/*
* Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Optional;
import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
import org.opendaylight.groupbasedpolicy.dto.EgKey;
import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.OfContext;
import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.OfWriter;
import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.endpoint.EndpointManager;
import org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.OrdinalFactory.EndpointFwdCtxOrdinals;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.Action;
import org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.list.ActionBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.BucketId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.GroupId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group.buckets.BucketBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.L2FloodDomainId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.SubnetId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.Endpoint;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.ofoverlay.rev140528.OfOverlayContext;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.ofoverlay.rev140528.Segmentation;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.forwarding.context.L2FloodDomain;
import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.policy.rev140421.tenants.tenant.forwarding.context.Subnet;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeConnectorId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.overlay.rev150105.TunnelTypeVxlan;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import static org.opendaylight.groupbasedpolicy.renderer.ofoverlay.flow.FlowUtils.*;
/**
* Manage the group tables for handling broadcast/multicast
*/
public class GroupTable extends OfTable {
private static final Logger LOG = LoggerFactory.getLogger(GroupTable.class);
public GroupTable(OfContext ctx) {
super(ctx);
}
@Override
public void sync(Endpoint endpoint, OfWriter ofWriter) throws Exception {
NodeId endpointNodeId = ctx.getEndpointManager().getEndpointNodeId(endpoint);
if (endpointNodeId == null) {
LOG.warn("Endpoint {} has no location specified, skipped", endpoint);
return;
}
// there appears to be no way of getting only the existing group
// tables unfortunately, so we have to get the whole node.
// Since this is happening concurrently with other things that are
// working in subtrees of nodes, we have to do two transactions
FlowCapableNode fcn = getFCNodeFromDatastore(endpointNodeId);
if (fcn == null)
return;
EndpointFwdCtxOrdinals ordinals = OrdinalFactory.getEndpointFwdCtxOrdinals(ctx, endpoint);
if (ordinals == null) {
LOG.info("getEndpointFwdCtxOrdinals is null for EP {}", endpoint);
return;
}
GroupId groupId = new GroupId(Long.valueOf(ordinals.getFdId()));
if (!ofWriter.groupExists(endpointNodeId, groupId.getValue())) {
LOG.info("createGroup {} {}", endpointNodeId, groupId);
ofWriter.writeGroup(endpointNodeId, groupId);
}
syncGroups(endpointNodeId, ordinals, endpoint, groupId, ofWriter);
}
@VisibleForTesting
void syncGroups(NodeId nodeId, EndpointFwdCtxOrdinals ordinals, Endpoint endpoint, GroupId groupId,
OfWriter ofWriter) throws Exception {
for (EgKey endpointGroupKey : ctx.getEndpointManager().getGroupsForNode(nodeId)) {
// we'll use the fdId with the high bit set for remote bucket
// and just the local port number for local bucket
for (NodeId destinationNode : findPeerNodesForGroup(endpointGroupKey)) {
if (nodeId.equals(destinationNode))
continue;
if (isFloodDomainOnNode(ordinals.getFdId(), destinationNode)) {
Long bucketId;
try {
bucketId = (long) OrdinalFactory.getContextOrdinal(destinationNode);
} catch (Exception e) {
LOG.error("Error during getting of context ordinal, node: {}", destinationNode);
continue;
}
bucketId |= 1L << 31;
IpAddress tunDst = ctx.getSwitchManager().getTunnelIP(destinationNode, TunnelTypeVxlan.class);
NodeConnectorId tunPort = ctx.getSwitchManager().getTunnelPort(nodeId, TunnelTypeVxlan.class);
if (tunDst == null || tunPort == null)
continue;
Action tunDstAction;
if (tunDst.getIpv4Address() != null) {
String nextHop = tunDst.getIpv4Address().getValue();
tunDstAction = nxLoadTunIPv4Action(nextHop, true);
} else {
LOG.error("IPv6 tunnel destination {} for {} not supported", tunDst.getIpv6Address().getValue(),
destinationNode);
continue;
}
BucketBuilder bucketBuilder = new BucketBuilder().setBucketId(new BucketId(bucketId))
.setAction(actionList(tunDstAction, outputAction(tunPort)));
ofWriter.writeBucket(nodeId, groupId, bucketBuilder.build());
}
}
// TODO broadcasts are not separated by EPG between endpoints on the same node
OfOverlayContext ofc = endpoint.getAugmentation(OfOverlayContext.class);
if (EndpointManager.isExternal(endpoint, ctx.getTenant(endpoint.getTenant()).getExternalImplicitGroups()))
continue;
long bucketId;
try {
bucketId = getOfPortNum(ofc.getNodeConnectorId());
} catch (NumberFormatException e) {
LOG.warn("Could not parse port number {}", ofc.getNodeConnectorId(), e);
continue;
}
Action output = outputAction(ofc.getNodeConnectorId());
BucketBuilder bb = new BucketBuilder().setBucketId(new BucketId(bucketId)).setAction(
FlowUtils.actionList(output));
ofWriter.writeBucket(nodeId, groupId, bb.build());
// if broadcast exceeds internal domain
for (Endpoint extEp : ctx.getEndpointManager().getExtEpsNoLocForGroup(endpointGroupKey)) {
if (extEp.getNetworkContainment() != null
&& extEp.getNetworkContainment().equals(endpoint.getNetworkContainment())) {
Subnet subnet = ctx.getTenant(extEp.getTenant()).resolveSubnet(new SubnetId(extEp.getNetworkContainment()));
L2FloodDomain l2Fd = ctx.getTenant(extEp.getTenant())
.resolveL2FloodDomain(new L2FloodDomainId(subnet.getParent().getValue()));
if (l2Fd != null) {
Segmentation segmentation = l2Fd.getAugmentation(Segmentation.class);
// external endpoints do not have location augmentation
// however they are beyond external ports
for (NodeConnectorId extNcId : ctx.getSwitchManager().getExternalPorts(nodeId)) {
try {
bucketId = getOfPortNum(extNcId);
} catch (NumberFormatException e) {
LOG.warn("Could not parse external port number {}", extNcId, e);
continue;
}
ArrayList<org.opendaylight.yang.gen.v1.urn.opendaylight.action.types.rev131112.action.list.ActionBuilder>
actionList = new ArrayList<>();
if (segmentation != null) {
Integer vlanId = segmentation.getSegmentationId();
actionList.addAll(FlowUtils.pushVlanActions(vlanId));
actionList.add(new ActionBuilder().setOrder(2).setAction(outputAction(extNcId)));
} else {
actionList.add(new ActionBuilder().setOrder(0).setAction(outputAction(extNcId)));
}
bb.setBucketId(new BucketId(bucketId)).setAction(
FlowUtils.actionList(actionList));
ofWriter.writeBucket(nodeId, groupId, bb.build());
}
}
}
}
}
}
/**
* @param sourceEpgKey a key of source group
* @return all the nodes on which endpoints are either in groups that have policy with source
* group, or are in the source group
*/
private Set<NodeId> findPeerNodesForGroup(EgKey sourceEpgKey) {
Set<NodeId> nodes = new HashSet<>();
nodes.addAll(ctx.getEndpointManager().getNodesForGroup(sourceEpgKey));
for (EgKey dstEpGroups : ctx.getCurrentPolicy().getPeers(sourceEpgKey)) {
nodes.addAll(ctx.getEndpointManager().getNodesForGroup(dstEpGroups));
}
return nodes;
}
private boolean isFloodDomainOnNode(int fdId, NodeId node) throws Exception {
for (Endpoint endpoint : ctx.getEndpointManager().getEndpointsForNode(node)) {
EndpointFwdCtxOrdinals endpointFwdCtxOrdinals = OrdinalFactory.getEndpointFwdCtxOrdinals(ctx, endpoint);
if (endpointFwdCtxOrdinals == null) {
continue;
}
int epFdId = endpointFwdCtxOrdinals.getFdId();
if (fdId == epFdId) {
return true;
}
}
return false;
}
private FlowCapableNode getFCNodeFromDatastore(NodeId nodeId)
throws ExecutionException, InterruptedException {
ReadOnlyTransaction t = ctx.getDataBroker().newReadOnlyTransaction();
InstanceIdentifier<FlowCapableNode> fcnIid = createNodePath(nodeId).builder()
.augmentation(FlowCapableNode.class).build();
Optional<FlowCapableNode> r = t.read(LogicalDatastoreType.OPERATIONAL, fcnIid).get();
if (!r.isPresent()) {
LOG.warn("Node {} is not present", fcnIid);
return null;
}
FlowCapableNode fcn = r.get();
t.close();
return fcn;
}
}