1 /*- 2 * Copyright (C) 1997-2003 3 * Sony Computer Science Laboratories Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $KAME: if_altq.h,v 1.12 2005/04/13 03:44:25 suz Exp $ 27 * $FreeBSD$ 28 */ 29 #ifndef _ALTQ_IF_ALTQ_H_ 30 #define _ALTQ_IF_ALTQ_H_ 31 32 #include <sys/lock.h> /* XXX */ 33 #include <sys/mutex.h> /* XXX */ 34 #include <sys/event.h> /* XXX */ 35 36 struct altq_pktattr; struct tb_regulator; struct top_cdnr; 37 38 /* 39 * Structure defining a queue for a network interface. 40 */ 41 struct ifaltq { 42 /* fields compatible with struct ifqueue */ 43 struct mbuf *ifq_head; 44 struct mbuf *ifq_tail; 45 int ifq_len; 46 int ifq_maxlen; 47 struct mtx ifq_mtx; 48 49 /* driver owned queue (used for bulk dequeue and prepend) UNLOCKED */ 50 struct mbuf *ifq_drv_head; 51 struct mbuf *ifq_drv_tail; 52 int ifq_drv_len; 53 int ifq_drv_maxlen; 54 55 /* alternate queueing related fields */ 56 int altq_type; /* discipline type */ 57 int altq_flags; /* flags (e.g. ready, in-use) */ 58 void *altq_disc; /* for discipline-specific use */ 59 struct ifnet *altq_ifp; /* back pointer to interface */ 60 61 int (*altq_enqueue)(struct ifaltq *, struct mbuf *, 62 struct altq_pktattr *); 63 struct mbuf *(*altq_dequeue)(struct ifaltq *, int); 64 int (*altq_request)(struct ifaltq *, int, void *); 65 66 /* classifier fields */ 67 void *altq_clfier; /* classifier-specific use */ 68 void *(*altq_classify)(void *, struct mbuf *, int); 69 70 /* token bucket regulator */ 71 struct tb_regulator *altq_tbr; 72 73 /* input traffic conditioner (doesn't belong to the output queue...) */ 74 struct top_cdnr *altq_cdnr; 75 }; 76 77 #ifdef _KERNEL 78 79 /* 80 * packet attributes used by queueing disciplines. 81 * pattr_class is a discipline-dependent scheduling class that is 82 * set by a classifier. 83 * pattr_hdr and pattr_af may be used by a discipline to access 84 * the header within a mbuf. (e.g. ECN needs to update the CE bit) 85 * note that pattr_hdr could be stale after m_pullup, though link 86 * layer output routines usually don't use m_pullup. link-level 87 * compression also invalidates these fields. thus, pattr_hdr needs 88 * to be verified when a discipline touches the header. 89 */ 90 struct altq_pktattr { 91 void *pattr_class; /* sched class set by classifier */ 92 int pattr_af; /* address family */ 93 caddr_t pattr_hdr; /* saved header position in mbuf */ 94 }; 95 96 /* 97 * mbuf tag to carry a queue id (and hints for ECN). 98 */ 99 struct altq_tag { 100 u_int32_t qid; /* queue id */ 101 /* hints for ecn */ 102 int af; /* address family */ 103 void *hdr; /* saved header position in mbuf */ 104 }; 105 106 /* 107 * a token-bucket regulator limits the rate that a network driver can 108 * dequeue packets from the output queue. 109 * modern cards are able to buffer a large amount of packets and dequeue 110 * too many packets at a time. this bursty dequeue behavior makes it 111 * impossible to schedule packets by queueing disciplines. 112 * a token-bucket is used to control the burst size in a device 113 * independent manner. 114 */ 115 struct tb_regulator { 116 int64_t tbr_rate; /* (scaled) token bucket rate */ 117 int64_t tbr_depth; /* (scaled) token bucket depth */ 118 119 int64_t tbr_token; /* (scaled) current token */ 120 int64_t tbr_filluptime; /* (scaled) time to fill up bucket */ 121 u_int64_t tbr_last; /* last time token was updated */ 122 123 int tbr_lastop; /* last dequeue operation type 124 needed for poll-and-dequeue */ 125 }; 126 127 /* if_altqflags */ 128 #define ALTQF_READY 0x01 /* driver supports alternate queueing */ 129 #define ALTQF_ENABLED 0x02 /* altq is in use */ 130 #define ALTQF_CLASSIFY 0x04 /* classify packets */ 131 #define ALTQF_CNDTNING 0x08 /* altq traffic conditioning is enabled */ 132 #define ALTQF_DRIVER1 0x40 /* driver specific */ 133 134 /* if_altqflags set internally only: */ 135 #define ALTQF_CANTCHANGE (ALTQF_READY) 136 137 /* altq_dequeue 2nd arg */ 138 #define ALTDQ_REMOVE 1 /* dequeue mbuf from the queue */ 139 #define ALTDQ_POLL 2 /* don't dequeue mbuf from the queue */ 140 141 /* altq request types (currently only purge is defined) */ 142 #define ALTRQ_PURGE 1 /* purge all packets */ 143 144 #define ALTQ_IS_READY(ifq) ((ifq)->altq_flags & ALTQF_READY) 145 #ifdef ALTQ 146 #define ALTQ_IS_ENABLED(ifq) ((ifq)->altq_flags & ALTQF_ENABLED) 147 #else 148 #define ALTQ_IS_ENABLED(ifq) 0 149 #endif 150 #define ALTQ_NEEDS_CLASSIFY(ifq) ((ifq)->altq_flags & ALTQF_CLASSIFY) 151 #define ALTQ_IS_CNDTNING(ifq) ((ifq)->altq_flags & ALTQF_CNDTNING) 152 153 #define ALTQ_SET_CNDTNING(ifq) ((ifq)->altq_flags |= ALTQF_CNDTNING) 154 #define ALTQ_CLEAR_CNDTNING(ifq) ((ifq)->altq_flags &= ~ALTQF_CNDTNING) 155 #define ALTQ_IS_ATTACHED(ifq) ((ifq)->altq_disc != NULL) 156 157 #define ALTQ_ENQUEUE(ifq, m, pa, err) \ 158 (err) = (*(ifq)->altq_enqueue)((ifq),(m),(pa)) 159 #define ALTQ_DEQUEUE(ifq, m) \ 160 (m) = (*(ifq)->altq_dequeue)((ifq), ALTDQ_REMOVE) 161 #define ALTQ_POLL(ifq, m) \ 162 (m) = (*(ifq)->altq_dequeue)((ifq), ALTDQ_POLL) 163 #define ALTQ_PURGE(ifq) \ 164 (void)(*(ifq)->altq_request)((ifq), ALTRQ_PURGE, (void *)0) 165 #define ALTQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 166 #define TBR_IS_ENABLED(ifq) ((ifq)->altq_tbr != NULL) 167 168 extern int altq_attach(struct ifaltq *, int, void *, 169 int (*)(struct ifaltq *, struct mbuf *, 170 struct altq_pktattr *), 171 struct mbuf *(*)(struct ifaltq *, int), 172 int (*)(struct ifaltq *, int, void *), 173 void *, 174 void *(*)(void *, struct mbuf *, int)); 175 extern int altq_detach(struct ifaltq *); 176 extern int altq_enable(struct ifaltq *); 177 extern int altq_disable(struct ifaltq *); 178 extern struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int); 179 extern int (*altq_input)(struct mbuf *, int); 180 #if 0 /* ALTQ3_CLFIER_COMPAT */ 181 void altq_etherclassify(struct ifaltq *, struct mbuf *, struct altq_pktattr *); 182 #endif 183 #endif /* _KERNEL */ 184 185 #endif /* _ALTQ_IF_ALTQ_H_ */ 186