Can convert QCow2 to QCow2

virtweb_backend/src/utils/file_disks_utils.rs

@@ -192,6 +192,18 @@ impl DiskFileInfo {
                 cmd
             }
 
+            // Clone a QCow file, using qemu-image instead of cp might improve "sparsification" of
+            // file
+            (DiskFileFormat::QCow2 { .. }, DiskFileFormat::QCow2 { .. }) => {
+                let mut cmd = Command::new(constants::QEMU_IMAGE_PROGRAM);
+                cmd.arg("convert")
+                    .arg("-O")
+                    .arg("qcow2")
+                    .arg(&self.file_path)
+                    .arg(&temp_file);
+                cmd
+            }
+
             // Convert Raw to QCow2 file
             (DiskFileFormat::Raw { .. }, DiskFileFormat::QCow2 { .. }) => {
                 let mut cmd = Command::new(constants::QEMU_IMAGE_PROGRAM);