tc/q_cbq.c

   1 /*
   2  * q_cbq.c              CBQ.
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  10  *
  11  */
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <unistd.h>
  16 #include <syslog.h>
  17 #include <fcntl.h>
  18 #include <sys/socket.h>
  19 #include <netinet/in.h>
  20 #include <arpa/inet.h>
  21 #include <string.h>
  22
  23 #include "utils.h"
  24 #include "tc_util.h"
  25 #include "tc_cbq.h"
  26
  27 static void explain_class(void)
  28 {
  29         fprintf(stderr, "Usage: ... cbq bandwidth BPS rate BPS maxburst PKTS [ avpkt BYTES ]\n");
  30         fprintf(stderr, "               [ minburst PKTS ] [ bounded ] [ isolated ]\n");
  31         fprintf(stderr, "               [ allot BYTES ] [ mpu BYTES ] [ weight RATE ]\n");
  32         fprintf(stderr, "               [ prio NUMBER ] [ cell BYTES ] [ ewma LOG ]\n");
  33         fprintf(stderr, "               [ estimator INTERVAL TIME_CONSTANT ]\n");
  34         fprintf(stderr, "               [ split CLASSID ] [ defmap MASK/CHANGE ]\n");
  35 }
  36
  37 static void explain(void)
  38 {
  39         fprintf(stderr, "Usage: ... cbq bandwidth BPS avpkt BYTES [ mpu BYTES ]\n");
  40         fprintf(stderr, "               [ cell BYTES ] [ ewma LOG ]\n");
  41 }
  42
  43 static void explain1(char *arg)
  44 {
  45         fprintf(stderr, "Illegal \"%s\"\n", arg);
  46 }
  47
  48 #define usage() return(-1)
  49
  50 static int cbq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
  51 {
  52         struct tc_ratespec r;
  53         struct tc_cbq_lssopt lss;
  54         __u32 rtab[256];
  55         unsigned mpu=0, avpkt=0, allot=0;
  56         unsigned short overhead=0;
  57         int cell_log=-1;
  58         int ewma_log=-1;
  59         struct rtattr *tail;
  60
  61         memset(&lss, 0, sizeof(lss));
  62         memset(&r, 0, sizeof(r));
  63
  64         while (argc > 0) {
  65                 if (matches(*argv, "bandwidth") == 0 ||
  66                     matches(*argv, "rate") == 0) {
  67                         NEXT_ARG();
  68                         if (get_rate(&r.rate, *argv)) {
  69                                 explain1("bandwidth");
  70                                 return -1;
  71                         }
  72                 } else if (matches(*argv, "ewma") == 0) {
  73                         NEXT_ARG();
  74                         if (get_integer(&ewma_log, *argv, 0)) {
  75                                 explain1("ewma");
  76                                 return -1;
  77                         }
  78                         if (ewma_log > 31) {
  79                                 fprintf(stderr, "ewma_log must be < 32\n");
  80                                 return -1;
  81                         }
  82                 } else if (matches(*argv, "cell") == 0) {
  83                         unsigned cell;
  84                         int i;
  85                         NEXT_ARG();
  86                         if (get_size(&cell, *argv)) {
  87                                 explain1("cell");
  88                                 return -1;
  89                         }
  90                         for (i=0; i<32; i++)
  91                                 if ((1<<i) == cell)
  92                                         break;
  93                         if (i>=32) {
  94                                 fprintf(stderr, "cell must be 2^n\n");
  95                                 return -1;
  96                         }
  97                         cell_log = i;
  98                 } else if (matches(*argv, "avpkt") == 0) {
  99                         NEXT_ARG();
 100                         if (get_size(&avpkt, *argv)) {
 101                                 explain1("avpkt");
 102                                 return -1;
 103                         }
 104                 } else if (matches(*argv, "mpu") == 0) {
 105                         NEXT_ARG();
 106                         if (get_size(&mpu, *argv)) {
 107                                 explain1("mpu");
 108                                 return -1;
 109                         }
 110                 } else if (matches(*argv, "allot") == 0) {
 111                         NEXT_ARG();
 112                         /* Accept and ignore "allot" for backward compatibility */
 113                         if (get_size(&allot, *argv)) {
 114                                 explain1("allot");
 115                                 return -1;
 116                         }
 117                 } else if (matches(*argv, "overhead") == 0) {
 118                         NEXT_ARG();
 119                         if (get_u16(&overhead, *argv, 10)) {
 120                                 explain1("overhead"); return -1;
 121                         }
 122                 } else if (matches(*argv, "help") == 0) {
 123                         explain();
 124                         return -1;
 125                 } else {
 126                         fprintf(stderr, "What is \"%s\"?\n", *argv);
 127                         explain();
 128                         return -1;
 129                 }
 130                 argc--; argv++;
 131         }
 132
 133         /* OK. All options are parsed. */
 134
 135         if (r.rate == 0) {
 136                 fprintf(stderr, "CBQ: bandwidth is required parameter.\n");
 137                 return -1;
 138         }
 139         if (avpkt == 0) {
 140                 fprintf(stderr, "CBQ: \"avpkt\" is required.\n");
 141                 return -1;
 142         }
 143         if (allot < (avpkt*3)/2)
 144                 allot = (avpkt*3)/2;
 145
 146         r.mpu = mpu;
 147         r.overhead = overhead;
 148         if (tc_calc_rtable(&r, rtab, cell_log, allot) < 0) {
 149                 fprintf(stderr, "CBQ: failed to calculate rate table.\n");
 150                 return -1;
 151         }
 152
 153         if (ewma_log < 0)
 154                 ewma_log = TC_CBQ_DEF_EWMA;
 155         lss.ewma_log = ewma_log;
 156         lss.maxidle = tc_calc_xmittime(r.rate, avpkt);
 157         lss.change = TCF_CBQ_LSS_MAXIDLE|TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
 158         lss.avpkt = avpkt;
 159
 160         tail = NLMSG_TAIL(n);
 161         addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
 162         addattr_l(n, 1024, TCA_CBQ_RATE, &r, sizeof(r));
 163         addattr_l(n, 1024, TCA_CBQ_LSSOPT, &lss, sizeof(lss));
 164         addattr_l(n, 3024, TCA_CBQ_RTAB, rtab, 1024);
 165         if (show_raw) {
 166                 int i;
 167                 for (i=0; i<256; i++)
 168                         printf("%u ", rtab[i]);
 169                 printf("\n");
 170         }
 171         tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
 172         return 0;
 173 }
 174
 175 static int cbq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n)
 176 {
 177         int wrr_ok=0, fopt_ok=0;
 178         struct tc_ratespec r;
 179         struct tc_cbq_lssopt lss;
 180         struct tc_cbq_wrropt wrr;
 181         struct tc_cbq_fopt fopt;
 182         struct tc_cbq_ovl ovl;
 183         __u32 rtab[256];
 184         unsigned mpu=0;
 185         int cell_log=-1;
 186         int ewma_log=-1;
 187         unsigned bndw = 0;
 188         unsigned minburst=0, maxburst=0;
 189         unsigned short overhead=0;
 190         struct rtattr *tail;
 191
 192         memset(&r, 0, sizeof(r));
 193         memset(&lss, 0, sizeof(lss));
 194         memset(&wrr, 0, sizeof(wrr));
 195         memset(&fopt, 0, sizeof(fopt));
 196         memset(&ovl, 0, sizeof(ovl));
 197
 198         while (argc > 0) {
 199                 if (matches(*argv, "rate") == 0) {
 200                         NEXT_ARG();
 201                         if (get_rate(&r.rate, *argv)) {
 202                                 explain1("rate");
 203                                 return -1;
 204                         }
 205                 } else if (matches(*argv, "bandwidth") == 0) {
 206                         NEXT_ARG();
 207                         if (get_rate(&bndw, *argv)) {
 208                                 explain1("bandwidth");
 209                                 return -1;
 210                         }
 211                 } else if (matches(*argv, "minidle") == 0) {
 212                         NEXT_ARG();
 213                         if (get_u32(&lss.minidle, *argv, 0)) {
 214                                 explain1("minidle");
 215                                 return -1;
 216                         }
 217                         lss.change |= TCF_CBQ_LSS_MINIDLE;
 218                 } else if (matches(*argv, "minburst") == 0) {
 219                         NEXT_ARG();
 220                         if (get_u32(&minburst, *argv, 0)) {
 221                                 explain1("minburst");
 222                                 return -1;
 223                         }
 224                         lss.change |= TCF_CBQ_LSS_OFFTIME;
 225                 } else if (matches(*argv, "maxburst") == 0) {
 226                         NEXT_ARG();
 227                         if (get_u32(&maxburst, *argv, 0)) {
 228                                 explain1("maxburst");
 229                                 return -1;
 230                         }
 231                         lss.change |= TCF_CBQ_LSS_MAXIDLE;
 232                 } else if (matches(*argv, "bounded") == 0) {
 233                         lss.flags |= TCF_CBQ_LSS_BOUNDED;
 234                         lss.change |= TCF_CBQ_LSS_FLAGS;
 235                 } else if (matches(*argv, "borrow") == 0) {
 236                         lss.flags &= ~TCF_CBQ_LSS_BOUNDED;
 237                         lss.change |= TCF_CBQ_LSS_FLAGS;
 238                 } else if (matches(*argv, "isolated") == 0) {
 239                         lss.flags |= TCF_CBQ_LSS_ISOLATED;
 240                         lss.change |= TCF_CBQ_LSS_FLAGS;
 241                 } else if (matches(*argv, "sharing") == 0) {
 242                         lss.flags &= ~TCF_CBQ_LSS_ISOLATED;
 243                         lss.change |= TCF_CBQ_LSS_FLAGS;
 244                 } else if (matches(*argv, "ewma") == 0) {
 245                         NEXT_ARG();
 246                         if (get_integer(&ewma_log, *argv, 0)) {
 247                                 explain1("ewma");
 248                                 return -1;
 249                         }
 250                         if (ewma_log > 31) {
 251                                 fprintf(stderr, "ewma_log must be < 32\n");
 252                                 return -1;
 253                         }
 254                         lss.change |= TCF_CBQ_LSS_EWMA;
 255                 } else if (matches(*argv, "cell") == 0) {
 256                         unsigned cell;
 257                         int i;
 258                         NEXT_ARG();
 259                         if (get_size(&cell, *argv)) {
 260                                 explain1("cell");
 261                                 return -1;
 262                         }
 263                         for (i=0; i<32; i++)
 264                                 if ((1<<i) == cell)
 265                                         break;
 266                         if (i>=32) {
 267                                 fprintf(stderr, "cell must be 2^n\n");
 268                                 return -1;
 269                         }
 270                         cell_log = i;
 271                 } else if (matches(*argv, "prio") == 0) {
 272                         unsigned prio;
 273                         NEXT_ARG();
 274                         if (get_u32(&prio, *argv, 0)) {
 275                                 explain1("prio");
 276                                 return -1;
 277                         }
 278                         if (prio > TC_CBQ_MAXPRIO) {
 279                                 fprintf(stderr, "\"prio\" must be number in the range 1...%d\n", TC_CBQ_MAXPRIO);
 280                                 return -1;
 281                         }
 282                         wrr.priority = prio;
 283                         wrr_ok++;
 284                 } else if (matches(*argv, "allot") == 0) {
 285                         NEXT_ARG();
 286                         if (get_size(&wrr.allot, *argv)) {
 287                                 explain1("allot");
 288                                 return -1;
 289                         }
 290                 } else if (matches(*argv, "avpkt") == 0) {
 291                         NEXT_ARG();
 292                         if (get_size(&lss.avpkt, *argv)) {
 293                                 explain1("avpkt");
 294                                 return -1;
 295                         }
 296                         lss.change |= TCF_CBQ_LSS_AVPKT;
 297                 } else if (matches(*argv, "mpu") == 0) {
 298                         NEXT_ARG();
 299                         if (get_size(&mpu, *argv)) {
 300                                 explain1("mpu");
 301                                 return -1;
 302                         }
 303                 } else if (matches(*argv, "weight") == 0) {
 304                         NEXT_ARG();
 305                         if (get_size(&wrr.weight, *argv)) {
 306                                 explain1("weight");
 307                                 return -1;
 308                         }
 309                         wrr_ok++;
 310                 } else if (matches(*argv, "split") == 0) {
 311                         NEXT_ARG();
 312                         if (get_tc_classid(&fopt.split, *argv)) {
 313                                 fprintf(stderr, "Invalid split node ID.\n");
 314                                 usage();
 315                         }
 316                         fopt_ok++;
 317                 } else if (matches(*argv, "defmap") == 0) {
 318                         int err;
 319                         NEXT_ARG();
 320                         err = sscanf(*argv, "%08x/%08x", &fopt.defmap, &fopt.defchange);
 321                         if (err < 1) {
 322                                 fprintf(stderr, "Invalid defmap, should be MASK32[/MASK]\n");
 323                                 return -1;
 324                         }
 325                         if (err == 1)
 326                                 fopt.defchange = ~0;
 327                         fopt_ok++;
 328                 } else if (matches(*argv, "overhead") == 0) {
 329                         NEXT_ARG();
 330                         if (get_u16(&overhead, *argv, 10)) {
 331                                 explain1("overhead"); return -1;
 332                         }
 333                 } else if (matches(*argv, "help") == 0) {
 334                         explain_class();
 335                         return -1;
 336                 } else {
 337                         fprintf(stderr, "What is \"%s\"?\n", *argv);
 338                         explain_class();
 339                         return -1;
 340                 }
 341                 argc--; argv++;
 342         }
 343
 344         /* OK. All options are parsed. */
 345
 346         /* 1. Prepare link sharing scheduler parameters */
 347         if (r.rate) {
 348                 unsigned pktsize = wrr.allot;
 349                 if (wrr.allot < (lss.avpkt*3)/2)
 350                         wrr.allot = (lss.avpkt*3)/2;
 351                 r.mpu = mpu;
 352                 r.overhead = overhead;
 353                 if (tc_calc_rtable(&r, rtab, cell_log, pktsize) < 0) {
 354                         fprintf(stderr, "CBQ: failed to calculate rate table.\n");
 355                         return -1;
 356                 }
 357         }
 358         if (ewma_log < 0)
 359                 ewma_log = TC_CBQ_DEF_EWMA;
 360         lss.ewma_log = ewma_log;
 361         if (lss.change&(TCF_CBQ_LSS_OFFTIME|TCF_CBQ_LSS_MAXIDLE)) {
 362                 if (lss.avpkt == 0) {
 363                         fprintf(stderr, "CBQ: avpkt is required for max/minburst.\n");
 364                         return -1;
 365                 }
 366                 if (bndw==0 || r.rate == 0) {
 367                         fprintf(stderr, "CBQ: bandwidth&rate are required for max/minburst.\n");
 368                         return -1;
 369                 }
 370         }
 371         if (wrr.priority == 0 && (n->nlmsg_flags&NLM_F_EXCL)) {
 372                 wrr_ok = 1;
 373                 wrr.priority = TC_CBQ_MAXPRIO;
 374                 if (wrr.allot == 0)
 375                         wrr.allot = (lss.avpkt*3)/2;
 376         }
 377         if (wrr_ok) {
 378                 if (wrr.weight == 0)
 379                         wrr.weight = (wrr.priority == TC_CBQ_MAXPRIO) ? 1 : r.rate;
 380                 if (wrr.allot == 0) {
 381                         fprintf(stderr, "CBQ: \"allot\" is required to set WRR parameters.\n");
 382                         return -1;
 383                 }
 384         }
 385         if (lss.change&TCF_CBQ_LSS_MAXIDLE) {
 386                 lss.maxidle = tc_cbq_calc_maxidle(bndw, r.rate, lss.avpkt, ewma_log, maxburst);
 387                 lss.change |= TCF_CBQ_LSS_MAXIDLE;
 388                 lss.change |= TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
 389         }
 390         if (lss.change&TCF_CBQ_LSS_OFFTIME) {
 391                 lss.offtime = tc_cbq_calc_offtime(bndw, r.rate, lss.avpkt, ewma_log, minburst);
 392                 lss.change |= TCF_CBQ_LSS_OFFTIME;
 393                 lss.change |= TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
 394         }
 395         if (lss.change&TCF_CBQ_LSS_MINIDLE) {
 396                 lss.minidle <<= lss.ewma_log;
 397                 lss.change |= TCF_CBQ_LSS_EWMA;
 398         }
 399
 400         tail = NLMSG_TAIL(n);
 401         addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
 402         if (lss.change) {
 403                 lss.change |= TCF_CBQ_LSS_FLAGS;
 404                 addattr_l(n, 1024, TCA_CBQ_LSSOPT, &lss, sizeof(lss));
 405         }
 406         if (wrr_ok)
 407                 addattr_l(n, 1024, TCA_CBQ_WRROPT, &wrr, sizeof(wrr));
 408         if (fopt_ok)
 409                 addattr_l(n, 1024, TCA_CBQ_FOPT, &fopt, sizeof(fopt));
 410         if (r.rate) {
 411                 addattr_l(n, 1024, TCA_CBQ_RATE, &r, sizeof(r));
 412                 addattr_l(n, 3024, TCA_CBQ_RTAB, rtab, 1024);
 413                 if (show_raw) {
 414                         int i;
 415                         for (i=0; i<256; i++)
 416                                 printf("%u ", rtab[i]);
 417                         printf("\n");
 418                 }
 419         }
 420         tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
 421         return 0;
 422 }
 423
 424
 425 static int cbq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 426 {
 427         struct rtattr *tb[TCA_CBQ_MAX+1];
 428         struct tc_ratespec *r = NULL;
 429         struct tc_cbq_lssopt *lss = NULL;
 430         struct tc_cbq_wrropt *wrr = NULL;
 431         struct tc_cbq_fopt *fopt = NULL;
 432         struct tc_cbq_ovl *ovl = NULL;
 433         SPRINT_BUF(b1);
 434
 435         if (opt == NULL)
 436                 return 0;
 437
 438         parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);
 439
 440         if (tb[TCA_CBQ_RATE]) {
 441                 if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
 442                         fprintf(stderr, "CBQ: too short rate opt\n");
 443                 else
 444                         r = RTA_DATA(tb[TCA_CBQ_RATE]);
 445         }
 446         if (tb[TCA_CBQ_LSSOPT]) {
 447                 if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
 448                         fprintf(stderr, "CBQ: too short lss opt\n");
 449                 else
 450                         lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
 451         }
 452         if (tb[TCA_CBQ_WRROPT]) {
 453                 if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
 454                         fprintf(stderr, "CBQ: too short wrr opt\n");
 455                 else
 456                         wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
 457         }
 458         if (tb[TCA_CBQ_FOPT]) {
 459                 if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
 460                         fprintf(stderr, "CBQ: too short fopt\n");
 461                 else
 462                         fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
 463         }
 464         if (tb[TCA_CBQ_OVL_STRATEGY]) {
 465                 if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
 466                         fprintf(stderr, "CBQ: too short overlimit strategy %u/%u\n",
 467                                 (unsigned) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
 468                                 (unsigned) sizeof(*ovl));
 469                 else
 470                         ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
 471         }
 472
 473         if (r) {
 474                 char buf[64];
 475                 print_rate(buf, sizeof(buf), r->rate);
 476                 fprintf(f, "rate %s ", buf);
 477                 if (show_details) {
 478                         fprintf(f, "cell %ub ", 1<<r->cell_log);
 479                         if (r->mpu)
 480                                 fprintf(f, "mpu %ub ", r->mpu);
 481                         if (r->overhead)
 482                                 fprintf(f, "overhead %ub ", r->overhead);
 483                 }
 484         }
 485         if (lss && lss->flags) {
 486                 int comma=0;
 487                 fprintf(f, "(");
 488                 if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
 489                         fprintf(f, "bounded");
 490                         comma=1;
 491                 }
 492                 if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
 493                         if (comma)
 494                                 fprintf(f, ",");
 495                         fprintf(f, "isolated");
 496                 }
 497                 fprintf(f, ") ");
 498         }
 499         if (wrr) {
 500                 if (wrr->priority != TC_CBQ_MAXPRIO)
 501                         fprintf(f, "prio %u", wrr->priority);
 502                 else
 503                         fprintf(f, "prio no-transmit");
 504                 if (show_details) {
 505                         char buf[64];
 506                         fprintf(f, "/%u ", wrr->cpriority);
 507                         if (wrr->weight != 1) {
 508                                 print_rate(buf, sizeof(buf), wrr->weight);
 509                                 fprintf(f, "weight %s ", buf);
 510                         }
 511                         if (wrr->allot)
 512                                 fprintf(f, "allot %ub ", wrr->allot);
 513                 }
 514         }
 515         if (lss && show_details) {
 516                 fprintf(f, "\nlevel %u ewma %u avpkt %ub ", lss->level, lss->ewma_log, lss->avpkt);
 517                 if (lss->maxidle) {
 518                         fprintf(f, "maxidle %s ", sprint_ticks(lss->maxidle>>lss->ewma_log, b1));
 519                         if (show_raw)
 520                                 fprintf(f, "[%08x] ", lss->maxidle);
 521                 }
 522                 if (lss->minidle!=0x7fffffff) {
 523                         fprintf(f, "minidle %s ", sprint_ticks(lss->minidle>>lss->ewma_log, b1));
 524                         if (show_raw)
 525                                 fprintf(f, "[%08x] ", lss->minidle);
 526                 }
 527                 if (lss->offtime) {
 528                         fprintf(f, "offtime %s ", sprint_ticks(lss->offtime, b1));
 529                         if (show_raw)
 530                                 fprintf(f, "[%08x] ", lss->offtime);
 531                 }
 532         }
 533         if (fopt && show_details) {
 534                 char buf[64];
 535                 print_tc_classid(buf, sizeof(buf), fopt->split);
 536                 fprintf(f, "\nsplit %s ", buf);
 537                 if (fopt->defmap) {
 538                         fprintf(f, "defmap %08x", fopt->defmap);
 539                 }
 540         }
 541         return 0;
 542 }
 543
 544 static int cbq_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
 545 {
 546         struct tc_cbq_xstats *st;
 547
 548         if (xstats == NULL)
 549                 return 0;
 550
 551         if (RTA_PAYLOAD(xstats) < sizeof(*st))
 552                 return -1;
 553
 554         st = RTA_DATA(xstats);
 555         fprintf(f, "  borrowed %u overactions %u avgidle %g undertime %g", st->borrows,
 556                 st->overactions, (double)st->avgidle, (double)st->undertime);
 557         return 0;
 558 }
 559
 560 struct qdisc_util cbq_qdisc_util = {
 561         .id             = "cbq",
 562         .parse_qopt     = cbq_parse_opt,
 563         .print_qopt     = cbq_print_opt,
 564         .print_xstats   = cbq_print_xstats,
 565         .parse_copt     = cbq_parse_class_opt,
 566         .print_copt     = cbq_print_opt,
 567 };
 568