[TCP]: Move code from tcp_ecn.h to tcp*.c and tcp.h & remove it

No other users exist for tcp_ecn.h. Very few things remain in
tcp.h, for most TCP ECN functions callers reside within a
single .c file and can be placed there.

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

2 files changed, 12 insertions, 132 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 54053de0bdd..dde04afbe0a 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -39,6 +39,7 @@
 #include <net/snmp.h>
 #include <net/ip.h>
 #include <net/tcp_states.h>
+#include <net/inet_ecn.h>
 
 #include <linux/seq_file.h>
 
@@ -330,6 +331,17 @@ static inline void tcp_clear_options(struct tcp_options_received *rx_opt)
  	rx_opt->tstamp_ok = rx_opt->sack_ok = rx_opt->wscale_ok = rx_opt->snd_wscale = 0;
 }
 
+#define	TCP_ECN_OK		1
+#define	TCP_ECN_QUEUE_CWR	2
+#define	TCP_ECN_DEMAND_CWR	4
+
+static __inline__ void
+TCP_ECN_create_request(struct request_sock *req, struct tcphdr *th)
+{
+	if (sysctl_tcp_ecn && th->ece && th->cwr)
+		inet_rsk(req)->ecn_ok = 1;
+}
+
 enum tcp_tw_status
 {
 	TCP_TW_SUCCESS = 0,
@@ -573,8 +585,6 @@ struct tcp_skb_cb {
 
 #define TCP_SKB_CB(__skb)	((struct tcp_skb_cb *)&((__skb)->cb[0]))
 
-#include <net/tcp_ecn.h>
-
 /* Due to TSO, an SKB can be composed of multiple actual
  * packets.  To keep these tracked properly, we use this.
  */
diff --git a/include/net/tcp_ecn.h b/include/net/tcp_ecn.h
deleted file mode 100644
index 89eb3e05116..00000000000
--- a/include/net/tcp_ecn.h
+++ /dev/null
@@ -1,130 +0,0 @@
-#ifndef _NET_TCP_ECN_H_
-#define _NET_TCP_ECN_H_ 1
-
-#include <net/inet_ecn.h>
-#include <net/request_sock.h>
-
-#define TCP_HP_BITS (~(TCP_RESERVED_BITS|TCP_FLAG_PSH))
-
-#define	TCP_ECN_OK		1
-#define TCP_ECN_QUEUE_CWR	2
-#define TCP_ECN_DEMAND_CWR	4
-
-static inline void TCP_ECN_queue_cwr(struct tcp_sock *tp)
-{
-	if (tp->ecn_flags&TCP_ECN_OK)
-		tp->ecn_flags |= TCP_ECN_QUEUE_CWR;
-}
-
-
-/* Output functions */
-
-static inline void TCP_ECN_send_synack(struct tcp_sock *tp,
-				       struct sk_buff *skb)
-{
-	TCP_SKB_CB(skb)->flags &= ~TCPCB_FLAG_CWR;
-	if (!(tp->ecn_flags&TCP_ECN_OK))
-		TCP_SKB_CB(skb)->flags &= ~TCPCB_FLAG_ECE;
-}
-
-static inline void TCP_ECN_send_syn(struct sock *sk, struct sk_buff *skb)
-{
-	struct tcp_sock *tp = tcp_sk(sk);
-
-	tp->ecn_flags = 0;
-	if (sysctl_tcp_ecn) {
-		TCP_SKB_CB(skb)->flags |= TCPCB_FLAG_ECE|TCPCB_FLAG_CWR;
-		tp->ecn_flags = TCP_ECN_OK;
-	}
-}
-
-static __inline__ void
-TCP_ECN_make_synack(struct request_sock *req, struct tcphdr *th)
-{
-	if (inet_rsk(req)->ecn_ok)
-		th->ece = 1;
-}
-
-static inline void TCP_ECN_send(struct sock *sk, struct sk_buff *skb,
-				int tcp_header_len)
-{
-	struct tcp_sock *tp = tcp_sk(sk);
-
-	if (tp->ecn_flags & TCP_ECN_OK) {
-		/* Not-retransmitted data segment: set ECT and inject CWR. */
-		if (skb->len != tcp_header_len &&
-		    !before(TCP_SKB_CB(skb)->seq, tp->snd_nxt)) {
-			INET_ECN_xmit(sk);
-			if (tp->ecn_flags&TCP_ECN_QUEUE_CWR) {
-				tp->ecn_flags &= ~TCP_ECN_QUEUE_CWR;
-				tcp_hdr(skb)->cwr = 1;
-				skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
-			}
-		} else {
-			/* ACK or retransmitted segment: clear ECT|CE */
-			INET_ECN_dontxmit(sk);
-		}
-		if (tp->ecn_flags & TCP_ECN_DEMAND_CWR)
-			tcp_hdr(skb)->ece = 1;
-	}
-}
-
-/* Input functions */
-
-static inline void TCP_ECN_accept_cwr(struct tcp_sock *tp, struct sk_buff *skb)
-{
-	if (tcp_hdr(skb)->cwr)
-		tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
-}
-
-static inline void TCP_ECN_withdraw_cwr(struct tcp_sock *tp)
-{
-	tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
-}
-
-static inline void TCP_ECN_check_ce(struct tcp_sock *tp, struct sk_buff *skb)
-{
-	if (tp->ecn_flags&TCP_ECN_OK) {
-		if (INET_ECN_is_ce(TCP_SKB_CB(skb)->flags))
-			tp->ecn_flags |= TCP_ECN_DEMAND_CWR;
-		/* Funny extension: if ECT is not set on a segment,
-		 * it is surely retransmit. It is not in ECN RFC,
-		 * but Linux follows this rule. */
-		else if (INET_ECN_is_not_ect((TCP_SKB_CB(skb)->flags)))
-			tcp_enter_quickack_mode((struct sock *)tp);
-	}
-}
-
-static inline void TCP_ECN_rcv_synack(struct tcp_sock *tp, struct tcphdr *th)
-{
-	if ((tp->ecn_flags&TCP_ECN_OK) && (!th->ece || th->cwr))
-		tp->ecn_flags &= ~TCP_ECN_OK;
-}
-
-static inline void TCP_ECN_rcv_syn(struct tcp_sock *tp, struct tcphdr *th)
-{
-	if ((tp->ecn_flags&TCP_ECN_OK) && (!th->ece || !th->cwr))
-		tp->ecn_flags &= ~TCP_ECN_OK;
-}
-
-static inline int TCP_ECN_rcv_ecn_echo(struct tcp_sock *tp, struct tcphdr *th)
-{
-	if (th->ece && !th->syn && (tp->ecn_flags&TCP_ECN_OK))
-		return 1;
-	return 0;
-}
-
-static inline void TCP_ECN_openreq_child(struct tcp_sock *tp,
-					 struct request_sock *req)
-{
-	tp->ecn_flags = inet_rsk(req)->ecn_ok ? TCP_ECN_OK : 0;
-}
-
-static __inline__ void
-TCP_ECN_create_request(struct request_sock *req, struct tcphdr *th)
-{
-	if (sysctl_tcp_ecn && th->ece && th->cwr)
-		inet_rsk(req)->ecn_ok = 1;
-}
-
-#endif