1 /* $KAME: altq_rio.h,v 1.9 2003/07/10 12:07:49 kjc Exp $ */ 2 3 /* 4 * Copyright (C) 1998-2003 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_RIO_H_ 30 #define _ALTQ_ALTQ_RIO_H_ 31 32 #include <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 #ifdef ALTQ3_COMPAT 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 #endif /* ALTQ3_COMPAT */ 66 67 /* rio flags */ 68 #define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */ 69 #define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */ 70 #define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6) 71 #define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */ 72 73 #ifdef ALTQ3_COMPAT 74 /* 75 * IOCTLs for RIO 76 */ 77 #define RIO_IF_ATTACH _IOW('Q', 1, struct rio_interface) 78 #define RIO_IF_DETACH _IOW('Q', 2, struct rio_interface) 79 #define RIO_ENABLE _IOW('Q', 3, struct rio_interface) 80 #define RIO_DISABLE _IOW('Q', 4, struct rio_interface) 81 #define RIO_CONFIG _IOWR('Q', 6, struct rio_conf) 82 #define RIO_GETSTATS _IOWR('Q', 12, struct rio_stats) 83 #define RIO_SETDEFAULTS _IOW('Q', 30, struct redparams[RIO_NDROPPREC]) 84 #endif /* ALTQ3_COMPAT */ 85 86 #ifdef _KERNEL 87 88 typedef struct rio { 89 /* per drop precedence structure */ 90 struct dropprec_state { 91 /* red parameters */ 92 int inv_pmax; /* inverse of max drop probability */ 93 int th_min; /* red min threshold */ 94 int th_max; /* red max threshold */ 95 96 /* variables for internal use */ 97 int th_min_s; /* th_min scaled by avgshift */ 98 int th_max_s; /* th_max scaled by avgshift */ 99 int probd; /* drop probability denominator */ 100 101 int qlen; /* queue length */ 102 int avg; /* (scaled) queue length average */ 103 int count; /* packet count since the last dropped/ 104 marked packet */ 105 int idle; /* queue was empty */ 106 int old; /* avg is above th_min */ 107 struct timeval last; /* timestamp when queue becomes idle */ 108 } rio_precstate[RIO_NDROPPREC]; 109 110 int rio_wshift; /* log(red_weight) */ 111 int rio_weight; /* weight for EWMA */ 112 struct wtab *rio_wtab; /* weight table */ 113 114 int rio_pkttime; /* average packet time in micro sec 115 used for idle calibration */ 116 int rio_flags; /* rio flags */ 117 118 u_int8_t rio_codepoint; /* codepoint value to tag packets */ 119 u_int8_t rio_codepointmask; /* codepoint mask bits */ 120 121 struct redstats q_stats[RIO_NDROPPREC]; /* statistics */ 122 } rio_t; 123 124 #ifdef ALTQ3_COMPAT 125 typedef struct rio_queue { 126 struct rio_queue *rq_next; /* next red_state in the list */ 127 struct ifaltq *rq_ifq; /* backpointer to ifaltq */ 128 129 class_queue_t *rq_q; 130 131 rio_t *rq_rio; 132 } rio_queue_t; 133 #endif /* ALTQ3_COMPAT */ 134 135 extern rio_t *rio_alloc(int, struct redparams *, int, int); 136 extern void rio_destroy(rio_t *); 137 extern void rio_getstats(rio_t *, struct redstats *); 138 extern int rio_addq(rio_t *, class_queue_t *, struct mbuf *, 139 struct altq_pktattr *); 140 extern struct mbuf *rio_getq(rio_t *, class_queue_t *); 141 142 #endif /* _KERNEL */ 143 144 #endif /* _ALTQ_ALTQ_RIO_H_ */ 145