Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/altq/altq_jobs.h
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1 /* $NetBSD: altq_jobs.h,v 1.3 2006/10/12 21:13:53 peter Exp $ */ 2 /* $KAME: altq_jobs.h,v 1.6 2003/07/10 12:07:48 kjc Exp $ */ 3 /* 4 * Copyright (c) 2001, Rector and Visitors of the University of 5 * Virginia. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, 9 * with or without modification, are permitted provided 10 * that the following conditions are met: 11 * 12 * Redistributions of source code must retain the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer. 15 * 16 * Redistributions in binary form must reproduce the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer in the documentation and/or other materials provided 19 * with the distribution. 20 * 21 * Neither the name of the University of Virginia nor the names 22 * of its contributors may be used to endorse or promote products 23 * derived from this software without specific prior written 24 * permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 27 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 28 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 29 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 30 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 31 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 32 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 33 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 35 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 37 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 38 * THE POSSIBILITY OF SUCH DAMAGE. 39 */ 40 /* 41 * JoBS - altq prototype implementation 42 * 43 * Author: Nicolas Christin <nicolas@cs.virginia.edu> 44 * 45 * JoBS algorithms originally devised and proposed by 46 * Nicolas Christin and Jorg Liebeherr. 47 * Grateful Acknowledgments to Tarek Abdelzaher for his help and 48 * comments, and to Kenjiro Cho for some helpful advice. 49 * Contributed by the Multimedia Networks Group at the University 50 * of Virginia. 51 * 52 * Papers and additional info can be found at 53 * http://qosbox.cs.virginia.edu 54 * 55 */ 56 57 #ifndef _ALTQ_ALTQ_JOBS_H_ 58 #define _ALTQ_ALTQ_JOBS_H_ 59 60 #include <altq/altq.h> 61 #include <altq/altq_classq.h> 62 63 #ifdef __cplusplus 64 extern "C" { 65 #endif 66 67 #define JOBS_MAXPRI 16 /* upper limit on the number of priorities */ 68 #define SCALE_RATE 32 69 #define SCALE_LOSS 32 70 #define SCALE_SHARE 16 71 #define GRANULARITY 1000000 /* microseconds */ 72 #define INFINITY LLONG_MAX 73 74 /* list of packet arrival times */ 75 struct _tsentry; 76 typedef TAILQ_HEAD(_timestamps, _tsentry) TSLIST; 77 typedef struct _tsentry { 78 TAILQ_ENTRY(_tsentry) ts_list; 79 uint64_t timestamp; 80 } TSENTRY; 81 82 /* 83 * timestamp list macros 84 */ 85 86 #define tslist_first(s) TAILQ_FIRST(s) 87 #define tslist_last(s) TAILQ_LAST(s, _timestamps) 88 #define tslist_empty(s) TAILQ_EMPTY(s) 89 90 /* 91 * scaling/conversion macros 92 * none of these macros present side-effects, hence the lowercase 93 */ 94 95 #define secs_to_ticks(x) ((x) * machclk_freq) 96 #define ticks_to_secs(x) ((x) / machclk_freq) 97 #define invsecs_to_invticks(x) ticks_to_secs(x) 98 #define invticks_to_invsecs(x) secs_to_ticks(x) 99 #define bits_to_bytes(x) ((x) >> 3) 100 #define bytes_to_bits(x) ((x) << 3) 101 #define scale_rate(x) ((x) << SCALE_RATE) 102 #define unscale_rate(x) ((x) >> SCALE_RATE) 103 #define bps_to_internal(x) (invsecs_to_invticks(bits_to_bytes(scale_rate(x)))) 104 #define internal_to_bps(x) (unscale_rate(invticks_to_invsecs(bytes_to_bits(x)))) 105 106 /* 107 * this macro takes care of possible wraparound 108 * effects in the computation of a delay 109 * no side-effects here either 110 */ 111 112 #define delay_diff(x, y) ((x >= y)?(x - y):((ULLONG_MAX-y)+x+1)) 113 114 /* 115 * additional macros (PKTCNTR_ADD can be found 116 * in the original distribution) 117 */ 118 119 #define PKTCNTR_SUB(cntr, len) do { \ 120 (cntr)->packets--; \ 121 (cntr)->bytes -= len; \ 122 } while (/*CONSTCOND*/ 0) 123 124 #define PKTCNTR_RESET(cntr) do { \ 125 (cntr)->packets = 0; \ 126 (cntr)->bytes = 0; \ 127 } while (/*CONSTCOND*/ 0) 128 129 struct jobs_interface { 130 char jobs_ifname[IFNAMSIZ]; /* interface name (e.g., fxp0) */ 131 u_long arg; /* request-specific argument */ 132 }; 133 struct jobs_attach { 134 struct jobs_interface iface; 135 u_int bandwidth; /* link bandwidth in bits/sec */ 136 u_int qlimit; /* buffer size in packets */ 137 u_int separate; /* separate buffers flag */ 138 }; 139 140 struct jobs_add_class { 141 struct jobs_interface iface; 142 int pri; /* priority (0 is the lowest) */ 143 int flags; /* misc flags (see below) */ 144 145 /* 146 * Delay Bound (-1 = NO ADC) is provided in us, 147 * and is converted to clock ticks 148 */ 149 int64_t cl_adc; 150 151 /* 152 * Loss Rate Bound (-1 = NO ALC) is provided in fraction of 1 153 * and is converted to a fraction of 2^(SCALE_LOSS) 154 */ 155 int64_t cl_alc; 156 157 /* 158 * lower bound on throughput (-1 = no ARC) 159 * is provided in (string) and 160 * is converted to internal format 161 */ 162 int64_t cl_arc; 163 164 /* RDC weight (-1 = NO RDC) - no unit */ 165 int64_t cl_rdc; 166 167 /* RLC weight (-1 = NO RLC) - no unit */ 168 int64_t cl_rlc; 169 170 u_long class_handle; /* return value */ 171 }; 172 173 /* jobs class flags */ 174 #define JOCF_CLEARDSCP 0x0010 /* clear diffserv codepoint */ 175 #define JOCF_DEFAULTCLASS 0x1000 /* default class */ 176 177 /* special class handles */ 178 #define JOBS_NULLCLASS_HANDLE 0 179 180 struct jobs_delete_class { 181 struct jobs_interface iface; 182 u_long class_handle; 183 }; 184 185 struct jobs_modify_class { 186 struct jobs_interface iface; 187 u_long class_handle; 188 int pri; 189 190 /* 191 * Delay Bound (-1 = NO ADC) is provided in us, 192 * and is converted to clock ticks 193 */ 194 int64_t cl_adc; 195 196 /* 197 * Loss Rate Bound (-1 = NO ALC) is provided in fraction of 1 198 * and is converted to a fraction of 2^(SCALE_LOSS) 199 */ 200 int64_t cl_alc; 201 202 /* 203 * lower bound on throughput (-1 = no ARC) 204 * is provided in (string) and 205 * is converted to internal format 206 */ 207 int64_t cl_arc; 208 209 /* RDC weight (-1 = NO RDC) - no unit */ 210 int64_t cl_rdc; 211 212 /* RLC weight (-1 = NO RLC) - no unit */ 213 int64_t cl_rlc; 214 215 int flags; 216 }; 217 218 struct jobs_add_filter { 219 struct jobs_interface iface; 220 u_long class_handle; 221 #ifdef ALTQ3_CLFIER_COMPAT 222 struct flow_filter filter; 223 #endif 224 u_long filter_handle; /* return value */ 225 }; 226 227 struct jobs_delete_filter { 228 struct jobs_interface iface; 229 u_long filter_handle; 230 }; 231 232 struct class_stats { 233 u_int adc_violations; 234 u_int totallength; 235 u_int period; 236 u_int qlength; 237 238 u_long class_handle; 239 240 int64_t service_rate; /* bps that should be out */ 241 242 u_int64_t avg_cycles_dequeue; 243 u_int64_t avg_cycles_enqueue; 244 u_int64_t avg_cycles2_dequeue; 245 u_int64_t avg_cycles2_enqueue; 246 u_int64_t avgdel; /* in us */ 247 u_int64_t bc_cycles_dequeue; 248 u_int64_t bc_cycles_enqueue; 249 u_int64_t busylength; /* in ms */ 250 u_int64_t lastdel; /* in us */ 251 u_int64_t total_dequeued; 252 u_int64_t total_enqueued; 253 u_int64_t wc_cycles_dequeue; 254 u_int64_t wc_cycles_enqueue; 255 256 struct pktcntr arrival; /* rin+dropped */ 257 struct pktcntr arrivalbusy; 258 struct pktcntr rin; /* dropped packet counter */ 259 struct pktcntr rout; /* transmitted packet counter */ 260 struct pktcntr dropcnt; /* dropped packet counter */ 261 }; 262 263 struct jobs_class_stats { 264 struct class_stats *stats; /* pointer to stats array */ 265 int maxpri; /* in/out */ 266 struct jobs_interface iface; 267 }; 268 269 #define JOBS_IF_ATTACH _IOW('Q', 1, struct jobs_attach) 270 #define JOBS_IF_DETACH _IOW('Q', 2, struct jobs_interface) 271 #define JOBS_ENABLE _IOW('Q', 3, struct jobs_interface) 272 #define JOBS_DISABLE _IOW('Q', 4, struct jobs_interface) 273 #define JOBS_CLEAR _IOW('Q', 6, struct jobs_interface) 274 #define JOBS_ADD_CLASS _IOWR('Q', 7, struct jobs_add_class) 275 #define JOBS_DEL_CLASS _IOW('Q', 8, struct jobs_delete_class) 276 #define JOBS_MOD_CLASS _IOW('Q', 9, struct jobs_modify_class) 277 #define JOBS_ADD_FILTER _IOWR('Q', 10, struct jobs_add_filter) 278 #define JOBS_DEL_FILTER _IOW('Q', 11, struct jobs_delete_filter) 279 #define JOBS_GETSTATS _IOWR('Q', 12, struct jobs_class_stats) 280 281 #ifdef _KERNEL 282 283 struct jobs_class { 284 TSLIST *arv_tm; /* list of timestamps */ 285 struct jobs_if *cl_jif; /* back pointer to jif */ 286 class_queue_t *cl_q; /* class queue structure */ 287 288 int cl_pri; /* priority */ 289 int cl_flags; /* class flags */ 290 291 u_long cl_handle; /* class handle */ 292 293 /* control variables */ 294 295 /* 296 * internal representation: 297 * bytes/unit_time << 32 = (bps /8 << 32)*1/machclk_freq 298 */ 299 int64_t service_rate; /* bps that should be out */ 300 int64_t min_rate_adc; /* bps that should be out for ADC/ARC */ 301 302 u_int64_t current_loss; /* % of packets dropped */ 303 u_int64_t cl_lastdel; /* in clock ticks */ 304 u_int64_t cl_avgdel; 305 306 /* statistics */ 307 u_int cl_period; /* backlog period */ 308 struct pktcntr cl_arrival; /* arrived packet counter */ 309 struct pktcntr cl_dropcnt; /* dropped packet counter */ 310 struct pktcntr cl_rin; /* let in packet counter */ 311 struct pktcntr cl_rout; /* transmitted packet counter */ 312 313 314 /* modified deficit round-robin specific variables */ 315 316 /* 317 * rout_th is SCALED for precision, as opposed to rout. 318 */ 319 int64_t st_service_rate; 320 u_int64_t cl_last_rate_update; 321 struct pktcntr cl_rout_th; /* theoretical transmissions */ 322 struct pktcntr st_arrival; /* rin+dropped */ 323 struct pktcntr st_rin; /* dropped packet counter */ 324 struct pktcntr st_rout; /* transmitted packet counter */ 325 struct pktcntr st_dropcnt; /* dropped packet counter */ 326 327 /* service guarantees */ 328 u_int adc_violations; 329 int concerned_adc; 330 int concerned_alc; 331 int concerned_arc; 332 int concerned_rdc; 333 int concerned_rlc; 334 /* 335 * Delay Bound (-1 = NO ADC) is provided in us, 336 * and is converted to clock ticks 337 */ 338 int64_t cl_adc; 339 340 /* 341 * Loss Rate Bound (-1 = NO ALC) is provided in fraction of 1 342 * and is converted to a fraction of 2^(SCALE_LOSS) 343 */ 344 int64_t cl_alc; 345 346 /* 347 * lower bound on throughput (-1 = no ARC) 348 * is provided in (string) and 349 * is converted to internal format 350 */ 351 int64_t cl_arc; 352 353 /* RDC weight (-1 = NO RDC) - no unit */ 354 int64_t cl_rdc; 355 356 /* RLC weight (-1 = NO RLC) - no unit */ 357 int64_t cl_rlc; 358 359 u_int64_t delay_prod_others; 360 u_int64_t loss_prod_others; 361 u_int64_t idletime; 362 }; 363 364 /* 365 * jobs interface state 366 */ 367 struct jobs_if { 368 struct jobs_if *jif_next; /* interface state list */ 369 struct ifaltq *jif_ifq; /* backpointer to ifaltq */ 370 struct jobs_class *jif_default; /* default class */ 371 struct jobs_class *jif_classes[JOBS_MAXPRI]; /* classes */ 372 #ifdef ALTQ3_CLFIER_COMPAT 373 struct acc_classifier jif_classifier; /* classifier */ 374 #endif 375 int jif_maxpri; /* max priority in use */ 376 377 u_int jif_bandwidth; /* link bandwidth in bps */ 378 u_int jif_qlimit; /* buffer size in packets */ 379 u_int jif_separate; /* separate buffers or not */ 380 u_int64_t avg_cycles_dequeue; 381 u_int64_t avg_cycles_enqueue; 382 u_int64_t avg_cycles2_dequeue; 383 u_int64_t avg_cycles2_enqueue; 384 u_int64_t bc_cycles_dequeue; 385 u_int64_t bc_cycles_enqueue; 386 u_int64_t wc_cycles_dequeue; 387 u_int64_t wc_cycles_enqueue; 388 u_int64_t total_dequeued; 389 u_int64_t total_enqueued; 390 }; 391 392 #endif /* _KERNEL */ 393 394 #ifdef __cplusplus 395 } 396 #endif 397 398 #endif /* _ALTQ_ALTQ_JOBS_H_ */
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