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-rw-r--r--sys/contrib/altq/altq/altq_rio.h144
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+/* $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 _ALTQ_ALTQ_RIO_H_
+#define _ALTQ_ALTQ_RIO_H_
+
+#include <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 */
+
+#ifdef ALTQ3_COMPAT
+struct rio_interface {
+ char rio_ifname[IFNAMSIZ];
+};
+
+struct rio_stats {
+ struct rio_interface iface;
+ int q_len[RIO_NDROPPREC];
+ struct redstats q_stats[RIO_NDROPPREC];
+
+ /* static red parameters */
+ int q_limit;
+ int weight;
+ int flags;
+ struct redparams q_params[RIO_NDROPPREC];
+};
+
+struct rio_conf {
+ struct rio_interface iface;
+ struct redparams q_params[RIO_NDROPPREC];
+ int rio_weight; /* weight for EWMA */
+ int rio_limit; /* max queue length */
+ int rio_pkttime; /* average packet time in usec */
+ int rio_flags; /* see below */
+};
+#endif /* ALTQ3_COMPAT */
+
+/* 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 ALTQ3_COMPAT
+/*
+ * IOCTLs for RIO
+ */
+#define RIO_IF_ATTACH _IOW('Q', 1, struct rio_interface)
+#define RIO_IF_DETACH _IOW('Q', 2, struct rio_interface)
+#define RIO_ENABLE _IOW('Q', 3, struct rio_interface)
+#define RIO_DISABLE _IOW('Q', 4, struct rio_interface)
+#define RIO_CONFIG _IOWR('Q', 6, struct rio_conf)
+#define RIO_GETSTATS _IOWR('Q', 12, struct rio_stats)
+#define RIO_SETDEFAULTS _IOW('Q', 30, struct redparams[RIO_NDROPPREC])
+#endif /* ALTQ3_COMPAT */
+
+#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;
+
+#ifdef ALTQ3_COMPAT
+typedef struct rio_queue {
+ struct rio_queue *rq_next; /* next red_state in the list */
+ struct ifaltq *rq_ifq; /* backpointer to ifaltq */
+
+ class_queue_t *rq_q;
+
+ rio_t *rq_rio;
+} rio_queue_t;
+#endif /* ALTQ3_COMPAT */
+
+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_ */