ZPOOL_CONFIG_REWIND_INFO
nvlist_lookup_nvlist(nv, ZPOOL_CONFIG_REWIND_INFO, &nv) != 0) {
nvlist_lookup_nvlist(nv, ZPOOL_CONFIG_REWIND_INFO, &nv) != 0 ||
fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO,