Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/altq/altq_rmclass.h
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1 /* $NetBSD: altq_rmclass.h,v 1.13 2022/05/24 20:50:18 andvar Exp $ */ 2 /* $KAME: altq_rmclass.h,v 1.10 2003/08/20 23:30:23 itojun Exp $ */ 3 4 /* 5 * Copyright (c) 1991-1997 Regents of the University of California. 6 * 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the Network Research 19 * Group at Lawrence Berkeley Laboratory. 20 * 4. Neither the name of the University nor of the Laboratory may be used 21 * to endorse or promote products derived from this software without 22 * specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef _ALTQ_ALTQ_RMCLASS_H_ 38 #define _ALTQ_ALTQ_RMCLASS_H_ 39 40 #include <altq/altq_classq.h> 41 42 /* #pragma ident "@(#)rm_class.h 1.20 97/10/23 SMI" */ 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 #define RM_MAXPRIO 8 /* Max priority */ 49 50 #ifdef _KERNEL 51 52 typedef struct mbuf mbuf_t; 53 typedef struct rm_ifdat rm_ifdat_t; 54 typedef struct rm_class rm_class_t; 55 56 struct red; 57 58 #define RM_GETTIME(now) nanotime(&now) 59 60 #define TS_LT(a, b) (((a)->tv_sec < (b)->tv_sec) || \ 61 (((a)->tv_nsec < (b)->tv_nsec) && ((a)->tv_sec <= (b)->tv_sec))) 62 63 #define TS_DELTA(a, b, delta) do { \ 64 register int64_t xxs; \ 65 \ 66 delta = (int64_t)((a)->tv_nsec - (b)->tv_nsec); \ 67 if ((xxs = (a)->tv_sec - (b)->tv_sec)) { \ 68 switch (xxs) { \ 69 default: \ 70 /* if (xxs < 0) \ 71 printf("rm_class: bogus time values\n"); */ \ 72 delta = 0; \ 73 /* fall through */ \ 74 case 2: \ 75 delta += 1000000000; \ 76 /* fall through */ \ 77 case 1: \ 78 delta += 1000000000; \ 79 break; \ 80 } \ 81 } \ 82 } while (0) 83 84 #define TS_ADD_DELTA(a, delta, res) do { \ 85 register long xxns = (a)->tv_nsec + (long)(delta); \ 86 \ 87 (res)->tv_sec = (a)->tv_sec; \ 88 while (xxns >= 1000000000) { \ 89 ++((res)->tv_sec); \ 90 xxns -= 1000000000; \ 91 } \ 92 (res)->tv_nsec = xxns; \ 93 } while (0) 94 95 #define RM_TIMEOUT 2 /* 1 Clock tick. */ 96 97 #if 1 98 #define RM_MAXQUEUED 1 /* this isn't used in ALTQ/CBQ */ 99 #else 100 #define RM_MAXQUEUED 16 /* Max number of packets downstream of CBQ */ 101 #endif 102 #define RM_MAXQUEUE 64 /* Max queue length */ 103 #define RM_FILTER_GAIN 5 /* log2 of gain, e.g., 5 => 31/32 */ 104 #define RM_POWER (1 << RM_FILTER_GAIN) 105 #define RM_MAXDEPTH 32 106 #define RM_NS_PER_SEC (1000000000) 107 #define RM_PS_PER_SEC (1000000000000) 108 109 typedef struct _rm_class_stats_ { 110 u_int handle; 111 u_int depth; 112 113 struct pktcntr xmit_cnt; /* packets sent in this class */ 114 struct pktcntr drop_cnt; /* dropped packets */ 115 u_int over; /* # times went over limit */ 116 u_int borrows; /* # times tried to borrow */ 117 u_int overactions; /* # times invoked overlimit action */ 118 u_int delays; /* # times invoked delay actions */ 119 } rm_class_stats_t; 120 121 /* 122 * CBQ Class state structure 123 */ 124 struct rm_class { 125 class_queue_t *q_; /* Queue of packets */ 126 rm_ifdat_t *ifdat_; 127 int pri_; /* Class priority. */ 128 int depth_; /* Class depth */ 129 uint64_t ps_per_byte_; /* PicoSeconds per byte. */ 130 u_int maxrate_; /* Bytes per second for this class. */ 131 u_int allotment_; /* Fraction of link bandwidth. */ 132 u_int w_allotment_; /* Weighted allotment for WRR */ 133 int bytes_alloc_; /* Allocation for round of WRR */ 134 135 int64_t avgidle_; 136 int64_t maxidle_; 137 int64_t minidle_; 138 int64_t offtime_; 139 int sleeping_; /* != 0 if delaying */ 140 int qthresh_; /* Queue threshold for formal link sharing */ 141 int leaf_; /* Note whether leaf class or not.*/ 142 143 rm_class_t *children_; /* Children of this class */ 144 rm_class_t *next_; /* Next pointer, used if child */ 145 146 rm_class_t *peer_; /* Peer class */ 147 rm_class_t *borrow_; /* Borrow class */ 148 rm_class_t *parent_; /* Parent class */ 149 150 void (*overlimit)(struct rm_class *, struct rm_class *); 151 void (*drop)(struct rm_class *); /* Class drop action. */ 152 153 struct red *red_; /* RED state pointer */ 154 struct altq_pktattr *pktattr_; /* saved hdr used by RED/ECN */ 155 int flags_; 156 157 int64_t last_pkttime_; /* saved pkt_time */ 158 struct timespec undertime_; /* time can next send */ 159 struct timespec last_; /* time last packet sent */ 160 struct timespec overtime_; 161 struct callout callout_; /* for timeout() calls */ 162 163 rm_class_stats_t stats_; /* Class Statistics */ 164 }; 165 166 /* 167 * CBQ Interface state 168 */ 169 struct rm_ifdat { 170 int queued_; /* # pkts queued downstream */ 171 int efficient_; /* Link Efficiency bit */ 172 int wrr_; /* Enable Weighted Round-Robin */ 173 uint64_t ps_per_byte_; /* Link byte speed. */ 174 int maxqueued_; /* Max packets to queue */ 175 int maxpkt_; /* Max packet size. */ 176 int qi_; /* In/out pointers for downstream */ 177 int qo_; /* packets */ 178 179 /* 180 * Active class state and WRR state. 181 */ 182 rm_class_t *active_[RM_MAXPRIO]; /* Active cl's in each pri */ 183 int na_[RM_MAXPRIO]; /* # of active cl's in a pri */ 184 int num_[RM_MAXPRIO]; /* # of cl's per pri */ 185 int alloc_[RM_MAXPRIO]; /* Byte Allocation */ 186 u_long M_[RM_MAXPRIO]; /* WRR weights. */ 187 188 /* 189 * Network Interface/Solaris Queue state pointer. 190 */ 191 struct ifaltq *ifq_; 192 rm_class_t *default_; /* Default Pkt class, BE */ 193 rm_class_t *root_; /* Root Link class. */ 194 rm_class_t *ctl_; /* Control Traffic class. */ 195 void (*restart)(struct ifaltq *); /* Restart routine. */ 196 197 /* 198 * Current packet downstream packet state and dynamic state. 199 */ 200 rm_class_t *borrowed_[RM_MAXQUEUED]; /* Class borrowed last */ 201 rm_class_t *class_[RM_MAXQUEUED]; /* class sending */ 202 int curlen_[RM_MAXQUEUED]; /* Current pktlen */ 203 struct timespec now_[RM_MAXQUEUED]; /* Current packet time. */ 204 int is_overlimit_[RM_MAXQUEUED];/* Current packet time. */ 205 206 int cutoff_; /* Cut-off depth for borrowing */ 207 208 struct timespec ifnow_; /* expected xmit completion time */ 209 #if 1 /* ALTQ4PPP */ 210 int maxiftime_; /* max delay inside interface */ 211 #endif 212 rm_class_t *pollcache_; /* cached rm_class by poll operation */ 213 }; 214 215 /* flags for rmc_init and rmc_newclass */ 216 /* class flags */ 217 #define RMCF_RED 0x0001 218 #define RMCF_ECN 0x0002 219 #define RMCF_RIO 0x0004 220 #define RMCF_FLOWVALVE 0x0008 /* use flowvalve (aka penalty-box) */ 221 #define RMCF_CLEARDSCP 0x0010 /* clear diffserv codepoint */ 222 223 /* flags for rmc_init */ 224 #define RMCF_WRR 0x0100 225 #define RMCF_EFFICIENT 0x0200 226 227 #define is_a_parent_class(cl) ((cl)->children_ != NULL) 228 229 extern rm_class_t *rmc_newclass(int, struct rm_ifdat *, uint64_t, 230 void (*)(struct rm_class *, struct rm_class *), 231 int, struct rm_class *, struct rm_class *, 232 u_int, int, u_int, int, int); 233 extern void rmc_delete_class(struct rm_ifdat *, struct rm_class *); 234 extern int rmc_modclass(struct rm_class *, uint64_t, int, 235 u_int, int, u_int, int); 236 extern int rmc_init(struct ifaltq *, struct rm_ifdat *, uint64_t, 237 void (*)(struct ifaltq *), 238 int, int, u_int, int, u_int, int); 239 extern int rmc_queue_packet(struct rm_class *, mbuf_t *); 240 extern mbuf_t *rmc_dequeue_next(struct rm_ifdat *, int); 241 extern void rmc_update_class_util(struct rm_ifdat *); 242 extern void rmc_delay_action(struct rm_class *, struct rm_class *); 243 extern void rmc_dropall(struct rm_class *); 244 extern int rmc_get_weight(struct rm_ifdat *, int); 245 246 #endif /* _KERNEL */ 247 248 #ifdef __cplusplus 249 } 250 #endif 251 252 #endif /* _ALTQ_ALTQ_RMCLASS_H_ */
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