--- /dev/null
+/*
+ * 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_ */
projects / apple / xnu.git / blobdiff