hadoop/hadoop-hdfs-project/hadoop-hdfs-client/src/main/proto/ClientNamenodeProtocol.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.
 */

/**
 * These .proto interfaces are private and stable.
 * Please see https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/Compatibility.html
 * for what changes are allowed for a *stable* .proto interface.
 */
syntax="proto2";
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";
import "acl.proto";
import "xattr.proto";
import "encryption.proto";
import "inotify.proto";
import "erasurecoding.proto";
import "HAServiceProtocol.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
  LAZY_PERSIST = 0x10; // File with reduced durability guarantees.
  NEW_BLOCK = 0x20; // Write data to a new block when appending
  SHOULD_REPLICATE = 0x80; // Enforce to create a replicate 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;
  repeated CryptoProtocolVersionProto cryptoProtocolVersion = 8;
  optional FsPermissionProto unmasked = 9;
  optional string ecPolicyName = 10;
  optional string storagePolicy = 11;
}

message CreateResponseProto {
  optional HdfsFileStatusProto fs = 1;
}

message AppendRequestProto {
  required string src = 1;
  required string clientName = 2;
  optional uint32 flag = 3; // bits set using CreateFlag
}

message AppendResponseProto {
  optional LocatedBlockProto block = 1;
  optional HdfsFileStatusProto stat = 2;
}

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

message SetReplicationResponseProto {
  required bool result = 1;
}

message SetStoragePolicyRequestProto {
  required string src = 1;
  required string policyName = 2;
}

message SetStoragePolicyResponseProto { // void response
}

message UnsetStoragePolicyRequestProto {
  required string src = 1;
}

message UnsetStoragePolicyResponseProto {
}

message GetStoragePolicyRequestProto {
  required string path = 1;
}

message GetStoragePolicyResponseProto {
  required BlockStoragePolicyProto storagePolicy = 1;
}

message GetStoragePoliciesRequestProto { // void request
}

message GetStoragePoliciesResponseProto {
  repeated BlockStoragePolicyProto policies = 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;
  optional uint64 fileId = 4 [default = 0];  // default to GRANDFATHER_INODE_ID
}

message AbandonBlockResponseProto { // void response
}

enum AddBlockFlagProto {
  NO_LOCAL_WRITE = 1; // avoid writing to local node.
  IGNORE_CLIENT_LOCALITY = 2; // write to a random node
}

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
  repeated AddBlockFlagProto flags = 7; // default to empty.
}

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;
  repeated string existingStorageUuids = 7;
  optional uint64 fileId = 8 [default = 0];  // default to GRANDFATHER_INODE_ID
}

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 TruncateRequestProto {
  required string src = 1;
  required uint64 newLength = 2;
  required string clientName = 3;
}

message TruncateResponseProto {
  required bool result = 1;
}

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;
  optional bool moveToTrash = 4;
}

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;
  optional FsPermissionProto unmasked = 4;
}
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 GetBatchedListingRequestProto {
  repeated string paths = 1;
  required bytes startAfter = 2;
  required bool needLocation = 3;
}

message GetBatchedListingResponseProto {
  repeated BatchedDirectoryListingProto listings = 1;
  required bool hasMore = 2;
  required bytes startAfter = 3;
}

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

message GetSnapshotListingRequestProto {
  required string snapshotRoot = 1;
}

message GetSnapshotListingResponseProto {
  optional SnapshotListingProto snapshotList = 1;
}

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

message GetSnapshotDiffReportListingRequestProto {
  required string snapshotRoot = 1;
  required string fromSnapshot = 2;
  required string toSnapshot = 3;
  optional SnapshotDiffReportCursorProto cursor = 4;
}

message GetSnapshotDiffReportListingResponseProto {
  required SnapshotDiffReportListingProto 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;
  optional uint64 missing_repl_one_blocks = 7;
  optional uint64 blocks_in_future = 8;
  optional uint64 pending_deletion_blocks = 9;
}

message GetFsReplicatedBlockStatsRequestProto { // no input paramters
}

message GetFsReplicatedBlockStatsResponseProto {
  required uint64 low_redundancy = 1;
  required uint64 corrupt_blocks = 2;
  required uint64 missing_blocks = 3;
  required uint64 missing_repl_one_blocks = 4;
  required uint64 blocks_in_future = 5;
  required uint64 pending_deletion_blocks = 6;
  optional uint64 highest_prio_low_redundancy_blocks = 7;

}

message GetFsECBlockGroupStatsRequestProto { // no input paramters
}

message GetFsECBlockGroupStatsResponseProto {
  required uint64 low_redundancy = 1;
  required uint64 corrupt_blocks = 2;
  required uint64 missing_blocks = 3;
  required uint64 blocks_in_future = 4;
  required uint64 pending_deletion_blocks = 5;
  optional uint64 highest_prio_low_redundancy_blocks = 6;
}

enum DatanodeReportTypeProto {  // type of the datanode report
  ALL = 1;
  LIVE = 2;
  DEAD = 3;
  DECOMMISSIONING = 4;
  ENTERING_MAINTENANCE = 5;
  IN_MAINTENANCE = 6;
}

message GetDatanodeReportRequestProto {
  required DatanodeReportTypeProto type = 1;
}

message GetDatanodeReportResponseProto {
  repeated DatanodeInfoProto di = 1;
}

message GetDatanodeStorageReportRequestProto {
  required DatanodeReportTypeProto type = 1;
}

message DatanodeStorageReportProto {
  required DatanodeInfoProto datanodeInfo = 1;
  repeated StorageReportProto storageReports = 2;
}

message GetDatanodeStorageReportResponseProto {
  repeated DatanodeStorageReportProto datanodeStorageReports = 1;
}

message GetPreferredBlockSizeRequestProto {
  required string filename = 1;
}

message GetPreferredBlockSizeResponseProto {
  required uint64 bsize = 1;
}

message GetSlowDatanodeReportRequestProto {
}

message GetSlowDatanodeReportResponseProto {
  repeated DatanodeInfoProto datanodeInfoProto = 1;
}

enum SafeModeActionProto {
  SAFEMODE_LEAVE = 1;
  SAFEMODE_ENTER = 2;
  SAFEMODE_GET = 3;
  SAFEMODE_FORCE_EXIT = 4;
}

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

message SetSafeModeResponseProto {
  required bool result = 1;
}

message SaveNamespaceRequestProto {
  optional uint64 timeWindow = 1 [default = 0];
  optional uint64 txGap = 2 [default = 0];
}

message SaveNamespaceResponseProto { // void response
  optional bool saved = 1 [default = true];
}

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 UpgradeStatusRequestProto { // no parameters
}

message UpgradeStatusResponseProto {
 required bool upgradeFinalized = 1;
}

enum RollingUpgradeActionProto {
  QUERY = 1;
  START = 2;
  FINALIZE = 3;
}

message RollingUpgradeRequestProto {
  required RollingUpgradeActionProto action = 1;
}

message RollingUpgradeInfoProto {
  required RollingUpgradeStatusProto status = 1;
  required uint64 startTime = 2;
  required uint64 finalizeTime = 3;
  required bool createdRollbackImages = 4;
}

message RollingUpgradeResponseProto {
  optional RollingUpgradeInfoProto rollingUpgradeInfo= 1;
}
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 GetLocatedFileInfoRequestProto {
  optional string src = 1;
  optional bool needBlockToken = 2 [default = false];
}

message GetLocatedFileInfoResponseProto {
  optional HdfsFileStatusProto fs = 1;
}

message IsFileClosedRequestProto {
  required string src = 1;
}

message IsFileClosedResponseProto {
  required bool result = 1;
}

message CacheDirectiveInfoProto {
  optional int64 id = 1;
  optional string path = 2;
  optional uint32 replication = 3;
  optional string pool = 4;
  optional CacheDirectiveInfoExpirationProto expiration = 5;
}

message CacheDirectiveInfoExpirationProto {
  required int64 millis = 1;
  required bool isRelative = 2;
}

message CacheDirectiveStatsProto {
  required int64 bytesNeeded = 1;
  required int64 bytesCached = 2;
  required int64 filesNeeded = 3;
  required int64 filesCached = 4;
  required bool hasExpired = 5;
}

enum CacheFlagProto {
  FORCE = 0x01;    // Ignore pool resource limits
}

message AddCacheDirectiveRequestProto {
  required CacheDirectiveInfoProto info = 1;
  optional uint32 cacheFlags = 2;  // bits set using CacheFlag
}

message AddCacheDirectiveResponseProto {
  required int64 id = 1;
}

message ModifyCacheDirectiveRequestProto {
  required CacheDirectiveInfoProto info = 1;
  optional uint32 cacheFlags = 2;  // bits set using CacheFlag
}

message ModifyCacheDirectiveResponseProto {
}

message RemoveCacheDirectiveRequestProto {
  required int64 id = 1;
}

message RemoveCacheDirectiveResponseProto {
}

message ListCacheDirectivesRequestProto {
  required int64 prevId = 1;
  required CacheDirectiveInfoProto filter = 2;
}

message CacheDirectiveEntryProto {
  required CacheDirectiveInfoProto info = 1;
  required CacheDirectiveStatsProto stats = 2;
}

message ListCacheDirectivesResponseProto {
  repeated CacheDirectiveEntryProto elements = 1;
  required bool hasMore = 2;
}

message CachePoolInfoProto {
  optional string poolName = 1;
  optional string ownerName = 2;
  optional string groupName = 3;
  optional int32 mode = 4;
  optional int64 limit = 5;
  optional int64 maxRelativeExpiry = 6;
  optional uint32 defaultReplication = 7 [default=1];
}

message CachePoolStatsProto {
  required int64 bytesNeeded = 1;
  required int64 bytesCached = 2;
  required int64 bytesOverlimit = 3;
  required int64 filesNeeded = 4;
  required int64 filesCached = 5;
}

message AddCachePoolRequestProto {
  required CachePoolInfoProto info = 1;
}

message AddCachePoolResponseProto { // void response
}

message ModifyCachePoolRequestProto {
  required CachePoolInfoProto info = 1;
}

message ModifyCachePoolResponseProto { // void response
}

message RemoveCachePoolRequestProto {
  required string poolName = 1;
}

message RemoveCachePoolResponseProto { // void response
}

message ListCachePoolsRequestProto {
  required string prevPoolName = 1;
}

message ListCachePoolsResponseProto {
  repeated CachePoolEntryProto entries = 1;
  required bool hasMore = 2;
}

message CachePoolEntryProto {
  required CachePoolInfoProto info = 1;
  required CachePoolStatsProto stats = 2;
}

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 GetQuotaUsageRequestProto {
  required string path = 1;
}

message GetQuotaUsageResponseProto {
  required QuotaUsageProto usage = 1;
}

message SetQuotaRequestProto {
  required string path = 1;
  required uint64 namespaceQuota = 2;
  required uint64 storagespaceQuota = 3;
  optional StorageTypeProto storageType = 4;
}

message SetQuotaResponseProto { // void response
}

message FsyncRequestProto {
  required string src = 1;
  required string client = 2;
  optional sint64 lastBlockLength = 3 [default = -1];
  optional uint64 fileId = 4 [default = 0];  // default to GRANDFATHER_INODE_ID
}

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;
  repeated string storageIDs = 5;
}

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
}

message CheckAccessRequestProto {
  required string path = 1;
  required AclEntryProto.FsActionProto mode = 2;
}

message CheckAccessResponseProto { // void response
}

message GetCurrentEditLogTxidRequestProto {
}

message GetCurrentEditLogTxidResponseProto {
  required int64 txid = 1;
}

message GetEditsFromTxidRequestProto {
  required int64 txid = 1;
}

message GetEditsFromTxidResponseProto {
  required EventsListProto eventsList = 1;
}

enum OpenFilesTypeProto {
  ALL_OPEN_FILES = 1;
  BLOCKING_DECOMMISSION = 2;
}

message ListOpenFilesRequestProto {
  required int64 id = 1;
  repeated OpenFilesTypeProto types = 2;
  optional string path = 3;
}

message OpenFilesBatchResponseProto {
  required int64 id = 1;
  required string path = 2;
  required string clientName = 3;
  required string clientMachine = 4;
}

message ListOpenFilesResponseProto {
  repeated OpenFilesBatchResponseProto entries = 1;
  required bool hasMore = 2;
  repeated OpenFilesTypeProto types = 3;
}

message MsyncRequestProto {
}

message MsyncResponseProto {
}

message SatisfyStoragePolicyRequestProto {
  required string src = 1;
}

message SatisfyStoragePolicyResponseProto {

}

message HAServiceStateRequestProto {
}

message HAServiceStateResponseProto {
  required hadoop.common.HAServiceStateProto state = 1;
}

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 setStoragePolicy(SetStoragePolicyRequestProto)
      returns(SetStoragePolicyResponseProto);
  rpc unsetStoragePolicy(UnsetStoragePolicyRequestProto)
      returns(UnsetStoragePolicyResponseProto);
  rpc getStoragePolicy(GetStoragePolicyRequestProto)
      returns(GetStoragePolicyResponseProto);
  rpc getStoragePolicies(GetStoragePoliciesRequestProto)
      returns(GetStoragePoliciesResponseProto);
  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 truncate(TruncateRequestProto) returns(TruncateResponseProto);
  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 getBatchedListing (GetBatchedListingRequestProto) returns (GetBatchedListingResponseProto);
  rpc renewLease(RenewLeaseRequestProto) returns(RenewLeaseResponseProto);
  rpc recoverLease(RecoverLeaseRequestProto)
      returns(RecoverLeaseResponseProto);
  rpc getFsStats(GetFsStatusRequestProto) returns(GetFsStatsResponseProto);
  rpc getFsReplicatedBlockStats(GetFsReplicatedBlockStatsRequestProto)
      returns (GetFsReplicatedBlockStatsResponseProto);
  rpc getFsECBlockGroupStats(GetFsECBlockGroupStatsRequestProto)
      returns (GetFsECBlockGroupStatsResponseProto);
  rpc getDatanodeReport(GetDatanodeReportRequestProto)
      returns(GetDatanodeReportResponseProto);
  rpc getDatanodeStorageReport(GetDatanodeStorageReportRequestProto)
      returns(GetDatanodeStorageReportResponseProto);
  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 upgradeStatus(UpgradeStatusRequestProto)
      returns(UpgradeStatusResponseProto);
  rpc rollingUpgrade(RollingUpgradeRequestProto)
      returns(RollingUpgradeResponseProto);
  rpc listCorruptFileBlocks(ListCorruptFileBlocksRequestProto)
      returns(ListCorruptFileBlocksResponseProto);
  rpc metaSave(MetaSaveRequestProto) returns(MetaSaveResponseProto);
  rpc getFileInfo(GetFileInfoRequestProto) returns(GetFileInfoResponseProto);
  rpc getLocatedFileInfo(GetLocatedFileInfoRequestProto)
      returns(GetLocatedFileInfoResponseProto);
  rpc addCacheDirective(AddCacheDirectiveRequestProto)
      returns (AddCacheDirectiveResponseProto);
  rpc modifyCacheDirective(ModifyCacheDirectiveRequestProto)
      returns (ModifyCacheDirectiveResponseProto);
  rpc removeCacheDirective(RemoveCacheDirectiveRequestProto)
      returns (RemoveCacheDirectiveResponseProto);
  rpc listCacheDirectives(ListCacheDirectivesRequestProto)
      returns (ListCacheDirectivesResponseProto);
  rpc addCachePool(AddCachePoolRequestProto)
      returns(AddCachePoolResponseProto);
  rpc modifyCachePool(ModifyCachePoolRequestProto)
      returns(ModifyCachePoolResponseProto);
  rpc removeCachePool(RemoveCachePoolRequestProto)
      returns(RemoveCachePoolResponseProto);
  rpc listCachePools(ListCachePoolsRequestProto)
      returns(ListCachePoolsResponseProto);
  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 getSnapshotListing(GetSnapshotListingRequestProto)
      returns(GetSnapshotListingResponseProto);
  rpc deleteSnapshot(DeleteSnapshotRequestProto)
      returns(DeleteSnapshotResponseProto);
  rpc getSnapshotDiffReport(GetSnapshotDiffReportRequestProto)
      returns(GetSnapshotDiffReportResponseProto);
  rpc getSnapshotDiffReportListing(GetSnapshotDiffReportListingRequestProto)
      returns(GetSnapshotDiffReportListingResponseProto);
  rpc isFileClosed(IsFileClosedRequestProto)
      returns(IsFileClosedResponseProto);
  rpc modifyAclEntries(ModifyAclEntriesRequestProto)
      returns(ModifyAclEntriesResponseProto);
  rpc removeAclEntries(RemoveAclEntriesRequestProto)
      returns(RemoveAclEntriesResponseProto);
  rpc removeDefaultAcl(RemoveDefaultAclRequestProto)
      returns(RemoveDefaultAclResponseProto);
  rpc removeAcl(RemoveAclRequestProto)
      returns(RemoveAclResponseProto);
  rpc setAcl(SetAclRequestProto)
      returns(SetAclResponseProto);
  rpc getAclStatus(GetAclStatusRequestProto)
      returns(GetAclStatusResponseProto);
  rpc setXAttr(SetXAttrRequestProto)
      returns(SetXAttrResponseProto);
  rpc getXAttrs(GetXAttrsRequestProto)
      returns(GetXAttrsResponseProto);
  rpc listXAttrs(ListXAttrsRequestProto)
      returns(ListXAttrsResponseProto);
  rpc removeXAttr(RemoveXAttrRequestProto)
      returns(RemoveXAttrResponseProto);
  rpc checkAccess(CheckAccessRequestProto)
      returns(CheckAccessResponseProto);
  rpc createEncryptionZone(CreateEncryptionZoneRequestProto)
      returns(CreateEncryptionZoneResponseProto);
  rpc listEncryptionZones(ListEncryptionZonesRequestProto)
      returns(ListEncryptionZonesResponseProto);
  rpc reencryptEncryptionZone(ReencryptEncryptionZoneRequestProto)
      returns(ReencryptEncryptionZoneResponseProto);
  rpc listReencryptionStatus(ListReencryptionStatusRequestProto)
      returns(ListReencryptionStatusResponseProto);
  rpc getEZForPath(GetEZForPathRequestProto)
      returns(GetEZForPathResponseProto);
  rpc setErasureCodingPolicy(SetErasureCodingPolicyRequestProto)
      returns(SetErasureCodingPolicyResponseProto);
  rpc unsetErasureCodingPolicy(UnsetErasureCodingPolicyRequestProto)
      returns(UnsetErasureCodingPolicyResponseProto);
  rpc getECTopologyResultForPolicies(GetECTopologyResultForPoliciesRequestProto)
      returns(GetECTopologyResultForPoliciesResponseProto);
  rpc getCurrentEditLogTxid(GetCurrentEditLogTxidRequestProto)
      returns(GetCurrentEditLogTxidResponseProto);
  rpc getEditsFromTxid(GetEditsFromTxidRequestProto)
      returns(GetEditsFromTxidResponseProto);
  rpc getErasureCodingPolicies(GetErasureCodingPoliciesRequestProto)
      returns(GetErasureCodingPoliciesResponseProto);
  rpc addErasureCodingPolicies(AddErasureCodingPoliciesRequestProto)
      returns(AddErasureCodingPoliciesResponseProto);
  rpc removeErasureCodingPolicy(RemoveErasureCodingPolicyRequestProto)
      returns(RemoveErasureCodingPolicyResponseProto);
  rpc enableErasureCodingPolicy(EnableErasureCodingPolicyRequestProto)
      returns(EnableErasureCodingPolicyResponseProto);
  rpc disableErasureCodingPolicy(DisableErasureCodingPolicyRequestProto)
      returns(DisableErasureCodingPolicyResponseProto);
  rpc getErasureCodingPolicy(GetErasureCodingPolicyRequestProto)
      returns(GetErasureCodingPolicyResponseProto);
  rpc getErasureCodingCodecs(GetErasureCodingCodecsRequestProto)
      returns(GetErasureCodingCodecsResponseProto);
  rpc getQuotaUsage(GetQuotaUsageRequestProto)
      returns(GetQuotaUsageResponseProto);
  rpc listOpenFiles(ListOpenFilesRequestProto)
      returns(ListOpenFilesResponseProto);
  rpc msync(MsyncRequestProto)
      returns(MsyncResponseProto);
  rpc satisfyStoragePolicy(SatisfyStoragePolicyRequestProto)
      returns(SatisfyStoragePolicyResponseProto);
  rpc getHAServiceState(HAServiceStateRequestProto)
      returns(HAServiceStateResponseProto);
  rpc getSlowDatanodeReport(GetSlowDatanodeReportRequestProto)
      returns(GetSlowDatanodeReportResponseProto);
}