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inet: constify ip_dont_fragment() arguments

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ip_dont_fragment() can accept const socket and dst

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-09-25 07:39:14 -07:00 committed by David S. Miller
parent 30d50c61df
commit 4e3f5d727d
1 changed files with 5 additions and 3 deletions
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8
include/net/ip.h
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@ -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)));
}