diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/dccp/ipv4.c | 1 | ||||
| -rw-r--r-- | net/ipv4/ip_output.c | 8 | ||||
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 2 | ||||
| -rw-r--r-- | net/ipv4/route.c | 4 | ||||
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 1 |
5 files changed, 11 insertions, 5 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index 720c36225ed9..d9f65fc66db5 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -174,6 +174,7 @@ static inline void dccp_do_pmtu_discovery(struct sock *sk, mtu = dst_mtu(dst); if (inet->pmtudisc != IP_PMTUDISC_DONT && + ip_sk_accept_pmtu(sk) && inet_csk(sk)->icsk_pmtu_cookie > mtu) { dccp_sync_mss(sk, mtu); diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 51be64e18e32..912402752f2f 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -1037,7 +1037,6 @@ error: static int ip_setup_cork(struct sock *sk, struct inet_cork *cork, struct ipcm_cookie *ipc, struct rtable **rtp) { - struct inet_sock *inet = inet_sk(sk); struct ip_options_rcu *opt; struct rtable *rt; @@ -1063,8 +1062,8 @@ static int ip_setup_cork(struct sock *sk, struct inet_cork *cork, * We steal reference to this route, caller should not release it */ *rtp = NULL; - cork->fragsize = inet->pmtudisc == IP_PMTUDISC_PROBE ? - rt->dst.dev->mtu : dst_mtu(&rt->dst); + cork->fragsize = ip_sk_use_pmtu(sk) ? + dst_mtu(&rt->dst) : rt->dst.dev->mtu; cork->dst = &rt->dst; cork->length = 0; cork->ttl = ipc->ttl; @@ -1315,7 +1314,8 @@ struct sk_buff *__ip_make_skb(struct sock *sk, /* DF bit is set when we want to see DF on outgoing frames. * If local_df is set too, we still allow to fragment this frame * locally. */ - if (inet->pmtudisc >= IP_PMTUDISC_DO || + if (inet->pmtudisc == IP_PMTUDISC_DO || + inet->pmtudisc == IP_PMTUDISC_PROBE || (skb->len <= dst_mtu(&rt->dst) && ip_dont_fragment(sk, &rt->dst))) df = htons(IP_DF); diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index 0626f2cb192e..3f858266fa7e 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -627,7 +627,7 @@ static int do_ip_setsockopt(struct sock *sk, int level, inet->nodefrag = val ? 1 : 0; break; case IP_MTU_DISCOVER: - if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_PROBE) + if (val < IP_PMTUDISC_DONT || val > IP_PMTUDISC_INTERFACE) goto e_inval; inet->pmtudisc = val; break; diff --git a/net/ipv4/route.c b/net/ipv4/route.c index d2d325382b13..f428935c50db 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1036,6 +1036,10 @@ void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu) bool new = false; bh_lock_sock(sk); + + if (!ip_sk_accept_pmtu(sk)) + goto out; + rt = (struct rtable *) __sk_dst_get(sk); if (sock_owned_by_user(sk) || !rt) { diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 300ab2c93f29..14bba8a1c5a7 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -288,6 +288,7 @@ static void tcp_v4_mtu_reduced(struct sock *sk) mtu = dst_mtu(dst); if (inet->pmtudisc != IP_PMTUDISC_DONT && + ip_sk_accept_pmtu(sk) && inet_csk(sk)->icsk_pmtu_cookie > mtu) { tcp_sync_mss(sk, mtu); |