1 /*- 2 * Copyright (C) 1998-2003 3 * Sony Computer Science Laboratories Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $KAME: altq_rio.h,v 1.9 2003/07/10 12:07:49 kjc Exp $ 27 */ 28 29 #ifndef _ALTQ_ALTQ_RIO_H_ 30 #define _ALTQ_ALTQ_RIO_H_ 31 32 #include <net/altq/altq_classq.h> 33 34 /* 35 * RIO: RED with IN/OUT bit 36 * (extended to support more than 2 drop precedence values) 37 */ 38 #define RIO_NDROPPREC 3 /* number of drop precedence values */ 39 40 /* rio flags */ 41 #define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */ 42 #define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */ 43 #define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6) 44 #define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */ 45 46 #ifdef _KERNEL 47 48 typedef struct rio { 49 /* per drop precedence structure */ 50 struct dropprec_state { 51 /* red parameters */ 52 int inv_pmax; /* inverse of max drop probability */ 53 int th_min; /* red min threshold */ 54 int th_max; /* red max threshold */ 55 56 /* variables for internal use */ 57 int th_min_s; /* th_min scaled by avgshift */ 58 int th_max_s; /* th_max scaled by avgshift */ 59 int probd; /* drop probability denominator */ 60 61 int qlen; /* queue length */ 62 int avg; /* (scaled) queue length average */ 63 int count; /* packet count since the last dropped/ 64 marked packet */ 65 int idle; /* queue was empty */ 66 int old; /* avg is above th_min */ 67 struct timeval last; /* timestamp when queue becomes idle */ 68 } rio_precstate[RIO_NDROPPREC]; 69 70 int rio_wshift; /* log(red_weight) */ 71 int rio_weight; /* weight for EWMA */ 72 struct wtab *rio_wtab; /* weight table */ 73 74 int rio_pkttime; /* average packet time in micro sec 75 used for idle calibration */ 76 int rio_flags; /* rio flags */ 77 78 u_int8_t rio_codepoint; /* codepoint value to tag packets */ 79 u_int8_t rio_codepointmask; /* codepoint mask bits */ 80 81 struct redstats q_stats[RIO_NDROPPREC]; /* statistics */ 82 } rio_t; 83 84 extern rio_t *rio_alloc(int, struct redparams *, int, int); 85 extern void rio_destroy(rio_t *); 86 extern void rio_getstats(rio_t *, struct redstats *); 87 extern int rio_addq(rio_t *, class_queue_t *, struct mbuf *, 88 struct altq_pktattr *); 89 extern struct mbuf *rio_getq(rio_t *, class_queue_t *); 90 91 #endif /* _KERNEL */ 92 93 #endif /* _ALTQ_ALTQ_RIO_H_ */ 94