+__net_initdata struct ctl_path net_core_path[] = {
+ { .procname = "net", .ctl_name = CTL_NET, },
+ { .procname = "core", .ctl_name = NET_CORE, },
+ { },
+};
+
+static __net_init int sysctl_core_net_init(struct net *net)
+{
+ struct ctl_table *tbl;
+
+ net->core.sysctl_somaxconn = SOMAXCONN;
+
+ tbl = netns_core_table;
+ if (!net_eq(net, &init_net)) {
+ tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL);
+ if (tbl == NULL)
+ goto err_dup;
+
+ tbl[0].data = &net->core.sysctl_somaxconn;
+ }
+
+ net->core.sysctl_hdr = register_net_sysctl_table(net,
+ net_core_path, tbl);
+ if (net->core.sysctl_hdr == NULL)
+ goto err_reg;
+
+ return 0;
+
+err_reg:
+ if (tbl != netns_core_table)
+ kfree(tbl);
+err_dup:
+ return -ENOMEM;
+}
+
+static __net_exit void sysctl_core_net_exit(struct net *net)
+{
+ struct ctl_table *tbl;
+
+ tbl = net->core.sysctl_hdr->ctl_table_arg;
+ unregister_net_sysctl_table(net->core.sysctl_hdr);
+ BUG_ON(tbl == netns_core_table);
+ kfree(tbl);
+}
+
+static __net_initdata struct pernet_operations sysctl_core_ops = {
+ .init = sysctl_core_net_init,
+ .exit = sysctl_core_net_exit,
+};
+
+static __init int sysctl_core_init(void)
+{
+ static struct ctl_table empty[1];
+
+ register_sysctl_paths(net_core_path, empty);
+ register_net_sysctl_rotable(net_core_path, net_core_table);
+ return register_pernet_subsys(&sysctl_core_ops);
+}