Examples with Initiator com.emc.storageos.db.client.model.Initiator used on opensource projects

Example 21 with Initiator

use of com.emc.storageos.db.client.model.Initiator in project coprhd-controller by CoprHD.

the class VPlexUtil method partitionInitiatorsByVarray.

/**
 * Makes a map of varray to Initiator URIs showing which intiators can access the given varrays.
 *
 * @param dbClient -- DbClient
 * @param initiatorURIs -- A list of Initiator URIs
 * @param varrayURIs -- A list of potential varray URIs
 * @param storage -- StorageSystem of the Vplex
 * @return Map of Varray URI to List of Initiator URIs that can be mapped through the varray to the vplex
 */
public static Map<URI, List<URI>> partitionInitiatorsByVarray(DbClient dbClient, List<URI> initiatorURIs, List<URI> varrayURIs, StorageSystem storage) {
    Map<URI, List<URI>> varrayToInitiators = new HashMap<>();
    // Read the initiators and partition them by Network
    List<Initiator> initiators = dbClient.queryObject(Initiator.class, initiatorURIs);
    Map<NetworkLite, List<Initiator>> networkToInitiators = NetworkUtil.getInitiatorsByNetwork(initiators, dbClient);
    // contains this varray. If so, add all the Initiators in that Network to the varrayToInitiators map.
    for (URI varrayURI : varrayURIs) {
        for (NetworkLite network : networkToInitiators.keySet()) {
            if (network.getConnectedVirtualArrays().contains(varrayURI.toString())) {
                if (!varrayToInitiators.keySet().contains(varrayURI)) {
                    varrayToInitiators.put(varrayURI, new ArrayList<URI>());
                }
                for (Initiator initiator : networkToInitiators.get(network)) {
                    varrayToInitiators.get(varrayURI).add(initiator.getId());
                }
            }
        }
    }
    return varrayToInitiators;
}

Example 22 with Initiator

use of com.emc.storageos.db.client.model.Initiator in project coprhd-controller by CoprHD.

the class ControllerLockingUtil method getHostStorageLockKeys.

/**
 * Returns a list of lock keys for export of Hosts to StorageSystems.
 * This is constructed from a list of Initiators.
 * All the host URIs are collected from the Initiators.
 * If an Initiator does not have a host URI, its hostName is converted to a URI and used.
 * iF export type is Cluster, the clusters are looked up, and all hosts in the
 * cluster are used.
 * The keys are constructed from a concatenation of the host URI and the storage system URI.
 *
 * @param dbClient
 * @param type
 *            ExportGroup.ExportGroupType -- used to determine if cluster export
 * @param initiatorURIs
 *            -- set of Initiators to consider
 * @param storageURI
 *            -- URI of storage system
 *            (could be a Protection System or null in which case only host in key)
 * @return List<String> where each item in list is a lockKey
 */
public static List<String> getHostStorageLockKeys(DbClient dbClient, ExportGroup.ExportGroupType type, Collection<URI> initiatorURIs, URI storageURI) {
    String storageKey = getStorageKey(dbClient, storageURI);
    List<String> lockKeys = new ArrayList<String>();
    // Collect the needed hosts, which can be specified either by URI or string name.
    Set<URI> hostURIs = new HashSet<URI>();
    Set<String> hostNames = new HashSet<String>();
    for (URI initiatorURI : initiatorURIs) {
        Initiator initiator = dbClient.queryObject(Initiator.class, initiatorURI);
        if (initiator == null || initiator.getInactive()) {
            continue;
        }
        hostURIs.add(initiator.getHost());
        hostNames.add(initiator.getHostName());
    }
    // If the export is type cluster, we want to add ALL the hosts in the clusters.
    if (type.equals(ExportGroup.ExportGroupType.Cluster)) {
        Set<URI> clusterURIs = new HashSet<URI>();
        // First determine the clusters for each real host.
        for (URI hostURI : hostURIs) {
            Host host = dbClient.queryObject(Host.class, hostURI);
            if (host == null || host.getInactive()) {
                continue;
            }
            if (!NullColumnValueGetter.isNullURI(host.getCluster())) {
                clusterURIs.add(host.getCluster());
            }
        }
        // add those hosts if not already present.
        for (URI clusterURI : clusterURIs) {
            URIQueryResultList result = new URIQueryResultList();
            dbClient.queryByConstraint(ContainmentConstraint.Factory.getContainedObjectsConstraint(clusterURI, Host.class, "cluster"), result);
            Iterator<URI> iter = result.iterator();
            while (iter.hasNext()) {
                Host host = dbClient.queryObject(Host.class, iter.next());
                if (host == null || host.getInactive()) {
                    continue;
                }
                hostNames.add(host.getHostName());
            }
        }
    }
    // Now make a key for every host / storage pair
    for (String hostName : hostNames) {
        String key = hostName + DELIMITER + storageKey;
        key = key.replaceAll("\\s", "");
        if (!lockKeys.contains(key)) {
            lockKeys.add(key);
        }
    }
    log.info("Lock keys: " + lockKeys.toString());
    return lockKeys;
}

Example 23 with Initiator

use of com.emc.storageos.db.client.model.Initiator in project coprhd-controller by CoprHD.

the class ControllerLockingUtil method getStorageLockKeysForRecoverPoint.

/**
 * This method is only invoked by RecoverPoint controller at this point as RP systems are treated as clusters for
 * export,
 * but they do not have a real host object associated with each initiator.
 *
 * Returns a list of lock keys for export of Hosts to StorageSystems.
 * This is constructed from a list of Initiators.
 * All the host names are collected from the Initiators.
 * The keys are constructed from a concatenation of the host URI and the storage system URI.
 *
 * @param dbClient
 * @param initiatorURIs
 *            -- set of Initiators to consider
 * @param storageURI
 *            --
 *            (could be a Protection System or null in which case only host in key)
 * @return List<String> where each item in list is a lockKey
 */
public static List<String> getStorageLockKeysForRecoverPoint(DbClient dbClient, Collection<URI> initiatorURIs, URI storageURI) {
    String storageKey = getStorageKey(dbClient, storageURI);
    List<String> lockKeys = new ArrayList<String>();
    // Collect the needed hosts, which can be specified either by URI or string name.
    Set<String> hostNames = new HashSet<String>();
    for (URI initiatorURI : initiatorURIs) {
        Initiator initiator = dbClient.queryObject(Initiator.class, initiatorURI);
        if (initiator == null || initiator.getInactive()) {
            continue;
        }
        hostNames.add(initiator.getClusterName());
    }
    // Now make a key for every host / storage pair
    for (String hostName : hostNames) {
        String key = hostName + DELIMITER + storageKey;
        // remove any spaces as ZK has an issue with space in lockKeys
        key = key.replaceAll("\\s", "");
        if (!lockKeys.contains(key)) {
            lockKeys.add(key);
        }
    }
    log.info("Lock keys: " + lockKeys.toString());
    return lockKeys;
}

Example 24 with Initiator

use of com.emc.storageos.db.client.model.Initiator in project coprhd-controller by CoprHD.

the class AbstractBasicMaskingOrchestrator method exportGroupRemoveInitiators.

@Override
public void exportGroupRemoveInitiators(URI storageURI, URI exportGroupURI, List<URI> initiatorURIs, String token) throws Exception {
    ExportOrchestrationTask taskCompleter = null;
    try {
        BlockStorageDevice device = getDevice();
        taskCompleter = new ExportOrchestrationTask(exportGroupURI, token);
        StorageSystem storage = _dbClient.queryObject(StorageSystem.class, storageURI);
        ExportGroup exportGroup = _dbClient.queryObject(ExportGroup.class, exportGroupURI);
        StringBuffer errorMessage = new StringBuffer();
        logExportGroup(exportGroup, storageURI);
        // Set up workflow steps.
        Workflow workflow = _workflowService.getNewWorkflow(MaskingWorkflowEntryPoints.getInstance(), "exportGroupRemoveInitiators", true, token);
        Initiator firstInitiator = _dbClient.queryObject(Initiator.class, initiatorURIs.get(0));
        // No need to validate the orchestrator level validation for vplex/rp. Hence ignoring validation for vplex/rp initiators.
        boolean isValidationNeeded = validatorConfig.isValidationEnabled() && !VPlexControllerUtils.isVplexInitiator(firstInitiator, _dbClient) && !ExportUtils.checkIfInitiatorsForRP(Arrays.asList(firstInitiator));
        _log.info("Orchestration level validation needed : {}", isValidationNeeded);
        Map<String, URI> portNameToInitiatorURI = new HashMap<String, URI>();
        List<String> portNames = new ArrayList<String>();
        // Populate the port WWN/IQNs (portNames) and the
        // mapping of the WWN/IQNs to Initiator URIs
        processInitiators(exportGroup, initiatorURIs, portNames, portNameToInitiatorURI);
        // Populate a map of volumes on the storage device associated with this ExportGroup
        List<BlockObject> blockObjects = new ArrayList<BlockObject>();
        if (exportGroup.getVolumes() != null) {
            for (Map.Entry<String, String> entry : exportGroup.getVolumes().entrySet()) {
                URI boURI = URI.create(entry.getKey());
                BlockObject bo = BlockObject.fetch(_dbClient, boURI);
                if (bo.getStorageController().equals(storageURI)) {
                    blockObjects.add(bo);
                }
            }
        }
        List<String> initiatorNames = new ArrayList<String>();
        for (URI initiatorURI : initiatorURIs) {
            Initiator initiator = _dbClient.queryObject(Initiator.class, initiatorURI);
            String normalizedName = Initiator.normalizePort(initiator.getInitiatorPort());
            initiatorNames.add(normalizedName);
        }
        _log.info("Normalized initiator names :{}", initiatorNames);
        device.findExportMasks(storage, initiatorNames, false);
        Map<URI, Boolean> initiatorIsPartOfFullListFlags = flagInitiatorsThatArePartOfAFullList(exportGroup, initiatorURIs);
        boolean anyOperationsToDo = false;
        if (exportGroup != null && !ExportMaskUtils.getExportMasks(_dbClient, exportGroup).isEmpty()) {
            // There were some exports out there that already have some or all of the
            // initiators that we are attempting to remove. We need to only
            // remove the volumes that the user added to these masks
            Map<String, Set<URI>> matchingExportMaskURIs = getInitiatorToExportMaskMap(exportGroup);
            // This loop will determine a list of volumes to update per export mask
            Map<URI, List<URI>> existingMasksToRemoveInitiator = new HashMap<URI, List<URI>>();
            Map<URI, List<URI>> existingMasksToRemoveVolumes = new HashMap<URI, List<URI>>();
            for (Map.Entry<String, Set<URI>> entry : matchingExportMaskURIs.entrySet()) {
                URI initiatorURI = portNameToInitiatorURI.get(entry.getKey());
                if (initiatorURI == null || !initiatorURIs.contains(initiatorURI)) {
                    // Entry key points to an initiator that was not passed in the remove request
                    continue;
                }
                Initiator initiator = _dbClient.queryObject(Initiator.class, initiatorURI);
                // Get a list of the ExportMasks that were matched to the initiator
                // go through the initiators and figure out the proper intiator and volume ramifications
                // to the existing masks.
                List<URI> exportMaskURIs = new ArrayList<URI>();
                exportMaskURIs.addAll(entry.getValue());
                List<ExportMask> masks = _dbClient.queryObject(ExportMask.class, exportMaskURIs);
                _log.info(String.format("initiator %s masks {%s}", initiator.getInitiatorPort(), Joiner.on(',').join(exportMaskURIs)));
                for (ExportMask mask : masks) {
                    if (mask == null || mask.getInactive() || !mask.getStorageDevice().equals(storageURI)) {
                        continue;
                    }
                    mask = getDevice().refreshExportMask(storage, mask);
                    _log.info(String.format("mask %s has initiator %s", mask.getMaskName(), initiator.getInitiatorPort()));
                    // We cannot remove initiator if there are existing volumes in the mask.
                    if (!isValidationNeeded || !mask.hasAnyExistingVolumes()) {
                        /**
                         * If user asked to remove Host from Cluster
                         * 1. Check if the export mask is shared across other export Groups, if not remove the host.
                         * 2. If shared, check whether all the initiators of host is being asked to remove
                         * 3. If yes, check if atleast one of the other shared export Group is EXCLUSIVE
                         * 4. If yes, then remove the shared volumes
                         *
                         * In all other cases, remove the initiators.
                         */
                        List<ExportGroup> otherExportGroups = ExportUtils.getOtherExportGroups(exportGroup, mask, _dbClient);
                        if (!otherExportGroups.isEmpty() && initiatorIsPartOfFullListFlags.get(initiatorURI) && ExportUtils.exportMaskHasBothExclusiveAndSharedVolumes(exportGroup, otherExportGroups, mask)) {
                            if (!exportGroup.forInitiator()) {
                                List<URI> removeVolumesList = existingMasksToRemoveVolumes.get(mask.getId());
                                if (removeVolumesList == null) {
                                    removeVolumesList = new ArrayList<URI>();
                                    existingMasksToRemoveVolumes.put(mask.getId(), removeVolumesList);
                                }
                                for (String volumeIdStr : exportGroup.getVolumes().keySet()) {
                                    URI egVolumeID = URI.create(volumeIdStr);
                                    if (mask.getUserAddedVolumes().containsValue(volumeIdStr) && !removeVolumesList.contains(egVolumeID)) {
                                        removeVolumesList.add(egVolumeID);
                                    }
                                }
                            } else {
                                // Just a reminder to the world in the case where Initiator is used in this odd situation.
                                _log.info("Removing volumes from an Initiator type export group as part of an initiator removal is not supported.");
                            }
                        } else {
                            _log.info(String.format("We can remove initiator %s from mask %s", initiator.getInitiatorPort(), mask.getMaskName()));
                            List<URI> initiators = existingMasksToRemoveInitiator.get(mask.getId());
                            if (initiators == null) {
                                initiators = new ArrayList<URI>();
                                existingMasksToRemoveInitiator.put(mask.getId(), initiators);
                            }
                            if (!initiators.contains(initiator.getId())) {
                                initiators.add(initiator.getId());
                            }
                        }
                    } else {
                        errorMessage.append(String.format("Mask %s has existing volumes %s", mask.forDisplay(), Joiner.on(", ").join(mask.getExistingVolumes().keySet())));
                    }
                }
            }
            // At this point we have a mapping of masks to objects that we want to remove
            Set<URI> masksGettingRemoved = new HashSet<URI>();
            // In this loop we are trying to remove those initiators that exist
            // on a mask that ViPR created.
            Map<URI, String> stepMap = new HashMap<URI, String>();
            for (Map.Entry<URI, List<URI>> entry : existingMasksToRemoveInitiator.entrySet()) {
                ExportMask mask = _dbClient.queryObject(ExportMask.class, entry.getKey());
                List<URI> initiatorsToRemove = entry.getValue();
                Set<String> allInitiators = ExportUtils.getExportMaskAllInitiatorPorts(mask, _dbClient);
                List<Initiator> initiatorObjectsToRemove = _dbClient.queryObject(Initiator.class, initiatorsToRemove);
                List<String> initiatorPortNamesToRemove = new ArrayList<>(Collections2.transform(initiatorObjectsToRemove, CommonTransformerFunctions.fctnInitiatorToPortName()));
                allInitiators.removeAll(initiatorPortNamesToRemove);
                if (allInitiators.isEmpty()) {
                    masksGettingRemoved.add(mask.getId());
                    // For this case, we are attempting to remove all the
                    // initiators in the mask. This means that we will have to
                    // delete the
                    // exportGroup
                    _log.info(String.format("mask %s has removed all " + "initiators, we are going to delete the mask from the " + "array", mask.getMaskName()));
                    List<URI> maskVolumeURIs = ExportMaskUtils.getUserAddedVolumeURIs(mask);
                    List<URI> maskInitiatorURIs = Lists.newArrayList(Collections2.transform(ExportMaskUtils.getInitiatorsForExportMask(_dbClient, mask, null), CommonTransformerFunctions.fctnDataObjectToID()));
                    stepMap.put(entry.getKey(), generateDeviceSpecificDeleteWorkflow(workflow, null, exportGroup, mask, maskVolumeURIs, maskInitiatorURIs, storage));
                    anyOperationsToDo = true;
                } else {
                    _log.info(String.format("mask %s - going to remove the " + "following initiators %s", mask.getMaskName(), Joiner.on(',').join(initiatorsToRemove)));
                    Map<URI, List<URI>> maskToInitiatorsMap = new HashMap<URI, List<URI>>();
                    maskToInitiatorsMap.put(mask.getId(), initiatorsToRemove);
                    List<URI> maskVolumeURIs = ExportMaskUtils.getUserAddedVolumeURIs(mask);
                    stepMap.put(entry.getKey(), generateDeviceSpecificRemoveInitiatorsWorkflow(workflow, null, exportGroup, mask, storage, maskToInitiatorsMap, maskVolumeURIs, initiatorsToRemove, true));
                    anyOperationsToDo = true;
                }
            }
            // for the storage array and ExportGroup.
            for (Map.Entry<URI, List<URI>> entry : existingMasksToRemoveVolumes.entrySet()) {
                if (masksGettingRemoved.contains(entry.getKey())) {
                    _log.info("Mask {} is getting removed, no need to remove volumes from it", entry.getKey().toString());
                    continue;
                }
                ExportMask mask = _dbClient.queryObject(ExportMask.class, entry.getKey());
                List<URI> volumesToRemove = entry.getValue();
                List<URI> initiatorsToRemove = existingMasksToRemoveInitiator.get(mask.getId());
                if (initiatorsToRemove != null) {
                    List<URI> initiatorsInExportMask = ExportUtils.getExportMaskAllInitiators(mask, _dbClient);
                    initiatorsInExportMask.removeAll(initiatorsToRemove);
                    if (!initiatorsInExportMask.isEmpty()) {
                        // There are still some initiators in this ExportMask
                        _log.info(String.format("ExportMask %s would have remaining initiators {%s} that require access to {%s}. " + "Not going to remove any of the volumes", mask.getMaskName(), Joiner.on(',').join(initiatorsInExportMask), Joiner.on(',').join(volumesToRemove)));
                        continue;
                    }
                }
                Collection<String> volumesToRemoveURIStrings = Collections2.transform(volumesToRemove, CommonTransformerFunctions.FCTN_URI_TO_STRING);
                List<String> exportMaskVolumeURIStrings = new ArrayList<String>(mask.getVolumes().keySet());
                exportMaskVolumeURIStrings.removeAll(volumesToRemoveURIStrings);
                if (exportMaskVolumeURIStrings.isEmpty() && !mask.hasAnyExistingVolumes()) {
                    _log.info(String.format("All the volumes (%s) from mask %s will be removed, so will have to remove the whole mask", Joiner.on(",").join(volumesToRemove), mask.getMaskName()));
                    errorMessage.append(String.format("Mask %s will be removed from array. ", mask.forDisplay()));
                    List<URI> maskVolumeURIs = ExportMaskUtils.getUserAddedVolumeURIs(mask);
                    List<URI> maskInitiatorURIs = Lists.newArrayList(Collections2.transform(ExportMaskUtils.getInitiatorsForExportMask(_dbClient, mask, null), CommonTransformerFunctions.fctnDataObjectToID()));
                    generateDeviceSpecificDeleteWorkflow(workflow, null, exportGroup, mask, maskVolumeURIs, maskInitiatorURIs, storage);
                    anyOperationsToDo = true;
                } else {
                    // Null taskID is passed in because the generateExportMaskRemoveVolumesWorkflow will fill it in
                    ExportTaskCompleter completer = new ExportRemoveVolumesOnAdoptedMaskCompleter(exportGroupURI, mask.getId(), volumesToRemove, null);
                    _log.info(String.format("A subset of volumes will be removed from mask %s: %s. ", mask.getMaskName(), Joiner.on(",").join(volumesToRemove)));
                    List<? extends BlockObject> boList = BlockObject.fetchAll(_dbClient, volumesToRemove);
                    if (mask.hasAnyExistingInitiators()) {
                        errorMessage.append(String.format("A subset of volumes will be removed from mask %s: %s. This will affect the %s initiators", mask.getMaskName(), Joiner.on(", ").join(Collections2.transform(boList, CommonTransformerFunctions.fctnDataObjectToForDisplay())), mask.getExistingInitiators()));
                    }
                    List<URI> maskInitiatorURIs = Lists.newArrayList(Collections2.transform(ExportMaskUtils.getInitiatorsForExportMask(_dbClient, mask, null), CommonTransformerFunctions.fctnDataObjectToID()));
                    generateDeviceSpecificRemoveVolumesWorkflow(workflow, stepMap.get(entry.getKey()), exportGroup, mask, storage, volumesToRemove, maskInitiatorURIs, completer);
                    anyOperationsToDo = true;
                }
            }
        }
        if (errorMessage != null && !errorMessage.toString().isEmpty()) {
            _log.warn("Error Message {}", errorMessage);
        }
        if (isValidationNeeded && StringUtils.hasText(errorMessage)) {
            throw DeviceControllerException.exceptions.removeInitiatorValidationError(Joiner.on(", ").join(initiatorNames), storage.getLabel(), errorMessage.toString());
        }
        if (anyOperationsToDo) {
            String successMessage = String.format("Successfully removed exports for initiators on StorageArray %s", storage.getLabel());
            workflow.executePlan(taskCompleter, successMessage);
        } else {
            taskCompleter.ready(_dbClient);
        }
    } catch (Exception e) {
        _log.error("ExportGroup remove initiator Orchestration failed.", e);
        // TODO add service code here
        if (taskCompleter != null) {
            ServiceError serviceError = DeviceControllerException.errors.jobFailedMsg(e.getMessage(), e);
            taskCompleter.error(_dbClient, serviceError);
        }
    }
}

Example 25 with Initiator

use of com.emc.storageos.db.client.model.Initiator in project coprhd-controller by CoprHD.

the class AbstractBasicMaskingOrchestrator method exportGroupDelete.

@Override
public void exportGroupDelete(URI storageURI, URI exportGroupURI, String token) throws Exception {
    ExportOrchestrationTask taskCompleter = null;
    try {
        taskCompleter = new ExportOrchestrationTask(exportGroupURI, token);
        StorageSystem storage = _dbClient.queryObject(StorageSystem.class, storageURI);
        ExportGroup exportGroup = _dbClient.queryObject(ExportGroup.class, exportGroupURI);
        String previousStep = null;
        boolean someOperationDone = false;
        logExportGroup(exportGroup, storageURI);
        if (!ExportMaskUtils.getExportMasks(_dbClient, exportGroup).isEmpty() && !exportGroup.getInactive()) {
            // Set up workflow steps.
            Workflow workflow = _workflowService.getNewWorkflow(MaskingWorkflowEntryPoints.getInstance(), "exportGroupDelete", true, token);
            List<ExportMask> exportMasksToZoneDelete = new ArrayList<ExportMask>();
            List<ExportMask> exportMasksToZoneRemoveVolumes = new ArrayList<ExportMask>();
            Set<URI> volumesToZoneRemoveVolumes = new HashSet<URI>();
            List<ExportMask> exportMasks = ExportMaskUtils.getExportMasks(_dbClient, exportGroup);
            for (ExportMask exportMask : exportMasks) {
                taskCompleter.setMask(exportMask.getId());
                _log.info(String.format("Checking mask %s", exportMask.getMaskName()));
                if (!exportMask.getInactive() && exportMask.getStorageDevice().equals(storageURI)) {
                    exportMask = getDevice().refreshExportMask(storage, exportMask);
                    Collection<URI> volumeURIs = Collections2.transform(exportGroup.getVolumes().keySet(), CommonTransformerFunctions.FCTN_STRING_TO_URI);
                    // One way to know if we should delete the mask is if all of the volumes in the mask
                    // are represented in the export group.
                    boolean deleteEntireMask = removingLastExportMaskVolumes(exportMask, new ArrayList<>(volumeURIs));
                    _log.info("deleteEntireMask for {}? {}", exportMask.getId(), deleteEntireMask);
                    Set<URI> volumesToRemove = new HashSet<>();
                    if (exportGroup.getInitiators() != null && !exportGroup.getInitiators().isEmpty()) {
                        Set<String> egInitiators = new HashSet<String>(exportGroup.getInitiators());
                        for (String initiatorIdStr : egInitiators) {
                            Initiator initiator = _dbClient.queryObject(Initiator.class, URI.create(initiatorIdStr));
                            if (initiator == null) {
                                _log.warn("Found that initiator " + initiatorIdStr + " in the export group is no longer in the database, removing from the initiator list.");
                                exportGroup.removeInitiator(URI.create(initiatorIdStr));
                                _dbClient.updateObject(exportGroup);
                                continue;
                            }
                            // Search for this initiator in another export group
                            List<ExportGroup> exportGroupList = ExportUtils.getInitiatorExportGroups(initiator, _dbClient);
                            // We cannot remove initiator from mask if the mask has existing volumes
                            if (exportMask.hasUserInitiator(URI.create(initiatorIdStr)) && !exportMask.hasAnyExistingVolumes()) {
                                // Best to just leave that initiator alone.
                                if ((exportGroupList != null && exportGroupList.size() > 1) && ExportUtils.isExportMaskShared(_dbClient, exportMask.getId(), null)) {
                                    _log.info(String.format("Found that my initiator is in %s more export groups, so we shouldn't remove it from the mask", exportGroupList.size() - 1));
                                    deleteEntireMask = false;
                                }
                            }
                        }
                    }
                    if (deleteEntireMask) {
                        _log.info(String.format("export_delete: export mask %s was either created by system or last volume is being removed.", exportMask.getMaskName()));
                        exportMasksToZoneDelete.add(exportMask);
                        someOperationDone = true;
                    } else {
                        // Volume removal -- check to see if that volume is already in another export group with that initiator.
                        for (String volumeIdStr : exportGroup.getVolumes().keySet()) {
                            URI egVolumeID = URI.create(volumeIdStr);
                            BlockObject bo = Volume.fetchExportMaskBlockObject(_dbClient, egVolumeID);
                            if (bo != null && exportMask.hasUserCreatedVolume(bo.getId())) {
                                if (exportGroup.getInitiators() != null) {
                                    for (String initiatorIdStr : exportGroup.getInitiators()) {
                                        if (exportMask.hasInitiator(initiatorIdStr)) {
                                            Initiator initiator = _dbClient.queryObject(Initiator.class, URI.create(initiatorIdStr));
                                            List<ExportGroup> exportGroupList2 = ExportUtils.getInitiatorVolumeExportGroups(initiator, egVolumeID, _dbClient);
                                            if (exportGroupList2 != null && exportGroupList2.size() > 1) {
                                                _log.info(String.format("Found that my volume %s is in another export group with this initiator %s, so we shouldn't remove it from the mask", volumeIdStr, initiator.getInitiatorPort()));
                                            } else {
                                                _log.info(String.format("We can remove volume %s from mask %s", volumeIdStr, exportMask.getMaskName()));
                                                volumesToRemove.add(egVolumeID);
                                            }
                                        } else if (exportMask.getCreatedBySystem()) {
                                            _log.info(String.format("Export Mask %s does not contain initiator %s, so we will not modify this export mask", exportMask.getId().toString(), initiatorIdStr));
                                        } else {
                                            // We're in a case where there are no user added initiators for this *existing* mask. So, we
                                            // should be able remove any
                                            // of the volumes that we added to the system.
                                            volumesToRemove.add(egVolumeID);
                                        }
                                    }
                                }
                            }
                        }
                        // Remove volume steps are generated based on the initiators we collected for removal.
                        if (!volumesToRemove.isEmpty()) {
                            _log.info(String.format("Mask %s, Removing volumes %s only", exportMask.getMaskName(), Joiner.on(',').join(volumesToRemove)));
                            _log.info(String.format("volumes in mask: %s", Joiner.on(',').join(exportMask.getVolumes().entrySet())));
                            exportMasksToZoneRemoveVolumes.add(exportMask);
                            volumesToZoneRemoveVolumes.addAll(volumesToRemove);
                            List<URI> maskInitiatorURIs = Lists.newArrayList(Collections2.transform(ExportMaskUtils.getInitiatorsForExportMask(_dbClient, exportMask, null), CommonTransformerFunctions.fctnDataObjectToID()));
                            previousStep = generateDeviceSpecificRemoveVolumesWorkflow(workflow, previousStep, exportGroup, exportMask, storage, new ArrayList<URI>(volumesToRemove), maskInitiatorURIs, null);
                            someOperationDone = true;
                        }
                    }
                }
            }
            if (!exportMasksToZoneDelete.isEmpty()) {
                for (ExportMask exportMask : exportMasksToZoneDelete) {
                    List<URI> volumeURIs = ExportMaskUtils.getUserAddedVolumeURIs(exportMask);
                    List<URI> maskInitiatorURIs = Lists.newArrayList(Collections2.transform(ExportMaskUtils.getInitiatorsForExportMask(_dbClient, exportMask, null), CommonTransformerFunctions.fctnDataObjectToID()));
                    previousStep = generateDeviceSpecificExportMaskDeleteWorkflow(workflow, previousStep, exportGroup, exportMask, volumeURIs, maskInitiatorURIs, storage);
                }
                // CTRL-8506 - VNX StorageGroup cannot be deleted because of a race condition with
                // the zoning. This is a live host test case. So, some initiators are still logged
                // in by the time ViPR tries to delete the StorageGroup.
                // General Solution:
                // When we have to delete ExportMask, we'll un-zone first so that any initiators
                // that are possibly logged into the array get a chance to log out. That way, there
                // should not be any problems with removing the ExportMask off the array.
                // 
                // COP-24183: Reversing the order with serialization to prevent DU if mask validation fails.
                previousStep = generateDeviceSpecificZoningDeleteWorkflow(workflow, previousStep, exportGroup, exportMasksToZoneDelete);
            }
            if (!exportMasksToZoneRemoveVolumes.isEmpty()) {
                // Remove all the indicated volumes from the indicated
                // export masks.
                generateDeviceSpecificZoningRemoveVolumesWorkflow(workflow, previousStep, exportGroup, exportMasksToZoneRemoveVolumes, new ArrayList<URI>(volumesToZoneRemoveVolumes));
            }
            String successMessage = String.format("Successfully removed export on StorageArray %s", storage.getLabel());
            workflow.executePlan(taskCompleter, successMessage);
        }
        if (!someOperationDone) {
            taskCompleter.ready(_dbClient);
        }
    } catch (Exception ex) {
        _log.error("ExportGroup Orchestration failed.", ex);
        // TODO add service code here
        if (taskCompleter != null) {
            ServiceError serviceError = DeviceControllerException.errors.jobFailedMsg(ex.getMessage(), ex);
            taskCompleter.error(_dbClient, serviceError);
        }
    }
}