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