[IPSEC]: Move flow construction into xfrm_dst_lookup

This patch moves the flow construction from the callers of
xfrm_dst_lookup into that function.  It also changes xfrm_dst_lookup
so that it takes an xfrm state as its argument instead of explicit
addresses.

This removes any address-specific logic from the callers of
xfrm_dst_lookup which is needed to correctly support inter-family
transforms.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 7 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 3434fdc7de37..d427343f527b 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -233,7 +233,8 @@ struct xfrm_policy_afinfo {
         unsigned short          family;
         struct dst_ops          *dst_ops;
         void                    (*garbage_collect)(void);
-        int                     (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl);
+        struct dst_entry        *(*dst_lookup)(int tos, xfrm_address_t *saddr,
+                                               xfrm_address_t *daddr);
         int                     (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr);
         struct dst_entry        *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy);
         int                     (*bundle_create)(struct xfrm_policy *policy, 
@@ -1079,7 +1080,6 @@ extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
 #ifdef CONFIG_XFRM
 extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
-extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family);
 #else
 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
 {
@@ -1092,13 +1092,9 @@ static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
         kfree_skb(skb);
         return 0;
 }
-
-static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family)
-{
-        return -EINVAL;
-} 
 #endif
 
+extern struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos);
 struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp);
 extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *);
 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);