.dpn.teps.info.TunnelEndPoints;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.dpn.teps.info.TunnelEndPointsBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.dpn.teps.info.tunnel.end.points.TzMembership;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.tunnel.list.InternalTunnel;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.tunnel.list.InternalTunnelKey;
  33 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 public class ItmInternalTunnelDeleteWorker {
  38     private static final Logger logger = LoggerFactory.getLogger(ItmInternalTunnelDeleteWorker.class);
  39
  40     public static List<ListenableFuture<Void>> deleteTunnels(DataBroker dataBroker, IdManagerService idManagerService,
  41             IMdsalApiManager mdsalManager, List<DPNTEPsInfo> dpnTepsList, List<DPNTEPsInfo> meshedDpnList) {
  42         logger.trace("TEPs to be deleted {} ", dpnTepsList);
  43         List<ListenableFuture<Void>> futures = new ArrayList<>();
  44         WriteTransaction t = dataBroker.newWriteOnlyTransaction();
  45         try {
  46             if (dpnTepsList == null || dpnTepsList.size() == 0) {
  47                 logger.debug("no vtep to delete");
  48                 return futures;
  49             }
  50
  51             if (meshedDpnList == null || meshedDpnList.size() == 0) {
  52                 logger.debug("No Meshed Vteps");
  53                 return futures;
  54             }
  55             for (DPNTEPsInfo srcDpn : dpnTepsList) {
  56                 logger.trace("Processing srcDpn " + srcDpn);
  57
  58                 List<TunnelEndPoints> meshedEndPtCache = ItmUtils.getTEPsForDpn(srcDpn.getDPNID(), meshedDpnList);
  59                 if (meshedEndPtCache == null) {
  60                     logger.debug("No Tunnel End Point configured for this DPN {}", srcDpn.getDPNID());
  61                     continue;
  62                 }
  63                 logger.debug( "Entries in meshEndPointCache {} for DPN Id{} ", meshedEndPtCache.size(), srcDpn.getDPNID() );
  64                 for (TunnelEndPoints srcTep : srcDpn.getTunnelEndPoints()) {
  65                     logger.trace("Processing srcTep " + srcTep);
  66                     List<TzMembership> srcTZones = srcTep.getTzMembership();
  67                     boolean tepDeleteFlag = false;
  68                     // First, take care of tunnel removal, so run through all other DPNS other than srcDpn
  69                     // In the tep received from Delete DCN, the membership list will always be 1 as the DCN is at transport zone level
  70                     // Hence if a tunnel is shared across TZs, compare the original membership list between end points to decide if tunnel to be deleted.
  71                     for (DPNTEPsInfo dstDpn : meshedDpnList) {
  72                         if (!srcDpn.getDPNID().equals(dstDpn.getDPNID())) {
  73                             for (TunnelEndPoints dstTep : dstDpn.getTunnelEndPoints()) {
  74                                 if (!ItmUtils.getIntersection(dstTep.getTzMembership(), srcTZones).isEmpty()) {
  75                                     List<TzMembership> originalTzMembership = ItmUtils.getOriginalTzMembership(srcTep, srcDpn.getDPNID(), meshedDpnList);
  76                                     if (ItmUtils.getIntersection(dstTep.getTzMembership(), originalTzMembership).size() == 1) {
  77                                         if (checkIfTrunkExists(dstDpn.getDPNID(), srcDpn.getDPNID(), srcTep.getTunnelType(), dataBroker)) {
  78                                             // remove all trunk interfaces
  79                                             logger.trace("Invoking removeTrunkInterface between source TEP {} , Destination TEP {} ", srcTep, dstTep);
  80                                             removeTrunkInterface(dataBroker, idManagerService, srcTep, dstTep, srcDpn.getDPNID(), dstDpn.getDPNID(), t, futures);
  81                                         }
  82                                     }
  83                                 }
  84                             }
  85                         }
  86                     }
  87                     for (DPNTEPsInfo dstDpn : meshedDpnList) {
  88                         // Second, take care of Tep TZ membership and identify if tep can be removed
  89                         if (srcDpn.getDPNID().equals(dstDpn.getDPNID())){
  90                             // Same DPN, so remove the TZ membership
  91                             for (TunnelEndPoints dstTep : dstDpn.getTunnelEndPoints()) {
  92                                 if (dstTep.getIpAddress().equals(srcTep.getIpAddress())) {
  93                                     // Remove the deleted TZ membership from the TEP
  94                                     logger.debug("Removing TZ list {} from Existing TZ list {} ", srcTZones, dstTep.getTzMembership());
  95                                     List<TzMembership> updatedList = ItmUtils.removeTransportZoneMembership(dstTep, srcTZones);
  96                                     if (updatedList.isEmpty()) {
  97                                         logger.debug(" This TEP can be deleted " + srcTep);
  98                                         tepDeleteFlag = true;
  99                                     }else {
 100                                         TunnelEndPointsBuilder modifiedTepBld = new TunnelEndPointsBuilder(dstTep);
 101                                         modifiedTepBld.setTzMembership(updatedList);
 102                                         TunnelEndPoints modifiedTep = modifiedTepBld.build() ;
 103                                         InstanceIdentifier<TunnelEndPoints> tepPath =
 104                                                 InstanceIdentifier.builder(DpnEndpoints.class).child(DPNTEPsInfo.class, dstDpn.getKey())
 105                                                         .child(TunnelEndPoints.class, dstTep.getKey()).build();
 106
 107                                         logger.debug(" Store the modified Tep in DS {} ", modifiedTep);
 108                                         t.put(LogicalDatastoreType.CONFIGURATION, tepPath, modifiedTep);
 109                                     }
 110                                 }
 111                             }
 112                         }
 113                     }
 114                     if (tepDeleteFlag) {
 115                         // Third, removing vtep / dpn from Tunnels OpDs.
 116                         InstanceIdentifier<TunnelEndPoints> tepPath =
 117                                 InstanceIdentifier.builder(DpnEndpoints.class).child(DPNTEPsInfo.class, srcDpn.getKey())
 118                                         .child(TunnelEndPoints.class, srcTep.getKey()).build();
 119
 120                         logger.trace("Tep Removal of TEP {} from DPNTEPSINFO CONFIG DS with Key {} " + srcTep, srcTep.getKey());
 121                         t.delete(LogicalDatastoreType.CONFIGURATION, tepPath);
 122                         // remove the tep from the cache
 123                         meshedEndPtCache.remove(srcTep);
 124                         Class<? extends TunnelMonitoringTypeBase> monitorProtocol = ItmUtils.determineMonitorProtocol(dataBroker);
 125                         InstanceIdentifier<DPNTEPsInfo> dpnPath =
 126                                 InstanceIdentifier.builder(DpnEndpoints.class).child(DPNTEPsInfo.class, srcDpn.getKey())
 127                                         .build();
 128
 129                         if (meshedEndPtCache.isEmpty()) {
 130                             // remove dpn if no vteps exist on dpn
 131                             if (monitorProtocol.isAssignableFrom(TunnelMonitoringTypeLldp.class)) {
 132                                 logger.debug("Removing Terminating Service Table Flow ");
 133                                 ItmUtils.setUpOrRemoveTerminatingServiceTable(srcDpn.getDPNID(), mdsalManager, false);
 134                             }
 135                             logger.trace("DPN Removal from DPNTEPSINFO CONFIG DS " + srcDpn.getDPNID());
 136                             t.delete(LogicalDatastoreType.CONFIGURATION, dpnPath);
 137                             InstanceIdentifier<DpnEndpoints> tnlContainerPath =
 138                                     InstanceIdentifier.builder(DpnEndpoints.class).build();
 139                             Optional<DpnEndpoints> containerOptional =
 140                                     ItmUtils.read(LogicalDatastoreType.CONFIGURATION,
 141                                             tnlContainerPath, dataBroker);
 142                             // remove container if no DPNs are present
 143                             if (containerOptional.isPresent()) {
 144                                 DpnEndpoints deps = containerOptional.get();
 145                                 if (deps.getDPNTEPsInfo() == null || deps.getDPNTEPsInfo().isEmpty()) {
 146                                     logger.trace("Container Removal from DPNTEPSINFO CONFIG DS");
 147                                     t.delete(LogicalDatastoreType.CONFIGURATION, tnlContainerPath);
 148                                 }
 149                             }
 150                         }
 151                     }
 152                 }
 153             }
 154             futures.add(t.submit());
 155         } catch (Exception e1) {
 156             logger.error("exception while deleting tep", e1);
 157         }
 158         return futures;
 159     }
 160
 161     private static void removeTrunkInterface(DataBroker dataBroker, IdManagerService idManagerService,
 162             TunnelEndPoints srcTep, TunnelEndPoints dstTep, BigInteger srcDpnId, BigInteger dstDpnId,
 163             WriteTransaction t, List<ListenableFuture<Void>> futures) {
 164         String trunkfwdIfName = ItmUtils.getTrunkInterfaceName(idManagerService, srcTep.getInterfaceName(),
 165                 new String(srcTep.getIpAddress().getValue()), new String(dstTep.getIpAddress().getValue()),
 166                 srcTep.getTunnelType().getName());
 167         logger.trace("Removing forward Trunk Interface " + trunkfwdIfName);
 168         InstanceIdentifier<Interface> trunkIdentifier = ItmUtils.buildId(trunkfwdIfName);
 169         logger.debug(" Removing Trunk Interface Name - {} , Id - {} from Config DS ", trunkfwdIfName, trunkIdentifier);
 170         t.delete(LogicalDatastoreType.CONFIGURATION, trunkIdentifier);
 171         ItmUtils.itmCache.removeInterface(trunkfwdIfName);
 172         // also update itm-state ds -- Delete the forward tunnel-interface from
 173         // the tunnel list
 174         InstanceIdentifier<InternalTunnel> path = InstanceIdentifier.create(TunnelList.class)
 175                 .child(InternalTunnel.class, new InternalTunnelKey(dstDpnId, srcDpnId, srcTep.getTunnelType()));
 176         t.delete(LogicalDatastoreType.CONFIGURATION, path);
 177         ItmUtils.itmCache.removeInternalTunnel(trunkfwdIfName);
 178         // Release the Ids for the forward trunk interface Name
 179         ItmUtils.releaseIdForTrunkInterfaceName(idManagerService, srcTep.getInterfaceName(),
 180                 new String(srcTep.getIpAddress().getValue()), new String(dstTep.getIpAddress().getValue()),
 181                 srcTep.getTunnelType().getName());
 182
 183         String trunkRevIfName = ItmUtils.getTrunkInterfaceName(idManagerService, dstTep.getInterfaceName(),
 184                 new String(dstTep.getIpAddress().getValue()), new String(srcTep.getIpAddress().getValue()),
 185                 srcTep.getTunnelType().getName());
 186         logger.trace("Removing Reverse Trunk Interface " + trunkRevIfName);
 187         trunkIdentifier = ItmUtils.buildId(trunkRevIfName);
 188         logger.debug(" Removing Trunk Interface Name - {} , Id - {} from Config DS ", trunkRevIfName, trunkIdentifier);
 189         t.delete(LogicalDatastoreType.CONFIGURATION, trunkIdentifier);
 190
 191         // also update itm-state ds -- Delete the reverse tunnel-interface from
 192         // the tunnel list
 193         path = InstanceIdentifier.create(TunnelList.class).child(InternalTunnel.class,
 194                 new InternalTunnelKey(srcDpnId, dstDpnId, dstTep.getTunnelType()));
 195         t.delete(LogicalDatastoreType.CONFIGURATION, path);
 196
 197         // Release the Ids for the reverse trunk interface Name
 198         ItmUtils.releaseIdForTrunkInterfaceName(idManagerService, dstTep.getInterfaceName(),
 199                 new String(dstTep.getIpAddress().getValue()), new String(srcTep.getIpAddress().getValue()),
 200                 dstTep.getTunnelType().getName());
 201     }
 202
 203     private static boolean checkIfTrunkExists(BigInteger srcDpnId, BigInteger dstDpnId,
 204             Class<? extends TunnelTypeBase> tunType, DataBroker dataBroker) {
 205         InstanceIdentifier<InternalTunnel> path = InstanceIdentifier.create(TunnelList.class)
 206                 .child(InternalTunnel.class, new InternalTunnelKey(dstDpnId, srcDpnId, tunType));
 207         return ItmUtils.read(LogicalDatastoreType.CONFIGURATION, path, dataBroker).isPresent();
 208     }
 209 }