/**
* 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 org.apache.hadoop.hdfs.server.namenode;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_HANDLER_COUNT_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_HANDLER_COUNT_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_SERVICE_HANDLER_COUNT_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_SERVICE_HANDLER_COUNT_KEY;
import static org.apache.hadoop.hdfs.protocol.HdfsConstants.MAX_PATH_DEPTH;
import static org.apache.hadoop.hdfs.protocol.HdfsConstants.MAX_PATH_LENGTH;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.Collection;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.hadoop.HadoopIllegalArgumentException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries;
import org.apache.hadoop.fs.CacheFlag;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.fs.ContentSummary;
import org.apache.hadoop.fs.CreateFlag;
import org.apache.hadoop.fs.FileAlreadyExistsException;
import org.apache.hadoop.fs.FsServerDefaults;
import org.apache.hadoop.fs.InvalidPathException;
import org.apache.hadoop.fs.Options;
import org.apache.hadoop.fs.ParentNotDirectoryException;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.UnresolvedLinkException;
import org.apache.hadoop.fs.permission.AclEntry;
import org.apache.hadoop.fs.permission.AclStatus;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import org.apache.hadoop.ha.HAServiceStatus;
import org.apache.hadoop.ha.HealthCheckFailedException;
import org.apache.hadoop.ha.ServiceFailedException;
import org.apache.hadoop.ha.proto.HAServiceProtocolProtos.HAServiceProtocolService;
import org.apache.hadoop.ha.protocolPB.HAServiceProtocolPB;
import org.apache.hadoop.ha.protocolPB.HAServiceProtocolServerSideTranslatorPB;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.HDFSPolicyProvider;
import org.apache.hadoop.hdfs.protocol.AclException;
import org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException;
import org.apache.hadoop.hdfs.protocol.BlockListAsLongs;
import org.apache.hadoop.hdfs.protocol.CacheDirectiveEntry;
import org.apache.hadoop.hdfs.protocol.CacheDirectiveInfo;
import org.apache.hadoop.hdfs.protocol.CachePoolEntry;
import org.apache.hadoop.hdfs.protocol.CachePoolInfo;
import org.apache.hadoop.hdfs.protocol.CorruptFileBlocks;
import org.apache.hadoop.hdfs.protocol.DSQuotaExceededException;
import org.apache.hadoop.hdfs.protocol.DatanodeID;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.DirectoryListing;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.FSLimitException;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.RollingUpgradeAction;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
import org.apache.hadoop.hdfs.protocol.NSQuotaExceededException;
import org.apache.hadoop.hdfs.protocol.QuotaExceededException;
import org.apache.hadoop.hdfs.protocol.RecoveryInProgressException;
import org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo;
import org.apache.hadoop.hdfs.protocol.SnapshotDiffReport;
import org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus;
import org.apache.hadoop.hdfs.protocol.UnregisteredNodeException;
import org.apache.hadoop.hdfs.protocol.UnresolvedPathException;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ClientNamenodeProtocol;
import org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos.DatanodeProtocolService;
import org.apache.hadoop.hdfs.protocol.proto.NamenodeProtocolProtos.NamenodeProtocolService;
import org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolPB;
import org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB;
import org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolPB;
import org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB;
import org.apache.hadoop.hdfs.protocolPB.NamenodeProtocolPB;
import org.apache.hadoop.hdfs.protocolPB.NamenodeProtocolServerSideTranslatorPB;
import org.apache.hadoop.hdfs.security.token.block.DataEncryptionKey;
import org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys;
import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NamenodeRole;
import org.apache.hadoop.hdfs.server.common.IncorrectVersionException;
import org.apache.hadoop.hdfs.server.namenode.NameNode.OperationCategory;
import org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeMetrics;
import org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods;
import org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations;
import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol;
import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.FinalizeCommand;
import org.apache.hadoop.hdfs.server.protocol.HeartbeatResponse;
import org.apache.hadoop.hdfs.server.protocol.NamenodeCommand;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
import org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
import org.apache.hadoop.hdfs.server.protocol.NodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.RemoteEditLogManifest;
import org.apache.hadoop.hdfs.server.protocol.StorageBlockReport;
import org.apache.hadoop.hdfs.server.protocol.StorageReceivedDeletedBlocks;
import org.apache.hadoop.hdfs.server.protocol.StorageReport;
import org.apache.hadoop.io.EnumSetWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.ipc.ProtobufRpcEngine;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.ipc.WritableRpcEngine;
import org.apache.hadoop.net.Node;
import org.apache.hadoop.security.AccessControlException;
import org.apache.hadoop.security.Groups;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.authorize.AuthorizationException;
import org.apache.hadoop.security.authorize.ProxyUsers;
import org.apache.hadoop.security.proto.RefreshAuthorizationPolicyProtocolProtos.RefreshAuthorizationPolicyProtocolService;
import org.apache.hadoop.security.proto.RefreshUserMappingsProtocolProtos.RefreshUserMappingsProtocolService;
import org.apache.hadoop.security.protocolPB.RefreshAuthorizationPolicyProtocolPB;
import org.apache.hadoop.security.protocolPB.RefreshAuthorizationPolicyProtocolServerSideTranslatorPB;
import org.apache.hadoop.security.protocolPB.RefreshUserMappingsProtocolPB;
import org.apache.hadoop.security.protocolPB.RefreshUserMappingsProtocolServerSideTranslatorPB;
import org.apache.hadoop.ipc.protocolPB.RefreshCallQueueProtocolPB;
import org.apache.hadoop.ipc.protocolPB.RefreshCallQueueProtocolServerSideTranslatorPB;
import org.apache.hadoop.ipc.proto.RefreshCallQueueProtocolProtos.RefreshCallQueueProtocolService;
import org.apache.hadoop.security.token.SecretManager.InvalidToken;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.tools.proto.GetUserMappingsProtocolProtos.GetUserMappingsProtocolService;
import org.apache.hadoop.tools.protocolPB.GetUserMappingsProtocolPB;
import org.apache.hadoop.tools.protocolPB.GetUserMappingsProtocolServerSideTranslatorPB;
import org.apache.hadoop.util.VersionInfo;
import org.apache.hadoop.util.VersionUtil;
import com.google.common.annotations.VisibleForTesting;
import com.google.protobuf.BlockingService;
/**
* This class is responsible for handling all of the RPC calls to the NameNode.
* It is created, started, and stopped by {@link NameNode}.
*/
class NameNodeRpcServer implements NamenodeProtocols {
private static final Log LOG = NameNode.LOG;
private static final Log stateChangeLog = NameNode.stateChangeLog;
private static final Log blockStateChangeLog = NameNode.blockStateChangeLog;
// Dependencies from other parts of NN.
protected final FSNamesystem namesystem;
protected final NameNode nn;
private final NameNodeMetrics metrics;
private final boolean serviceAuthEnabled;
/** The RPC server that listens to requests from DataNodes */
private final RPC.Server serviceRpcServer;
private final InetSocketAddress serviceRPCAddress;
/** The RPC server that listens to requests from clients */
protected final RPC.Server clientRpcServer;
protected final InetSocketAddress clientRpcAddress;
private final String minimumDataNodeVersion;
public NameNodeRpcServer(Configuration conf, NameNode nn)
throws IOException {
this.nn = nn;
this.namesystem = nn.getNamesystem();
this.metrics = NameNode.getNameNodeMetrics();
int handlerCount =
conf.getInt(DFS_NAMENODE_HANDLER_COUNT_KEY,
DFS_NAMENODE_HANDLER_COUNT_DEFAULT);
RPC.setProtocolEngine(conf, ClientNamenodeProtocolPB.class,
ProtobufRpcEngine.class);
ClientNamenodeProtocolServerSideTranslatorPB
clientProtocolServerTranslator =
new ClientNamenodeProtocolServerSideTranslatorPB(this);
BlockingService clientNNPbService = ClientNamenodeProtocol.
newReflectiveBlockingService(clientProtocolServerTranslator);
DatanodeProtocolServerSideTranslatorPB dnProtoPbTranslator =
new DatanodeProtocolServerSideTranslatorPB(this);
BlockingService dnProtoPbService = DatanodeProtocolService
.newReflectiveBlockingService(dnProtoPbTranslator);
NamenodeProtocolServerSideTranslatorPB namenodeProtocolXlator =
new NamenodeProtocolServerSideTranslatorPB(this);
BlockingService NNPbService = NamenodeProtocolService
.newReflectiveBlockingService(namenodeProtocolXlator);
RefreshAuthorizationPolicyProtocolServerSideTranslatorPB refreshAuthPolicyXlator =
new RefreshAuthorizationPolicyProtocolServerSideTranslatorPB(this);
BlockingService refreshAuthService = RefreshAuthorizationPolicyProtocolService
.newReflectiveBlockingService(refreshAuthPolicyXlator);
RefreshUserMappingsProtocolServerSideTranslatorPB refreshUserMappingXlator =
new RefreshUserMappingsProtocolServerSideTranslatorPB(this);
BlockingService refreshUserMappingService = RefreshUserMappingsProtocolService
.newReflectiveBlockingService(refreshUserMappingXlator);
RefreshCallQueueProtocolServerSideTranslatorPB refreshCallQueueXlator =
new RefreshCallQueueProtocolServerSideTranslatorPB(this);
BlockingService refreshCallQueueService = RefreshCallQueueProtocolService
.newReflectiveBlockingService(refreshCallQueueXlator);
GetUserMappingsProtocolServerSideTranslatorPB getUserMappingXlator =
new GetUserMappingsProtocolServerSideTranslatorPB(this);
BlockingService getUserMappingService = GetUserMappingsProtocolService
.newReflectiveBlockingService(getUserMappingXlator);
HAServiceProtocolServerSideTranslatorPB haServiceProtocolXlator =
new HAServiceProtocolServerSideTranslatorPB(this);
BlockingService haPbService = HAServiceProtocolService
.newReflectiveBlockingService(haServiceProtocolXlator);
WritableRpcEngine.ensureInitialized();
InetSocketAddress serviceRpcAddr = nn.getServiceRpcServerAddress(conf);
if (serviceRpcAddr != null) {
String bindHost = nn.getServiceRpcServerBindHost(conf);
if (bindHost == null) {
bindHost = serviceRpcAddr.getHostName();
}
LOG.info("Service RPC server is binding to " + bindHost + ":" +
serviceRpcAddr.getPort());
int serviceHandlerCount =
conf.getInt(DFS_NAMENODE_SERVICE_HANDLER_COUNT_KEY,
DFS_NAMENODE_SERVICE_HANDLER_COUNT_DEFAULT);
this.serviceRpcServer = new RPC.Builder(conf)
.setProtocol(
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolPB.class)
.setInstance(clientNNPbService)
.setBindAddress(bindHost)
.setPort(serviceRpcAddr.getPort()).setNumHandlers(serviceHandlerCount)
.setVerbose(false)
.setSecretManager(namesystem.getDelegationTokenSecretManager())
.build();
// Add all the RPC protocols that the namenode implements
DFSUtil.addPBProtocol(conf, HAServiceProtocolPB.class, haPbService,
serviceRpcServer);
DFSUtil.addPBProtocol(conf, NamenodeProtocolPB.class, NNPbService,
serviceRpcServer);
DFSUtil.addPBProtocol(conf, DatanodeProtocolPB.class, dnProtoPbService,
serviceRpcServer);
DFSUtil.addPBProtocol(conf, RefreshAuthorizationPolicyProtocolPB.class,
refreshAuthService, serviceRpcServer);
DFSUtil.addPBProtocol(conf, RefreshUserMappingsProtocolPB.class,
refreshUserMappingService, serviceRpcServer);
// We support Refreshing call queue here in case the client RPC queue is full
DFSUtil.addPBProtocol(conf, RefreshCallQueueProtocolPB.class,
refreshCallQueueService, serviceRpcServer);
DFSUtil.addPBProtocol(conf, GetUserMappingsProtocolPB.class,
getUserMappingService, serviceRpcServer);
// Update the address with the correct port
InetSocketAddress listenAddr = serviceRpcServer.getListenerAddress();
serviceRPCAddress = new InetSocketAddress(
serviceRpcAddr.getHostName(), listenAddr.getPort());
nn.setRpcServiceServerAddress(conf, serviceRPCAddress);
} else {
serviceRpcServer = null;
serviceRPCAddress = null;
}
InetSocketAddress rpcAddr = nn.getRpcServerAddress(conf);
String bindHost = nn.getRpcServerBindHost(conf);
if (bindHost == null) {
bindHost = rpcAddr.getHostName();
}
LOG.info("RPC server is binding to " + bindHost + ":" + rpcAddr.getPort());
this.clientRpcServer = new RPC.Builder(conf)
.setProtocol(
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolPB.class)
.setInstance(clientNNPbService).setBindAddress(bindHost)
.setPort(rpcAddr.getPort()).setNumHandlers(handlerCount)
.setVerbose(false)
.setSecretManager(namesystem.getDelegationTokenSecretManager()).build();
// Add all the RPC protocols that the namenode implements
DFSUtil.addPBProtocol(conf, HAServiceProtocolPB.class, haPbService,
clientRpcServer);
DFSUtil.addPBProtocol(conf, NamenodeProtocolPB.class, NNPbService,
clientRpcServer);
DFSUtil.addPBProtocol(conf, DatanodeProtocolPB.class, dnProtoPbService,
clientRpcServer);
DFSUtil.addPBProtocol(conf, RefreshAuthorizationPolicyProtocolPB.class,
refreshAuthService, clientRpcServer);
DFSUtil.addPBProtocol(conf, RefreshUserMappingsProtocolPB.class,
refreshUserMappingService, clientRpcServer);
DFSUtil.addPBProtocol(conf, RefreshCallQueueProtocolPB.class,
refreshCallQueueService, clientRpcServer);
DFSUtil.addPBProtocol(conf, GetUserMappingsProtocolPB.class,
getUserMappingService, clientRpcServer);
// set service-level authorization security policy
if (serviceAuthEnabled =
conf.getBoolean(
CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION, false)) {
clientRpcServer.refreshServiceAcl(conf, new HDFSPolicyProvider());
if (serviceRpcServer != null) {
serviceRpcServer.refreshServiceAcl(conf, new HDFSPolicyProvider());
}
}
// The rpc-server port can be ephemeral... ensure we have the correct info
InetSocketAddress listenAddr = clientRpcServer.getListenerAddress();
clientRpcAddress = new InetSocketAddress(
rpcAddr.getHostName(), listenAddr.getPort());
nn.setRpcServerAddress(conf, clientRpcAddress);
minimumDataNodeVersion = conf.get(
DFSConfigKeys.DFS_NAMENODE_MIN_SUPPORTED_DATANODE_VERSION_KEY,
DFSConfigKeys.DFS_NAMENODE_MIN_SUPPORTED_DATANODE_VERSION_DEFAULT);
// Set terse exception whose stack trace won't be logged
this.clientRpcServer.addTerseExceptions(SafeModeException.class,
FileNotFoundException.class,
HadoopIllegalArgumentException.class,
FileAlreadyExistsException.class,
InvalidPathException.class,
ParentNotDirectoryException.class,
UnresolvedLinkException.class,
AlreadyBeingCreatedException.class,
QuotaExceededException.class,
RecoveryInProgressException.class,
AccessControlException.class,
InvalidToken.class,
LeaseExpiredException.class,
NSQuotaExceededException.class,
DSQuotaExceededException.class,
AclException.class,
FSLimitException.PathComponentTooLongException.class,
FSLimitException.MaxDirectoryItemsExceededException.class);
}
/** Allow access to the client RPC server for testing */
@VisibleForTesting
RPC.Server getClientRpcServer() {
return clientRpcServer;
}
/**
* Start client and service RPC servers.
*/
void start() {
clientRpcServer.start();
if (serviceRpcServer != null) {
serviceRpcServer.start();
}
}
/**
* Wait until the RPC servers have shutdown.
*/
void join() throws InterruptedException {
clientRpcServer.join();
if (serviceRpcServer != null) {
serviceRpcServer.join();
}
}
/**
* Stop client and service RPC servers.
*/
void stop() {
if (clientRpcServer != null) {
clientRpcServer.stop();
}
if (serviceRpcServer != null) {
serviceRpcServer.stop();
}
}
InetSocketAddress getServiceRpcAddress() {
return serviceRPCAddress;
}
InetSocketAddress getRpcAddress() {
return clientRpcAddress;
}
private static UserGroupInformation getRemoteUser() throws IOException {
return NameNode.getRemoteUser();
}
/////////////////////////////////////////////////////
// NamenodeProtocol
/////////////////////////////////////////////////////
@Override // NamenodeProtocol
public BlocksWithLocations getBlocks(DatanodeInfo datanode, long size)
throws IOException {
if(size <= 0) {
throw new IllegalArgumentException(
"Unexpected not positive size: "+size);
}
namesystem.checkSuperuserPrivilege();
return namesystem.getBlockManager().getBlocks(datanode, size);
}
@Override // NamenodeProtocol
public ExportedBlockKeys getBlockKeys() throws IOException {
namesystem.checkSuperuserPrivilege();
return namesystem.getBlockManager().getBlockKeys();
}
@Override // NamenodeProtocol
public void errorReport(NamenodeRegistration registration,
int errorCode,
String msg) throws IOException {
namesystem.checkOperation(OperationCategory.UNCHECKED);
namesystem.checkSuperuserPrivilege();
verifyRequest(registration);
LOG.info("Error report from " + registration + ": " + msg);
if (errorCode == FATAL) {
namesystem.releaseBackupNode(registration);
}
}
@Override // NamenodeProtocol
public NamenodeRegistration registerSubordinateNamenode(
NamenodeRegistration registration) throws IOException {
namesystem.checkSuperuserPrivilege();
verifyLayoutVersion(registration.getVersion());
NamenodeRegistration myRegistration = nn.setRegistration();
namesystem.registerBackupNode(registration, myRegistration);
return myRegistration;
}
@Override // NamenodeProtocol
public NamenodeCommand startCheckpoint(NamenodeRegistration registration)
throws IOException {
namesystem.checkSuperuserPrivilege();
verifyRequest(registration);
if(!nn.isRole(NamenodeRole.NAMENODE))
throw new IOException("Only an ACTIVE node can invoke startCheckpoint.");
return namesystem.startCheckpoint(registration, nn.setRegistration());
}
@Override // NamenodeProtocol
public void endCheckpoint(NamenodeRegistration registration,
CheckpointSignature sig) throws IOException {
namesystem.checkSuperuserPrivilege();
namesystem.endCheckpoint(registration, sig);
}
@Override // ClientProtocol
public Token<DelegationTokenIdentifier> getDelegationToken(Text renewer)
throws IOException {
return namesystem.getDelegationToken(renewer);
}
@Override // ClientProtocol
public long renewDelegationToken(Token<DelegationTokenIdentifier> token)
throws InvalidToken, IOException {
return namesystem.renewDelegationToken(token);
}
@Override // ClientProtocol
public void cancelDelegationToken(Token<DelegationTokenIdentifier> token)
throws IOException {
namesystem.cancelDelegationToken(token);
}
@Override // ClientProtocol
public LocatedBlocks getBlockLocations(String src,
long offset,
long length)
throws IOException {
metrics.incrGetBlockLocations();
return namesystem.getBlockLocations(getClientMachine(),
src, offset, length);
}
@Override // ClientProtocol
public FsServerDefaults getServerDefaults() throws IOException {
return namesystem.getServerDefaults();
}
@Override // ClientProtocol
public HdfsFileStatus create(String src, FsPermission masked,
String clientName, EnumSetWritable<CreateFlag> flag,
boolean createParent, short replication, long blockSize)
throws IOException {
String clientMachine = getClientMachine();
if (stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*DIR* NameNode.create: file "
+src+" for "+clientName+" at "+clientMachine);
}
if (!checkPathLength(src)) {
throw new IOException("create: Pathname too long. Limit "
+ MAX_PATH_LENGTH + " characters, " + MAX_PATH_DEPTH + " levels.");
}
HdfsFileStatus fileStatus = namesystem.startFile(src, new PermissionStatus(
getRemoteUser().getShortUserName(), null, masked),
clientName, clientMachine, flag.get(), createParent, replication,
blockSize);
metrics.incrFilesCreated();
metrics.incrCreateFileOps();
return fileStatus;
}
@Override // ClientProtocol
public LocatedBlock append(String src, String clientName)
throws IOException {
String clientMachine = getClientMachine();
if (stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*DIR* NameNode.append: file "
+src+" for "+clientName+" at "+clientMachine);
}
LocatedBlock info = namesystem.appendFile(src, clientName, clientMachine);
metrics.incrFilesAppended();
return info;
}
@Override // ClientProtocol
public boolean recoverLease(String src, String clientName) throws IOException {
String clientMachine = getClientMachine();
return namesystem.recoverLease(src, clientName, clientMachine);
}
@Override // ClientProtocol
public boolean setReplication(String src, short replication)
throws IOException {
return namesystem.setReplication(src, replication);
}
@Override // ClientProtocol
public void setPermission(String src, FsPermission permissions)
throws IOException {
namesystem.setPermission(src, permissions);
}
@Override // ClientProtocol
public void setOwner(String src, String username, String groupname)
throws IOException {
namesystem.setOwner(src, username, groupname);
}
@Override
public LocatedBlock addBlock(String src, String clientName,
ExtendedBlock previous, DatanodeInfo[] excludedNodes, long fileId,
String[] favoredNodes)
throws IOException {
if (stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*BLOCK* NameNode.addBlock: file " + src
+ " fileId=" + fileId + " for " + clientName);
}
Set<Node> excludedNodesSet = null;
if (excludedNodes != null) {
excludedNodesSet = new HashSet<Node>(excludedNodes.length);
for (Node node : excludedNodes) {
excludedNodesSet.add(node);
}
}
List<String> favoredNodesList = (favoredNodes == null) ? null
: Arrays.asList(favoredNodes);
LocatedBlock locatedBlock = namesystem.getAdditionalBlock(src, fileId,
clientName, previous, excludedNodesSet, favoredNodesList);
if (locatedBlock != null)
metrics.incrAddBlockOps();
return locatedBlock;
}
@Override // ClientProtocol
public LocatedBlock getAdditionalDatanode(final String src, final ExtendedBlock blk,
final DatanodeInfo[] existings, final String[] existingStorageIDs,
final DatanodeInfo[] excludes,
final int numAdditionalNodes, final String clientName
) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("getAdditionalDatanode: src=" + src
+ ", blk=" + blk
+ ", existings=" + Arrays.asList(existings)
+ ", excludes=" + Arrays.asList(excludes)
+ ", numAdditionalNodes=" + numAdditionalNodes
+ ", clientName=" + clientName);
}
metrics.incrGetAdditionalDatanodeOps();
Set<Node> excludeSet = null;
if (excludes != null) {
excludeSet = new HashSet<Node>(excludes.length);
for (Node node : excludes) {
excludeSet.add(node);
}
}
return namesystem.getAdditionalDatanode(src, blk, existings,
existingStorageIDs, excludeSet, numAdditionalNodes, clientName);
}
/**
* The client needs to give up on the block.
*/
@Override // ClientProtocol
public void abandonBlock(ExtendedBlock b, String src, String holder)
throws IOException {
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*BLOCK* NameNode.abandonBlock: "
+b+" of file "+src);
}
if (!namesystem.abandonBlock(b, src, holder)) {
throw new IOException("Cannot abandon block during write to " + src);
}
}
@Override // ClientProtocol
public boolean complete(String src, String clientName,
ExtendedBlock last, long fileId)
throws IOException {
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*DIR* NameNode.complete: "
+ src + " fileId=" + fileId +" for " + clientName);
}
return namesystem.completeFile(src, clientName, last, fileId);
}
/**
* The client has detected an error on the specified located blocks
* and is reporting them to the server. For now, the namenode will
* mark the block as corrupt. In the future we might
* check the blocks are actually corrupt.
*/
@Override // ClientProtocol, DatanodeProtocol
public void reportBadBlocks(LocatedBlock[] blocks) throws IOException {
namesystem.reportBadBlocks(blocks);
}
@Override // ClientProtocol
public LocatedBlock updateBlockForPipeline(ExtendedBlock block, String clientName)
throws IOException {
return namesystem.updateBlockForPipeline(block, clientName);
}
@Override // ClientProtocol
public void updatePipeline(String clientName, ExtendedBlock oldBlock,
ExtendedBlock newBlock, DatanodeID[] newNodes, String[] newStorageIDs)
throws IOException {
namesystem.updatePipeline(clientName, oldBlock, newBlock, newNodes, newStorageIDs);
}
@Override // DatanodeProtocol
public void commitBlockSynchronization(ExtendedBlock block,
long newgenerationstamp, long newlength,
boolean closeFile, boolean deleteblock, DatanodeID[] newtargets,
String[] newtargetstorages)
throws IOException {
namesystem.commitBlockSynchronization(block, newgenerationstamp,
newlength, closeFile, deleteblock, newtargets, newtargetstorages);
}
@Override // ClientProtocol
public long getPreferredBlockSize(String filename)
throws IOException {
return namesystem.getPreferredBlockSize(filename);
}
@Deprecated
@Override // ClientProtocol
public boolean rename(String src, String dst) throws IOException {
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*DIR* NameNode.rename: " + src + " to " + dst);
}
if (!checkPathLength(dst)) {
throw new IOException("rename: Pathname too long. Limit "
+ MAX_PATH_LENGTH + " characters, " + MAX_PATH_DEPTH + " levels.");
}
boolean ret = namesystem.renameTo(src, dst);
if (ret) {
metrics.incrFilesRenamed();
}
return ret;
}
@Override // ClientProtocol
public void concat(String trg, String[] src) throws IOException {
namesystem.concat(trg, src);
}
@Override // ClientProtocol
public void rename2(String src, String dst, Options.Rename... options)
throws IOException {
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*DIR* NameNode.rename: " + src + " to " + dst);
}
if (!checkPathLength(dst)) {
throw new IOException("rename: Pathname too long. Limit "
+ MAX_PATH_LENGTH + " characters, " + MAX_PATH_DEPTH + " levels.");
}
namesystem.renameTo(src, dst, options);
metrics.incrFilesRenamed();
}
@Override // ClientProtocol
public boolean delete(String src, boolean recursive) throws IOException {
if (stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*DIR* Namenode.delete: src=" + src
+ ", recursive=" + recursive);
}
boolean ret = namesystem.delete(src, recursive);
if (ret)
metrics.incrDeleteFileOps();
return ret;
}
/**
* Check path length does not exceed maximum. Returns true if
* length and depth are okay. Returns false if length is too long
* or depth is too great.
*/
private boolean checkPathLength(String src) {
Path srcPath = new Path(src);
return (src.length() <= MAX_PATH_LENGTH &&
srcPath.depth() <= MAX_PATH_DEPTH);
}
@Override // ClientProtocol
public boolean mkdirs(String src, FsPermission masked, boolean createParent)
throws IOException {
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*DIR* NameNode.mkdirs: " + src);
}
if (!checkPathLength(src)) {
throw new IOException("mkdirs: Pathname too long. Limit "
+ MAX_PATH_LENGTH + " characters, " + MAX_PATH_DEPTH + " levels.");
}
return namesystem.mkdirs(src,
new PermissionStatus(getRemoteUser().getShortUserName(),
null, masked), createParent);
}
@Override // ClientProtocol
public void renewLease(String clientName) throws IOException {
namesystem.renewLease(clientName);
}
@Override // ClientProtocol
public DirectoryListing getListing(String src, byte[] startAfter,
boolean needLocation) throws IOException {
DirectoryListing files = namesystem.getListing(
src, startAfter, needLocation);
if (files != null) {
metrics.incrGetListingOps();
metrics.incrFilesInGetListingOps(files.getPartialListing().length);
}
return files;
}
@Override // ClientProtocol
public HdfsFileStatus getFileInfo(String src) throws IOException {
metrics.incrFileInfoOps();
return namesystem.getFileInfo(src, true);
}
@Override // ClientProtocol
public boolean isFileClosed(String src) throws IOException{
return namesystem.isFileClosed(src);
}
@Override // ClientProtocol
public HdfsFileStatus getFileLinkInfo(String src) throws IOException {
metrics.incrFileInfoOps();
return namesystem.getFileInfo(src, false);
}
@Override // ClientProtocol
public long[] getStats() throws IOException {
namesystem.checkOperation(OperationCategory.READ);
return namesystem.getStats();
}
@Override // ClientProtocol
public DatanodeInfo[] getDatanodeReport(DatanodeReportType type)
throws IOException {
DatanodeInfo results[] = namesystem.datanodeReport(type);
if (results == null ) {
throw new IOException("Cannot find datanode report");
}
return results;
}
@Override // ClientProtocol
public boolean setSafeMode(SafeModeAction action, boolean isChecked)
throws IOException {
OperationCategory opCategory = OperationCategory.UNCHECKED;
if (isChecked) {
if (action == SafeModeAction.SAFEMODE_GET) {
opCategory = OperationCategory.READ;
} else {
opCategory = OperationCategory.WRITE;
}
}
namesystem.checkOperation(opCategory);
return namesystem.setSafeMode(action);
}
@Override // ClientProtocol
public boolean restoreFailedStorage(String arg) throws IOException {
return namesystem.restoreFailedStorage(arg);
}
@Override // ClientProtocol
public void saveNamespace() throws IOException {
namesystem.saveNamespace();
}
@Override // ClientProtocol
public long rollEdits() throws AccessControlException, IOException {
CheckpointSignature sig = namesystem.rollEditLog();
return sig.getCurSegmentTxId();
}
@Override // ClientProtocol
public void refreshNodes() throws IOException {
namesystem.refreshNodes();
}
@Override // NamenodeProtocol
public long getTransactionID() throws IOException {
namesystem.checkOperation(OperationCategory.UNCHECKED);
namesystem.checkSuperuserPrivilege();
return namesystem.getFSImage().getLastAppliedOrWrittenTxId();
}
@Override // NamenodeProtocol
public long getMostRecentCheckpointTxId() throws IOException {
namesystem.checkOperation(OperationCategory.UNCHECKED);
namesystem.checkSuperuserPrivilege();
return namesystem.getFSImage().getMostRecentCheckpointTxId();
}
@Override // NamenodeProtocol
public CheckpointSignature rollEditLog() throws IOException {
namesystem.checkSuperuserPrivilege();
return namesystem.rollEditLog();
}
@Override // NamenodeProtocol
public RemoteEditLogManifest getEditLogManifest(long sinceTxId)
throws IOException {
namesystem.checkOperation(OperationCategory.READ);
namesystem.checkSuperuserPrivilege();
return namesystem.getEditLog().getEditLogManifest(sinceTxId);
}
@Override // ClientProtocol
public void finalizeUpgrade() throws IOException {
namesystem.finalizeUpgrade();
}
@Override // ClientProtocol
public RollingUpgradeInfo rollingUpgrade(RollingUpgradeAction action) throws IOException {
LOG.info("rollingUpgrade " + action);
switch(action) {
case QUERY:
return namesystem.queryRollingUpgrade();
case PREPARE:
return namesystem.startRollingUpgrade();
case FINALIZE:
return namesystem.finalizeRollingUpgrade();
default:
throw new UnsupportedActionException(action + " is not yet supported.");
}
}
@Override // ClientProtocol
public void metaSave(String filename) throws IOException {
namesystem.metaSave(filename);
}
@Override // ClientProtocol
public CorruptFileBlocks listCorruptFileBlocks(String path, String cookie)
throws IOException {
String[] cookieTab = new String[] { cookie };
Collection<FSNamesystem.CorruptFileBlockInfo> fbs =
namesystem.listCorruptFileBlocks(path, cookieTab);
String[] files = new String[fbs.size()];
int i = 0;
for(FSNamesystem.CorruptFileBlockInfo fb: fbs) {
files[i++] = fb.path;
}
return new CorruptFileBlocks(files, cookieTab[0]);
}
/**
* Tell all datanodes to use a new, non-persistent bandwidth value for
* dfs.datanode.balance.bandwidthPerSec.
* @param bandwidth Balancer bandwidth in bytes per second for all datanodes.
* @throws IOException
*/
@Override // ClientProtocol
public void setBalancerBandwidth(long bandwidth) throws IOException {
namesystem.setBalancerBandwidth(bandwidth);
}
@Override // ClientProtocol
public ContentSummary getContentSummary(String path) throws IOException {
return namesystem.getContentSummary(path);
}
@Override // ClientProtocol
public void setQuota(String path, long namespaceQuota, long diskspaceQuota)
throws IOException {
namesystem.setQuota(path, namespaceQuota, diskspaceQuota);
}
@Override // ClientProtocol
public void fsync(String src, String clientName, long lastBlockLength)
throws IOException {
namesystem.fsync(src, clientName, lastBlockLength);
}
@Override // ClientProtocol
public void setTimes(String src, long mtime, long atime)
throws IOException {
namesystem.setTimes(src, mtime, atime);
}
@Override // ClientProtocol
public void createSymlink(String target, String link, FsPermission dirPerms,
boolean createParent) throws IOException {
metrics.incrCreateSymlinkOps();
/* We enforce the MAX_PATH_LENGTH limit even though a symlink target
* URI may refer to a non-HDFS file system.
*/
if (!checkPathLength(link)) {
throw new IOException("Symlink path exceeds " + MAX_PATH_LENGTH +
" character limit");
}
if ("".equals(target)) {
throw new IOException("Invalid symlink target");
}
final UserGroupInformation ugi = getRemoteUser();
namesystem.createSymlink(target, link,
new PermissionStatus(ugi.getShortUserName(), null, dirPerms), createParent);
}
@Override // ClientProtocol
public String getLinkTarget(String path) throws IOException {
metrics.incrGetLinkTargetOps();
HdfsFileStatus stat = null;
try {
stat = namesystem.getFileInfo(path, false);
} catch (UnresolvedPathException e) {
return e.getResolvedPath().toString();
} catch (UnresolvedLinkException e) {
// The NameNode should only throw an UnresolvedPathException
throw new AssertionError("UnresolvedLinkException thrown");
}
if (stat == null) {
throw new FileNotFoundException("File does not exist: " + path);
} else if (!stat.isSymlink()) {
throw new IOException("Path " + path + " is not a symbolic link");
}
return stat.getSymlink();
}
@Override // DatanodeProtocol
public DatanodeRegistration registerDatanode(DatanodeRegistration nodeReg)
throws IOException {
verifySoftwareVersion(nodeReg);
namesystem.registerDatanode(nodeReg);
return nodeReg;
}
@Override // DatanodeProtocol
public HeartbeatResponse sendHeartbeat(DatanodeRegistration nodeReg,
StorageReport[] report, long dnCacheCapacity, long dnCacheUsed,
int xmitsInProgress, int xceiverCount,
int failedVolumes) throws IOException {
verifyRequest(nodeReg);
return namesystem.handleHeartbeat(nodeReg, report,
dnCacheCapacity, dnCacheUsed, xceiverCount, xmitsInProgress,
failedVolumes);
}
@Override // DatanodeProtocol
public DatanodeCommand blockReport(DatanodeRegistration nodeReg,
String poolId, StorageBlockReport[] reports) throws IOException {
verifyRequest(nodeReg);
if(blockStateChangeLog.isDebugEnabled()) {
blockStateChangeLog.debug("*BLOCK* NameNode.blockReport: "
+ "from " + nodeReg + ", reports.length=" + reports.length);
}
final BlockManager bm = namesystem.getBlockManager();
boolean hasStaleStorages = true;
for(StorageBlockReport r : reports) {
final BlockListAsLongs blocks = new BlockListAsLongs(r.getBlocks());
hasStaleStorages = bm.processReport(nodeReg, r.getStorage(), poolId, blocks);
}
if (nn.getFSImage().isUpgradeFinalized() &&
!nn.isStandbyState() &&
!hasStaleStorages) {
return new FinalizeCommand(poolId);
}
return null;
}
@Override
public DatanodeCommand cacheReport(DatanodeRegistration nodeReg,
String poolId, List<Long> blockIds) throws IOException {
verifyRequest(nodeReg);
if (blockStateChangeLog.isDebugEnabled()) {
blockStateChangeLog.debug("*BLOCK* NameNode.cacheReport: "
+ "from " + nodeReg + " " + blockIds.size() + " blocks");
}
namesystem.getCacheManager().processCacheReport(nodeReg, blockIds);
return null;
}
@Override // DatanodeProtocol
public void blockReceivedAndDeleted(DatanodeRegistration nodeReg, String poolId,
StorageReceivedDeletedBlocks[] receivedAndDeletedBlocks) throws IOException {
verifyRequest(nodeReg);
metrics.incrBlockReceivedAndDeletedOps();
if(blockStateChangeLog.isDebugEnabled()) {
blockStateChangeLog.debug("*BLOCK* NameNode.blockReceivedAndDeleted: "
+"from "+nodeReg+" "+receivedAndDeletedBlocks.length
+" blocks.");
}
for(StorageReceivedDeletedBlocks r : receivedAndDeletedBlocks) {
namesystem.processIncrementalBlockReport(nodeReg, poolId, r);
}
}
@Override // DatanodeProtocol
public void errorReport(DatanodeRegistration nodeReg,
int errorCode, String msg) throws IOException {
String dnName =
(nodeReg == null) ? "Unknown DataNode" : nodeReg.toString();
if (errorCode == DatanodeProtocol.NOTIFY) {
LOG.info("Error report from " + dnName + ": " + msg);
return;
}
verifyRequest(nodeReg);
if (errorCode == DatanodeProtocol.DISK_ERROR) {
LOG.warn("Disk error on " + dnName + ": " + msg);
} else if (errorCode == DatanodeProtocol.FATAL_DISK_ERROR) {
LOG.warn("Fatal disk error on " + dnName + ": " + msg);
namesystem.getBlockManager().getDatanodeManager().removeDatanode(nodeReg);
} else {
LOG.info("Error report from " + dnName + ": " + msg);
}
}
@Override // DatanodeProtocol, NamenodeProtocol
public NamespaceInfo versionRequest() throws IOException {
namesystem.checkSuperuserPrivilege();
return namesystem.getNamespaceInfo();
}
/**
* Verifies the given registration.
*
* @param nodeReg node registration
* @throws UnregisteredNodeException if the registration is invalid
*/
private void verifyRequest(NodeRegistration nodeReg) throws IOException {
// verify registration ID
final String id = nodeReg.getRegistrationID();
final String expectedID = namesystem.getRegistrationID();
if (!expectedID.equals(id)) {
LOG.warn("Registration IDs mismatched: the "
+ nodeReg.getClass().getSimpleName() + " ID is " + id
+ " but the expected ID is " + expectedID);
throw new UnregisteredNodeException(nodeReg);
}
}
@Override // RefreshAuthorizationPolicyProtocol
public void refreshServiceAcl() throws IOException {
if (!serviceAuthEnabled) {
throw new AuthorizationException("Service Level Authorization not enabled!");
}
this.clientRpcServer.refreshServiceAcl(new Configuration(), new HDFSPolicyProvider());
if (this.serviceRpcServer != null) {
this.serviceRpcServer.refreshServiceAcl(new Configuration(), new HDFSPolicyProvider());
}
}
@Override // RefreshAuthorizationPolicyProtocol
public void refreshUserToGroupsMappings() throws IOException {
LOG.info("Refreshing all user-to-groups mappings. Requested by user: " +
getRemoteUser().getShortUserName());
Groups.getUserToGroupsMappingService().refresh();
}
@Override // RefreshAuthorizationPolicyProtocol
public void refreshSuperUserGroupsConfiguration() {
LOG.info("Refreshing SuperUser proxy group mapping list ");
ProxyUsers.refreshSuperUserGroupsConfiguration();
}
@Override // RefreshCallQueueProtocol
public void refreshCallQueue() {
LOG.info("Refreshing call queue.");
Configuration conf = new Configuration();
clientRpcServer.refreshCallQueue(conf);
if (this.serviceRpcServer != null) {
serviceRpcServer.refreshCallQueue(conf);
}
}
@Override // GetUserMappingsProtocol
public String[] getGroupsForUser(String user) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("Getting groups for user " + user);
}
return UserGroupInformation.createRemoteUser(user).getGroupNames();
}
@Override // HAServiceProtocol
public synchronized void monitorHealth()
throws HealthCheckFailedException, AccessControlException {
nn.monitorHealth();
}
@Override // HAServiceProtocol
public synchronized void transitionToActive(StateChangeRequestInfo req)
throws ServiceFailedException, AccessControlException {
nn.checkHaStateChange(req);
nn.transitionToActive();
}
@Override // HAServiceProtocol
public synchronized void transitionToStandby(StateChangeRequestInfo req)
throws ServiceFailedException, AccessControlException {
nn.checkHaStateChange(req);
nn.transitionToStandby();
}
@Override // HAServiceProtocol
public synchronized HAServiceStatus getServiceStatus()
throws AccessControlException, ServiceFailedException {
return nn.getServiceStatus();
}
/**
* Verify version.
*
* @param version
* @throws IOException
*/
void verifyLayoutVersion(int version) throws IOException {
if (version != HdfsConstants.NAMENODE_LAYOUT_VERSION)
throw new IncorrectVersionException(
HdfsConstants.NAMENODE_LAYOUT_VERSION, version, "data node");
}
private void verifySoftwareVersion(DatanodeRegistration dnReg)
throws IncorrectVersionException {
String dnVersion = dnReg.getSoftwareVersion();
if (VersionUtil.compareVersions(dnVersion, minimumDataNodeVersion) < 0) {
IncorrectVersionException ive = new IncorrectVersionException(
minimumDataNodeVersion, dnVersion, "DataNode", "NameNode");
LOG.warn(ive.getMessage() + " DN: " + dnReg);
throw ive;
}
String nnVersion = VersionInfo.getVersion();
if (!dnVersion.equals(nnVersion)) {
String messagePrefix = "Reported DataNode version '" + dnVersion +
"' of DN " + dnReg + " does not match NameNode version '" +
nnVersion + "'";
long nnCTime = nn.getFSImage().getStorage().getCTime();
long dnCTime = dnReg.getStorageInfo().getCTime();
if (nnCTime != dnCTime) {
IncorrectVersionException ive = new IncorrectVersionException(
messagePrefix + " and CTime of DN ('" + dnCTime +
"') does not match CTime of NN ('" + nnCTime + "')");
LOG.warn(ive);
throw ive;
} else {
LOG.info(messagePrefix +
". Note: This is normal during a rolling upgrade.");
}
}
}
private static String getClientMachine() {
String clientMachine = NamenodeWebHdfsMethods.getRemoteAddress();
if (clientMachine == null) { //not a web client
clientMachine = Server.getRemoteAddress();
}
if (clientMachine == null) { //not a RPC client
clientMachine = "";
}
return clientMachine;
}
@Override
public DataEncryptionKey getDataEncryptionKey() throws IOException {
return namesystem.getBlockManager().generateDataEncryptionKey();
}
@Override
public String createSnapshot(String snapshotRoot, String snapshotName)
throws IOException {
if (!checkPathLength(snapshotRoot)) {
throw new IOException("createSnapshot: Pathname too long. Limit "
+ MAX_PATH_LENGTH + " characters, " + MAX_PATH_DEPTH + " levels.");
}
metrics.incrCreateSnapshotOps();
return namesystem.createSnapshot(snapshotRoot, snapshotName);
}
@Override
public void deleteSnapshot(String snapshotRoot, String snapshotName)
throws IOException {
metrics.incrDeleteSnapshotOps();
namesystem.deleteSnapshot(snapshotRoot, snapshotName);
}
@Override
// Client Protocol
public void allowSnapshot(String snapshotRoot) throws IOException {
metrics.incrAllowSnapshotOps();
namesystem.allowSnapshot(snapshotRoot);
}
@Override
// Client Protocol
public void disallowSnapshot(String snapshot) throws IOException {
metrics.incrDisAllowSnapshotOps();
namesystem.disallowSnapshot(snapshot);
}
@Override
public void renameSnapshot(String snapshotRoot, String snapshotOldName,
String snapshotNewName) throws IOException {
if (snapshotNewName == null || snapshotNewName.isEmpty()) {
throw new IOException("The new snapshot name is null or empty.");
}
metrics.incrRenameSnapshotOps();
namesystem.renameSnapshot(snapshotRoot, snapshotOldName, snapshotNewName);
}
@Override // Client Protocol
public SnapshottableDirectoryStatus[] getSnapshottableDirListing()
throws IOException {
SnapshottableDirectoryStatus[] status = namesystem
.getSnapshottableDirListing();
metrics.incrListSnapshottableDirOps();
return status;
}
@Override
public SnapshotDiffReport getSnapshotDiffReport(String snapshotRoot,
String earlierSnapshotName, String laterSnapshotName) throws IOException {
SnapshotDiffReport report = namesystem.getSnapshotDiffReport(snapshotRoot,
earlierSnapshotName, laterSnapshotName);
metrics.incrSnapshotDiffReportOps();
return report;
}
@Override
public long addCacheDirective(
CacheDirectiveInfo path, EnumSet<CacheFlag> flags) throws IOException {
return namesystem.addCacheDirective(path, flags);
}
@Override
public void modifyCacheDirective(
CacheDirectiveInfo directive, EnumSet<CacheFlag> flags) throws IOException {
namesystem.modifyCacheDirective(directive, flags);
}
@Override
public void removeCacheDirective(long id) throws IOException {
namesystem.removeCacheDirective(id);
}
@Override
public BatchedEntries<CacheDirectiveEntry> listCacheDirectives(long prevId,
CacheDirectiveInfo filter) throws IOException {
if (filter == null) {
filter = new CacheDirectiveInfo.Builder().build();
}
return namesystem.listCacheDirectives(prevId, filter);
}
@Override
public void addCachePool(CachePoolInfo info) throws IOException {
namesystem.addCachePool(info);
}
@Override
public void modifyCachePool(CachePoolInfo info) throws IOException {
namesystem.modifyCachePool(info);
}
@Override
public void removeCachePool(String cachePoolName) throws IOException {
namesystem.removeCachePool(cachePoolName);
}
@Override
public BatchedEntries<CachePoolEntry> listCachePools(String prevKey)
throws IOException {
return namesystem.listCachePools(prevKey != null ? prevKey : "");
}
@Override
public void modifyAclEntries(String src, List<AclEntry> aclSpec)
throws IOException {
namesystem.modifyAclEntries(src, aclSpec);
}
@Override
public void removeAclEntries(String src, List<AclEntry> aclSpec)
throws IOException {
namesystem.removeAclEntries(src, aclSpec);
}
@Override
public void removeDefaultAcl(String src) throws IOException {
namesystem.removeDefaultAcl(src);
}
@Override
public void removeAcl(String src) throws IOException {
namesystem.removeAcl(src);
}
@Override
public void setAcl(String src, List<AclEntry> aclSpec) throws IOException {
namesystem.setAcl(src, aclSpec);
}
@Override
public AclStatus getAclStatus(String src) throws IOException {
return namesystem.getAclStatus(src);
}
}