hadoop/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/hdfs.proto

/**
 * 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.
 */

// This file contains protocol buffers that are used throughout HDFS -- i.e.
// by the client, server, and data transfer protocols.

option java_package = "org.apache.hadoop.hdfs.protocol.proto";
option java_outer_classname = "HdfsProtos";
option java_generate_equals_and_hash = true;

message ExtendedBlockProto {
  required string poolId = 1;
  required uint64 blockId = 2;
  required uint64 numBytes = 3;
  required uint64 generationStamp = 4;
}

message BlockTokenIdentifierProto {
  required bytes identifier = 1;
  required bytes password = 2;
  required string kind = 3;
  required string service = 4;
}

message DatanodeIDProto {
  required string name = 1;
  required string storageID = 2;
  required uint32 infoPort = 3;
}

message DatanodeInfoProto {
  required DatanodeIDProto id = 1;
  optional uint64 capacity = 2;
  optional uint64 dfsUsed = 3;
  optional uint64 remaining = 4;
  optional uint64 blockPoolUsed = 5;
  optional uint64 lastUpdate = 6;
  optional uint32 xceiverCount = 7;
  optional string location = 8;
  optional string hostName = 9;
  enum AdminState {
    NORMAL = 0;
    DECOMMISSION_INPROGRESS = 1;
    DECOMMISSIONED = 2;
  }

  optional AdminState adminState = 10;
}