interfacemanager/interfacemanager-impl/src/main/java/org/opendaylight/genius/interfacemanager/servicebindings/flowbased/config/helpers/FlowBasedEgressServicesConfigUnbindHelper.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.interfacemanager.servicebindings.flowbased.config.helpers;
   9
  10 import com.google.common.util.concurrent.ListenableFuture;
  11 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  12 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
  13 import org.opendaylight.genius.interfacemanager.IfmConstants;
  14 import org.opendaylight.genius.interfacemanager.InterfacemgrProvider;
  15 import org.opendaylight.genius.interfacemanager.commons.InterfaceManagerCommonUtils;
  16 import org.opendaylight.genius.interfacemanager.servicebindings.flowbased.config.factory.FlowBasedServicesConfigRemovable;
  17 import org.opendaylight.genius.interfacemanager.servicebindings.flowbased.utilities.FlowBasedServicesUtils;
  18 import org.opendaylight.genius.mdsalutil.NwConstants;
  19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.iana._if.type.rev140508.L2vlan;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.iana._if.type.rev140508.Tunnel;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface.OperStatus;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.ServiceModeBase;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.ServicesInfo;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.servicebinding.rev160406.service.bindings.services.info.BoundServices;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 import java.math.BigInteger;
  30 import java.util.ArrayList;
  31 import java.util.List;
  32
  33 public class FlowBasedEgressServicesConfigUnbindHelper implements FlowBasedServicesConfigRemovable {
  34     private static final Logger LOG = LoggerFactory.getLogger(FlowBasedEgressServicesConfigUnbindHelper.class);
  35
  36     private InterfacemgrProvider interfaceMgrProvider;
  37     private static volatile FlowBasedServicesConfigRemovable flowBasedEgressServicesRemovable;
  38
  39     private FlowBasedEgressServicesConfigUnbindHelper(InterfacemgrProvider interfaceMgrProvider) {
  40         this.interfaceMgrProvider = interfaceMgrProvider;
  41     }
  42
  43     public static void intitializeFlowBasedEgressServicesConfigRemoveHelper(InterfacemgrProvider interfaceMgrProvider) {
  44         if (flowBasedEgressServicesRemovable == null) {
  45             synchronized (FlowBasedEgressServicesConfigUnbindHelper.class) {
  46                 if (flowBasedEgressServicesRemovable == null) {
  47                     flowBasedEgressServicesRemovable = new FlowBasedEgressServicesConfigUnbindHelper(interfaceMgrProvider);
  48                 }
  49             }
  50         }
  51     }
  52
  53     public static FlowBasedServicesConfigRemovable getFlowBasedEgressServicesRemoveHelper() {
  54         if (flowBasedEgressServicesRemovable == null) {
  55             LOG.error("FlowBasedIngressBindHelper`` is not initialized");
  56         }
  57         return flowBasedEgressServicesRemovable;
  58     }
  59
  60     public List<ListenableFuture<Void>> unbindService(InstanceIdentifier<BoundServices> instanceIdentifier,
  61                                                              BoundServices boundServiceOld) {
  62         List<ListenableFuture<Void>> futures = new ArrayList<>();
  63         DataBroker dataBroker = interfaceMgrProvider.getDataBroker();
  64         String interfaceName =
  65                 InstanceIdentifier.keyOf(instanceIdentifier.firstIdentifierOf(ServicesInfo.class)).getInterfaceName();
  66         Class<? extends ServiceModeBase> serviceMode = InstanceIdentifier.keyOf(instanceIdentifier.firstIdentifierOf(ServicesInfo.class)).getServiceMode();
  67
  68         // Get the Parent ServiceInfo
  69         ServicesInfo servicesInfo = FlowBasedServicesUtils.getServicesInfoForInterface(interfaceName, serviceMode, dataBroker);
  70         if (servicesInfo == null) {
  71             LOG.error("Reached Impossible part in the code for bound service: {}", boundServiceOld);
  72             return futures;
  73         }
  74
  75         org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface ifState =
  76                 InterfaceManagerCommonUtils.getInterfaceStateFromOperDS(interfaceName, dataBroker);
  77         if (ifState == null || ifState.getOperStatus() == OperStatus.Down) {
  78             LOG.info("Not unbinding Service since operstatus is DOWN for Interface: {}", interfaceName);
  79             return futures;
  80         }
  81         List<BoundServices> boundServices = servicesInfo.getBoundServices();
  82
  83         // Split based on type of interface....
  84         if (ifState.getType().isAssignableFrom(L2vlan.class)) {
  85             return unbindServiceOnVlan(boundServiceOld, boundServices, ifState, dataBroker);
  86         } else if (ifState.getType().isAssignableFrom(Tunnel.class)) {
  87             return unbindServiceOnTunnel(boundServiceOld, boundServices, ifState, dataBroker);
  88         }
  89         return futures;
  90     }
  91
  92     private static List<ListenableFuture<Void>> unbindServiceOnVlan(
  93             BoundServices boundServiceOld,
  94             List<BoundServices> boundServices, org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface ifaceState,
  95             DataBroker dataBroker) {
  96
  97         List<ListenableFuture<Void>> futures = new ArrayList<>();
  98         WriteTransaction t = dataBroker.newWriteOnlyTransaction();
  99         BigInteger dpId = FlowBasedServicesUtils.getDpnIdFromInterface(ifaceState);
 100         if (boundServices.isEmpty()) {
 101             // Remove default entry from Lport Dispatcher Table.
 102             FlowBasedServicesUtils.removeEgressDispatcherFlow(dpId, ifaceState.getName(), boundServiceOld, t, NwConstants.DEFAULT_SERVICE_INDEX);
 103             if (t != null) {
 104                 futures.add(t.submit());
 105             }
 106             return futures;
 107         }
 108         BoundServices[] highLow = FlowBasedServicesUtils.getHighAndLowPriorityService(boundServices, boundServiceOld);
 109         BoundServices low = highLow[0];
 110         BoundServices high = highLow[1];
 111         // This means the one removed was the highest priority service
 112         if (high == null) {
 113             FlowBasedServicesUtils.removeEgressDispatcherFlow(dpId, ifaceState.getName(), boundServiceOld, t, NwConstants.DEFAULT_SERVICE_INDEX);
 114             if (low != null) {
 115                 //delete the lower services flow entry.
 116                 FlowBasedServicesUtils.removeEgressDispatcherFlow(dpId, ifaceState.getName(), low, t, low.getServicePriority());
 117                 BoundServices lower = FlowBasedServicesUtils.getHighAndLowPriorityService(boundServices, low)[0];
 118                 short lowerServiceIndex = (short) ((lower!=null) ? lower.getServicePriority() : low.getServicePriority() + 1);
 119                 FlowBasedServicesUtils.installEgressDispatcherFlow(dpId, low, ifaceState.getName(), t, ifaceState.getIfIndex(), NwConstants.DEFAULT_SERVICE_INDEX, lowerServiceIndex);
 120             }
 121         } else {
 122             FlowBasedServicesUtils.removeEgressDispatcherFlow(dpId, ifaceState.getName(), boundServiceOld, t, boundServiceOld.getServicePriority());
 123             short lowerServiceIndex = (short) ((low!=null) ? low.getServicePriority() : boundServiceOld.getServicePriority() + 1);
 124             BoundServices highest = FlowBasedServicesUtils.getHighestPriorityService(boundServices);
 125             if (high.equals(highest)) {
 126                 FlowBasedServicesUtils.installEgressDispatcherFlow(dpId, high, ifaceState.getName(),t, ifaceState.getIfIndex(), NwConstants.DEFAULT_SERVICE_INDEX, lowerServiceIndex);
 127             } else {
 128                 FlowBasedServicesUtils.installEgressDispatcherFlow(dpId, high, ifaceState.getName(),t, ifaceState.getIfIndex(), high.getServicePriority(), lowerServiceIndex);
 129             }
 130         }
 131         futures.add(t.submit());
 132         return futures;
 133     }
 134
 135     private static List<ListenableFuture<Void>> unbindServiceOnTunnel(
 136             BoundServices boundServiceOld,
 137             List<BoundServices> boundServices, org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface ifState,
 138             DataBroker dataBroker) {
 139         List<ListenableFuture<Void>> futures = new ArrayList<>();
 140
 141         // FIXME : not yet supported
 142         return futures;
 143     }
 144 }