/**
 * 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.
 */

/**
 * These .proto interfaces are private and stable.
 * Please see http://wiki.apache.org/hadoop/Compatibility
 * for what changes are allowed for a *stable* .proto interface.
 */

option java_package = "org.apache.hadoop.hdfs.protocol.proto";
option java_outer_classname = "ClientNamenodeProtocolProtos";
option java_generic_services = true;
option java_generate_equals_and_hash = true;
package hadoop.hdfs;

import "Security.proto";
import "hdfs.proto";

/**
 * The ClientNamenodeProtocol Service defines the interface between a client 
 * (as runnign inside a MR Task) and the Namenode.
 * See org.apache.hadoop.hdfs.protocol.ClientProtocol for the javadoc 
 * for each of the methods.
 * The exceptions declared in the above class also apply to this protocol.
 * Exceptions are unwrapped and thrown by the  PB libraries.
 */

message GetBlockLocationsRequestProto {
  required string src = 1;     // file name
  required uint64 offset = 2;  // range start offset
  required uint64 length = 3;  // range length
}

message GetBlockLocationsResponseProto {
  optional LocatedBlocksProto locations = 1;
}

message GetServerDefaultsRequestProto { // No parameters
}

message GetServerDefaultsResponseProto {
  required FsServerDefaultsProto serverDefaults = 1;
}

enum CreateFlagProto {
  CREATE = 0x01;    // Create a file
  OVERWRITE = 0x02; // Truncate/overwrite a file. Same as POSIX O_TRUNC
  APPEND = 0x04;    // Append to a file
}

message CreateRequestProto {
  required string src = 1;
  required FsPermissionProto masked = 2;
  required string clientName = 3;
  required uint32 createFlag = 4;  // bits set using CreateFlag
  required bool createParent = 5;
  required uint32 replication = 6; // Short: Only 16 bits used
  required uint64 blockSize = 7;
}

message CreateResponseProto {
  optional HdfsFileStatusProto fs = 1;
}

message AppendRequestProto {
  required string src = 1;
  required string clientName = 2;
}

message AppendResponseProto {
  optional LocatedBlockProto block = 1;
}

message SetReplicationRequestProto {
  required string src = 1;
  required uint32 replication = 2; // Short: Only 16 bits used
}

message SetReplicationResponseProto {
  required bool result = 1;
}

message SetPermissionRequestProto {
  required string src = 1;
  required FsPermissionProto permission = 2;
}

message SetPermissionResponseProto { // void response
}

message SetOwnerRequestProto {
  required string src = 1;
  optional string username = 2;
  optional string groupname = 3;
}

message SetOwnerResponseProto { // void response
}

message AbandonBlockRequestProto {
  required ExtendedBlockProto b = 1;
  required string src = 2;
  required string holder = 3;
}

message AbandonBlockResponseProto { // void response
}

message AddBlockRequestProto {
  required string src = 1;
  required string clientName = 2;
  optional ExtendedBlockProto previous = 3;
  repeated DatanodeInfoProto excludeNodes = 4;
  optional uint64 fileId = 5 [default = 0];  // default as a bogus id
  repeated string favoredNodes = 6; //the set of datanodes to use for the block
}

message AddBlockResponseProto {
  required LocatedBlockProto block = 1;
}

message GetAdditionalDatanodeRequestProto {
  required string src = 1;
  required ExtendedBlockProto blk = 2;
  repeated DatanodeInfoProto existings = 3;
  repeated DatanodeInfoProto excludes = 4;
  required uint32 numAdditionalNodes = 5;
  required string clientName = 6;
}

message GetAdditionalDatanodeResponseProto {
  required LocatedBlockProto block = 1;
}

message CompleteRequestProto {
  required string src = 1;
  required string clientName = 2;
  optional ExtendedBlockProto last = 3;
  optional uint64 fileId = 4 [default = 0];  // default to GRANDFATHER_INODE_ID
}

message CompleteResponseProto {
  required bool result = 1;
}

message ReportBadBlocksRequestProto {
  repeated LocatedBlockProto blocks = 1;
}

message ReportBadBlocksResponseProto { // void response
}

message ConcatRequestProto {
  required string trg = 1;
  repeated string srcs = 2;
}

message ConcatResponseProto { // void response
}

message RenameRequestProto {
  required string src = 1;
  required string dst = 2;
}

message RenameResponseProto {
  required bool result = 1;
}


message Rename2RequestProto {
  required string src = 1;
  required string dst = 2;
  required bool overwriteDest = 3;
}

message Rename2ResponseProto { // void response
}

message DeleteRequestProto {
  required string src = 1;
  required bool recursive = 2;
}

message DeleteResponseProto {
    required bool result = 1;
}

message MkdirsRequestProto {
  required string src = 1;
  required FsPermissionProto masked = 2;
  required bool createParent = 3;
}
message MkdirsResponseProto {
    required bool result = 1;
}

message GetListingRequestProto {
  required string src = 1;
  required bytes startAfter = 2;
  required bool needLocation = 3;
}
message GetListingResponseProto {
  optional DirectoryListingProto dirList = 1;
}

message GetSnapshottableDirListingRequestProto { // no input parameters
}
message GetSnapshottableDirListingResponseProto {
  optional SnapshottableDirectoryListingProto snapshottableDirList = 1;
}

message GetSnapshotDiffReportRequestProto {
  required string snapshotRoot = 1;
  required string fromSnapshot = 2;
  required string toSnapshot = 3;
}
message GetSnapshotDiffReportResponseProto {
  required SnapshotDiffReportProto diffReport = 1;
}

message RenewLeaseRequestProto {
  required string clientName = 1;
}

message RenewLeaseResponseProto { //void response
}

message RecoverLeaseRequestProto {
  required string src = 1;
  required string clientName = 2;
}
message RecoverLeaseResponseProto {
  required bool result = 1;
}

message GetFsStatusRequestProto { // no input paramters
}

message GetFsStatsResponseProto {
  required uint64 capacity = 1;
  required uint64 used = 2;
  required uint64 remaining = 3;
  required uint64 under_replicated = 4;
  required uint64 corrupt_blocks = 5;
  required uint64 missing_blocks = 6;
}

enum DatanodeReportTypeProto {  // type of the datanode report
  ALL = 1;
  LIVE = 2;
  DEAD = 3;
}

message GetDatanodeReportRequestProto {
  required DatanodeReportTypeProto type = 1;
}

message GetDatanodeReportResponseProto {
  repeated DatanodeInfoProto di = 1;
}

message GetPreferredBlockSizeRequestProto {
  required string filename = 1;
}

message GetPreferredBlockSizeResponseProto {
  required uint64 bsize = 1;
}

enum SafeModeActionProto {
  SAFEMODE_LEAVE = 1;
  SAFEMODE_ENTER = 2;
  SAFEMODE_GET = 3;
}

message SetSafeModeRequestProto {
  required SafeModeActionProto action = 1;
  optional bool checked = 2 [default = false];
}

message SetSafeModeResponseProto {
  required bool result = 1;
}

message SaveNamespaceRequestProto { // no parameters
}

message SaveNamespaceResponseProto { // void response
}

message RollEditsRequestProto { // no parameters
}

message RollEditsResponseProto { // response
  required uint64 newSegmentTxId = 1;
}

message RestoreFailedStorageRequestProto {
  required string arg = 1;
}

message RestoreFailedStorageResponseProto {
    required bool result = 1;
}

message RefreshNodesRequestProto { // no parameters
}

message RefreshNodesResponseProto { // void response
}

message FinalizeUpgradeRequestProto { // no parameters
}

message FinalizeUpgradeResponseProto { // void response
}

message ListCorruptFileBlocksRequestProto {
  required string path = 1;
  optional string cookie = 2;
}

message ListCorruptFileBlocksResponseProto {
  required CorruptFileBlocksProto corrupt = 1;
}

message MetaSaveRequestProto {
  required string filename = 1;
}

message MetaSaveResponseProto { // void response
}

message GetFileInfoRequestProto {
  required string src = 1;
}

message GetFileInfoResponseProto {
  optional HdfsFileStatusProto fs = 1;
}

message IsFileClosedRequestProto {
  required string src = 1;
}

message IsFileClosedResponseProto {
  required bool result = 1;
}

message GetFileLinkInfoRequestProto {
  required string src = 1;
}

message GetFileLinkInfoResponseProto {
  optional HdfsFileStatusProto fs = 1;
}

message GetContentSummaryRequestProto {
  required string path = 1;
}

message GetContentSummaryResponseProto {
  required ContentSummaryProto summary = 1;
}

message SetQuotaRequestProto {
  required string path = 1;
  required uint64 namespaceQuota = 2;
  required uint64 diskspaceQuota = 3;
}

message SetQuotaResponseProto { // void response
}

message FsyncRequestProto {
  required string src = 1;
  required string client = 2;
  optional sint64 lastBlockLength = 3 [default = -1];
}

message FsyncResponseProto { // void response
}

message SetTimesRequestProto {
  required string src = 1;
  required uint64 mtime = 2;
  required uint64 atime = 3;
}

message SetTimesResponseProto { // void response
}

message CreateSymlinkRequestProto {
  required string target = 1;
  required string link = 2;
  required FsPermissionProto dirPerm = 3;
  required bool createParent = 4;
}

message CreateSymlinkResponseProto { // void response
}

message GetLinkTargetRequestProto {
  required string path = 1;
}
message GetLinkTargetResponseProto {
  optional string targetPath = 1;
}

message UpdateBlockForPipelineRequestProto {
  required ExtendedBlockProto block = 1;
  required string clientName = 2;
}

message UpdateBlockForPipelineResponseProto {
  required LocatedBlockProto block = 1;
}

message UpdatePipelineRequestProto {
  required string clientName = 1;
  required ExtendedBlockProto oldBlock = 2;
  required ExtendedBlockProto newBlock = 3;
  repeated DatanodeIDProto newNodes = 4;
}

message UpdatePipelineResponseProto { // void response
}

message SetBalancerBandwidthRequestProto {
  required int64 bandwidth = 1;
}

message SetBalancerBandwidthResponseProto { // void response
}

message GetDataEncryptionKeyRequestProto { // no parameters
}

message GetDataEncryptionKeyResponseProto {
  optional DataEncryptionKeyProto dataEncryptionKey = 1;
}

message CreateSnapshotRequestProto {
  required string snapshotRoot = 1;
  optional string snapshotName = 2;
}

message CreateSnapshotResponseProto {
  required string snapshotPath = 1;
}

message RenameSnapshotRequestProto {
  required string snapshotRoot = 1;
  required string snapshotOldName = 2;
  required string snapshotNewName = 3;
}

message RenameSnapshotResponseProto { // void response
}

message AllowSnapshotRequestProto {
  required string snapshotRoot = 1;
}

message AllowSnapshotResponseProto {
}

message DisallowSnapshotRequestProto {
  required string snapshotRoot = 1;
}

message DisallowSnapshotResponseProto {
}

message DeleteSnapshotRequestProto {
  required string snapshotRoot = 1;
  required string snapshotName = 2;
}

message DeleteSnapshotResponseProto { // void response
}

service ClientNamenodeProtocol {
  rpc getBlockLocations(GetBlockLocationsRequestProto)
      returns(GetBlockLocationsResponseProto);
  rpc getServerDefaults(GetServerDefaultsRequestProto)
      returns(GetServerDefaultsResponseProto);
  rpc create(CreateRequestProto)returns(CreateResponseProto);
  rpc append(AppendRequestProto) returns(AppendResponseProto);
  rpc setReplication(SetReplicationRequestProto)
      returns(SetReplicationResponseProto);
  rpc setPermission(SetPermissionRequestProto)
      returns(SetPermissionResponseProto);
  rpc setOwner(SetOwnerRequestProto) returns(SetOwnerResponseProto);
  rpc abandonBlock(AbandonBlockRequestProto) returns(AbandonBlockResponseProto);
  rpc addBlock(AddBlockRequestProto) returns(AddBlockResponseProto);
  rpc getAdditionalDatanode(GetAdditionalDatanodeRequestProto)
      returns(GetAdditionalDatanodeResponseProto);
  rpc complete(CompleteRequestProto) returns(CompleteResponseProto);
  rpc reportBadBlocks(ReportBadBlocksRequestProto)
      returns(ReportBadBlocksResponseProto);
  rpc concat(ConcatRequestProto) returns(ConcatResponseProto);
  rpc rename(RenameRequestProto) returns(RenameResponseProto);
  rpc rename2(Rename2RequestProto) returns(Rename2ResponseProto);
  rpc delete(DeleteRequestProto) returns(DeleteResponseProto);
  rpc mkdirs(MkdirsRequestProto) returns(MkdirsResponseProto);
  rpc getListing(GetListingRequestProto) returns(GetListingResponseProto);
  rpc renewLease(RenewLeaseRequestProto) returns(RenewLeaseResponseProto);
  rpc recoverLease(RecoverLeaseRequestProto)
      returns(RecoverLeaseResponseProto);
  rpc getFsStats(GetFsStatusRequestProto) returns(GetFsStatsResponseProto);
  rpc getDatanodeReport(GetDatanodeReportRequestProto)
      returns(GetDatanodeReportResponseProto);
  rpc getPreferredBlockSize(GetPreferredBlockSizeRequestProto)
      returns(GetPreferredBlockSizeResponseProto);
  rpc setSafeMode(SetSafeModeRequestProto)
      returns(SetSafeModeResponseProto);
  rpc saveNamespace(SaveNamespaceRequestProto)
      returns(SaveNamespaceResponseProto);
  rpc rollEdits(RollEditsRequestProto)
      returns(RollEditsResponseProto);
  rpc restoreFailedStorage(RestoreFailedStorageRequestProto)
      returns(RestoreFailedStorageResponseProto);
  rpc refreshNodes(RefreshNodesRequestProto) returns(RefreshNodesResponseProto);
  rpc finalizeUpgrade(FinalizeUpgradeRequestProto)
      returns(FinalizeUpgradeResponseProto);
  rpc listCorruptFileBlocks(ListCorruptFileBlocksRequestProto)
      returns(ListCorruptFileBlocksResponseProto);
  rpc metaSave(MetaSaveRequestProto) returns(MetaSaveResponseProto);
  rpc getFileInfo(GetFileInfoRequestProto) returns(GetFileInfoResponseProto);
  rpc getFileLinkInfo(GetFileLinkInfoRequestProto)
      returns(GetFileLinkInfoResponseProto);
  rpc getContentSummary(GetContentSummaryRequestProto)
      returns(GetContentSummaryResponseProto);
  rpc setQuota(SetQuotaRequestProto) returns(SetQuotaResponseProto);
  rpc fsync(FsyncRequestProto) returns(FsyncResponseProto);
  rpc setTimes(SetTimesRequestProto) returns(SetTimesResponseProto);
  rpc createSymlink(CreateSymlinkRequestProto)
      returns(CreateSymlinkResponseProto);
  rpc getLinkTarget(GetLinkTargetRequestProto)
      returns(GetLinkTargetResponseProto);
  rpc updateBlockForPipeline(UpdateBlockForPipelineRequestProto)
      returns(UpdateBlockForPipelineResponseProto);
  rpc updatePipeline(UpdatePipelineRequestProto)
      returns(UpdatePipelineResponseProto);
  rpc getDelegationToken(hadoop.common.GetDelegationTokenRequestProto)
      returns(hadoop.common.GetDelegationTokenResponseProto);
  rpc renewDelegationToken(hadoop.common.RenewDelegationTokenRequestProto)
      returns(hadoop.common.RenewDelegationTokenResponseProto);
  rpc cancelDelegationToken(hadoop.common.CancelDelegationTokenRequestProto)
      returns(hadoop.common.CancelDelegationTokenResponseProto);
  rpc setBalancerBandwidth(SetBalancerBandwidthRequestProto)
      returns(SetBalancerBandwidthResponseProto);
  rpc getDataEncryptionKey(GetDataEncryptionKeyRequestProto)
      returns(GetDataEncryptionKeyResponseProto);
  rpc createSnapshot(CreateSnapshotRequestProto)
      returns(CreateSnapshotResponseProto);
  rpc renameSnapshot(RenameSnapshotRequestProto)
      returns(RenameSnapshotResponseProto);
  rpc allowSnapshot(AllowSnapshotRequestProto)
      returns(AllowSnapshotResponseProto);
  rpc disallowSnapshot(DisallowSnapshotRequestProto)
      returns(DisallowSnapshotResponseProto);   
  rpc getSnapshottableDirListing(GetSnapshottableDirListingRequestProto)
      returns(GetSnapshottableDirListingResponseProto);
  rpc deleteSnapshot(DeleteSnapshotRequestProto)
      returns(DeleteSnapshotResponseProto);
  rpc getSnapshotDiffReport(GetSnapshotDiffReportRequestProto)
      returns(GetSnapshotDiffReportResponseProto);
  rpc isFileClosed(IsFileClosedRequestProto)
      returns(IsFileClosedResponseProto);
}