[PATCH] tcp: Cache inetpeer in timewait socket, and only when necessary.

Since it's guarenteed that we will access the inetpeer if we're trying
to do timewait recycling and TCP options were enabled on the
connection, just cache the peer in the timewait socket.

In the future, inetpeer lookups will be context dependent (per routing
realm), and this helps facilitate that as well.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 4c5b6328337..23e8234f75a 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -506,8 +506,9 @@ struct tcp_timewait_sock {
         u32                       tw_rcv_wnd;
         u32                       tw_ts_recent;
         long                      tw_ts_recent_stamp;
+        struct inet_peer          *tw_peer;
 #ifdef CONFIG_TCP_MD5SIG
-        struct tcp_md5sig_key   *tw_md5_key;
+        struct tcp_md5sig_key     *tw_md5_key;
 #endif
         /* Few sockets in timewait have cookies; in that case, then this
          * object holds a reference to them (tw_cookie_values->kref).