tc/q_netem.c

   1 /*
   2  * q_netem.c            NETEM.
   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:     Stephen Hemminger <shemminger@linux-foundation.org>
  10  *
  11  */
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <math.h>
  16 #include <ctype.h>
  17 #include <unistd.h>
  18 #include <syslog.h>
  19 #include <fcntl.h>
  20 #include <sys/socket.h>
  21 #include <netinet/in.h>
  22 #include <arpa/inet.h>
  23 #include <string.h>
  24 #include <errno.h>
  25
  26 #include "utils.h"
  27 #include "tc_util.h"
  28 #include "tc_common.h"
  29
  30 static void explain(void)
  31 {
  32         fprintf(stderr,
  33 "Usage: ... netem [ limit PACKETS ] \n" \
  34 "                 [ delay TIME [ JITTER [CORRELATION]]]\n" \
  35 "                 [ distribution {uniform|normal|pareto|paretonormal} ]\n" \
  36 "                 [ corrupt PERCENT [CORRELATION]] \n" \
  37 "                 [ duplicate PERCENT [CORRELATION]]\n" \
  38 "                 [ loss random PERCENT [CORRELATION]]\n" \
  39 "                 [ loss state P13 [P31 [P32 [P23 P14]]]\n" \
  40 "                 [ loss gemodel PERCENT [R [1-H [1-K]]]\n" \
  41 "                 [ ecn ]\n" \
  42 "                 [ reorder PRECENT [CORRELATION] [ gap DISTANCE ]]\n" \
  43 "                 [ rate RATE [PACKETOVERHEAD] [CELLSIZE] [CELLOVERHEAD]]\n");
  44 }
  45
  46 static void explain1(const char *arg)
  47 {
  48         fprintf(stderr, "Illegal \"%s\"\n", arg);
  49 }
  50
  51 /* Upper bound on size of distribution
  52  *  really (TCA_BUF_MAX - other headers) / sizeof (__s16)
  53  */
  54 #define MAX_DIST        (16*1024)
  55
  56 static const double max_percent_value = 0xffffffff;
  57
  58 /* scaled value used to percent of maximum. */
  59 static void set_percent(__u32 *percent, double per)
  60 {
  61         *percent = (unsigned) rint(per * max_percent_value);
  62 }
  63
  64
  65 /* Parse either a fraction '.3' or percent '30%
  66  * return: 0 = ok, -1 = error, 1 = out of range
  67  */
  68 static int parse_percent(double *val, const char *str)
  69 {
  70         char *p;
  71
  72         *val = strtod(str, &p) / 100.;
  73         if (*p && strcmp(p, "%") )
  74                 return -1;
  75
  76         return 0;
  77 }
  78
  79 static int get_percent(__u32 *percent, const char *str)
  80 {
  81         double per;
  82
  83         if (parse_percent(&per, str))
  84                 return -1;
  85
  86         set_percent(percent, per);
  87         return 0;
  88 }
  89
  90 static void print_percent(char *buf, int len, __u32 per)
  91 {
  92         snprintf(buf, len, "%g%%", 100. * (double) per / max_percent_value);
  93 }
  94
  95 static char * sprint_percent(__u32 per, char *buf)
  96 {
  97         print_percent(buf, SPRINT_BSIZE-1, per);
  98         return buf;
  99 }
 100
 101 /*
 102  * Simplistic file parser for distrbution data.
 103  * Format is:
 104  *      # comment line(s)
 105  *      data0 data1 ...
 106  */
 107 static int get_distribution(const char *type, __s16 *data, int maxdata)
 108 {
 109         FILE *f;
 110         int n;
 111         long x;
 112         size_t len;
 113         char *line = NULL;
 114         char name[128];
 115
 116         snprintf(name, sizeof(name), "%s/%s.dist", get_tc_lib(), type);
 117         if ((f = fopen(name, "r")) == NULL) {
 118                 fprintf(stderr, "No distribution data for %s (%s: %s)\n",
 119                         type, name, strerror(errno));
 120                 return -1;
 121         }
 122
 123         n = 0;
 124         while (getline(&line, &len, f) != -1) {
 125                 char *p, *endp;
 126                 if (*line == '\n' || *line == '#')
 127                         continue;
 128
 129                 for (p = line; ; p = endp) {
 130                         x = strtol(p, &endp, 0);
 131                         if (endp == p)
 132                                 break;
 133
 134                         if (n >= maxdata) {
 135                                 fprintf(stderr, "%s: too much data\n",
 136                                         name);
 137                                 n = -1;
 138                                 goto error;
 139                         }
 140                         data[n++] = x;
 141                 }
 142         }
 143  error:
 144         free(line);
 145         fclose(f);
 146         return n;
 147 }
 148
 149 #define NEXT_IS_NUMBER() (NEXT_ARG_OK() && isdigit(argv[1][0]))
 150 #define NEXT_IS_SIGNED_NUMBER() \
 151         (NEXT_ARG_OK() && (isdigit(argv[1][0]) || argv[1][0] == '-'))
 152
 153 /* Adjust for the fact that psched_ticks aren't always usecs
 154    (based on kernel PSCHED_CLOCK configuration */
 155 static int get_ticks(__u32 *ticks, const char *str)
 156 {
 157         unsigned t;
 158
 159         if(get_time(&t, str))
 160                 return -1;
 161
 162         if (tc_core_time2big(t)) {
 163                 fprintf(stderr, "Illegal %u time (too large)\n", t);
 164                 return -1;
 165         }
 166
 167         *ticks = tc_core_time2tick(t);
 168         return 0;
 169 }
 170
 171 static int netem_parse_opt(struct qdisc_util *qu, int argc, char **argv,
 172                            struct nlmsghdr *n)
 173 {
 174         int dist_size = 0;
 175         struct rtattr *tail;
 176         struct tc_netem_qopt opt = { .limit = 1000 };
 177         struct tc_netem_corr cor;
 178         struct tc_netem_reorder reorder;
 179         struct tc_netem_corrupt corrupt;
 180         struct tc_netem_gimodel gimodel;
 181         struct tc_netem_gemodel gemodel;
 182         struct tc_netem_rate rate;
 183         __s16 *dist_data = NULL;
 184         __u16 loss_type = NETEM_LOSS_UNSPEC;
 185         int present[__TCA_NETEM_MAX];
 186         __u64 rate64 = 0;
 187
 188         memset(&cor, 0, sizeof(cor));
 189         memset(&reorder, 0, sizeof(reorder));
 190         memset(&corrupt, 0, sizeof(corrupt));
 191         memset(&rate, 0, sizeof(rate));
 192         memset(present, 0, sizeof(present));
 193
 194         for( ; argc > 0; --argc, ++argv) {
 195                 if (matches(*argv, "limit") == 0) {
 196                         NEXT_ARG();
 197                         if (get_size(&opt.limit, *argv)) {
 198                                 explain1("limit");
 199                                 return -1;
 200                         }
 201                 } else if (matches(*argv, "latency") == 0 ||
 202                            matches(*argv, "delay") == 0) {
 203                         NEXT_ARG();
 204                         if (get_ticks(&opt.latency, *argv)) {
 205                                 explain1("latency");
 206                                 return -1;
 207                         }
 208
 209                         if (NEXT_IS_NUMBER()) {
 210                                 NEXT_ARG();
 211                                 if (get_ticks(&opt.jitter, *argv)) {
 212                                         explain1("latency");
 213                                         return -1;
 214                                 }
 215
 216                                 if (NEXT_IS_NUMBER()) {
 217                                         NEXT_ARG();
 218                                         ++present[TCA_NETEM_CORR];
 219                                         if (get_percent(&cor.delay_corr, *argv)) {
 220                                                 explain1("latency");
 221                                                 return -1;
 222                                         }
 223                                 }
 224                         }
 225                 } else if (matches(*argv, "loss") == 0 ||
 226                            matches(*argv, "drop") == 0) {
 227                         if (opt.loss > 0 || loss_type != NETEM_LOSS_UNSPEC) {
 228                                 explain1("duplicate loss argument\n");
 229                                 return -1;
 230                         }
 231
 232                         NEXT_ARG();
 233                         /* Old (deprecated) random loss model syntax */
 234                         if (isdigit(argv[0][0]))
 235                                 goto random_loss_model;
 236
 237                         if (!strcmp(*argv, "random")) {
 238                                 NEXT_ARG();
 239         random_loss_model:
 240                                 if (get_percent(&opt.loss, *argv)) {
 241                                         explain1("loss percent");
 242                                         return -1;
 243                                 }
 244                                 if (NEXT_IS_NUMBER()) {
 245                                         NEXT_ARG();
 246                                         ++present[TCA_NETEM_CORR];
 247                                         if (get_percent(&cor.loss_corr, *argv)) {
 248                                                 explain1("loss correllation");
 249                                                 return -1;
 250                                         }
 251                                 }
 252                         } else if (!strcmp(*argv, "state")) {
 253                                 double p13;
 254
 255                                 NEXT_ARG();
 256                                 if (parse_percent(&p13, *argv)) {
 257                                         explain1("loss p13");
 258                                         return -1;
 259                                 }
 260
 261                                 /* set defaults */
 262                                 set_percent(&gimodel.p13, p13);
 263                                 set_percent(&gimodel.p31, 1. - p13);
 264                                 set_percent(&gimodel.p32, 0);
 265                                 set_percent(&gimodel.p23, 1.);
 266                                 set_percent(&gimodel.p14, 0);
 267                                 loss_type = NETEM_LOSS_GI;
 268
 269                                 if (!NEXT_IS_NUMBER())
 270                                         continue;
 271                                 NEXT_ARG();
 272                                 if (get_percent(&gimodel.p31, *argv)) {
 273                                         explain1("loss p31");
 274                                         return -1;
 275                                 }
 276
 277                                 if (!NEXT_IS_NUMBER())
 278                                         continue;
 279                                 NEXT_ARG();
 280                                 if (get_percent(&gimodel.p32, *argv)) {
 281                                         explain1("loss p32");
 282                                         return -1;
 283                                 }
 284
 285                                 if (!NEXT_IS_NUMBER())
 286                                         continue;
 287                                 NEXT_ARG();
 288                                 if (get_percent(&gimodel.p23, *argv)) {
 289                                         explain1("loss p23");
 290                                         return -1;
 291                                 }
 292                                 if (!NEXT_IS_NUMBER())
 293                                         continue;
 294                                 NEXT_ARG();
 295                                 if (get_percent(&gimodel.p14, *argv)) {
 296                                         explain1("loss p14");
 297                                         return -1;
 298                                 }
 299
 300                         } else if (!strcmp(*argv, "gemodel")) {
 301                                 NEXT_ARG();
 302                                 if (get_percent(&gemodel.p, *argv)) {
 303                                         explain1("loss gemodel p");
 304                                         return -1;
 305                                 }
 306
 307                                 /* set defaults */
 308                                 set_percent(&gemodel.r, 1.);
 309                                 set_percent(&gemodel.h, 0);
 310                                 set_percent(&gemodel.k1, 0);
 311                                 loss_type = NETEM_LOSS_GE;
 312
 313                                 if (!NEXT_IS_NUMBER())
 314                                         continue;
 315                                 NEXT_ARG();
 316                                 if (get_percent(&gemodel.r, *argv)) {
 317                                         explain1("loss gemodel r");
 318                                         return -1;
 319                                 }
 320
 321                                 if (!NEXT_IS_NUMBER())
 322                                         continue;
 323                                 NEXT_ARG();
 324                                 if (get_percent(&gemodel.h, *argv)) {
 325                                         explain1("loss gemodel h");
 326                                         return -1;
 327                                 }
 328                                 /* netem option is "1-h" but kernel
 329                                  * expects "h".
 330                                  */
 331                                 gemodel.h = max_percent_value - gemodel.h;
 332
 333                                 if (!NEXT_IS_NUMBER())
 334                                         continue;
 335                                 NEXT_ARG();
 336                                 if (get_percent(&gemodel.k1, *argv)) {
 337                                         explain1("loss gemodel k");
 338                                         return -1;
 339                                 }
 340                         } else {
 341                                 fprintf(stderr, "Unknown loss parameter: %s\n",
 342                                         *argv);
 343                                 return -1;
 344                         }
 345                 } else if (matches(*argv, "ecn") == 0) {
 346                                 present[TCA_NETEM_ECN] = 1;
 347                 } else if (matches(*argv, "reorder") == 0) {
 348                         NEXT_ARG();
 349                         present[TCA_NETEM_REORDER] = 1;
 350                         if (get_percent(&reorder.probability, *argv)) {
 351                                 explain1("reorder");
 352                                 return -1;
 353                         }
 354                         if (NEXT_IS_NUMBER()) {
 355                                 NEXT_ARG();
 356                                 ++present[TCA_NETEM_CORR];
 357                                 if (get_percent(&reorder.correlation, *argv)) {
 358                                         explain1("reorder");
 359                                         return -1;
 360                                 }
 361                         }
 362                 } else if (matches(*argv, "corrupt") == 0) {
 363                         NEXT_ARG();
 364                         present[TCA_NETEM_CORRUPT] = 1;
 365                         if (get_percent(&corrupt.probability, *argv)) {
 366                                 explain1("corrupt");
 367                                 return -1;
 368                         }
 369                         if (NEXT_IS_NUMBER()) {
 370                                 NEXT_ARG();
 371                                 ++present[TCA_NETEM_CORR];
 372                                 if (get_percent(&corrupt.correlation, *argv)) {
 373                                         explain1("corrupt");
 374                                         return -1;
 375                                 }
 376                         }
 377                 } else if (matches(*argv, "gap") == 0) {
 378                         NEXT_ARG();
 379                         if (get_u32(&opt.gap, *argv, 0)) {
 380                                 explain1("gap");
 381                                 return -1;
 382                         }
 383                 } else if (matches(*argv, "duplicate") == 0) {
 384                         NEXT_ARG();
 385                         if (get_percent(&opt.duplicate, *argv)) {
 386                                 explain1("duplicate");
 387                                 return -1;
 388                         }
 389                         if (NEXT_IS_NUMBER()) {
 390                                 NEXT_ARG();
 391                                 if (get_percent(&cor.dup_corr, *argv)) {
 392                                         explain1("duplicate");
 393                                         return -1;
 394                                 }
 395                         }
 396                 } else if (matches(*argv, "distribution") == 0) {
 397                         NEXT_ARG();
 398                         dist_data = calloc(sizeof(dist_data[0]), MAX_DIST);
 399                         dist_size = get_distribution(*argv, dist_data, MAX_DIST);
 400                         if (dist_size <= 0) {
 401                                 free(dist_data);
 402                                 return -1;
 403                         }
 404                 } else if (matches(*argv, "rate") == 0) {
 405                         ++present[TCA_NETEM_RATE];
 406                         NEXT_ARG();
 407                         if (get_rate64(&rate64, *argv)) {
 408                                 explain1("rate");
 409                                 return -1;
 410                         }
 411                         if (NEXT_IS_SIGNED_NUMBER()) {
 412                                 NEXT_ARG();
 413                                 if (get_s32(&rate.packet_overhead, *argv, 0)) {
 414                                         explain1("rate");
 415                                         return -1;
 416                                 }
 417                         }
 418                         if (NEXT_IS_NUMBER()) {
 419                                 NEXT_ARG();
 420                                 if (get_u32(&rate.cell_size, *argv, 0)) {
 421                                         explain1("rate");
 422                                         return -1;
 423                                 }
 424                         }
 425                         if (NEXT_IS_SIGNED_NUMBER()) {
 426                                 NEXT_ARG();
 427                                 if (get_s32(&rate.cell_overhead, *argv, 0)) {
 428                                         explain1("rate");
 429                                         return -1;
 430                                 }
 431                         }
 432                 } else if (strcmp(*argv, "help") == 0) {
 433                         explain();
 434                         return -1;
 435                 } else {
 436                         fprintf(stderr, "What is \"%s\"?\n", *argv);
 437                         explain();
 438                         return -1;
 439                 }
 440         }
 441
 442         tail = NLMSG_TAIL(n);
 443
 444         if (reorder.probability) {
 445                 if (opt.latency == 0) {
 446                         fprintf(stderr, "reordering not possible without specifying some delay\n");
 447                         explain();
 448                         return -1;
 449                 }
 450                 if (opt.gap == 0)
 451                         opt.gap = 1;
 452         } else if (opt.gap > 0) {
 453                 fprintf(stderr, "gap specified without reorder probability\n");
 454                 explain();
 455                 return -1;
 456         }
 457
 458         if (present[TCA_NETEM_ECN]) {
 459                 if (opt.loss <= 0 && loss_type == NETEM_LOSS_UNSPEC) {
 460                         fprintf(stderr, "ecn requested without loss model\n");
 461                         explain();
 462                         return -1;
 463                 }
 464         }
 465
 466         if (dist_data && (opt.latency == 0 || opt.jitter == 0)) {
 467                 fprintf(stderr, "distribution specified but no latency and jitter values\n");
 468                 explain();
 469                 return -1;
 470         }
 471
 472         if (addattr_l(n, 1024, TCA_OPTIONS, &opt, sizeof(opt)) < 0)
 473                 return -1;
 474
 475         if (present[TCA_NETEM_CORR] &&
 476             addattr_l(n, 1024, TCA_NETEM_CORR, &cor, sizeof(cor)) < 0)
 477                         return -1;
 478
 479         if (present[TCA_NETEM_REORDER] &&
 480             addattr_l(n, 1024, TCA_NETEM_REORDER, &reorder, sizeof(reorder)) < 0)
 481                 return -1;
 482
 483         if (present[TCA_NETEM_ECN] &&
 484             addattr_l(n, 1024, TCA_NETEM_ECN, &present[TCA_NETEM_ECN],
 485                       sizeof(present[TCA_NETEM_ECN])) < 0)
 486                         return -1;
 487
 488         if (present[TCA_NETEM_CORRUPT] &&
 489             addattr_l(n, 1024, TCA_NETEM_CORRUPT, &corrupt, sizeof(corrupt)) < 0)
 490                 return -1;
 491
 492         if (loss_type != NETEM_LOSS_UNSPEC) {
 493                 struct rtattr *start;
 494
 495                 start = addattr_nest(n, 1024, TCA_NETEM_LOSS | NLA_F_NESTED);
 496                 if (loss_type == NETEM_LOSS_GI) {
 497                         if (addattr_l(n, 1024, NETEM_LOSS_GI,
 498                                       &gimodel, sizeof(gimodel)) < 0)
 499                             return -1;
 500                 } else if (loss_type == NETEM_LOSS_GE) {
 501                         if (addattr_l(n, 1024, NETEM_LOSS_GE,
 502                                       &gemodel, sizeof(gemodel)) < 0)
 503                             return -1;
 504                 } else {
 505                         fprintf(stderr, "loss in the weeds!\n");
 506                         return -1;
 507                 }
 508
 509                 addattr_nest_end(n, start);
 510         }
 511
 512         if (present[TCA_NETEM_RATE]) {
 513                 if (rate64 >= (1ULL << 32)) {
 514                         if (addattr_l(n, 1024,
 515                                       TCA_NETEM_RATE64, &rate64, sizeof(rate64)) < 0)
 516                                 return -1;
 517                         rate.rate = ~0U;
 518                 } else {
 519                         rate.rate = rate64;
 520                 }
 521                 if (addattr_l(n, 1024, TCA_NETEM_RATE, &rate, sizeof(rate)) < 0)
 522                         return -1;
 523         }
 524
 525         if (dist_data) {
 526                 if (addattr_l(n, MAX_DIST * sizeof(dist_data[0]),
 527                               TCA_NETEM_DELAY_DIST,
 528                               dist_data, dist_size * sizeof(dist_data[0])) < 0)
 529                         return -1;
 530                 free(dist_data);
 531         }
 532         tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
 533         return 0;
 534 }
 535
 536 static int netem_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 537 {
 538         const struct tc_netem_corr *cor = NULL;
 539         const struct tc_netem_reorder *reorder = NULL;
 540         const struct tc_netem_corrupt *corrupt = NULL;
 541         const struct tc_netem_gimodel *gimodel = NULL;
 542         const struct tc_netem_gemodel *gemodel = NULL;
 543         int *ecn = NULL;
 544         struct tc_netem_qopt qopt;
 545         const struct tc_netem_rate *rate = NULL;
 546         int len = RTA_PAYLOAD(opt) - sizeof(qopt);
 547         __u64 rate64 = 0;
 548         SPRINT_BUF(b1);
 549
 550         if (opt == NULL)
 551                 return 0;
 552
 553         if (len < 0) {
 554                 fprintf(stderr, "options size error\n");
 555                 return -1;
 556         }
 557         memcpy(&qopt, RTA_DATA(opt), sizeof(qopt));
 558
 559         if (len > 0) {
 560                 struct rtattr *tb[TCA_NETEM_MAX+1];
 561                 parse_rtattr(tb, TCA_NETEM_MAX, RTA_DATA(opt) + sizeof(qopt),
 562                              len);
 563
 564                 if (tb[TCA_NETEM_CORR]) {
 565                         if (RTA_PAYLOAD(tb[TCA_NETEM_CORR]) < sizeof(*cor))
 566                                 return -1;
 567                         cor = RTA_DATA(tb[TCA_NETEM_CORR]);
 568                 }
 569                 if (tb[TCA_NETEM_REORDER]) {
 570                         if (RTA_PAYLOAD(tb[TCA_NETEM_REORDER]) < sizeof(*reorder))
 571                                 return -1;
 572                         reorder = RTA_DATA(tb[TCA_NETEM_REORDER]);
 573                 }
 574                 if (tb[TCA_NETEM_CORRUPT]) {
 575                         if (RTA_PAYLOAD(tb[TCA_NETEM_CORRUPT]) < sizeof(*corrupt))
 576                                 return -1;
 577                         corrupt = RTA_DATA(tb[TCA_NETEM_CORRUPT]);
 578                 }
 579                 if (tb[TCA_NETEM_LOSS]) {
 580                         struct rtattr *lb[NETEM_LOSS_MAX + 1];
 581
 582                         parse_rtattr_nested(lb, NETEM_LOSS_MAX, tb[TCA_NETEM_LOSS]);
 583                         if (lb[NETEM_LOSS_GI])
 584                                 gimodel = RTA_DATA(lb[NETEM_LOSS_GI]);
 585                         if (lb[NETEM_LOSS_GE])
 586                                 gemodel = RTA_DATA(lb[NETEM_LOSS_GE]);
 587                 }
 588                 if (tb[TCA_NETEM_RATE]) {
 589                         if (RTA_PAYLOAD(tb[TCA_NETEM_RATE]) < sizeof(*rate))
 590                                 return -1;
 591                         rate = RTA_DATA(tb[TCA_NETEM_RATE]);
 592                 }
 593                 if (tb[TCA_NETEM_ECN]) {
 594                         if (RTA_PAYLOAD(tb[TCA_NETEM_ECN]) < sizeof(*ecn))
 595                                 return -1;
 596                         ecn = RTA_DATA(tb[TCA_NETEM_ECN]);
 597                 }
 598                 if (tb[TCA_NETEM_RATE64]) {
 599                         if (RTA_PAYLOAD(tb[TCA_NETEM_RATE64]) < sizeof(rate64))
 600                                 return -1;
 601                         rate64 = rta_getattr_u64(tb[TCA_NETEM_RATE64]);
 602                 }
 603         }
 604
 605         fprintf(f, "limit %d", qopt.limit);
 606
 607         if (qopt.latency) {
 608                 fprintf(f, " delay %s", sprint_ticks(qopt.latency, b1));
 609
 610                 if (qopt.jitter) {
 611                         fprintf(f, "  %s", sprint_ticks(qopt.jitter, b1));
 612                         if (cor && cor->delay_corr)
 613                                 fprintf(f, " %s", sprint_percent(cor->delay_corr, b1));
 614                 }
 615         }
 616
 617         if (qopt.loss) {
 618                 fprintf(f, " loss %s", sprint_percent(qopt.loss, b1));
 619                 if (cor && cor->loss_corr)
 620                         fprintf(f, " %s", sprint_percent(cor->loss_corr, b1));
 621         }
 622
 623         if (gimodel) {
 624                 fprintf(f, " loss state p13 %s", sprint_percent(gimodel->p13, b1));
 625                 fprintf(f, " p31 %s", sprint_percent(gimodel->p31, b1));
 626                 fprintf(f, " p32 %s", sprint_percent(gimodel->p32, b1));
 627                 fprintf(f, " p23 %s", sprint_percent(gimodel->p23, b1));
 628                 fprintf(f, " p14 %s", sprint_percent(gimodel->p14, b1));
 629         }
 630
 631         if (gemodel) {
 632                 fprintf(f, " loss gemodel p %s",
 633                         sprint_percent(gemodel->p, b1));
 634                 fprintf(f, " r %s", sprint_percent(gemodel->r, b1));
 635                 fprintf(f, " 1-h %s", sprint_percent(max_percent_value -
 636                                                      gemodel->h, b1));
 637                 fprintf(f, " 1-k %s", sprint_percent(gemodel->k1, b1));
 638         }
 639
 640         if (qopt.duplicate) {
 641                 fprintf(f, " duplicate %s",
 642                         sprint_percent(qopt.duplicate, b1));
 643                 if (cor && cor->dup_corr)
 644                         fprintf(f, " %s", sprint_percent(cor->dup_corr, b1));
 645         }
 646
 647         if (reorder && reorder->probability) {
 648                 fprintf(f, " reorder %s",
 649                         sprint_percent(reorder->probability, b1));
 650                 if (reorder->correlation)
 651                         fprintf(f, " %s",
 652                                 sprint_percent(reorder->correlation, b1));
 653         }
 654
 655         if (corrupt && corrupt->probability) {
 656                 fprintf(f, " corrupt %s",
 657                         sprint_percent(corrupt->probability, b1));
 658                 if (corrupt->correlation)
 659                         fprintf(f, " %s",
 660                                 sprint_percent(corrupt->correlation, b1));
 661         }
 662
 663         if (rate && rate->rate) {
 664                 if (rate64)
 665                         fprintf(f, " rate %s", sprint_rate(rate64, b1));
 666                 else
 667                         fprintf(f, " rate %s", sprint_rate(rate->rate, b1));
 668                 if (rate->packet_overhead)
 669                         fprintf(f, " packetoverhead %d", rate->packet_overhead);
 670                 if (rate->cell_size)
 671                         fprintf(f, " cellsize %u", rate->cell_size);
 672                 if (rate->cell_overhead)
 673                         fprintf(f, " celloverhead %d", rate->cell_overhead);
 674         }
 675
 676         if (ecn)
 677                 fprintf(f, " ecn ");
 678
 679         if (qopt.gap)
 680                 fprintf(f, " gap %lu", (unsigned long)qopt.gap);
 681
 682
 683         return 0;
 684 }
 685
 686 struct qdisc_util netem_qdisc_util = {
 687         .id             = "netem",
 688         .parse_qopt     = netem_parse_opt,
 689         .print_qopt     = netem_print_opt,
 690 };
 691