Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial

[powerpc.git] / net / ipv4 / tcp_vegas.c

diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c
index 8cef9dc..b7d296a 100644 (file)
--- a/net/ipv4/tcp_vegas.c
+++ b/net/ipv4/tcp_vegas.c
@@ -35,7 +35,7 @@
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/skbuff.h>
-#include <linux/tcp_diag.h>
+#include <linux/inet_diag.h>
 
 #include <net/tcp.h>
 
@@ -236,8 +236,7 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack,
                        /* We don't have enough RTT samples to do the Vegas
                         * calculation, so we'll behave like Reno.
                         */
-                       if (tp->snd_cwnd > tp->snd_ssthresh)
-                               tp->snd_cwnd++;
+                       tcp_reno_cong_avoid(sk, ack, seq_rtt, in_flight, flag);
                } else {
                        u32 rtt, target_cwnd, diff;
 
@@ -275,7 +274,7 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack,
                         */
                        diff = (old_wnd << V_PARAM_SHIFT) - target_cwnd;
 
-                       if (tp->snd_cwnd < tp->snd_ssthresh) {
+                       if (tp->snd_cwnd <= tp->snd_ssthresh) {
                                /* Slow start.  */
                                if (diff > gamma) {
                                        /* Going too fast. Time to slow down
@@ -295,6 +294,7 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack,
                                                            V_PARAM_SHIFT)+1);
 
                                }
+                               tcp_slow_start(tp);
                        } else {
                                /* Congestion avoidance. */
                                u32 next_snd_cwnd;
@@ -327,37 +327,17 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack,
                                else if (next_snd_cwnd < tp->snd_cwnd)
                                        tp->snd_cwnd--;
                        }
-               }
 
-               /* Wipe the slate clean for the next RTT. */
-               vegas->cntRTT = 0;
-               vegas->minRTT = 0x7fffffff;
+                       if (tp->snd_cwnd < 2)
+                               tp->snd_cwnd = 2;
+                       else if (tp->snd_cwnd > tp->snd_cwnd_clamp)
+                               tp->snd_cwnd = tp->snd_cwnd_clamp;
+               }
        }
 
-       /* The following code is executed for every ack we receive,
-        * except for conditions checked in should_advance_cwnd()
-        * before the call to tcp_cong_avoid(). Mainly this means that
-        * we only execute this code if the ack actually acked some
-        * data.
-        */
-
-       /* If we are in slow start, increase our cwnd in response to this ACK.
-        * (If we are not in slow start then we are in congestion avoidance,
-        * and adjust our congestion window only once per RTT. See the code
-        * above.)
-        */
-       if (tp->snd_cwnd <= tp->snd_ssthresh)
-               tp->snd_cwnd++;
-
-       /* to keep cwnd from growing without bound */
-       tp->snd_cwnd = min_t(u32, tp->snd_cwnd, tp->snd_cwnd_clamp);
-
-       /* Make sure that we are never so timid as to reduce our cwnd below
-        * 2 MSS.
-        *
-        * Going below 2 MSS would risk huge delayed ACKs from our receiver.
-        */
-       tp->snd_cwnd = max(tp->snd_cwnd, 2U);
+       /* Wipe the slate clean for the next RTT. */
+       vegas->cntRTT = 0;
+       vegas->minRTT = 0x7fffffff;
 }
 
 /* Extract info for Tcp socket info provided via netlink. */