[TCP]: Add pluggable congestion control algorithm infrastructure.

Allow TCP to have multiple pluggable congestion control algorithms.
Algorithms are defined by a set of operations and can be built in
or modules.  The legacy "new RENO" algorithm is used as a starting
point and fallback.

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

1 files changed, 2 insertions, 18 deletions

diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index 634befc07921..867acc0f79d8 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -42,7 +42,6 @@ struct tcpdiag_entry
 
 static struct sock *tcpnl;
 
-
 #define TCPDIAG_PUT(skb, attrtype, attrlen) \
 ({ int rtalen = RTA_LENGTH(attrlen);        \
    struct rtattr *rta;                      \
@@ -61,7 +60,6 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
         struct nlmsghdr  *nlh;
         struct tcp_info  *info = NULL;
         struct tcpdiag_meminfo  *minfo = NULL;
-        struct tcpvegas_info *vinfo = NULL;
         unsigned char    *b = skb->tail;
 
         nlh = NLMSG_PUT(skb, pid, seq, TCPDIAG_GETSOCK, sizeof(*r));
@@ -73,9 +71,6 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
                 if (ext & (1<<(TCPDIAG_INFO-1)))
                         info = TCPDIAG_PUT(skb, TCPDIAG_INFO, sizeof(*info));
                 
-                if ((tcp_is_westwood(tp) || tcp_is_vegas(tp))
-                    && (ext & (1<<(TCPDIAG_VEGASINFO-1))))
-                        vinfo = TCPDIAG_PUT(skb, TCPDIAG_VEGASINFO, sizeof(*vinfo));
         }
         r->tcpdiag_family = sk->sk_family;
         r->tcpdiag_state = sk->sk_state;
@@ -166,19 +161,8 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
         if (info) 
                 tcp_get_info(sk, info);
 
-        if (vinfo) {
-                if (tcp_is_vegas(tp)) {
-                        vinfo->tcpv_enabled = tp->vegas.doing_vegas_now;
-                        vinfo->tcpv_rttcnt = tp->vegas.cntRTT;
-                        vinfo->tcpv_rtt = jiffies_to_usecs(tp->vegas.baseRTT);
-                        vinfo->tcpv_minrtt = jiffies_to_usecs(tp->vegas.minRTT);
-                } else {
-                        vinfo->tcpv_enabled = 0;
-                        vinfo->tcpv_rttcnt = 0;
-                        vinfo->tcpv_rtt = jiffies_to_usecs(tp->westwood.rtt);
-                        vinfo->tcpv_minrtt = jiffies_to_usecs(tp->westwood.rtt_min);
-                }
-        }
+        if (sk->sk_state < TCP_TIME_WAIT && tp->ca_ops->get_info)
+                tp->ca_ops->get_info(tp, ext, skb);
 
         nlh->nlmsg_len = skb->tail - b;
         return skb->len;