return err;
}
+static void tcp_v6_mtu_reduced(struct sock *sk)
+{
+ struct dst_entry *dst;
+
+ if ((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE))
+ return;
+
+ dst = inet6_csk_update_pmtu(sk, tcp_sk(sk)->mtu_info);
+ if (!dst)
+ return;
+
+ if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
+ tcp_sync_mss(sk, dst_mtu(dst));
+ tcp_simple_retransmit(sk);
+ }
+}
+
static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
u8 type, u8 code, int offset, __be32 info)
{
}
bh_lock_sock(sk);
- if (sock_owned_by_user(sk))
+ if (sock_owned_by_user(sk) && type != ICMPV6_PKT_TOOBIG)
NET_INC_STATS_BH(net, LINUX_MIB_LOCKDROPPEDICMPS);
if (sk->sk_state == TCP_CLOSE)
}
if (type == ICMPV6_PKT_TOOBIG) {
- struct dst_entry *dst;
-
- if (sock_owned_by_user(sk))
- goto out;
- if ((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE))
- goto out;
-
- dst = inet6_csk_update_pmtu(sk, ntohl(info));
- if (!dst)
- goto out;
-
- if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
- tcp_sync_mss(sk, dst_mtu(dst));
- tcp_simple_retransmit(sk);
- }
+ tp->mtu_info = ntohl(info);
+ if (!sock_owned_by_user(sk))
+ tcp_v6_mtu_reduced(sk);
+ else
+ set_bit(TCP_MTU_REDUCED_DEFERRED, &tp->tsq_flags);
goto out;
}
.sendpage = tcp_sendpage,
.backlog_rcv = tcp_v6_do_rcv,
.release_cb = tcp_release_cb,
+ .mtu_reduced = tcp_v6_mtu_reduced,
.hash = tcp_v6_hash,
.unhash = inet_unhash,
.get_port = inet_csk_get_port,