org.onosproject.driver.pipeline.ofdpa

Class Ofdpa2GroupHandler

java.lang.Object

org.onosproject.driver.pipeline.ofdpa.Ofdpa2GroupHandler

Direct Known Subclasses:

Ofdpa3GroupHandler, OvsOfdpaGroupHandler

public class Ofdpa2GroupHandler
extends Object

Group handler that emulates Broadcom OF-DPA TTP.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.onosproject.net.DeviceId	deviceId
protected org.onosproject.net.flowobjective.FlowObjectiveStore	flowObjectiveStore
protected org.onosproject.net.group.GroupService	groupService
protected org.slf4j.Logger	log
protected ConcurrentHashMap<Integer,Set<org.onosproject.net.flowobjective.NextObjective>>	pendingBuckets
protected org.onosproject.store.service.StorageService	storageService

Constructor Summary

Constructors

Constructor and Description
Ofdpa2GroupHandler()

Method Summary

Modifier and Type	Method and Description
protected void	addBucketToGroup(org.onosproject.net.flowobjective.NextObjective nextObjective, org.onosproject.net.behaviour.NextGroup next) Adds a bucket to the top level group of a group-chain, and creates the chain.
protected void	addGroup(org.onosproject.net.flowobjective.NextObjective nextObjective) Adds a list of group chain by given NextObjective.
protected void	addPendingRemoveNextObjective(org.onosproject.net.flowobjective.NextObjective nextObjective, List<org.onosproject.net.group.GroupKey> groupKeys)
protected void	addPendingUpdateNextObjective(org.onosproject.net.group.GroupKey groupKey, org.onosproject.net.flowobjective.NextObjective nextObjective)
protected void	createEcmpHashBucketChains(org.onosproject.net.flowobjective.NextObjective nextObj, List<Deque<org.onosproject.net.group.GroupKey>> allGroupKeys, List<OfdpaGroupHandlerUtility.GroupInfo> unsentGroups) 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.
protected OfdpaGroupHandlerUtility.GroupInfo	createL2L3Chain(org.onosproject.net.flow.TrafficTreatment treatment, int nextId, org.onosproject.core.ApplicationId appId, boolean mpls, org.onosproject.net.flow.TrafficSelector meta) Creates one of two possible group-chains from the treatment passed in.
protected OfdpaGroupHandlerUtility.GroupInfo	createL2L3ChainInternal(org.onosproject.net.flow.TrafficTreatment treatment, int nextId, org.onosproject.core.ApplicationId appId, boolean mpls, org.onosproject.net.flow.TrafficSelector meta, boolean useSetVlanExtension) Internal implementation of createL2L3Chain.
protected org.onosproject.net.group.GroupDescription	createMplsSwap(int nextGroupId, OfdpaGroupHandlerUtility.OfdpaMplsGroupSubType subtype, int index, org.onlab.packet.MplsLabel mplsLabel, org.onosproject.core.ApplicationId applicationId) Creates an Mpls group of type swap.
protected int	getNextAvailableIndex()
void	init(org.onosproject.net.DeviceId deviceId, org.onosproject.net.behaviour.PipelinerContext context)
protected void	modifyBucketFromGroup(org.onosproject.net.flowobjective.NextObjective nextObjective, org.onosproject.net.behaviour.NextGroup nextGroup) modifies group with next objective.
protected void	modifyBucketInL2Group(org.onosproject.net.flowobjective.NextObjective nextObjective, org.onosproject.net.behaviour.NextGroup next) Modify buckets in the L2 interface group.
protected void	modifyBucketInL3Group(org.onosproject.net.flowobjective.NextObjective nextObjective, org.onosproject.net.behaviour.NextGroup next)
protected void	processEcmpHashedNextObjective(org.onosproject.net.flowobjective.NextObjective nextObj) As per the OFDPA 2.0 TTP, packets are sent out of ports by using a chain of groups.
protected void	processPendingAddGroupsOrNextObjs(org.onosproject.net.group.GroupKey key, boolean added)
protected void	processPendingRemoveNextObjs(org.onosproject.net.group.GroupKey key)
protected void	processPendingUpdateNextObjs(org.onosproject.net.group.GroupKey groupKey)
protected void	processPwNextObjective(org.onosproject.net.flowobjective.NextObjective nextObjective) Processes the pseudo wire related next objective.
protected void	removeBucket(List<Deque<org.onosproject.net.group.GroupKey>> chainsToRemove, org.onosproject.net.flowobjective.NextObjective nextObjective) Removes top-level buckets from a group that represents the given next objective.
protected void	removeBucketFromGroup(org.onosproject.net.flowobjective.NextObjective nextObjective, org.onosproject.net.behaviour.NextGroup next) Removes buckets in the top level group of a possible group-chain.
protected void	removeGroup(org.onosproject.net.flowobjective.NextObjective nextObjective, org.onosproject.net.behaviour.NextGroup next) Removes all groups in multiple possible group-chains that represent the next-obj.
protected boolean	requireAllowVlanTransition() Determines whether this pipeline requires AllowVlanTransition in L2 unfiltered group.
protected boolean	requireVlanPopBeforeMplsPush() Determines whether this pipeline requires popping VLAN before pushing MPLS.
protected boolean	supportCopyTtl() Determines whether this pipeline support copy ttl instructions or not.
protected boolean	supportSetMplsBos() Determines whether this pipeline support set mpls bos instruction or not.
protected void	updatePendingGroups(org.onosproject.net.group.GroupKey groupKey, OfdpaGroupHandlerUtility.GroupChainElem gce)
protected void	updatePendingNextObjective(org.onosproject.net.group.GroupKey groupKey, OfdpaGroupHandlerUtility.OfdpaNextGroup nextGrp)
protected void	verifyGroup(org.onosproject.net.flowobjective.NextObjective nextObjective, org.onosproject.net.behaviour.NextGroup next) Checks existing buckets in NextGroup to verify if they match the buckets in the given NextObjective.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

protected final org.slf4j.Logger log

groupService

protected org.onosproject.net.group.GroupService groupService

storageService

protected org.onosproject.store.service.StorageService storageService

flowObjectiveStore

protected org.onosproject.net.flowobjective.FlowObjectiveStore flowObjectiveStore

deviceId

protected org.onosproject.net.DeviceId deviceId

pendingBuckets

protected ConcurrentHashMap<Integer,Set<org.onosproject.net.flowobjective.NextObjective>> pendingBuckets

Constructor Detail

Ofdpa2GroupHandler

public Ofdpa2GroupHandler()

Method Detail

supportCopyTtl

protected boolean supportCopyTtl()

Determines whether this pipeline support copy ttl instructions or not.

Returns:

true if copy ttl instructions are supported

supportSetMplsBos

protected boolean supportSetMplsBos()

Determines whether this pipeline support set mpls bos instruction or not.

Returns:

true if set mpls bos instruction is supported

requireVlanPopBeforeMplsPush

protected boolean requireVlanPopBeforeMplsPush()

Determines whether this pipeline requires popping VLAN before pushing MPLS.

If required, pop vlan before push mpls and add an arbitrary vlan back afterward. MPLS interface group will substitute the arbitrary VLAN with expected VLAN later on.

Returns:

true if this pipeline requires popping VLAN before pushing MPLS

requireAllowVlanTransition

protected boolean requireAllowVlanTransition()

Determines whether this pipeline requires AllowVlanTransition in L2 unfiltered group.

Returns:

true if the AllowVlanTransition action is required

init

public void init(org.onosproject.net.DeviceId deviceId,
                 org.onosproject.net.behaviour.PipelinerContext context)

addGroup

protected void addGroup(org.onosproject.net.flowobjective.NextObjective nextObjective)

Adds a list of group chain by given NextObjective.

Parameters:

nextObjective - the NextObjective

createMplsSwap

protected org.onosproject.net.group.GroupDescription createMplsSwap(int nextGroupId,
                                                                    OfdpaGroupHandlerUtility.OfdpaMplsGroupSubType subtype,
                                                                    int index,
                                                                    org.onlab.packet.MplsLabel mplsLabel,
                                                                    org.onosproject.core.ApplicationId applicationId)

Creates an Mpls group of type swap.

Parameters:

nextGroupId - the next group in the chain

subtype - the mpls swap label group subtype

index - the index of the group

mplsLabel - the mpls label to swap

applicationId - the application id

Returns:

the group description

createL2L3Chain

protected OfdpaGroupHandlerUtility.GroupInfo createL2L3Chain(org.onosproject.net.flow.TrafficTreatment treatment,
                                                             int nextId,
                                                             org.onosproject.core.ApplicationId appId,
                                                             boolean mpls,
                                                             org.onosproject.net.flow.TrafficSelector meta)

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.

Parameters:

treatment - that needs to be broken up to create the group chain

nextId - of the next objective that needs this group chain

appId - of the application that sent this next objective

mpls - determines if L3Unicast or MPLSInterface group is created

meta - metadata passed in by the application as part of the nextObjective

Returns:

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

createL2L3ChainInternal

protected OfdpaGroupHandlerUtility.GroupInfo createL2L3ChainInternal(org.onosproject.net.flow.TrafficTreatment treatment,
                                                                     int nextId,
                                                                     org.onosproject.core.ApplicationId appId,
                                                                     boolean mpls,
                                                                     org.onosproject.net.flow.TrafficSelector meta,
                                                                     boolean useSetVlanExtension)

Internal implementation of createL2L3Chain.

The is_present bit in set_vlan_vid action is required to be 0 in OFDPA i12. Since it is non-OF spec, we need an extension treatment for that. The useSetVlanExtension must be set to false for OFDPA i12.

Parameters:

treatment - that needs to be broken up to create the group chain

nextId - of the next objective that needs this group chain

appId - of the application that sent this next objective

mpls - determines if L3Unicast or MPLSInterface group is created

meta - metadata passed in by the application as part of the nextObjective

useSetVlanExtension - use the setVlanVid extension that has is_present bit set to 0.

Returns:

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

processEcmpHashedNextObjective

protected void processEcmpHashedNextObjective(org.onosproject.net.flowobjective.NextObjective nextObj)

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.

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.

Parameters:

nextObj - the nextObjective of type HASHED

createEcmpHashBucketChains

protected void createEcmpHashBucketChains(org.onosproject.net.flowobjective.NextObjective nextObj,
                                          List<Deque<org.onosproject.net.group.GroupKey>> allGroupKeys,
                                          List<OfdpaGroupHandlerUtility.GroupInfo> unsentGroups)

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.

Does not create the top level ECMP group. Does not actually send the groups to the groupService.

Parameters:

nextObj - the Next Objective with buckets that need to be converted to group chains

allGroupKeys - a list to store groupKey for each bucket-group-chain

unsentGroups - a list to store GroupInfo for each bucket-group-chain

processPwNextObjective

protected void processPwNextObjective(org.onosproject.net.flowobjective.NextObjective nextObjective)

Processes the pseudo wire related next objective. This procedure try to reuse the mpls label groups, the mpls interface group and the l2 interface group.

Parameters:

nextObjective - the objective to process.

addBucketToGroup

protected void addBucketToGroup(org.onosproject.net.flowobjective.NextObjective nextObjective,
                                org.onosproject.net.behaviour.NextGroup next)

Adds a bucket to the top level group of a group-chain, and creates the chain. Ensures that bucket being added is not a duplicate, by checking existing buckets for the same output port.

Parameters:

nextObjective - the bucket information for a next group

next - the representation of the existing group-chain for this next objective

removeBucketFromGroup

protected void removeBucketFromGroup(org.onosproject.net.flowobjective.NextObjective nextObjective,
                                     org.onosproject.net.behaviour.NextGroup next)

Removes buckets in the top level group of a possible group-chain. Does not remove the groups in the group-chain pointed to by this bucket, as they may be in use (referenced by other groups) elsewhere.

Parameters:

nextObjective - a next objective that contains information for the buckets to be removed from the group

next - the representation of the existing group-chains for this next objective, from which the top-level buckets to remove are determined

removeBucket

protected void removeBucket(List<Deque<org.onosproject.net.group.GroupKey>> chainsToRemove,
                            org.onosproject.net.flowobjective.NextObjective nextObjective)

Removes top-level buckets from a group that represents the given next objective.

Parameters:

chainsToRemove - a list of group bucket chains to remove

nextObjective - the next objective that contains information for the buckets to be removed from the group

removeGroup

protected void removeGroup(org.onosproject.net.flowobjective.NextObjective nextObjective,
                           org.onosproject.net.behaviour.NextGroup next)

Removes all groups in multiple possible group-chains that represent the next-obj.

Parameters:

nextObjective - the next objective to remove

next - the NextGroup that represents the existing group-chain for this next objective

modifyBucketFromGroup

protected void modifyBucketFromGroup(org.onosproject.net.flowobjective.NextObjective nextObjective,
                                     org.onosproject.net.behaviour.NextGroup nextGroup)

modifies group with next objective.

Parameters:

nextObjective - the NextObjective

nextGroup - the NextGroup

modifyBucketInL2Group

protected void modifyBucketInL2Group(org.onosproject.net.flowobjective.NextObjective nextObjective,
                                     org.onosproject.net.behaviour.NextGroup next)

Modify buckets in the L2 interface group.

Parameters:

nextObjective - a next objective that contains information for the buckets to be modified in the group

next - the representation of the existing group-chains for this next objective, from which the innermost group buckets to remove are determined

modifyBucketInL3Group

protected void modifyBucketInL3Group(org.onosproject.net.flowobjective.NextObjective nextObjective,
                                     org.onosproject.net.behaviour.NextGroup next)

verifyGroup

protected void verifyGroup(org.onosproject.net.flowobjective.NextObjective nextObjective,
                           org.onosproject.net.behaviour.NextGroup next)

Checks existing buckets in NextGroup to verify if they match the buckets in the given NextObjective. Adds or removes buckets to ensure that the buckets match up.

Parameters:

nextObjective - the next objective to verify

next - the representation of the existing group which has to be modified to match the given next objective

updatePendingNextObjective

protected void updatePendingNextObjective(org.onosproject.net.group.GroupKey groupKey,
                                          OfdpaGroupHandlerUtility.OfdpaNextGroup nextGrp)

updatePendingGroups

protected void updatePendingGroups(org.onosproject.net.group.GroupKey groupKey,
                                   OfdpaGroupHandlerUtility.GroupChainElem gce)

addPendingUpdateNextObjective

protected void addPendingUpdateNextObjective(org.onosproject.net.group.GroupKey groupKey,
                                             org.onosproject.net.flowobjective.NextObjective nextObjective)

addPendingRemoveNextObjective

protected void addPendingRemoveNextObjective(org.onosproject.net.flowobjective.NextObjective nextObjective,
                                             List<org.onosproject.net.group.GroupKey> groupKeys)

getNextAvailableIndex

protected int getNextAvailableIndex()

processPendingUpdateNextObjs

protected void processPendingUpdateNextObjs(org.onosproject.net.group.GroupKey groupKey)

processPendingRemoveNextObjs

protected void processPendingRemoveNextObjs(org.onosproject.net.group.GroupKey key)

processPendingAddGroupsOrNextObjs

protected void processPendingAddGroupsOrNextObjs(org.onosproject.net.group.GroupKey key,
                                                 boolean added)