ip_dont_fragment() can accept const socket and dst
Signed-off-by: Eric Dumazet <[email protected]>
---
include/net/ip.h | 8 +++++---
1 file 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)));
}
--
2.6.0.rc2.230.g3dd15c0
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