ipip/rtnl: add IFLA_IPTUN_PMTUDISC on dump

This parameter was missing in the dump.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 6 insertions, 1 deletions

diff --git a/include/uapi/linux/if_tunnel.h b/include/uapi/linux/if_tunnel.h
index f5ea6b7b651f..5ab0c8ddc2bc 100644
--- a/include/uapi/linux/if_tunnel.h
+++ b/include/uapi/linux/if_tunnel.h
@@ -48,6 +48,7 @@ enum {
         IFLA_IPTUN_FLOWINFO,
         IFLA_IPTUN_FLAGS,
         IFLA_IPTUN_PROTO,
+        IFLA_IPTUN_PMTUDISC,
         __IFLA_IPTUN_MAX,
 };
 #define IFLA_IPTUN_MAX  (__IFLA_IPTUN_MAX - 1)
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 4be88cc98957..1fc0ea4786b9 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -835,6 +835,8 @@ static size_t ipip_get_size(const struct net_device *dev)
                 nla_total_size(1) +
                 /* IFLA_IPTUN_TOS */
                 nla_total_size(1) +
+                /* IFLA_IPTUN_PMTUDISC */
+                nla_total_size(1) +
                 0;
 }
 
@@ -847,7 +849,9 @@ static int ipip_fill_info(struct sk_buff *skb, const struct net_device *dev)
             nla_put_be32(skb, IFLA_IPTUN_LOCAL, parm->iph.saddr) ||
             nla_put_be32(skb, IFLA_IPTUN_REMOTE, parm->iph.daddr) ||
             nla_put_u8(skb, IFLA_IPTUN_TTL, parm->iph.ttl) ||
-            nla_put_u8(skb, IFLA_IPTUN_TOS, parm->iph.tos))
+            nla_put_u8(skb, IFLA_IPTUN_TOS, parm->iph.tos) ||
+            nla_put_u8(skb, IFLA_IPTUN_PMTUDISC,
+                       !!(parm->iph.frag_off & htons(IP_DF))))
                 goto nla_put_failure;
         return 0;