Examples with ExportMaskValidationContext com.emc.storageos.volumecontroller.impl.validators.contexts.ExportMaskValidationContext used on opensource projects

Example 11 with ExportMaskValidationContext

use of com.emc.storageos.volumecontroller.impl.validators.contexts.ExportMaskValidationContext in project coprhd-controller by CoprHD.

the class XtremIOExportOperations method runLunMapDeletionAlgorithm.

private void runLunMapDeletionAlgorithm(StorageSystem storage, ExportMask exportMask, List<URI> volumes, List<Initiator> initiators, TaskCompleter taskCompleter) throws DeviceControllerException {
    // find LunMap associated with Volume
    // Then find initiatorGroup associated with this lun map
    // find initiators associated with IG, if the given list is of initiators is same, then run
    // removeLunMap
    XtremIOClient client = null;
    // Default_IG;
    try {
        String hostName = null;
        String clusterName = null;
        client = XtremIOProvUtils.getXtremIOClient(dbClient, storage, xtremioRestClientFactory);
        String xioClusterName = client.getClusterDetails(storage.getSerialNumber()).getName();
        for (Initiator initiator : initiators) {
            if (null != initiator.getHostName()) {
                // initiators already grouped by Host
                hostName = initiator.getHostName();
                clusterName = initiator.getClusterName();
                break;
            }
        }
        ArrayListMultimap<String, Initiator> groupInitiatorsByIG = XtremIOProvUtils.mapInitiatorToInitiatorGroup(storage.getSerialNumber(), initiators, null, xioClusterName, client);
        ExportMaskValidationContext ctx = new ExportMaskValidationContext();
        ctx.setStorage(storage);
        ctx.setExportMask(exportMask);
        ctx.setInitiators(initiators);
        ctx.setAllowExceptions(!WorkflowService.getInstance().isStepInRollbackState(taskCompleter.getOpId()));
        XtremIOExportMaskInitiatorsValidator initiatorsValidator = (XtremIOExportMaskInitiatorsValidator) validator.removeVolumes(ctx);
        initiatorsValidator.setInitiatorToIGMap(groupInitiatorsByIG);
        initiatorsValidator.validate();
        Set<String> igNames = groupInitiatorsByIG.keySet();
        List<String> failedVolumes = new ArrayList<String>();
        for (URI volumeUri : volumes) {
            BlockObject blockObj = BlockObject.fetch(dbClient, volumeUri);
            _log.info("Block Obj {} , wwn {}", blockObj.getId(), blockObj.getWWN());
            XtremIOVolume xtremIOVolume = null;
            if (URIUtil.isType(volumeUri, Volume.class)) {
                xtremIOVolume = XtremIOProvUtils.isVolumeAvailableInArray(client, blockObj.getDeviceLabel(), xioClusterName);
                // returned value is null, check the snapshots.
                if (xtremIOVolume == null) {
                    xtremIOVolume = XtremIOProvUtils.isSnapAvailableInArray(client, blockObj.getDeviceLabel(), xioClusterName);
                }
            } else {
                xtremIOVolume = XtremIOProvUtils.isSnapAvailableInArray(client, blockObj.getDeviceLabel(), xioClusterName);
            }
            if (null != xtremIOVolume) {
                // I need lun map id and igName
                // if iGName is available in the above group, then remove lunMap
                _log.info("Volume Details {}", xtremIOVolume.toString());
                _log.info("Volume lunMap details {}", xtremIOVolume.getLunMaps().toString());
                Set<String> lunMaps = new HashSet<String>();
                String volId = xtremIOVolume.getVolInfo().get(2);
                if (xtremIOVolume.getLunMaps().isEmpty()) {
                    // handle scenarios where volumes gets unexported already
                    _log.info("Volume  {} doesn't have any existing export available on Array, unexported already.", xtremIOVolume.toString());
                    exportMask.removeFromUserCreatedVolumes(blockObj);
                    exportMask.removeVolume(blockObj.getId());
                    continue;
                }
                for (List<Object> lunMapEntries : xtremIOVolume.getLunMaps()) {
                    @SuppressWarnings("unchecked") List<Object> igDetails = (List<Object>) lunMapEntries.get(0);
                    String igName = (String) igDetails.get(1);
                    // Ig details is actually transforming to A double by deofault, even though
                    // its modeled as List<String>
                    // hence this logic
                    Double IgIdDouble = (Double) igDetails.get(2);
                    String igId = String.valueOf(IgIdDouble.intValue());
                    _log.info("IG Name: {} Id: {} found in Lun Map", igName, igId);
                    if (!igNames.contains(igName)) {
                        _log.info("Volume is associated with IG {} which is not in the removal list requested, ignoring..", igName);
                        continue;
                    }
                    @SuppressWarnings("unchecked") List<Object> tgtGroupDetails = (List<Object>) lunMapEntries.get(1);
                    Double tgIdDouble = (Double) tgtGroupDetails.get(2);
                    String tgtid = String.valueOf(tgIdDouble.intValue());
                    String lunMapId = volId.concat(XtremIOConstants.UNDERSCORE).concat(igId).concat(XtremIOConstants.UNDERSCORE).concat(tgtid);
                    _log.info("LunMap Id {} Found associated with Volume {}", lunMapId, blockObj.getDeviceLabel());
                    lunMaps.add(lunMapId);
                }
                // there will be only one lun map always
                for (String lunMap : lunMaps) {
                    try {
                        client.deleteLunMap(lunMap, xioClusterName);
                    } catch (Exception e) {
                        failedVolumes.add(volumeUri.toString().concat(XtremIOConstants.DASH).concat(e.getMessage()));
                        _log.warn("Deletion of Lun Map {} failed}", lunMap, e);
                    }
                }
            } else {
                exportMask.removeFromUserCreatedVolumes(blockObj);
                exportMask.removeVolume(blockObj.getId());
            }
        }
        dbClient.updateObject(exportMask);
        if (!failedVolumes.isEmpty()) {
            String errMsg = "Export Operations failed for these volumes: ".concat(Joiner.on(", ").join(failedVolumes));
            ServiceError serviceError = DeviceControllerException.errors.jobFailedMsg(errMsg, null);
            taskCompleter.error(dbClient, serviceError);
            return;
        }
        // Clean IGs if empty
        deleteInitiatorGroup(groupInitiatorsByIG, client, xioClusterName);
        // delete IG Folder as well if IGs are empty
        deleteInitiatorGroupFolder(client, xioClusterName, clusterName, hostName, storage);
        taskCompleter.ready(dbClient);
    } catch (Exception e) {
        _log.error(String.format("Export Operations failed - maskName: %s", exportMask.getId().toString()), e);
        ServiceError serviceError = DeviceControllerException.errors.jobFailed(e);
        taskCompleter.error(dbClient, serviceError);
    }
}

Example 12 with ExportMaskValidationContext

use of com.emc.storageos.volumecontroller.impl.validators.contexts.ExportMaskValidationContext in project coprhd-controller by CoprHD.

the class HDSExportOperations method deleteExportMask.

@Override
public void deleteExportMask(StorageSystem storage, URI exportMaskURI, List<URI> volumeURIList, List<URI> targetURIList, List<Initiator> initiatorList, TaskCompleter taskCompleter) throws DeviceControllerException {
    log.info("{} deleteExportMask START...", storage.getSerialNumber());
    List<HostStorageDomain> hsdToDeleteList = new ArrayList<HostStorageDomain>();
    try {
        log.info("deleteExportMask: Export mask id: {}", exportMaskURI);
        if (volumeURIList != null) {
            log.info("deleteExportMask: volumes:  {}", Joiner.on(',').join(volumeURIList));
        }
        if (targetURIList != null) {
            log.info("deleteExportMask: assignments: {}", Joiner.on(',').join(targetURIList));
        }
        if (initiatorList != null) {
            log.info("deleteExportMask: initiators: {}", Joiner.on(',').join(initiatorList));
        }
        // Get the context from the task completer, in case this is a rollback.
        boolean isRollback = WorkflowService.getInstance().isStepInRollbackState(taskCompleter.getOpId());
        ExportMask exportMask = dbClient.queryObject(ExportMask.class, exportMaskURI);
        ExportMaskValidationContext ctx = new ExportMaskValidationContext();
        ctx.setStorage(storage);
        ctx.setExportMask(exportMask);
        ctx.setBlockObjects(volumeURIList, dbClient);
        ctx.setInitiators(initiatorList);
        // Allow exceptions to be thrown when not rolling back
        ctx.setAllowExceptions(!isRollback);
        AbstractHDSValidator deleteMaskValidator = (AbstractHDSValidator) validator.exportMaskDelete(ctx);
        deleteMaskValidator.validate();
        HDSApiClient hdsApiClient = hdsApiFactory.getClient(HDSUtils.getHDSServerManagementServerInfo(storage), storage.getSmisUserName(), storage.getSmisPassword());
        HDSApiExportManager exportMgr = hdsApiClient.getHDSApiExportManager();
        String systemObjectId = HDSUtils.getSystemObjectID(storage);
        StringSetMap deviceDataMap = exportMask.getDeviceDataMap();
        if (null != deviceDataMap && !deviceDataMap.isEmpty()) {
            Set<String> hsdObjectIdList = deviceDataMap.keySet();
            for (String hsdObjectIdFromDb : hsdObjectIdList) {
                HostStorageDomain hsdObj = exportMgr.getHostStorageDomain(systemObjectId, hsdObjectIdFromDb);
                if (null != hsdObj) {
                    hsdToDeleteList.add(hsdObj);
                }
            }
            if (!hsdToDeleteList.isEmpty()) {
                hdsApiClient.getHDSBatchApiExportManager().deleteBatchHostStorageDomains(systemObjectId, hsdToDeleteList, storage.getModel());
            }
            // By this time, we have removed all HSD's created in this mask.
            taskCompleter.ready(dbClient);
        } else {
            String message = String.format("ExportMask %s does not have a configured HSD's, " + "indicating that this export may not have been created " + "successfully. Marking the delete operation ready.", exportMaskURI.toString());
            log.info(message);
            taskCompleter.ready(dbClient);
            return;
        }
    } catch (Exception e) {
        log.error("Unexpected error: deleteExportMask failed.", e);
        ServiceError error = DeviceControllerErrors.hds.methodFailed("deleteExportMask", e.getMessage());
        taskCompleter.error(dbClient, error);
    }
    log.info("{} deleteExportMask END...", storage.getSerialNumber());
}

Example 13 with ExportMaskValidationContext

use of com.emc.storageos.volumecontroller.impl.validators.contexts.ExportMaskValidationContext in project coprhd-controller by CoprHD.

the class VnxExportOperations method removeInitiators.

/*
     * (non-Javadoc)
     *
     * @see
     * com.emc.storageos.volumecontroller.impl.smis.ExportMaskOperations#removeInitiator(com.emc.storageos.db.client.
     * model.StorageSystem, java.net.URI, java.util.List, java.util.List,
     * com.emc.storageos.volumecontroller.TaskCompleter)
     *
     */
@Override
public void removeInitiators(StorageSystem storage, URI exportMaskURI, List<URI> volumeURIList, List<Initiator> initiatorList, List<URI> targets, TaskCompleter taskCompleter) throws DeviceControllerException {
    _log.info("{} removeInitiators START...", storage.getSerialNumber());
    try {
        _log.info("removeInitiators: Export mask id: {}", exportMaskURI);
        if (volumeURIList != null) {
            _log.info("removeInitiators: volumes : {}", Joiner.on(',').join(volumeURIList));
        }
        _log.info("removeInitiators: initiators : {}", Joiner.on(',').join(initiatorList));
        if (targets != null) {
            _log.info("removeInitiators: targets : {}", Joiner.on(',').join(targets));
        }
        boolean isRollback = WorkflowService.getInstance().isStepInRollbackState(taskCompleter.getOpId());
        if (isRollback) {
            _log.info("Handling removeInitiators as a result of rollback");
            List<Initiator> addedInitiators = new ArrayList<Initiator>();
            // Get the context from the task completer as this is a rollback.
            ExportOperationContext context = (ExportOperationContext) WorkflowService.getInstance().loadStepData(taskCompleter.getOpId());
            if (context != null && context.getOperations() != null) {
                ListIterator li = context.getOperations().listIterator(context.getOperations().size());
                while (li.hasPrevious()) {
                    ExportOperationContextOperation operation = (ExportOperationContextOperation) li.previous();
                    if (operation != null && VnxExportOperationContext.OPERATION_ADD_INITIATORS_TO_STORAGE_GROUP.equals(operation.getOperation())) {
                        addedInitiators = (List<Initiator>) operation.getArgs().get(0);
                        _log.info("Removing initiators {} as part of rollback", Joiner.on(',').join(addedInitiators));
                    }
                }
            }
            initiatorList = addedInitiators;
            if (initiatorList == null || initiatorList.isEmpty()) {
                _log.info("There was no context found for add initiator. So there is nothing to rollback.");
                taskCompleter.ready(_dbClient);
                return;
            }
        }
        ExportMask exportMask = _dbClient.queryObject(ExportMask.class, exportMaskURI);
        ExportMaskValidationContext ctx = new ExportMaskValidationContext();
        ctx.setStorage(storage);
        ctx.setExportMask(exportMask);
        ctx.setBlockObjects(volumeURIList, _dbClient);
        ctx.setAllowExceptions(!isRollback);
        validator.removeInitiators(ctx).validate();
        deleteStorageHWIDs(storage, initiatorList);
        taskCompleter.ready(_dbClient);
    } catch (Exception e) {
        _log.error("Unexpected error: removeInitiators failed.", e);
        ServiceError error = DeviceControllerErrors.smis.methodFailed("removeInitiators", e.getMessage());
        taskCompleter.error(_dbClient, error);
    }
    _log.info("{} removeInitiators END...", storage.getSerialNumber());
}

Example 14 with ExportMaskValidationContext

use of com.emc.storageos.volumecontroller.impl.validators.contexts.ExportMaskValidationContext in project coprhd-controller by CoprHD.

the class VmaxExportOperations method removeVolumes.

@Override
public void removeVolumes(StorageSystem storage, URI exportMaskURI, List<URI> volumeURIList, List<Initiator> initiatorList, TaskCompleter taskCompleter) throws DeviceControllerException {
    _log.info("{} removeVolumes START...", storage.getSerialNumber());
    try {
        _log.info("removeVolumes: Export mask id: {}", exportMaskURI);
        _log.info("removeVolumes: volumes: {}", Joiner.on(',').join(volumeURIList));
        if (initiatorList != null) {
            _log.info("removeVolumes: impacted initiators: {}", Joiner.on(",").join(initiatorList));
        }
        List<? extends BlockObject> blockObjects = BlockObject.fetchAll(_dbClient, volumeURIList);
        ExportMask exportMask = _dbClient.queryObject(ExportMask.class, exportMaskURI);
        boolean isRollback = WorkflowService.getInstance().isStepInRollbackState(taskCompleter.getOpId());
        ExportMaskValidationContext ctx = new ExportMaskValidationContext();
        ctx.setStorage(storage);
        ctx.setExportMask(exportMask);
        ctx.setBlockObjects(blockObjects);
        ctx.setInitiators(initiatorList);
        // Allow exceptions to be thrown when not rolling back
        ctx.setAllowExceptions(!isRollback);
        validator.removeVolumes(ctx).validate();
        boolean isVmax3 = storage.checkIfVmax3();
        WBEMClient client = _helper.getConnection(storage).getCimClient();
        if (isRollback) {
            // Get the context from the task completer for this rollback step. The stepId in this case
            // will correspond to the rollback step and not the primary execution step. We don't know
            // the rollback stepId until execution time, therefore there will be no step data in the
            // database corresponding to this stepId. The underlying call to loadStepData will take care
            // of finding the founding step (execution) step for this rollback stepId, from which the
            // step data can be found.
            ExportOperationContext context = (ExportOperationContext) WorkflowService.getInstance().loadStepData(taskCompleter.getOpId());
            exportMaskRollback(storage, context, taskCompleter);
            taskCompleter.ready(_dbClient);
            return;
        } else {
            String maskingViewName = _helper.getExportMaskName(exportMaskURI);
            // Always get the Storage Group from masking View, rather than depending on the name to find out SG.
            String parentGroupName = _helper.getStorageGroupForGivenMaskingView(maskingViewName, storage);
            // Storage Group does not exist, no operation on array side
            if (null == parentGroupName) {
                taskCompleter.ready(_dbClient);
                return;
            }
            Map<String, List<URI>> volumesByGroup = _helper.groupVolumesBasedOnExistingGroups(storage, parentGroupName, volumeURIList);
            _log.info("Group Volumes by Storage Group size : {}", volumesByGroup.size());
            if (volumesByGroup.size() == 0) {
                _log.info("Could not find any groups to which the volumes to remove belong.");
                taskCompleter.ready(_dbClient);
                return;
            }
            /**
             * For each child Group bucket, remove the volumes from those bucket
             */
            for (Entry<String, List<URI>> volumeByGroupEntry : volumesByGroup.entrySet()) {
                String childGroupName = volumeByGroupEntry.getKey();
                volumeURIList = volumeByGroupEntry.getValue();
                _log.info("Processing Group {} with volumes {}", childGroupName, Joiner.on("\t").join(volumeURIList));
                /**
                 * Empty child Storage Groups cannot be associated with Fast Policy.
                 * hence, verify if storage group size is > 1, if not, then remove the
                 * child group from Fast Policy, and then proceed with removing the volume from group
                 */
                if (volumesByGroup.get(childGroupName) != null && volumesByGroup.get(childGroupName).size() == volumeURIList.size() && !_helper.isStorageGroupSizeGreaterThanGivenVolumes(childGroupName, storage, volumeURIList.size())) {
                    _log.info("Storage Group has no more than {} volumes", volumeURIList.size());
                    URI blockURI = volumeURIList.get(0);
                    BlockObject blockObj = BlockObject.fetch(_dbClient, blockURI);
                    CIMObjectPath maskingGroupPath = _cimPath.getMaskingGroupPath(storage, childGroupName, SmisCommandHelper.MASKING_GROUP_TYPE.SE_DeviceMaskingGroup);
                    String policyName = ControllerUtils.getAutoTieringPolicyName(blockObj.getId(), _dbClient);
                    if (!isVmax3 && !Constants.NONE.equalsIgnoreCase(policyName)) {
                        _log.info("Storage Group contains only 1 volume, hence this group will be disassociated from fast, as fast cannot be applied to empty group {}", childGroupName);
                        _helper.removeVolumeGroupFromPolicyAndLimitsAssociation(client, storage, maskingGroupPath);
                    }
                }
                Set<String> volumeDeviceIds = new HashSet<String>();
                // Flag to indicate whether or not we need to use the EMCForce flag on this operation.
                // We currently use this flag when dealing with RP Volumes as they are tagged for RP and the
                // operation on these volumes would fail otherwise.
                boolean forceFlag = false;
                for (URI volURI : volumeURIList) {
                    BlockObject bo = Volume.fetchExportMaskBlockObject(_dbClient, volURI);
                    volumeDeviceIds.add(bo.getNativeId());
                    // The force flag only needs to be set once
                    if (!forceFlag) {
                        forceFlag = ExportUtils.useEMCForceFlag(_dbClient, volURI);
                    }
                }
                List<CIMObjectPath> volumePaths = new ArrayList<CIMObjectPath>();
                // Determine if the volumes are associated with any phantom storage groups.
                // If so, we need to remove volumes from those storage groups and potentially remove them.
                removeVolumesFromPhantomStorageGroup(storage, client, exportMaskURI, volumeURIList, childGroupName, forceFlag);
                // Create a relatively empty completer associated with the export mask. We don't have the export
                // group
                // at this level, so there's nothing decent to attach the completer to anyway.
                String task = UUID.randomUUID().toString();
                ExportMaskVolumeToStorageGroupCompleter completer = new ExportMaskVolumeToStorageGroupCompleter(null, exportMaskURI, task);
                List<URI> volumesInSG = _helper.findVolumesInStorageGroup(storage, childGroupName, volumeURIList);
                if (volumesInSG != null && !volumesInSG.isEmpty()) {
                    CIMArgument[] inArgs = _helper.getRemoveVolumesFromMaskingGroupInputArguments(storage, childGroupName, volumesInSG, forceFlag);
                    CIMArgument[] outArgs = new CIMArgument[5];
                    // If any of the volumes being removed are tied to RecoverPoint, we need to be aware that there
                    // might be some lag in terminating the remote copy session between VMAX and RP. So we need to
                    // catch a specific exception in this case and wait/retry.
                    boolean containsRPVolume = false;
                    // RecoverPoint related.
                    for (URI boUri : volumesInSG) {
                        if (URIUtil.isType(boUri, Volume.class)) {
                            Volume volume = _dbClient.queryObject(Volume.class, boUri);
                            if (volume != null && (volume.checkForRp() || RPHelper.isAssociatedToAnyRpVplexTypes(volume, _dbClient))) {
                                // Determined that the volume is RP related
                                containsRPVolume = true;
                                break;
                            }
                        }
                    }
                    // Initialize the retry/attempt variables
                    int attempt = 0;
                    int retries = 1;
                    if (containsRPVolume) {
                        // If we are dealing with an RP volume, we need to set the retry count appropriately
                        retries = MAX_RP_RETRIES;
                    }
                    while (attempt++ <= retries) {
                        try {
                            _helper.invokeMethodSynchronously(storage, _cimPath.getControllerConfigSvcPath(storage), "RemoveMembers", inArgs, outArgs, new SmisMaskingViewRemoveVolumeJob(null, storage.getId(), volumePaths, parentGroupName, childGroupName, _cimPath, completer));
                            // If the invoke succeeds without exception, break out of the retry loop.
                            break;
                        } catch (SmisException se) {
                            if (attempt != retries && containsRPVolume && se.getMessage().contains(COPY_SESSION_ERROR)) {
                                // There is some delay in terminating the remote copy session between VMAX and
                                // RecoverPoint
                                // so we need to wait and retry.
                                _log.warn(String.format("Encountered exception during attempt %s/%s to remove volumes %s from export group.  Waiting %s milliseconds before trying again.  Error: %s", attempt, MAX_RP_RETRIES, volumesInSG.toString(), RP_WAIT_FOR_RETRY, se.getMessage()));
                                try {
                                    Thread.sleep(RP_WAIT_FOR_RETRY);
                                } catch (InterruptedException e1) {
                                    Thread.currentThread().interrupt();
                                }
                            } else {
                                // This is not RP related so just re-throw the exception instead of retrying.
                                throw se;
                            }
                        }
                    }
                    if (isVmax3) {
                        // we need to add volumes to parking storage group
                        URI blockObjectURI = volumeURIList.get(0);
                        String policyName = _helper.getVMAX3FastSettingForVolume(blockObjectURI, null);
                        addVolumesToParkingStorageGroup(storage, policyName, volumeDeviceIds);
                    }
                } else {
                    completer.ready(_dbClient);
                }
            }
            taskCompleter.ready(_dbClient);
        }
    } catch (Exception e) {
        _log.error(String.format("removeVolumes failed - maskName: %s", exportMaskURI.toString()), e);
        ServiceError serviceError = null;
        if (null != e.getMessage() && e.getMessage().contains("FAST association cannot have an empty storage group")) {
            serviceError = DeviceControllerException.errors.concurrentRemoveFromSGCausesEmptySG(e);
        } else {
            serviceError = DeviceControllerException.errors.jobFailed(e);
        }
        taskCompleter.error(_dbClient, serviceError);
    }
    _log.info("{} removeVolumes END...", storage.getSerialNumber());
}

Example 15 with ExportMaskValidationContext

use of com.emc.storageos.volumecontroller.impl.validators.contexts.ExportMaskValidationContext in project coprhd-controller by CoprHD.

the class VmaxExportOperations method deleteExportMask.

@Override
public void deleteExportMask(StorageSystem storage, URI exportMaskURI, List<URI> volumeURIList, List<URI> targetURIList, List<Initiator> initiatorList, TaskCompleter taskCompleter) throws DeviceControllerException {
    _log.info("{} deleteExportMask START...", storage.getSerialNumber());
    try {
        _log.info("Export mask id: {}", exportMaskURI);
        if (volumeURIList != null) {
            _log.info("deleteExportMask: volumes:  {}", Joiner.on(',').join(volumeURIList));
        }
        if (targetURIList != null) {
            _log.info("deleteExportMask: assignments: {}", Joiner.on(',').join(targetURIList));
        }
        if (initiatorList != null) {
            _log.info("deleteExportMask: initiators: {}", Joiner.on(',').join(initiatorList));
        }
        boolean isVmax3 = storage.checkIfVmax3();
        WBEMClient client = _helper.getConnection(storage).getCimClient();
        String maskingViewName = _helper.getExportMaskName(exportMaskURI);
        // Always get the Storage Group from masking View, rather than depending on the name to find out SG.
        String groupName = _helper.getStorageGroupForGivenMaskingView(maskingViewName, storage);
        /*
             * The idea is to remove orphaned child Groups, after deleting masking view. We're getting
             * the list of childGroups here because once we call deleteMaskingView, the parent group
             * will be automatically deleted.
             * 
             * Run Associator Names to get details of child Storage Groups ,and group them based on
             * Fast Policy.
             */
        Map<StorageGroupPolicyLimitsParam, List<String>> childGroupsByFast = new HashMap<StorageGroupPolicyLimitsParam, List<String>>();
        // if SGs are already removed from masking view manually, then skip this part
        if (null != groupName) {
            childGroupsByFast = _helper.groupStorageGroupsByAssociation(storage, groupName);
        } else {
            _log.info("Masking View {} doesn't have any SGs associated, probably removed manually from Array", maskingViewName);
            if (isVmax3) {
                // If we did not find the storage group associated with the masking view it could be
                // the case that were were unexporting volumes and successfully deleted the masking
                // but failed at some point thereafter, and now the operation is being retried. If
                // that is the case, then for VMAX3 we want to make sure that none of the volumes being
                // unexported are still in non parking storage groups. If we find such volume we remove
                // them and add them to the parking storage group.
                ExportMask exportMask = _dbClient.queryObject(ExportMask.class, exportMaskURI);
                if (exportMask == null) {
                    // If we can't find the mask, there is really no cleanup we can do.
                    _log.warn("ExportMask {} no longer exists", exportMaskURI);
                    taskCompleter.ready(_dbClient);
                    return;
                }
                // See if any of the mask's volumes are still in a non-parking storage group. Map the
                // volumes by group name.
                List<URI> volumeURIs = ExportMaskUtils.getVolumeURIs(exportMask);
                Map<String, List<URI>> volumesInNonParkingStorageGroup = _helper.getVolumesInNonParkingStorageGroup(storage, volumeURIs);
                if (!volumesInNonParkingStorageGroup.isEmpty()) {
                    Map<String, Set<String>> volumeDeviceIdsMap = new HashMap<>();
                    for (Entry<String, List<URI>> storageGroupEntry : volumesInNonParkingStorageGroup.entrySet()) {
                        String storageGroupName = storageGroupEntry.getKey();
                        List<URI> storageGroupVolumeURIs = storageGroupEntry.getValue();
                        // then just skip the volume, we cannot clean it up as we may impact other exports.
                        if (_helper.findStorageGroupsAssociatedWithMultipleParents(storage, storageGroupName) || _helper.findStorageGroupsAssociatedWithOtherMaskingViews(storage, storageGroupName)) {
                            _log.info("Storage group {} is associated with multiple paranets or other masking views", storageGroupName);
                            continue;
                        }
                        // Otherwise, remove the volumes from the storage group.
                        _log.info("Removing volumes {} from non parking storage group {}", storageGroupVolumeURIs, storageGroupName);
                        _helper.removeVolumesFromStorageGroup(storage, storageGroupName, storageGroupVolumeURIs, true);
                        // parking storage group.
                        for (URI storageGroupVolumeURI : storageGroupVolumeURIs) {
                            Volume storageGroupVolume = _dbClient.queryObject(Volume.class, storageGroupVolumeURI);
                            if (storageGroupVolume != null) {
                                String policyName = ControllerUtils.getAutoTieringPolicyName(storageGroupVolumeURI, _dbClient);
                                String policyKey = _helper.getVMAX3FastSettingForVolume(storageGroupVolumeURI, policyName);
                                if (volumeDeviceIdsMap.containsKey(policyKey)) {
                                    volumeDeviceIdsMap.get(policyKey).add(storageGroupVolume.getNativeId());
                                } else {
                                    Set<String> volumeDeviceIds = new HashSet<>();
                                    volumeDeviceIds.add(storageGroupVolume.getNativeId());
                                    volumeDeviceIdsMap.put(policyKey, volumeDeviceIds);
                                }
                            }
                        }
                    }
                    // Finally for each parking storage group policy, add the volumes associated parking storage group.
                    for (Entry<String, Set<String>> volumeDeviceIdsMapEntry : volumeDeviceIdsMap.entrySet()) {
                        _log.info("Adding volumes {} on system {} to parking storage group for policy {}", volumeDeviceIdsMapEntry.getValue(), storage.getNativeGuid(), volumeDeviceIdsMapEntry.getKey());
                        addVolumesToParkingStorageGroup(storage, volumeDeviceIdsMapEntry.getKey(), volumeDeviceIdsMapEntry.getValue());
                    }
                }
            }
            taskCompleter.ready(_dbClient);
            return;
        }
        /*
             * If a maskingView was created by other instance, can not delete it here during roll back. Hence,
             * set task as done.
             */
        if (taskCompleter instanceof RollbackExportGroupCreateCompleter) {
            /*
                 * The purpose of rollback is to delete the masking view created by this very ViPR instance as
                 * part of this workflow, and it should not delete masking view created externally or another ViPR
                 */
            // Get the context from the task completer, in case this is a rollback.
            ExportOperationContext context = (ExportOperationContext) WorkflowService.getInstance().loadStepData(taskCompleter.getOpId());
            if (context != null) {
                exportMaskRollback(storage, context, taskCompleter);
            }
        } else {
            ExportOperationContext context = (ExportOperationContext) WorkflowService.getInstance().loadStepData(taskCompleter.getOpId());
            ExportMask exportMask = _dbClient.queryObject(ExportMask.class, exportMaskURI);
            List<URI> volumeURIs = ExportMaskUtils.getVolumeURIs(exportMask);
            ExportMaskValidationContext ctx = new ExportMaskValidationContext();
            ctx.setStorage(storage);
            ctx.setExportMask(exportMask);
            ctx.setBlockObjects(volumeURIList, _dbClient);
            ctx.setInitiators(initiatorList);
            ctx.setAllowExceptions(context == null);
            validator.exportMaskDelete(ctx).validate();
            if (!deleteMaskingView(storage, exportMaskURI, childGroupsByFast, taskCompleter)) {
                // deleteMaskingView call. Simply return from here.
                return;
            }
            for (Map.Entry<StorageGroupPolicyLimitsParam, List<String>> entry : childGroupsByFast.entrySet()) {
                _log.info(String.format("Mask %s FAST Policy %s associated with %d Storage Group(s)", maskingViewName, entry.getKey(), entry.getValue().size()));
            }
            if (groupName != null) {
                _log.info("storage group name : {}", groupName);
                // delete the CSG explicitly (CTRL-9236)
                CIMObjectPath storageGroupPath = _cimPath.getMaskingGroupPath(storage, groupName, SmisCommandHelper.MASKING_GROUP_TYPE.SE_DeviceMaskingGroup);
                // check if the storage group is shared before delete it
                if (_helper.checkExists(storage, storageGroupPath, false, false) != null && _helper.checkMaskingGroupShared(storage, storageGroupPath, exportMask.getMaskName())) {
                    // if the storage group is shared, don't delete the storage group
                    _log.info("The Storage group {} is shared, so it will not be deleted", groupName);
                    taskCompleter.ready(_dbClient);
                    return;
                }
                if (_helper.isCascadedSG(storage, storageGroupPath)) {
                    _helper.deleteMaskingGroup(storage, groupName, SmisCommandHelper.MASKING_GROUP_TYPE.SE_DeviceMaskingGroup);
                }
                /**
                 * After successful deletion of masking view, try to remove the child Storage Groups ,which were
                 * part of cascaded
                 * Parent Group. If Fast Policy is not enabled, then those child groups can be removed.
                 * If Fast enabled, then try to find if this child Storage Group is associated with more than 1
                 * Parent Cascaded
                 * Group, if yes, then we cannot delete the child Storage Group.
                 */
                for (Entry<StorageGroupPolicyLimitsParam, List<String>> childGroupByFastEntry : childGroupsByFast.entrySet()) {
                    for (String childGroupName : childGroupByFastEntry.getValue()) {
                        _log.info("Processing Group {} deletion with Fast Policy {}", childGroupName, childGroupByFastEntry.getKey());
                        CIMObjectPath maskingGroupPath = _cimPath.getMaskingGroupPath(storage, childGroupName, SmisCommandHelper.MASKING_GROUP_TYPE.SE_DeviceMaskingGroup);
                        if (!_helper.isFastPolicy(childGroupByFastEntry.getKey().getAutoTierPolicyName())) {
                            /**
                             * Remove the volumes from any phantom storage group (CTRL-8217).
                             *
                             * Volumes part of Phantom Storage Group will be in Non-CSG Non-FAST Storage Group
                             */
                            if (!_helper.isCascadedSG(storage, maskingGroupPath)) {
                                // Get volumes which are part of this Storage Group
                                List<URI> volumesInSG = _helper.findVolumesInStorageGroup(storage, childGroupName, volumeURIs);
                                // Flag to indicate whether or not we need to use the EMCForce flag on this
                                // operation.
                                // We currently use this flag when dealing with RP Volumes as they are tagged for RP
                                // and the
                                // operation on these volumes would fail otherwise.
                                boolean forceFlag = false;
                                for (URI volURI : volumesInSG) {
                                    forceFlag = ExportUtils.useEMCForceFlag(_dbClient, volURI);
                                    if (forceFlag) {
                                        break;
                                    }
                                }
                                removeVolumesFromPhantomStorageGroup(storage, client, exportMaskURI, volumesInSG, childGroupName, forceFlag);
                            }
                            // Delete the Storage Group
                            _helper.deleteMaskingGroup(storage, childGroupName, SmisCommandHelper.MASKING_GROUP_TYPE.SE_DeviceMaskingGroup);
                        } else if (!_helper.findStorageGroupsAssociatedWithMultipleParents(storage, childGroupName) && !_helper.findStorageGroupsAssociatedWithOtherMaskingViews(storage, childGroupName)) {
                            // volumeDeviceIds and policyName are required in case of VMAX3 to add volumes back
                            // to parking to storage group.
                            Set<String> volumeDeviceIds = new HashSet<String>();
                            String policyName = childGroupByFastEntry.getKey().getAutoTierPolicyName();
                            if (isVmax3) {
                                volumeDeviceIds = _helper.getVolumeDeviceIdsFromStorageGroup(storage, childGroupName);
                            }
                            // holds the group, if yes, then we should not delete this group
                            if (!isVmax3) {
                                _log.debug("Removing Storage Group {} from Fast Policy {}", childGroupName, childGroupByFastEntry.getKey());
                                _helper.removeVolumeGroupFromPolicyAndLimitsAssociation(client, storage, maskingGroupPath);
                            }
                            _log.debug("Deleting Storage Group {}", childGroupName);
                            _helper.deleteMaskingGroup(storage, childGroupName, SmisCommandHelper.MASKING_GROUP_TYPE.SE_DeviceMaskingGroup);
                            if (isVmax3 && !volumeDeviceIds.isEmpty()) {
                                // We need to add volumes back to appropriate parking storage group.
                                addVolumesToParkingStorageGroup(storage, policyName, volumeDeviceIds);
                            }
                        } else {
                            _log.info("Storage Group {} is either having more than one parent Storage Group or its part of another existing masking view", childGroupName);
                            // set Host IO Limits on SG which we reseted before deleting MV
                            if (childGroupByFastEntry.getKey().isHostIOLimitIOPsSet()) {
                                _helper.updateHostIOLimitIOPs(client, maskingGroupPath, childGroupByFastEntry.getKey().getHostIOLimitIOPs());
                            }
                            if (childGroupByFastEntry.getKey().isHostIOLimitBandwidthSet()) {
                                _helper.updateHostIOLimitBandwidth(client, maskingGroupPath, childGroupByFastEntry.getKey().getHostIOLimitBandwidth());
                            }
                        }
                    }
                }
            }
        }
        taskCompleter.ready(_dbClient);
    } catch (Exception e) {
        _log.error(String.format("deleteExportMask failed - maskName: %s", exportMaskURI.toString()), e);
        ServiceError serviceError = DeviceControllerException.errors.jobFailed(e);
        taskCompleter.error(_dbClient, serviceError);
    }
    _log.info("{} deleteExportMask END...", storage.getSerialNumber());
}