DM_NACCESSIBLE
*errp = nvlist_lookup_uint64(media_attrs, DM_NACCESSIBLE, &media_size);
if (nvlist_add_uint64(attrs, DM_NACCESSIBLE,
if (nvlist_add_uint64(attrs, DM_NACCESSIBLE,
attrs, DM_NACCESSIBLE, DATA_TYPE_UINT64, NULL);