Function spa_sync_aux_dev

freebsd/contrib/openzfs/module/zfs/spa.c:8376–8420

}

static void
spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx,
    const char *config, const char *entry)
{
	nvlist_t *nvroot;
	nvlist_t **list;
	int i;

	if (!sav->sav_sync)
		return;

	/*
	 * Update the MOS nvlist describing the list of available devices.
	 * spa_validate_aux() will have already made sure this nvlist is
	 * valid and the vdevs are labeled appropriately.
	 */
	if (sav->sav_object == 0) {
		sav->sav_object = dmu_object_alloc(spa->spa_meta_objset,
		    DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE,
		    sizeof (uint64_t), tx);
		VERIFY(zap_update(spa->spa_meta_objset,
		    DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1,
		    &sav->sav_object, tx) == 0);
	}

	VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
	if (sav->sav_count == 0) {
		VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0);
	} else {
		list = kmem_alloc(sav->sav_count*sizeof (void *), KM_SLEEP);
		for (i = 0; i < sav->sav_count; i++)
			list[i] = vdev_config_generate(spa, sav->sav_vdevs[i],
			    B_FALSE, VDEV_CONFIG_L2CACHE);
		VERIFY(nvlist_add_nvlist_array(nvroot, config, list,
		    sav->sav_count) == 0);
		for (i = 0; i < sav->sav_count; i++)
			nvlist_free(list[i]);
		kmem_free(list, sav->sav_count * sizeof (void *));
	}

	spa_sync_nvlist(spa, sav->sav_object, nvroot, tx);
	nvlist_free(nvroot);

	sav->sav_sync = B_FALSE;
}

/*
 * Rebuild spa's all-vdev ZAP from the vdev ZAPs indicated in each vdev_t.