From: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Date: Tue, 3 Jul 2007 05:07:22 +0000 (-0700)
Subject: [TCP]: SACK fastpath did override adjusted fackets_out
X-Git-Tag: v2.6.23-rc1~1109^2~112
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0410051164bbbc597e15f068b53c06a954ae0d4;p=linux-2.6

[TCP]: SACK fastpath did override adjusted fackets_out

Do same adjustment to SACK fastpath counters provided that
they're valid.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 53232dd6fb..20aea1595c 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -699,6 +699,14 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
 			tp->fackets_out -= diff;
 			if ((int)tp->fackets_out < 0)
 				tp->fackets_out = 0;
+			/* SACK fastpath might overwrite it unless dealt with */
+			if (tp->fastpath_skb_hint != NULL &&
+			    after(TCP_SKB_CB(tp->fastpath_skb_hint)->seq,
+				  TCP_SKB_CB(skb)->seq)) {
+				tp->fastpath_cnt_hint -= diff;
+				if ((int)tp->fastpath_cnt_hint < 0)
+					tp->fastpath_cnt_hint = 0;
+			}
 		}
 	}