[TCP]: TCP_DEFER_ACCEPT updates - defer timeout conflicts with max_thresh

timeout associated with SO_DEFER_ACCEPT wasn't being honored if it was
less than the timeout allowed by the maximum syn-recv queue size
algorithm. Fix by using the SO_DEFER_ACCEPT value if the ack has
arrived.

Signed-off-by: Patrick McManus <mcmanus@ducksong.com>
Acked-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 2 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index c0e0fa03fce1..f24c7d534081 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -461,8 +461,7 @@ void inet_csk_reqsk_queue_prune(struct sock *parent,
                 reqp=&lopt->syn_table[i];
                 while ((req = *reqp) != NULL) {
                         if (time_after_eq(now, req->expires)) {
-                                if ((req->retrans < thresh ||
-                                     (inet_rsk(req)->acked && req->retrans < max_retries))
+                                if ((req->retrans < (inet_rsk(req)->acked ? max_retries : thresh))
                                     && !req->rsk_ops->rtx_syn_ack(parent, req)) {
                                         unsigned long timeo;