Function sa_attr_register_sync

freebsd/contrib/openzfs/module/zfs/sa.c:1773–1804

}

static void
sa_attr_register_sync(sa_handle_t *hdl, dmu_tx_t *tx)
{
	uint64_t attr_value = 0;
	sa_os_t *sa = hdl->sa_os->os_sa;
	sa_attr_table_t *tb = sa->sa_attr_table;
	int i;

	mutex_enter(&sa->sa_lock);

	if (!sa->sa_need_attr_registration || sa->sa_master_obj == 0) {
		mutex_exit(&sa->sa_lock);
		return;
	}

	if (sa->sa_reg_attr_obj == 0) {
		sa->sa_reg_attr_obj = zap_create_link(hdl->sa_os,
		    DMU_OT_SA_ATTR_REGISTRATION,
		    sa->sa_master_obj, SA_REGISTRY, tx);
	}
	for (i = 0; i != sa->sa_num_attrs; i++) {
		if (sa->sa_attr_table[i].sa_registered)
			continue;
		ATTR_ENCODE(attr_value, tb[i].sa_attr, tb[i].sa_length,
		    tb[i].sa_byteswap);
		VERIFY(0 == zap_update(hdl->sa_os, sa->sa_reg_attr_obj,
		    tb[i].sa_name, 8, 1, &attr_value, tx));
		tb[i].sa_registered = B_TRUE;
	}
	sa->sa_need_attr_registration = B_FALSE;
	mutex_exit(&sa->sa_lock);
}

/*
 * Replace all attributes with attributes specified in template.