[PATCH 3.2 14/87] net: dst: provide accessor function to dst->xfrm

[Ben Hutchings]

3.2.53-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Vlad Yasevich <vyasevich@xxxxxxxxx>

[ Upstream commit e87b3998d795123b4139bc3f25490dd236f68212 ]

dst->xfrm is conditionally defined.  Provide accessor funtion that
is always available.

Signed-off-by: Vlad Yasevich <vyasevich@xxxxxxxxx>
Acked-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 include/net/dst.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/net/dst.h b/include/net/dst.h
index 16010d1..86ef78d 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -459,10 +459,22 @@ static inline struct dst_entry *xfrm_lookup(struct net *net,
 {
 	return dst_orig;
 } 
+
+static inline struct xfrm_state *dst_xfrm(const struct dst_entry *dst)
+{
+	return NULL;
+}
+
 #else
 extern struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
 				     const struct flowi *fl, struct sock *sk,
 				     int flags);
+
+/* skb attached with this dst needs transformation if dst->xfrm is valid */
+static inline struct xfrm_state *dst_xfrm(const struct dst_entry *dst)
+{
+	return dst->xfrm;
+}
 #endif
 
 #endif /* _NET_DST_H */

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