content: // Licensed to the Apache Software Foundation (ASF) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The ASF licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  package com.cloud.hypervisor.kvm.storage;
  
  import java.net.InetAddress;
  import java.net.UnknownHostException;
  
  import org.apache.logging.log4j.Logger;
  import org.apache.logging.log4j.LogManager;
  
  import com.cloud.storage.Storage;
  import com.cloud.utils.exception.CloudRuntimeException;
  
  public class FiberChannelAdapter extends MultipathSCSIAdapterBase {
  
      private Logger LOGGER = LogManager.getLogger(getClass());
  
      private String hostname = null;
      private String hostnameFq = null;
  
      public FiberChannelAdapter() {
          LOGGER.info("Loaded FiberChannelAdapter for StorageLayer");
          // get the hostname - we need this to compare to connid values
          try {
              InetAddress inetAddress = InetAddress.getLocalHost();
              hostname = inetAddress.getHostName(); // basic hostname
              if (hostname.indexOf(".") > 0) {
                  hostname = hostname.substring(0, hostname.indexOf(".")); // strip off domain
              }
              hostnameFq = inetAddress.getCanonicalHostName(); // fully qualified hostname
              LOGGER.info("Loaded FiberChannelAdapter for StorageLayer on host [" + hostname + "]");
          } catch (UnknownHostException e) {
              LOGGER.error("Error getting hostname", e);
          }
      }
  
      @Override
      public Storage.StoragePoolType getStoragePoolType() {
          return Storage.StoragePoolType.FiberChannel;
      }
  
      @Override
      public KVMStoragePool getStoragePool(String uuid) {
          KVMStoragePool pool = MapStorageUuidToStoragePool.get(uuid);
          if (pool == null) {
              // return a dummy pool - this adapter doesn't care about connectivity information
              pool = new MultipathSCSIPool(uuid, this);
              MapStorageUuidToStoragePool.put(uuid, pool);
           }
          LOGGER.info("FiberChannelAdapter return storage pool [" + uuid + "]");
          return pool;
      }
  
      public String getName() {
          return "FiberChannelAdapter";
      }
  
      public boolean isStoragePoolTypeSupported(Storage.StoragePoolType type) {
          if (Storage.StoragePoolType.FiberChannel.equals(type)) {
              return true;
          }
          return false;
      }
  
      @Override
      public AddressInfo parseAndValidatePath(String inPath) {
              // type=FIBERWWN; address=<address>; connid=<connid>
              String type = null;
              String address = null;
              String connectionId = null;
              String path = null;
              String[] parts = inPath.split(";");
              // handle initial code of wwn only
              if (parts.length == 1) {
                  type = "FIBERWWN";
                  address = parts[0];
              } else {
                  for (String part: parts) {
                      String[] pair = part.split("=");
                      if (pair.length == 2) {
                          String key = pair[0].trim();
                          String value = pair[1].trim();
                          if (key.equals("type")) {
                              type = value.toUpperCase();
                          } else if (key.equals("address")) {
                              address = value;
                          } else if (key.equals("connid")) {
                              connectionId = value;
                          } else if (key.startsWith("connid.")) {
                              String inHostname = key.substring(7);
                              if (inHostname != null && (inHostname.equals(this.hostname) || inHostname.equals(this.hostnameFq))) {
                                  connectionId = value;
                              }
                          }
                      }
                  }
              }
  
              if ("FIBERWWN".equals(type)) {
                  path = "/dev/mapper/3" + address;
              } else {
                  throw new CloudRuntimeException("Invalid address type provided for target disk: " + type);
              }
  
              return new AddressInfo(type, address, connectionId, path);
      }
  }
  