| package org.onosproject.driver.pipeline; |
| |
| import com.google.common.cache.Cache; |
| import com.google.common.cache.CacheBuilder; |
| import com.google.common.cache.RemovalCause; |
| import com.google.common.cache.RemovalNotification; |
| import org.onlab.osgi.ServiceDirectory; |
| import org.onlab.packet.MacAddress; |
| import org.onlab.packet.MplsLabel; |
| import org.onlab.packet.VlanId; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.DefaultGroupId; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.PortNumber; |
| import org.onosproject.net.behaviour.NextGroup; |
| import org.onosproject.net.behaviour.PipelinerContext; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.flow.criteria.Criterion; |
| import org.onosproject.net.flow.criteria.VlanIdCriterion; |
| import org.onosproject.net.flow.instructions.Instruction; |
| import org.onosproject.net.flow.instructions.Instructions; |
| import org.onosproject.net.flow.instructions.L2ModificationInstruction; |
| import org.onosproject.net.flowobjective.FlowObjectiveStore; |
| import org.onosproject.net.flowobjective.NextObjective; |
| import org.onosproject.net.flowobjective.ObjectiveError; |
| import org.onosproject.net.group.DefaultGroupBucket; |
| import org.onosproject.net.group.DefaultGroupDescription; |
| import org.onosproject.net.group.DefaultGroupKey; |
| import org.onosproject.net.group.Group; |
| import org.onosproject.net.group.GroupBucket; |
| import org.onosproject.net.group.GroupBuckets; |
| import org.onosproject.net.group.GroupDescription; |
| import org.onosproject.net.group.GroupEvent; |
| import org.onosproject.net.group.GroupKey; |
| import org.onosproject.net.group.GroupListener; |
| import org.onosproject.net.group.GroupService; |
| import org.onosproject.store.service.AtomicCounter; |
| import org.onosproject.store.service.StorageService; |
| import org.slf4j.Logger; |
| |
| import java.util.ArrayDeque; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Deque; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.stream.Collectors; |
| |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Group handler for OFDPA2 pipeline. |
| */ |
| public class OFDPA2GroupHandler { |
| /* |
| * OFDPA requires group-id's to have a certain form. |
| * L2 Interface Groups have <4bits-0><12bits-vlanid><16bits-portid> |
| * L3 Unicast Groups have <4bits-2><28bits-index> |
| * MPLS Interface Groups have <4bits-9><4bits:0><24bits-index> |
| * L3 ECMP Groups have <4bits-7><28bits-index> |
| * L2 Flood Groups have <4bits-4><12bits-vlanid><16bits-index> |
| * L3 VPN Groups have <4bits-9><4bits-2><24bits-index> |
| */ |
| private static final int L2_INTERFACE_TYPE = 0x00000000; |
| private static final int L3_UNICAST_TYPE = 0x20000000; |
| private static final int MPLS_INTERFACE_TYPE = 0x90000000; |
| private static final int MPLS_L3VPN_SUBTYPE = 0x92000000; |
| private static final int L3_ECMP_TYPE = 0x70000000; |
| private static final int L2_FLOOD_TYPE = 0x40000000; |
| |
| private static final int TYPE_MASK = 0x0fffffff; |
| private static final int SUBTYPE_MASK = 0x00ffffff; |
| |
| private static final int PORT_LOWER_BITS_MASK = 0x3f; |
| private static final long PORT_HIGHER_BITS_MASK = ~PORT_LOWER_BITS_MASK; |
| |
| private final Logger log = getLogger(getClass()); |
| private ServiceDirectory serviceDirectory; |
| protected GroupService groupService; |
| protected StorageService storageService; |
| |
| private DeviceId deviceId; |
| private FlowObjectiveStore flowObjectiveStore; |
| private Cache<GroupKey, List<OfdpaNextGroup>> pendingNextObjectives; |
| private ConcurrentHashMap<GroupKey, Set<GroupChainElem>> pendingGroups; |
| private ScheduledExecutorService groupChecker = |
| Executors.newScheduledThreadPool(2, groupedThreads("onos/pipeliner", "ofdpa2-%d")); |
| |
| // index number for group creation |
| private AtomicCounter nextIndex; |
| |
| // local stores for port-vlan mapping |
| protected Map<PortNumber, VlanId> port2Vlan = new ConcurrentHashMap<>(); |
| protected Map<VlanId, Set<PortNumber>> vlan2Port = new ConcurrentHashMap<>(); |
| |
| // local store for pending bucketAdds - by design there can only be one |
| // pending bucket for a group |
| protected ConcurrentHashMap<Integer, NextObjective> pendingBuckets = new ConcurrentHashMap<>(); |
| |
| protected void init(DeviceId deviceId, PipelinerContext context) { |
| this.deviceId = deviceId; |
| this.flowObjectiveStore = context.store(); |
| this.serviceDirectory = context.directory(); |
| this.groupService = serviceDirectory.get(GroupService.class); |
| this.storageService = serviceDirectory.get(StorageService.class); |
| this.nextIndex = storageService.atomicCounterBuilder() |
| .withName("group-id-index-counter") |
| .build() |
| .asAtomicCounter(); |
| |
| pendingNextObjectives = CacheBuilder.newBuilder() |
| .expireAfterWrite(20, TimeUnit.SECONDS) |
| .removalListener(( |
| RemovalNotification<GroupKey, List<OfdpaNextGroup>> notification) -> { |
| if (notification.getCause() == RemovalCause.EXPIRED) { |
| notification.getValue().forEach(ofdpaNextGrp -> |
| OFDPA2Pipeline.fail(ofdpaNextGrp.nextObj, |
| ObjectiveError.GROUPINSTALLATIONFAILED)); |
| |
| } |
| }).build(); |
| pendingGroups = new ConcurrentHashMap<>(); |
| groupChecker.scheduleAtFixedRate(new GroupChecker(), 0, 500, TimeUnit.MILLISECONDS); |
| |
| groupService.addListener(new InnerGroupListener()); |
| } |
| |
| ////////////////////////////////////// |
| // Group Creation |
| ////////////////////////////////////// |
| |
| protected void addGroup(NextObjective nextObjective) { |
| switch (nextObjective.type()) { |
| case SIMPLE: |
| Collection<TrafficTreatment> treatments = nextObjective.next(); |
| if (treatments.size() != 1) { |
| log.error("Next Objectives of type Simple should only have a " |
| + "single Traffic Treatment. Next Objective Id:{}", |
| nextObjective.id()); |
| OFDPA2Pipeline.fail(nextObjective, ObjectiveError.BADPARAMS); |
| return; |
| } |
| processSimpleNextObjective(nextObjective); |
| break; |
| case BROADCAST: |
| processBroadcastNextObjective(nextObjective); |
| break; |
| case HASHED: |
| processHashedNextObjective(nextObjective); |
| break; |
| case FAILOVER: |
| OFDPA2Pipeline.fail(nextObjective, ObjectiveError.UNSUPPORTED); |
| log.warn("Unsupported next objective type {}", nextObjective.type()); |
| break; |
| default: |
| OFDPA2Pipeline.fail(nextObjective, ObjectiveError.UNKNOWN); |
| log.warn("Unknown next objective type {}", nextObjective.type()); |
| } |
| } |
| |
| /** |
| * As per the OFDPA 2.0 TTP, packets are sent out of ports by using |
| * a chain of groups. The simple Next Objective passed |
| * in by the application has to be broken up into a group chain |
| * comprising of an L3 Unicast Group that points to an L2 Interface |
| * Group which in-turn points to an output port. In some cases, the simple |
| * next Objective can just be an L2 interface without the need for chaining. |
| * |
| * @param nextObj the nextObjective of type SIMPLE |
| */ |
| private void processSimpleNextObjective(NextObjective nextObj) { |
| TrafficTreatment treatment = nextObj.next().iterator().next(); |
| // determine if plain L2 or L3->L2 |
| boolean plainL2 = true; |
| for (Instruction ins : treatment.allInstructions()) { |
| if (ins.type() == Instruction.Type.L2MODIFICATION) { |
| L2ModificationInstruction l2ins = (L2ModificationInstruction) ins; |
| if (l2ins.subtype() == L2ModificationInstruction.L2SubType.ETH_DST || |
| l2ins.subtype() == L2ModificationInstruction.L2SubType.ETH_SRC) { |
| plainL2 = false; |
| break; |
| } |
| } |
| } |
| |
| if (plainL2) { |
| createL2InterfaceGroup(nextObj); |
| return; |
| } |
| |
| // break up simple next objective to GroupChain objects |
| GroupInfo groupInfo = createL2L3Chain(treatment, nextObj.id(), |
| nextObj.appId(), false, |
| nextObj.meta()); |
| if (groupInfo == null) { |
| log.error("Could not process nextObj={} in dev:{}", nextObj.id(), deviceId); |
| return; |
| } |
| // create object for local and distributed storage |
| Deque<GroupKey> gkeyChain = new ArrayDeque<>(); |
| gkeyChain.addFirst(groupInfo.innerGrpDesc.appCookie()); |
| gkeyChain.addFirst(groupInfo.outerGrpDesc.appCookie()); |
| OfdpaNextGroup ofdpaGrp = new OfdpaNextGroup( |
| Collections.singletonList(gkeyChain), |
| nextObj); |
| |
| // store l3groupkey with the ofdpaNextGroup for the nextObjective that depends on it |
| updatePendingNextObjective(groupInfo.outerGrpDesc.appCookie(), ofdpaGrp); |
| |
| // now we are ready to send the l2 groupDescription (inner), as all the stores |
| // that will get async replies have been updated. By waiting to update |
| // the stores, we prevent nasty race conditions. |
| groupService.addGroup(groupInfo.innerGrpDesc); |
| } |
| |
| /** |
| * Creates a simple L2 Interface Group. |
| * |
| * @param nextObj the next Objective |
| */ |
| private void createL2InterfaceGroup(NextObjective nextObj) { |
| // only allowed actions are vlan pop and outport |
| TrafficTreatment.Builder ttb = DefaultTrafficTreatment.builder(); |
| PortNumber portNum = null; |
| for (Instruction ins : nextObj.next().iterator().next().allInstructions()) { |
| if (ins.type() == Instruction.Type.L2MODIFICATION) { |
| L2ModificationInstruction l2ins = (L2ModificationInstruction) ins; |
| switch (l2ins.subtype()) { |
| case VLAN_POP: |
| ttb.add(l2ins); |
| break; |
| default: |
| break; |
| } |
| } else if (ins.type() == Instruction.Type.OUTPUT) { |
| portNum = ((Instructions.OutputInstruction) ins).port(); |
| ttb.add(ins); |
| } else { |
| log.warn("Driver does not handle this type of TrafficTreatment" |
| + " instruction in simple nextObjectives: {}", ins.type()); |
| } |
| } |
| |
| VlanId vlanId = readVlanFromMeta(nextObj); |
| if (vlanId == null) { |
| log.error("Driver cannot process an L2/L3 group chain without " |
| + "egress vlan information for dev: {} port:{}", |
| deviceId, portNum); |
| return; |
| } |
| |
| // assemble information for ofdpa l2interface group |
| int l2groupId = L2_INTERFACE_TYPE | (vlanId.toShort() << 16) | (int) portNum.toLong(); |
| // a globally unique groupkey that is different for ports in the same devices |
| // but different for the same portnumber on different devices. Also different |
| // for the various group-types created out of the same next objective. |
| int l2gk = l2InterfaceGroupKey(deviceId, vlanId, portNum.toLong()); |
| final GroupKey l2groupkey = new DefaultGroupKey(OFDPA2Pipeline.appKryo.serialize(l2gk)); |
| |
| // create group description for the l2interfacegroup |
| GroupBucket l2interfaceGroupBucket = |
| DefaultGroupBucket.createIndirectGroupBucket(ttb.build()); |
| GroupDescription l2groupDescription = |
| new DefaultGroupDescription( |
| deviceId, |
| GroupDescription.Type.INDIRECT, |
| new GroupBuckets(Collections.singletonList( |
| l2interfaceGroupBucket)), |
| l2groupkey, |
| l2groupId, |
| nextObj.appId()); |
| log.debug("Trying L2Interface: device:{} gid:{} gkey:{} nextId:{}", |
| deviceId, Integer.toHexString(l2groupId), |
| l2groupkey, nextObj.id()); |
| |
| // create object for local and distributed storage |
| Deque<GroupKey> singleKey = new ArrayDeque<>(); |
| singleKey.addFirst(l2groupkey); |
| OfdpaNextGroup ofdpaGrp = new OfdpaNextGroup( |
| Collections.singletonList(singleKey), |
| nextObj); |
| |
| // store l2groupkey for the nextObjective that depends on it |
| updatePendingNextObjective(l2groupkey, ofdpaGrp); |
| // send the group description to the group service |
| groupService.addGroup(l2groupDescription); |
| } |
| |
| /** |
| * Creates one of two possible group-chains from the treatment |
| * passed in. Depending on the MPLS boolean, this method either creates |
| * an L3Unicast Group --> L2Interface Group, if mpls is false; |
| * or MPLSInterface Group --> L2Interface Group, if mpls is true; |
| * The returned 'inner' group description is always the L2 Interface group. |
| * |
| * @param treatment that needs to be broken up to create the group chain |
| * @param nextId of the next objective that needs this group chain |
| * @param appId of the application that sent this next objective |
| * @param mpls determines if L3Unicast or MPLSInterface group is created |
| * @param meta metadata passed in by the application as part of the nextObjective |
| * @return GroupInfo containing the GroupDescription of the |
| * L2Interface group(inner) and the GroupDescription of the (outer) |
| * L3Unicast/MPLSInterface group. May return null if there is an |
| * error in processing the chain |
| */ |
| private GroupInfo createL2L3Chain(TrafficTreatment treatment, int nextId, |
| ApplicationId appId, boolean mpls, |
| TrafficSelector meta) { |
| // for the l2interface group, get vlan and port info |
| // for the outer group, get the src/dst mac, and vlan info |
| TrafficTreatment.Builder outerTtb = DefaultTrafficTreatment.builder(); |
| TrafficTreatment.Builder innerTtb = DefaultTrafficTreatment.builder(); |
| VlanId vlanid = null; |
| long portNum = 0; |
| boolean setVlan = false, popVlan = false; |
| MacAddress srcMac = MacAddress.ZERO; |
| MacAddress dstMac = MacAddress.ZERO; |
| for (Instruction ins : treatment.allInstructions()) { |
| if (ins.type() == Instruction.Type.L2MODIFICATION) { |
| L2ModificationInstruction l2ins = (L2ModificationInstruction) ins; |
| switch (l2ins.subtype()) { |
| case ETH_DST: |
| dstMac = ((L2ModificationInstruction.ModEtherInstruction) l2ins).mac(); |
| outerTtb.setEthDst(dstMac); |
| break; |
| case ETH_SRC: |
| srcMac = ((L2ModificationInstruction.ModEtherInstruction) l2ins).mac(); |
| outerTtb.setEthSrc(srcMac); |
| break; |
| case VLAN_ID: |
| vlanid = ((L2ModificationInstruction.ModVlanIdInstruction) l2ins).vlanId(); |
| outerTtb.setVlanId(vlanid); |
| setVlan = true; |
| break; |
| case VLAN_POP: |
| innerTtb.popVlan(); |
| popVlan = true; |
| break; |
| case DEC_MPLS_TTL: |
| case MPLS_LABEL: |
| case MPLS_POP: |
| case MPLS_PUSH: |
| case VLAN_PCP: |
| case VLAN_PUSH: |
| default: |
| break; |
| } |
| } else if (ins.type() == Instruction.Type.OUTPUT) { |
| portNum = ((Instructions.OutputInstruction) ins).port().toLong(); |
| innerTtb.add(ins); |
| } else { |
| log.warn("Driver does not handle this type of TrafficTreatment" |
| + " instruction in nextObjectives: {}", ins.type()); |
| } |
| } |
| |
| if (vlanid == null && meta != null) { |
| // use metadata if available |
| Criterion vidCriterion = meta.getCriterion(Criterion.Type.VLAN_VID); |
| if (vidCriterion != null) { |
| vlanid = ((VlanIdCriterion) vidCriterion).vlanId(); |
| } |
| // if vlan is not set, use the vlan in metadata for outerTtb |
| if (vlanid != null && !setVlan) { |
| outerTtb.setVlanId(vlanid); |
| } |
| } |
| |
| if (vlanid == null) { |
| log.error("Driver cannot process an L2/L3 group chain without " |
| + "egress vlan information for dev: {} port:{}", |
| deviceId, portNum); |
| return null; |
| } |
| |
| if (!setVlan && !popVlan) { |
| // untagged outgoing port |
| TrafficTreatment.Builder temp = DefaultTrafficTreatment.builder(); |
| temp.popVlan(); |
| innerTtb.build().allInstructions().forEach(i -> temp.add(i)); |
| innerTtb = temp; |
| } |
| |
| // assemble information for ofdpa l2interface group |
| int l2groupId = L2_INTERFACE_TYPE | (vlanid.toShort() << 16) | (int) portNum; |
| // a globally unique groupkey that is different for ports in the same device, |
| // but different for the same portnumber on different devices. Also different |
| // for the various group-types created out of the same next objective. |
| int l2gk = l2InterfaceGroupKey(deviceId, vlanid, portNum); |
| final GroupKey l2groupkey = new DefaultGroupKey(OFDPA2Pipeline.appKryo.serialize(l2gk)); |
| |
| // assemble information for outer group |
| GroupDescription outerGrpDesc = null; |
| if (mpls) { |
| // outer group is MPLSInteface |
| int mplsInterfaceIndex = getNextAvailableIndex(); |
| int mplsgroupId = MPLS_INTERFACE_TYPE | (SUBTYPE_MASK & mplsInterfaceIndex); |
| final GroupKey mplsgroupkey = new DefaultGroupKey( |
| OFDPA2Pipeline.appKryo.serialize(mplsInterfaceIndex)); |
| outerTtb.group(new DefaultGroupId(l2groupId)); |
| // create the mpls-interface group description to wait for the |
| // l2 interface group to be processed |
| GroupBucket mplsinterfaceGroupBucket = |
| DefaultGroupBucket.createIndirectGroupBucket(outerTtb.build()); |
| outerGrpDesc = new DefaultGroupDescription( |
| deviceId, |
| GroupDescription.Type.INDIRECT, |
| new GroupBuckets(Collections.singletonList( |
| mplsinterfaceGroupBucket)), |
| mplsgroupkey, |
| mplsgroupId, |
| appId); |
| log.debug("Trying MPLS-Interface: device:{} gid:{} gkey:{} nextid:{}", |
| deviceId, Integer.toHexString(mplsgroupId), |
| mplsgroupkey, nextId); |
| } else { |
| // outer group is L3Unicast |
| int l3unicastIndex = getNextAvailableIndex(); |
| int l3groupId = L3_UNICAST_TYPE | (TYPE_MASK & l3unicastIndex); |
| final GroupKey l3groupkey = new DefaultGroupKey( |
| OFDPA2Pipeline.appKryo.serialize(l3unicastIndex)); |
| outerTtb.group(new DefaultGroupId(l2groupId)); |
| // create the l3unicast group description to wait for the |
| // l2 interface group to be processed |
| GroupBucket l3unicastGroupBucket = |
| DefaultGroupBucket.createIndirectGroupBucket(outerTtb.build()); |
| outerGrpDesc = new DefaultGroupDescription( |
| deviceId, |
| GroupDescription.Type.INDIRECT, |
| new GroupBuckets(Collections.singletonList( |
| l3unicastGroupBucket)), |
| l3groupkey, |
| l3groupId, |
| appId); |
| log.debug("Trying L3Unicast: device:{} gid:{} gkey:{} nextid:{}", |
| deviceId, Integer.toHexString(l3groupId), |
| l3groupkey, nextId); |
| } |
| |
| // store l2groupkey with the groupChainElem for the outer-group that depends on it |
| GroupChainElem gce = new GroupChainElem(outerGrpDesc, 1, false); |
| updatePendingGroups(l2groupkey, gce); |
| |
| // create group description for the inner l2interfacegroup |
| GroupBucket l2interfaceGroupBucket = |
| DefaultGroupBucket.createIndirectGroupBucket(innerTtb.build()); |
| GroupDescription l2groupDescription = |
| new DefaultGroupDescription( |
| deviceId, |
| GroupDescription.Type.INDIRECT, |
| new GroupBuckets(Collections.singletonList( |
| l2interfaceGroupBucket)), |
| l2groupkey, |
| l2groupId, |
| appId); |
| log.debug("Trying L2Interface: device:{} gid:{} gkey:{} nextId:{}", |
| deviceId, Integer.toHexString(l2groupId), |
| l2groupkey, nextId); |
| return new GroupInfo(l2groupDescription, outerGrpDesc); |
| |
| } |
| |
| /** |
| * As per the OFDPA 2.0 TTP, packets are sent out of ports by using |
| * a chain of groups. The broadcast Next Objective passed in by the application |
| * has to be broken up into a group chain comprising of an |
| * L2 Flood group whose buckets point to L2 Interface groups. |
| * |
| * @param nextObj the nextObjective of type BROADCAST |
| */ |
| private void processBroadcastNextObjective(NextObjective nextObj) { |
| // break up broadcast next objective to multiple groups |
| Collection<TrafficTreatment> buckets = nextObj.next(); |
| |
| VlanId vlanId = readVlanFromMeta(nextObj); |
| if (vlanId == null) { |
| log.warn("Required VLAN ID info in nextObj metadata but not found. Aborting"); |
| return; |
| } |
| |
| // each treatment is converted to an L2 interface group |
| List<GroupDescription> l2interfaceGroupDescs = new ArrayList<>(); |
| List<Deque<GroupKey>> allGroupKeys = new ArrayList<>(); |
| for (TrafficTreatment treatment : buckets) { |
| TrafficTreatment.Builder newTreatment = DefaultTrafficTreatment.builder(); |
| PortNumber portNum = null; |
| // ensure that the only allowed treatments are pop-vlan and output |
| for (Instruction ins : treatment.allInstructions()) { |
| if (ins.type() == Instruction.Type.L2MODIFICATION) { |
| L2ModificationInstruction l2ins = (L2ModificationInstruction) ins; |
| switch (l2ins.subtype()) { |
| case VLAN_POP: |
| newTreatment.add(l2ins); |
| break; |
| default: |
| log.debug("action {} not permitted for broadcast nextObj", |
| l2ins.subtype()); |
| break; |
| } |
| } else if (ins.type() == Instruction.Type.OUTPUT) { |
| portNum = ((Instructions.OutputInstruction) ins).port(); |
| newTreatment.add(ins); |
| } else { |
| log.debug("TrafficTreatment of type {} not permitted in " + |
| " broadcast nextObjective", ins.type()); |
| } |
| } |
| |
| // assemble info for l2 interface group |
| int l2gk = l2InterfaceGroupKey(deviceId, vlanId, portNum.toLong()); |
| final GroupKey l2groupkey = new DefaultGroupKey(OFDPA2Pipeline.appKryo.serialize(l2gk)); |
| int l2groupId = L2_INTERFACE_TYPE | (vlanId.toShort() << 16) | |
| (int) portNum.toLong(); |
| GroupBucket l2interfaceGroupBucket = |
| DefaultGroupBucket.createIndirectGroupBucket(newTreatment.build()); |
| GroupDescription l2interfaceGroupDescription = |
| new DefaultGroupDescription( |
| deviceId, |
| GroupDescription.Type.INDIRECT, |
| new GroupBuckets(Collections.singletonList( |
| l2interfaceGroupBucket)), |
| l2groupkey, |
| l2groupId, |
| nextObj.appId()); |
| log.debug("Trying L2-Interface: device:{} gid:{} gkey:{} nextid:{}", |
| deviceId, Integer.toHexString(l2groupId), |
| l2groupkey, nextObj.id()); |
| |
| Deque<GroupKey> gkeyChain = new ArrayDeque<>(); |
| gkeyChain.addFirst(l2groupkey); |
| |
| // store the info needed to create this group |
| l2interfaceGroupDescs.add(l2interfaceGroupDescription); |
| allGroupKeys.add(gkeyChain); |
| } |
| |
| // assemble info for l2 flood group |
| // since there can be only one flood group for a vlan, its index is always the same - 0 |
| Integer l2floodgroupId = L2_FLOOD_TYPE | (vlanId.toShort() << 16); |
| int l2floodgk = getNextAvailableIndex(); |
| final GroupKey l2floodgroupkey = new DefaultGroupKey(OFDPA2Pipeline.appKryo.serialize(l2floodgk)); |
| // collection of group buckets pointing to all the l2 interface groups |
| List<GroupBucket> l2floodBuckets = new ArrayList<>(); |
| for (GroupDescription l2intGrpDesc : l2interfaceGroupDescs) { |
| TrafficTreatment.Builder ttb = DefaultTrafficTreatment.builder(); |
| ttb.group(new DefaultGroupId(l2intGrpDesc.givenGroupId())); |
| GroupBucket abucket = DefaultGroupBucket.createAllGroupBucket(ttb.build()); |
| l2floodBuckets.add(abucket); |
| } |
| // create the l2flood group-description to wait for all the |
| // l2interface groups to be processed |
| GroupDescription l2floodGroupDescription = |
| new DefaultGroupDescription( |
| deviceId, |
| GroupDescription.Type.ALL, |
| new GroupBuckets(l2floodBuckets), |
| l2floodgroupkey, |
| l2floodgroupId, |
| nextObj.appId()); |
| GroupChainElem gce = new GroupChainElem(l2floodGroupDescription, |
| l2interfaceGroupDescs.size(), |
| false); |
| log.debug("Trying L2-Flood: device:{} gid:{} gkey:{} nextid:{}", |
| deviceId, Integer.toHexString(l2floodgroupId), |
| l2floodgroupkey, nextObj.id()); |
| |
| // create objects for local and distributed storage |
| allGroupKeys.forEach(gkeyChain -> gkeyChain.addFirst(l2floodgroupkey)); |
| OfdpaNextGroup ofdpaGrp = new OfdpaNextGroup(allGroupKeys, nextObj); |
| |
| // store l2floodgroupkey with the ofdpaGroupChain for the nextObjective |
| // that depends on it |
| updatePendingNextObjective(l2floodgroupkey, ofdpaGrp); |
| |
| for (GroupDescription l2intGrpDesc : l2interfaceGroupDescs) { |
| // store all l2groupkeys with the groupChainElem for the l2floodgroup |
| // that depends on it |
| updatePendingGroups(l2intGrpDesc.appCookie(), gce); |
| // send groups for all l2 interface groups |
| groupService.addGroup(l2intGrpDesc); |
| } |
| } |
| |
| /** |
| * As per the OFDPA 2.0 TTP, packets are sent out of ports by using |
| * a chain of groups. The hashed Next Objective passed in by the application |
| * has to be broken up into a group chain comprising of an |
| * L3 ECMP group as the top level group. Buckets of this group can point |
| * to a variety of groups in a group chain, depending on the whether |
| * MPLS labels are being pushed or not. |
| * <p> |
| * NOTE: We do not create MPLS ECMP groups as they are unimplemented in |
| * OF-DPA 2.0 (even though it is in the spec). Therefore we do not |
| * check the nextObjective meta to see what is matching before being |
| * sent to this nextObjective. |
| * |
| * @param nextObj the nextObjective of type HASHED |
| */ |
| private void processHashedNextObjective(NextObjective nextObj) { |
| // storage for all group keys in the chain of groups created |
| List<Deque<GroupKey>> allGroupKeys = new ArrayList<>(); |
| List<GroupInfo> unsentGroups = new ArrayList<>(); |
| createHashBucketChains(nextObj, allGroupKeys, unsentGroups); |
| |
| // now we can create the outermost L3 ECMP group |
| List<GroupBucket> l3ecmpGroupBuckets = new ArrayList<>(); |
| for (GroupInfo gi : unsentGroups) { |
| // create ECMP bucket to point to the outer group |
| TrafficTreatment.Builder ttb = DefaultTrafficTreatment.builder(); |
| ttb.group(new DefaultGroupId(gi.outerGrpDesc.givenGroupId())); |
| GroupBucket sbucket = DefaultGroupBucket |
| .createSelectGroupBucket(ttb.build()); |
| l3ecmpGroupBuckets.add(sbucket); |
| } |
| int l3ecmpIndex = getNextAvailableIndex(); |
| int l3ecmpGroupId = L3_ECMP_TYPE | (TYPE_MASK & l3ecmpIndex); |
| GroupKey l3ecmpGroupKey = new DefaultGroupKey( |
| OFDPA2Pipeline.appKryo.serialize(l3ecmpIndex)); |
| GroupDescription l3ecmpGroupDesc = |
| new DefaultGroupDescription( |
| deviceId, |
| GroupDescription.Type.SELECT, |
| new GroupBuckets(l3ecmpGroupBuckets), |
| l3ecmpGroupKey, |
| l3ecmpGroupId, |
| nextObj.appId()); |
| GroupChainElem l3ecmpGce = new GroupChainElem(l3ecmpGroupDesc, |
| l3ecmpGroupBuckets.size(), |
| false); |
| |
| // create objects for local and distributed storage |
| allGroupKeys.forEach(gkeyChain -> gkeyChain.addFirst(l3ecmpGroupKey)); |
| OfdpaNextGroup ofdpaGrp = new OfdpaNextGroup(allGroupKeys, nextObj); |
| |
| // store l3ecmpGroupKey with the ofdpaGroupChain for the nextObjective |
| // that depends on it |
| updatePendingNextObjective(l3ecmpGroupKey, ofdpaGrp); |
| |
| log.debug("Trying L3ECMP: device:{} gid:{} gkey:{} nextId:{}", |
| deviceId, Integer.toHexString(l3ecmpGroupId), |
| l3ecmpGroupKey, nextObj.id()); |
| // finally we are ready to send the innermost groups |
| for (GroupInfo gi : unsentGroups) { |
| log.debug("Sending innermost group {} in group chain on device {} ", |
| Integer.toHexString(gi.innerGrpDesc.givenGroupId()), deviceId); |
| updatePendingGroups(gi.outerGrpDesc.appCookie(), l3ecmpGce); |
| groupService.addGroup(gi.innerGrpDesc); |
| } |
| |
| } |
| |
| /** |
| * Creates group chains for all buckets in a hashed group, and stores the |
| * GroupInfos and GroupKeys for all the groups in the lists passed in, which |
| * should be empty. |
| * <p> |
| * Does not create the top level ECMP group. Does not actually send the |
| * groups to the groupService. |
| * |
| * @param nextObj the Next Objective with buckets that need to be converted |
| * to group chains |
| * @param allGroupKeys a list to store groupKey for each bucket-group-chain |
| * @param unsentGroups a list to store GroupInfo for each bucket-group-chain |
| */ |
| private void createHashBucketChains(NextObjective nextObj, |
| List<Deque<GroupKey>> allGroupKeys, |
| List<GroupInfo> unsentGroups) { |
| // break up hashed next objective to multiple groups |
| Collection<TrafficTreatment> buckets = nextObj.next(); |
| |
| for (TrafficTreatment bucket : buckets) { |
| //figure out how many labels are pushed in each bucket |
| int labelsPushed = 0; |
| MplsLabel innermostLabel = null; |
| for (Instruction ins : bucket.allInstructions()) { |
| if (ins.type() == Instruction.Type.L2MODIFICATION) { |
| L2ModificationInstruction l2ins = (L2ModificationInstruction) ins; |
| if (l2ins.subtype() == L2ModificationInstruction.L2SubType.MPLS_PUSH) { |
| labelsPushed++; |
| } |
| if (l2ins.subtype() == L2ModificationInstruction.L2SubType.MPLS_LABEL) { |
| if (innermostLabel == null) { |
| innermostLabel = ((L2ModificationInstruction.ModMplsLabelInstruction) l2ins).label(); |
| } |
| } |
| } |
| } |
| |
| Deque<GroupKey> gkeyChain = new ArrayDeque<>(); |
| // XXX we only deal with 0 and 1 label push right now |
| if (labelsPushed == 0) { |
| GroupInfo nolabelGroupInfo = createL2L3Chain(bucket, nextObj.id(), |
| nextObj.appId(), false, |
| nextObj.meta()); |
| if (nolabelGroupInfo == null) { |
| log.error("Could not process nextObj={} in dev:{}", |
| nextObj.id(), deviceId); |
| return; |
| } |
| gkeyChain.addFirst(nolabelGroupInfo.innerGrpDesc.appCookie()); |
| gkeyChain.addFirst(nolabelGroupInfo.outerGrpDesc.appCookie()); |
| |
| // we can't send the inner group description yet, as we have to |
| // create the dependent ECMP group first. So we store.. |
| unsentGroups.add(nolabelGroupInfo); |
| |
| } else if (labelsPushed == 1) { |
| GroupInfo onelabelGroupInfo = createL2L3Chain(bucket, nextObj.id(), |
| nextObj.appId(), true, |
| nextObj.meta()); |
| if (onelabelGroupInfo == null) { |
| log.error("Could not process nextObj={} in dev:{}", |
| nextObj.id(), deviceId); |
| return; |
| } |
| // we need to add another group to this chain - the L3VPN group |
| TrafficTreatment.Builder l3vpnTtb = DefaultTrafficTreatment.builder(); |
| l3vpnTtb.pushMpls() |
| .setMpls(innermostLabel) |
| .setMplsBos(true) |
| .copyTtlOut() |
| .group(new DefaultGroupId( |
| onelabelGroupInfo.outerGrpDesc.givenGroupId())); |
| GroupBucket l3vpnGrpBkt = |
| DefaultGroupBucket.createIndirectGroupBucket(l3vpnTtb.build()); |
| int l3vpnIndex = getNextAvailableIndex(); |
| int l3vpngroupId = MPLS_L3VPN_SUBTYPE | (SUBTYPE_MASK & l3vpnIndex); |
| GroupKey l3vpngroupkey = new DefaultGroupKey( |
| OFDPA2Pipeline.appKryo.serialize(l3vpnIndex)); |
| GroupDescription l3vpnGroupDesc = |
| new DefaultGroupDescription( |
| deviceId, |
| GroupDescription.Type.INDIRECT, |
| new GroupBuckets(Collections.singletonList( |
| l3vpnGrpBkt)), |
| l3vpngroupkey, |
| l3vpngroupId, |
| nextObj.appId()); |
| GroupChainElem l3vpnGce = new GroupChainElem(l3vpnGroupDesc, 1, false); |
| updatePendingGroups(onelabelGroupInfo.outerGrpDesc.appCookie(), l3vpnGce); |
| |
| gkeyChain.addFirst(onelabelGroupInfo.innerGrpDesc.appCookie()); |
| gkeyChain.addFirst(onelabelGroupInfo.outerGrpDesc.appCookie()); |
| gkeyChain.addFirst(l3vpngroupkey); |
| |
| //now we can replace the outerGrpDesc with the one we just created |
| onelabelGroupInfo.outerGrpDesc = l3vpnGroupDesc; |
| |
| // we can't send the innermost group yet, as we have to create |
| // the dependent ECMP group first. So we store ... |
| unsentGroups.add(onelabelGroupInfo); |
| |
| log.debug("Trying L3VPN: device:{} gid:{} gkey:{} nextId:{}", |
| deviceId, Integer.toHexString(l3vpngroupId), |
| l3vpngroupkey, nextObj.id()); |
| |
| } else { |
| log.warn("Driver currently does not handle more than 1 MPLS " |
| + "labels. Not processing nextObjective {}", nextObj.id()); |
| return; |
| } |
| |
| // all groups in this chain |
| allGroupKeys.add(gkeyChain); |
| } |
| } |
| |
| ////////////////////////////////////// |
| // Group Editing |
| ////////////////////////////////////// |
| |
| /** |
| * Adds a bucket to the top level group of a group-chain, and creates the chain. |
| * |
| * @param nextObjective the next group to add a bucket to |
| * @param next the representation of the existing group-chain for this next objective |
| */ |
| protected void addBucketToGroup(NextObjective nextObjective, NextGroup next) { |
| if (nextObjective.type() != NextObjective.Type.HASHED) { |
| log.warn("AddBuckets not applied to nextType:{} in dev:{} for next:{}", |
| nextObjective.type(), deviceId, nextObjective.id()); |
| return; |
| } |
| if (nextObjective.next().size() > 1) { |
| log.warn("Only one bucket can be added at a time"); |
| return; |
| } |
| // storage for all group keys in the chain of groups created |
| List<Deque<GroupKey>> allGroupKeys = new ArrayList<>(); |
| List<GroupInfo> unsentGroups = new ArrayList<>(); |
| createHashBucketChains(nextObjective, allGroupKeys, unsentGroups); |
| |
| // now we can create the outermost L3 ECMP group bucket to add |
| GroupInfo gi = unsentGroups.get(0); // only one bucket, so only one group-chain |
| TrafficTreatment.Builder ttb = DefaultTrafficTreatment.builder(); |
| ttb.group(new DefaultGroupId(gi.outerGrpDesc.givenGroupId())); |
| GroupBucket sbucket = DefaultGroupBucket.createSelectGroupBucket(ttb.build()); |
| |
| // recreate the original L3 ECMP group id and description |
| int l3ecmpGroupId = L3_ECMP_TYPE | nextObjective.id() << 12; |
| GroupKey l3ecmpGroupKey = new DefaultGroupKey(OFDPA2Pipeline.appKryo.serialize(l3ecmpGroupId)); |
| |
| // Although GroupDescriptions are not necessary for adding buckets to |
| // existing groups, we use one in the GroupChainElem. When the latter is |
| // processed, the info will be extracted for the bucketAdd call to groupService |
| GroupDescription l3ecmpGroupDesc = |
| new DefaultGroupDescription( |
| deviceId, |
| GroupDescription.Type.SELECT, |
| new GroupBuckets(Collections.singletonList(sbucket)), |
| l3ecmpGroupKey, |
| l3ecmpGroupId, |
| nextObjective.appId()); |
| GroupChainElem l3ecmpGce = new GroupChainElem(l3ecmpGroupDesc, 1, true); |
| |
| // update original NextGroup with new bucket-chain |
| // don't need to update pendingNextObjectives -- group already exists |
| Deque<GroupKey> newBucketChain = allGroupKeys.get(0); |
| newBucketChain.addFirst(l3ecmpGroupKey); |
| List<Deque<GroupKey>> allOriginalKeys = OFDPA2Pipeline.appKryo.deserialize(next.data()); |
| allOriginalKeys.add(newBucketChain); |
| flowObjectiveStore.putNextGroup(nextObjective.id(), |
| new OfdpaNextGroup(allOriginalKeys, nextObjective)); |
| |
| log.debug("Adding to L3ECMP: device:{} gid:{} gkey:{} nextId:{}", |
| deviceId, Integer.toHexString(l3ecmpGroupId), |
| l3ecmpGroupKey, nextObjective.id()); |
| // send the innermost group |
| log.debug("Sending innermost group {} in group chain on device {} ", |
| Integer.toHexString(gi.innerGrpDesc.givenGroupId()), deviceId); |
| updatePendingGroups(gi.outerGrpDesc.appCookie(), l3ecmpGce); |
| groupService.addGroup(gi.innerGrpDesc); |
| |
| } |
| |
| /** |
| * Removes the bucket in the top level group of a possible group-chain. Does |
| * not remove the groups in a group-chain pointed to by this bucket, as they |
| * may be in use (referenced by other groups) elsewhere. |
| * |
| * @param nextObjective the next group to remove a bucket from |
| * @param next the representation of the existing group-chain for this next objective |
| */ |
| protected void removeBucketFromGroup(NextObjective nextObjective, NextGroup next) { |
| if (nextObjective.type() != NextObjective.Type.HASHED) { |
| log.warn("RemoveBuckets not applied to nextType:{} in dev:{} for next:{}", |
| nextObjective.type(), deviceId, nextObjective.id()); |
| return; |
| } |
| Collection<TrafficTreatment> treatments = nextObjective.next(); |
| TrafficTreatment treatment = treatments.iterator().next(); |
| // find the bucket to remove by noting the outport, and figuring out the |
| // top-level group in the group-chain that indirectly references the port |
| PortNumber outport = null; |
| for (Instruction ins : treatment.allInstructions()) { |
| if (ins instanceof Instructions.OutputInstruction) { |
| outport = ((Instructions.OutputInstruction) ins).port(); |
| break; |
| } |
| } |
| if (outport == null) { |
| log.error("next objective {} has no outport", nextObjective.id()); |
| return; |
| } |
| |
| List<Deque<GroupKey>> allgkeys = OFDPA2Pipeline.appKryo.deserialize(next.data()); |
| Deque<GroupKey> foundChain = null; |
| int index = 0; |
| for (Deque<GroupKey> gkeys : allgkeys) { |
| GroupKey groupWithPort = gkeys.peekLast(); |
| Group group = groupService.getGroup(deviceId, groupWithPort); |
| if (group == null) { |
| log.warn("Inconsistent group chain"); |
| continue; |
| } |
| // last group in group chain should have a single bucket pointing to port |
| List<Instruction> lastIns = group.buckets().buckets().iterator() |
| .next().treatment().allInstructions(); |
| for (Instruction i : lastIns) { |
| if (i instanceof Instructions.OutputInstruction) { |
| PortNumber lastport = ((Instructions.OutputInstruction) i).port(); |
| if (lastport.equals(outport)) { |
| foundChain = gkeys; |
| break; |
| } |
| } |
| } |
| if (foundChain != null) { |
| break; |
| } |
| index++; |
| } |
| if (foundChain != null) { |
| //first groupkey is the one we want to modify |
| GroupKey modGroupKey = foundChain.peekFirst(); |
| Group modGroup = groupService.getGroup(deviceId, modGroupKey); |
| //second groupkey is the one we wish to remove the reference to |
| GroupKey pointedGroupKey = null; |
| int i = 0; |
| for (GroupKey gk : foundChain) { |
| if (i++ == 1) { |
| pointedGroupKey = gk; |
| break; |
| } |
| } |
| Group pointedGroup = groupService.getGroup(deviceId, pointedGroupKey); |
| GroupBucket bucket = DefaultGroupBucket.createSelectGroupBucket( |
| DefaultTrafficTreatment.builder() |
| .group(pointedGroup.id()) |
| .build()); |
| GroupBuckets removeBuckets = new GroupBuckets(Collections |
| .singletonList(bucket)); |
| log.debug("Removing buckets from group id {} for next id {} in device {}", |
| modGroup.id(), nextObjective.id(), deviceId); |
| groupService.removeBucketsFromGroup(deviceId, modGroupKey, |
| removeBuckets, modGroupKey, |
| nextObjective.appId()); |
| //update store |
| allgkeys.remove(index); |
| flowObjectiveStore.putNextGroup(nextObjective.id(), |
| new OfdpaNextGroup(allgkeys, nextObjective)); |
| } else { |
| log.warn("Could not find appropriate group-chain for removing bucket" |
| + " for next id {} in dev:{}", nextObjective.id(), deviceId); |
| } |
| } |
| |
| /** |
| * Removes all groups in multiple possible group-chains that represent the next |
| * objective. |
| * |
| * @param nextObjective the next objective to remove |
| * @param next the NextGroup that represents the existing group-chain for |
| * this next objective |
| */ |
| protected void removeGroup(NextObjective nextObjective, NextGroup next) { |
| List<Deque<GroupKey>> allgkeys = OFDPA2Pipeline.appKryo.deserialize(next.data()); |
| allgkeys.forEach(groupChain -> groupChain.forEach(groupKey -> |
| groupService.removeGroup(deviceId, groupKey, nextObjective.appId()))); |
| flowObjectiveStore.removeNextGroup(nextObjective.id()); |
| } |
| |
| ////////////////////////////////////// |
| // Helper Methods and Classes |
| ////////////////////////////////////// |
| |
| private void updatePendingNextObjective(GroupKey key, OfdpaNextGroup value) { |
| List<OfdpaNextGroup> nextList = new CopyOnWriteArrayList<OfdpaNextGroup>(); |
| nextList.add(value); |
| List<OfdpaNextGroup> ret = pendingNextObjectives.asMap() |
| .putIfAbsent(key, nextList); |
| if (ret != null) { |
| ret.add(value); |
| } |
| } |
| |
| private void updatePendingGroups(GroupKey gkey, GroupChainElem gce) { |
| Set<GroupChainElem> gceSet = Collections.newSetFromMap( |
| new ConcurrentHashMap<GroupChainElem, Boolean>()); |
| gceSet.add(gce); |
| Set<GroupChainElem> retval = pendingGroups.putIfAbsent(gkey, gceSet); |
| if (retval != null) { |
| retval.add(gce); |
| } |
| } |
| |
| /** |
| * Processes next element of a group chain. Assumption is that if this |
| * group points to another group, the latter has already been created |
| * and this driver has received notification for it. A second assumption is |
| * that if there is another group waiting for this group then the appropriate |
| * stores already have the information to act upon the notification for the |
| * creation of this group. |
| * <p> |
| * The processing of the GroupChainElement depends on the number of groups |
| * this element is waiting on. For all group types other than SIMPLE, a |
| * GroupChainElement could be waiting on multiple groups. |
| * |
| * @param gce the group chain element to be processed next |
| */ |
| private void processGroupChain(GroupChainElem gce) { |
| int waitOnGroups = gce.decrementAndGetGroupsWaitedOn(); |
| if (waitOnGroups != 0) { |
| log.debug("GCE: {} not ready to be processed", gce); |
| return; |
| } |
| log.debug("GCE: {} ready to be processed", gce); |
| if (gce.addBucketToGroup) { |
| groupService.addBucketsToGroup(gce.groupDescription.deviceId(), |
| gce.groupDescription.appCookie(), |
| gce.groupDescription.buckets(), |
| gce.groupDescription.appCookie(), |
| gce.groupDescription.appId()); |
| } else { |
| groupService.addGroup(gce.groupDescription); |
| } |
| } |
| |
| private class GroupChecker implements Runnable { |
| @Override |
| public void run() { |
| Set<GroupKey> keys = pendingGroups.keySet().stream() |
| .filter(key -> groupService.getGroup(deviceId, key) != null) |
| .collect(Collectors.toSet()); |
| Set<GroupKey> otherkeys = pendingNextObjectives.asMap().keySet().stream() |
| .filter(otherkey -> groupService.getGroup(deviceId, otherkey) != null) |
| .collect(Collectors.toSet()); |
| keys.addAll(otherkeys); |
| |
| keys.stream().forEach(key -> |
| processPendingGroupsOrNextObjectives(key, false)); |
| } |
| } |
| |
| private class InnerGroupListener implements GroupListener { |
| @Override |
| public void event(GroupEvent event) { |
| log.trace("received group event of type {}", event.type()); |
| if (event.type() == GroupEvent.Type.GROUP_ADDED) { |
| GroupKey key = event.subject().appCookie(); |
| processPendingGroupsOrNextObjectives(key, true); |
| } |
| } |
| } |
| |
| private void processPendingGroupsOrNextObjectives(GroupKey key, boolean added) { |
| //first check for group chain |
| Set<GroupChainElem> gceSet = pendingGroups.remove(key); |
| if (gceSet != null) { |
| for (GroupChainElem gce : gceSet) { |
| log.info("Group service {} group key {} in device {}. " |
| + "Processing next group in group chain with group id 0x{}", |
| (added) ? "ADDED" : "processed", |
| key, deviceId, |
| Integer.toHexString(gce.groupDescription.givenGroupId())); |
| processGroupChain(gce); |
| } |
| } else { |
| // otherwise chain complete - check for waiting nextObjectives |
| List<OfdpaNextGroup> nextGrpList = pendingNextObjectives.getIfPresent(key); |
| if (nextGrpList != null) { |
| pendingNextObjectives.invalidate(key); |
| nextGrpList.forEach(nextGrp -> { |
| log.info("Group service {} group key {} in device:{}. " |
| + "Done implementing next objective: {} <<-->> gid:0x{}", |
| (added) ? "ADDED" : "processed", |
| key, deviceId, nextGrp.nextObjective().id(), |
| Integer.toHexString(groupService.getGroup(deviceId, key) |
| .givenGroupId())); |
| OFDPA2Pipeline.pass(nextGrp.nextObjective()); |
| flowObjectiveStore.putNextGroup(nextGrp.nextObjective().id(), nextGrp); |
| // check if addBuckets waiting for this completion |
| NextObjective pendBkt = pendingBuckets |
| .remove(nextGrp.nextObjective().id()); |
| if (pendBkt != null) { |
| addBucketToGroup(pendBkt, nextGrp); |
| } |
| }); |
| } |
| } |
| } |
| |
| private VlanId readVlanFromMeta(NextObjective nextObj) { |
| TrafficSelector metadata = nextObj.meta(); |
| Criterion criterion = metadata.getCriterion(Criterion.Type.VLAN_VID); |
| return (criterion == null) |
| ? null : ((VlanIdCriterion) criterion).vlanId(); |
| } |
| |
| private int getNextAvailableIndex() { |
| return (int) nextIndex.incrementAndGet(); |
| } |
| |
| /** |
| * Returns a hash as the L2 Interface Group Key. |
| * |
| * Keep the lower 6-bit for port since port number usually smaller than 64. |
| * Hash other information into remaining 28 bits. |
| * |
| * @param deviceId Device ID |
| * @param vlanId VLAN ID |
| * @param portNumber Port number |
| * @return L2 interface group key |
| */ |
| private int l2InterfaceGroupKey( |
| DeviceId deviceId, VlanId vlanId, long portNumber) { |
| int portLowerBits = (int) portNumber & PORT_LOWER_BITS_MASK; |
| long portHigherBits = portNumber & PORT_HIGHER_BITS_MASK; |
| int hash = Objects.hash(deviceId, vlanId, portHigherBits); |
| return L2_INTERFACE_TYPE | (TYPE_MASK & hash << 6) | portLowerBits; |
| } |
| |
| /** |
| * Utility class for moving group information around. |
| */ |
| private class GroupInfo { |
| private GroupDescription innerGrpDesc; |
| private GroupDescription outerGrpDesc; |
| |
| GroupInfo(GroupDescription innerGrpDesc, GroupDescription outerGrpDesc) { |
| this.innerGrpDesc = innerGrpDesc; |
| this.outerGrpDesc = outerGrpDesc; |
| } |
| } |
| |
| /** |
| * Represents an entire group-chain that implements a Next-Objective from |
| * the application. The objective is represented as a list of deques, where |
| * each deque is a separate chain of groups. |
| * <p> |
| * For example, an ECMP group with 3 buckets, where each bucket points to |
| * a group chain of L3 Unicast and L2 interface groups will look like this: |
| * <ul> |
| * <li>List[0] is a Deque of GroupKeyECMP(first)-GroupKeyL3(middle)-GroupKeyL2(last) |
| * <li>List[1] is a Deque of GroupKeyECMP(first)-GroupKeyL3(middle)-GroupKeyL2(last) |
| * <li>List[2] is a Deque of GroupKeyECMP(first)-GroupKeyL3(middle)-GroupKeyL2(last) |
| * </ul> |
| * where the first element of each deque is the same, representing the |
| * top level ECMP group, while every other element represents a unique groupKey. |
| * <p> |
| * Also includes information about the next objective that |
| * resulted in this group-chain. |
| * |
| */ |
| protected class OfdpaNextGroup implements NextGroup { |
| private final NextObjective nextObj; |
| private final List<Deque<GroupKey>> gkeys; |
| |
| public OfdpaNextGroup(List<Deque<GroupKey>> gkeys, NextObjective nextObj) { |
| this.gkeys = gkeys; |
| this.nextObj = nextObj; |
| } |
| |
| public List<Deque<GroupKey>> groupKey() { |
| return gkeys; |
| } |
| |
| public NextObjective nextObjective() { |
| return nextObj; |
| } |
| |
| @Override |
| public byte[] data() { |
| return OFDPA2Pipeline.appKryo.serialize(gkeys); |
| } |
| } |
| |
| /** |
| * Represents a group element that is part of a chain of groups. |
| * Stores enough information to create a Group Description to add the group |
| * to the switch by requesting the Group Service. Objects instantiating this |
| * class are meant to be temporary and live as long as it is needed to wait for |
| * preceding groups in the group chain to be created. |
| */ |
| private class GroupChainElem { |
| private GroupDescription groupDescription; |
| private AtomicInteger waitOnGroups; |
| private boolean addBucketToGroup; |
| |
| GroupChainElem(GroupDescription groupDescription, int waitOnGroups, |
| boolean addBucketToGroup) { |
| this.groupDescription = groupDescription; |
| this.waitOnGroups = new AtomicInteger(waitOnGroups); |
| this.addBucketToGroup = addBucketToGroup; |
| } |
| |
| /** |
| * This methods atomically decrements the counter for the number of |
| * groups this GroupChainElement is waiting on, for notifications from |
| * the Group Service. When this method returns a value of 0, this |
| * GroupChainElement is ready to be processed. |
| * |
| * @return integer indication of the number of notifications being waited on |
| */ |
| int decrementAndGetGroupsWaitedOn() { |
| return waitOnGroups.decrementAndGet(); |
| } |
| |
| @Override |
| public String toString() { |
| return (Integer.toHexString(groupDescription.givenGroupId()) + |
| " groupKey: " + groupDescription.appCookie() + |
| " waiting-on-groups: " + waitOnGroups.get() + |
| " addBucketToGroup: " + addBucketToGroup + |
| " device: " + deviceId); |
| } |
| } |
| } |