1 files changed, 5 insertions, 1 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index c5cfd5ec3184..27a32acfdb62 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2864,6 +2864,7 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn)
         struct sk_buff *syn_data = NULL, *data;
         unsigned long last_syn_loss = 0;
 
+        tp->rx_opt.mss_clamp = tp->advmss;  /* If MSS is not cached */
         tcp_fastopen_cache_get(sk, &tp->rx_opt.mss_clamp, &fo->cookie,
                                &syn_loss, &last_syn_loss);
         /* Recurring FO SYN losses: revert to regular handshake temporarily */
@@ -2873,7 +2874,9 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn)
                 goto fallback;
         }
 
-        if (fo->cookie.len <= 0)
+        if (sysctl_tcp_fastopen & TFO_CLIENT_NO_COOKIE)
+                fo->cookie.len = -1;
+        else if (fo->cookie.len <= 0)
                 goto fallback;
 
         /* MSS for SYN-data is based on cached MSS and bounded by PMTU and
@@ -2916,6 +2919,7 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn)
         fo->copied = data->len;
 
         if (tcp_transmit_skb(sk, syn_data, 0, sk->sk_allocation) == 0) {
+                tp->syn_data = (fo->copied > 0);
                 NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPFASTOPENACTIVE);
                 goto done;
         }