X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=net%2Fipv4%2Ftcp_output.c;h=c5b911f9b662cb33b959755cebd3f2fb8d8c7fe0;hb=217df670d9a4da036d68b22500ac06128811d5c8;hp=c10e4435e3b1258a9ca0b5615be8af6d103142a2;hpb=2f79f458d2ab4a77f1b9df8d0041e51ce085d7c0;p=linux-2.6

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index c10e4435e3..c5b911f9b6 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -190,7 +190,7 @@ void tcp_select_initial_window(int __space, __u32 mss,
 	}
 
 	/* Set initial window to value enough for senders,
-	 * following RFC1414. Senders, not following this RFC,
+	 * following RFC2414. Senders, not following this RFC,
 	 * will be satisfied with 2.
 	 */
 	if (mss > (1<<*rcv_wscale)) {
@@ -435,6 +435,8 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
 	int nsize, old_factor;
 	u16 flags;
 
+	BUG_ON(len >= skb->len);
+
 	nsize = skb_headlen(skb) - len;
 	if (nsize < 0)
 		nsize = 0;
@@ -459,9 +461,7 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
 	flags = TCP_SKB_CB(skb)->flags;
 	TCP_SKB_CB(skb)->flags = flags & ~(TCPCB_FLAG_FIN|TCPCB_FLAG_PSH);
 	TCP_SKB_CB(buff)->flags = flags;
-	TCP_SKB_CB(buff)->sacked =
-		(TCP_SKB_CB(skb)->sacked &
-		 (TCPCB_LOST | TCPCB_EVER_RETRANS | TCPCB_AT_TAIL));
+	TCP_SKB_CB(buff)->sacked = TCP_SKB_CB(skb)->sacked;
 	TCP_SKB_CB(skb)->sacked &= ~TCPCB_AT_TAIL;
 
 	if (!skb_shinfo(skb)->nr_frags && skb->ip_summed != CHECKSUM_HW) {
@@ -499,11 +499,26 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned int mss
 			tcp_skb_pcount(buff);
 
 		tp->packets_out -= diff;
+
+		if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)
+			tp->sacked_out -= diff;
+		if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS)
+			tp->retrans_out -= diff;
+
 		if (TCP_SKB_CB(skb)->sacked & TCPCB_LOST) {
 			tp->lost_out -= diff;
 			tp->left_out -= diff;
 		}
+
 		if (diff > 0) {
+			/* Adjust Reno SACK estimate. */
+			if (!tp->rx_opt.sack_ok) {
+				tp->sacked_out -= diff;
+				if ((int)tp->sacked_out < 0)
+					tp->sacked_out = 0;
+				tcp_sync_left_out(tp);
+			}
+
 			tp->fackets_out -= diff;
 			if ((int)tp->fackets_out < 0)
 				tp->fackets_out = 0;