tc/q_cake.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2
   3 /*
   4  * Common Applications Kept Enhanced  --  CAKE
   5  *
   6  *  Copyright (C) 2014-2018 Jonathan Morton <chromatix99@gmail.com>
   7  *  Copyright (C) 2017-2018 Toke Høiland-Jørgensen <toke@toke.dk>
   8  */
   9
  10 #include <stddef.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <syslog.h>
  15 #include <fcntl.h>
  16 #include <sys/socket.h>
  17 #include <netinet/in.h>
  18 #include <arpa/inet.h>
  19 #include <string.h>
  20 #include <inttypes.h>
  21
  22 #include "utils.h"
  23 #include "tc_util.h"
  24
  25 struct cake_preset {
  26         char *name;
  27         unsigned int target;
  28         unsigned int interval;
  29 };
  30
  31 static struct cake_preset presets[] = {
  32         {"datacentre",          5,              100},
  33         {"lan",                 50,             1000},
  34         {"metro",               500,            10000},
  35         {"regional",            1500,           30000},
  36         {"internet",            5000,           100000},
  37         {"oceanic",             15000,          300000},
  38         {"satellite",           50000,          1000000},
  39         {"interplanetary",      50000000,       1000000000},
  40 };
  41
  42 static const char * diffserv_names[CAKE_DIFFSERV_MAX] = {
  43         [CAKE_DIFFSERV_DIFFSERV3] = "diffserv3",
  44         [CAKE_DIFFSERV_DIFFSERV4] = "diffserv4",
  45         [CAKE_DIFFSERV_DIFFSERV8] = "diffserv8",
  46         [CAKE_DIFFSERV_BESTEFFORT] = "besteffort",
  47         [CAKE_DIFFSERV_PRECEDENCE] = "precedence",
  48 };
  49
  50 static const char * flowmode_names[CAKE_FLOW_MAX] = {
  51         [CAKE_FLOW_NONE] = "flowblind",
  52         [CAKE_FLOW_SRC_IP] = "srchost",
  53         [CAKE_FLOW_DST_IP] = "dsthost",
  54         [CAKE_FLOW_HOSTS] = "hosts",
  55         [CAKE_FLOW_FLOWS] = "flows",
  56         [CAKE_FLOW_DUAL_SRC] = "dual-srchost",
  57         [CAKE_FLOW_DUAL_DST] = "dual-dsthost",
  58         [CAKE_FLOW_TRIPLE] = "triple-isolate",
  59 };
  60
  61 static struct cake_preset *find_preset(char *argv)
  62 {
  63         int i;
  64
  65         for (i = 0; i < ARRAY_SIZE(presets); i++)
  66                 if (!strcmp(argv, presets[i].name))
  67                         return &presets[i];
  68         return NULL;
  69 }
  70
  71 static void explain(void)
  72 {
  73         fprintf(stderr,
  74                 "Usage: ... cake [ bandwidth RATE | unlimited* | autorate-ingress ]\n"
  75                 "                [ rtt TIME | datacentre | lan | metro | regional |\n"
  76                 "                  internet* | oceanic | satellite | interplanetary ]\n"
  77                 "                [ besteffort | diffserv8 | diffserv4 | diffserv3* ]\n"
  78                 "                [ flowblind | srchost | dsthost | hosts | flows |\n"
  79                 "                  dual-srchost | dual-dsthost | triple-isolate* ]\n"
  80                 "                [ nat | nonat* ]\n"
  81                 "                [ wash | nowash* ]\n"
  82                 "                [ split-gso* | no-split-gso ]\n"
  83                 "                [ ack-filter | ack-filter-aggressive | no-ack-filter* ]\n"
  84                 "                [ memlimit LIMIT ]\n"
  85                 "                [ fwmark MASK ]\n"
  86                 "                [ ptm | atm | noatm* ] [ overhead N | conservative | raw* ]\n"
  87                 "                [ mpu N ] [ ingress | egress* ]\n"
  88                 "                (* marks defaults)\n");
  89 }
  90
  91 static int cake_parse_opt(struct qdisc_util *qu, int argc, char **argv,
  92                           struct nlmsghdr *n, const char *dev)
  93 {
  94         struct cake_preset *preset, *preset_set = NULL;
  95         bool overhead_override = false;
  96         bool overhead_set = false;
  97         unsigned int interval = 0;
  98         unsigned int diffserv = 0;
  99         unsigned int memlimit = 0;
 100         unsigned int fwmark = 0;
 101         unsigned int target = 0;
 102         __u64 bandwidth = 0;
 103         int ack_filter = -1;
 104         struct rtattr *tail;
 105         int split_gso = -1;
 106         int unlimited = 0;
 107         int flowmode = -1;
 108         int autorate = -1;
 109         int ingress = -1;
 110         int overhead = 0;
 111         int wash = -1;
 112         int nat = -1;
 113         int atm = -1;
 114         int mpu = 0;
 115
 116         while (argc > 0) {
 117                 if (strcmp(*argv, "bandwidth") == 0) {
 118                         NEXT_ARG();
 119                         if (get_rate64(&bandwidth, *argv)) {
 120                                 fprintf(stderr, "Illegal \"bandwidth\"\n");
 121                                 return -1;
 122                         }
 123                         unlimited = 0;
 124                         autorate = 0;
 125                 } else if (strcmp(*argv, "unlimited") == 0) {
 126                         bandwidth = 0;
 127                         unlimited = 1;
 128                         autorate = 0;
 129                 } else if (strcmp(*argv, "autorate-ingress") == 0) {
 130                         autorate = 1;
 131                 } else if (strcmp(*argv, "rtt") == 0) {
 132                         NEXT_ARG();
 133                         if (get_time(&interval, *argv)) {
 134                                 fprintf(stderr, "Illegal \"rtt\"\n");
 135                                 return -1;
 136                         }
 137                         target = interval / 20;
 138                         if (!target)
 139                                 target = 1;
 140                 } else if ((preset = find_preset(*argv))) {
 141                         if (preset_set)
 142                                 duparg(*argv, preset_set->name);
 143                         preset_set = preset;
 144                         target = preset->target;
 145                         interval = preset->interval;
 146                 } else if (strcmp(*argv, "besteffort") == 0) {
 147                         diffserv = CAKE_DIFFSERV_BESTEFFORT;
 148                 } else if (strcmp(*argv, "precedence") == 0) {
 149                         diffserv = CAKE_DIFFSERV_PRECEDENCE;
 150                 } else if (strcmp(*argv, "diffserv8") == 0) {
 151                         diffserv = CAKE_DIFFSERV_DIFFSERV8;
 152                 } else if (strcmp(*argv, "diffserv4") == 0) {
 153                         diffserv = CAKE_DIFFSERV_DIFFSERV4;
 154                 } else if (strcmp(*argv, "diffserv") == 0) {
 155                         diffserv = CAKE_DIFFSERV_DIFFSERV4;
 156                 } else if (strcmp(*argv, "diffserv3") == 0) {
 157                         diffserv = CAKE_DIFFSERV_DIFFSERV3;
 158                 } else if (strcmp(*argv, "nowash") == 0) {
 159                         wash = 0;
 160                 } else if (strcmp(*argv, "wash") == 0) {
 161                         wash = 1;
 162                 } else if (strcmp(*argv, "split-gso") == 0) {
 163                         split_gso = 1;
 164                 } else if (strcmp(*argv, "no-split-gso") == 0) {
 165                         split_gso = 0;
 166                 } else if (strcmp(*argv, "flowblind") == 0) {
 167                         flowmode = CAKE_FLOW_NONE;
 168                 } else if (strcmp(*argv, "srchost") == 0) {
 169                         flowmode = CAKE_FLOW_SRC_IP;
 170                 } else if (strcmp(*argv, "dsthost") == 0) {
 171                         flowmode = CAKE_FLOW_DST_IP;
 172                 } else if (strcmp(*argv, "hosts") == 0) {
 173                         flowmode = CAKE_FLOW_HOSTS;
 174                 } else if (strcmp(*argv, "flows") == 0) {
 175                         flowmode = CAKE_FLOW_FLOWS;
 176                 } else if (strcmp(*argv, "dual-srchost") == 0) {
 177                         flowmode = CAKE_FLOW_DUAL_SRC;
 178                 } else if (strcmp(*argv, "dual-dsthost") == 0) {
 179                         flowmode = CAKE_FLOW_DUAL_DST;
 180                 } else if (strcmp(*argv, "triple-isolate") == 0) {
 181                         flowmode = CAKE_FLOW_TRIPLE;
 182                 } else if (strcmp(*argv, "nat") == 0) {
 183                         nat = 1;
 184                 } else if (strcmp(*argv, "nonat") == 0) {
 185                         nat = 0;
 186                 } else if (strcmp(*argv, "ptm") == 0) {
 187                         atm = CAKE_ATM_PTM;
 188                 } else if (strcmp(*argv, "atm") == 0) {
 189                         atm = CAKE_ATM_ATM;
 190                 } else if (strcmp(*argv, "noatm") == 0) {
 191                         atm = CAKE_ATM_NONE;
 192                 } else if (strcmp(*argv, "raw") == 0) {
 193                         atm = CAKE_ATM_NONE;
 194                         overhead = 0;
 195                         overhead_set = true;
 196                         overhead_override = true;
 197                 } else if (strcmp(*argv, "conservative") == 0) {
 198                         /*
 199                          * Deliberately over-estimate overhead:
 200                          * one whole ATM cell plus ATM framing.
 201                          * A safe choice if the actual overhead is unknown.
 202                          */
 203                         atm = CAKE_ATM_ATM;
 204                         overhead = 48;
 205                         overhead_set = true;
 206
 207                 /* Various ADSL framing schemes, all over ATM cells */
 208                 } else if (strcmp(*argv, "ipoa-vcmux") == 0) {
 209                         atm = CAKE_ATM_ATM;
 210                         overhead += 8;
 211                         overhead_set = true;
 212                 } else if (strcmp(*argv, "ipoa-llcsnap") == 0) {
 213                         atm = CAKE_ATM_ATM;
 214                         overhead += 16;
 215                         overhead_set = true;
 216                 } else if (strcmp(*argv, "bridged-vcmux") == 0) {
 217                         atm = CAKE_ATM_ATM;
 218                         overhead += 24;
 219                         overhead_set = true;
 220                 } else if (strcmp(*argv, "bridged-llcsnap") == 0) {
 221                         atm = CAKE_ATM_ATM;
 222                         overhead += 32;
 223                         overhead_set = true;
 224                 } else if (strcmp(*argv, "pppoa-vcmux") == 0) {
 225                         atm = CAKE_ATM_ATM;
 226                         overhead += 10;
 227                         overhead_set = true;
 228                 } else if (strcmp(*argv, "pppoa-llc") == 0) {
 229                         atm = CAKE_ATM_ATM;
 230                         overhead += 14;
 231                         overhead_set = true;
 232                 } else if (strcmp(*argv, "pppoe-vcmux") == 0) {
 233                         atm = CAKE_ATM_ATM;
 234                         overhead += 32;
 235                         overhead_set = true;
 236                 } else if (strcmp(*argv, "pppoe-llcsnap") == 0) {
 237                         atm = CAKE_ATM_ATM;
 238                         overhead += 40;
 239                         overhead_set = true;
 240
 241                 /* Typical VDSL2 framing schemes, both over PTM */
 242                 /* PTM has 64b/65b coding which absorbs some bandwidth */
 243                 } else if (strcmp(*argv, "pppoe-ptm") == 0) {
 244                         /* 2B PPP + 6B PPPoE + 6B dest MAC + 6B src MAC
 245                          * + 2B ethertype + 4B Frame Check Sequence
 246                          * + 1B Start of Frame (S) + 1B End of Frame (Ck)
 247                          * + 2B TC-CRC (PTM-FCS) = 30B
 248                          */
 249                         atm = CAKE_ATM_PTM;
 250                         overhead += 30;
 251                         overhead_set = true;
 252                 } else if (strcmp(*argv, "bridged-ptm") == 0) {
 253                         /* 6B dest MAC + 6B src MAC + 2B ethertype
 254                          * + 4B Frame Check Sequence
 255                          * + 1B Start of Frame (S) + 1B End of Frame (Ck)
 256                          * + 2B TC-CRC (PTM-FCS) = 22B
 257                          */
 258                         atm = CAKE_ATM_PTM;
 259                         overhead += 22;
 260                         overhead_set = true;
 261                 } else if (strcmp(*argv, "via-ethernet") == 0) {
 262                         /*
 263                          * We used to use this flag to manually compensate for
 264                          * Linux including the Ethernet header on Ethernet-type
 265                          * interfaces, but not on IP-type interfaces.
 266                          *
 267                          * It is no longer needed, because Cake now adjusts for
 268                          * that automatically, and is thus ignored.
 269                          *
 270                          * It would be deleted entirely, but it appears in the
 271                          * stats output when the automatic compensation is
 272                          * active.
 273                          */
 274                 } else if (strcmp(*argv, "ethernet") == 0) {
 275                         /* ethernet pre-amble & interframe gap & FCS
 276                          * you may need to add vlan tag
 277                          */
 278                         overhead += 38;
 279                         overhead_set = true;
 280                         mpu = 84;
 281
 282                 /* Additional Ethernet-related overhead used by some ISPs */
 283                 } else if (strcmp(*argv, "ether-vlan") == 0) {
 284                         /* 802.1q VLAN tag - may be repeated */
 285                         overhead += 4;
 286                         overhead_set = true;
 287
 288                 /*
 289                  * DOCSIS cable shapers account for Ethernet frame with FCS,
 290                  * but not interframe gap or preamble.
 291                  */
 292                 } else if (strcmp(*argv, "docsis") == 0) {
 293                         atm = CAKE_ATM_NONE;
 294                         overhead += 18;
 295                         overhead_set = true;
 296                         mpu = 64;
 297                 } else if (strcmp(*argv, "overhead") == 0) {
 298                         char *p = NULL;
 299
 300                         NEXT_ARG();
 301                         overhead = strtol(*argv, &p, 10);
 302                         if (!p || *p || !*argv ||
 303                             overhead < -64 || overhead > 256) {
 304                                 fprintf(stderr,
 305                                         "Illegal \"overhead\", valid range is -64 to 256\\n");
 306                                 return -1;
 307                         }
 308                         overhead_set = true;
 309
 310                 } else if (strcmp(*argv, "mpu") == 0) {
 311                         char *p = NULL;
 312
 313                         NEXT_ARG();
 314                         mpu = strtol(*argv, &p, 10);
 315                         if (!p || *p || !*argv || mpu < 0 || mpu > 256) {
 316                                 fprintf(stderr,
 317                                         "Illegal \"mpu\", valid range is 0 to 256\\n");
 318                                 return -1;
 319                         }
 320                 } else if (strcmp(*argv, "ingress") == 0) {
 321                         ingress = 1;
 322                 } else if (strcmp(*argv, "egress") == 0) {
 323                         ingress = 0;
 324                 } else if (strcmp(*argv, "no-ack-filter") == 0) {
 325                         ack_filter = CAKE_ACK_NONE;
 326                 } else if (strcmp(*argv, "ack-filter") == 0) {
 327                         ack_filter = CAKE_ACK_FILTER;
 328                 } else if (strcmp(*argv, "ack-filter-aggressive") == 0) {
 329                         ack_filter = CAKE_ACK_AGGRESSIVE;
 330                 } else if (strcmp(*argv, "memlimit") == 0) {
 331                         NEXT_ARG();
 332                         if (get_size(&memlimit, *argv)) {
 333                                 fprintf(stderr,
 334                                         "Illegal value for \"memlimit\": \"%s\"\n", *argv);
 335                                 return -1;
 336                         }
 337                 } else if (strcmp(*argv, "fwmark") == 0) {
 338                         NEXT_ARG();
 339                         if (get_u32(&fwmark, *argv, 0)) {
 340                                 fprintf(stderr,
 341                                         "Illegal value for \"fwmark\": \"%s\"\n", *argv);
 342                                 return -1;
 343                         }
 344                 } else if (strcmp(*argv, "help") == 0) {
 345                         explain();
 346                         return -1;
 347                 } else {
 348                         fprintf(stderr, "What is \"%s\"?\n", *argv);
 349                         explain();
 350                         return -1;
 351                 }
 352                 argc--; argv++;
 353         }
 354
 355         tail = NLMSG_TAIL(n);
 356         addattr_l(n, 1024, TCA_OPTIONS, NULL, 0);
 357         if (bandwidth || unlimited)
 358                 addattr_l(n, 1024, TCA_CAKE_BASE_RATE64, &bandwidth,
 359                           sizeof(bandwidth));
 360         if (diffserv)
 361                 addattr_l(n, 1024, TCA_CAKE_DIFFSERV_MODE, &diffserv,
 362                           sizeof(diffserv));
 363         if (atm != -1)
 364                 addattr_l(n, 1024, TCA_CAKE_ATM, &atm, sizeof(atm));
 365         if (flowmode != -1)
 366                 addattr_l(n, 1024, TCA_CAKE_FLOW_MODE, &flowmode,
 367                           sizeof(flowmode));
 368         if (overhead_set)
 369                 addattr_l(n, 1024, TCA_CAKE_OVERHEAD, &overhead,
 370                           sizeof(overhead));
 371         if (overhead_override) {
 372                 unsigned int zero = 0;
 373
 374                 addattr_l(n, 1024, TCA_CAKE_RAW, &zero, sizeof(zero));
 375         }
 376         if (mpu > 0)
 377                 addattr_l(n, 1024, TCA_CAKE_MPU, &mpu, sizeof(mpu));
 378         if (interval)
 379                 addattr_l(n, 1024, TCA_CAKE_RTT, &interval, sizeof(interval));
 380         if (target)
 381                 addattr_l(n, 1024, TCA_CAKE_TARGET, &target, sizeof(target));
 382         if (autorate != -1)
 383                 addattr_l(n, 1024, TCA_CAKE_AUTORATE, &autorate,
 384                           sizeof(autorate));
 385         if (memlimit)
 386                 addattr_l(n, 1024, TCA_CAKE_MEMORY, &memlimit,
 387                           sizeof(memlimit));
 388         if (fwmark)
 389                 addattr_l(n, 1024, TCA_CAKE_FWMARK, &fwmark,
 390                           sizeof(fwmark));
 391         if (nat != -1)
 392                 addattr_l(n, 1024, TCA_CAKE_NAT, &nat, sizeof(nat));
 393         if (wash != -1)
 394                 addattr_l(n, 1024, TCA_CAKE_WASH, &wash, sizeof(wash));
 395         if (split_gso != -1)
 396                 addattr_l(n, 1024, TCA_CAKE_SPLIT_GSO, &split_gso,
 397                           sizeof(split_gso));
 398         if (ingress != -1)
 399                 addattr_l(n, 1024, TCA_CAKE_INGRESS, &ingress, sizeof(ingress));
 400         if (ack_filter != -1)
 401                 addattr_l(n, 1024, TCA_CAKE_ACK_FILTER, &ack_filter,
 402                           sizeof(ack_filter));
 403
 404         tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
 405         return 0;
 406 }
 407
 408 static void cake_print_mode(unsigned int value, unsigned int max,
 409                             const char *key, const char **table)
 410 {
 411         if (value < max && table[value]) {
 412                 print_string(PRINT_ANY, key, "%s ", table[value]);
 413         } else {
 414                 print_string(PRINT_JSON, key, NULL, "unknown");
 415                 print_string(PRINT_FP, NULL, "(?%s?)", key);
 416         }
 417 }
 418
 419 static int cake_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
 420 {
 421         struct rtattr *tb[TCA_CAKE_MAX + 1];
 422         unsigned int interval = 0;
 423         unsigned int memlimit = 0;
 424         unsigned int fwmark = 0;
 425         __u64 bandwidth = 0;
 426         int ack_filter = 0;
 427         int split_gso = 0;
 428         int overhead = 0;
 429         int autorate = 0;
 430         int ingress = 0;
 431         int wash = 0;
 432         int raw = 0;
 433         int mpu = 0;
 434         int atm = 0;
 435         int nat = 0;
 436
 437         SPRINT_BUF(b2);
 438
 439         if (opt == NULL)
 440                 return 0;
 441
 442         parse_rtattr_nested(tb, TCA_CAKE_MAX, opt);
 443
 444         if (tb[TCA_CAKE_BASE_RATE64] &&
 445             RTA_PAYLOAD(tb[TCA_CAKE_BASE_RATE64]) >= sizeof(bandwidth)) {
 446                 bandwidth = rta_getattr_u64(tb[TCA_CAKE_BASE_RATE64]);
 447                 if (bandwidth)
 448                         tc_print_rate(PRINT_ANY, "bandwidth", "bandwidth %s ",
 449                                       bandwidth);
 450                 else
 451                         print_string(PRINT_ANY, "bandwidth", "bandwidth %s ",
 452                                      "unlimited");
 453         }
 454         if (tb[TCA_CAKE_AUTORATE] &&
 455                 RTA_PAYLOAD(tb[TCA_CAKE_AUTORATE]) >= sizeof(__u32)) {
 456                 autorate = rta_getattr_u32(tb[TCA_CAKE_AUTORATE]);
 457                 if (autorate == 1)
 458                         print_string(PRINT_ANY, "autorate", "%s ",
 459                                      "autorate-ingress");
 460                 else if (autorate)
 461                         print_string(PRINT_ANY, "autorate", "(?autorate?) ",
 462                                      "unknown");
 463         }
 464         if (tb[TCA_CAKE_DIFFSERV_MODE] &&
 465             RTA_PAYLOAD(tb[TCA_CAKE_DIFFSERV_MODE]) >= sizeof(__u32)) {
 466                 cake_print_mode(rta_getattr_u32(tb[TCA_CAKE_DIFFSERV_MODE]),
 467                                 CAKE_DIFFSERV_MAX, "diffserv", diffserv_names);
 468         }
 469         if (tb[TCA_CAKE_FLOW_MODE] &&
 470             RTA_PAYLOAD(tb[TCA_CAKE_FLOW_MODE]) >= sizeof(__u32)) {
 471                 cake_print_mode(rta_getattr_u32(tb[TCA_CAKE_FLOW_MODE]),
 472                                 CAKE_FLOW_MAX, "flowmode", flowmode_names);
 473         }
 474
 475         if (tb[TCA_CAKE_NAT] &&
 476             RTA_PAYLOAD(tb[TCA_CAKE_NAT]) >= sizeof(__u32)) {
 477                 nat = rta_getattr_u32(tb[TCA_CAKE_NAT]);
 478         }
 479
 480         if (nat)
 481                 print_string(PRINT_FP, NULL, "nat ", NULL);
 482         else
 483                 print_string(PRINT_FP, NULL, "nonat ", NULL);
 484         print_bool(PRINT_JSON, "nat", NULL, nat);
 485
 486         if (tb[TCA_CAKE_WASH] &&
 487             RTA_PAYLOAD(tb[TCA_CAKE_WASH]) >= sizeof(__u32)) {
 488                 wash = rta_getattr_u32(tb[TCA_CAKE_WASH]);
 489         }
 490         if (tb[TCA_CAKE_ATM] &&
 491             RTA_PAYLOAD(tb[TCA_CAKE_ATM]) >= sizeof(__u32)) {
 492                 atm = rta_getattr_u32(tb[TCA_CAKE_ATM]);
 493         }
 494         if (tb[TCA_CAKE_OVERHEAD] &&
 495             RTA_PAYLOAD(tb[TCA_CAKE_OVERHEAD]) >= sizeof(__s32)) {
 496                 overhead = *(__s32 *) RTA_DATA(tb[TCA_CAKE_OVERHEAD]);
 497         }
 498         if (tb[TCA_CAKE_MPU] &&
 499             RTA_PAYLOAD(tb[TCA_CAKE_MPU]) >= sizeof(__u32)) {
 500                 mpu = rta_getattr_u32(tb[TCA_CAKE_MPU]);
 501         }
 502         if (tb[TCA_CAKE_INGRESS] &&
 503             RTA_PAYLOAD(tb[TCA_CAKE_INGRESS]) >= sizeof(__u32)) {
 504                 ingress = rta_getattr_u32(tb[TCA_CAKE_INGRESS]);
 505         }
 506         if (tb[TCA_CAKE_ACK_FILTER] &&
 507             RTA_PAYLOAD(tb[TCA_CAKE_ACK_FILTER]) >= sizeof(__u32)) {
 508                 ack_filter = rta_getattr_u32(tb[TCA_CAKE_ACK_FILTER]);
 509         }
 510         if (tb[TCA_CAKE_SPLIT_GSO] &&
 511             RTA_PAYLOAD(tb[TCA_CAKE_SPLIT_GSO]) >= sizeof(__u32)) {
 512                 split_gso = rta_getattr_u32(tb[TCA_CAKE_SPLIT_GSO]);
 513         }
 514         if (tb[TCA_CAKE_RAW]) {
 515                 raw = 1;
 516         }
 517         if (tb[TCA_CAKE_RTT] &&
 518             RTA_PAYLOAD(tb[TCA_CAKE_RTT]) >= sizeof(__u32)) {
 519                 interval = rta_getattr_u32(tb[TCA_CAKE_RTT]);
 520         }
 521         if (tb[TCA_CAKE_MEMORY] &&
 522                 RTA_PAYLOAD(tb[TCA_CAKE_MEMORY]) >= sizeof(__u32)) {
 523                 memlimit = rta_getattr_u32(tb[TCA_CAKE_MEMORY]);
 524         }
 525         if (tb[TCA_CAKE_FWMARK] &&
 526             RTA_PAYLOAD(tb[TCA_CAKE_FWMARK]) >= sizeof(__u32)) {
 527                 fwmark = rta_getattr_u32(tb[TCA_CAKE_FWMARK]);
 528         }
 529
 530         if (wash)
 531                 print_string(PRINT_FP, NULL, "wash ", NULL);
 532         else
 533                 print_string(PRINT_FP, NULL, "nowash ", NULL);
 534         print_bool(PRINT_JSON, "wash", NULL, wash);
 535
 536         if (ingress)
 537                 print_string(PRINT_FP, NULL, "ingress ", NULL);
 538         print_bool(PRINT_JSON, "ingress", NULL, ingress);
 539
 540         if (ack_filter == CAKE_ACK_AGGRESSIVE)
 541                 print_string(PRINT_ANY, "ack-filter", "ack-filter-%s ",
 542                              "aggressive");
 543         else if (ack_filter == CAKE_ACK_FILTER)
 544                 print_string(PRINT_ANY, "ack-filter", "ack-filter ", "enabled");
 545         else
 546                 print_string(PRINT_ANY, "ack-filter", "no-ack-filter ", "disabled");
 547
 548         if (split_gso)
 549                 print_string(PRINT_FP, NULL, "split-gso ", NULL);
 550         else
 551                 print_string(PRINT_FP, NULL, "no-split-gso ", NULL);
 552         print_bool(PRINT_JSON, "split_gso", NULL, split_gso);
 553
 554         if (interval)
 555                 print_string(PRINT_FP, NULL, "rtt %s ",
 556                              sprint_time(interval, b2));
 557         print_uint(PRINT_JSON, "rtt", NULL, interval);
 558
 559         if (raw)
 560                 print_string(PRINT_FP, NULL, "raw ", NULL);
 561         print_bool(PRINT_JSON, "raw", NULL, raw);
 562
 563         if (atm == CAKE_ATM_ATM)
 564                 print_string(PRINT_ANY, "atm", "%s ", "atm");
 565         else if (atm == CAKE_ATM_PTM)
 566                 print_string(PRINT_ANY, "atm", "%s ", "ptm");
 567         else if (!raw)
 568                 print_string(PRINT_ANY, "atm", "%s ", "noatm");
 569
 570         print_int(PRINT_ANY, "overhead", "overhead %d ", overhead);
 571
 572         if (mpu)
 573                 print_uint(PRINT_ANY, "mpu", "mpu %u ", mpu);
 574
 575         if (memlimit)
 576                 print_size(PRINT_ANY, "memlimit", "memlimit %s ", memlimit);
 577
 578         if (fwmark)
 579                 print_uint(PRINT_FP, NULL, "fwmark 0x%x ", fwmark);
 580         print_0xhex(PRINT_JSON, "fwmark", NULL, fwmark);
 581
 582         return 0;
 583 }
 584
 585 static void cake_print_json_tin(struct rtattr **tstat)
 586 {
 587 #define PRINT_TSTAT_JSON(type, name, attr) if (tstat[TCA_CAKE_TIN_STATS_ ## attr]) \
 588                 print_u64(PRINT_JSON, name, NULL,                       \
 589                         rta_getattr_ ## type((struct rtattr *)          \
 590                                              tstat[TCA_CAKE_TIN_STATS_ ## attr]))
 591
 592         open_json_object(NULL);
 593         PRINT_TSTAT_JSON(u64, "threshold_rate", THRESHOLD_RATE64);
 594         PRINT_TSTAT_JSON(u64, "sent_bytes", SENT_BYTES64);
 595         PRINT_TSTAT_JSON(u32, "backlog_bytes", BACKLOG_BYTES);
 596         PRINT_TSTAT_JSON(u32, "target_us", TARGET_US);
 597         PRINT_TSTAT_JSON(u32, "interval_us", INTERVAL_US);
 598         PRINT_TSTAT_JSON(u32, "peak_delay_us", PEAK_DELAY_US);
 599         PRINT_TSTAT_JSON(u32, "avg_delay_us", AVG_DELAY_US);
 600         PRINT_TSTAT_JSON(u32, "base_delay_us", BASE_DELAY_US);
 601         PRINT_TSTAT_JSON(u32, "sent_packets", SENT_PACKETS);
 602         PRINT_TSTAT_JSON(u32, "way_indirect_hits", WAY_INDIRECT_HITS);
 603         PRINT_TSTAT_JSON(u32, "way_misses", WAY_MISSES);
 604         PRINT_TSTAT_JSON(u32, "way_collisions", WAY_COLLISIONS);
 605         PRINT_TSTAT_JSON(u32, "drops", DROPPED_PACKETS);
 606         PRINT_TSTAT_JSON(u32, "ecn_mark", ECN_MARKED_PACKETS);
 607         PRINT_TSTAT_JSON(u32, "ack_drops", ACKS_DROPPED_PACKETS);
 608         PRINT_TSTAT_JSON(u32, "sparse_flows", SPARSE_FLOWS);
 609         PRINT_TSTAT_JSON(u32, "bulk_flows", BULK_FLOWS);
 610         PRINT_TSTAT_JSON(u32, "unresponsive_flows", UNRESPONSIVE_FLOWS);
 611         PRINT_TSTAT_JSON(u32, "max_pkt_len", MAX_SKBLEN);
 612         PRINT_TSTAT_JSON(u32, "flow_quantum", FLOW_QUANTUM);
 613         close_json_object();
 614
 615 #undef PRINT_TSTAT_JSON
 616 }
 617
 618 static int cake_print_xstats(struct qdisc_util *qu, FILE *f,
 619                              struct rtattr *xstats)
 620 {
 621         struct rtattr *st[TCA_CAKE_STATS_MAX + 1];
 622         SPRINT_BUF(b1);
 623         int i;
 624
 625         if (xstats == NULL)
 626                 return 0;
 627
 628 #define GET_STAT_U32(attr) rta_getattr_u32(st[TCA_CAKE_STATS_ ## attr])
 629 #define GET_STAT_S32(attr) (*(__s32 *)RTA_DATA(st[TCA_CAKE_STATS_ ## attr]))
 630 #define GET_STAT_U64(attr) rta_getattr_u64(st[TCA_CAKE_STATS_ ## attr])
 631
 632         parse_rtattr_nested(st, TCA_CAKE_STATS_MAX, xstats);
 633
 634         if (st[TCA_CAKE_STATS_MEMORY_USED] &&
 635             st[TCA_CAKE_STATS_MEMORY_LIMIT]) {
 636                 print_size(PRINT_FP, NULL, " memory used: %s",
 637                            GET_STAT_U32(MEMORY_USED));
 638
 639                 print_size(PRINT_FP, NULL, " of %s\n",
 640                            GET_STAT_U32(MEMORY_LIMIT));
 641
 642                 print_uint(PRINT_JSON, "memory_used", NULL,
 643                         GET_STAT_U32(MEMORY_USED));
 644                 print_uint(PRINT_JSON, "memory_limit", NULL,
 645                         GET_STAT_U32(MEMORY_LIMIT));
 646         }
 647
 648         if (st[TCA_CAKE_STATS_CAPACITY_ESTIMATE64])
 649                 tc_print_rate(PRINT_ANY, "capacity_estimate",
 650                               " capacity estimate: %s\n",
 651                               GET_STAT_U64(CAPACITY_ESTIMATE64));
 652
 653         if (st[TCA_CAKE_STATS_MIN_NETLEN] &&
 654             st[TCA_CAKE_STATS_MAX_NETLEN]) {
 655                 print_uint(PRINT_ANY, "min_network_size",
 656                            " min/max network layer size: %12u",
 657                            GET_STAT_U32(MIN_NETLEN));
 658                 print_uint(PRINT_ANY, "max_network_size",
 659                            " /%8u\n", GET_STAT_U32(MAX_NETLEN));
 660         }
 661
 662         if (st[TCA_CAKE_STATS_MIN_ADJLEN] &&
 663             st[TCA_CAKE_STATS_MAX_ADJLEN]) {
 664                 print_uint(PRINT_ANY, "min_adj_size",
 665                            " min/max overhead-adjusted size: %8u",
 666                            GET_STAT_U32(MIN_ADJLEN));
 667                 print_uint(PRINT_ANY, "max_adj_size",
 668                            " /%8u\n", GET_STAT_U32(MAX_ADJLEN));
 669         }
 670
 671         if (st[TCA_CAKE_STATS_AVG_NETOFF])
 672                 print_uint(PRINT_ANY, "avg_hdr_offset",
 673                            " average network hdr offset: %12u\n\n",
 674                            GET_STAT_U32(AVG_NETOFF));
 675
 676         /* class stats */
 677         if (st[TCA_CAKE_STATS_DEFICIT])
 678                 print_int(PRINT_ANY, "deficit", "  deficit %u",
 679                           GET_STAT_S32(DEFICIT));
 680         if (st[TCA_CAKE_STATS_COBALT_COUNT])
 681                 print_uint(PRINT_ANY, "count", " count %u",
 682                            GET_STAT_U32(COBALT_COUNT));
 683
 684         if (st[TCA_CAKE_STATS_DROPPING] && GET_STAT_U32(DROPPING)) {
 685                 print_bool(PRINT_ANY, "dropping", " dropping", true);
 686                 if (st[TCA_CAKE_STATS_DROP_NEXT_US]) {
 687                         int drop_next = GET_STAT_S32(DROP_NEXT_US);
 688
 689                         if (drop_next < 0) {
 690                                 print_string(PRINT_FP, NULL, " drop_next -%s",
 691                                         sprint_time(drop_next, b1));
 692                         } else {
 693                                 print_uint(PRINT_JSON, "drop_next", NULL,
 694                                         drop_next);
 695                                 print_string(PRINT_FP, NULL, " drop_next %s",
 696                                         sprint_time(drop_next, b1));
 697                         }
 698                 }
 699         }
 700
 701         if (st[TCA_CAKE_STATS_P_DROP]) {
 702                 print_uint(PRINT_ANY, "blue_prob", " blue_prob %u",
 703                            GET_STAT_U32(P_DROP));
 704                 if (st[TCA_CAKE_STATS_BLUE_TIMER_US]) {
 705                         int blue_timer = GET_STAT_S32(BLUE_TIMER_US);
 706
 707                         if (blue_timer < 0) {
 708                                 print_string(PRINT_FP, NULL, " blue_timer -%s",
 709                                         sprint_time(blue_timer, b1));
 710                         } else {
 711                                 print_uint(PRINT_JSON, "blue_timer", NULL,
 712                                         blue_timer);
 713                                 print_string(PRINT_FP, NULL, " blue_timer %s",
 714                                         sprint_time(blue_timer, b1));
 715                         }
 716                 }
 717         }
 718
 719 #undef GET_STAT_U32
 720 #undef GET_STAT_S32
 721 #undef GET_STAT_U64
 722
 723         if (st[TCA_CAKE_STATS_TIN_STATS]) {
 724                 struct rtattr *tstat[TC_CAKE_MAX_TINS][TCA_CAKE_TIN_STATS_MAX + 1];
 725                 struct rtattr *tins[TC_CAKE_MAX_TINS + 1];
 726                 int num_tins = 0;
 727
 728                 parse_rtattr_nested(tins, TC_CAKE_MAX_TINS,
 729                                     st[TCA_CAKE_STATS_TIN_STATS]);
 730
 731                 for (i = 1; i <= TC_CAKE_MAX_TINS && tins[i]; i++) {
 732                         parse_rtattr_nested(tstat[i-1], TCA_CAKE_TIN_STATS_MAX,
 733                                             tins[i]);
 734                         num_tins++;
 735                 }
 736
 737                 if (!num_tins)
 738                         return 0;
 739
 740                 if (is_json_context()) {
 741                         open_json_array(PRINT_JSON, "tins");
 742                         for (i = 0; i < num_tins; i++)
 743                                 cake_print_json_tin(tstat[i]);
 744                         close_json_array(PRINT_JSON, NULL);
 745
 746                         return 0;
 747                 }
 748
 749
 750                 switch (num_tins) {
 751                 case 3:
 752                         fprintf(f, "                   Bulk  Best Effort        Voice\n");
 753                         break;
 754
 755                 case 4:
 756                         fprintf(f, "                   Bulk  Best Effort        Video        Voice\n");
 757                         break;
 758
 759                 default:
 760                         fprintf(f, "          ");
 761                         for (i = 0; i < num_tins; i++)
 762                                 fprintf(f, "        Tin %u", i);
 763                         fprintf(f, "%s", _SL_);
 764                 };
 765
 766 #define GET_TSTAT(i, attr) (tstat[i][TCA_CAKE_TIN_STATS_ ## attr])
 767 #define PRINT_TSTAT(name, attr, fmts, val)      do {            \
 768                         if (GET_TSTAT(0, attr)) {               \
 769                                 fprintf(f, name);               \
 770                                 for (i = 0; i < num_tins; i++)  \
 771                                         fprintf(f, " %12" fmts, val);   \
 772                                 fprintf(f, "%s", _SL_);                 \
 773                         }                                               \
 774                 } while (0)
 775
 776 #define SPRINT_TSTAT(pfunc, type, name, attr) PRINT_TSTAT(              \
 777                         name, attr, "s", sprint_ ## pfunc(              \
 778                                 rta_getattr_ ## type(GET_TSTAT(i, attr)), b1))
 779
 780 #define PRINT_TSTAT_U32(name, attr)     PRINT_TSTAT(                    \
 781                         name, attr, "u", rta_getattr_u32(GET_TSTAT(i, attr)))
 782
 783 #define PRINT_TSTAT_U64(name, attr)     PRINT_TSTAT(                    \
 784                         name, attr, "llu", rta_getattr_u64(GET_TSTAT(i, attr)))
 785
 786                 if (GET_TSTAT(0, THRESHOLD_RATE64)) {
 787                         fprintf(f, "  thresh  ");
 788                         for (i = 0; i < num_tins; i++)
 789                                 tc_print_rate(PRINT_FP, NULL, " %12s",
 790                                               rta_getattr_u64(GET_TSTAT(i, THRESHOLD_RATE64)));
 791                         fprintf(f, "%s", _SL_);
 792                 }
 793
 794                 SPRINT_TSTAT(time, u32, "  target  ", TARGET_US);
 795                 SPRINT_TSTAT(time, u32, "  interval", INTERVAL_US);
 796                 SPRINT_TSTAT(time, u32, "  pk_delay", PEAK_DELAY_US);
 797                 SPRINT_TSTAT(time, u32, "  av_delay", AVG_DELAY_US);
 798                 SPRINT_TSTAT(time, u32, "  sp_delay", BASE_DELAY_US);
 799                 SPRINT_TSTAT(size, u32, "  backlog ", BACKLOG_BYTES);
 800
 801                 PRINT_TSTAT_U32("  pkts    ", SENT_PACKETS);
 802                 PRINT_TSTAT_U64("  bytes   ", SENT_BYTES64);
 803
 804                 PRINT_TSTAT_U32("  way_inds", WAY_INDIRECT_HITS);
 805                 PRINT_TSTAT_U32("  way_miss", WAY_MISSES);
 806                 PRINT_TSTAT_U32("  way_cols", WAY_COLLISIONS);
 807                 PRINT_TSTAT_U32("  drops   ", DROPPED_PACKETS);
 808                 PRINT_TSTAT_U32("  marks   ", ECN_MARKED_PACKETS);
 809                 PRINT_TSTAT_U32("  ack_drop", ACKS_DROPPED_PACKETS);
 810                 PRINT_TSTAT_U32("  sp_flows", SPARSE_FLOWS);
 811                 PRINT_TSTAT_U32("  bk_flows", BULK_FLOWS);
 812                 PRINT_TSTAT_U32("  un_flows", UNRESPONSIVE_FLOWS);
 813                 PRINT_TSTAT_U32("  max_len ", MAX_SKBLEN);
 814                 PRINT_TSTAT_U32("  quantum ", FLOW_QUANTUM);
 815
 816 #undef GET_STAT
 817 #undef PRINT_TSTAT
 818 #undef SPRINT_TSTAT
 819 #undef PRINT_TSTAT_U32
 820 #undef PRINT_TSTAT_U64
 821         }
 822         return 0;
 823 }
 824
 825 struct qdisc_util cake_qdisc_util = {
 826         .id             = "cake",
 827         .parse_qopt     = cake_parse_opt,
 828         .print_qopt     = cake_print_opt,
 829         .print_xstats   = cake_print_xstats,
 830 };