netfilter: don't pull include/linux/netfilter.h from netns headers

This pulls the full hook netfilter definitions from all those that include
net_namespace.h.

Instead let's just include the bare minimum required in the new
linux/netfilter_defs.h file, and use it from the netfilter netns header files.

I also needed to include in.h and in6.h from linux/netfilter.h otherwise we hit
this compilation error:

In file included from include/linux/netfilter_defs.h:4:0,
                 from include/net/netns/netfilter.h:4,
                 from include/net/net_namespace.h:22,
                 from include/linux/netdevice.h:43,
                 from net/netfilter/nfnetlink_queue_core.c:23:
include/uapi/linux/netfilter.h:76:17: error: field ‘in’ has incomplete type struct in_addr in;

And also explicit include linux/netfilter.h in several spots.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index f5ff5d156da8..00050dfd9f23 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -10,7 +10,8 @@
 #include <linux/wait.h>
 #include <linux/list.h>
 #include <linux/static_key.h>
-#include <uapi/linux/netfilter.h>
+#include <linux/netfilter_defs.h>
+
 #ifdef CONFIG_NETFILTER
 static inline int NF_DROP_GETERR(int verdict)
 {
@@ -38,9 +39,6 @@ static inline void nf_inet_addr_mask(const union nf_inet_addr *a1,
 
 int netfilter_init(void);
 
-/* Largest hook number + 1 */
-#define NF_MAX_HOOKS 8
-
 struct sk_buff;
 
 struct nf_hook_ops;