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-rw-r--r--include/net/route.h16
1 files changed, 12 insertions, 4 deletions
diff --git a/include/net/route.h b/include/net/route.h
index dd4ae0029fd8..f68c167280a7 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -313,12 +313,20 @@ static inline int ip4_dst_hoplimit(const struct dst_entry *dst)
return hoplimit;
}
-static inline int ip_skb_dst_mtu(struct sk_buff *skb)
+static inline bool ip_sk_accept_pmtu(const struct sock *sk)
{
- struct inet_sock *inet = skb->sk ? inet_sk(skb->sk) : NULL;
+ return inet_sk(sk)->pmtudisc != IP_PMTUDISC_INTERFACE;
+}
- return (inet && inet->pmtudisc == IP_PMTUDISC_PROBE) ?
- skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
+static inline bool ip_sk_use_pmtu(const struct sock *sk)
+{
+ return inet_sk(sk)->pmtudisc < IP_PMTUDISC_PROBE;
+}
+
+static inline int ip_skb_dst_mtu(const struct sk_buff *skb)
+{
+ return (!skb->sk || ip_sk_use_pmtu(skb->sk)) ?
+ dst_mtu(skb_dst(skb)) : skb_dst(skb)->dev->mtu;
}
#endif /* _ROUTE_H */

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