ipt_unregister_table_pre_exit
void ipt_unregister_table_pre_exit(struct net *net, const char *name);
EXPORT_SYMBOL(ipt_unregister_table_pre_exit);
ipt_unregister_table_pre_exit(net, "filter");
ipt_unregister_table_pre_exit(net, "mangle");
ipt_unregister_table_pre_exit(net, "raw");
ipt_unregister_table_pre_exit(net, "security");