nvme_ns_info_use
if (nvme_ns_info_use(ns, &val) && fmt != NULL) {
extern bool nvme_ns_info_use(nvme_ns_info_t *, uint64_t *);
if (nvme_ns_info_use(info, &val)) {
if (!ns_info_test_size(info, nvme_ns_info_use, idns->id_nuse, "use",