[CCID3]: Introduce include/linux/tfrc.h

Moving the TFRC sender and receiver variables to separate structs, so
that we can copy these structs to userspace thru getsockopt,
dccp_diag, etc.

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

2 files changed, 48 insertions, 10 deletions

diff --git a/include/linux/tfrc.h b/include/linux/tfrc.h
new file mode 100644
index 000000000000..7dab7831c3cb
--- /dev/null
+++ b/include/linux/tfrc.h
@@ -0,0 +1,35 @@
+#ifndef _LINUX_TFRC_H_
+#define _LINUX_TFRC_H_
+/*
+ *  include/linux/tfrc.h
+ *
+ *  Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
+ *  Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
+ *  Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *  Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ */
+
+#include <linux/types.h>
+
+struct tfrc_rx_info {
+        __u32 tfrcrx_x_recv;
+        __u32 tfrcrx_rtt;
+        __u32 tfrcrx_p;
+};
+
+struct tfrc_tx_info {
+        __u32 tfrctx_x;
+        __u32 tfrctx_x_recv;
+        __u32 tfrctx_x_calc;
+        __u32 tfrctx_rtt;
+        __u32 tfrctx_p;
+        __u32 tfrctx_rto;
+        __u32 tfrctx_ipi;
+};
+
+#endif /* _LINUX_TFRC_H_ */
diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h
index eb248778eea3..0bde4583d091 100644
--- a/net/dccp/ccids/ccid3.h
+++ b/net/dccp/ccids/ccid3.h
@@ -40,6 +40,7 @@
 #include <linux/list.h>
 #include <linux/time.h>
 #include <linux/types.h>
+#include <linux/tfrc.h>
 
 #define TFRC_MIN_PACKET_SIZE       16
 #define TFRC_STD_PACKET_SIZE      256
@@ -93,12 +94,15 @@ struct ccid3_options_received {
   * @ccid3hctx_hist - Packet history
   */
 struct ccid3_hc_tx_sock {
-        u32                             ccid3hctx_x;
-        u32                             ccid3hctx_x_recv;
-        u32                             ccid3hctx_x_calc;
+        struct tfrc_tx_info             ccid3hctx_tfrc;
+#define ccid3hctx_x                     ccid3hctx_tfrc.tfrctx_x
+#define ccid3hctx_x_recv                ccid3hctx_tfrc.tfrctx_x_recv
+#define ccid3hctx_x_calc                ccid3hctx_tfrc.tfrctx_x_calc
+#define ccid3hctx_rtt                   ccid3hctx_tfrc.tfrctx_rtt
+#define ccid3hctx_p                     ccid3hctx_tfrc.tfrctx_p
+#define ccid3hctx_t_rto                 ccid3hctx_tfrc.tfrctx_rto
+#define ccid3hctx_t_ipi                 ccid3hctx_tfrc.tfrctx_ipi
         u16                             ccid3hctx_s;
-        u32                             ccid3hctx_rtt;
-        u32                             ccid3hctx_p;
         u8                              ccid3hctx_state;
         u8                              ccid3hctx_last_win_count;
         u8                              ccid3hctx_idle;
@@ -106,19 +110,19 @@ struct ccid3_hc_tx_sock {
         struct timer_list               ccid3hctx_no_feedback_timer;
         struct timeval                  ccid3hctx_t_ld;
         struct timeval                  ccid3hctx_t_nom;
-        u32                             ccid3hctx_t_rto;
-        u32                             ccid3hctx_t_ipi;
         u32                             ccid3hctx_delta;
         struct list_head                ccid3hctx_hist;
         struct ccid3_options_received   ccid3hctx_options_received;
 };
 
 struct ccid3_hc_rx_sock {
+        struct tfrc_rx_info     ccid3hcrx_tfrc;
+#define ccid3hcrx_x_recv        ccid3hcrx_tfrc.tfrcrx_x_recv
+#define ccid3hcrx_rtt           ccid3hcrx_tfrc.tfrcrx_rtt
+#define ccid3hcrx_p             ccid3hcrx_tfrc.tfrcrx_p
         u64                     ccid3hcrx_seqno_last_counter:48,
                                 ccid3hcrx_state:8,
                                 ccid3hcrx_last_counter:4;
-        u32                     ccid3hcrx_rtt;
-        u32                     ccid3hcrx_p;
         u32                     ccid3hcrx_bytes_recv;
         struct timeval          ccid3hcrx_tstamp_last_feedback;
         struct timeval          ccid3hcrx_tstamp_last_ack;
@@ -127,7 +131,6 @@ struct ccid3_hc_rx_sock {
         u16                     ccid3hcrx_s;
         u32                     ccid3hcrx_pinv;
         u32                     ccid3hcrx_elapsed_time;
-        u32                     ccid3hcrx_x_recv;
 };
 
 static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk)