1 /* $NetBSD: altq_rio.h,v 1.2 2000/12/14 08:49:51 thorpej 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; /* average 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 /* 73 * IOCTLs for RIO 74 */ 75 #define RIO_IF_ATTACH _IOW('Q', 1, struct rio_interface) 76 #define RIO_IF_DETACH _IOW('Q', 2, struct rio_interface) 77 #define RIO_ENABLE _IOW('Q', 3, struct rio_interface) 78 #define RIO_DISABLE _IOW('Q', 4, struct rio_interface) 79 #define RIO_CONFIG _IOWR('Q', 6, struct rio_conf) 80 #define RIO_GETSTATS _IOWR('Q', 12, struct rio_stats) 81 #define RIO_SETDEFAULTS _IOW('Q', 30, struct redparams[RIO_NDROPPREC]) 82 83 #ifdef _KERNEL 84 85 typedef struct rio { 86 /* per drop precedence structure */ 87 struct dropprec_state { 88 /* red parameters */ 89 int inv_pmax; /* inverse of max drop probability */ 90 int th_min; /* red min threshold */ 91 int th_max; /* red max threshold */ 92 93 /* variables for internal use */ 94 int th_min_s; /* th_min scaled by avgshift */ 95 int th_max_s; /* th_max scaled by avgshift */ 96 int probd; /* drop probability denominator */ 97 98 int qlen; /* queue length */ 99 int avg; /* (scaled) queue length average */ 100 int count; /* packet count since the last dropped/marked 101 packet */ 102 int idle; /* queue was empty */ 103 int old; /* avg is above th_min */ 104 struct timeval last; /* timestamp when queue becomes idle */ 105 } rio_precstate[RIO_NDROPPREC]; 106 107 int rio_wshift; /* log(red_weight) */ 108 int rio_weight; /* weight for EWMA */ 109 struct wtab *rio_wtab; /* weight table */ 110 111 int rio_pkttime; /* average packet time in micro sec 112 used for idle calibration */ 113 int rio_flags; /* rio flags */ 114 115 u_int8_t rio_codepoint; /* codepoint value to tag packets */ 116 u_int8_t rio_codepointmask; /* codepoint mask bits */ 117 118 struct redstats q_stats[RIO_NDROPPREC]; /* statistics */ 119 } rio_t; 120 121 typedef struct rio_queue { 122 struct rio_queue *rq_next; /* next red_state in the list */ 123 struct ifaltq *rq_ifq; /* backpointer to ifaltq */ 124 125 class_queue_t *rq_q; 126 127 rio_t *rq_rio; 128 } rio_queue_t; 129 130 extern rio_t *rio_alloc __P((int, struct redparams *, int, int)); 131 extern void rio_destroy __P((rio_t *)); 132 extern void rio_getstats __P((rio_t *, struct redstats *)); 133 extern int rio_addq __P((rio_t *, class_queue_t *, struct mbuf *, 134 struct altq_pktattr *)); 135 extern struct mbuf *rio_getq __P((rio_t *, class_queue_t *)); 136 extern int rio_set_meter __P((rio_t *, int, int, int)); 137 138 #endif /* _KERNEL */ 139 140 #endif /* _ALTQ_ALTQ_RIO_H_ */ 141