altq_red.h revision 1.1
1 /* $KAME: altq_red.h,v 1.5 2000/12/14 08:12:46 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1997-2000 5 * Sony Computer Science Laboratories Inc. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _ALTQ_ALTQ_RED_H_ 30 #define _ALTQ_ALTQ_RED_H_ 31 32 #include <altq/altq_classq.h> 33 34 struct red_interface { 35 char red_ifname[IFNAMSIZ]; 36 }; 37 38 struct red_stats { 39 struct red_interface iface; 40 int q_len; 41 int q_avg; 42 43 struct pktcntr xmit_cnt; 44 struct pktcntr drop_cnt; 45 u_int drop_forced; 46 u_int drop_unforced; 47 u_int marked_packets; 48 49 /* static red parameters */ 50 int q_limit; 51 int weight; 52 int inv_pmax; 53 int th_min; 54 int th_max; 55 56 /* flowvalve related stuff */ 57 u_int fv_flows; 58 u_int fv_pass; 59 u_int fv_predrop; 60 u_int fv_alloc; 61 u_int fv_escape; 62 }; 63 64 struct red_conf { 65 struct red_interface iface; 66 int red_weight; /* weight for EWMA */ 67 int red_inv_pmax; /* inverse of max drop probability */ 68 int red_thmin; /* red min threshold */ 69 int red_thmax; /* red max threshold */ 70 int red_limit; /* max queue length */ 71 int red_pkttime; /* average packet time in usec */ 72 int red_flags; /* see below */ 73 }; 74 75 /* red flags */ 76 #define REDF_ECN4 0x01 /* use packet marking for IPv4 packets */ 77 #define REDF_ECN6 0x02 /* use packet marking for IPv6 packets */ 78 #define REDF_ECN (REDF_ECN4 | REDF_ECN6) 79 #define REDF_FLOWVALVE 0x04 /* use flowvalve (aka penalty-box) */ 80 81 /* 82 * simpler versions of red parameters and statistics used by other 83 * disciplines (e.g., CBQ) 84 */ 85 struct redparams { 86 int th_min; /* red min threshold */ 87 int th_max; /* red max threshold */ 88 int inv_pmax; /* inverse of max drop probability */ 89 }; 90 91 struct redstats { 92 int q_avg; 93 struct pktcntr xmit_cnt; 94 struct pktcntr drop_cnt; 95 u_int drop_forced; 96 u_int drop_unforced; 97 u_int marked_packets; 98 }; 99 100 101 /* 102 * IOCTLs for RED 103 */ 104 #define RED_IF_ATTACH _IOW('Q', 1, struct red_interface) 105 #define RED_IF_DETACH _IOW('Q', 2, struct red_interface) 106 #define RED_ENABLE _IOW('Q', 3, struct red_interface) 107 #define RED_DISABLE _IOW('Q', 4, struct red_interface) 108 #define RED_CONFIG _IOWR('Q', 6, struct red_conf) 109 #define RED_GETSTATS _IOWR('Q', 12, struct red_stats) 110 #define RED_SETDEFAULTS _IOW('Q', 30, struct redparams) 111 112 #ifdef _KERNEL 113 114 struct flowvalve; 115 116 /* weight table structure for idle time calibration */ 117 struct wtab { 118 struct wtab *w_next; 119 int w_weight; 120 int w_param_max; 121 int w_refcount; 122 int32_t w_tab[32]; 123 }; 124 125 typedef struct red { 126 int red_pkttime; /* average packet time in micro sec 127 used for idle calibration */ 128 int red_flags; /* red flags */ 129 130 /* red parameters */ 131 int red_weight; /* weight for EWMA */ 132 int red_inv_pmax; /* inverse of max drop probability */ 133 int red_thmin; /* red min threshold */ 134 int red_thmax; /* red max threshold */ 135 136 /* variables for internal use */ 137 int red_wshift; /* log(red_weight) */ 138 int red_thmin_s; /* th_min scaled by avgshift */ 139 int red_thmax_s; /* th_max scaled by avgshift */ 140 int red_probd; /* drop probability denominator */ 141 142 int red_avg; /* queue length average scaled by avgshift */ 143 int red_count; /* packet count since the last dropped/marked 144 packet */ 145 int red_idle; /* queue was empty */ 146 int red_old; /* avg is above th_min */ 147 struct wtab *red_wtab; /* weight table */ 148 struct timeval red_last; /* timestamp when the queue becomes idle */ 149 150 struct flowvalve *red_flowvalve; /* flowvalve state */ 151 152 struct { 153 struct pktcntr xmit_cnt; 154 struct pktcntr drop_cnt; 155 u_int drop_forced; 156 u_int drop_unforced; 157 u_int marked_packets; 158 } red_stats; 159 } red_t; 160 161 typedef struct red_queue { 162 struct red_queue *rq_next; /* next red_state in the list */ 163 struct ifaltq *rq_ifq; /* backpointer to ifaltq */ 164 165 class_queue_t *rq_q; 166 167 red_t *rq_red; 168 } red_queue_t; 169 170 /* red drop types */ 171 #define DTYPE_NODROP 0 /* no drop */ 172 #define DTYPE_FORCED 1 /* a "forced" drop */ 173 #define DTYPE_EARLY 2 /* an "unforced" (early) drop */ 174 175 extern red_t *red_alloc __P((int, int, int, int, int, int)); 176 extern void red_destroy __P((red_t *)); 177 extern void red_getstats __P((red_t *, struct redstats *)); 178 extern int red_addq __P((red_t *, class_queue_t *, struct mbuf *, 179 struct altq_pktattr *)); 180 extern struct mbuf *red_getq __P((red_t *, class_queue_t *)); 181 extern int drop_early __P((int, int, int)); 182 extern int mark_ecn __P((struct mbuf *, struct altq_pktattr *, int)); 183 extern struct wtab *wtab_alloc __P((int)); 184 extern int wtab_destroy __P((struct wtab *)); 185 extern int32_t pow_w __P((struct wtab *, int)); 186 187 #endif /* _KERNEL */ 188 189 #endif /* _ALTQ_ALTQ_RED_H_ */ 190
Indexes created Tue Sep 30 17:09:57 GMT 2025