X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/13f56ec4e58bf8687e2a68032c093c0213dd519b..316670eb35587141e969394ae8537d66b9211e80:/bsd/net/classq/classq_rio.h diff --git a/bsd/net/classq/classq_rio.h b/bsd/net/classq/classq_rio.h new file mode 100644 index 000000000..fb3c24199 --- /dev/null +++ b/bsd/net/classq/classq_rio.h @@ -0,0 +1,139 @@ +/* + * 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 +#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_ */