Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 1 | package net.onrc.onos.ofcontroller.flowmanager; |
| 2 | |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 3 | import java.util.ArrayList; |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 4 | import java.util.Collection; |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 5 | import java.util.HashMap; |
| 6 | import java.util.Iterator; |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 7 | import java.util.LinkedList; |
| 8 | import java.util.List; |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 9 | import java.util.Map; |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 10 | |
| 11 | import java.util.concurrent.BlockingQueue; |
| 12 | import java.util.concurrent.LinkedBlockingQueue; |
| 13 | |
| 14 | import net.onrc.onos.datagrid.IDatagridService; |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 15 | import net.onrc.onos.ofcontroller.topology.ShortestPath; |
Pavlin Radoslavov | a23e541 | 2013-10-27 19:56:40 -0700 | [diff] [blame] | 16 | import net.onrc.onos.ofcontroller.topology.Topology; |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 17 | import net.onrc.onos.ofcontroller.topology.TopologyElement; |
Pavlin Radoslavov | 3ecd41e | 2013-10-29 14:29:30 -0700 | [diff] [blame] | 18 | import net.onrc.onos.ofcontroller.topology.TopologyManager; |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 19 | import net.onrc.onos.ofcontroller.util.DataPath; |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 20 | import net.onrc.onos.ofcontroller.util.EventEntry; |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 21 | import net.onrc.onos.ofcontroller.util.FlowEntry; |
| 22 | import net.onrc.onos.ofcontroller.util.FlowEntryAction; |
| 23 | import net.onrc.onos.ofcontroller.util.FlowEntryActions; |
Pavlin Radoslavov | 1c24f22 | 2013-10-30 13:56:46 -0700 | [diff] [blame^] | 24 | import net.onrc.onos.ofcontroller.util.FlowEntryId; |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 25 | import net.onrc.onos.ofcontroller.util.FlowEntryMatch; |
| 26 | import net.onrc.onos.ofcontroller.util.FlowEntrySwitchState; |
| 27 | import net.onrc.onos.ofcontroller.util.FlowEntryUserState; |
Pavlin Radoslavov | 1c24f22 | 2013-10-30 13:56:46 -0700 | [diff] [blame^] | 28 | import net.onrc.onos.ofcontroller.util.FlowId; |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 29 | import net.onrc.onos.ofcontroller.util.FlowPath; |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 30 | import net.onrc.onos.ofcontroller.util.FlowPathUserState; |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 31 | |
| 32 | import org.slf4j.Logger; |
| 33 | import org.slf4j.LoggerFactory; |
| 34 | |
| 35 | /** |
| 36 | * Class for implementing the Path Computation and Path Maintenance. |
| 37 | */ |
Pavlin Radoslavov | 9a85902 | 2013-10-30 10:08:24 -0700 | [diff] [blame] | 38 | class FlowEventHandler extends Thread implements IFlowEventHandlerService { |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 39 | /** The logger. */ |
Pavlin Radoslavov | 9a85902 | 2013-10-30 10:08:24 -0700 | [diff] [blame] | 40 | private final static Logger log = LoggerFactory.getLogger(FlowEventHandler.class); |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 41 | |
| 42 | private FlowManager flowManager; // The Flow Manager to use |
| 43 | private IDatagridService datagridService; // The Datagrid Service to use |
Pavlin Radoslavov | a23e541 | 2013-10-27 19:56:40 -0700 | [diff] [blame] | 44 | private Topology topology; // The network topology |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 45 | private Map<Long, FlowPath> allFlowPaths = new HashMap<Long, FlowPath>(); |
Pavlin Radoslavov | 1c24f22 | 2013-10-30 13:56:46 -0700 | [diff] [blame^] | 46 | private List<FlowEntry> unmatchedFlowEntryUpdates = |
| 47 | new LinkedList<FlowEntry>(); |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 48 | |
| 49 | // The queue with Flow Path and Topology Element updates |
| 50 | private BlockingQueue<EventEntry<?>> networkEvents = |
| 51 | new LinkedBlockingQueue<EventEntry<?>>(); |
| 52 | |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 53 | // The pending Topology, FlowPath, and FlowEntry events |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 54 | private List<EventEntry<TopologyElement>> topologyEvents = |
| 55 | new LinkedList<EventEntry<TopologyElement>>(); |
| 56 | private List<EventEntry<FlowPath>> flowPathEvents = |
| 57 | new LinkedList<EventEntry<FlowPath>>(); |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 58 | private List<EventEntry<FlowEntry>> flowEntryEvents = |
| 59 | new LinkedList<EventEntry<FlowEntry>>(); |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 60 | |
| 61 | /** |
| 62 | * Constructor for a given Flow Manager and Datagrid Service. |
| 63 | * |
| 64 | * @param flowManager the Flow Manager to use. |
| 65 | * @param datagridService the Datagrid Service to use. |
| 66 | */ |
Pavlin Radoslavov | 9a85902 | 2013-10-30 10:08:24 -0700 | [diff] [blame] | 67 | FlowEventHandler(FlowManager flowManager, |
| 68 | IDatagridService datagridService) { |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 69 | this.flowManager = flowManager; |
| 70 | this.datagridService = datagridService; |
Pavlin Radoslavov | a23e541 | 2013-10-27 19:56:40 -0700 | [diff] [blame] | 71 | this.topology = new Topology(); |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Run the thread. |
| 76 | */ |
| 77 | @Override |
| 78 | public void run() { |
| 79 | // |
| 80 | // Obtain the initial Topology state |
| 81 | // |
| 82 | Collection<TopologyElement> topologyElements = |
| 83 | datagridService.getAllTopologyElements(); |
| 84 | for (TopologyElement topologyElement : topologyElements) { |
| 85 | EventEntry<TopologyElement> eventEntry = |
| 86 | new EventEntry<TopologyElement>(EventEntry.Type.ENTRY_ADD, topologyElement); |
| 87 | topologyEvents.add(eventEntry); |
| 88 | } |
| 89 | // |
| 90 | // Obtain the initial Flow Path state |
| 91 | // |
| 92 | Collection<FlowPath> flowPaths = datagridService.getAllFlows(); |
| 93 | for (FlowPath flowPath : flowPaths) { |
| 94 | EventEntry<FlowPath> eventEntry = |
| 95 | new EventEntry<FlowPath>(EventEntry.Type.ENTRY_ADD, flowPath); |
| 96 | flowPathEvents.add(eventEntry); |
| 97 | } |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 98 | // |
| 99 | // Obtain the initial FlowEntry state |
| 100 | // |
| 101 | Collection<FlowEntry> flowEntries = datagridService.getAllFlowEntries(); |
| 102 | for (FlowEntry flowEntry : flowEntries) { |
| 103 | EventEntry<FlowEntry> eventEntry = |
| 104 | new EventEntry<FlowEntry>(EventEntry.Type.ENTRY_ADD, flowEntry); |
| 105 | flowEntryEvents.add(eventEntry); |
| 106 | } |
| 107 | |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 108 | // Process the events (if any) |
| 109 | processEvents(); |
| 110 | |
| 111 | // |
| 112 | // The main loop |
| 113 | // |
| 114 | Collection<EventEntry<?>> collection = new LinkedList<EventEntry<?>>(); |
| 115 | try { |
| 116 | while (true) { |
| 117 | EventEntry<?> eventEntry = networkEvents.take(); |
| 118 | collection.add(eventEntry); |
| 119 | networkEvents.drainTo(collection); |
| 120 | |
Pavlin Radoslavov | ed4c7a9 | 2013-10-26 21:36:21 -0700 | [diff] [blame] | 121 | // |
| 122 | // Demultiplex all events: |
| 123 | // - EventEntry<TopologyElement> |
| 124 | // - EventEntry<FlowPath> |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 125 | // - EventEntry<FlowEntry> |
Pavlin Radoslavov | ed4c7a9 | 2013-10-26 21:36:21 -0700 | [diff] [blame] | 126 | // |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 127 | for (EventEntry<?> event : collection) { |
| 128 | if (event.eventData() instanceof TopologyElement) { |
| 129 | EventEntry<TopologyElement> topologyEventEntry = |
| 130 | (EventEntry<TopologyElement>)event; |
| 131 | topologyEvents.add(topologyEventEntry); |
| 132 | } else if (event.eventData() instanceof FlowPath) { |
| 133 | EventEntry<FlowPath> flowPathEventEntry = |
| 134 | (EventEntry<FlowPath>)event; |
| 135 | flowPathEvents.add(flowPathEventEntry); |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 136 | } else if (event.eventData() instanceof FlowEntry) { |
| 137 | EventEntry<FlowEntry> flowEntryEventEntry = |
| 138 | (EventEntry<FlowEntry>)event; |
| 139 | flowEntryEvents.add(flowEntryEventEntry); |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 140 | } |
| 141 | } |
| 142 | collection.clear(); |
Pavlin Radoslavov | ed4c7a9 | 2013-10-26 21:36:21 -0700 | [diff] [blame] | 143 | |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 144 | // Process the events (if any) |
| 145 | processEvents(); |
| 146 | } |
| 147 | } catch (Exception exception) { |
| 148 | log.debug("Exception processing Network Events: ", exception); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Process the events (if any) |
| 154 | */ |
| 155 | private void processEvents() { |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 156 | List<FlowPath> newFlowPaths = new LinkedList<FlowPath>(); |
| 157 | List<FlowPath> recomputeFlowPaths = new LinkedList<FlowPath>(); |
| 158 | List<FlowPath> modifiedFlowPaths = new LinkedList<FlowPath>(); |
| 159 | |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 160 | if (topologyEvents.isEmpty() && flowPathEvents.isEmpty() && |
| 161 | flowEntryEvents.isEmpty()) { |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 162 | return; // Nothing to do |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 163 | } |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 164 | |
Pavlin Radoslavov | a23e541 | 2013-10-27 19:56:40 -0700 | [diff] [blame] | 165 | // |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 166 | // Process the Flow Path events |
| 167 | // |
| 168 | for (EventEntry<FlowPath> eventEntry : flowPathEvents) { |
| 169 | FlowPath flowPath = eventEntry.eventData(); |
| 170 | |
| 171 | switch (eventEntry.eventType()) { |
| 172 | case ENTRY_ADD: { |
| 173 | // |
| 174 | // Add a new Flow Path |
| 175 | // |
| 176 | if (allFlowPaths.get(flowPath.flowId().value()) != null) { |
| 177 | // |
| 178 | // TODO: What to do if the Flow Path already exists? |
| 179 | // Remove and then re-add it, or merge the info? |
| 180 | // For now, we don't have to do anything. |
| 181 | // |
| 182 | break; |
| 183 | } |
| 184 | |
| 185 | switch (flowPath.flowPathType()) { |
| 186 | case FP_TYPE_SHORTEST_PATH: |
| 187 | // |
| 188 | // Reset the Data Path, in case it was set already, because |
| 189 | // we are going to recompute it anyway. |
| 190 | // |
| 191 | flowPath.flowEntries().clear(); |
| 192 | recomputeFlowPaths.add(flowPath); |
| 193 | break; |
| 194 | case FP_TYPE_EXPLICIT_PATH: |
| 195 | // |
| 196 | // Mark all Flow Entries for installation in the switches. |
| 197 | // |
| 198 | for (FlowEntry flowEntry : flowPath.flowEntries()) { |
| 199 | flowEntry.setFlowEntrySwitchState(FlowEntrySwitchState.FE_SWITCH_NOT_UPDATED); |
| 200 | } |
| 201 | modifiedFlowPaths.add(flowPath); |
| 202 | break; |
| 203 | } |
| 204 | newFlowPaths.add(flowPath); |
| 205 | |
| 206 | break; |
| 207 | } |
| 208 | |
| 209 | case ENTRY_REMOVE: { |
| 210 | // |
| 211 | // Remove an existing Flow Path. |
| 212 | // |
| 213 | // Find the Flow Path, and mark the Flow and its Flow Entries |
| 214 | // for deletion. |
| 215 | // |
| 216 | FlowPath existingFlowPath = |
| 217 | allFlowPaths.get(flowPath.flowId().value()); |
| 218 | if (existingFlowPath == null) |
| 219 | continue; // Nothing to do |
| 220 | |
| 221 | existingFlowPath.setFlowPathUserState(FlowPathUserState.FP_USER_DELETE); |
| 222 | for (FlowEntry flowEntry : existingFlowPath.flowEntries()) { |
| 223 | flowEntry.setFlowEntryUserState(FlowEntryUserState.FE_USER_DELETE); |
| 224 | flowEntry.setFlowEntrySwitchState(FlowEntrySwitchState.FE_SWITCH_NOT_UPDATED); |
| 225 | } |
| 226 | |
| 227 | allFlowPaths.remove(existingFlowPath.flowId()); |
| 228 | modifiedFlowPaths.add(existingFlowPath); |
| 229 | |
| 230 | break; |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | // |
| 236 | // Process the topology events |
Pavlin Radoslavov | a23e541 | 2013-10-27 19:56:40 -0700 | [diff] [blame] | 237 | // |
| 238 | boolean isTopologyModified = false; |
| 239 | for (EventEntry<TopologyElement> eventEntry : topologyEvents) { |
| 240 | TopologyElement topologyElement = eventEntry.eventData(); |
| 241 | switch (eventEntry.eventType()) { |
| 242 | case ENTRY_ADD: |
| 243 | isTopologyModified = topology.addTopologyElement(topologyElement); |
| 244 | break; |
| 245 | case ENTRY_REMOVE: |
| 246 | isTopologyModified = topology.removeTopologyElement(topologyElement); |
| 247 | break; |
| 248 | } |
| 249 | } |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 250 | if (isTopologyModified) { |
| 251 | // TODO: For now, if the topology changes, we recompute all Flows |
| 252 | recomputeFlowPaths.addAll(allFlowPaths.values()); |
| 253 | } |
Pavlin Radoslavov | a23e541 | 2013-10-27 19:56:40 -0700 | [diff] [blame] | 254 | |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 255 | // Add all new Flows |
| 256 | for (FlowPath flowPath : newFlowPaths) { |
| 257 | allFlowPaths.put(flowPath.flowId().value(), flowPath); |
| 258 | } |
| 259 | |
| 260 | // Recompute all affected Flow Paths and keep only the modified |
| 261 | for (FlowPath flowPath : recomputeFlowPaths) { |
| 262 | if (recomputeFlowPath(flowPath)) |
| 263 | modifiedFlowPaths.add(flowPath); |
| 264 | } |
| 265 | |
Pavlin Radoslavov | 3ecd41e | 2013-10-29 14:29:30 -0700 | [diff] [blame] | 266 | // |
Pavlin Radoslavov | 1c24f22 | 2013-10-30 13:56:46 -0700 | [diff] [blame^] | 267 | // Process previously unmatched Flow Entry updates |
| 268 | // |
| 269 | if ((! flowPathEvents.isEmpty()) && (! unmatchedFlowEntryUpdates.isEmpty())) { |
| 270 | List<FlowEntry> remainingUpdates = new LinkedList<FlowEntry>(); |
| 271 | for (FlowEntry flowEntry : unmatchedFlowEntryUpdates) { |
| 272 | if (! updateFlowEntry(flowEntry)) |
| 273 | remainingUpdates.add(flowEntry); |
| 274 | } |
| 275 | unmatchedFlowEntryUpdates = remainingUpdates; |
| 276 | } |
| 277 | |
| 278 | // |
| 279 | // Process the Flow Entry events |
| 280 | // |
| 281 | for (EventEntry<FlowEntry> eventEntry : flowEntryEvents) { |
| 282 | FlowEntry flowEntry = eventEntry.eventData(); |
| 283 | switch (eventEntry.eventType()) { |
| 284 | case ENTRY_ADD: |
| 285 | // |
| 286 | // Find the corresponding Flow Entry and update it. |
| 287 | // If not found, then keep it in a local cache for |
| 288 | // later matching. |
| 289 | // |
| 290 | if (! updateFlowEntry(flowEntry)) |
| 291 | unmatchedFlowEntryUpdates.add(flowEntry); |
| 292 | break; |
| 293 | case ENTRY_REMOVE: |
| 294 | // |
| 295 | // NOTE: For now we remove the Flow Entries based on |
| 296 | // local decisions, so no need to remove them because of an |
| 297 | // external event. |
| 298 | // |
| 299 | break; |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | // |
Pavlin Radoslavov | 3ecd41e | 2013-10-29 14:29:30 -0700 | [diff] [blame] | 304 | // Push the Flow Entries that have been modified |
| 305 | // |
Pavlin Radoslavov | ebc8b19 | 2013-10-29 15:35:35 -0700 | [diff] [blame] | 306 | flowManager.pushModifiedFlowEntries(modifiedFlowPaths); |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 307 | |
Pavlin Radoslavov | ed4c7a9 | 2013-10-26 21:36:21 -0700 | [diff] [blame] | 308 | // Cleanup |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 309 | topologyEvents.clear(); |
| 310 | flowPathEvents.clear(); |
Pavlin Radoslavov | 1c24f22 | 2013-10-30 13:56:46 -0700 | [diff] [blame^] | 311 | flowEntryEvents.clear(); |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * Update a Flow Entry because of an external event. |
| 316 | * |
| 317 | * @param flowEntry the FlowEntry with the new state. |
| 318 | * @return true if the Flow Entry was found and updated, otherwise false. |
| 319 | */ |
| 320 | private boolean updateFlowEntry(FlowEntry flowEntry) { |
| 321 | if ((! flowEntry.isValidFlowId()) || |
| 322 | (! flowEntry.isValidFlowEntryId())) { |
| 323 | // |
| 324 | // Ignore events for Flow Entries with invalid Flow ID or |
| 325 | // Flow Entry ID. |
| 326 | // This shouldn't happen. |
| 327 | // |
| 328 | return true; |
| 329 | } |
| 330 | |
| 331 | FlowPath flowPath = allFlowPaths.get(flowEntry.flowId().value()); |
| 332 | if (flowPath == null) |
| 333 | return false; |
| 334 | |
| 335 | // |
| 336 | // Iterate over all Flow Entries and find a match based on the DPID |
| 337 | // |
| 338 | for (FlowEntry localFlowEntry : flowPath.flowEntries()) { |
| 339 | if (localFlowEntry.dpid().value() != flowEntry.dpid().value()) |
| 340 | continue; |
| 341 | // |
| 342 | // TODO: We might want to check the FlowEntryMatch and |
| 343 | // FlowEntryActions to double-check it is the same Flow Entry |
| 344 | // |
| 345 | |
| 346 | // |
| 347 | // Local Flow Entry match found |
| 348 | // |
| 349 | if (localFlowEntry.isValidFlowEntryId()) { |
| 350 | if (localFlowEntry.flowEntryId().value() != |
| 351 | flowEntry.flowEntryId().value()) { |
| 352 | // |
| 353 | // Find a local Flow Entry, but the Flow Entry ID doesn't |
| 354 | // match. Ignore the event. |
| 355 | // |
| 356 | return true; |
| 357 | } |
| 358 | } else { |
| 359 | // Update the Flow Entry ID |
| 360 | FlowEntryId flowEntryId = |
| 361 | new FlowEntryId(flowEntry.flowEntryId().value()); |
| 362 | localFlowEntry.setFlowEntryId(flowEntryId); |
| 363 | } |
| 364 | |
| 365 | // |
| 366 | // Update the local Flow Entry. |
| 367 | // For now we update only the Flow Entry Switch State |
| 368 | // |
| 369 | localFlowEntry.setFlowEntrySwitchState(flowEntry.flowEntrySwitchState()); |
| 370 | return true; |
| 371 | } |
| 372 | |
| 373 | return false; // Entry not found |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | /** |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 377 | * Recompute a Flow Path. |
| 378 | * |
| 379 | * @param flowPath the Flow Path to recompute. |
| 380 | * @return true if the recomputed Flow Path has changed, otherwise false. |
| 381 | */ |
| 382 | private boolean recomputeFlowPath(FlowPath flowPath) { |
| 383 | boolean hasChanged = false; |
| 384 | |
| 385 | // |
| 386 | // Test whether the Flow Path needs to be recomputed |
| 387 | // |
| 388 | switch (flowPath.flowPathType()) { |
| 389 | case FP_TYPE_SHORTEST_PATH: |
| 390 | break; |
| 391 | case FP_TYPE_EXPLICIT_PATH: |
| 392 | return false; // An explicit path never changes |
| 393 | } |
| 394 | |
| 395 | DataPath oldDataPath = flowPath.dataPath(); |
| 396 | |
Pavlin Radoslavov | 3ecd41e | 2013-10-29 14:29:30 -0700 | [diff] [blame] | 397 | // Compute the new path |
| 398 | DataPath newDataPath = TopologyManager.computeNetworkPath(topology, |
| 399 | flowPath); |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 400 | if (newDataPath == null) { |
| 401 | // We need the DataPath to compare the paths |
| 402 | newDataPath = new DataPath(); |
| 403 | } |
| 404 | newDataPath.applyFlowPathFlags(flowPath.flowPathFlags()); |
| 405 | |
| 406 | // |
Pavlin Radoslavov | 3ecd41e | 2013-10-29 14:29:30 -0700 | [diff] [blame] | 407 | // Test whether the new path is same |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 408 | // |
| 409 | if (oldDataPath.flowEntries().size() != |
| 410 | newDataPath.flowEntries().size()) { |
| 411 | hasChanged = true; |
| 412 | } else { |
| 413 | Iterator<FlowEntry> oldIter = oldDataPath.flowEntries().iterator(); |
| 414 | Iterator<FlowEntry> newIter = newDataPath.flowEntries().iterator(); |
| 415 | while (oldIter.hasNext() && newIter.hasNext()) { |
| 416 | FlowEntry oldFlowEntry = oldIter.next(); |
| 417 | FlowEntry newFlowEntry = newIter.next(); |
Pavlin Radoslavov | 3ecd41e | 2013-10-29 14:29:30 -0700 | [diff] [blame] | 418 | if (! TopologyManager.isSameFlowEntryDataPath(oldFlowEntry, |
| 419 | newFlowEntry)) { |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 420 | hasChanged = true; |
| 421 | break; |
| 422 | } |
| 423 | } |
| 424 | } |
| 425 | if (! hasChanged) |
| 426 | return hasChanged; |
| 427 | |
| 428 | // |
Pavlin Radoslavov | 3ecd41e | 2013-10-29 14:29:30 -0700 | [diff] [blame] | 429 | // Merge the changes in the path: |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 430 | // - If a Flow Entry for a switch is in the old data path, but not |
| 431 | // in the new data path, then mark it for deletion. |
| 432 | // - If a Flow Entry for a switch is in the new data path, but not |
| 433 | // in the old data path, then mark it for addition. |
| 434 | // - If a Flow Entry for a switch is in both the old and the new |
| 435 | // data path, but it has changed, e.g., the incoming and/or outgoing |
| 436 | // port(s), then mark the old Flow Entry for deletion, and mark |
| 437 | // the new Flow Entry for addition. |
| 438 | // - If a Flow Entry for a switch is in both the old and the new |
| 439 | // data path, and it hasn't changed, then just keep it. |
| 440 | // |
| 441 | // NOTE: We use the Switch DPID of each entry to match the entries |
| 442 | // |
| 443 | Map<Long, FlowEntry> oldFlowEntriesMap = new HashMap<Long, FlowEntry>(); |
| 444 | Map<Long, FlowEntry> newFlowEntriesMap = new HashMap<Long, FlowEntry>(); |
| 445 | ArrayList<FlowEntry> finalFlowEntries = new ArrayList<FlowEntry>(); |
| 446 | List<FlowEntry> deletedFlowEntries = new LinkedList<FlowEntry>(); |
| 447 | |
| 448 | // Prepare maps with the Flow Entries, so they are fast to lookup |
| 449 | for (FlowEntry flowEntry : oldDataPath.flowEntries()) |
| 450 | oldFlowEntriesMap.put(flowEntry.dpid().value(), flowEntry); |
| 451 | for (FlowEntry flowEntry : newDataPath.flowEntries()) |
| 452 | newFlowEntriesMap.put(flowEntry.dpid().value(), flowEntry); |
| 453 | |
| 454 | // |
| 455 | // Find the old Flow Entries that should be deleted |
| 456 | // |
| 457 | for (FlowEntry oldFlowEntry : oldDataPath.flowEntries()) { |
| 458 | FlowEntry newFlowEntry = |
| 459 | newFlowEntriesMap.get(oldFlowEntry.dpid().value()); |
| 460 | if (newFlowEntry == null) { |
| 461 | // The old Flow Entry should be deleted |
| 462 | oldFlowEntry.setFlowEntryUserState(FlowEntryUserState.FE_USER_DELETE); |
| 463 | oldFlowEntry.setFlowEntrySwitchState(FlowEntrySwitchState.FE_SWITCH_NOT_UPDATED); |
| 464 | deletedFlowEntries.add(oldFlowEntry); |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | // |
| 469 | // Find the new Flow Entries that should be added or updated |
| 470 | // |
| 471 | int idx = 0; |
| 472 | for (FlowEntry newFlowEntry : newDataPath.flowEntries()) { |
| 473 | FlowEntry oldFlowEntry = |
| 474 | oldFlowEntriesMap.get(newFlowEntry.dpid().value()); |
| 475 | |
| 476 | if ((oldFlowEntry != null) && |
Pavlin Radoslavov | 3ecd41e | 2013-10-29 14:29:30 -0700 | [diff] [blame] | 477 | TopologyManager.isSameFlowEntryDataPath(oldFlowEntry, |
| 478 | newFlowEntry)) { |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 479 | // |
| 480 | // Both Flow Entries are same |
| 481 | // |
| 482 | finalFlowEntries.add(oldFlowEntry); |
| 483 | idx++; |
| 484 | continue; |
| 485 | } |
| 486 | |
| 487 | if (oldFlowEntry != null) { |
| 488 | // |
| 489 | // The old Flow Entry should be deleted |
| 490 | // |
| 491 | oldFlowEntry.setFlowEntryUserState(FlowEntryUserState.FE_USER_DELETE); |
| 492 | oldFlowEntry.setFlowEntrySwitchState(FlowEntrySwitchState.FE_SWITCH_NOT_UPDATED); |
| 493 | deletedFlowEntries.add(oldFlowEntry); |
| 494 | } |
| 495 | |
| 496 | // |
| 497 | // Add the new Flow Entry |
| 498 | // |
Pavlin Radoslavov | 1c24f22 | 2013-10-30 13:56:46 -0700 | [diff] [blame^] | 499 | // |
| 500 | // NOTE: Assign only the Flow ID. |
| 501 | // The Flow Entry ID is assigned later only for the Flow Entries |
| 502 | // this instance is responsible for. |
| 503 | // |
| 504 | newFlowEntry.setFlowId(new FlowId(flowPath.flowId().value())); |
Pavlin Radoslavov | fb06a9e | 2013-10-28 23:56:15 -0700 | [diff] [blame] | 505 | |
| 506 | // Set the incoming port matching |
| 507 | FlowEntryMatch flowEntryMatch = new FlowEntryMatch(); |
| 508 | newFlowEntry.setFlowEntryMatch(flowEntryMatch); |
| 509 | flowEntryMatch.enableInPort(newFlowEntry.inPort()); |
| 510 | |
| 511 | // |
| 512 | // Set the actions: |
| 513 | // If the first Flow Entry, copy the Flow Path actions to it. |
| 514 | // |
| 515 | FlowEntryActions flowEntryActions = newFlowEntry.flowEntryActions(); |
| 516 | if ((idx == 0) && (flowPath.flowEntryActions() != null)) { |
| 517 | FlowEntryActions flowActions = |
| 518 | new FlowEntryActions(flowPath.flowEntryActions()); |
| 519 | for (FlowEntryAction action : flowActions.actions()) |
| 520 | flowEntryActions.addAction(action); |
| 521 | } |
| 522 | idx++; |
| 523 | |
| 524 | // |
| 525 | // Add the outgoing port output action |
| 526 | // |
| 527 | FlowEntryAction flowEntryAction = new FlowEntryAction(); |
| 528 | flowEntryAction.setActionOutput(newFlowEntry.outPort()); |
| 529 | flowEntryActions.addAction(flowEntryAction); |
| 530 | |
| 531 | // |
| 532 | // Set the state of the new Flow Entry |
| 533 | // |
| 534 | newFlowEntry.setFlowEntryUserState(FlowEntryUserState.FE_USER_ADD); |
| 535 | newFlowEntry.setFlowEntrySwitchState(FlowEntrySwitchState.FE_SWITCH_NOT_UPDATED); |
| 536 | finalFlowEntries.add(newFlowEntry); |
| 537 | } |
| 538 | |
| 539 | // |
| 540 | // Replace the old Flow Entries with the new Flow Entries. |
| 541 | // Note that the Flow Entries that will be deleted are added at |
| 542 | // the end. |
| 543 | // |
| 544 | for (FlowEntry flowEntry : deletedFlowEntries) |
| 545 | finalFlowEntries.add(flowEntry); |
| 546 | flowPath.dataPath().setFlowEntries(finalFlowEntries); |
| 547 | |
| 548 | return hasChanged; |
| 549 | } |
| 550 | |
| 551 | /** |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 552 | * Receive a notification that a Flow is added. |
| 553 | * |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 554 | * @param flowPath the Flow that is added. |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 555 | */ |
| 556 | @Override |
| 557 | public void notificationRecvFlowAdded(FlowPath flowPath) { |
| 558 | EventEntry<FlowPath> eventEntry = |
| 559 | new EventEntry<FlowPath>(EventEntry.Type.ENTRY_ADD, flowPath); |
| 560 | networkEvents.add(eventEntry); |
| 561 | } |
| 562 | |
| 563 | /** |
| 564 | * Receive a notification that a Flow is removed. |
| 565 | * |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 566 | * @param flowPath the Flow that is removed. |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 567 | */ |
| 568 | @Override |
| 569 | public void notificationRecvFlowRemoved(FlowPath flowPath) { |
| 570 | EventEntry<FlowPath> eventEntry = |
| 571 | new EventEntry<FlowPath>(EventEntry.Type.ENTRY_REMOVE, flowPath); |
| 572 | networkEvents.add(eventEntry); |
| 573 | } |
| 574 | |
| 575 | /** |
| 576 | * Receive a notification that a Flow is updated. |
| 577 | * |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 578 | * @param flowPath the Flow that is updated. |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 579 | */ |
| 580 | @Override |
| 581 | public void notificationRecvFlowUpdated(FlowPath flowPath) { |
| 582 | // NOTE: The ADD and UPDATE events are processed in same way |
| 583 | EventEntry<FlowPath> eventEntry = |
| 584 | new EventEntry<FlowPath>(EventEntry.Type.ENTRY_ADD, flowPath); |
| 585 | networkEvents.add(eventEntry); |
| 586 | } |
| 587 | |
| 588 | /** |
Pavlin Radoslavov | b750684 | 2013-10-29 17:46:54 -0700 | [diff] [blame] | 589 | * Receive a notification that a FlowEntry is added. |
| 590 | * |
| 591 | * @param flowEntry the FlowEntry that is added. |
| 592 | */ |
| 593 | @Override |
| 594 | public void notificationRecvFlowEntryAdded(FlowEntry flowEntry) { |
| 595 | EventEntry<FlowEntry> eventEntry = |
| 596 | new EventEntry<FlowEntry>(EventEntry.Type.ENTRY_ADD, flowEntry); |
| 597 | networkEvents.add(eventEntry); |
| 598 | } |
| 599 | |
| 600 | /** |
| 601 | * Receive a notification that a FlowEntry is removed. |
| 602 | * |
| 603 | * @param flowEntry the FlowEntry that is removed. |
| 604 | */ |
| 605 | @Override |
| 606 | public void notificationRecvFlowEntryRemoved(FlowEntry flowEntry) { |
| 607 | EventEntry<FlowEntry> eventEntry = |
| 608 | new EventEntry<FlowEntry>(EventEntry.Type.ENTRY_REMOVE, flowEntry); |
| 609 | networkEvents.add(eventEntry); |
| 610 | } |
| 611 | |
| 612 | /** |
| 613 | * Receive a notification that a FlowEntry is updated. |
| 614 | * |
| 615 | * @param flowEntry the FlowEntry that is updated. |
| 616 | */ |
| 617 | @Override |
| 618 | public void notificationRecvFlowEntryUpdated(FlowEntry flowEntry) { |
| 619 | // NOTE: The ADD and UPDATE events are processed in same way |
| 620 | EventEntry<FlowEntry> eventEntry = |
| 621 | new EventEntry<FlowEntry>(EventEntry.Type.ENTRY_ADD, flowEntry); |
| 622 | networkEvents.add(eventEntry); |
| 623 | } |
| 624 | |
| 625 | /** |
Pavlin Radoslavov | 6b79f2b | 2013-10-26 21:31:10 -0700 | [diff] [blame] | 626 | * Receive a notification that a Topology Element is added. |
| 627 | * |
| 628 | * @param topologyElement the Topology Element that is added. |
| 629 | */ |
| 630 | @Override |
| 631 | public void notificationRecvTopologyElementAdded(TopologyElement topologyElement) { |
| 632 | EventEntry<TopologyElement> eventEntry = |
| 633 | new EventEntry<TopologyElement>(EventEntry.Type.ENTRY_ADD, topologyElement); |
| 634 | networkEvents.add(eventEntry); |
| 635 | } |
| 636 | |
| 637 | /** |
| 638 | * Receive a notification that a Topology Element is removed. |
| 639 | * |
| 640 | * @param topologyElement the Topology Element that is removed. |
| 641 | */ |
| 642 | @Override |
| 643 | public void notificationRecvTopologyElementRemoved(TopologyElement topologyElement) { |
| 644 | EventEntry<TopologyElement> eventEntry = |
| 645 | new EventEntry<TopologyElement>(EventEntry.Type.ENTRY_REMOVE, topologyElement); |
| 646 | networkEvents.add(eventEntry); |
| 647 | } |
| 648 | |
| 649 | /** |
| 650 | * Receive a notification that a Topology Element is updated. |
| 651 | * |
| 652 | * @param topologyElement the Topology Element that is updated. |
| 653 | */ |
| 654 | @Override |
| 655 | public void notificationRecvTopologyElementUpdated(TopologyElement topologyElement) { |
| 656 | // NOTE: The ADD and UPDATE events are processed in same way |
| 657 | EventEntry<TopologyElement> eventEntry = |
| 658 | new EventEntry<TopologyElement>(EventEntry.Type.ENTRY_ADD, topologyElement); |
| 659 | networkEvents.add(eventEntry); |
| 660 | } |
| 661 | } |