[NET]: Add documentation for TFRC structures

This adds documentation for the TFRC structure fields.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>

1 files changed, 18 insertions, 2 deletions

diff --git a/include/linux/tfrc.h b/include/linux/tfrc.h
index 7dab7831c3cb..31a9b25276fe 100644
--- a/include/linux/tfrc.h
+++ b/include/linux/tfrc.h
@@ -1,7 +1,8 @@
 #ifndef _LINUX_TFRC_H_
 #define _LINUX_TFRC_H_
 /*
- *  include/linux/tfrc.h
+ *  TFRC - Data Structures for the TCP-Friendly Rate Control congestion
+ *         control mechanism as specified in RFC 3448.
  *
  *  Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
  *  Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
@@ -13,15 +14,30 @@
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  */
-
 #include <linux/types.h>
 
+/**     tfrc_rx_info    -    TFRC Receiver Data Structure
+ *
+ *      @tfrcrx_x_recv: receiver estimate of sending rate (3.2.2)
+ *      @tfrcrx_rtt:    round-trip-time (communicated by sender)
+ *      @tfrcrx_p:      current estimate of loss event rate (3.2.2)
+ */
 struct tfrc_rx_info {
         __u32 tfrcrx_x_recv;
         __u32 tfrcrx_rtt;
         __u32 tfrcrx_p;
 };
 
+/**     tfrc_tx_info    -    TFRC Sender Data Structure
+ *
+ *      @tfrctx_x:      computed transmit rate (4.3 (4))
+ *      @tfrctx_x_recv: receiver estimate of send rate (4.3)
+ *      @tfrctx_x_calc: return value of throughput equation (3.1)
+ *      @tfrctx_rtt:    (moving average) estimate of RTT (4.3)
+ *      @tfrctx_p:      current loss event rate (5.4)
+ *      @tfrctx_rto:    estimate of RTO, equals 4*RTT (4.3)
+ *      @tfrctx_ipi:    inter-packet interval (4.6)
+ */
 struct tfrc_tx_info {
         __u32 tfrctx_x;
         __u32 tfrctx_x_recv;