1 /* $KAME: altq_rio.h,v 1.9 2003/07/10 12:07:49 kjc Exp $ */ 2 /* $DragonFly: src/sys/net/altq/altq_rio.h,v 1.1 2005/02/11 22:25:57 joerg Exp $ */ 3 4 /* 5 * Copyright (C) 1998-2003 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 <net/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 /* rio flags */ 42 #define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */ 43 #define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */ 44 #define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6) 45 #define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */ 46 47 #ifdef _KERNEL 48 49 typedef struct rio { 50 /* per drop precedence structure */ 51 struct dropprec_state { 52 /* red parameters */ 53 int inv_pmax; /* inverse of max drop probability */ 54 int th_min; /* red min threshold */ 55 int th_max; /* red max threshold */ 56 57 /* variables for internal use */ 58 int th_min_s; /* th_min scaled by avgshift */ 59 int th_max_s; /* th_max scaled by avgshift */ 60 int probd; /* drop probability denominator */ 61 62 int qlen; /* queue length */ 63 int avg; /* (scaled) queue length average */ 64 int count; /* packet count since the last dropped/ 65 marked packet */ 66 int idle; /* queue was empty */ 67 int old; /* avg is above th_min */ 68 struct timeval last; /* timestamp when queue becomes idle */ 69 } rio_precstate[RIO_NDROPPREC]; 70 71 int rio_wshift; /* log(red_weight) */ 72 int rio_weight; /* weight for EWMA */ 73 struct wtab *rio_wtab; /* weight table */ 74 75 int rio_pkttime; /* average packet time in micro sec 76 used for idle calibration */ 77 int rio_flags; /* rio flags */ 78 79 uint8_t rio_codepoint; /* codepoint value to tag packets */ 80 uint8_t rio_codepointmask; /* codepoint mask bits */ 81 82 struct redstats q_stats[RIO_NDROPPREC]; /* statistics */ 83 } rio_t; 84 85 rio_t *rio_alloc(int, struct redparams *, int, int); 86 void rio_destroy(rio_t *); 87 void rio_getstats(rio_t *, struct redstats *); 88 int rio_addq(rio_t *, class_queue_t *, struct mbuf *, 89 struct altq_pktattr *); 90 struct mbuf *rio_getq(rio_t *, class_queue_t *); 91 92 #endif /* _KERNEL */ 93 94 #endif /* _ALTQ_ALTQ_RIO_H_ */ 95