[ICSK]: Move TCP congestion avoidance members to icsk

This changeset basically moves tcp_sk()->{ca_ops,ca_state,etc} to inet_csk(),
minimal renaming/moving done in this changeset to ease review.

Most of it is just changes of struct tcp_sock * to struct sock * parameters.

With this we move to a state closer to two interesting goals:

1. Generalisation of net/ipv4/tcp_diag.c, becoming inet_diag.c, being used
   for any INET transport protocol that has struct inet_hashinfo and are
   derived from struct inet_connection_sock. Keeps the userspace API, that will
   just not display DCCP sockets, while newer versions of tools can support
   DCCP.

2. INET generic transport pluggable Congestion Avoidance infrastructure, using
   the current TCP CA infrastructure with DCCP.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 026630a15ea0..fe3c6d3d0c91 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -508,7 +508,8 @@ struct sock *inet_csk_clone(struct sock *sk, const struct request_sock *req,
                 newsk->sk_write_space = sk_stream_write_space;
 
                 newicsk->icsk_retransmits = 0;
-                newicsk->icsk_backoff = 0;
+                newicsk->icsk_backoff     = 0;
+                newicsk->icsk_probes_out  = 0;
 
                 /* Deinitialize accept_queue to trap illegal accesses. */
                 memset(&newicsk->icsk_accept_queue, 0, sizeof(newicsk->icsk_accept_queue));