Added support for cloning

src/driver/controller-synology/http/index.js

@@ -174,6 +174,23 @@ class SynologyHttpClient {
     }
   }
 
+  async GetLunByID(lun_id) {
+    const lun_list = {
+      api: "SYNO.Core.ISCSI.LUN",
+      version: "1",
+      method: "list",
+    };
+
+    let response = await this.do_request("GET", "entry.cgi", lun_list);
+    let lun = response.body.data.luns.find((i) => {
+      return i.lun_id == lun_id;
+    });
+
+    if (lun) {
+      return lun;
+    }
+  }
+
   async GetLunByName(name) {
     const lun_list = {
       api: "SYNO.Core.ISCSI.LUN",
@@ -464,6 +481,36 @@ class SynologyHttpClient {
       Object.assign({}, iscsi_lun_extend, { uuid: uuid, new_size: size })
     );
   }
+
+
+
+  async CreateClonedVolume(src_lun_uuid, dst_lun_name) {
+    const create_cloned_volume = {
+      api: "SYNO.Core.ISCSI.LUN",
+      version: 1,
+      method: "clone",
+      src_lun_uuid: JSON.stringify(src_lun_uuid), // src lun uuid
+      dst_lun_name: dst_lun_name, // dst lun name
+      is_same_pool: true, // always true? string?
+      clone_type: "democratic-csi", // check
+    }
+    return await this.do_request("GET", "entry.cgi", create_cloned_volume);
+  }
+
+  async CreateVolumeFromSnapshot(src_lun_uuid, snapshot_uuid, cloned_lun_name) {
+    const create_volume_from_snapshot = {
+      api: "SYNO.Core.ISCSI.LUN",
+      version: 1,
+      method: "clone_snapshot",
+      src_lun_uuid: src_lun_uuid, // src lun uuid, snapshot id?
+      snapshot_uuid: JSON.stringify(snapshot_uuid), // shaptop uuid
+      cloned_lun_name: cloned_lun_name, // cloned lun name
+      clone_type: "democratic-csi", // check
+    }
+    return await this.do_request("GET", "entry.cgi", create_volume_from_snapshot);
+  }
+
+
 }
 
 module.exports.SynologyHttpClient = SynologyHttpClient;

src/driver/controller-synology/index.js

@@ -280,14 +280,63 @@ class ControllerSynologyDriver extends CsiBaseDriver {
         let data;
         let target;
         let lun_mapping;
+        let lun_uuid;
+        let existingLun;
 
-        // create lun
-        data = Object.assign({}, driver.options.iscsi.lunAttributes, {
-          name: iscsiName,
-          location: driver.options.synology.volume,
-          size: capacity_bytes,
-        });
-        let lun_uuid = await httpClient.CreateLun(data);
+        if (volume_content_source) {
+          let src_lun_uuid;
+          let src_lun_id;
+          switch (volume_content_source.type) {
+            case "snapshot":
+              let parts = volume_content_source.snapshot.snapshot_id.split("/");
+              src_lun_id = parts[2];
+              let snapshot_uuid = parts[3];
+              let src_lun = await httpClient.GetLunByID(src_lun_id);
+              src_lun_uuid = src_lun.uuid;
+
+              existingLun = await httpClient.GetLunByName(iscsiName);
+              if (!existingLun) {
+                await httpClient.CreateVolumeFromSnapshot(
+                  src_lun_uuid,
+                  snapshot_uuid,
+                  iscsiName
+                );
+              }
+              break;
+            case "volume":
+              let srcLunName = driver.buildIscsiName(
+                volume_content_source.volume.volume_id
+              );
+              src_lun_uuid = await httpClient.GetLunUUIDByName(srcLunName);
+
+              existingLun = httpClient.GetLunByName(iscsiName);
+              if (!existingLun) {
+                await httpClient.CreateClonedVolume(src_lun_uuid, iscsiName);
+              }
+              break;
+            default:
+              throw new GrpcError(
+                grpc.status.INVALID_ARGUMENT,
+                `invalid volume_content_source type: ${volume_content_source.type}`
+              );
+              break;
+          }
+          // resize to requested amount
+
+          let lun = await httpClient.GetLunByName(iscsiName);
+          lun_uuid = lun.uuid;
+          if (lun.size < capacity_bytes) {
+            await httpClient.ExpandISCSILun(lun_uuid, capacity_bytes);
+          }
+        } else {
+          // create lun
+          data = Object.assign({}, driver.options.iscsi.lunAttributes, {
+            name: iscsiName,
+            location: driver.options.synology.volume,
+            size: capacity_bytes,
+          });
+          lun_uuid = await httpClient.CreateLun(data);
+        }
 
         // create target
         let iqn = driver.options.iscsi.baseiqn + iscsiName;
@@ -437,16 +486,16 @@ class ControllerSynologyDriver extends CsiBaseDriver {
               driver.options.api.lunDelete.settleMaxRetries || 6;
             let settleSeconds = driver.options.api.lunDelete.settleSeconds || 5;
             let waitTimeBetweenChecks = settleSeconds * 1000;
-  
+
             await sleep(waitTimeBetweenChecks);
             lun_uuid = await httpClient.GetLunUUIDByName(iscsiName);
-  
+
             while (currentCheck <= settleMaxRetries && lun_uuid) {
               currentCheck++;
               await sleep(waitTimeBetweenChecks);
               lun_uuid = await httpClient.GetLunUUIDByName(iscsiName);
             }
-  
+
             if (lun_uuid) {
               throw new GrpcError(
                 grpc.status.UNKNOWN,