ipv4: show pmtu in route list

Override the metrics with rt_pmtu

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 1 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 9f7ffbe201c9..d547f6fae20d 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2909,6 +2909,7 @@ static int rt_fill_info(struct net *net,
         struct nlmsghdr *nlh;
         unsigned long expires = 0;
         u32 error;
+        u32 metrics[RTAX_MAX];
 
         nlh = nlmsg_put(skb, pid, seq, event, sizeof(*r), flags);
         if (nlh == NULL)
@@ -2953,7 +2954,10 @@ static int rt_fill_info(struct net *net,
             nla_put_be32(skb, RTA_GATEWAY, rt->rt_gateway))
                 goto nla_put_failure;
 
-        if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0)
+        memcpy(metrics, dst_metrics_ptr(&rt->dst), sizeof(metrics));
+        if (rt->rt_pmtu)
+                metrics[RTAX_MTU - 1] = rt->rt_pmtu;
+        if (rtnetlink_put_metrics(skb, metrics) < 0)
                 goto nla_put_failure;
 
         if (rt->rt_mark &&