netfilter: netns nf_conntrack: add netns boilerplate

One comment: #ifdefs around #include is necessary to overcome amazing compile
breakages in NOTRACK-in-netns patch (see below).

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

3 files changed, 22 insertions, 7 deletions

diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 6aaf64b5dede..ee79e9325891 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1006,7 +1006,7 @@ EXPORT_SYMBOL_GPL(nf_conntrack_flush);
 
 /* Mishearing the voices in his head, our hero wonders how he's
    supposed to kill the mall. */
-void nf_conntrack_cleanup(void)
+void nf_conntrack_cleanup(struct net *net)
 {
         rcu_assign_pointer(ip_ct_attach, NULL);
 
@@ -1120,7 +1120,7 @@ EXPORT_SYMBOL_GPL(nf_conntrack_set_hashsize);
 module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint,
                   &nf_conntrack_htable_size, 0600);
 
-int __init nf_conntrack_init(void)
+int nf_conntrack_init(struct net *net)
 {
         int max_factor = 8;
         int ret;
diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index 990fa12f2ee5..e6a79f2a7c53 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -537,7 +537,7 @@ static const struct file_operations exp_file_ops = {
 };
 #endif /* CONFIG_PROC_FS */
 
-static int __init exp_proc_init(void)
+static int exp_proc_init(void)
 {
 #ifdef CONFIG_PROC_FS
         struct proc_dir_entry *proc;
@@ -558,7 +558,7 @@ static void exp_proc_remove(void)
 
 module_param_named(expect_hashsize, nf_ct_expect_hsize, uint, 0600);
 
-int __init nf_conntrack_expect_init(void)
+int nf_conntrack_expect_init(void)
 {
         int err = -ENOMEM;
 
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 8509db14670b..81dec17196df 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -440,11 +440,26 @@ static void nf_conntrack_standalone_fini_sysctl(void)
 }
 #endif /* CONFIG_SYSCTL */
 
+static int nf_conntrack_net_init(struct net *net)
+{
+        return nf_conntrack_init(net);
+}
+
+static void nf_conntrack_net_exit(struct net *net)
+{
+        nf_conntrack_cleanup(net);
+}
+
+static struct pernet_operations nf_conntrack_net_ops = {
+        .init = nf_conntrack_net_init,
+        .exit = nf_conntrack_net_exit,
+};
+
 static int __init nf_conntrack_standalone_init(void)
 {
         int ret;
 
-        ret = nf_conntrack_init();
+        ret = register_pernet_subsys(&nf_conntrack_net_ops);
         if (ret < 0)
                 goto out;
         ret = nf_conntrack_standalone_init_proc();
@@ -458,7 +473,7 @@ static int __init nf_conntrack_standalone_init(void)
 out_sysctl:
         nf_conntrack_standalone_fini_proc();
 out_proc:
-        nf_conntrack_cleanup();
+        unregister_pernet_subsys(&nf_conntrack_net_ops);
 out:
         return ret;
 }
@@ -467,7 +482,7 @@ static void __exit nf_conntrack_standalone_fini(void)
 {
         nf_conntrack_standalone_fini_sysctl();
         nf_conntrack_standalone_fini_proc();
-        nf_conntrack_cleanup();
+        unregister_pernet_subsys(&nf_conntrack_net_ops);
 }
 
 module_init(nf_conntrack_standalone_init);