Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / tfrc.h

diff --git a/kernel/include/linux/tfrc.h b/kernel/include/linux/tfrc.h
new file mode 100644 (file)
index 0000000..8a8462b
--- /dev/null
+++ b/kernel/include/linux/tfrc.h
@@ -0,0 +1,55 @@
+#ifndef _LINUX_TFRC_H_
+#define _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>
+ *  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>
+
+/**    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)
+ *
+ *  Note: X and X_recv are both maintained in units of 64 * bytes/second. This
+ *        enables a finer resolution of sending rates and avoids problems with
+ *        integer arithmetic; u32 is not sufficient as scaling consumes 6 bits.
+ */
+struct tfrc_tx_info {
+       __u64 tfrctx_x;
+       __u64 tfrctx_x_recv;
+       __u32 tfrctx_x_calc;
+       __u32 tfrctx_rtt;
+       __u32 tfrctx_p;
+       __u32 tfrctx_rto;
+       __u32 tfrctx_ipi;
+};
+
+#endif /* _LINUX_TFRC_H_ */