xfrm: Introduce xfrm_input_afinfo to access the the callbacks properly

IPv6 can be build as a module, so we need mechanism to access
the address family dependent callback functions properly.
Therefore we introduce xfrm_input_afinfo, similar to that
what we have for the address family dependent part of
policies and states.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

1 files changed, 11 insertions, 12 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index ce3d96f752fd..af13599b60a0 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -349,6 +349,16 @@ int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
 void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
 
+struct xfrm_input_afinfo {
+        unsigned int            family;
+        struct module           *owner;
+        int                     (*callback)(struct sk_buff *skb, u8 protocol,
+                                            int err);
+};
+
+int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo);
+int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo);
+
 void xfrm_state_delete_tunnel(struct xfrm_state *x);
 
 struct xfrm_type {
@@ -1392,6 +1402,7 @@ void xfrm4_init(void);
 int xfrm_state_init(struct net *net);
 void xfrm_state_fini(struct net *net);
 void xfrm4_state_init(void);
+void xfrm4_protocol_init(void);
 #ifdef CONFIG_XFRM
 int xfrm6_init(void);
 void xfrm6_fini(void);
@@ -1773,18 +1784,6 @@ static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
         return ret;
 }
 
-static inline int xfrm_rcv_cb(struct sk_buff *skb, unsigned int family,
-                              u8 protocol, int err)
-{
-        switch(family) {
-#ifdef CONFIG_INET
-        case AF_INET:
-                return xfrm4_rcv_cb(skb, protocol, err);
-#endif
-        }
-        return 0;
-}
-
 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
                                     unsigned int family)
 {