spa_export
if (!g_readonly && spa_export(g_pool, NULL, B_TRUE, B_FALSE) != 0) {
(void) spa_export(g_pool, NULL, B_TRUE, B_FALSE);
VERIFY3U(0, ==, spa_export(oldname, &config, B_FALSE, B_FALSE));
extern int spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
error = spa_export(zc->zc_name, NULL, force, hardforce);