NetApp · rajiv-jain-netapp · Aug 21, 2026 · Aug 24, 2026 · Aug 25, 2026 · Aug 28, 2026
@@ -21,7 +21,9 @@
 
 import feign.QueryMap;
 import org.apache.cloudstack.storage.feign.model.ExportPolicy;
+import org.apache.cloudstack.storage.feign.model.FileCloneRequest;
 import org.apache.cloudstack.storage.feign.model.FileInfo;
+import org.apache.cloudstack.storage.feign.model.response.JobResponse;
 import org.apache.cloudstack.storage.feign.model.response.OntapResponse;
 import feign.Headers;
 import feign.Param;
@@ -58,6 +60,15 @@ void createFile(@Param("authHeader") String authHeader,
                     @Param("path") String filePath,
                     FileInfo file);
 
+    /**
+     * Creates a space-efficient clone of a file within a FlexVolume.
+     *
+     * <p>ONTAP REST: {@code POST /api/storage/file/clone}</p>
+     */
+    @RequestLine("POST /api/storage/file/clone")
+    @Headers({"Authorization: {authHeader}", "Content-Type: application/json"})
+    JobResponse cloneFile(@Param("authHeader") String authHeader, FileCloneRequest request);
+
     // Export Policy Operations
     @RequestLine("POST /api/protocols/nfs/export-policies")
     @Headers({"Authorization: {authHeader}"})

@@ -50,8 +50,8 @@ public interface SANFeignClient {
     @Headers({"Authorization: {authHeader}"})
     Lun getLunByUUID(@Param("authHeader") String authHeader, @Param("uuid") String uuid);
 
-    @RequestLine("PATCH /{uuid}")
-    @Headers({"Authorization: {authHeader}"})
+    @RequestLine("PATCH /api/storage/luns/{uuid}")
+    @Headers({"Authorization: {authHeader}", "Content-Type: application/json"})
     void updateLun(@Param("authHeader") String authHeader, @Param("uuid") String uuid, Lun lun);
 
     @RequestLine("DELETE /api/storage/luns/{uuid}")

@@ -0,0 +1,131 @@
+/*
+ * 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.feign.model;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Request body for the ONTAP file clone API.
+ *
+ * <p>ONTAP REST endpoint: {@code POST /api/storage/file/clone}</p>
+ *
+ * <p>Creates a space-efficient copy of a file. Source and destination paths are relative to the
+ * root of {@code volume}, and both must live in that same FlexVolume.</p>
+ */
+@JsonIgnoreProperties(ignoreUnknown = true)
+@JsonInclude(JsonInclude.Include.NON_NULL)
+public class FileCloneRequest {
+
+    @JsonProperty("volume")
+    private VolumeRef volume;
+
+    @JsonProperty("source_path")
+    private String sourcePath;
+
+    @JsonProperty("destination_path")
+    private String destinationPath;
+
+    @JsonProperty("overwrite_destination")
+    private Boolean overwriteDestination;
+
+    public FileCloneRequest() {
+    }
+
+    public FileCloneRequest(String flexVolUuid, String flexVolName, String sourcePath, String destinationPath) {
+        this.volume = new VolumeRef(flexVolUuid, flexVolName);
+        this.sourcePath = sourcePath;
+        this.destinationPath = destinationPath;
+    }
+
+    public VolumeRef getVolume() {
+        return volume;
+    }
+
+    public void setVolume(VolumeRef volume) {
+        this.volume = volume;
+    }
+
+    public String getSourcePath() {
+        return sourcePath;
+    }
+
+    public void setSourcePath(String sourcePath) {
+        this.sourcePath = sourcePath;
+    }
+
+    public String getDestinationPath() {
+        return destinationPath;
+    }
+
+    public void setDestinationPath(String destinationPath) {
+        this.destinationPath = destinationPath;
+    }
+
+    public Boolean getOverwriteDestination() {
+        return overwriteDestination;
+    }
+
+    public void setOverwriteDestination(Boolean overwriteDestination) {
+        this.overwriteDestination = overwriteDestination;
+    }
+
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    @JsonInclude(JsonInclude.Include.NON_NULL)
+    public static class VolumeRef {
+
+        @JsonProperty("uuid")
+        private String uuid;
+
+        @JsonProperty("name")
+        private String name;
+
+        public VolumeRef() {
+        }
+
+        public VolumeRef(String uuid, String name) {
+            this.uuid = uuid;
+            this.name = name;
+        }
+
+        public String getUuid() {
+            return uuid;
+        }
+
+        public void setUuid(String uuid) {
+            this.uuid = uuid;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "FileCloneRequest{volume=" + (volume != null ? volume.getUuid() : null)
+                + ", sourcePath=" + sourcePath
+                + ", destinationPath=" + destinationPath + "}";
+    }
+}
@@ -308,6 +308,7 @@ private String toIndentedString(Object o) {
     }
 
 
+    @JsonInclude(JsonInclude.Include.NON_NULL)
     public static class Clone {
         @JsonProperty("source")
         private Source source = null;
@@ -319,6 +320,7 @@ public void setSource(Source source) {
         }
     }
 
+    @JsonInclude(JsonInclude.Include.NON_NULL)
     public static class Source {
         @JsonProperty("name")
         private String name = null;

@@ -630,14 +630,28 @@ private boolean isIPv4Address(String address) {
     abstract public void deleteCloudStackVolume(CloudStackVolume cloudstackVolume);
 
     /**
-     * Method encapsulates the behavior based on the opted protocol in subclasses.
+     * Creates a space-efficient clone of an existing object inside the same FlexVolume.
      * it is going to mimic
      *     cloneLun       for iSCSI, FC protocols
      *     cloneFile      for NFS3.0 and NFS4.1 protocols
      *     cloneNameSpace for Nvme/TCP and Nvme/FC protocol
-     * @param cloudstackVolume the CloudStack volume to copy
+     *
+     * <p>ONTAP requires the source and the destination to live in the same FlexVolume, which
+     * holds because a CloudStack primary storage pool maps one-to-one onto a FlexVolume.</p>
+     *
+     * @param cloudstackVolume describes the clone to create; the source is carried in the
+     *                         protocol-specific clone reference (for SAN, {@code lun.clone.source})
+     * @return the created CloudStackVolume, populated with the backend identity of the clone
+     */
+    abstract public CloudStackVolume cloneCloudStackVolume(CloudStackVolume cloudstackVolume);
+
+    /**
+     * Grows an existing backend object to {@code sizeInBytes}.
+     *
+     * <p>Needed after cloning a cached template, because a clone inherits the size of its source
+     * while the service offering may ask for a larger disk.</p>
      */
-    abstract public void copyCloudStackVolume(CloudStackVolume cloudstackVolume);
+    abstract public void resizeCloudStackVolume(CloudStackVolume cloudstackVolume, long sizeInBytes);
 
     /**
      * Method encapsulates the behavior based on the opted protocol in subclasses.

@@ -32,10 +32,13 @@
 import org.apache.cloudstack.engine.subsystem.api.storage.EndPointSelector;
 import org.apache.cloudstack.storage.command.CreateObjectCommand;
 import org.apache.cloudstack.storage.command.DeleteCommand;
+import org.apache.cloudstack.storage.datastore.db.PrimaryDataStoreDao;
 import org.apache.cloudstack.storage.datastore.db.StoragePoolDetailsDao;
+import org.apache.cloudstack.storage.datastore.db.StoragePoolVO;
 import org.apache.cloudstack.storage.feign.model.CliSnapshotRestoreRequest;
 import org.apache.cloudstack.storage.feign.model.ExportPolicy;
 import org.apache.cloudstack.storage.feign.model.ExportRule;
+import org.apache.cloudstack.storage.feign.model.FileCloneRequest;
 import org.apache.cloudstack.storage.feign.model.FileInfo;
 import org.apache.cloudstack.storage.feign.model.Job;
 import org.apache.cloudstack.storage.feign.model.Nas;
@@ -53,6 +56,8 @@
 import org.apache.logging.log4j.Logger;
 
 import com.cloud.agent.api.Answer;
+import com.cloud.agent.api.storage.ResizeVolumeCommand;
+import com.cloud.agent.api.to.StorageFilerTO;
 import com.cloud.host.HostVO;
 import com.cloud.storage.Storage;
 import com.cloud.storage.VolumeVO;
@@ -66,6 +71,7 @@ public class UnifiedNASStrategy extends NASStrategy {
     @Inject private VolumeDao volumeDao;
     @Inject private EndPointSelector epSelector;
     @Inject private StoragePoolDetailsDao storagePoolDetailsDao;
+    @Inject private PrimaryDataStoreDao primaryDataStoreDao;
 
     public UnifiedNASStrategy(OntapStorage ontapStorage) {
         super(ontapStorage);
@@ -117,9 +123,103 @@ public void deleteCloudStackVolume(CloudStackVolume cloudstackVolume) {
         }
     }
 
+    /**
+     * Clones a file inside the FlexVolume using ONTAP's file clone API.
+     *
+     * <p>The source is taken from {@code file.path} and the destination from
+     * {@code destinationPath}, both relative to the root of the FlexVolume backing the pool.</p>
+     */
+    @Override
+    public CloudStackVolume cloneCloudStackVolume(CloudStackVolume cloudstackVolume) {
+        if (cloudstackVolume == null || cloudstackVolume.getFile() == null
+                || cloudstackVolume.getFile().getPath() == null || cloudstackVolume.getDestinationPath() == null) {
+            logger.error("cloneCloudStackVolume: File clone failed. Invalid request: {}", cloudstackVolume);
+            throw new CloudRuntimeException("Failed to clone file, invalid request");
+        }
+        if (cloudstackVolume.getDatastoreId() == null) {
+            throw new CloudRuntimeException("Failed to clone file, no datastore id in the request");
+        }
+
+        Map<String, String> details = storagePoolDetailsDao.listDetailsKeyPairs(Long.parseLong(cloudstackVolume.getDatastoreId()));
+        String flexVolUuid = details.get(OntapStorageConstants.VOLUME_UUID);
+        String flexVolName = details.get(OntapStorageConstants.VOLUME_NAME);
+        if (flexVolUuid == null || flexVolUuid.isEmpty()) {
+            throw new CloudRuntimeException("Failed to clone file, FlexVolume uuid is missing from pool details");
+        }
+        String sourcePath = cloudstackVolume.getFile().getPath();
+        String destinationPath = cloudstackVolume.getDestinationPath();
+
+        logger.info("cloneCloudStackVolume: Cloning file [{}] to [{}] in FlexVol [{}]", sourcePath, destinationPath, flexVolName);
+        try {
+            FileCloneRequest request = new FileCloneRequest(flexVolUuid, flexVolName, sourcePath, destinationPath);
+            JobResponse jobResponse = nasFeignClient.cloneFile(getAuthHeader(), request);
+            pollJobIfPresent(jobResponse, "clone file [" + sourcePath + "] to [" + destinationPath + "]");
+
+            updateCloudStackVolumeMetadata(cloudstackVolume.getDatastoreId(), cloudstackVolume.getVolumeInfo());
+
+            FileInfo clonedFile = new FileInfo();
+            clonedFile.setPath(destinationPath);
+
+            CloudStackVolume clonedCloudStackVolume = new CloudStackVolume();
+            clonedCloudStackVolume.setFile(clonedFile);
+            clonedCloudStackVolume.setDatastoreId(cloudstackVolume.getDatastoreId());
+            clonedCloudStackVolume.setVolumeInfo(cloudstackVolume.getVolumeInfo());
+            return clonedCloudStackVolume;
+        } catch (FeignException e) {
+            logger.error("FeignException occurred while cloning file [{}], Status: {}, Exception: {}",
+                    sourcePath, e.status(), e.getMessage());
+            throw new CloudRuntimeException("Failed to clone file: " + e.getMessage());
+        } catch (Exception e) {
+            logger.error("Exception occurred while cloning file [{}], Exception: {}", sourcePath, e.getMessage());
+            throw new CloudRuntimeException("Failed to clone file: " + e.getMessage());
+        }
+    }
+
+    /**
+     * Grows the cloned qcow2 to the requested size via a host-side {@code qemu-img resize}.
+     */
     @Override
-    public void copyCloudStackVolume(CloudStackVolume cloudstackVolume) {
+    public void resizeCloudStackVolume(CloudStackVolume cloudstackVolume, long sizeInBytes) {
+        if (cloudstackVolume == null || cloudstackVolume.getVolumeInfo() == null) {
+            logger.error("resizeCloudStackVolume: Resize failed. Invalid request: {}", cloudstackVolume);
+            throw new CloudRuntimeException("Failed to resize file, invalid request");
+        }
+        if (sizeInBytes <= 0) {
+            throw new CloudRuntimeException("Failed to resize file, invalid size " + sizeInBytes);
+        }
+
+        DataObject volumeInfo = cloudstackVolume.getVolumeInfo();
+        Answer answer = resizeVolumeOnKVMHost(volumeInfo, sizeInBytes);
+        if (answer == null || !answer.getResult()) {
+            String errMsg = answer != null ? answer.getDetails() : "Failed to resize qcow2 on KVM host";
+            logger.error("resizeCloudStackVolume: " + errMsg);
+            throw new CloudRuntimeException(errMsg);
+        }
+        logger.info("resizeCloudStackVolume: Resized volume [{}] to {} bytes", volumeInfo.getUuid(), sizeInBytes);
+    }
+
+    private Answer resizeVolumeOnKVMHost(DataObject volumeInfo, long sizeInBytes) {
+        VolumeObject volumeObject = (VolumeObject) volumeInfo;
+        VolumeVO volume = volumeDao.findById(volumeObject.getId());
+        if (volume == null) {
+            throw new CloudRuntimeException("Volume not found with id: " + volumeObject.getId());
+        }
+
+        StoragePoolVO storagePool = primaryDataStoreDao.findById(volume.getPoolId());
+        if (storagePool == null) {
+            throw new CloudRuntimeException("Storage Pool not found for id: " + volume.getPoolId());
+        }
 
+        ResizeVolumeCommand cmd = new ResizeVolumeCommand(volume.getPath(), new StorageFilerTO(storagePool),
+                volume.getSize(), sizeInBytes, false, null);
+        EndPoint ep = epSelector.select(volumeInfo);
+        if (ep == null) {
+            String errMsg = "No remote endpoint to send ResizeVolumeCommand, check if host is up";
+            logger.error(errMsg);
+            return new Answer(cmd, false, errMsg);
+        }
+        logger.info("resizeVolumeOnKVMHost: Sending command to endpoint: {}", ep.getHostAddr());
+        return ep.sendMessage(cmd);
     }
 
     @Override
@@ -544,6 +644,28 @@ private Answer deleteVolumeOnKVMHost(DataObject volumeInfo) {
         }
     }
 
+    /**
+     * Deletes a file from a FlexVolume, treating an already-absent file as success.
+     */
+    public void deleteFileByPath(String flexVolUuid, String filePath) {
+        logger.info("deleteFileByPath: Deleting file [{}] from FlexVol [{}]", filePath, flexVolUuid);
+        try {
+            nasFeignClient.deleteFile(getAuthHeader(), flexVolUuid, filePath);
+            logger.debug("deleteFileByPath: Deleted file [{}]", filePath);
+        } catch (FeignException e) {
+            if (e.status() == 404) {
+                logger.warn("deleteFileByPath: File [{}] does not exist (status 404), skipping deletion", filePath);
+                return;
+            }
+            logger.error("FeignException occurred while deleting file [{}], Status: {}, Exception: {}",
+                    filePath, e.status(), e.getMessage());
+            throw new CloudRuntimeException("Failed to delete file: " + e.getMessage());
+        } catch (Exception e) {
+            logger.error("Exception occurred while deleting file [{}], Exception: {}", filePath, e.getMessage());
+            throw new CloudRuntimeException("Failed to delete file: " + e.getMessage());
+        }
+    }
+
     private FileInfo getFile(String volumeUuid, String filePath) {
         logger.info("Get File: {} for volume: {}", filePath, volumeUuid);