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