oldVolumeAttachmentObj := old.(*storage.VolumeAttachment)
	errorList := validation.ValidateVolumeAttachment(newVolumeAttachmentObj)
	return append(errorList, validation.ValidateVolumeAttachmentUpdate(newVolumeAttachmentObj, oldVolumeAttachmentObj)...)
}

// WarningsOnUpdate returns warnings for the given update.

		allErrs = append(allErrs, field.TooLong(fldPath.Child("message"), e.Message, maxAttachedVolumeMetadataSize))
	}
	return allErrs
}

// ValidateVolumeAttachmentUpdate validates a VolumeAttachment.
func ValidateVolumeAttachmentUpdate(new, old *storage.VolumeAttachment) field.ErrorList {
	allErrs := ValidateVolumeAttachment(new)

	// Spec is read-only

		// test scenarios with PersistentVolumeName set
		volumeAttachment.Spec.Source.PersistentVolumeName = &volumeName
		old.Spec.Source.PersistentVolumeName = &volumeName
		if errs := ValidateVolumeAttachmentUpdate(&volumeAttachment, &old); len(errs) != 0 {
			t.Errorf("expected success: %+v", errs)
		}

		volumeAttachment.Spec.Source = storage.VolumeAttachmentSource{}