ipv6: Add helper inet6_csk_update_pmtu().
This is the ipv6 version of inet_csk_update_pmtu().
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 3071f37..ecdf241 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -378,43 +378,14 @@
if ((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE))
goto out;
- /* icmp should have updated the destination cache entry */
- dst = __sk_dst_check(sk, np->dst_cookie);
-
- if (dst == NULL) {
- struct inet_sock *inet = inet_sk(sk);
- struct flowi6 fl6;
-
- /* BUGGG_FUTURE: Again, it is not clear how
- to handle rthdr case. Ignore this complexity
- for now.
- */
- memset(&fl6, 0, sizeof(fl6));
- fl6.flowi6_proto = IPPROTO_TCP;
- fl6.daddr = np->daddr;
- fl6.saddr = np->saddr;
- fl6.flowi6_oif = sk->sk_bound_dev_if;
- fl6.flowi6_mark = sk->sk_mark;
- fl6.fl6_dport = inet->inet_dport;
- fl6.fl6_sport = inet->inet_sport;
- security_skb_classify_flow(skb, flowi6_to_flowi(&fl6));
-
- dst = ip6_dst_lookup_flow(sk, &fl6, NULL, false);
- if (IS_ERR(dst)) {
- sk->sk_err_soft = -PTR_ERR(dst);
- goto out;
- }
-
- } else
- dst_hold(dst);
-
- dst->ops->update_pmtu(dst, ntohl(info));
+ 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);
- } /* else let the usual retransmit timer handle it */
- dst_release(dst);
+ }
goto out;
}