[TCP] TCP YEAH: Use vegas dont copy it.

Rather than using a copy of vegas code, the YEAH code should just have
it exported so there is common code.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 131 deletions

diff --git a/net/ipv4/tcp_yeah.h b/net/ipv4/tcp_yeah.h
index 33ad5385c188..ed3b7198f23c 100644
--- a/net/ipv4/tcp_yeah.h
+++ b/net/ipv4/tcp_yeah.h
@@ -5,134 +5,3 @@
 #include <asm/div64.h>
 
 #include <net/tcp.h>
-
-/* Vegas variables */
-struct vegas {
-	u32	beg_snd_nxt;	/* right edge during last RTT */
-	u32	beg_snd_una;	/* left edge  during last RTT */
-	u32	beg_snd_cwnd;	/* saves the size of the cwnd */
-	u8	doing_vegas_now;/* if true, do vegas for this RTT */
-	u16	cntRTT;		/* # of RTTs measured within last RTT */
-	u32	minRTT;		/* min of RTTs measured within last RTT (in usec) */
-	u32	baseRTT;	/* the min of all Vegas RTT measurements seen (in usec) */
-};
-
-/* There are several situations when we must "re-start" Vegas:
- *
- *  o when a connection is established
- *  o after an RTO
- *  o after fast recovery
- *  o when we send a packet and there is no outstanding
- *    unacknowledged data (restarting an idle connection)
- *
- * In these circumstances we cannot do a Vegas calculation at the
- * end of the first RTT, because any calculation we do is using
- * stale info -- both the saved cwnd and congestion feedback are
- * stale.
- *
- * Instead we must wait until the completion of an RTT during
- * which we actually receive ACKs.
- */
-static inline void vegas_enable(struct sock *sk)
-{
-	const struct tcp_sock *tp = tcp_sk(sk);
-	struct vegas *vegas = inet_csk_ca(sk);
-
-	/* Begin taking Vegas samples next time we send something. */
-	vegas->doing_vegas_now = 1;
-
-	/* Set the beginning of the next send window. */
-	vegas->beg_snd_nxt = tp->snd_nxt;
-
-	vegas->cntRTT = 0;
-	vegas->minRTT = 0x7fffffff;
-}
-
-/* Stop taking Vegas samples for now. */
-static inline void vegas_disable(struct sock *sk)
-{
-	struct vegas *vegas = inet_csk_ca(sk);
-
-	vegas->doing_vegas_now = 0;
-}
-
-static void tcp_vegas_init(struct sock *sk)
-{
-	struct vegas *vegas = inet_csk_ca(sk);
-
-	vegas->baseRTT = 0x7fffffff;
-	vegas_enable(sk);
-}
-
-static void tcp_vegas_state(struct sock *sk, u8 ca_state)
-{
-
-	if (ca_state == TCP_CA_Open)
-		vegas_enable(sk);
-	else
-		vegas_disable(sk);
-}
-
-/* Do RTT sampling needed for Vegas.
- * Basically we:
- *   o min-filter RTT samples from within an RTT to get the current
- *     propagation delay + queuing delay (we are min-filtering to try to
- *     avoid the effects of delayed ACKs)
- *   o min-filter RTT samples from a much longer window (forever for now)
- *     to find the propagation delay (baseRTT)
- */
-static void tcp_vegas_pkts_acked(struct sock *sk, u32 cnt, ktime_t last)
-{
-	struct vegas *vegas = inet_csk_ca(sk);
-	u32 vrtt;
-
-	/* Never allow zero rtt or baseRTT */
-	vrtt = (ktime_to_ns(net_timedelta(last)) / NSEC_PER_USEC) + 1;
-
-	/* Filter to find propagation delay: */
-	if (vrtt < vegas->baseRTT)
-		vegas->baseRTT = vrtt;
-
-	/* Find the min RTT during the last RTT to find
-	 * the current prop. delay + queuing delay:
-	 */
-	vegas->minRTT = min(vegas->minRTT, vrtt);
-	vegas->cntRTT++;
-}
-
-/*
- * If the connection is idle and we are restarting,
- * then we don't want to do any Vegas calculations
- * until we get fresh RTT samples.  So when we
- * restart, we reset our Vegas state to a clean
- * slate. After we get acks for this flight of
- * packets, _then_ we can make Vegas calculations
- * again.
- */
-static void tcp_vegas_cwnd_event(struct sock *sk, enum tcp_ca_event event)
-{
-	if (event == CA_EVENT_CWND_RESTART ||
-	    event == CA_EVENT_TX_START)
-		tcp_vegas_init(sk);
-}
-
-/* Extract info for Tcp socket info provided via netlink. */
-static void tcp_vegas_get_info(struct sock *sk, u32 ext,
-			       struct sk_buff *skb)
-{
-	const struct vegas *ca = inet_csk_ca(sk);
-	if (ext & (1 << (INET_DIAG_VEGASINFO - 1))) {
-		struct tcpvegas_info *info;
-
-		info = RTA_DATA(__RTA_PUT(skb, INET_DIAG_VEGASINFO,
-					  sizeof(*info)));
-
-		info->tcpv_enabled = ca->doing_vegas_now;
-		info->tcpv_rttcnt = ca->cntRTT;
-		info->tcpv_rtt = ca->baseRTT;
-		info->tcpv_minrtt = ca->minRTT;
-	rtattr_failure:	;
-	}
-}
-
-