Auto merge with /home/aegl/GIT/linus

1 files changed, 17 insertions, 139 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index ec9e20c2717..a166918ca56 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -721,11 +721,16 @@ static inline int tcp_ack_scheduled(struct tcp_sock *tp)
 	return tp->ack.pending&TCP_ACK_SCHED;
 }
 
-static __inline__ void tcp_dec_quickack_mode(struct tcp_sock *tp)
+static __inline__ void tcp_dec_quickack_mode(struct tcp_sock *tp, unsigned int pkts)
 {
-	if (tp->ack.quick && --tp->ack.quick == 0) {
-		/* Leaving quickack mode we deflate ATO. */
-		tp->ack.ato = TCP_ATO_MIN;
+	if (tp->ack.quick) {
+		if (pkts >= tp->ack.quick) {
+			tp->ack.quick = 0;
+
+			/* Leaving quickack mode we deflate ATO. */
+			tp->ack.ato = TCP_ATO_MIN;
+		} else
+			tp->ack.quick -= pkts;
 	}
 }
 
@@ -843,7 +848,9 @@ extern __u32 cookie_v4_init_sequence(struct sock *sk, struct sk_buff *skb,
 
 /* tcp_output.c */
 
-extern int tcp_write_xmit(struct sock *, int nonagle);
+extern void __tcp_push_pending_frames(struct sock *sk, struct tcp_sock *tp,
+				      unsigned int cur_mss, int nonagle);
+extern int tcp_may_send_now(struct sock *sk, struct tcp_sock *tp);
 extern int tcp_retransmit_skb(struct sock *, struct sk_buff *);
 extern void tcp_xmit_retransmit_queue(struct sock *);
 extern void tcp_simple_retransmit(struct sock *);
@@ -855,10 +862,13 @@ extern int  tcp_write_wakeup(struct sock *);
 extern void tcp_send_fin(struct sock *sk);
 extern void tcp_send_active_reset(struct sock *sk, int priority);
 extern int  tcp_send_synack(struct sock *);
-extern void tcp_push_one(struct sock *, unsigned mss_now);
+extern void tcp_push_one(struct sock *, unsigned int mss_now);
 extern void tcp_send_ack(struct sock *sk);
 extern void tcp_send_delayed_ack(struct sock *sk);
 
+/* tcp_input.c */
+extern void tcp_cwnd_application_limited(struct sock *sk);
+
 /* tcp_timer.c */
 extern void tcp_init_xmit_timers(struct sock *);
 extern void tcp_clear_xmit_timers(struct sock *);
@@ -958,7 +968,7 @@ static inline void tcp_reset_xmit_timer(struct sock *sk, int what, unsigned long
 static inline void tcp_initialize_rcv_mss(struct sock *sk)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
-	unsigned int hint = min(tp->advmss, tp->mss_cache_std);
+	unsigned int hint = min_t(unsigned int, tp->advmss, tp->mss_cache);
 
 	hint = min(hint, tp->rcv_wnd/2);
 	hint = min(hint, TCP_MIN_RCVMSS);
@@ -1225,28 +1235,6 @@ static inline void tcp_sync_left_out(struct tcp_sock *tp)
 	tp->left_out = tp->sacked_out + tp->lost_out;
 }
 
-extern void tcp_cwnd_application_limited(struct sock *sk);
-
-/* Congestion window validation. (RFC2861) */
-
-static inline void tcp_cwnd_validate(struct sock *sk, struct tcp_sock *tp)
-{
-	__u32 packets_out = tp->packets_out;
-
-	if (packets_out >= tp->snd_cwnd) {
-		/* Network is feed fully. */
-		tp->snd_cwnd_used = 0;
-		tp->snd_cwnd_stamp = tcp_time_stamp;
-	} else {
-		/* Network starves. */
-		if (tp->packets_out > tp->snd_cwnd_used)
-			tp->snd_cwnd_used = tp->packets_out;
-
-		if ((s32)(tcp_time_stamp - tp->snd_cwnd_stamp) >= tp->rto)
-			tcp_cwnd_application_limited(sk);
-	}
-}
-
 /* Set slow start threshould and cwnd not falling to slow start */
 static inline void __tcp_enter_cwr(struct tcp_sock *tp)
 {
@@ -1279,12 +1267,6 @@ static __inline__ __u32 tcp_max_burst(const struct tcp_sock *tp)
 	return 3;
 }
 
-static __inline__ int tcp_minshall_check(const struct tcp_sock *tp)
-{
-	return after(tp->snd_sml,tp->snd_una) &&
-		!after(tp->snd_sml, tp->snd_nxt);
-}
-
 static __inline__ void tcp_minshall_update(struct tcp_sock *tp, int mss, 
 					   const struct sk_buff *skb)
 {
@@ -1292,122 +1274,18 @@ static __inline__ void tcp_minshall_update(struct tcp_sock *tp, int mss,
 		tp->snd_sml = TCP_SKB_CB(skb)->end_seq;
 }
 
-/* Return 0, if packet can be sent now without violation Nagle's rules:
-   1. It is full sized.
-   2. Or it contains FIN.
-   3. Or TCP_NODELAY was set.
-   4. Or TCP_CORK is not set, and all sent packets are ACKed.
-      With Minshall's modification: all sent small packets are ACKed.
- */
-
-static __inline__ int
-tcp_nagle_check(const struct tcp_sock *tp, const struct sk_buff *skb, 
-		unsigned mss_now, int nonagle)
-{
-	return (skb->len < mss_now &&
-		!(TCP_SKB_CB(skb)->flags & TCPCB_FLAG_FIN) &&
-		((nonagle&TCP_NAGLE_CORK) ||
-		 (!nonagle &&
-		  tp->packets_out &&
-		  tcp_minshall_check(tp))));
-}
-
-extern void tcp_set_skb_tso_segs(struct sock *, struct sk_buff *);
-
-/* This checks if the data bearing packet SKB (usually sk->sk_send_head)
- * should be put on the wire right now.
- */
-static __inline__ int tcp_snd_test(struct sock *sk,
-				   struct sk_buff *skb,
-				   unsigned cur_mss, int nonagle)
-{
-	struct tcp_sock *tp = tcp_sk(sk);
-	int pkts = tcp_skb_pcount(skb);
-
-	if (!pkts) {
-		tcp_set_skb_tso_segs(sk, skb);
-		pkts = tcp_skb_pcount(skb);
-	}
-
-	/*	RFC 1122 - section 4.2.3.4
-	 *
-	 *	We must queue if
-	 *
-	 *	a) The right edge of this frame exceeds the window
-	 *	b) There are packets in flight and we have a small segment
-	 *	   [SWS avoidance and Nagle algorithm]
-	 *	   (part of SWS is done on packetization)
-	 *	   Minshall version sounds: there are no _small_
-	 *	   segments in flight. (tcp_nagle_check)
-	 *	c) We have too many packets 'in flight'
-	 *
-	 * 	Don't use the nagle rule for urgent data (or
-	 *	for the final FIN -DaveM).
-	 *
-	 *	Also, Nagle rule does not apply to frames, which
-	 *	sit in the middle of queue (they have no chances
-	 *	to get new data) and if room at tail of skb is
-	 *	not enough to save something seriously (<32 for now).
-	 */
-
-	/* Don't be strict about the congestion window for the
-	 * final FIN frame.  -DaveM
-	 */
-	return (((nonagle&TCP_NAGLE_PUSH) || tp->urg_mode
-		 || !tcp_nagle_check(tp, skb, cur_mss, nonagle)) &&
-		(((tcp_packets_in_flight(tp) + (pkts-1)) < tp->snd_cwnd) ||
-		 (TCP_SKB_CB(skb)->flags & TCPCB_FLAG_FIN)) &&
-		!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una + tp->snd_wnd));
-}
-
 static __inline__ void tcp_check_probe_timer(struct sock *sk, struct tcp_sock *tp)
 {
 	if (!tp->packets_out && !tp->pending)
 		tcp_reset_xmit_timer(sk, TCP_TIME_PROBE0, tp->rto);
 }
 
-static __inline__ int tcp_skb_is_last(const struct sock *sk, 
-				      const struct sk_buff *skb)
-{
-	return skb->next == (struct sk_buff *)&sk->sk_write_queue;
-}
-
-/* Push out any pending frames which were held back due to
- * TCP_CORK or attempt at coalescing tiny packets.
- * The socket must be locked by the caller.
- */
-static __inline__ void __tcp_push_pending_frames(struct sock *sk,
-						 struct tcp_sock *tp,
-						 unsigned cur_mss,
-						 int nonagle)
-{
-	struct sk_buff *skb = sk->sk_send_head;
-
-	if (skb) {
-		if (!tcp_skb_is_last(sk, skb))
-			nonagle = TCP_NAGLE_PUSH;
-		if (!tcp_snd_test(sk, skb, cur_mss, nonagle) ||
-		    tcp_write_xmit(sk, nonagle))
-			tcp_check_probe_timer(sk, tp);
-	}
-	tcp_cwnd_validate(sk, tp);
-}
-
 static __inline__ void tcp_push_pending_frames(struct sock *sk,
 					       struct tcp_sock *tp)
 {
 	__tcp_push_pending_frames(sk, tp, tcp_current_mss(sk, 1), tp->nonagle);
 }
 
-static __inline__ int tcp_may_send_now(struct sock *sk, struct tcp_sock *tp)
-{
-	struct sk_buff *skb = sk->sk_send_head;
-
-	return (skb &&
-		tcp_snd_test(sk, skb, tcp_current_mss(sk, 1),
-			     tcp_skb_is_last(sk, skb) ? TCP_NAGLE_PUSH : tp->nonagle));
-}
-
 static __inline__ void tcp_init_wl(struct tcp_sock *tp, u32 ack, u32 seq)
 {
 	tp->snd_wl1 = seq;