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, 14 insertions, 2 deletions

diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index a8eb43cf0c7e..708009be88b6 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -16,6 +16,9 @@
 #include <net/netns/ipv6.h>
 #include <net/netns/dccp.h>
 #include <net/netns/x_tables.h>
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+#include <net/netns/conntrack.h>
+#endif
 
 struct proc_dir_entry;
 struct net_device;
@@ -67,6 +70,9 @@ struct net {
 #endif
 #ifdef CONFIG_NETFILTER
         struct netns_xt         xt;
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+        struct netns_ct         ct;
+#endif
 #endif
         struct net_generic      *gen;
 };
diff --git a/include/net/netfilter/nf_conntrack_core.h b/include/net/netfilter/nf_conntrack_core.h
index 05760d6a706e..532aa200cbc9 100644
--- a/include/net/netfilter/nf_conntrack_core.h
+++ b/include/net/netfilter/nf_conntrack_core.h
@@ -24,8 +24,8 @@ extern unsigned int nf_conntrack_in(u_int8_t pf,
                                     unsigned int hooknum,
                                     struct sk_buff *skb);
 
-extern int nf_conntrack_init(void);
-extern void nf_conntrack_cleanup(void);
+extern int nf_conntrack_init(struct net *net);
+extern void nf_conntrack_cleanup(struct net *net);
 
 extern int nf_conntrack_proto_init(void);
 extern void nf_conntrack_proto_fini(void);
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
new file mode 100644
index 000000000000..82d80b834779
--- /dev/null
+++ b/include/net/netns/conntrack.h
@@ -0,0 +1,6 @@
+#ifndef __NETNS_CONNTRACK_H
+#define __NETNS_CONNTRACK_H
+
+struct netns_ct {
+};
+#endif