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 <fcntl.h>
  17 #include <sys/socket.h>
  18 #include <netinet/in.h>
  19 #include <arpa/inet.h>
  20 #include <string.h>
  21
  22 #include "utils.h"
  23 #include "tc_util.h"
  24 #include "tc_cbq.h"
  25
  26 static void explain_class(void)
  27 {
  28         fprintf(stderr,
  29                 "Usage: ... cbq bandwidth BPS rate BPS maxburst PKTS [ avpkt BYTES ]\n"
  30                 "               [ minburst PKTS ] [ bounded ] [ isolated ]\n"
  31                 "               [ allot BYTES ] [ mpu BYTES ] [ weight RATE ]\n"
  32                 "               [ prio NUMBER ] [ cell BYTES ] [ ewma LOG ]\n"
  33                 "               [ estimator INTERVAL TIME_CONSTANT ]\n"
  34                 "               [ split CLASSID ] [ defmap MASK/CHANGE ]\n"
  35                 "               [ overhead BYTES ] [ linklayer TYPE ]\n");
  36 }
  37
  38 static void explain(void)
  39 {
  40         fprintf(stderr,
  41                 "Usage: ... cbq bandwidth BPS avpkt BYTES [ mpu BYTES ]\n"
  42                 "               [ cell BYTES ] [ ewma LOG ]\n");
  43 }
  44
  45 static void explain1(char *arg)
  46 {
  47         fprintf(stderr, "Illegal \"%s\"\n", arg);
  48 }
  49
  50
  51 static int cbq_parse_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
  52 {
  53         struct tc_ratespec r = {};
  54         struct tc_cbq_lssopt lss = {};
  55         __u32 rtab[256];
  56         unsigned mpu = 0, avpkt = 0, allot = 0;
  57         unsigned short overhead = 0;
  58         unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
  59         int cell_log =  -1;
  60         int ewma_log =  -1;
  61         struct rtattr *tail;
  62
  63         while (argc > 0) {
  64                 if (matches(*argv, "bandwidth") == 0 ||
  65                     matches(*argv, "rate") == 0) {
  66                         NEXT_ARG();
  67                         if (strchr(*argv, '%')) {
  68                                 if (get_percent_rate(&r.rate, *argv, dev)) {
  69                                         explain1("bandwidth");
  70                                         return -1;
  71                                 }
  72                         } else if (get_rate(&r.rate, *argv)) {
  73                                 explain1("bandwidth");
  74                                 return -1;
  75                         }
  76                 } else if (matches(*argv, "ewma") == 0) {
  77                         NEXT_ARG();
  78                         if (get_integer(&ewma_log, *argv, 0)) {
  79                                 explain1("ewma");
  80                                 return -1;
  81                         }
  82                         if (ewma_log > 31) {
  83                                 fprintf(stderr, "ewma_log must be < 32\n");
  84                                 return -1;
  85                         }
  86                 } else if (matches(*argv, "cell") == 0) {
  87                         unsigned int cell;
  88                         int i;
  89
  90                         NEXT_ARG();
  91                         if (get_size(&cell, *argv)) {
  92                                 explain1("cell");
  93                                 return -1;
  94                         }
  95                         for (i = 0; i < 32; i++)
  96                                 if ((1<<i) == cell)
  97                                         break;
  98                         if (i >= 32) {
  99                                 fprintf(stderr, "cell must be 2^n\n");
 100                                 return -1;
 101                         }
 102                         cell_log = i;
 103                 } else if (matches(*argv, "avpkt") == 0) {
 104                         NEXT_ARG();
 105                         if (get_size(&avpkt, *argv)) {
 106                                 explain1("avpkt");
 107                                 return -1;
 108                         }
 109                 } else if (matches(*argv, "mpu") == 0) {
 110                         NEXT_ARG();
 111                         if (get_size(&mpu, *argv)) {
 112                                 explain1("mpu");
 113                                 return -1;
 114                         }
 115                 } else if (matches(*argv, "allot") == 0) {
 116                         NEXT_ARG();
 117                         /* Accept and ignore "allot" for backward compatibility */
 118                         if (get_size(&allot, *argv)) {
 119                                 explain1("allot");
 120                                 return -1;
 121                         }
 122                 } else if (matches(*argv, "overhead") == 0) {
 123                         NEXT_ARG();
 124                         if (get_u16(&overhead, *argv, 10)) {
 125                                 explain1("overhead"); return -1;
 126                         }
 127                 } else if (matches(*argv, "linklayer") == 0) {
 128                         NEXT_ARG();
 129                         if (get_linklayer(&linklayer, *argv)) {
 130                                 explain1("linklayer"); return -1;
 131                         }
 132                 } else if (matches(*argv, "help") == 0) {
 133                         explain();
 134                         return -1;
 135                 } else {
 136                         fprintf(stderr, "What is \"%s\"?\n", *argv);
 137                         explain();
 138                         return -1;
 139                 }
 140                 argc--; argv++;
 141         }
 142
 143         /* OK. All options are parsed. */
 144
 145         if (r.rate == 0) {
 146                 fprintf(stderr, "CBQ: bandwidth is required parameter.\n");
 147                 return -1;
 148         }
 149         if (avpkt == 0) {
 150                 fprintf(stderr, "CBQ: \"avpkt\" is required.\n");
 151                 return -1;
 152         }
 153         if (allot < (avpkt*3)/2)
 154                 allot = (avpkt*3)/2;
 155
 156         r.mpu = mpu;
 157         r.overhead = overhead;
 158         if (tc_calc_rtable(&r, rtab, cell_log, allot, linklayer) < 0) {
 159                 fprintf(stderr, "CBQ: failed to calculate rate table.\n");
 160                 return -1;
 161         }
 162
 163         if (ewma_log < 0)
 164                 ewma_log = TC_CBQ_DEF_EWMA;
 165         lss.ewma_log = ewma_log;
 166         lss.maxidle = tc_calc_xmittime(r.rate, avpkt);
 167         lss.change = TCF_CBQ_LSS_MAXIDLE|TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
 168         lss.avpkt = avpkt;
 169
 170         tail = addattr_nest(n, 1024, TCA_OPTIONS);
 171         addattr_l(n, 1024, TCA_CBQ_RATE, &r, sizeof(r));
 172         addattr_l(n, 1024, TCA_CBQ_LSSOPT, &lss, sizeof(lss));
 173         addattr_l(n, 3024, TCA_CBQ_RTAB, rtab, 1024);
 174         if (show_raw) {
 175                 int i;
 176
 177                 for (i = 0; i < 256; i++)
 178                         printf("%u ", rtab[i]);
 179                 printf("\n");
 180         }
 181         addattr_nest_end(n, tail);
 182         return 0;
 183 }
 184
 185 static int cbq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv, struct nlmsghdr *n, const char *dev)
 186 {
 187         int wrr_ok = 0, fopt_ok = 0;
 188         struct tc_ratespec r = {};
 189         struct tc_cbq_lssopt lss = {};
 190         struct tc_cbq_wrropt wrr = {};
 191         struct tc_cbq_fopt fopt = {};
 192         __u32 rtab[256];
 193         unsigned mpu = 0;
 194         int cell_log =  -1;
 195         int ewma_log =  -1;
 196         unsigned int bndw = 0;
 197         unsigned minburst = 0, maxburst = 0;
 198         unsigned short overhead = 0;
 199         unsigned int linklayer = LINKLAYER_ETHERNET; /* Assume ethernet */
 200         struct rtattr *tail;
 201
 202         while (argc > 0) {
 203                 if (matches(*argv, "rate") == 0) {
 204                         NEXT_ARG();
 205                         if (strchr(*argv, '%')) {
 206                                 if (get_percent_rate(&r.rate, *argv, dev)) {
 207                                         explain1("rate");
 208                                         return -1;
 209                                 }
 210                         } else if (get_rate(&r.rate, *argv)) {
 211                                 explain1("rate");
 212                                 return -1;
 213                         }
 214                 } else if (matches(*argv, "bandwidth") == 0) {
 215                         NEXT_ARG();
 216                         if (strchr(*argv, '%')) {
 217                                 if (get_percent_rate(&bndw, *argv, dev)) {
 218                                         explain1("bandwidth");
 219                                         return -1;
 220                                 }
 221                         } else if (get_rate(&bndw, *argv)) {
 222                                 explain1("bandwidth");
 223                                 return -1;
 224                         }
 225                 } else if (matches(*argv, "minidle") == 0) {
 226                         NEXT_ARG();
 227                         if (get_u32(&lss.minidle, *argv, 0)) {
 228                                 explain1("minidle");
 229                                 return -1;
 230                         }
 231                         lss.change |= TCF_CBQ_LSS_MINIDLE;
 232                 } else if (matches(*argv, "minburst") == 0) {
 233                         NEXT_ARG();
 234                         if (get_u32(&minburst, *argv, 0)) {
 235                                 explain1("minburst");
 236                                 return -1;
 237                         }
 238                         lss.change |= TCF_CBQ_LSS_OFFTIME;
 239                 } else if (matches(*argv, "maxburst") == 0) {
 240                         NEXT_ARG();
 241                         if (get_u32(&maxburst, *argv, 0)) {
 242                                 explain1("maxburst");
 243                                 return -1;
 244                         }
 245                         lss.change |= TCF_CBQ_LSS_MAXIDLE;
 246                 } else if (matches(*argv, "bounded") == 0) {
 247                         lss.flags |= TCF_CBQ_LSS_BOUNDED;
 248                         lss.change |= TCF_CBQ_LSS_FLAGS;
 249                 } else if (matches(*argv, "borrow") == 0) {
 250                         lss.flags &= ~TCF_CBQ_LSS_BOUNDED;
 251                         lss.change |= TCF_CBQ_LSS_FLAGS;
 252                 } else if (matches(*argv, "isolated") == 0) {
 253                         lss.flags |= TCF_CBQ_LSS_ISOLATED;
 254                         lss.change |= TCF_CBQ_LSS_FLAGS;
 255                 } else if (matches(*argv, "sharing") == 0) {
 256                         lss.flags &= ~TCF_CBQ_LSS_ISOLATED;
 257                         lss.change |= TCF_CBQ_LSS_FLAGS;
 258                 } else if (matches(*argv, "ewma") == 0) {
 259                         NEXT_ARG();
 260                         if (get_integer(&ewma_log, *argv, 0)) {
 261                                 explain1("ewma");
 262                                 return -1;
 263                         }
 264                         if (ewma_log > 31) {
 265                                 fprintf(stderr, "ewma_log must be < 32\n");
 266                                 return -1;
 267                         }
 268                         lss.change |= TCF_CBQ_LSS_EWMA;
 269                 } else if (matches(*argv, "cell") == 0) {
 270                         unsigned int cell;
 271                         int i;
 272
 273                         NEXT_ARG();
 274                         if (get_size(&cell, *argv)) {
 275                                 explain1("cell");
 276                                 return -1;
 277                         }
 278                         for (i = 0; i < 32; i++)
 279                                 if ((1<<i) == cell)
 280                                         break;
 281                         if (i >= 32) {
 282                                 fprintf(stderr, "cell must be 2^n\n");
 283                                 return -1;
 284                         }
 285                         cell_log = i;
 286                 } else if (matches(*argv, "prio") == 0) {
 287                         unsigned int prio;
 288
 289                         NEXT_ARG();
 290                         if (get_u32(&prio, *argv, 0)) {
 291                                 explain1("prio");
 292                                 return -1;
 293                         }
 294                         if (prio > TC_CBQ_MAXPRIO) {
 295                                 fprintf(stderr, "\"prio\" must be number in the range 1...%d\n", TC_CBQ_MAXPRIO);
 296                                 return -1;
 297                         }
 298                         wrr.priority = prio;
 299                         wrr_ok++;
 300                 } else if (matches(*argv, "allot") == 0) {
 301                         NEXT_ARG();
 302                         if (get_size(&wrr.allot, *argv)) {
 303                                 explain1("allot");
 304                                 return -1;
 305                         }
 306                 } else if (matches(*argv, "avpkt") == 0) {
 307                         NEXT_ARG();
 308                         if (get_size(&lss.avpkt, *argv)) {
 309                                 explain1("avpkt");
 310                                 return -1;
 311                         }
 312                         lss.change |= TCF_CBQ_LSS_AVPKT;
 313                 } else if (matches(*argv, "mpu") == 0) {
 314                         NEXT_ARG();
 315                         if (get_size(&mpu, *argv)) {
 316                                 explain1("mpu");
 317                                 return -1;
 318                         }
 319                 } else if (matches(*argv, "weight") == 0) {
 320                         NEXT_ARG();
 321                         if (get_size(&wrr.weight, *argv)) {
 322                                 explain1("weight");
 323                                 return -1;
 324                         }
 325                         wrr_ok++;
 326                 } else if (matches(*argv, "split") == 0) {
 327                         NEXT_ARG();
 328                         if (get_tc_classid(&fopt.split, *argv)) {
 329                                 fprintf(stderr, "Invalid split node ID.\n");
 330                                 return -1;
 331                         }
 332                         fopt_ok++;
 333                 } else if (matches(*argv, "defmap") == 0) {
 334                         int err;
 335
 336                         NEXT_ARG();
 337                         err = sscanf(*argv, "%08x/%08x", &fopt.defmap, &fopt.defchange);
 338                         if (err < 1) {
 339                                 fprintf(stderr, "Invalid defmap, should be MASK32[/MASK]\n");
 340                                 return -1;
 341                         }
 342                         if (err == 1)
 343                                 fopt.defchange = ~0;
 344                         fopt_ok++;
 345                 } else if (matches(*argv, "overhead") == 0) {
 346                         NEXT_ARG();
 347                         if (get_u16(&overhead, *argv, 10)) {
 348                                 explain1("overhead"); return -1;
 349                         }
 350                 } else if (matches(*argv, "linklayer") == 0) {
 351                         NEXT_ARG();
 352                         if (get_linklayer(&linklayer, *argv)) {
 353                                 explain1("linklayer"); return -1;
 354                         }
 355                 } else if (matches(*argv, "help") == 0) {
 356                         explain_class();
 357                         return -1;
 358                 } else {
 359                         fprintf(stderr, "What is \"%s\"?\n", *argv);
 360                         explain_class();
 361                         return -1;
 362                 }
 363                 argc--; argv++;
 364         }
 365
 366         /* OK. All options are parsed. */
 367
 368         /* 1. Prepare link sharing scheduler parameters */
 369         if (r.rate) {
 370                 unsigned int pktsize = wrr.allot;
 371
 372                 if (wrr.allot < (lss.avpkt*3)/2)
 373                         wrr.allot = (lss.avpkt*3)/2;
 374                 r.mpu = mpu;
 375                 r.overhead = overhead;
 376                 if (tc_calc_rtable(&r, rtab, cell_log, pktsize, linklayer) < 0) {
 377                         fprintf(stderr, "CBQ: failed to calculate rate table.\n");
 378                         return -1;
 379                 }
 380         }
 381         if (ewma_log < 0)
 382                 ewma_log = TC_CBQ_DEF_EWMA;
 383         lss.ewma_log = ewma_log;
 384         if (lss.change&(TCF_CBQ_LSS_OFFTIME|TCF_CBQ_LSS_MAXIDLE)) {
 385                 if (lss.avpkt == 0) {
 386                         fprintf(stderr, "CBQ: avpkt is required for max/minburst.\n");
 387                         return -1;
 388                 }
 389                 if (bndw == 0 || r.rate == 0) {
 390                         fprintf(stderr, "CBQ: bandwidth&rate are required for max/minburst.\n");
 391                         return -1;
 392                 }
 393         }
 394         if (wrr.priority == 0 && (n->nlmsg_flags&NLM_F_EXCL)) {
 395                 wrr_ok = 1;
 396                 wrr.priority = TC_CBQ_MAXPRIO;
 397                 if (wrr.allot == 0)
 398                         wrr.allot = (lss.avpkt*3)/2;
 399         }
 400         if (wrr_ok) {
 401                 if (wrr.weight == 0)
 402                         wrr.weight = (wrr.priority == TC_CBQ_MAXPRIO) ? 1 : r.rate;
 403                 if (wrr.allot == 0) {
 404                         fprintf(stderr, "CBQ: \"allot\" is required to set WRR parameters.\n");
 405                         return -1;
 406                 }
 407         }
 408         if (lss.change&TCF_CBQ_LSS_MAXIDLE) {
 409                 lss.maxidle = tc_cbq_calc_maxidle(bndw, r.rate, lss.avpkt, ewma_log, maxburst);
 410                 lss.change |= TCF_CBQ_LSS_MAXIDLE;
 411                 lss.change |= TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
 412         }
 413         if (lss.change&TCF_CBQ_LSS_OFFTIME) {
 414                 lss.offtime = tc_cbq_calc_offtime(bndw, r.rate, lss.avpkt, ewma_log, minburst);
 415                 lss.change |= TCF_CBQ_LSS_OFFTIME;
 416                 lss.change |= TCF_CBQ_LSS_EWMA|TCF_CBQ_LSS_AVPKT;
 417         }
 418         if (lss.change&TCF_CBQ_LSS_MINIDLE) {
 419                 lss.minidle <<= lss.ewma_log;
 420                 lss.change |= TCF_CBQ_LSS_EWMA;
 421         }
 422
 423         tail = addattr_nest(n, 1024, TCA_OPTIONS);
 424         if (lss.change) {
 425                 lss.change |= TCF_CBQ_LSS_FLAGS;
 426                 addattr_l(n, 1024, TCA_CBQ_LSSOPT, &lss, sizeof(lss));
 427         }
 428         if (wrr_ok)
 429                 addattr_l(n, 1024, TCA_CBQ_WRROPT, &wrr, sizeof(wrr));
 430         if (fopt_ok)
 431                 addattr_l(n, 1024, TCA_CBQ_FOPT, &fopt, sizeof(fopt));
 432         if (r.rate) {
 433                 addattr_l(n, 1024, TCA_CBQ_RATE, &r, sizeof(r));
 434                 addattr_l(n, 3024, TCA_CBQ_RTAB, rtab, 1024);
 435                 if (show_raw) {
 436                         int i;
 437
 438                         for (i = 0; i < 256; i++)
 439                                 printf("%u ", rtab[i]);
 440                         printf("\n");
 441                 }
 442         }
 443         addattr_nest_end(n, tail);
 444         return 0;
 445 }
 446
 447
 448 static int cbq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 449 {
 450         struct rtattr *tb[TCA_CBQ_MAX+1];
 451         struct tc_ratespec *r = NULL;
 452         struct tc_cbq_lssopt *lss = NULL;
 453         struct tc_cbq_wrropt *wrr = NULL;
 454         struct tc_cbq_fopt *fopt = NULL;
 455         struct tc_cbq_ovl *ovl = NULL;
 456         unsigned int linklayer;
 457
 458         SPRINT_BUF(b1);
 459         SPRINT_BUF(b2);
 460
 461         if (opt == NULL)
 462                 return 0;
 463
 464         parse_rtattr_nested(tb, TCA_CBQ_MAX, opt);
 465
 466         if (tb[TCA_CBQ_RATE]) {
 467                 if (RTA_PAYLOAD(tb[TCA_CBQ_RATE]) < sizeof(*r))
 468                         fprintf(stderr, "CBQ: too short rate opt\n");
 469                 else
 470                         r = RTA_DATA(tb[TCA_CBQ_RATE]);
 471         }
 472         if (tb[TCA_CBQ_LSSOPT]) {
 473                 if (RTA_PAYLOAD(tb[TCA_CBQ_LSSOPT]) < sizeof(*lss))
 474                         fprintf(stderr, "CBQ: too short lss opt\n");
 475                 else
 476                         lss = RTA_DATA(tb[TCA_CBQ_LSSOPT]);
 477         }
 478         if (tb[TCA_CBQ_WRROPT]) {
 479                 if (RTA_PAYLOAD(tb[TCA_CBQ_WRROPT]) < sizeof(*wrr))
 480                         fprintf(stderr, "CBQ: too short wrr opt\n");
 481                 else
 482                         wrr = RTA_DATA(tb[TCA_CBQ_WRROPT]);
 483         }
 484         if (tb[TCA_CBQ_FOPT]) {
 485                 if (RTA_PAYLOAD(tb[TCA_CBQ_FOPT]) < sizeof(*fopt))
 486                         fprintf(stderr, "CBQ: too short fopt\n");
 487                 else
 488                         fopt = RTA_DATA(tb[TCA_CBQ_FOPT]);
 489         }
 490         if (tb[TCA_CBQ_OVL_STRATEGY]) {
 491                 if (RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]) < sizeof(*ovl))
 492                         fprintf(stderr, "CBQ: too short overlimit strategy %u/%u\n",
 493                                 (unsigned int) RTA_PAYLOAD(tb[TCA_CBQ_OVL_STRATEGY]),
 494                                 (unsigned int) sizeof(*ovl));
 495                 else
 496                         ovl = RTA_DATA(tb[TCA_CBQ_OVL_STRATEGY]);
 497         }
 498
 499         if (r) {
 500                 char buf[64];
 501
 502                 print_rate(buf, sizeof(buf), r->rate);
 503                 fprintf(f, "rate %s ", buf);
 504                 linklayer = (r->linklayer & TC_LINKLAYER_MASK);
 505                 if (linklayer > TC_LINKLAYER_ETHERNET || show_details)
 506                         fprintf(f, "linklayer %s ", sprint_linklayer(linklayer, b2));
 507                 if (show_details) {
 508                         fprintf(f, "cell %ub ", 1<<r->cell_log);
 509                         if (r->mpu)
 510                                 fprintf(f, "mpu %ub ", r->mpu);
 511                         if (r->overhead)
 512                                 fprintf(f, "overhead %ub ", r->overhead);
 513                 }
 514         }
 515         if (lss && lss->flags) {
 516                 int comma = 0;
 517
 518                 fprintf(f, "(");
 519                 if (lss->flags&TCF_CBQ_LSS_BOUNDED) {
 520                         fprintf(f, "bounded");
 521                         comma = 1;
 522                 }
 523                 if (lss->flags&TCF_CBQ_LSS_ISOLATED) {
 524                         if (comma)
 525                                 fprintf(f, ",");
 526                         fprintf(f, "isolated");
 527                 }
 528                 fprintf(f, ") ");
 529         }
 530         if (wrr) {
 531                 if (wrr->priority != TC_CBQ_MAXPRIO)
 532                         fprintf(f, "prio %u", wrr->priority);
 533                 else
 534                         fprintf(f, "prio no-transmit");
 535                 if (show_details) {
 536                         char buf[64];
 537
 538                         fprintf(f, "/%u ", wrr->cpriority);
 539                         if (wrr->weight != 1) {
 540                                 print_rate(buf, sizeof(buf), wrr->weight);
 541                                 fprintf(f, "weight %s ", buf);
 542                         }
 543                         if (wrr->allot)
 544                                 fprintf(f, "allot %ub ", wrr->allot);
 545                 }
 546         }
 547         if (lss && show_details) {
 548                 fprintf(f, "\nlevel %u ewma %u avpkt %ub ", lss->level, lss->ewma_log, lss->avpkt);
 549                 if (lss->maxidle) {
 550                         fprintf(f, "maxidle %s ", sprint_ticks(lss->maxidle>>lss->ewma_log, b1));
 551                         if (show_raw)
 552                                 fprintf(f, "[%08x] ", lss->maxidle);
 553                 }
 554                 if (lss->minidle != 0x7fffffff) {
 555                         fprintf(f, "minidle %s ", sprint_ticks(lss->minidle>>lss->ewma_log, b1));
 556                         if (show_raw)
 557                                 fprintf(f, "[%08x] ", lss->minidle);
 558                 }
 559                 if (lss->offtime) {
 560                         fprintf(f, "offtime %s ", sprint_ticks(lss->offtime, b1));
 561                         if (show_raw)
 562                                 fprintf(f, "[%08x] ", lss->offtime);
 563                 }
 564         }
 565         if (fopt && show_details) {
 566                 char buf[64];
 567
 568                 print_tc_classid(buf, sizeof(buf), fopt->split);
 569                 fprintf(f, "\nsplit %s ", buf);
 570                 if (fopt->defmap) {
 571                         fprintf(f, "defmap %08x", fopt->defmap);
 572                 }
 573         }
 574         return 0;
 575 }
 576
 577 static int cbq_print_xstats(struct qdisc_util *qu, FILE *f, struct rtattr *xstats)
 578 {
 579         struct tc_cbq_xstats *st;
 580
 581         if (xstats == NULL)
 582                 return 0;
 583
 584         if (RTA_PAYLOAD(xstats) < sizeof(*st))
 585                 return -1;
 586
 587         st = RTA_DATA(xstats);
 588         fprintf(f, "  borrowed %u overactions %u avgidle %g undertime %g", st->borrows,
 589                 st->overactions, (double)st->avgidle, (double)st->undertime);
 590         return 0;
 591 }
 592
 593 struct qdisc_util cbq_qdisc_util = {
 594         .id             = "cbq",
 595         .parse_qopt     = cbq_parse_opt,
 596         .print_qopt     = cbq_print_opt,
 597         .print_xstats   = cbq_print_xstats,
 598         .parse_copt     = cbq_parse_class_opt,
 599         .print_copt     = cbq_print_opt,
 600 };