2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _LINUX_TFRC_H_
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#define _LINUX_TFRC_H_
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/*
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* TFRC - Data Structures for the TCP-Friendly Rate Control congestion
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* control mechanism as specified in RFC 3448.
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*
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* Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
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* Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
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* Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
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* Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
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*/
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#include <linux/types.h>
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/** tfrc_rx_info - TFRC Receiver Data Structure
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*
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* @tfrcrx_x_recv: receiver estimate of sending rate (3.2.2)
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* @tfrcrx_rtt: round-trip-time (communicated by sender)
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* @tfrcrx_p: current estimate of loss event rate (3.2.2)
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*/
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struct tfrc_rx_info {
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__u32 tfrcrx_x_recv;
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__u32 tfrcrx_rtt;
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__u32 tfrcrx_p;
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};
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/** tfrc_tx_info - TFRC Sender Data Structure
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*
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* @tfrctx_x: computed transmit rate (4.3 (4))
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* @tfrctx_x_recv: receiver estimate of send rate (4.3)
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* @tfrctx_x_calc: return value of throughput equation (3.1)
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* @tfrctx_rtt: (moving average) estimate of RTT (4.3)
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* @tfrctx_p: current loss event rate (5.4)
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* @tfrctx_rto: estimate of RTO, equals 4*RTT (4.3)
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* @tfrctx_ipi: inter-packet interval (4.6)
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*
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* Note: X and X_recv are both maintained in units of 64 * bytes/second. This
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* enables a finer resolution of sending rates and avoids problems with
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* integer arithmetic; u32 is not sufficient as scaling consumes 6 bits.
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*/
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struct tfrc_tx_info {
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__u64 tfrctx_x;
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__u64 tfrctx_x_recv;
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__u32 tfrctx_x_calc;
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__u32 tfrctx_rtt;
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__u32 tfrctx_p;
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__u32 tfrctx_rto;
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__u32 tfrctx_ipi;
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};
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#endif /* _LINUX_TFRC_H_ */
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