/* * Copyright (c) 2011-2012 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* $NetBSD: altq_rio.h,v 1.5 2006/10/12 19:59:08 peter Exp $ */ /* $KAME: altq_rio.h,v 1.9 2003/07/10 12:07:49 kjc Exp $ */ /* * 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. */ #ifndef _NET_CLASSQ_CLASSQ_RIO_H_ #define _NET_CLASSQ_CLASSQ_RIO_H_ #ifdef PRIVATE #ifdef BSD_KERNEL_PRIVATE #include <net/classq/if_classq.h> #endif /* BSD_KERNEL_PRIVATE */ #ifdef __cplusplus extern "C" { #endif /* * RIO: RED with IN/OUT bit * (extended to support more than 2 drop precedence values) */ #define RIO_NDROPPREC 3 /* number of drop precedence values */ #ifdef BSD_KERNEL_PRIVATE /* 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 */ #define RIOF_USERFLAGS \ (RIOF_ECN4 | RIOF_ECN6 | RIOF_CLEARDSCP) 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 */ struct ifnet *rio_ifp; /* back pointer to ifnet */ u_int8_t rio_codepoint; /* codepoint value to tag packets */ u_int8_t rio_codepointmask; /* codepoint mask bits */ struct red_stats q_stats[RIO_NDROPPREC]; /* statistics */ } rio_t; extern void rio_init(void); extern rio_t *rio_alloc(struct ifnet *, int, struct redparams *, int, int); extern void rio_destroy(rio_t *); extern void rio_getstats(rio_t *, struct red_stats *); extern int rio_addq(rio_t *, class_queue_t *, struct mbuf *, struct pf_mtag *); extern struct mbuf *rio_getq(rio_t *, class_queue_t *); extern void rio_purgeq(struct rio *, class_queue_t *, u_int32_t, u_int32_t *, u_int32_t *); extern void rio_updateq(rio_t *, cqev_t); extern int rio_suspendq(rio_t *, class_queue_t *, boolean_t); #endif /* BSD_KERNEL_PRIVATE */ #ifdef __cplusplus } #endif #endif /* PRIVATE */ #endif /* _NET_CLASSQ_CLASSQ_RIO_H_ */