diff options
| -rw-r--r-- | include/net/ip.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index 9b9ca2839399..525dc0778926 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -282,10 +282,12 @@ int ip_decrease_ttl(struct iphdr *iph) } static inline -int ip_dont_fragment(struct sock *sk, struct dst_entry *dst) +int ip_dont_fragment(const struct sock *sk, const struct dst_entry *dst) { - return inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO || - (inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT && + u8 pmtudisc = READ_ONCE(inet_sk(sk)->pmtudisc); + + return pmtudisc == IP_PMTUDISC_DO || + (pmtudisc == IP_PMTUDISC_WANT && !(dst_metric_locked(dst, RTAX_MTU))); } |