Annotation of sys/altq/altq_rio.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: altq_rio.h,v 1.6 2003/03/13 16:33:46 kjc Exp $ */
! 2: /* $KAME: altq_rio.h,v 1.5 2000/12/14 08:12:46 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (C) 1998-2000
! 6: * Sony Computer Science Laboratories Inc. All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #ifndef _ALTQ_ALTQ_RIO_H_
! 31: #define _ALTQ_ALTQ_RIO_H_
! 32:
! 33: #include <altq/altq_classq.h>
! 34:
! 35: /*
! 36: * RIO: RED with IN/OUT bit
! 37: * (extended to support more than 2 drop precedence values)
! 38: */
! 39: #define RIO_NDROPPREC 3 /* number of drop precedence values */
! 40:
! 41: struct rio_interface {
! 42: char rio_ifname[IFNAMSIZ];
! 43: };
! 44:
! 45: struct rio_stats {
! 46: struct rio_interface iface;
! 47: int q_len[RIO_NDROPPREC];
! 48: struct redstats q_stats[RIO_NDROPPREC];
! 49:
! 50: /* static red parameters */
! 51: int q_limit;
! 52: int weight;
! 53: int flags;
! 54: struct redparams q_params[RIO_NDROPPREC];
! 55: };
! 56:
! 57: struct rio_conf {
! 58: struct rio_interface iface;
! 59: struct redparams q_params[RIO_NDROPPREC];
! 60: int rio_weight; /* weight for EWMA */
! 61: int rio_limit; /* max queue length */
! 62: int rio_pkttime; /* avg packet time in usec */
! 63: int rio_flags; /* see below */
! 64: };
! 65:
! 66: /* rio flags */
! 67: #define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */
! 68: #define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */
! 69: #define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6)
! 70: #define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */
! 71:
! 72: #ifdef _KERNEL
! 73:
! 74: typedef struct rio {
! 75: /* per drop precedence structure */
! 76: struct dropprec_state {
! 77: /* red parameters */
! 78: int inv_pmax; /* inverse of max drop probability */
! 79: int th_min; /* red min threshold */
! 80: int th_max; /* red max threshold */
! 81:
! 82: /* variables for internal use */
! 83: int th_min_s; /* th_min scaled by avgshift */
! 84: int th_max_s; /* th_max scaled by avgshift */
! 85: int probd; /* drop probability denominator */
! 86:
! 87: int qlen; /* queue length */
! 88: int avg; /* (scaled) queue length average */
! 89: int count; /* packet count since the last dropped/
! 90: marked packet */
! 91: int idle; /* queue was empty */
! 92: int old; /* avg is above th_min */
! 93: struct timeval last; /* timestamp when queue becomes idle */
! 94: } rio_precstate[RIO_NDROPPREC];
! 95:
! 96: int rio_wshift; /* log(red_weight) */
! 97: int rio_weight; /* weight for EWMA */
! 98: struct wtab *rio_wtab; /* weight table */
! 99:
! 100: int rio_pkttime; /* average packet time in micro sec
! 101: used for idle calibration */
! 102: int rio_flags; /* rio flags */
! 103:
! 104: u_int8_t rio_codepoint; /* codepoint value to tag packets */
! 105: u_int8_t rio_codepointmask; /* codepoint mask bits */
! 106:
! 107: struct redstats q_stats[RIO_NDROPPREC]; /* statistics */
! 108: } rio_t;
! 109:
! 110: typedef struct rio_queue {
! 111: struct rio_queue *rq_next; /* next red_state in the list */
! 112: struct ifaltq *rq_ifq; /* backpointer to ifaltq */
! 113:
! 114: class_queue_t *rq_q;
! 115:
! 116: rio_t *rq_rio;
! 117: } rio_queue_t;
! 118:
! 119: extern rio_t *rio_alloc(int, struct redparams *, int, int);
! 120: extern void rio_destroy(rio_t *);
! 121: extern void rio_getstats(rio_t *, struct redstats *);
! 122: extern int rio_addq(rio_t *, class_queue_t *, struct mbuf *,
! 123: struct altq_pktattr *);
! 124: extern struct mbuf *rio_getq(rio_t *, class_queue_t *);
! 125:
! 126: #endif /* _KERNEL */
! 127:
! 128: #endif /* _ALTQ_ALTQ_RIO_H_ */
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