+ nf_queue_nf_hook_drop(net, &entry->ops);
+ /* other cpu might still process nfqueue verdict that used reg */
+ synchronize_net();
+ kfree(entry);
+}
+EXPORT_SYMBOL(nf_unregister_net_hook);
+
+int nf_register_net_hooks(struct net *net, const struct nf_hook_ops *reg,
+ unsigned int n)
+{
+ unsigned int i;
+ int err = 0;
+
+ for (i = 0; i < n; i++) {
+ err = nf_register_net_hook(net, ®[i]);
+ if (err)
+ goto err;
+ }
+ return err;
+
+err:
+ if (i > 0)
+ nf_unregister_net_hooks(net, reg, i);
+ return err;
+}
+EXPORT_SYMBOL(nf_register_net_hooks);
+
+void nf_unregister_net_hooks(struct net *net, const struct nf_hook_ops *reg,
+ unsigned int n)
+{
+ while (n-- > 0)
+ nf_unregister_net_hook(net, ®[n]);
+}
+EXPORT_SYMBOL(nf_unregister_net_hooks);
+
+static LIST_HEAD(nf_hook_list);
+
+int nf_register_hook(struct nf_hook_ops *reg)
+{
+ struct net *net, *last;
+ int ret;
+
+ rtnl_lock();
+ for_each_net(net) {
+ ret = nf_register_net_hook(net, reg);
+ if (ret && ret != -ENOENT)
+ goto rollback;
+ }
+ list_add_tail(®->list, &nf_hook_list);
+ rtnl_unlock();
+
+ return 0;
+rollback:
+ last = net;
+ for_each_net(net) {
+ if (net == last)
+ break;
+ nf_unregister_net_hook(net, reg);
+ }
+ rtnl_unlock();
+ return ret;
+}
+EXPORT_SYMBOL(nf_register_hook);
+
+void nf_unregister_hook(struct nf_hook_ops *reg)
+{
+ struct net *net;
+
+ rtnl_lock();
+ list_del(®->list);
+ for_each_net(net)
+ nf_unregister_net_hook(net, reg);
+ rtnl_unlock();