/*- * Copyright (C) 1998-2003 * Sony Computer Science Laboratories Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $KAME: altq_rio.h,v 1.9 2003/07/10 12:07:49 kjc Exp $ * $FreeBSD$ */ #ifndef _ALTQ_ALTQ_RIO_H_ #define _ALTQ_ALTQ_RIO_H_ #include <net/altq/altq_classq.h> /* * RIO: RED with IN/OUT bit * (extended to support more than 2 drop precedence values) */ #define RIO_NDROPPREC 3 /* number of drop precedence values */ /* rio flags */ #define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */ #define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */ #define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6) #define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */ #ifdef _KERNEL typedef struct rio { /* per drop precedence structure */ struct dropprec_state { /* red parameters */ int inv_pmax; /* inverse of max drop probability */ int th_min; /* red min threshold */ int th_max; /* red max threshold */ /* variables for internal use */ int th_min_s; /* th_min scaled by avgshift */ int th_max_s; /* th_max scaled by avgshift */ int probd; /* drop probability denominator */ int qlen; /* queue length */ int avg; /* (scaled) queue length average */ int count; /* packet count since the last dropped/ marked packet */ int idle; /* queue was empty */ int old; /* avg is above th_min */ struct timeval last; /* timestamp when queue becomes idle */ } rio_precstate[RIO_NDROPPREC]; int rio_wshift; /* log(red_weight) */ int rio_weight; /* weight for EWMA */ struct wtab *rio_wtab; /* weight table */ int rio_pkttime; /* average packet time in micro sec used for idle calibration */ int rio_flags; /* rio flags */ u_int8_t rio_codepoint; /* codepoint value to tag packets */ u_int8_t rio_codepointmask; /* codepoint mask bits */ struct redstats q_stats[RIO_NDROPPREC]; /* statistics */ } rio_t; extern rio_t *rio_alloc(int, struct redparams *, int, int); extern void rio_destroy(rio_t *); extern void rio_getstats(rio_t *, struct redstats *); extern int rio_addq(rio_t *, class_queue_t *, struct mbuf *, struct altq_pktattr *); extern struct mbuf *rio_getq(rio_t *, class_queue_t *); #endif /* _KERNEL */ #endif /* _ALTQ_ALTQ_RIO_H_ */ |