1 files changed, 23 insertions, 3 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 68cee358d9a3..dd57f4896736 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1857,6 +1857,28 @@ static unsigned int ipv4_default_mtu(const struct dst_entry *dst)
         return mtu;
 }
 
+static void rt_init_metrics(struct rtable *rt, struct fib_info *fi)
+{
+        if (!(rt->fl.flags & FLOWI_FLAG_PRECOW_METRICS)) {
+        no_cow:
+                rt->fi = fi;
+                atomic_inc(&fi->fib_clntref);
+                dst_init_metrics(&rt->dst, fi->fib_metrics, true);
+        } else {
+                struct inet_peer *peer;
+
+                if (!rt->peer)
+                        rt_bind_peer(rt, 1);
+                peer = rt->peer;
+                if (!peer)
+                        goto no_cow;
+                if (inet_metrics_new(peer))
+                        memcpy(peer->metrics, fi->fib_metrics,
+                               sizeof(u32) * RTAX_MAX);
+                dst_init_metrics(&rt->dst, peer->metrics, false);
+        }
+}
+
 static void rt_set_nexthop(struct rtable *rt, struct fib_result *res, u32 itag)
 {
         struct dst_entry *dst = &rt->dst;
@@ -1866,9 +1888,7 @@ static void rt_set_nexthop(struct rtable *rt, struct fib_result *res, u32 itag)
                 if (FIB_RES_GW(*res) &&
                     FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
                         rt->rt_gateway = FIB_RES_GW(*res);
-                rt->fi = fi;
-                atomic_inc(&fi->fib_clntref);
-                dst_init_metrics(dst, fi->fib_metrics, true);
+                rt_init_metrics(rt, fi);
 #ifdef CONFIG_IP_ROUTE_CLASSID
                 dst->tclassid = FIB_RES_NH(*res).nh_tclassid;
 #endif