nf_register_net_hook
int nf_register_net_hook(struct net *net, const struct nf_hook_ops *ops);
EXPORT_SYMBOL(nf_register_net_hook);
err = nf_register_net_hook(net, ®[i]);
err = nf_register_net_hook(net, &link->hook_ops);
err = nf_register_net_hook(net, ops);
return nf_register_net_hook(net, &basechain->ops);
err = nf_register_net_hook(net, ops);
nf_register_net_hook(dev_net(dev), ops)) {