[IPSEC]: Add xfrm_input_state helper
This patch adds the xfrm_input_state helper function which returns the
current xfrm state being processed on the input path given an sk_buff.
This is currently only used by xfrm_input but will be used by ESP upon
asynchronous resumption.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 503d0d2..fe881b6 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1317,4 +1317,9 @@
}
#endif
+static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
+{
+ return skb->sp->xvec[skb->sp->len - 1];
+}
+
#endif /* _NET_XFRM_H */
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 8b2b1b5..8624cbd 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -109,7 +109,7 @@
/* A negative encap_type indicates async resumption. */
if (encap_type < 0) {
async = 1;
- x = skb->sp->xvec[skb->sp->len - 1];
+ x = xfrm_input_state(skb);
seq = XFRM_SKB_CB(skb)->seq;
goto resume;
}