neutron-vpp-mapper/src/main/java/org/opendaylight/groupbasedpolicy/neutron/vpp/mapper/processors/PortHandler.java

   1 /*\r
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.\r
   3  *\r
   4  * This program and the accompanying materials are made available under the\r
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,\r
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html\r
   7  */\r
   8 \r
   9 package org.opendaylight.groupbasedpolicy.neutron.vpp.mapper.processors;\r
  10 \r
  11 import java.util.Collections;\r
  12 import java.util.List;\r
  13 \r
  14 import javax.annotation.Nonnull;\r
  15 import javax.annotation.Nullable;\r
  16 \r
  17 import org.opendaylight.controller.md.sal.binding.api.BindingTransactionChain;\r
  18 import org.opendaylight.controller.md.sal.binding.api.DataBroker;\r
  19 import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;\r
  20 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;\r
  21 import org.opendaylight.controller.md.sal.common.api.data.AsyncTransaction;\r
  22 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;\r
  23 import org.opendaylight.controller.md.sal.common.api.data.TransactionChain;\r
  24 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;\r
  25 import org.opendaylight.groupbasedpolicy.util.DataStoreHelper;\r
  26 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;\r
  27 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;\r
  28 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.PhysAddress;\r
  29 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;\r
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.UniqueId;\r
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.neutron.gbp.mapper.rev150513.Mappings;\r
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.neutron.gbp.mapper.rev150513.mappings.GbpByNeutronMappings;\r
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.neutron.gbp.mapper.rev150513.mappings.gbp.by.neutron.mappings.BaseEndpointsByPorts;\r
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.neutron.gbp.mapper.rev150513.mappings.gbp.by.neutron.mappings.base.endpoints.by.ports.BaseEndpointByPort;\r
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.neutron.gbp.mapper.rev150513.mappings.gbp.by.neutron.mappings.base.endpoints.by.ports.BaseEndpointByPortKey;\r
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.Config;\r
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.ExcludeFromPolicy;\r
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.ExcludeFromPolicyBuilder;\r
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425._interface.attributes._interface.type.choice.LoopbackCase;\r
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425._interface.attributes._interface.type.choice.LoopbackCaseBuilder;\r
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425._interface.attributes._interface.type.choice.TapCase;\r
  42 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425._interface.attributes._interface.type.choice.TapCaseBuilder;\r
  43 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425._interface.attributes._interface.type.choice.VhostUserCaseBuilder;\r
  44 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.config.VppEndpoint;\r
  45 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.config.VppEndpointBuilder;\r
  46 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.vpp_renderer.rev160425.config.VppEndpointKey;\r
  47 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.binding.rev150712.PortBindingExtension;\r
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.binding.rev150712.binding.attributes.VifDetails;\r
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.Routers;\r
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.routers.Router;\r
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l3.rev150712.routers.attributes.routers.RouterKey;\r
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.ports.rev150712.port.attributes.FixedIps;\r
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.ports.rev150712.ports.attributes.Ports;\r
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.ports.rev150712.ports.attributes.ports.Port;\r
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.ports.rev150712.ports.attributes.ports.PortKey;\r
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;\r
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.subnets.rev150712.subnets.attributes.Subnets;\r
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.subnets.rev150712.subnets.attributes.subnets.Subnet;\r
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.subnets.rev150712.subnets.attributes.subnets.SubnetKey;\r
  60 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;\r
  61 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;\r
  62 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier.InstanceIdentifierBuilder;\r
  63 import org.slf4j.Logger;\r
  64 import org.slf4j.LoggerFactory;\r
  65 \r
  66 import com.google.common.annotations.VisibleForTesting;\r
  67 import com.google.common.base.Optional;\r
  68 import com.google.common.base.Strings;\r
  69 public class PortHandler implements TransactionChainListener {\r
  70 \r
  71     private static final Logger LOG = LoggerFactory.getLogger(PortHandler.class);\r
  72 \r
  73     private static final String COMPUTE_OWNER = "compute";\r
  74     private static final String DHCP_OWNER = "dhcp";\r
  75     static final String ROUTER_OWNER = "network:router_interface";\r
  76     private static final String[] SUPPORTED_DEVICE_OWNERS = {COMPUTE_OWNER, DHCP_OWNER, ROUTER_OWNER};\r
  77     private static final String VHOST_USER = "vhostuser";\r
  78     private static final String UNBOUND = "unbound";\r
  79     private static final String VPP_INTERFACE_NAME_PREFIX = "neutron_port_";\r
  80     private static final String TAP_PORT_NAME_PREFIX = "tap";\r
  81     private static final String RT_PORT_NAME_PREFIX = "qr-";\r
  82     private static final String VHOST_SOCKET_KEY = "vhostuser_socket";\r
  83     static final String DEFAULT_NODE = "default";\r
  84 \r
  85     private final NodeId routingNode;\r
  86     private BindingTransactionChain transactionChain;\r
  87     private DataBroker dataBroker;\r
  88 \r
  89     PortHandler(DataBroker dataBroker, NodeId routingNodeId) {\r
  90         this.dataBroker = dataBroker;\r
  91         this.routingNode = routingNodeId;\r
  92         transactionChain = this.dataBroker.createTransactionChain(this);\r
  93     }\r
  94 \r
  95     void processCreated(Port port) {\r
  96         ReadOnlyTransaction rTx = transactionChain.newReadOnlyTransaction();\r
  97         Optional<BaseEndpointByPort> optBaseEpByPort = DataStoreHelper.readFromDs(LogicalDatastoreType.OPERATIONAL,\r
  98                 createBaseEpByPortIid(port.getUuid()), rTx);\r
  99         rTx.close();\r
 100         if (!optBaseEpByPort.isPresent()) {\r
 101             return;\r
 102         }\r
 103         processCreatedData(port, optBaseEpByPort.get());\r
 104     }\r
 105 \r
 106     void processCreated(BaseEndpointByPort bebp) {\r
 107         ReadOnlyTransaction rTx = transactionChain.newReadOnlyTransaction();\r
 108         Optional<Port> optPort = DataStoreHelper.readFromDs(LogicalDatastoreType.CONFIGURATION,\r
 109                 createPortIid(bebp.getPortId()), rTx);\r
 110         rTx.close();\r
 111         if (!optPort.isPresent()) {\r
 112             return;\r
 113         }\r
 114         processCreatedData(optPort.get(), bebp);\r
 115     }\r
 116 \r
 117     @VisibleForTesting\r
 118     void processCreatedData(Port port, BaseEndpointByPort bebp) {\r
 119         if (isValidVhostUser(port)\r
 120                 // this is a hack for vpp router port\r
 121                 // Openstack does not send binding details yet\r
 122                 || isValidVppRouterPort(port)) {\r
 123             VppEndpoint vppEp = buildVppEndpoint(port, bebp);\r
 124             if (vppEp == null) {\r
 125                 LOG.warn("Cannot create vpp-endpoint from neutron port {}", port);\r
 126                 return;\r
 127             }\r
 128             writeVppEndpoint(createVppEndpointIid(vppEp.getKey()), vppEp);\r
 129             LOG.debug("Created vpp-endpoint {}", vppEp);\r
 130         }\r
 131     }\r
 132 \r
 133     private boolean isValidVhostUser(Port port) {\r
 134         PortBindingExtension portBindingExt = port.getAugmentation(PortBindingExtension.class);\r
 135         if (portBindingExt != null) {\r
 136             String vifType = portBindingExt.getVifType();\r
 137             String deviceOwner = port.getDeviceOwner();\r
 138             if (vifType != null && deviceOwner != null) {\r
 139                 if (vifType.contains(VHOST_USER)) {\r
 140                     for (String supportedDeviceOwner : SUPPORTED_DEVICE_OWNERS) {\r
 141                         if (deviceOwner.contains(supportedDeviceOwner)) {\r
 142                             return true;\r
 143                         }\r
 144                     }\r
 145                 }\r
 146             }\r
 147         }\r
 148         return false;\r
 149     }\r
 150 \r
 151     void processUpdated(Port original, Port delta) {\r
 152         if (!isUpdateNeeded(original, delta)){\r
 153             LOG.trace("Port update skipped, port didn`t change. before {}, after: {}" , original, delta);\r
 154             return;\r
 155         }\r
 156 \r
 157         LOG.trace("Updating port before: {}, after: {}" , original, delta);\r
 158         if (isValidVhostUser(original)) {\r
 159             ReadOnlyTransaction rTx = transactionChain.newReadOnlyTransaction();\r
 160             Optional<BaseEndpointByPort> optBebp = DataStoreHelper.readFromDs(LogicalDatastoreType.OPERATIONAL,\r
 161                     createBaseEpByPortIid(original.getUuid()), rTx);\r
 162             rTx.close();\r
 163             if (!optBebp.isPresent()) {\r
 164                 return;\r
 165             }\r
 166             LOG.trace("Updating port - deleting old port {}" , optBebp.get().getPortId());\r
 167             processDeleted(optBebp.get());\r
 168         }\r
 169         LOG.trace("Updating port - creating new port {}" , delta.getUuid());\r
 170         processCreated(delta);\r
 171     }\r
 172 \r
 173     private boolean isUpdateNeeded(final Port oldPort, final Port newPort) {\r
 174         //TODO fix this to better support update of ports for VPP\r
 175         final PortBindingExtension oldPortAugmentation = oldPort.getAugmentation(PortBindingExtension.class);\r
 176         final PortBindingExtension newPortAugmentation = newPort.getAugmentation(PortBindingExtension.class);\r
 177 \r
 178         if (newPortAugmentation == null) {\r
 179             LOG.trace("Port {} is no longer a vhost type port, updating port...");\r
 180             return true;\r
 181         }\r
 182 \r
 183         final String oldDeviceOwner = oldPort.getDeviceOwner();\r
 184         final String oldVifType = oldPortAugmentation.getVifType();\r
 185         final String newDeviceOwner = newPort.getDeviceOwner();\r
 186         final String newVifType = newPortAugmentation.getVifType();\r
 187 \r
 188         // TODO potential bug here\r
 189         // Temporary change for Openstack Mitaka: If old neutron-binding:vif-type is vhost, new one is unbound and\r
 190         // device owner is ROUTER_OWNER, skip update. Openstack (or ml2) sometimes sends router update messages in\r
 191         // incorrect order which causes unwanted port removal\r
 192         if (oldVifType.equals(VHOST_USER) && newVifType.equals(UNBOUND) && oldDeviceOwner != null &&\r
 193                 ROUTER_OWNER.equals(oldDeviceOwner) && ROUTER_OWNER.equals(newDeviceOwner)) {\r
 194             LOG.warn("Port vif-type was updated from vhost to unbound. This update is currently disabled and will be skipped");\r
 195             return false;\r
 196         }\r
 197 \r
 198         if (newVifType != null && !newVifType.equals(oldVifType)) {\r
 199             LOG.trace("Vif type changed, old: {} new {}", oldVifType, newVifType);\r
 200             return true;\r
 201         }\r
 202 \r
 203         final List<VifDetails> vifDetails = oldPortAugmentation.getVifDetails();\r
 204 \r
 205         if (!oldPortAugmentation.getHostId().equals(newPortAugmentation.getHostId()) ||\r
 206             nullToEmpty(vifDetails).size() != nullToEmpty(newPortAugmentation.getVifDetails()).size()) {\r
 207             return true;\r
 208         }\r
 209 \r
 210         for (VifDetails vifDetail : nullToEmpty(vifDetails)) {\r
 211             //check if vhostuser_socket, vhostuser_mode and port_filter are changed\r
 212             if (!newPortAugmentation.getVifDetails().contains(vifDetail))\r
 213                 return true;\r
 214         }\r
 215         return false;\r
 216     }\r
 217 \r
 218     void processDeleted(BaseEndpointByPort bebp) {\r
 219         LOG.trace("Deleting vpp-endpoint by BaseEndpointByPort {}" , bebp);\r
 220         VppEndpointKey vppEpKey = new VppEndpointKey(bebp.getAddress(), bebp.getAddressType(), bebp.getContextId(),\r
 221                 bebp.getContextType());\r
 222         InstanceIdentifier<VppEndpoint> vppEpIid = createVppEndpointIid(vppEpKey);\r
 223         ReadOnlyTransaction rTx = transactionChain.newReadOnlyTransaction();\r
 224         Optional<VppEndpoint> readVppEp = DataStoreHelper.readFromDs(LogicalDatastoreType.CONFIGURATION, vppEpIid, rTx);\r
 225         rTx.close();\r
 226         if (readVppEp.isPresent()) {\r
 227             writeVppEndpoint(vppEpIid, null);\r
 228             LOG.debug("Deleted vpp-endpoint {}", vppEpKey);\r
 229         }\r
 230     }\r
 231 \r
 232     private synchronized void writeVppEndpoint(InstanceIdentifier<VppEndpoint> vppEpIid, VppEndpoint vppEp) {\r
 233         WriteTransaction wTx = transactionChain.newWriteOnlyTransaction();\r
 234         if (vppEp != null) {\r
 235             wTx.put(LogicalDatastoreType.CONFIGURATION, vppEpIid, vppEp, true);\r
 236         } else {\r
 237             wTx.delete(LogicalDatastoreType.CONFIGURATION, vppEpIid);\r
 238         }\r
 239         wTx.submit();\r
 240     }\r
 241 \r
 242     @VisibleForTesting\r
 243     VppEndpoint buildVppEndpoint(Port port, BaseEndpointByPort bebp) {\r
 244         PortBindingExtension portBinding = port.getAugmentation(PortBindingExtension.class);\r
 245         VppEndpointBuilder vppEpBuilder = new VppEndpointBuilder().setDescription("neutron port")\r
 246             .setContextId(bebp.getContextId())\r
 247             .setContextType(bebp.getContextType())\r
 248             .setAddress(bebp.getAddress())\r
 249             .setAddressType(bebp.getAddressType())\r
 250             .setVppInterfaceName(VPP_INTERFACE_NAME_PREFIX + bebp.getPortId().getValue())\r
 251             .setVppNodeId(new NodeId(portBinding.getHostId()));\r
 252         if (port.getDeviceOwner().contains(COMPUTE_OWNER)) {\r
 253             vppEpBuilder.setInterfaceTypeChoice(\r
 254                 new VhostUserCaseBuilder().setSocket(getSocketFromPortBinding(portBinding)).build());\r
 255         } else if (port.getDeviceOwner().contains(DHCP_OWNER) && port.getMacAddress() != null) {\r
 256             TapCase tapCase = new TapCaseBuilder().setPhysicalAddress(new PhysAddress(port.getMacAddress().getValue()))\r
 257                 .setName(createPortName(port.getUuid()))\r
 258                 .build();\r
 259             vppEpBuilder.setInterfaceTypeChoice(tapCase);\r
 260         } else if (isValidQRouterPort(port)) {\r
 261             TapCase tapCase = new TapCaseBuilder().setPhysicalAddress(new PhysAddress(port.getMacAddress().getValue()))\r
 262                     .setName(createQRouterPortName(port.getUuid()))\r
 263                     .build();\r
 264             vppEpBuilder.setInterfaceTypeChoice(tapCase);\r
 265             vppEpBuilder.addAugmentation(ExcludeFromPolicy.class,\r
 266                     new ExcludeFromPolicyBuilder().setExcludeFromPolicy(true).build());\r
 267         } else if (isValidVppRouterPort(port)) {\r
 268             if (!DEFAULT_NODE.equals(routingNode.getValue())) {\r
 269                 LOG.warn(\r
 270                         "Host-id changed by ODL for port {}. This is a supplementary workaround for choosing a routing node.",\r
 271                         port);\r
 272                 vppEpBuilder.setVppNodeId(routingNode);\r
 273             } else if (port.getDeviceId() != null) {\r
 274                 LOG.debug("Resolving host-id for unbound router port {}", port.getUuid());\r
 275                 ReadOnlyTransaction readTx = dataBroker.newReadOnlyTransaction();\r
 276                 Optional<Ports> optPorts = DataStoreHelper.readFromDs(LogicalDatastoreType.CONFIGURATION,\r
 277                         InstanceIdentifier.builder(Neutron.class).child(Ports.class).build(), readTx);\r
 278                 readTx.close();\r
 279                 if (optPorts.isPresent() && optPorts.get().getPort() != null) {\r
 280                     java.util.Optional<Port> optPortOnTheSameNode = optPorts.get()\r
 281                         .getPort()\r
 282                         .stream()\r
 283                         .filter(p -> !p.getUuid().equals(port.getUuid()))\r
 284                         .filter(p -> p.getAugmentation(PortBindingExtension.class) != null)\r
 285                         .filter(p -> p.getDeviceOwner().contains(DHCP_OWNER))\r
 286                         .findFirst();\r
 287                     if (optPortOnTheSameNode.isPresent()) {\r
 288                         PortBindingExtension binding =\r
 289                                 optPortOnTheSameNode.get().getAugmentation(PortBindingExtension.class);\r
 290                         if (binding != null && binding.getHostId() != null) {\r
 291                             vppEpBuilder.setVppNodeId(new NodeId(binding.getHostId()));\r
 292                         } else {\r
 293                             LOG.warn("Cannot resolve location of router-port {}", port.getUuid());\r
 294                             return null;\r
 295                         }\r
 296                     }\r
 297                 }\r
 298             }\r
 299             vppEpBuilder.addAugmentation(ExcludeFromPolicy.class,\r
 300                     new ExcludeFromPolicyBuilder().setExcludeFromPolicy(true).build());\r
 301             vppEpBuilder.setInterfaceTypeChoice(getLoopbackCase(port));\r
 302         }\r
 303         return vppEpBuilder.build();\r
 304     }\r
 305 \r
 306     private String getSocketFromPortBinding(@Nonnull PortBindingExtension portBindingExtension) {\r
 307         List<VifDetails> vifDetails = nullToEmpty(portBindingExtension.getVifDetails());\r
 308 \r
 309         for (VifDetails detail : vifDetails) {\r
 310             if (VHOST_SOCKET_KEY.equalsIgnoreCase(detail.getDetailsKey())) {\r
 311                 return detail.getValue();\r
 312             }\r
 313         }\r
 314         return null;\r
 315     }\r
 316 \r
 317     private LoopbackCase getLoopbackCase(Port port) {\r
 318         LoopbackCaseBuilder loopbackCase = new LoopbackCaseBuilder()\r
 319             .setPhysAddress(new PhysAddress(port.getMacAddress().getValue()));\r
 320         Optional<FixedIps> fixedIpsOptional = resolveFirstFixedIps(port);\r
 321         if(fixedIpsOptional.isPresent() && fixedIpsOptional.get().getIpAddress() != null){\r
 322             loopbackCase.setIpAddress(fixedIpsOptional.get().getIpAddress());\r
 323             ReadOnlyTransaction rTx = transactionChain.newReadOnlyTransaction();\r
 324             Optional<Subnet> subnetOptional =\r
 325                 DataStoreHelper.readFromDs(LogicalDatastoreType.CONFIGURATION,\r
 326                     InstanceIdentifier.builder(Neutron.class)\r
 327                         .child(Subnets.class)\r
 328                         .child(Subnet.class, new SubnetKey(fixedIpsOptional.get().getSubnetId()))\r
 329                         .build(), rTx);\r
 330             if (subnetOptional.isPresent()) {\r
 331                 Ipv4Prefix ipv4Prefix = subnetOptional.get().getCidr().getIpv4Prefix();\r
 332                 loopbackCase.setIpPrefix(new IpPrefix(ipv4Prefix));\r
 333             } else {\r
 334                 LOG.warn("IpPrefix for loopback port: {} was not set.", port);\r
 335             }\r
 336             if (loopbackCase.getIpAddress() != null && loopbackCase.getIpPrefix() != null) {\r
 337                 loopbackCase.setBvi(true);\r
 338                 LOG.trace("Creating loopback BVI interface: {} for VPP router port: {}.", loopbackCase, port);\r
 339             }\r
 340 \r
 341         } else {\r
 342             LOG.warn("IpAddress for loopback port: {} was not set.", port);\r
 343         }\r
 344         return loopbackCase.build();\r
 345     }\r
 346 \r
 347     /**\r
 348      * If Qrouter (L3 Agent) is in use, any of Openstack neutron routers is not going be mapped\r
 349      * to ODL neutron.\r
 350      */\r
 351     private boolean isValidQRouterPort(Port port) {\r
 352         Optional<Router> optRouter = getRouterOptional(port);\r
 353         return !optRouter.isPresent() && port.getDeviceOwner().contains(ROUTER_OWNER)\r
 354                 && port.getMacAddress() != null;\r
 355     }\r
 356 \r
 357     private boolean isValidVppRouterPort(Port port) {\r
 358         Optional<Router> optRouter = getRouterOptional(port);\r
 359         return optRouter.isPresent() && port.getDeviceOwner().contains(ROUTER_OWNER)\r
 360             && port.getMacAddress() != null;\r
 361     }\r
 362 \r
 363     private Optional<Router> getRouterOptional(Port port) {\r
 364         if (Strings.isNullOrEmpty(port.getDeviceId())) {\r
 365             return Optional.absent();\r
 366         }\r
 367         RouterKey routerKey = null;\r
 368         try {\r
 369             routerKey = new RouterKey(new Uuid(port.getDeviceId()));\r
 370         } catch (IllegalArgumentException e) {\r
 371             // port.getDeviceId() may not match Uuid.PATTERN_CONSTANTS\r
 372             return Optional.absent();\r
 373         }\r
 374         ReadOnlyTransaction rTx = transactionChain.newReadOnlyTransaction();\r
 375         InstanceIdentifier<Router> routerIid = InstanceIdentifier.builder(Neutron.class)\r
 376             .child(Routers.class)\r
 377             .child(Router.class, routerKey)\r
 378             .build();\r
 379         Optional<Router> optRouter = DataStoreHelper.readFromDs(LogicalDatastoreType.CONFIGURATION, routerIid, rTx);\r
 380         rTx.close();\r
 381         return optRouter;\r
 382     }\r
 383 \r
 384     public static Optional<FixedIps> resolveFirstFixedIps(Port port) {\r
 385         List<FixedIps> fixedIps = port.getFixedIps();\r
 386         if (fixedIps != null && !fixedIps.isEmpty()) {\r
 387             return Optional.of(fixedIps.get(0));\r
 388         }\r
 389         return Optional.absent();\r
 390     }\r
 391 \r
 392     private String createPortName(Uuid portUuid) {\r
 393         String tapPortName;\r
 394         String uuid = portUuid.getValue();\r
 395         if (uuid != null && uuid.length() >= 12) {\r
 396             tapPortName = TAP_PORT_NAME_PREFIX + uuid.substring(0, 11);\r
 397         } else {\r
 398             tapPortName = TAP_PORT_NAME_PREFIX + uuid;\r
 399         }\r
 400         return tapPortName;\r
 401     }\r
 402 \r
 403     private String createQRouterPortName(Uuid portUuid) {\r
 404         String tapPortName;\r
 405         String uuid = portUuid.getValue();\r
 406         if (uuid != null && uuid.length() >= 12) {\r
 407             tapPortName = RT_PORT_NAME_PREFIX + uuid.substring(0, 11);\r
 408         } else {\r
 409             tapPortName = RT_PORT_NAME_PREFIX + uuid;\r
 410         }\r
 411         return tapPortName;\r
 412     }\r
 413 \r
 414     private InstanceIdentifier<VppEndpoint> createVppEndpointIid(VppEndpointKey vppEpKey) {\r
 415         return InstanceIdentifier.builder(Config.class).child(VppEndpoint.class, vppEpKey).build();\r
 416     }\r
 417 \r
 418     private InstanceIdentifier<BaseEndpointByPort> createBaseEpByPortIid(Uuid uuid) {\r
 419         return createBaseEpByPortIid(new UniqueId(uuid.getValue()));\r
 420     }\r
 421 \r
 422     private InstanceIdentifier<BaseEndpointByPort> createBaseEpByPortIid(UniqueId uuid) {\r
 423         return InstanceIdentifier.builder(Mappings.class)\r
 424             .child(GbpByNeutronMappings.class)\r
 425             .child(BaseEndpointsByPorts.class)\r
 426             .child(BaseEndpointByPort.class, new BaseEndpointByPortKey(uuid))\r
 427             .build();\r
 428     }\r
 429 \r
 430     InstanceIdentifier<Port> createWildcartedPortIid() {\r
 431         return portsIid().child(Port.class).build();\r
 432     }\r
 433 \r
 434     private InstanceIdentifier<Port> createPortIid(UniqueId uuid) {\r
 435         return portsIid().child(Port.class, new PortKey(new Uuid(uuid.getValue()))).build();\r
 436     }\r
 437 \r
 438     private InstanceIdentifierBuilder<Ports> portsIid() {\r
 439         return InstanceIdentifier.builder(Neutron.class).child(Ports.class);\r
 440     }\r
 441 \r
 442     @Override\r
 443     public void onTransactionChainFailed(TransactionChain<?, ?> chain, AsyncTransaction<?, ?> transaction,\r
 444             Throwable cause) {\r
 445         LOG.error("Transaction chain failed. {} \nTransaction which caused the chain to fail {}", cause.getMessage(),\r
 446                 transaction, cause);\r
 447         transactionChain.close();\r
 448         transactionChain = dataBroker.createTransactionChain(this);\r
 449     }\r
 450 \r
 451     @Override\r
 452     public void onTransactionChainSuccessful(TransactionChain<?, ?> chain) {\r
 453         LOG.trace("Transaction chain was successful. {}", chain);\r
 454     }\r
 455 \r
 456     private <T> List<T> nullToEmpty(@Nullable List<T> list) {\r
 457         return list == null ? Collections.emptyList() : list;\r
 458     }\r
 459 }\r