tcp: Revert reset of deferred accept changes in 2.6.26

[linux-2.6] / net / ipv4 / tcp.c

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index ab66683b804343fc852b93220d41e83d80275512..fc54a48fde1e6a6b07a157b1cc551427d226099b 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2112,12 +2112,15 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
                break;
 
        case TCP_DEFER_ACCEPT:
-               if (val < 0) {
-                       err = -EINVAL;
-               } else {
-                       if (val > MAX_TCP_ACCEPT_DEFERRED)
-                               val = MAX_TCP_ACCEPT_DEFERRED;
-                       icsk->icsk_accept_queue.rskq_defer_accept = val;
+               icsk->icsk_accept_queue.rskq_defer_accept = 0;
+               if (val > 0) {
+                       /* Translate value in seconds to number of
+                        * retransmits */
+                       while (icsk->icsk_accept_queue.rskq_defer_accept < 32 &&
+                              val > ((TCP_TIMEOUT_INIT / HZ) <<
+                                      icsk->icsk_accept_queue.rskq_defer_accept))
+                               icsk->icsk_accept_queue.rskq_defer_accept++;
+                       icsk->icsk_accept_queue.rskq_defer_accept++;
                }
                break;
 
@@ -2299,7 +2302,8 @@ static int do_tcp_getsockopt(struct sock *sk, int level,
                        val = (val ? : sysctl_tcp_fin_timeout) / HZ;
                break;
        case TCP_DEFER_ACCEPT:
-               val = icsk->icsk_accept_queue.rskq_defer_accept;
+               val = !icsk->icsk_accept_queue.rskq_defer_accept ? 0 :
+                       ((TCP_TIMEOUT_INIT / HZ) << (icsk->icsk_accept_queue.rskq_defer_accept - 1));
                break;
        case TCP_WINDOW_CLAMP:
                val = tp->window_clamp;