141 lines
4.7 KiB
C
141 lines
4.7 KiB
C
/* $NetBSD: altq_rio.h,v 1.4 2005/12/11 12:16:03 christos Exp $ */
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/* $KAME: altq_rio.h,v 1.5 2000/12/14 08:12:46 thorpej Exp $ */
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/*
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* Copyright (C) 1998-2000
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* Sony Computer Science Laboratories Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _ALTQ_ALTQ_RIO_H_
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#define _ALTQ_ALTQ_RIO_H_
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#include <altq/altq_classq.h>
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/*
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* RIO: RED with IN/OUT bit
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* (extended to support more than 2 drop precedence values)
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*/
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#define RIO_NDROPPREC 3 /* number of drop precedence values */
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struct rio_interface {
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char rio_ifname[IFNAMSIZ];
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};
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struct rio_stats {
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struct rio_interface iface;
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int q_len[RIO_NDROPPREC];
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struct redstats q_stats[RIO_NDROPPREC];
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/* static red parameters */
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int q_limit;
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int weight;
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int flags;
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struct redparams q_params[RIO_NDROPPREC];
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};
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struct rio_conf {
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struct rio_interface iface;
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struct redparams q_params[RIO_NDROPPREC];
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int rio_weight; /* weight for EWMA */
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int rio_limit; /* max queue length */
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int rio_pkttime; /* average packet time in usec */
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int rio_flags; /* see below */
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};
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/* rio flags */
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#define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */
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#define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */
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#define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6)
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#define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */
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/*
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* IOCTLs for RIO
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*/
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#define RIO_IF_ATTACH _IOW('Q', 1, struct rio_interface)
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#define RIO_IF_DETACH _IOW('Q', 2, struct rio_interface)
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#define RIO_ENABLE _IOW('Q', 3, struct rio_interface)
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#define RIO_DISABLE _IOW('Q', 4, struct rio_interface)
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#define RIO_CONFIG _IOWR('Q', 6, struct rio_conf)
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#define RIO_GETSTATS _IOWR('Q', 12, struct rio_stats)
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#define RIO_SETDEFAULTS _IOW('Q', 30, struct redparams[RIO_NDROPPREC])
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#ifdef _KERNEL
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typedef struct rio {
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/* per drop precedence structure */
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struct dropprec_state {
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/* red parameters */
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int inv_pmax; /* inverse of max drop probability */
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int th_min; /* red min threshold */
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int th_max; /* red max threshold */
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/* variables for internal use */
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int th_min_s; /* th_min scaled by avgshift */
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int th_max_s; /* th_max scaled by avgshift */
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int probd; /* drop probability denominator */
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int qlen; /* queue length */
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int avg; /* (scaled) queue length average */
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int count; /* packet count since the last dropped/marked
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packet */
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int idle; /* queue was empty */
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int old; /* avg is above th_min */
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struct timeval last; /* timestamp when queue becomes idle */
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} rio_precstate[RIO_NDROPPREC];
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int rio_wshift; /* log(red_weight) */
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int rio_weight; /* weight for EWMA */
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struct wtab *rio_wtab; /* weight table */
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int rio_pkttime; /* average packet time in micro sec
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used for idle calibration */
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int rio_flags; /* rio flags */
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u_int8_t rio_codepoint; /* codepoint value to tag packets */
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u_int8_t rio_codepointmask; /* codepoint mask bits */
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struct redstats q_stats[RIO_NDROPPREC]; /* statistics */
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} rio_t;
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typedef struct rio_queue {
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struct rio_queue *rq_next; /* next red_state in the list */
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struct ifaltq *rq_ifq; /* backpointer to ifaltq */
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class_queue_t *rq_q;
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rio_t *rq_rio;
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} rio_queue_t;
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extern rio_t *rio_alloc __P((int, struct redparams *, int, int));
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extern void rio_destroy __P((rio_t *));
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extern void rio_getstats __P((rio_t *, struct redstats *));
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extern int rio_addq __P((rio_t *, class_queue_t *, struct mbuf *,
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struct altq_pktattr *));
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extern struct mbuf *rio_getq __P((rio_t *, class_queue_t *));
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extern int rio_set_meter __P((rio_t *, int, int, int));
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#endif /* _KERNEL */
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#endif /* _ALTQ_ALTQ_RIO_H_ */
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