[NETFILTER]: nf_conntrack: clean up a few header files

- Remove declarations of non-existing variables and functions
- Move helper init/cleanup function declarations to nf_conntrack_helper.h
- Remove unneeded __nf_conntrack_attach declaration and make it static

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netfilter/nf_conntrack.h

@@ -223,8 +223,6 @@ extern void nf_conntrack_tcp_update(struct sk_buff *skb,
 /* Fake conntrack entry for untracked connections */
 extern struct nf_conn nf_conntrack_untracked;
 
-extern int nf_ct_no_defrag;
-
 /* Iterate over all conntracks: if iter returns true, it's deleted. */
 extern void
 nf_ct_iterate_cleanup(int (*iter)(struct nf_conn *i, void *data), void *data);
@@ -264,10 +262,5 @@ do {							\
 	local_bh_enable();				\
 } while (0)
 
-extern int
-nf_conntrack_register_cache(u_int32_t features, const char *name, size_t size);
-extern void
-nf_conntrack_unregister_cache(u_int32_t features);
-
 #endif /* __KERNEL__ */
 #endif /* _NF_CONNTRACK_H */

include/net/netfilter/nf_conntrack_core.h

@@ -30,16 +30,6 @@ extern void nf_conntrack_cleanup(void);
 extern int nf_conntrack_proto_init(void);
 extern void nf_conntrack_proto_fini(void);
 
-extern int nf_conntrack_helper_init(void);
-extern void nf_conntrack_helper_fini(void);
-
-struct nf_conntrack_l3proto;
-extern struct nf_conntrack_l3proto *nf_ct_find_l3proto(u_int16_t pf);
-/* Like above, but you already have conntrack read lock. */
-extern struct nf_conntrack_l3proto *__nf_ct_find_l3proto(u_int16_t l3proto);
-
-struct nf_conntrack_l4proto;
-
 extern int
 nf_ct_get_tuple(const struct sk_buff *skb,
 		unsigned int nhoff,
@@ -76,8 +66,6 @@ static inline int nf_conntrack_confirm(struct sk_buff *skb)
 	return ret;
 }
 
-extern void __nf_conntrack_attach(struct sk_buff *nskb, struct sk_buff *skb);
-
 int
 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
 	    struct nf_conntrack_l3proto *l3proto,

include/net/netfilter/nf_conntrack_helper.h

@@ -58,4 +58,8 @@ static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct)
 {
 	return nf_ct_ext_find(ct, NF_CT_EXT_HELPER);
 }
+
+extern int nf_conntrack_helper_init(void);
+extern void nf_conntrack_helper_fini(void);
+
 #endif /*_NF_CONNTRACK_HELPER_H*/