Function ztest_import

freebsd/contrib/openzfs/cmd/ztest/ztest.c:7165–7194

* Import a storage pool with the given name. */

 * Import a storage pool with the given name.
 */
static void
ztest_import(ztest_shared_t *zs)
{
	spa_t *spa;

	mutex_init(&ztest_vdev_lock, NULL, MUTEX_DEFAULT, NULL);
	mutex_init(&ztest_checkpoint_lock, NULL, MUTEX_DEFAULT, NULL);
	VERIFY0(pthread_rwlock_init(&ztest_name_lock, NULL));

	kernel_init(SPA_MODE_READ | SPA_MODE_WRITE);

	ztest_import_impl(zs);

	VERIFY0(spa_open(ztest_opts.zo_pool, &spa, FTAG));
	zs->zs_metaslab_sz =
	    1ULL << spa->spa_root_vdev->vdev_child[0]->vdev_ms_shift;
	spa_close(spa, FTAG);

	kernel_fini();

	if (!ztest_opts.zo_mmp_test) {
		ztest_run_zdb(ztest_opts.zo_pool);
		ztest_freeze();
		ztest_run_zdb(ztest_opts.zo_pool);
	}

	(void) pthread_rwlock_destroy(&ztest_name_lock);
	mutex_destroy(&ztest_vdev_lock);
	mutex_destroy(&ztest_checkpoint_lock);
}

/*
 * Kick off threads to run tests on all datasets in parallel.