netdev - [PATCH v4 net 1/3] net: dst: provide accessor function to dst->xfrm

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Date:	Tue, 15 Oct 2013 22:01:29 -0400
From:	Vlad Yasevich <vyasevich@...il.com>
To:	netdev@...r.kernel.org
Cc:	linux-sctp@...r.kernel.org, fan.du@...driver.com,
	Vlad Yasevich <vyasevich@...il.com>
Subject: [PATCH v4 net 1/3] net: dst: provide accessor function to dst->xfrm

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

Signed-off-by: Vlad Yasevich <vyasevich@...il.com>
---
 include/net/dst.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/net/dst.h b/include/net/dst.h
index 3bc4865..3c4c944 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -479,10 +479,22 @@ 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 */
-- 
1.8.3.1

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