diff options
Diffstat (limited to 'include/net/route.h')
| -rw-r--r-- | include/net/route.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/net/route.h b/include/net/route.h index 2ea40c1b5e0..afdeeb5bec2 100644 --- a/include/net/route.h +++ b/include/net/route.h @@ -317,4 +317,12 @@ static inline int ip4_dst_hoplimit(const struct dst_entry *dst) return hoplimit; } +static inline int ip_skb_dst_mtu(struct sk_buff *skb) +{ + struct inet_sock *inet = skb->sk ? inet_sk(skb->sk) : NULL; + + return (inet && inet->pmtudisc == IP_PMTUDISC_PROBE) ? + skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb)); +} + #endif /* _ROUTE_H */ |