+static __net_init int pppol2tp_init_net(struct net *net)
+{
+ struct pppol2tp_net *pn;
+ struct proc_dir_entry *pde;
+ int err;
+
+ pn = kzalloc(sizeof(*pn), GFP_KERNEL);
+ if (!pn)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&pn->pppol2tp_tunnel_list);
+ rwlock_init(&pn->pppol2tp_tunnel_list_lock);
+
+ err = net_assign_generic(net, pppol2tp_net_id, pn);
+ if (err)
+ goto out;
+
+ pde = proc_net_fops_create(net, "pppol2tp", S_IRUGO, &pppol2tp_proc_fops);
+#ifdef CONFIG_PROC_FS
+ if (!pde) {
+ err = -ENOMEM;
+ goto out;
+ }
+#endif
+
+ return 0;
+
+out:
+ kfree(pn);
+ return err;
+}
+
+static __net_exit void pppol2tp_exit_net(struct net *net)
+{
+ struct pppoe_net *pn;
+
+ proc_net_remove(net, "pppol2tp");
+ pn = net_generic(net, pppol2tp_net_id);
+ /*
+ * if someone has cached our net then
+ * further net_generic call will return NULL
+ */
+ net_assign_generic(net, pppol2tp_net_id, NULL);
+ kfree(pn);
+}
+
+static struct pernet_operations pppol2tp_net_ops = {
+ .init = pppol2tp_init_net,
+ .exit = pppol2tp_exit_net,
+};
+