[TCP]: TCP_DEFER_ACCEPT updates - process as established

Change TCP_DEFER_ACCEPT implementation so that it transitions a
connection to ESTABLISHED after handshake is complete instead of
leaving it in SYN-RECV until some data arrvies. Place connection in
accept queue when first data packet arrives from slow path.

Benefits:
  - established connection is now reset if it never makes it
   to the accept queue

 - diagnostic state of established matches with the packet traces
   showing completed handshake

 - TCP_DEFER_ACCEPT timeouts are expressed in seconds and can now be
   enforced with reasonable accuracy instead of rounding up to next
   exponential back-off of syn-ack retry.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/include/net/request_sock.h b/include/net/request_sock.h
index 040780add355..0369f98e9f3a 100644
--- a/include/net/request_sock.h
+++ b/include/net/request_sock.h
@@ -115,8 +115,8 @@ struct request_sock_queue {
         struct request_sock     *rskq_accept_head;
         struct request_sock     *rskq_accept_tail;
         rwlock_t                syn_wait_lock;
-        u8                      rskq_defer_accept;
-        /* 3 bytes hole, try to pack */
+        u16                     rskq_defer_accept;
+        /* 2 bytes hole, try to pack */
         struct listen_sock      *listen_opt;
 };