Carmelo Cascone | 98dfdb7 | 2017-07-14 12:01:37 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017-present 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 | |
| 17 | package org.onosproject.p4runtime.ctl; |
| 18 | |
| 19 | |
| 20 | import com.google.common.collect.Maps; |
| 21 | import com.google.protobuf.Message; |
| 22 | import p4.config.P4InfoOuterClass.Action; |
| 23 | import p4.config.P4InfoOuterClass.ActionProfile; |
| 24 | import p4.config.P4InfoOuterClass.ControllerPacketMetadata; |
| 25 | import p4.config.P4InfoOuterClass.Counter; |
| 26 | import p4.config.P4InfoOuterClass.DirectCounter; |
| 27 | import p4.config.P4InfoOuterClass.DirectMeter; |
| 28 | import p4.config.P4InfoOuterClass.MatchField; |
| 29 | import p4.config.P4InfoOuterClass.Meter; |
| 30 | import p4.config.P4InfoOuterClass.P4Info; |
| 31 | import p4.config.P4InfoOuterClass.Preamble; |
| 32 | import p4.config.P4InfoOuterClass.Table; |
| 33 | |
| 34 | import java.util.Map; |
| 35 | |
| 36 | import static java.lang.String.format; |
| 37 | |
| 38 | /** |
| 39 | * Utility class to easily retrieve information from a P4Info protobuf message. |
| 40 | */ |
| 41 | final class P4InfoBrowser { |
| 42 | |
| 43 | private final EntityBrowser<Table> tables = new EntityBrowser<>("table"); |
| 44 | private final EntityBrowser<Action> actions = new EntityBrowser<>("action"); |
| 45 | private final EntityBrowser<ActionProfile> actionProfiles = new EntityBrowser<>("action profile"); |
| 46 | private final EntityBrowser<Counter> counters = new EntityBrowser<>("counter"); |
| 47 | private final EntityBrowser<DirectCounter> directCounters = new EntityBrowser<>("direct counter"); |
| 48 | private final EntityBrowser<Meter> meters = new EntityBrowser<>("meter"); |
| 49 | private final EntityBrowser<DirectMeter> directMeters = new EntityBrowser<>("direct meter"); |
| 50 | private final EntityBrowser<ControllerPacketMetadata> ctrlPktMetadatas = |
| 51 | new EntityBrowser<>("controller packet metadata"); |
| 52 | private final Map<Integer, EntityBrowser<Action.Param>> actionParams = Maps.newHashMap(); |
| 53 | private final Map<Integer, EntityBrowser<MatchField>> matchFields = Maps.newHashMap(); |
| 54 | |
| 55 | /** |
| 56 | * Creates a new browser for the given P4Info. |
| 57 | * |
| 58 | * @param p4info P4Info protobuf message |
| 59 | */ |
| 60 | P4InfoBrowser(P4Info p4info) { |
| 61 | parseP4Info(p4info); |
| 62 | } |
| 63 | |
| 64 | private void parseP4Info(P4Info p4info) { |
| 65 | p4info.getTablesList().forEach( |
| 66 | entity -> { |
| 67 | tables.addWithPreamble(entity.getPreamble(), entity); |
| 68 | // Index match fields. |
| 69 | int tableId = entity.getPreamble().getId(); |
| 70 | String tableName = entity.getPreamble().getName(); |
| 71 | EntityBrowser<MatchField> matchFieldBrowser = new EntityBrowser<>(format( |
| 72 | "match field for table '%s'", tableName)); |
| 73 | entity.getMatchFieldsList().forEach(m -> matchFieldBrowser.add(m.getName(), m.getId(), m)); |
| 74 | matchFields.put(tableId, matchFieldBrowser); |
| 75 | }); |
| 76 | |
| 77 | p4info.getActionsList().forEach( |
| 78 | entity -> { |
| 79 | actions.addWithPreamble(entity.getPreamble(), entity); |
| 80 | // Index action params. |
| 81 | int actionId = entity.getPreamble().getId(); |
| 82 | String actionName = entity.getPreamble().getName(); |
| 83 | EntityBrowser<Action.Param> paramBrowser = new EntityBrowser<>(format( |
| 84 | "param for action '%s'", actionName)); |
| 85 | entity.getParamsList().forEach(p -> paramBrowser.add(p.getName(), p.getId(), p)); |
| 86 | actionParams.put(actionId, paramBrowser); |
| 87 | }); |
| 88 | |
| 89 | p4info.getActionProfilesList().forEach( |
| 90 | entity -> actionProfiles.addWithPreamble(entity.getPreamble(), entity)); |
| 91 | |
| 92 | p4info.getCountersList().forEach( |
| 93 | entity -> counters.addWithPreamble(entity.getPreamble(), entity)); |
| 94 | |
| 95 | p4info.getDirectCountersList().forEach( |
| 96 | entity -> directCounters.addWithPreamble(entity.getPreamble(), entity)); |
| 97 | |
| 98 | p4info.getMetersList().forEach( |
| 99 | entity -> meters.addWithPreamble(entity.getPreamble(), entity)); |
| 100 | |
| 101 | p4info.getDirectMetersList().forEach( |
| 102 | entity -> directMeters.addWithPreamble(entity.getPreamble(), entity)); |
| 103 | |
| 104 | p4info.getControllerPacketMetadataList().forEach( |
| 105 | entity -> ctrlPktMetadatas.addWithPreamble(entity.getPreamble(), entity)); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * Returns a browser for tables. |
| 110 | * |
| 111 | * @return table browser |
| 112 | */ |
| 113 | EntityBrowser<Table> tables() { |
| 114 | return tables; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Returns a browser for actions. |
| 119 | * |
| 120 | * @return action browser |
| 121 | */ |
| 122 | EntityBrowser<Action> actions() { |
| 123 | return actions; |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Returns a browser for action profiles. |
| 128 | * |
| 129 | * @return action profile browser |
| 130 | */ |
| 131 | EntityBrowser<ActionProfile> actionProfiles() { |
| 132 | return actionProfiles; |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * Returns a browser for counters. |
| 137 | * |
| 138 | * @return counter browser |
| 139 | */ |
| 140 | EntityBrowser<Counter> counters() { |
| 141 | return counters; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Returns a browser for direct counters. |
| 146 | * |
| 147 | * @return direct counter browser |
| 148 | */ |
| 149 | EntityBrowser<DirectCounter> directCounters() { |
| 150 | return directCounters; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * Returns a browser for meters. |
| 155 | * |
| 156 | * @return meter browser |
| 157 | */ |
| 158 | EntityBrowser<Meter> meters() { |
| 159 | return meters; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Returns a browser for direct meters. |
| 164 | * |
| 165 | * @return table browser |
| 166 | */ |
| 167 | EntityBrowser<DirectMeter> directMeters() { |
| 168 | return directMeters; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * Returns a browser for controller packet metadata. |
| 173 | * |
| 174 | * @return controller packet metadata browser |
| 175 | */ |
| 176 | EntityBrowser<ControllerPacketMetadata> controllerPacketMetadatas() { |
| 177 | return ctrlPktMetadatas; |
| 178 | } |
| 179 | |
| 180 | /** |
| 181 | * Returns a browser for params of the given action. |
| 182 | * |
| 183 | * @param actionId action identifier |
| 184 | * @return action params browser |
| 185 | * @throws NotFoundException if the action cannot be found |
| 186 | */ |
| 187 | EntityBrowser<Action.Param> actionParams(int actionId) throws NotFoundException { |
| 188 | // Throws exception if action id is not found. |
| 189 | actions.getById(actionId); |
| 190 | return actionParams.get(actionId); |
| 191 | } |
| 192 | |
| 193 | /** |
| 194 | * Returns a browser for match fields of the given table. |
| 195 | * |
| 196 | * @param tableId table identifier |
| 197 | * @return controller packet metadata browser |
| 198 | * @throws NotFoundException if the table cannot be found |
| 199 | */ |
| 200 | EntityBrowser<MatchField> matchFields(int tableId) throws NotFoundException { |
| 201 | // Throws exception if action id is not found. |
| 202 | tables.getById(tableId); |
| 203 | return matchFields.get(tableId); |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Browser of P4Info entities. |
| 208 | * |
| 209 | * @param <T> protobuf message type |
| 210 | */ |
| 211 | static final class EntityBrowser<T extends Message> { |
| 212 | |
| 213 | private String entityName; |
| 214 | private final Map<String, T> names = Maps.newHashMap(); |
| 215 | private final Map<String, T> aliases = Maps.newHashMap(); |
| 216 | private final Map<Integer, T> ids = Maps.newHashMap(); |
| 217 | |
| 218 | private EntityBrowser(String entityName) { |
| 219 | this.entityName = entityName; |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * Adds the given entity identified by the given name and id. |
| 224 | * |
| 225 | * @param name entity name |
| 226 | * @param id entity id |
| 227 | * @param entity entity message |
| 228 | */ |
| 229 | void add(String name, int id, T entity) { |
| 230 | names.put(name, entity); |
| 231 | ids.put(id, entity); |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Adds the given entity identified by the given P4Info preamble. |
| 236 | * |
| 237 | * @param preamble P4Info preamble protobuf message |
| 238 | * @param entity entity message |
| 239 | */ |
| 240 | void addWithPreamble(Preamble preamble, T entity) { |
| 241 | names.put(preamble.getName(), entity); |
| 242 | aliases.put(preamble.getName(), entity); |
| 243 | ids.put(preamble.getId(), entity); |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Returns true if the P4Info defines an entity with such name, false otherwise. |
| 248 | * |
| 249 | * @param name entity name |
| 250 | * @return boolean |
| 251 | */ |
| 252 | boolean hasName(String name) { |
| 253 | return names.containsKey(name); |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * Returns the entity identified by the given name, if present, otherwise, throws an exception. |
| 258 | * |
| 259 | * @param name entity name |
| 260 | * @return entity message |
| 261 | * @throws NotFoundException if the entity cannot be found |
| 262 | */ |
| 263 | T getByName(String name) throws NotFoundException { |
| 264 | if (!hasName(name)) { |
| 265 | throw new NotFoundException(entityName, name); |
| 266 | } |
| 267 | return names.get(name); |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Returns true if the P4Info defines an entity with such alias, false otherwise. |
| 272 | * |
| 273 | * @param alias entity alias |
| 274 | * @return boolean |
| 275 | */ |
| 276 | boolean hasAlias(String alias) { |
| 277 | return aliases.containsKey(alias); |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * Returns the entity identified by the given alias, if present, otherwise, throws an exception. |
| 282 | * |
| 283 | * @param alias entity alias |
| 284 | * @return entity message |
| 285 | * @throws NotFoundException if the entity cannot be found |
| 286 | */ |
| 287 | T getByAlias(String alias) throws NotFoundException { |
| 288 | if (!hasName(alias)) { |
| 289 | throw new NotFoundException(entityName, alias); |
| 290 | } |
| 291 | return aliases.get(alias); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Returns true if the P4Info defines an entity with such id, false otherwise. |
| 296 | * |
| 297 | * @param id entity id |
| 298 | * @return boolean |
| 299 | */ |
| 300 | boolean hasId(int id) { |
| 301 | return ids.containsKey(id); |
| 302 | } |
| 303 | |
| 304 | /** |
| 305 | * Returns the entity identified by the given id, if present, otherwise, throws an exception. |
| 306 | * |
| 307 | * @param id entity id |
| 308 | * @return entity message |
| 309 | * @throws NotFoundException if the entity cannot be found |
| 310 | */ |
| 311 | T getById(int id) throws NotFoundException { |
| 312 | if (!hasId(id)) { |
| 313 | throw new NotFoundException(entityName, id); |
| 314 | } |
| 315 | return ids.get(id); |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * Signals tha an entity cannot be found in the P4Info. |
| 321 | */ |
| 322 | public static class NotFoundException extends Exception { |
| 323 | |
| 324 | NotFoundException(String entityName, String key) { |
| 325 | super(format("No such %s in P4Info with name/alias '%s'", entityName, key)); |
| 326 | } |
| 327 | |
| 328 | NotFoundException(String entityName, int id) { |
| 329 | super(format("No such %s in P4Info with id '%d'", entityName, id)); |
| 330 | } |
| 331 | } |
| 332 | } |