1 files changed, 19 insertions, 0 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index c7496663f99a..f06e968f1992 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -412,6 +412,25 @@ int fib6_add(struct fib6_node *root, struct fib6_info *rt,
 	     struct nl_info *info, struct netlink_ext_ack *extack);
 int fib6_del(struct fib6_info *rt, struct nl_info *info);
 
+static inline
+void rt6_get_prefsrc(const struct rt6_info *rt, struct in6_addr *addr)
+{
+	const struct fib6_info *from;
+
+	rcu_read_lock();
+
+	from = rcu_dereference(rt->from);
+	if (from) {
+		*addr = from->fib6_prefsrc.addr;
+	} else {
+		struct in6_addr in6_zero = {};
+
+		*addr = in6_zero;
+	}
+
+	rcu_read_unlock();
+}
+
 static inline struct net_device *fib6_info_nh_dev(const struct fib6_info *f6i)
 {
 	return f6i->fib6_nh.nh_dev;