code: func (s *Server) ImageFsInfo(ctx context.Context, req *pb.ImageFsInfoRequest) (resp *pb.ImageFsInfoResponse, err error) {
  	const operation = "image_fs_info"
  	defer func() {
  		recordOperation(operation, time.Now())
  		recordError(operation, err)
  	}()
  
  	store := s.StorageImageServer().GetStore()
  	fsUsage, err := getStorageFsInfo(store)
  
  	if err != nil {
  		return nil, err
  	}
  
  	return &pb.ImageFsInfoResponse{
  		ImageFilesystems: []*pb.FilesystemUsage{fsUsage},
  	}, nil
  }
docs: // ImageFsInfo returns information of the filesystem that is used to store images.