+#endif
+
+static __net_init int devinet_init_net(struct net *net)
+{
+ int err;
+ struct ipv4_devconf *all, *dflt;
+#ifdef CONFIG_SYSCTL
+ struct ctl_table *tbl = ctl_forward_entry;
+ struct ctl_table_header *forw_hdr;
+#endif
+
+ err = -ENOMEM;
+ all = &ipv4_devconf;
+ dflt = &ipv4_devconf_dflt;
+
+ if (net != &init_net) {
+ all = kmemdup(all, sizeof(ipv4_devconf), GFP_KERNEL);
+ if (all == NULL)
+ goto err_alloc_all;
+
+ dflt = kmemdup(dflt, sizeof(ipv4_devconf_dflt), GFP_KERNEL);
+ if (dflt == NULL)
+ goto err_alloc_dflt;
+
+#ifdef CONFIG_SYSCTL
+ tbl = kmemdup(tbl, sizeof(ctl_forward_entry), GFP_KERNEL);
+ if (tbl == NULL)
+ goto err_alloc_ctl;
+
+ tbl[0].data = &all->data[NET_IPV4_CONF_FORWARDING - 1];
+ tbl[0].extra1 = all;
+ tbl[0].extra2 = net;
+#endif
+ }
+
+#ifdef CONFIG_SYSCTL
+ err = __devinet_sysctl_register(net, "all",
+ NET_PROTO_CONF_ALL, all);
+ if (err < 0)
+ goto err_reg_all;
+
+ err = __devinet_sysctl_register(net, "default",
+ NET_PROTO_CONF_DEFAULT, dflt);
+ if (err < 0)
+ goto err_reg_dflt;
+
+ err = -ENOMEM;
+ forw_hdr = register_net_sysctl_table(net, net_ipv4_path, tbl);
+ if (forw_hdr == NULL)
+ goto err_reg_ctl;
+ net->ipv4.forw_hdr = forw_hdr;
+#endif
+
+ net->ipv4.devconf_all = all;
+ net->ipv4.devconf_dflt = dflt;
+ return 0;
+
+#ifdef CONFIG_SYSCTL
+err_reg_ctl:
+ __devinet_sysctl_unregister(dflt);
+err_reg_dflt:
+ __devinet_sysctl_unregister(all);
+err_reg_all:
+ if (tbl != ctl_forward_entry)
+ kfree(tbl);
+err_alloc_ctl:
+#endif
+ if (dflt != &ipv4_devconf_dflt)
+ kfree(dflt);
+err_alloc_dflt:
+ if (all != &ipv4_devconf)
+ kfree(all);
+err_alloc_all:
+ return err;
+}
+
+static __net_exit void devinet_exit_net(struct net *net)
+{
+#ifdef CONFIG_SYSCTL
+ struct ctl_table *tbl;
+
+ tbl = net->ipv4.forw_hdr->ctl_table_arg;
+ unregister_net_sysctl_table(net->ipv4.forw_hdr);
+ __devinet_sysctl_unregister(net->ipv4.devconf_dflt);
+ __devinet_sysctl_unregister(net->ipv4.devconf_all);
+ kfree(tbl);
+#endif
+ kfree(net->ipv4.devconf_dflt);
+ kfree(net->ipv4.devconf_all);
+}
+
+static __net_initdata struct pernet_operations devinet_ops = {
+ .init = devinet_init_net,
+ .exit = devinet_exit_net,
+};