+#ifdef CONFIG_SYSCTL
+static struct ctl_table ip6_frags_ctl_table[] = {
+ {
+ .ctl_name = NET_IPV6_IP6FRAG_HIGH_THRESH,
+ .procname = "ip6frag_high_thresh",
+ .data = &init_net.ipv6.frags.high_thresh,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_IPV6_IP6FRAG_LOW_THRESH,
+ .procname = "ip6frag_low_thresh",
+ .data = &init_net.ipv6.frags.low_thresh,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_IPV6_IP6FRAG_TIME,
+ .procname = "ip6frag_time",
+ .data = &init_net.ipv6.frags.timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_IPV6_IP6FRAG_SECRET_INTERVAL,
+ .procname = "ip6frag_secret_interval",
+ .data = &ip6_frags.secret_interval,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies
+ },
+ { }
+};
+
+static int ip6_frags_sysctl_register(struct net *net)
+{
+ struct ctl_table *table;
+ struct ctl_table_header *hdr;
+
+ table = ip6_frags_ctl_table;
+ if (net != &init_net) {
+ table = kmemdup(table, sizeof(ip6_frags_ctl_table), GFP_KERNEL);
+ if (table == NULL)
+ goto err_alloc;
+
+ table[0].data = &net->ipv6.frags.high_thresh;
+ table[1].data = &net->ipv6.frags.low_thresh;
+ table[2].data = &net->ipv6.frags.timeout;
+ table[3].mode &= ~0222;
+ }
+
+ hdr = register_net_sysctl_table(net, net_ipv6_ctl_path, table);
+ if (hdr == NULL)
+ goto err_reg;
+
+ net->ipv6.sysctl.frags_hdr = hdr;
+ return 0;
+
+err_reg:
+ if (net != &init_net)
+ kfree(table);
+err_alloc:
+ return -ENOMEM;
+}
+
+static void ip6_frags_sysctl_unregister(struct net *net)
+{
+ struct ctl_table *table;
+
+ table = net->ipv6.sysctl.frags_hdr->ctl_table_arg;
+ unregister_net_sysctl_table(net->ipv6.sysctl.frags_hdr);
+ kfree(table);
+}
+#else
+static inline int ip6_frags_sysctl_register(struct net *net)
+{
+ return 0;
+}
+
+static inline void ip6_frags_sysctl_unregister(struct net *net)
+{
+}
+#endif
+
+static int ipv6_frags_init_net(struct net *net)
+{
+ net->ipv6.frags.high_thresh = 256 * 1024;
+ net->ipv6.frags.low_thresh = 192 * 1024;
+ net->ipv6.frags.timeout = IPV6_FRAG_TIMEOUT;
+
+ inet_frags_init_net(&net->ipv6.frags);
+
+ return ip6_frags_sysctl_register(net);
+}
+
+static void ipv6_frags_exit_net(struct net *net)
+{
+ ip6_frags_sysctl_unregister(net);
+ inet_frags_exit_net(&net->ipv6.frags, &ip6_frags);
+}
+
+static struct pernet_operations ip6_frags_ops = {
+ .init = ipv6_frags_init_net,
+ .exit = ipv6_frags_exit_net,
+};
+
+int __init ipv6_frag_init(void)