/*
* 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.cloudstack.storage.motion;
import java.util.HashMap;
import java.util.Map;
import javax.inject.Inject;
import org.apache.cloudstack.engine.subsystem.api.storage.ClusterScope;
import org.apache.cloudstack.engine.subsystem.api.storage.CopyCommandResult;
import org.apache.cloudstack.engine.subsystem.api.storage.DataMotionStrategy;
import org.apache.cloudstack.engine.subsystem.api.storage.DataObject;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStore;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreManager;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPoint;
import org.apache.cloudstack.engine.subsystem.api.storage.EndPointSelector;
import org.apache.cloudstack.engine.subsystem.api.storage.HostScope;
import org.apache.cloudstack.engine.subsystem.api.storage.ObjectInDataStoreStateMachine.Event;
import org.apache.cloudstack.engine.subsystem.api.storage.Scope;
import org.apache.cloudstack.engine.subsystem.api.storage.SnapshotInfo;
import org.apache.cloudstack.engine.subsystem.api.storage.StorageAction;
import org.apache.cloudstack.engine.subsystem.api.storage.StorageCacheManager;
import org.apache.cloudstack.engine.subsystem.api.storage.StrategyPriority;
import org.apache.cloudstack.engine.subsystem.api.storage.VolumeInfo;
import org.apache.cloudstack.engine.subsystem.api.storage.ZoneScope;
import org.apache.cloudstack.framework.async.AsyncCompletionCallback;
import org.apache.cloudstack.framework.config.dao.ConfigurationDao;
import org.apache.cloudstack.storage.RemoteHostEndPoint;
import org.apache.cloudstack.storage.command.CopyCommand;
import org.apache.cloudstack.storage.image.datastore.ImageStoreEntity;
import org.apache.cloudstack.storage.to.PrimaryDataStoreTO;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;
import com.cloud.agent.api.Answer;
import com.cloud.agent.api.storage.MigrateVolumeAnswer;
import com.cloud.agent.api.storage.MigrateVolumeCommand;
import com.cloud.agent.api.to.DataObjectType;
import com.cloud.agent.api.to.DataStoreTO;
import com.cloud.agent.api.to.DataTO;
import com.cloud.agent.api.to.NfsTO;
import com.cloud.agent.api.to.VirtualMachineTO;
import com.cloud.capacity.CapacityManager;
import com.cloud.configuration.Config;
import com.cloud.host.Host;
import com.cloud.hypervisor.Hypervisor;
import com.cloud.storage.DataStoreRole;
import com.cloud.storage.Storage.StoragePoolType;
import com.cloud.storage.StoragePool;
import com.cloud.storage.VolumeVO;
import com.cloud.storage.dao.VolumeDao;
import com.cloud.utils.NumbersUtil;
import com.cloud.utils.db.DB;
import com.cloud.utils.exception.CloudRuntimeException;
import com.cloud.vm.VirtualMachineManager;
@Component
public class AncientDataMotionStrategy implements DataMotionStrategy {
private static final Logger s_logger = Logger.getLogger(AncientDataMotionStrategy.class);
@Inject
EndPointSelector selector;
@Inject
ConfigurationDao configDao;
@Inject
VolumeDao volDao;
@Inject
DataStoreManager dataStoreMgr;
@Inject
StorageCacheManager cacheMgr;
@Override
public StrategyPriority canHandle(DataObject srcData, DataObject destData) {
return StrategyPriority.DEFAULT;
}
@Override
public StrategyPriority canHandle(Map<VolumeInfo, DataStore> volumeMap, Host srcHost, Host destHost) {
return StrategyPriority.CANT_HANDLE;
}
protected boolean needCacheStorage(DataObject srcData, DataObject destData) {
DataTO srcTO = srcData.getTO();
DataStoreTO srcStoreTO = srcTO.getDataStore();
if (srcStoreTO instanceof NfsTO || srcStoreTO.getRole() == DataStoreRole.ImageCache) {
return false;
}
DataTO destTO = destData.getTO();
DataStoreTO destStoreTO = destTO.getDataStore();
if (destStoreTO instanceof NfsTO || destStoreTO.getRole() == DataStoreRole.ImageCache) {
return false;
}
if (s_logger.isDebugEnabled()) {
s_logger.debug("needCacheStorage true, dest at " + destTO.getPath() + " dest role " + destStoreTO.getRole().toString() + srcTO.getPath() + " src role " +
srcStoreTO.getRole().toString());
}
return true;
}
private Scope getZoneScope(Scope destScope) {
ZoneScope zoneScope = null;
if (destScope instanceof ClusterScope) {
ClusterScope clusterScope = (ClusterScope)destScope;
zoneScope = new ZoneScope(clusterScope.getZoneId());
} else if (destScope instanceof HostScope) {
HostScope hostScope = (HostScope)destScope;
zoneScope = new ZoneScope(hostScope.getZoneId());
} else {
zoneScope = (ZoneScope)destScope;
}
return zoneScope;
}
private Scope pickCacheScopeForCopy(DataObject srcData, DataObject destData) {
Scope srcScope = srcData.getDataStore().getScope();
Scope destScope = destData.getDataStore().getScope();
Scope selectedScope = null;
if (srcScope.getScopeId() != null) {
selectedScope = getZoneScope(srcScope);
} else if (destScope.getScopeId() != null) {
selectedScope = getZoneScope(destScope);
} else {
s_logger.warn("Cannot find a zone-wide scope for movement that needs a cache storage");
}
return selectedScope;
}
protected Answer copyObject(DataObject srcData, DataObject destData, Host destHost) {
String value = configDao.getValue(Config.PrimaryStorageDownloadWait.toString());
int _primaryStorageDownloadWait = NumbersUtil.parseInt(value, Integer.parseInt(Config.PrimaryStorageDownloadWait.getDefaultValue()));
Answer answer = null;
DataObject cacheData = null;
DataObject srcForCopy = srcData;
try {
if (needCacheStorage(srcData, destData)) {
Scope destScope = pickCacheScopeForCopy(srcData, destData);
srcForCopy = cacheData = cacheMgr.createCacheObject(srcData, destScope);
}
CopyCommand cmd = new CopyCommand(srcForCopy.getTO(), addFullCloneFlagOnVMwareDest(destData.getTO()), _primaryStorageDownloadWait, VirtualMachineManager.ExecuteInSequence.value());
EndPoint ep = destHost != null ? RemoteHostEndPoint.getHypervisorHostEndPoint(destHost) : selector.select(srcForCopy, destData);
if (ep == null) {
String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
s_logger.error(errMsg);
answer = new Answer(cmd, false, errMsg);
} else {
answer = ep.sendMessage(cmd);
}
if (cacheData != null) {
final Long cacheId = cacheData.getId();
final String cacheType = cacheData.getType().toString();
final String cacheUuid = cacheData.getUuid().toString();
if (srcData.getType() == DataObjectType.VOLUME &&
(destData.getType() == DataObjectType.VOLUME ||
destData.getType() == DataObjectType.TEMPLATE)) {
// volume transfer from primary to secondary. Volume transfer between primary pools are already handled by copyVolumeBetweenPools
// Delete cache in order to certainly transfer a latest image.
s_logger.debug("Delete " + cacheType + " cache(id: " + cacheId +
", uuid: " + cacheUuid + ")");
cacheMgr.deleteCacheObject(srcForCopy);
} else {
// for template, we want to leave it on cache for performance reason
if ((answer == null || !answer.getResult()) && srcForCopy.getRefCount() < 2) {
// cache object created by this copy, not already there
s_logger.warn("Copy may not be handled correctly by agent(id: " + (ep != null ? ep.getId() : "\"unspecified\"") + ")." +
" Delete " + cacheType + " cache(id: " + cacheId +
", uuid: " + cacheUuid + ")");
cacheMgr.deleteCacheObject(srcForCopy);
} else {
s_logger.debug("Decrease reference count of " + cacheType +
" cache(id: " + cacheId + ", uuid: " + cacheUuid + ")");
cacheMgr.releaseCacheObject(srcForCopy);
}
}
}
return answer;
} catch (Exception e) {
s_logger.debug("copy object failed: ", e);
if (cacheData != null) {
cacheMgr.deleteCacheObject(cacheData);
}
throw new CloudRuntimeException(e.toString());
}
}
/**
* Adds {@code 'vmware.create.full.clone'} value for a given primary storage, whose HV is VMware, on datastore's {@code fullCloneFlag} field
* @param dataTO Dest data store TO
* @return dataTO including fullCloneFlag, if provided
*/
protected DataTO addFullCloneFlagOnVMwareDest(DataTO dataTO) {
if (dataTO != null && dataTO.getHypervisorType().equals(Hypervisor.HypervisorType.VMware)){
DataStoreTO dataStoreTO = dataTO.getDataStore();
if (dataStoreTO != null && dataStoreTO instanceof PrimaryDataStoreTO){
PrimaryDataStoreTO primaryDataStoreTO = (PrimaryDataStoreTO) dataStoreTO;
Boolean value = CapacityManager.VmwareCreateCloneFull.valueIn(primaryDataStoreTO.getId());
primaryDataStoreTO.setFullCloneFlag(value);
}
}
return dataTO;
}
protected Answer copyObject(DataObject srcData, DataObject destData) {
return copyObject(srcData, destData, null);
}
protected DataObject cacheSnapshotChain(SnapshotInfo snapshot, Scope scope) {
DataObject leafData = null;
DataStore store = cacheMgr.getCacheStorage(snapshot, scope);
while (snapshot != null) {
DataObject cacheData = cacheMgr.createCacheObject(snapshot, store);
if (leafData == null) {
leafData = cacheData;
}
snapshot = snapshot.getParent();
}
return leafData;
}
protected void deleteSnapshotCacheChain(SnapshotInfo snapshot) {
while (snapshot != null) {
cacheMgr.deleteCacheObject(snapshot);
snapshot = snapshot.getParent();
}
}
protected void releaseSnapshotCacheChain(SnapshotInfo snapshot) {
while (snapshot != null) {
cacheMgr.releaseCacheObject(snapshot);
snapshot = snapshot.getParent();
}
}
protected Answer copyVolumeFromSnapshot(DataObject snapObj, DataObject volObj) {
SnapshotInfo snapshot = (SnapshotInfo)snapObj;
StoragePool pool = (StoragePool)volObj.getDataStore();
String basicErrMsg = "Failed to create volume from " + snapshot.getName() + " on pool " + pool;
DataStore store = snapObj.getDataStore();
DataStoreTO storTO = store.getTO();
DataObject srcData = snapObj;
try {
if (!(storTO instanceof NfsTO)) {
// cache snapshot to zone-wide staging store for the volume to be created
srcData = cacheSnapshotChain(snapshot, new ZoneScope(pool.getDataCenterId()));
}
String value = configDao.getValue(Config.CreateVolumeFromSnapshotWait.toString());
int _createVolumeFromSnapshotWait = NumbersUtil.parseInt(value, Integer.parseInt(Config.CreateVolumeFromSnapshotWait.getDefaultValue()));
EndPoint ep = null;
if (srcData.getDataStore().getRole() == DataStoreRole.Primary) {
ep = selector.select(volObj);
} else {
ep = selector.select(srcData, volObj);
}
CopyCommand cmd = new CopyCommand(srcData.getTO(), addFullCloneFlagOnVMwareDest(volObj.getTO()), _createVolumeFromSnapshotWait, VirtualMachineManager.ExecuteInSequence.value());
Answer answer = null;
if (ep == null) {
String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
s_logger.error(errMsg);
answer = new Answer(cmd, false, errMsg);
} else {
answer = ep.sendMessage(cmd);
}
return answer;
} catch (Exception e) {
s_logger.error(basicErrMsg, e);
throw new CloudRuntimeException(basicErrMsg);
} finally {
if (!(storTO instanceof NfsTO)) {
// still keep snapshot on cache which may be migrated from previous secondary storage
releaseSnapshotCacheChain((SnapshotInfo)srcData);
}
}
}
protected Answer cloneVolume(DataObject template, DataObject volume) {
CopyCommand cmd = new CopyCommand(template.getTO(), addFullCloneFlagOnVMwareDest(volume.getTO()), 0, VirtualMachineManager.ExecuteInSequence.value());
try {
EndPoint ep = selector.select(volume.getDataStore());
Answer answer = null;
if (ep == null) {
String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
s_logger.error(errMsg);
answer = new Answer(cmd, false, errMsg);
} else {
answer = ep.sendMessage(cmd);
}
return answer;
} catch (Exception e) {
s_logger.debug("Failed to send to storage pool", e);
throw new CloudRuntimeException("Failed to send to storage pool", e);
}
}
protected Answer copyVolumeBetweenPools(DataObject srcData, DataObject destData) {
String value = configDao.getValue(Config.CopyVolumeWait.key());
int _copyvolumewait = NumbersUtil.parseInt(value, Integer.parseInt(Config.CopyVolumeWait.getDefaultValue()));
Scope destScope = getZoneScope(destData.getDataStore().getScope());
DataStore cacheStore = cacheMgr.getCacheStorage(destScope);
if (cacheStore == null) {
// need to find a nfs or cifs image store, assuming that can't copy volume
// directly to s3
ImageStoreEntity imageStore = (ImageStoreEntity)dataStoreMgr.getImageStore(destScope.getScopeId());
if (!imageStore.getProtocol().equalsIgnoreCase("nfs") && !imageStore.getProtocol().equalsIgnoreCase("cifs")) {
s_logger.debug("can't find a nfs (or cifs) image store to satisfy the need for a staging store");
return null;
}
DataObject objOnImageStore = imageStore.create(srcData);
objOnImageStore.processEvent(Event.CreateOnlyRequested);
Answer answer = copyObject(srcData, objOnImageStore);
if (answer == null || !answer.getResult()) {
if (answer != null) {
s_logger.debug("copy to image store failed: " + answer.getDetails());
}
objOnImageStore.processEvent(Event.OperationFailed);
imageStore.delete(objOnImageStore);
return answer;
}
objOnImageStore.processEvent(Event.OperationSuccessed, answer);
objOnImageStore.processEvent(Event.CopyingRequested);
CopyCommand cmd = new CopyCommand(objOnImageStore.getTO(), addFullCloneFlagOnVMwareDest(destData.getTO()), _copyvolumewait, VirtualMachineManager.ExecuteInSequence.value());
EndPoint ep = selector.select(objOnImageStore, destData);
if (ep == null) {
String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
s_logger.error(errMsg);
answer = new Answer(cmd, false, errMsg);
} else {
answer = ep.sendMessage(cmd);
}
if (answer == null || !answer.getResult()) {
if (answer != null) {
s_logger.debug("copy to primary store failed: " + answer.getDetails());
}
objOnImageStore.processEvent(Event.OperationFailed);
imageStore.delete(objOnImageStore);
return answer;
}
objOnImageStore.processEvent(Event.OperationSuccessed);
imageStore.delete(objOnImageStore);
return answer;
} else {
DataObject cacheData = cacheMgr.createCacheObject(srcData, destScope);
CopyCommand cmd = new CopyCommand(cacheData.getTO(), destData.getTO(), _copyvolumewait, VirtualMachineManager.ExecuteInSequence.value());
EndPoint ep = selector.select(cacheData, destData);
Answer answer = null;
if (ep == null) {
String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
s_logger.error(errMsg);
answer = new Answer(cmd, false, errMsg);
} else {
answer = ep.sendMessage(cmd);
}
// delete volume on cache store
if (cacheData != null) {
cacheMgr.deleteCacheObject(cacheData);
}
return answer;
}
}
protected Answer migrateVolumeToPool(DataObject srcData, DataObject destData) {
String value = configDao.getValue(Config.MigrateWait.key());
int waitInterval = NumbersUtil.parseInt(value, Integer.parseInt(Config.MigrateWait.getDefaultValue()));
VolumeInfo volume = (VolumeInfo)srcData;
StoragePool destPool = (StoragePool)dataStoreMgr.getDataStore(destData.getDataStore().getId(), DataStoreRole.Primary);
MigrateVolumeCommand command = new MigrateVolumeCommand(volume.getId(), volume.getPath(), destPool, volume.getAttachedVmName(), volume.getVolumeType(), waitInterval);
EndPoint ep = selector.select(srcData, StorageAction.MIGRATEVOLUME);
Answer answer = null;
if (ep == null) {
String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
s_logger.error(errMsg);
answer = new Answer(command, false, errMsg);
} else {
answer = ep.sendMessage(command);
}
if (answer == null || !answer.getResult()) {
throw new CloudRuntimeException("Failed to migrate volume " + volume + " to storage pool " + destPool);
} else {
// Update the volume details after migration.
VolumeVO volumeVo = volDao.findById(volume.getId());
Long oldPoolId = volume.getPoolId();
volumeVo.setPath(((MigrateVolumeAnswer)answer).getVolumePath());
String chainInfo = ((MigrateVolumeAnswer)answer).getVolumeChainInfo();
if (chainInfo != null) {
volumeVo.setChainInfo(chainInfo);
}
volumeVo.setPodId(destPool.getPodId());
volumeVo.setPoolId(destPool.getId());
volumeVo.setLastPoolId(oldPoolId);
// For SMB, pool credentials are also stored in the uri query string. We trim the query string
// part here to make sure the credentials do not get stored in the db unencrypted.
String folder = destPool.getPath();
if (destPool.getPoolType() == StoragePoolType.SMB && folder != null && folder.contains("?")) {
folder = folder.substring(0, folder.indexOf("?"));
}
volumeVo.setFolder(folder);
volDao.update(volume.getId(), volumeVo);
}
return answer;
}
// Note: destHost is currently only used if the copyObject method is invoked
@Override
public void copyAsync(DataObject srcData, DataObject destData, Host destHost, AsyncCompletionCallback<CopyCommandResult> callback) {
Answer answer = null;
String errMsg = null;
try {
s_logger.debug("copyAsync inspecting src type " + srcData.getType().toString() + " copyAsync inspecting dest type " + destData.getType().toString());
if (srcData.getType() == DataObjectType.SNAPSHOT && destData.getType() == DataObjectType.VOLUME) {
answer = copyVolumeFromSnapshot(srcData, destData);
} else if (srcData.getType() == DataObjectType.SNAPSHOT && destData.getType() == DataObjectType.TEMPLATE) {
answer = createTemplateFromSnapshot(srcData, destData);
} else if (srcData.getType() == DataObjectType.TEMPLATE && destData.getType() == DataObjectType.VOLUME) {
answer = cloneVolume(srcData, destData);
} else if (destData.getType() == DataObjectType.VOLUME && srcData.getType() == DataObjectType.VOLUME &&
srcData.getDataStore().getRole() == DataStoreRole.Primary && destData.getDataStore().getRole() == DataStoreRole.Primary) {
if (srcData.getId() == destData.getId()) {
// The volume has to be migrated across storage pools.
answer = migrateVolumeToPool(srcData, destData);
} else {
answer = copyVolumeBetweenPools(srcData, destData);
}
} else if (srcData.getType() == DataObjectType.SNAPSHOT && destData.getType() == DataObjectType.SNAPSHOT) {
answer = copySnapshot(srcData, destData);
} else {
answer = copyObject(srcData, destData, destHost);
}
if (answer != null && !answer.getResult()) {
errMsg = answer.getDetails();
}
} catch (Exception e) {
s_logger.debug("copy failed", e);
errMsg = e.toString();
}
CopyCommandResult result = new CopyCommandResult(null, answer);
result.setResult(errMsg);
callback.complete(result);
}
@DB
protected Answer createTemplateFromSnapshot(DataObject srcData, DataObject destData) {
String value = configDao.getValue(Config.CreatePrivateTemplateFromSnapshotWait.toString());
int _createprivatetemplatefromsnapshotwait = NumbersUtil.parseInt(value, Integer.parseInt(Config.CreatePrivateTemplateFromSnapshotWait.getDefaultValue()));
boolean needCache = false;
if (needCacheStorage(srcData, destData)) {
needCache = true;
SnapshotInfo snapshot = (SnapshotInfo) srcData;
srcData = cacheSnapshotChain(snapshot, snapshot.getDataStore().getScope());
}
EndPoint ep = null;
if (srcData.getDataStore().getRole() == DataStoreRole.Primary) {
ep = selector.select(destData);
} else {
ep = selector.select(srcData, destData);
}
CopyCommand cmd = new CopyCommand(srcData.getTO(), addFullCloneFlagOnVMwareDest(destData.getTO()), _createprivatetemplatefromsnapshotwait, VirtualMachineManager.ExecuteInSequence.value());
Answer answer = null;
if (ep == null) {
String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
s_logger.error(errMsg);
answer = new Answer(cmd, false, errMsg);
} else {
answer = ep.sendMessage(cmd);
}
// clean up snapshot copied to staging
if (needCache && srcData != null) {
cacheMgr.releaseCacheObject(srcData); // reduce ref count, but keep it there on cache which is converted from previous secondary storage
}
return answer;
}
protected Answer copySnapshot(DataObject srcData, DataObject destData) {
String value = configDao.getValue(Config.BackupSnapshotWait.toString());
int _backupsnapshotwait = NumbersUtil.parseInt(value, Integer.parseInt(Config.BackupSnapshotWait.getDefaultValue()));
DataObject cacheData = null;
SnapshotInfo snapshotInfo = (SnapshotInfo)srcData;
Object payload = snapshotInfo.getPayload();
Boolean fullSnapshot = true;
if (payload != null) {
fullSnapshot = (Boolean)payload;
}
Map<String, String> options = new HashMap<String, String>();
options.put("fullSnapshot", fullSnapshot.toString());
Answer answer = null;
try {
if (needCacheStorage(srcData, destData)) {
Scope selectedScope = pickCacheScopeForCopy(srcData, destData);
cacheData = cacheMgr.getCacheObject(srcData, selectedScope);
CopyCommand cmd = new CopyCommand(srcData.getTO(), addFullCloneFlagOnVMwareDest(destData.getTO()), _backupsnapshotwait, VirtualMachineManager.ExecuteInSequence.value());
cmd.setCacheTO(cacheData.getTO());
cmd.setOptions(options);
EndPoint ep = selector.select(srcData, destData);
if (ep == null) {
String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
s_logger.error(errMsg);
answer = new Answer(cmd, false, errMsg);
} else {
answer = ep.sendMessage(cmd);
}
} else {
addFullCloneFlagOnVMwareDest(destData.getTO());
CopyCommand cmd = new CopyCommand(srcData.getTO(), destData.getTO(), _backupsnapshotwait, VirtualMachineManager.ExecuteInSequence.value());
cmd.setOptions(options);
EndPoint ep = selector.select(srcData, destData, StorageAction.BACKUPSNAPSHOT);
if (ep == null) {
String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
s_logger.error(errMsg);
answer = new Answer(cmd, false, errMsg);
} else {
answer = ep.sendMessage(cmd);
}
}
// clean up cache entry
if (cacheData != null) {
cacheMgr.deleteCacheObject(cacheData);
}
return answer;
} catch (Exception e) {
s_logger.debug("copy snasphot failed: " + e.toString());
if (cacheData != null) {
cacheMgr.deleteCacheObject(cacheData);
}
throw new CloudRuntimeException(e.toString());
}
}
@Override
public void copyAsync(Map<VolumeInfo, DataStore> volumeMap, VirtualMachineTO vmTo, Host srcHost, Host destHost, AsyncCompletionCallback<CopyCommandResult> callback) {
CopyCommandResult result = new CopyCommandResult(null, null);
result.setResult("Unsupported operation requested for copying data.");
callback.complete(result);
}
}