zpool_enable_datasets
(void) zpool_enable_datasets(pool->uap_zhp, NULL, 0);
zpool_enable_datasets(zhp, mntopts, 0) != 0) {
zpool_enable_datasets(zhp, mntopts, 0) != 0) {
extern int zpool_enable_datasets(zpool_handle_t *, const char *, int);