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Diffstat (limited to 'kernel/include/linux/tfrc.h')
| -rw-r--r-- | kernel/include/linux/tfrc.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/kernel/include/linux/tfrc.h b/kernel/include/linux/tfrc.h new file mode 100644 index 000000000..8a8462b4a --- /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_ */ |