/**
* 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.protocol.HdfsConstants.MAX_PATH_DEPTH;
import static org.apache.hadoop.hdfs.protocol.HdfsConstants.MAX_PATH_LENGTH;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import org.apache.commons.logging.Log;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.fs.ContentSummary;
import org.apache.hadoop.fs.CreateFlag;
import org.apache.hadoop.fs.FsServerDefaults;
import org.apache.hadoop.fs.Options;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.UnresolvedLinkException;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.permission.PermissionStatus;
import static org.apache.hadoop.hdfs.DFSConfigKeys.*;
import org.apache.hadoop.hdfs.HDFSPolicyProvider;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.protocol.BlockListAsLongs;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.protocol.CorruptFileBlocks;
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.HdfsConstants;
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.UnregisteredNodeException;
import org.apache.hadoop.hdfs.protocol.UnresolvedPathException;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.UpgradeAction;
import org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys;
import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
import org.apache.hadoop.hdfs.server.common.IncorrectVersionException;
import org.apache.hadoop.hdfs.server.common.UpgradeStatusReport;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NamenodeRole;
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.NamenodeCommand;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol;
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.UpgradeCommand;
import org.apache.hadoop.io.EnumSetWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.ipc.ProtocolSignature;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.net.Node;
import org.apache.hadoop.security.AccessControlException;
import org.apache.hadoop.security.Groups;
import org.apache.hadoop.security.RefreshUserMappingsProtocol;
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.authorize.RefreshAuthorizationPolicyProtocol;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.SecretManager.InvalidToken;
import org.apache.hadoop.tools.GetUserMappingsProtocol;
/**
* 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;
// Dependencies from other parts of NN.
private 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 server;
protected final InetSocketAddress rpcAddress;
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);
InetSocketAddress socAddr = nn.getRpcServerAddress(conf);
InetSocketAddress dnSocketAddr = nn.getServiceRpcServerAddress(conf);
if (dnSocketAddr != null) {
int serviceHandlerCount =
conf.getInt(DFS_NAMENODE_SERVICE_HANDLER_COUNT_KEY,
DFS_NAMENODE_SERVICE_HANDLER_COUNT_DEFAULT);
this.serviceRpcServer = RPC.getServer(NamenodeProtocols.class, this,
dnSocketAddr.getHostName(), dnSocketAddr.getPort(), serviceHandlerCount,
false, conf, namesystem.getDelegationTokenSecretManager());
this.serviceRPCAddress = this.serviceRpcServer.getListenerAddress();
nn.setRpcServiceServerAddress(conf, serviceRPCAddress);
} else {
serviceRpcServer = null;
serviceRPCAddress = null;
}
this.server = RPC.getServer(NamenodeProtocols.class, this,
socAddr.getHostName(), socAddr.getPort(),
handlerCount, false, conf,
namesystem.getDelegationTokenSecretManager());
// set service-level authorization security policy
if (serviceAuthEnabled =
conf.getBoolean(
CommonConfigurationKeys.HADOOP_SECURITY_AUTHORIZATION, false)) {
this.server.refreshServiceAcl(conf, new HDFSPolicyProvider());
if (this.serviceRpcServer != null) {
this.serviceRpcServer.refreshServiceAcl(conf, new HDFSPolicyProvider());
}
}
// The rpc-server port can be ephemeral... ensure we have the correct info
this.rpcAddress = this.server.getListenerAddress();
nn.setRpcServerAddress(conf, rpcAddress);
}
/**
* Actually start serving requests.
*/
void start() {
server.start(); //start RPC server
if (serviceRpcServer != null) {
serviceRpcServer.start();
}
}
/**
* Wait until the RPC server has shut down.
*/
void join() throws InterruptedException {
this.server.join();
}
void stop() {
if(server != null) server.stop();
if(serviceRpcServer != null) serviceRpcServer.stop();
}
InetSocketAddress getServiceRpcAddress() {
return serviceRPCAddress;
}
InetSocketAddress getRpcAddress() {
return rpcAddress;
}
@Override // VersionedProtocol
public ProtocolSignature getProtocolSignature(String protocol,
long clientVersion, int clientMethodsHash) throws IOException {
return ProtocolSignature.getProtocolSignature(
this, protocol, clientVersion, clientMethodsHash);
}
@Override
public long getProtocolVersion(String protocol,
long clientVersion) throws IOException {
if (protocol.equals(ClientProtocol.class.getName())) {
return ClientProtocol.versionID;
} else if (protocol.equals(DatanodeProtocol.class.getName())){
return DatanodeProtocol.versionID;
} else if (protocol.equals(NamenodeProtocol.class.getName())){
return NamenodeProtocol.versionID;
} else if (protocol.equals(RefreshAuthorizationPolicyProtocol.class.getName())){
return RefreshAuthorizationPolicyProtocol.versionID;
} else if (protocol.equals(RefreshUserMappingsProtocol.class.getName())){
return RefreshUserMappingsProtocol.versionID;
} else if (protocol.equals(GetUserMappingsProtocol.class.getName())){
return GetUserMappingsProtocol.versionID;
} else {
throw new IOException("Unknown protocol to name node: " + protocol);
}
}
/////////////////////////////////////////////////////
// NamenodeProtocol
/////////////////////////////////////////////////////
@Override // NamenodeProtocol
public BlocksWithLocations getBlocks(DatanodeInfo datanode, long size)
throws IOException {
if(size <= 0) {
throw new IllegalArgumentException(
"Unexpected not positive size: "+size);
}
return namesystem.getBlockManager().getBlocks(datanode, size);
}
@Override // NamenodeProtocol
public ExportedBlockKeys getBlockKeys() throws IOException {
return namesystem.getBlockManager().getBlockKeys();
}
@Override // NamenodeProtocol
public void errorReport(NamenodeRegistration registration,
int errorCode,
String msg) throws IOException {
verifyRequest(registration);
LOG.info("Error report from " + registration + ": " + msg);
if(errorCode == FATAL)
namesystem.releaseBackupNode(registration);
}
@Override // NamenodeProtocol
public NamenodeRegistration register(NamenodeRegistration registration)
throws IOException {
verifyVersion(registration.getVersion());
NamenodeRegistration myRegistration = nn.setRegistration();
namesystem.registerBackupNode(registration, myRegistration);
return myRegistration;
}
@Override // NamenodeProtocol
public NamenodeCommand startCheckpoint(NamenodeRegistration registration)
throws IOException {
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 {
verifyRequest(registration);
if(!nn.isRole(NamenodeRole.NAMENODE))
throw new IOException("Only an ACTIVE node can invoke endCheckpoint.");
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 void 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.");
}
namesystem.startFile(src,
new PermissionStatus(UserGroupInformation.getCurrentUser().getShortUserName(),
null, masked),
clientName, clientMachine, flag.get(), createParent, replication, blockSize);
metrics.incrFilesCreated();
metrics.incrCreateFileOps();
}
@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 // ClientProtocol
public LocatedBlock addBlock(String src,
String clientName,
ExtendedBlock previous,
DatanodeInfo[] excludedNodes)
throws IOException {
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*BLOCK* NameNode.addBlock: file "
+src+" for "+clientName);
}
HashMap<Node, Node> excludedNodesSet = null;
if (excludedNodes != null) {
excludedNodesSet = new HashMap<Node, Node>(excludedNodes.length);
for (Node node:excludedNodes) {
excludedNodesSet.put(node, node);
}
}
LocatedBlock locatedBlock =
namesystem.getAdditionalBlock(src, clientName, previous, excludedNodesSet);
if (locatedBlock != null)
metrics.incrAddBlockOps();
return locatedBlock;
}
@Override // ClientProtocol
public LocatedBlock getAdditionalDatanode(final String src, final ExtendedBlock blk,
final DatanodeInfo[] existings, 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();
HashMap<Node, Node> excludeSet = null;
if (excludes != null) {
excludeSet = new HashMap<Node, Node>(excludes.length);
for (Node node : excludes) {
excludeSet.put(node, node);
}
}
return namesystem.getAdditionalDatanode(src, blk,
existings, excludeSet, numAdditionalNodes, clientName);
}
/**
* The client needs to give up on the block.
*/
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)
throws IOException {
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*DIR* NameNode.complete: "
+ src + " for " + clientName);
}
return namesystem.completeFile(src, clientName, last);
}
/**
* 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
public void reportBadBlocks(LocatedBlock[] blocks) throws IOException {
stateChangeLog.info("*DIR* NameNode.reportBadBlocks");
for (int i = 0; i < blocks.length; i++) {
ExtendedBlock blk = blocks[i].getBlock();
DatanodeInfo[] nodes = blocks[i].getLocations();
for (int j = 0; j < nodes.length; j++) {
DatanodeInfo dn = nodes[j];
namesystem.getBlockManager().findAndMarkBlockAsCorrupt(blk, dn,
"client machine reported it");
}
}
}
@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)
throws IOException {
namesystem.updatePipeline(clientName, oldBlock, newBlock, newNodes);
}
@Override // DatanodeProtocol
public void commitBlockSynchronization(ExtendedBlock block,
long newgenerationstamp, long newlength,
boolean closeFile, boolean deleteblock, DatanodeID[] newtargets)
throws IOException {
namesystem.commitBlockSynchronization(block,
newgenerationstamp, newlength, closeFile, deleteblock, newtargets);
}
@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(UserGroupInformation.getCurrentUser().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 HdfsFileStatus getFileLinkInfo(String src) throws IOException {
metrics.incrFileInfoOps();
return namesystem.getFileInfo(src, false);
}
@Override
public long[] getStats() {
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) throws IOException {
return namesystem.setSafeMode(action);
}
@Override // ClientProtocol
public boolean restoreFailedStorage(String arg)
throws AccessControlException {
return namesystem.restoreFailedStorage(arg);
}
@Override // ClientProtocol
public void saveNamespace() throws IOException {
namesystem.saveNamespace();
}
@Override // ClientProtocol
public void refreshNodes() throws IOException {
namesystem.refreshNodes();
}
@Override // NamenodeProtocol
public long getTransactionID() {
return namesystem.getEditLog().getSyncTxId();
}
@Override // NamenodeProtocol
public CheckpointSignature rollEditLog() throws IOException {
return namesystem.rollEditLog();
}
@Override
public RemoteEditLogManifest getEditLogManifest(long sinceTxId)
throws IOException {
return namesystem.getEditLog().getEditLogManifest(sinceTxId);
}
@Override // ClientProtocol
public void finalizeUpgrade() throws IOException {
namesystem.finalizeUpgrade();
}
@Override // ClientProtocol
public UpgradeStatusReport distributedUpgradeProgress(UpgradeAction action)
throws IOException {
return namesystem.distributedUpgradeProgress(action);
}
@Override // ClientProtocol
public void metaSave(String filename) throws IOException {
namesystem.metaSave(filename);
}
@Override // ClientProtocol
public CorruptFileBlocks listCorruptFileBlocks(String path, String cookie)
throws IOException {
Collection<FSNamesystem.CorruptFileBlockInfo> fbs =
namesystem.listCorruptFileBlocks(path, cookie);
String[] files = new String[fbs.size()];
String lastCookie = "";
int i = 0;
for(FSNamesystem.CorruptFileBlockInfo fb: fbs) {
files[i++] = fb.path;
lastCookie = fb.block.getBlockName();
}
return new CorruptFileBlocks(files, lastCookie);
}
/**
* Tell all datanodes to use a new, non-persistent bandwidth value for
* dfs.datanode.balance.bandwidthPerSec.
* @param bandwidth Blanacer 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) throws IOException {
namesystem.fsync(src, clientName);
}
@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 = UserGroupInformation.getCurrentUser();
namesystem.createSymlink(target, link,
new PermissionStatus(ugi.getShortUserName(), null, dirPerms), createParent);
}
@Override // ClientProtocol
public String getLinkTarget(String path) throws IOException {
metrics.incrGetLinkTargetOps();
try {
HdfsFileStatus stat = namesystem.getFileInfo(path, false);
if (stat != null) {
// NB: getSymlink throws IOException if !stat.isSymlink()
return stat.getSymlink();
}
} catch (UnresolvedPathException e) {
return e.getResolvedPath().toString();
} catch (UnresolvedLinkException e) {
// The NameNode should only throw an UnresolvedPathException
throw new AssertionError("UnresolvedLinkException thrown");
}
return null;
}
@Override // DatanodeProtocol
public DatanodeRegistration registerDatanode(DatanodeRegistration nodeReg)
throws IOException {
verifyVersion(nodeReg.getVersion());
namesystem.registerDatanode(nodeReg);
return nodeReg;
}
@Override // DatanodeProtocol
public DatanodeCommand[] sendHeartbeat(DatanodeRegistration nodeReg,
long capacity, long dfsUsed, long remaining, long blockPoolUsed,
int xmitsInProgress, int xceiverCount, int failedVolumes)
throws IOException {
verifyRequest(nodeReg);
return namesystem.handleHeartbeat(nodeReg, capacity, dfsUsed, remaining,
blockPoolUsed, xceiverCount, xmitsInProgress, failedVolumes);
}
@Override // DatanodeProtocol
public DatanodeCommand blockReport(DatanodeRegistration nodeReg,
String poolId, long[] blocks) throws IOException {
verifyRequest(nodeReg);
BlockListAsLongs blist = new BlockListAsLongs(blocks);
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*BLOCK* NameNode.blockReport: "
+ "from " + nodeReg.getName() + " " + blist.getNumberOfBlocks()
+ " blocks");
}
namesystem.getBlockManager().processReport(nodeReg, poolId, blist);
if (nn.getFSImage().isUpgradeFinalized())
return new DatanodeCommand.Finalize(poolId);
return null;
}
@Override // DatanodeProtocol
public void blockReceived(DatanodeRegistration nodeReg, String poolId,
Block blocks[], String delHints[]) throws IOException {
verifyRequest(nodeReg);
if(stateChangeLog.isDebugEnabled()) {
stateChangeLog.debug("*BLOCK* NameNode.blockReceived: "
+"from "+nodeReg.getName()+" "+blocks.length+" blocks.");
}
for (int i = 0; i < blocks.length; i++) {
namesystem.getBlockManager().blockReceived(
nodeReg, poolId, blocks[i], delHints[i]);
}
}
@Override // DatanodeProtocol
public void errorReport(DatanodeRegistration nodeReg,
int errorCode, String msg) throws IOException {
String dnName = (nodeReg == null ? "unknown DataNode" : nodeReg.getName());
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 {
return namesystem.getNamespaceInfo();
}
@Override // DatanodeProtocol
public UpgradeCommand processUpgradeCommand(UpgradeCommand comm) throws IOException {
return namesystem.processDistributedUpgradeCommand(comm);
}
/**
* Verify request.
*
* Verifies correctness of the datanode version, registration ID, and
* if the datanode does not need to be shutdown.
*
* @param nodeReg data node registration
* @throws IOException
*/
void verifyRequest(NodeRegistration nodeReg) throws IOException {
verifyVersion(nodeReg.getVersion());
if (!namesystem.getRegistrationID().equals(nodeReg.getRegistrationID())) {
LOG.warn("Invalid registrationID - expected: "
+ namesystem.getRegistrationID() + " received: "
+ nodeReg.getRegistrationID());
throw new UnregisteredNodeException(nodeReg);
}
}
@Override // RefreshAuthorizationPolicyProtocol
public void refreshServiceAcl() throws IOException {
if (!serviceAuthEnabled) {
throw new AuthorizationException("Service Level Authorization not enabled!");
}
this.server.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: " +
UserGroupInformation.getCurrentUser().getShortUserName());
Groups.getUserToGroupsMappingService().refresh();
}
@Override // RefreshAuthorizationPolicyProtocol
public void refreshSuperUserGroupsConfiguration() {
LOG.info("Refreshing SuperUser proxy group mapping list ");
ProxyUsers.refreshSuperUserGroupsConfiguration();
}
@Override // GetUserMappingsProtocol
public String[] getGroupsForUser(String user) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("Getting groups for user " + user);
}
return UserGroupInformation.createRemoteUser(user).getGroupNames();
}
/**
* Verify version.
*
* @param version
* @throws IOException
*/
void verifyVersion(int version) throws IOException {
if (version != HdfsConstants.LAYOUT_VERSION)
throw new IncorrectVersionException(version, "data node");
}
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;
}
}