From b92cf4aab8e688b1bd501ac2ac4f1b5c99601e3b Mon Sep 17 00:00:00 2001
From: David Miller <davem@davemloft.net>
Date: Tue, 28 Nov 2017 15:40:22 -0500
Subject: net: Create and use new helper xfrm_dst_child().

Only IPSEC routes have a non-NULL dst->child pointer.  And IPSEC
routes are identified by a non-NULL dst->xfrm pointer.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/xfrm.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'include/net/xfrm.h')

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index dc28a98ce97c..4021b49a6ce3 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -994,6 +994,15 @@ struct xfrm_dst {
 	u32 path_cookie;
 };
 
+static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
+{
+#ifdef CONFIG_XFRM
+	if (dst->xfrm)
+		return dst->child;
+#endif
+	return NULL;
+}
+
 #ifdef CONFIG_XFRM
 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
 {
-- 
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