Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.grouphandler; |
| 17 | |
| 18 | import static com.google.common.base.Preconditions.checkNotNull; |
| 19 | import static org.slf4j.LoggerFactory.getLogger; |
| 20 | |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 21 | import java.net.URI; |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 22 | import java.util.ArrayList; |
| 23 | import java.util.Arrays; |
| 24 | import java.util.HashMap; |
| 25 | import java.util.HashSet; |
| 26 | import java.util.List; |
| 27 | import java.util.Set; |
| 28 | |
| 29 | import org.onlab.packet.MacAddress; |
sangho | 32a5932 | 2015-02-17 12:07:41 -0800 | [diff] [blame] | 30 | import org.onlab.packet.MplsLabel; |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 31 | import org.onlab.util.KryoNamespace; |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 32 | import org.onosproject.core.ApplicationId; |
| 33 | import org.onosproject.net.DeviceId; |
| 34 | import org.onosproject.net.Link; |
| 35 | import org.onosproject.net.PortNumber; |
| 36 | import org.onosproject.net.flow.DefaultTrafficTreatment; |
| 37 | import org.onosproject.net.flow.TrafficTreatment; |
| 38 | import org.onosproject.net.group.DefaultGroupBucket; |
| 39 | import org.onosproject.net.group.DefaultGroupDescription; |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 40 | import org.onosproject.net.group.DefaultGroupKey; |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 41 | import org.onosproject.net.group.Group; |
| 42 | import org.onosproject.net.group.GroupBucket; |
| 43 | import org.onosproject.net.group.GroupBuckets; |
| 44 | import org.onosproject.net.group.GroupDescription; |
| 45 | import org.onosproject.net.group.GroupEvent; |
| 46 | import org.onosproject.net.group.GroupKey; |
| 47 | import org.onosproject.net.group.GroupListener; |
| 48 | import org.onosproject.net.group.GroupService; |
| 49 | import org.onosproject.net.link.LinkService; |
| 50 | import org.slf4j.Logger; |
| 51 | |
| 52 | /** |
| 53 | * Default ECMP group handler creation module. This |
| 54 | * component creates a set of ECMP groups for every neighbor |
| 55 | * that this device is connected to based on whether the |
| 56 | * current device is an edge device or a transit device. |
| 57 | */ |
| 58 | public class DefaultGroupHandler { |
| 59 | protected final Logger log = getLogger(getClass()); |
| 60 | |
| 61 | protected final DeviceId deviceId; |
| 62 | protected final ApplicationId appId; |
| 63 | protected final DeviceProperties deviceConfig; |
| 64 | protected final List<Integer> allSegmentIds; |
| 65 | protected final int nodeSegmentId; |
| 66 | protected final boolean isEdgeRouter; |
| 67 | protected final MacAddress nodeMacAddr; |
| 68 | protected LinkService linkService; |
| 69 | protected GroupService groupService; |
| 70 | |
| 71 | protected HashMap<DeviceId, Set<PortNumber>> devicePortMap = |
| 72 | new HashMap<DeviceId, Set<PortNumber>>(); |
| 73 | protected HashMap<PortNumber, DeviceId> portDeviceMap = |
| 74 | new HashMap<PortNumber, DeviceId>(); |
| 75 | |
| 76 | private GroupListener listener = new InternalGroupListener(); |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 77 | protected KryoNamespace.Builder kryo = new KryoNamespace.Builder() |
| 78 | .register(URI.class) |
| 79 | .register(HashSet.class) |
| 80 | .register(DeviceId.class) |
| 81 | .register(PortNumber.class) |
| 82 | .register(NeighborSet.class) |
| 83 | .register(PolicyGroupIdentifier.class) |
| 84 | .register(PolicyGroupParams.class) |
| 85 | .register(GroupBucketIdentifier.class) |
| 86 | .register(GroupBucketIdentifier.BucketOutputType.class); |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 87 | |
| 88 | protected DefaultGroupHandler(DeviceId deviceId, |
| 89 | ApplicationId appId, |
| 90 | DeviceProperties config, |
| 91 | LinkService linkService, |
| 92 | GroupService groupService) { |
| 93 | this.deviceId = checkNotNull(deviceId); |
| 94 | this.appId = checkNotNull(appId); |
| 95 | this.deviceConfig = checkNotNull(config); |
| 96 | this.linkService = checkNotNull(linkService); |
| 97 | this.groupService = checkNotNull(groupService); |
| 98 | allSegmentIds = checkNotNull(config.getAllDeviceSegmentIds()); |
| 99 | nodeSegmentId = config.getSegmentId(deviceId); |
| 100 | isEdgeRouter = config.isEdgeDevice(deviceId); |
| 101 | nodeMacAddr = checkNotNull(config.getDeviceMac(deviceId)); |
| 102 | |
| 103 | this.groupService.addListener(listener); |
| 104 | |
| 105 | populateNeighborMaps(); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Creates a group handler object based on the type of device. If |
| 110 | * device is of edge type it returns edge group handler, else it |
| 111 | * returns transit group handler. |
| 112 | * |
| 113 | * @param deviceId device identifier |
| 114 | * @param appId application identifier |
| 115 | * @param config interface to retrieve the device properties |
| 116 | * @param linkService link service object |
| 117 | * @param groupService group service object |
| 118 | * @return default group handler type |
| 119 | */ |
| 120 | public static DefaultGroupHandler createGroupHandler(DeviceId deviceId, |
| 121 | ApplicationId appId, |
| 122 | DeviceProperties config, |
| 123 | LinkService linkService, |
| 124 | GroupService groupService) { |
| 125 | if (config.isEdgeDevice(deviceId)) { |
| 126 | return new DefaultEdgeGroupHandler(deviceId, |
| 127 | appId, |
| 128 | config, |
| 129 | linkService, |
| 130 | groupService); |
| 131 | } else { |
| 132 | return new DefaultTransitGroupHandler(deviceId, |
| 133 | appId, |
| 134 | config, |
| 135 | linkService, |
| 136 | groupService); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Creates the auto created groups for this device based on the |
| 142 | * current snapshot of the topology. |
| 143 | */ |
| 144 | //Empty implementations to be overridden by derived classes |
| 145 | public void createGroups() { |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Performs group creation or update procedures when a new link |
| 150 | * is discovered on this device. |
| 151 | * |
| 152 | * @param newLink new neighbor link |
| 153 | */ |
| 154 | public void linkUp(Link newLink) { |
| 155 | if (newLink.type() != Link.Type.DIRECT) { |
| 156 | log.warn("linkUp: unknown link type"); |
| 157 | return; |
| 158 | } |
| 159 | |
| 160 | if (!newLink.src().deviceId().equals(deviceId)) { |
| 161 | log.warn("linkUp: deviceId{} doesn't match with link src{}", |
| 162 | deviceId, |
| 163 | newLink.src().deviceId()); |
| 164 | return; |
| 165 | } |
| 166 | |
| 167 | log.debug("Device {} linkUp at local port {} to neighbor {}", |
| 168 | deviceId, newLink.src().port(), newLink.dst().deviceId()); |
| 169 | if (devicePortMap.get(newLink.dst().deviceId()) == null) { |
| 170 | // New Neighbor |
| 171 | newNeighbor(newLink); |
| 172 | } else { |
| 173 | // Old Neighbor |
| 174 | newPortToExistingNeighbor(newLink); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * Performs group recovery procedures when a port goes down |
| 180 | * on this device. |
| 181 | * |
| 182 | * @param port port number that has gone down |
| 183 | */ |
| 184 | public void portDown(PortNumber port) { |
| 185 | if (portDeviceMap.get(port) == null) { |
| 186 | log.warn("portDown: unknown port"); |
| 187 | return; |
| 188 | } |
| 189 | log.debug("Device {} portDown {} to neighbor {}", |
| 190 | deviceId, port, portDeviceMap.get(port)); |
| 191 | Set<NeighborSet> nsSet = computeImpactedNeighborsetForPortEvent( |
| 192 | portDeviceMap.get(port), |
| 193 | devicePortMap.keySet()); |
| 194 | for (NeighborSet ns : nsSet) { |
| 195 | // Create the bucket to be removed |
| 196 | TrafficTreatment.Builder tBuilder = |
| 197 | DefaultTrafficTreatment.builder(); |
| 198 | tBuilder.setOutput(port) |
| 199 | .setEthDst(deviceConfig.getDeviceMac( |
| 200 | portDeviceMap.get(port))) |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 201 | .setEthSrc(nodeMacAddr); |
| 202 | if (ns.getEdgeLabel() != NeighborSet.NO_EDGE_LABEL) { |
| 203 | tBuilder.pushMpls() |
sangho | 32a5932 | 2015-02-17 12:07:41 -0800 | [diff] [blame] | 204 | .setMpls(MplsLabel.mplsLabel(ns.getEdgeLabel())); |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 205 | } |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 206 | GroupBucket removeBucket = DefaultGroupBucket. |
| 207 | createSelectGroupBucket(tBuilder.build()); |
| 208 | GroupBuckets removeBuckets = new GroupBuckets( |
| 209 | Arrays.asList(removeBucket)); |
| 210 | log.debug("portDown in device{}: " |
| 211 | + "groupService.removeBucketsFromGroup " |
| 212 | + "for neighborset{}", deviceId, ns); |
| 213 | groupService.removeBucketsFromGroup(deviceId, |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 214 | getGroupKey(ns), |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 215 | removeBuckets, |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 216 | getGroupKey(ns), |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 217 | appId); |
| 218 | } |
| 219 | |
| 220 | devicePortMap.get(portDeviceMap.get(port)).remove(port); |
| 221 | portDeviceMap.remove(port); |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * Returns a group associated with the key. |
| 226 | * |
| 227 | * @param key cookie associated with the group |
| 228 | * @return group if found or null |
| 229 | */ |
| 230 | public Group getGroup(GroupKey key) { |
| 231 | return groupService.getGroup(deviceId, key); |
| 232 | } |
| 233 | |
| 234 | //Empty implementation |
| 235 | protected void newNeighbor(Link newLink) { |
| 236 | } |
| 237 | |
| 238 | //Empty implementation |
| 239 | protected void newPortToExistingNeighbor(Link newLink) { |
| 240 | } |
| 241 | |
| 242 | //Empty implementation |
| 243 | protected Set<NeighborSet> computeImpactedNeighborsetForPortEvent( |
| 244 | DeviceId impactedNeighbor, |
| 245 | Set<DeviceId> updatedNeighbors) { |
| 246 | return null; |
| 247 | } |
| 248 | |
| 249 | private void populateNeighborMaps() { |
| 250 | Set<Link> outgoingLinks = linkService.getDeviceEgressLinks(deviceId); |
| 251 | for (Link link:outgoingLinks) { |
| 252 | if (link.type() != Link.Type.DIRECT) { |
| 253 | continue; |
| 254 | } |
| 255 | addNeighborAtPort(link.dst().deviceId(), link.src().port()); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | protected void addNeighborAtPort(DeviceId neighborId, PortNumber portToNeighbor) { |
| 260 | // Update DeviceToPort database |
| 261 | log.debug("Device {} addNeighborAtPort: neighbor {} at port {}", |
| 262 | deviceId, neighborId, portToNeighbor); |
| 263 | if (devicePortMap.get(neighborId) != null) { |
| 264 | devicePortMap.get(neighborId).add(portToNeighbor); |
| 265 | } else { |
| 266 | Set<PortNumber> ports = new HashSet<PortNumber>(); |
| 267 | ports.add(portToNeighbor); |
| 268 | devicePortMap.put(neighborId, ports); |
| 269 | } |
| 270 | |
| 271 | // Update portToDevice database |
| 272 | if (portDeviceMap.get(portToNeighbor) == null) { |
| 273 | portDeviceMap.put(portToNeighbor, neighborId); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | protected Set<Set<DeviceId>> |
| 278 | getPowerSetOfNeighbors(Set<DeviceId> neighbors) { |
| 279 | List<DeviceId> list = new ArrayList<DeviceId>(neighbors); |
| 280 | Set<Set<DeviceId>> sets = new HashSet<Set<DeviceId>>(); |
| 281 | // get the number of elements in the neighbors |
| 282 | int elements = list.size(); |
| 283 | // the number of members of a power set is 2^n |
| 284 | // including the empty set |
| 285 | int powerElements = (1 << elements); |
| 286 | |
| 287 | // run a binary counter for the number of power elements |
| 288 | // NOTE: Exclude empty set |
| 289 | for (long i = 1; i < powerElements; i++) { |
| 290 | Set<DeviceId> neighborSubSet = new HashSet<DeviceId>(); |
| 291 | for (int j = 0; j < elements; j++) { |
| 292 | if ((i >> j) % 2 == 1) { |
| 293 | neighborSubSet.add(list.get(j)); |
| 294 | } |
| 295 | } |
| 296 | sets.add(neighborSubSet); |
| 297 | } |
| 298 | return sets; |
| 299 | } |
| 300 | |
| 301 | private boolean isSegmentIdSameAsNodeSegmentId(DeviceId deviceId, int sId) { |
| 302 | return (deviceConfig.getSegmentId(deviceId) == sId); |
| 303 | } |
| 304 | |
| 305 | protected List<Integer> getSegmentIdsTobePairedWithNeighborSet( |
| 306 | Set<DeviceId> neighbors) { |
| 307 | |
| 308 | List<Integer> nsSegmentIds = new ArrayList<Integer>(); |
| 309 | |
| 310 | // Add one entry for "no label" (-1) to the list if |
| 311 | // dpid list has not more than one node/neighbor as |
| 312 | // there will never be a case a packet going to more than one |
| 313 | // neighbor without a label at an edge router |
| 314 | if (neighbors.size() == 1) { |
| 315 | nsSegmentIds.add(-1); |
| 316 | } |
| 317 | // Filter out SegmentIds matching with the |
| 318 | // nodes in the combo |
| 319 | for (Integer sId : allSegmentIds) { |
| 320 | if (sId.equals(nodeSegmentId)) { |
| 321 | continue; |
| 322 | } |
| 323 | boolean filterOut = false; |
| 324 | // Check if the edge label being set is of |
| 325 | // any node in the Neighbor set |
| 326 | for (DeviceId deviceId : neighbors) { |
| 327 | if (isSegmentIdSameAsNodeSegmentId(deviceId, sId)) { |
| 328 | filterOut = true; |
| 329 | break; |
| 330 | } |
| 331 | } |
| 332 | if (!filterOut) { |
| 333 | nsSegmentIds.add(sId); |
| 334 | } |
| 335 | } |
| 336 | return nsSegmentIds; |
| 337 | } |
| 338 | |
| 339 | protected void createGroupsFromNeighborsets(Set<NeighborSet> nsSet) { |
| 340 | for (NeighborSet ns : nsSet) { |
| 341 | // Create the bucket array from the neighbor set |
| 342 | List<GroupBucket> buckets = new ArrayList<GroupBucket>(); |
| 343 | for (DeviceId d : ns.getDeviceIds()) { |
| 344 | for (PortNumber sp : devicePortMap.get(d)) { |
| 345 | TrafficTreatment.Builder tBuilder = |
| 346 | DefaultTrafficTreatment.builder(); |
| 347 | tBuilder.setOutput(sp) |
| 348 | .setEthDst(deviceConfig.getDeviceMac(d)) |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 349 | .setEthSrc(nodeMacAddr); |
| 350 | if (ns.getEdgeLabel() != NeighborSet.NO_EDGE_LABEL) { |
| 351 | tBuilder.pushMpls() |
| 352 | .setMpls(MplsLabel. |
| 353 | mplsLabel(ns.getEdgeLabel())); |
| 354 | } |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 355 | buckets.add(DefaultGroupBucket.createSelectGroupBucket( |
| 356 | tBuilder.build())); |
| 357 | } |
| 358 | } |
| 359 | GroupBuckets groupBuckets = new GroupBuckets(buckets); |
| 360 | GroupDescription newGroupDesc = new DefaultGroupDescription( |
| 361 | deviceId, |
| 362 | Group.Type.SELECT, |
| 363 | groupBuckets, |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 364 | getGroupKey(ns), |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 365 | appId); |
| 366 | log.debug("createGroupsFromNeighborsets: " |
| 367 | + "groupService.addGroup for neighborset{}", ns); |
| 368 | groupService.addGroup(newGroupDesc); |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | protected void handleGroupEvent(GroupEvent event) { |
| 373 | switch (event.type()) { |
| 374 | case GROUP_ADDED: |
| 375 | log.debug("Received GROUP_ADDED from group service " |
| 376 | + "for device {} with group key{} with id{}", |
| 377 | event.subject().deviceId(), |
| 378 | event.subject().appCookie(), |
| 379 | event.subject().id()); |
| 380 | break; |
| 381 | case GROUP_UPDATED: |
| 382 | log.trace("Received GROUP_UPDATED from group service " |
| 383 | + "for device {} with group key{} with id{}", |
| 384 | event.subject().deviceId(), |
| 385 | event.subject().appCookie(), |
| 386 | event.subject().id()); |
| 387 | break; |
| 388 | case GROUP_REMOVED: |
| 389 | log.debug("Received GROUP_REMOVED from group service " |
| 390 | + "for device {} with group key{} with id{}", |
| 391 | event.subject().deviceId(), |
| 392 | event.subject().appCookie(), |
| 393 | event.subject().id()); |
| 394 | break; |
| 395 | default: |
| 396 | break; |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | private class InternalGroupListener implements GroupListener { |
| 401 | |
| 402 | @Override |
| 403 | public void event(GroupEvent event) { |
| 404 | handleGroupEvent(event); |
| 405 | } |
| 406 | } |
Srikanth Vavilapalli | 717361f | 2015-03-16 12:06:04 -0700 | [diff] [blame^] | 407 | |
| 408 | protected GroupKey getGroupKey(Object obj) { |
| 409 | return new DefaultGroupKey(kryo.build().serialize(obj)); |
| 410 | } |
Srikanth Vavilapalli | ed12ae5 | 2015-02-09 14:43:19 -0800 | [diff] [blame] | 411 | } |