altq_red.h revision 1.3
1 /* $NetBSD: altq_red.h,v 1.3 2005/02/26 23:04:16 perry Exp $ */ 2 /* $KAME: altq_red.h,v 1.5 2000/12/14 08:12:46 thorpej Exp $ */ 3 4 /* 5 * Copyright (C) 1997-2000 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_RED_H_ 31 #define _ALTQ_ALTQ_RED_H_ 32 33 #include <altq/altq_classq.h> 34 35 struct red_interface { 36 char red_ifname[IFNAMSIZ]; 37 }; 38 39 struct red_stats { 40 struct red_interface iface; 41 int q_len; 42 int q_avg; 43 44 struct pktcntr xmit_cnt; 45 struct pktcntr drop_cnt; 46 u_int drop_forced; 47 u_int drop_unforced; 48 u_int marked_packets; 49 50 /* static red parameters */ 51 int q_limit; 52 int weight; 53 int inv_pmax; 54 int th_min; 55 int th_max; 56 57 /* flowvalve related stuff */ 58 u_int fv_flows; 59 u_int fv_pass; 60 u_int fv_predrop; 61 u_int fv_alloc; 62 u_int fv_escape; 63 }; 64 65 struct red_conf { 66 struct red_interface iface; 67 int red_weight; /* weight for EWMA */ 68 int red_inv_pmax; /* inverse of max drop probability */ 69 int red_thmin; /* red min threshold */ 70 int red_thmax; /* red max threshold */ 71 int red_limit; /* max queue length */ 72 int red_pkttime; /* average packet time in usec */ 73 int red_flags; /* see below */ 74 }; 75 76 /* red flags */ 77 #define REDF_ECN4 0x01 /* use packet marking for IPv4 packets */ 78 #define REDF_ECN6 0x02 /* use packet marking for IPv6 packets */ 79 #define REDF_ECN (REDF_ECN4 | REDF_ECN6) 80 #define REDF_FLOWVALVE 0x04 /* use flowvalve (aka penalty-box) */ 81 82 /* 83 * simpler versions of red parameters and statistics used by other 84 * disciplines (e.g., CBQ) 85 */ 86 struct redparams { 87 int th_min; /* red min threshold */ 88 int th_max; /* red max threshold */ 89 int inv_pmax; /* inverse of max drop probability */ 90 }; 91 92 struct redstats { 93 int q_avg; 94 struct pktcntr xmit_cnt; 95 struct pktcntr drop_cnt; 96 u_int drop_forced; 97 u_int drop_unforced; 98 u_int marked_packets; 99 }; 100 101 102 /* 103 * IOCTLs for RED 104 */ 105 #define RED_IF_ATTACH _IOW('Q', 1, struct red_interface) 106 #define RED_IF_DETACH _IOW('Q', 2, struct red_interface) 107 #define RED_ENABLE _IOW('Q', 3, struct red_interface) 108 #define RED_DISABLE _IOW('Q', 4, struct red_interface) 109 #define RED_CONFIG _IOWR('Q', 6, struct red_conf) 110 #define RED_GETSTATS _IOWR('Q', 12, struct red_stats) 111 #define RED_SETDEFAULTS _IOW('Q', 30, struct redparams) 112 113 #ifdef _KERNEL 114 115 struct flowvalve; 116 117 /* weight table structure for idle time calibration */ 118 struct wtab { 119 struct wtab *w_next; 120 int w_weight; 121 int w_param_max; 122 int w_refcount; 123 int32_t w_tab[32]; 124 }; 125 126 typedef struct red { 127 int red_pkttime; /* average packet time in micro sec 128 used for idle calibration */ 129 int red_flags; /* red flags */ 130 131 /* red parameters */ 132 int red_weight; /* weight for EWMA */ 133 int red_inv_pmax; /* inverse of max drop probability */ 134 int red_thmin; /* red min threshold */ 135 int red_thmax; /* red max threshold */ 136 137 /* variables for internal use */ 138 int red_wshift; /* log(red_weight) */ 139 int red_thmin_s; /* th_min scaled by avgshift */ 140 int red_thmax_s; /* th_max scaled by avgshift */ 141 int red_probd; /* drop probability denominator */ 142 143 int red_avg; /* queue length average scaled by avgshift */ 144 int red_count; /* packet count since the last dropped/marked 145 packet */ 146 int red_idle; /* queue was empty */ 147 int red_old; /* avg is above th_min */ 148 struct wtab *red_wtab; /* weight table */ 149 struct timeval red_last; /* timestamp when the queue becomes idle */ 150 151 struct flowvalve *red_flowvalve; /* flowvalve state */ 152 153 struct { 154 struct pktcntr xmit_cnt; 155 struct pktcntr drop_cnt; 156 u_int drop_forced; 157 u_int drop_unforced; 158 u_int marked_packets; 159 } red_stats; 160 } red_t; 161 162 typedef struct red_queue { 163 struct red_queue *rq_next; /* next red_state in the list */ 164 struct ifaltq *rq_ifq; /* backpointer to ifaltq */ 165 166 class_queue_t *rq_q; 167 168 red_t *rq_red; 169 } red_queue_t; 170 171 /* red drop types */ 172 #define DTYPE_NODROP 0 /* no drop */ 173 #define DTYPE_FORCED 1 /* a "forced" drop */ 174 #define DTYPE_EARLY 2 /* an "unforced" (early) drop */ 175 176 extern red_t *red_alloc __P((int, int, int, int, int, int)); 177 extern void red_destroy __P((red_t *)); 178 extern void red_getstats __P((red_t *, struct redstats *)); 179 extern int red_addq __P((red_t *, class_queue_t *, struct mbuf *, 180 struct altq_pktattr *)); 181 extern struct mbuf *red_getq __P((red_t *, class_queue_t *)); 182 extern int drop_early __P((int, int, int)); 183 extern int mark_ecn __P((struct mbuf *, struct altq_pktattr *, int)); 184 extern struct wtab *wtab_alloc __P((int)); 185 extern int wtab_destroy __P((struct wtab *)); 186 extern int32_t pow_w __P((struct wtab *, int)); 187 188 #endif /* _KERNEL */ 189 190 #endif /* _ALTQ_ALTQ_RED_H_ */ 191
Indexes created Mon Sep 29 21:09:56 GMT 2025