src/plugin_tc.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <sys/types.h>
   8 #include <sys/resource.h>
   9
  10 #include "avl.h"
  11 #include "log.h"
  12 #include "common.h"
  13 #include "appconfig.h"
  14 #include "rrd.h"
  15 #include "popen.h"
  16 #include "plugin_tc.h"
  17 #include "main.h"
  18 #include "../config.h"
  19
  20 #define RRD_TYPE_TC                                     "tc"
  21 #define RRD_TYPE_TC_LEN                         strlen(RRD_TYPE_TC)
  22
  23 // ----------------------------------------------------------------------------
  24 // /sbin/tc processor
  25 // this requires the script plugins.d/tc-qos-helper.sh
  26
  27 #define TC_LINE_MAX 1024
  28
  29 struct tc_class {
  30         avl avl;
  31
  32         char *id;
  33         uint32_t hash;
  34
  35         char *name;
  36
  37         char *leafid;
  38         uint32_t leaf_hash;
  39
  40         char *parentid;
  41         uint32_t parent_hash;
  42
  43         char hasparent;
  44         char isleaf;
  45         unsigned long long bytes;
  46         unsigned long long packets;
  47         unsigned long long dropped;
  48         unsigned long long overlimits;
  49         unsigned long long requeues;
  50         unsigned long long lended;
  51         unsigned long long borrowed;
  52         unsigned long long giants;
  53         unsigned long long tokens;
  54         unsigned long long ctokens;
  55
  56         char updated;   // updated bytes
  57         char seen;              // seen in the tc list (even without bytes)
  58
  59         struct tc_class *next;
  60         struct tc_class *prev;
  61 };
  62
  63 struct tc_device {
  64         avl avl;
  65
  66         char *id;
  67         uint32_t hash;
  68
  69         char *name;
  70         char *family;
  71
  72         avl_tree classes_index;
  73
  74         struct tc_class *classes;
  75
  76         struct tc_device *next;
  77         struct tc_device *prev;
  78 };
  79
  80
  81 struct tc_device *tc_device_root = NULL;
  82
  83 // ----------------------------------------------------------------------------
  84 // tc_device index
  85
  86 static int tc_device_compare(void* a, void* b) {
  87         if(((struct tc_device *)a)->hash < ((struct tc_device *)b)->hash) return -1;
  88         else if(((struct tc_device *)a)->hash > ((struct tc_device *)b)->hash) return 1;
  89         else return strcmp(((struct tc_device *)a)->id, ((struct tc_device *)b)->id);
  90 }
  91
  92 avl_tree tc_device_root_index = {
  93                 NULL,
  94                 tc_device_compare
  95 };
  96
  97 #define tc_device_index_add(st) avl_insert(&tc_device_root_index, (avl *)(st))
  98 #define tc_device_index_del(st) avl_remove(&tc_device_root_index, (avl *)(st))
  99
 100 static inline struct tc_device *tc_device_index_find(const char *id, uint32_t hash) {
 101         struct tc_device tmp;
 102         tmp.id = (char *)id;
 103         tmp.hash = (hash)?hash:simple_hash(tmp.id);
 104
 105         return (struct tc_device *)avl_search(&(tc_device_root_index), (avl *)&tmp);
 106 }
 107
 108
 109 // ----------------------------------------------------------------------------
 110 // tc_class index
 111
 112 static int tc_class_compare(void* a, void* b) {
 113         if(((struct tc_class *)a)->hash < ((struct tc_class *)b)->hash) return -1;
 114         else if(((struct tc_class *)a)->hash > ((struct tc_class *)b)->hash) return 1;
 115         else return strcmp(((struct tc_class *)a)->id, ((struct tc_class *)b)->id);
 116 }
 117
 118 #define tc_class_index_add(st, rd) avl_insert(&((st)->classes_index), (avl *)(rd))
 119 #define tc_class_index_del(st, rd) avl_remove(&((st)->classes_index), (avl *)(rd))
 120
 121 static inline struct tc_class *tc_class_index_find(struct tc_device *st, const char *id, uint32_t hash) {
 122         struct tc_class tmp;
 123         tmp.id = (char *)id;
 124         tmp.hash = (hash)?hash:simple_hash(tmp.id);
 125
 126         return (struct tc_class *)avl_search(&(st->classes_index), (avl *) &tmp);
 127 }
 128
 129 // ----------------------------------------------------------------------------
 130
 131 static inline void tc_class_free(struct tc_device *n, struct tc_class *c) {
 132         debug(D_TC_LOOP, "Removing from device '%s' class '%s', parentid '%s', leafid '%s', seen=%d", n->id, c->id, c->parentid?c->parentid:"", c->leafid?c->leafid:"", c->seen);
 133
 134         if(c->next) c->next->prev = c->prev;
 135         if(c->prev) c->prev->next = c->next;
 136         if(n->classes == c) {
 137                 if(c->next) n->classes = c->next;
 138                 else n->classes = c->prev;
 139         }
 140
 141         tc_class_index_del(n, c);
 142
 143         if(c->id) free(c->id);
 144         if(c->name) free(c->name);
 145         if(c->leafid) free(c->leafid);
 146         if(c->parentid) free(c->parentid);
 147
 148         free(c);
 149 }
 150
 151 static inline void tc_device_classes_cleanup(struct tc_device *d) {
 152         static int cleanup_every = 999;
 153
 154         if(cleanup_every > 0) {
 155                 cleanup_every = (int) -config_get_number("plugin:tc", "cleanup unused classes every", 60);
 156                 if(cleanup_every > 0) cleanup_every = -cleanup_every;
 157                 if(cleanup_every == 0) cleanup_every = -1;
 158         }
 159
 160         struct tc_class *c = d->classes;
 161         while(c) {
 162                 if(c->seen < cleanup_every) {
 163                         struct tc_class *nc = c->next;
 164                         tc_class_free(d, c);
 165                         c = nc;
 166                 }
 167                 else c = c->next;
 168
 169                 if(c) {
 170                         c->updated = 0;
 171                         c->seen--;
 172                 }
 173         }
 174 }
 175
 176 static inline void tc_device_commit(struct tc_device *d)
 177 {
 178         static int enable_new_interfaces = -1;
 179
 180         if(enable_new_interfaces == -1) enable_new_interfaces = config_get_boolean("plugin:tc", "enable new interfaces detected at runtime", 1);
 181
 182         // we only need to add leaf classes
 183         struct tc_class *c, *x;
 184
 185         // set all classes
 186         for(c = d->classes ; c ; c = c->next) {
 187                 c->isleaf = 1;
 188                 c->hasparent = 0;
 189         }
 190
 191         // mark the classes as leafs and parents
 192         for(c = d->classes ; c ; c = c->next) {
 193                 if(!c->updated) continue;
 194
 195                 for(x = d->classes ; x ; x = x->next) {
 196                         if(!x->updated) continue;
 197
 198                         if(c == x) continue;
 199
 200                         if(x->parentid && (
 201                                 (               c->hash      == x->parent_hash && strcmp(c->id,     x->parentid) == 0) ||
 202                                 (c->leafid   && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0))) {
 203                                 // debug(D_TC_LOOP, "TC: In device '%s', class '%s' (leafid: '%s') has as leaf class '%s' (parentid: '%s').", d->name?d->name:d->id, c->name?c->name:c->id, c->leafid?c->leafid:c->id, x->name?x->name:x->id, x->parentid?x->parentid:x->id);
 204                                 c->isleaf = 0;
 205                                 x->hasparent = 1;
 206                         }
 207                 }
 208         }
 209
 210         // debugging:
 211         /*
 212         for ( c = d->classes ; c ; c = c->next) {
 213                 if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device %s, class %s, OK", d->name, c->id);
 214                 else debug(D_TC_LOOP, "TC: Device %s, class %s, IGNORE (isleaf: %d, hasparent: %d, parent: %s)", d->name, c->id, c->isleaf, c->hasparent, c->parentid);
 215         }
 216         */
 217
 218         // we need at least a class
 219         for(c = d->classes ; c ; c = c->next) {
 220                 // debug(D_TC_LOOP, "TC: Device '%s', class '%s', isLeaf=%d, HasParent=%d, Seen=%d", d->name?d->name:d->id, c->name?c->name:c->id, c->isleaf, c->hasparent, c->seen);
 221                 if(!c->updated) continue;
 222                 if(c->isleaf && c->hasparent) break;
 223         }
 224         if(!c) {
 225                 debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No leaf classes.", d->name?d->name:d->id);
 226                 tc_device_classes_cleanup(d);
 227                 return;
 228         }
 229
 230         char var_name[CONFIG_MAX_NAME + 1];
 231         snprintfz(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
 232         if(config_get_boolean("plugin:tc", var_name, enable_new_interfaces)) {
 233                 RRDSET *st = rrdset_find_bytype(RRD_TYPE_TC, d->id);
 234                 if(!st) {
 235                         debug(D_TC_LOOP, "TC: Creating new chart for device '%s'", d->name?d->name:d->id);
 236
 237                         st = rrdset_create(RRD_TYPE_TC, d->id, d->name?d->name:d->id, d->family?d->family:d->id, RRD_TYPE_TC ".qos", "Class Usage", "kilobits/s", 7000, rrd_update_every, RRDSET_TYPE_STACKED);
 238
 239                         for(c = d->classes ; c ; c = c->next) {
 240                                 if(!c->updated) continue;
 241
 242                                 if(c->isleaf && c->hasparent)
 243                                         rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 244                         }
 245                 }
 246                 else {
 247                         debug(D_TC_LOOP, "TC: Updating chart for device '%s'", d->name?d->name:d->id);
 248                         rrdset_next_plugins(st);
 249
 250                         if(d->name && strcmp(d->id, d->name) != 0) rrdset_set_name(st, d->name);
 251                 }
 252
 253                 for(c = d->classes ; c ; c = c->next) {
 254                         if(!c->updated) continue;
 255
 256                         if(c->isleaf && c->hasparent) {
 257                                 RRDDIM *rd = rrddim_find(st, c->id);
 258
 259                                 if(!rd) {
 260                                         debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s' (name: '%s')", st->id, c->id, c->name);
 261
 262                                         // new class, we have to add it
 263                                         rd = rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 264                                 }
 265                                 else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", st->id, c->id);
 266
 267                                 rrddim_set_by_pointer(st, rd, c->bytes);
 268
 269                                 // if it has a name, different to the id
 270                                 if(c->name) {
 271                                         // update the rrd dimension with the new name
 272                                         debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", st->id, rd->id, c->name);
 273                                         rrddim_set_name(st, rd, c->name);
 274
 275                                         free(c->name);
 276                                         c->name = NULL;
 277                                 }
 278                         }
 279                 }
 280                 rrdset_done(st);
 281         }
 282
 283         tc_device_classes_cleanup(d);
 284 }
 285
 286 static inline void tc_device_set_class_name(struct tc_device *d, char *id, char *name)
 287 {
 288         struct tc_class *c = tc_class_index_find(d, id, 0);
 289         if(c) {
 290                 if(c->name) free(c->name);
 291                 c->name = NULL;
 292
 293                 if(name && *name && strcmp(c->id, name) != 0) {
 294                         debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
 295                         c->name = strdup(name);
 296                 }
 297         }
 298 }
 299
 300 static inline void tc_device_set_device_name(struct tc_device *d, char *name) {
 301         if(d->name) free(d->name);
 302         d->name = NULL;
 303
 304         if(name && *name && strcmp(d->id, name) != 0) {
 305                 debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
 306                 d->name = strdup(name);
 307         }
 308 }
 309
 310 static inline void tc_device_set_device_family(struct tc_device *d, char *family) {
 311         if(d->family) free(d->family);
 312         d->family = NULL;
 313
 314         if(family && *family && strcmp(d->id, family) != 0) {
 315                 debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
 316                 d->family = strdup(family);
 317         }
 318         // no need for null termination - it is already null
 319 }
 320
 321 static inline struct tc_device *tc_device_create(char *id)
 322 {
 323         struct tc_device *d = tc_device_index_find(id, 0);
 324
 325         if(!d) {
 326                 debug(D_TC_LOOP, "TC: Creating device '%s'", id);
 327
 328                 d = calloc(1, sizeof(struct tc_device));
 329                 if(!d) {
 330                         fatal("Cannot allocate memory for tc_device %s", id);
 331                         return NULL;
 332                 }
 333
 334                 d->id = strdup(id);
 335                 d->hash = simple_hash(d->id);
 336
 337                 avl_init(&d->classes_index, tc_class_compare);
 338                 tc_device_index_add(d);
 339
 340                 if(!tc_device_root) {
 341                         tc_device_root = d;
 342                 }
 343                 else {
 344                         d->next = tc_device_root;
 345                         tc_device_root->prev = d;
 346                         tc_device_root = d;
 347                 }
 348         }
 349
 350         return(d);
 351 }
 352
 353 static inline struct tc_class *tc_class_add(struct tc_device *n, char *id, char *parentid, char *leafid)
 354 {
 355         struct tc_class *c = tc_class_index_find(n, id, 0);
 356
 357         if(!c) {
 358                 debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
 359
 360                 c = calloc(1, sizeof(struct tc_class));
 361                 if(!c) {
 362                         fatal("Cannot allocate memory for tc class");
 363                         return NULL;
 364                 }
 365
 366                 if(n->classes) n->classes->prev = c;
 367                 c->next = n->classes;
 368                 n->classes = c;
 369
 370                 c->id = strdup(id);
 371                 if(!c->id) {
 372                         free(c);
 373                         return NULL;
 374                 }
 375                 c->hash = simple_hash(c->id);
 376
 377                 if(parentid && *parentid) {
 378                         c->parentid = strdup(parentid);
 379                         c->parent_hash = simple_hash(c->parentid);
 380                 }
 381
 382                 if(leafid && *leafid) {
 383                         c->leafid = strdup(leafid);
 384                         c->leaf_hash = simple_hash(c->leafid);
 385                 }
 386
 387                 tc_class_index_add(n, c);
 388         }
 389
 390         c->seen = 1;
 391
 392         return(c);
 393 }
 394
 395 static inline void tc_device_free(struct tc_device *n)
 396 {
 397         if(n->next) n->next->prev = n->prev;
 398         if(n->prev) n->prev->next = n->next;
 399         if(tc_device_root == n) {
 400                 if(n->next) tc_device_root = n->next;
 401                 else tc_device_root = n->prev;
 402         }
 403
 404         tc_device_index_del(n);
 405
 406         while(n->classes) tc_class_free(n, n->classes);
 407
 408         if(n->id) free(n->id);
 409         if(n->name) free(n->name);
 410         if(n->family) free(n->family);
 411
 412         free(n);
 413 }
 414
 415 static inline void tc_device_free_all()
 416 {
 417         while(tc_device_root)
 418                 tc_device_free(tc_device_root);
 419 }
 420
 421 #define MAX_WORDS 20
 422
 423 static inline int tc_space(char c) {
 424         switch(c) {
 425         case ' ':
 426         case '\t':
 427         case '\r':
 428         case '\n':
 429                 return 1;
 430
 431         default:
 432                 return 0;
 433         }
 434 }
 435
 436 static inline void tc_split_words(char *str, char **words, int max_words) {
 437         char *s = str;
 438         int i = 0;
 439
 440         // skip all white space
 441         while(tc_space(*s)) s++;
 442
 443         // store the first word
 444         words[i++] = s;
 445
 446         // while we have something
 447         while(*s) {
 448                 // if it is a space
 449                 if(tc_space(*s)) {
 450
 451                         // terminate the word
 452                         *s++ = '\0';
 453
 454                         // skip all white space
 455                         while(tc_space(*s)) s++;
 456
 457                         // if we reached the end, stop
 458                         if(!*s) break;
 459
 460                         // store the next word
 461                         if(i < max_words) words[i++] = s;
 462                         else break;
 463                 }
 464                 else s++;
 465         }
 466
 467         // terminate the words
 468         while(i < max_words) words[i++] = NULL;
 469 }
 470
 471 pid_t tc_child_pid = 0;
 472 void *tc_main(void *ptr)
 473 {
 474         if(ptr) { ; }
 475
 476         info("TC thread created with task id %d", gettid());
 477
 478         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 479                 error("Cannot set pthread cancel type to DEFERRED.");
 480
 481         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 482                 error("Cannot set pthread cancel state to ENABLE.");
 483
 484         struct rusage thread;
 485         RRDSET *stcpu = NULL, *sttime = NULL;
 486
 487         char buffer[TC_LINE_MAX+1] = "";
 488         char *words[MAX_WORDS] = { NULL };
 489
 490         uint32_t BEGIN_HASH = simple_hash("BEGIN");
 491         uint32_t END_HASH = simple_hash("END");
 492         uint32_t CLASS_HASH = simple_hash("class");
 493         uint32_t SENT_HASH = simple_hash("Sent");
 494         uint32_t LENDED_HASH = simple_hash("lended:");
 495         uint32_t TOKENS_HASH = simple_hash("tokens:");
 496         uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
 497         uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
 498         uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
 499         uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
 500 #ifdef DETACH_PLUGINS_FROM_NETDATA
 501         uint32_t MYPID_HASH = simple_hash("MYPID");
 502 #endif
 503         uint32_t first_hash;
 504
 505         for(;1;) {
 506                 if(unlikely(netdata_exit)) break;
 507
 508                 FILE *fp;
 509                 struct tc_device *device = NULL;
 510                 struct tc_class *class = NULL;
 511
 512                 snprintfz(buffer, TC_LINE_MAX, "exec %s %d", config_get("plugin:tc", "script to run to get tc values", PLUGINS_DIR "/tc-qos-helper.sh"), rrd_update_every);
 513                 debug(D_TC_LOOP, "executing '%s'", buffer);
 514                 // fp = popen(buffer, "r");
 515                 fp = mypopen(buffer, &tc_child_pid);
 516                 if(!fp) {
 517                         error("TC: Cannot popen(\"%s\", \"r\").", buffer);
 518                         pthread_exit(NULL);
 519                         return NULL;
 520                 }
 521
 522                 while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
 523                         if(unlikely(netdata_exit)) break;
 524
 525                         buffer[TC_LINE_MAX] = '\0';
 526                         // debug(D_TC_LOOP, "TC: read '%s'", buffer);
 527
 528                         tc_split_words(buffer, words, MAX_WORDS);
 529                         if(!words[0] || !*words[0]) {
 530                                 // debug(D_TC_LOOP, "empty line");
 531                                 continue;
 532                         }
 533                         // else debug(D_TC_LOOP, "First word is '%s'", words[0]);
 534
 535                         first_hash = simple_hash(words[0]);
 536
 537                         if(device && first_hash == CLASS_HASH && strcmp(words[0], "class") == 0) {
 538                                 // debug(D_TC_LOOP, "CLASS line on class id='%s', parent='%s', parentid='%s', leaf='%s', leafid='%s'", words[2], words[3], words[4], words[5], words[6]);
 539
 540                                 // clear the last class
 541                                 class = NULL;
 542
 543                                 // words[1] : class type
 544                                 // words[2] : N:XX
 545                                 // words[3] : parent or root
 546                                 if(words[1] && words[2] && words[3] && (strcmp(words[3], "parent") == 0 || strcmp(words[3], "root") == 0)) {
 547                                         //char *type     = words[1];  // the class: htb, fq_codel, etc
 548
 549                                         // we are only interested for HTB classes
 550                                         //if(strcmp(type, "htb") != 0) continue;
 551
 552                                         char *id       = words[2];      // the class major:minor
 553                                         char *parent   = words[3];      // 'parent' or 'root'
 554                                         char *parentid = words[4];      // the parent's id
 555                                         char *leaf     = words[5];      // 'leaf'
 556                                         char *leafid   = words[6];      // leafid
 557
 558                                         if(strcmp(parent, "root") == 0) {
 559                                                 parentid = NULL;
 560                                                 leafid = NULL;
 561                                         }
 562                                         else if(!leaf || strcmp(leaf, "leaf") != 0)
 563                                                 leafid = NULL;
 564
 565                                         char leafbuf[20 + 1] = "";
 566                                         if(leafid && leafid[strlen(leafid) - 1] == ':') {
 567                                                 strncpyz(leafbuf, leafid, 20 - 1);
 568                                                 strcat(leafbuf, "1");
 569                                                 leafid = leafbuf;
 570                                         }
 571
 572                                         class = tc_class_add(device, id, parentid, leafid);
 573                                 }
 574                         }
 575                         else if(first_hash == END_HASH && strcmp(words[0], "END") == 0) {
 576                                 // debug(D_TC_LOOP, "END line");
 577
 578                                 if(device) {
 579                                         if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 580                                                 error("Cannot set pthread cancel state to DISABLE.");
 581
 582                                         tc_device_commit(device);
 583                                         // tc_device_free(device);
 584                                         device = NULL;
 585                                         class = NULL;
 586
 587                                         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 588                                                 error("Cannot set pthread cancel state to ENABLE.");
 589                                 }
 590                         }
 591                         else if(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0) {
 592                                 // debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
 593
 594                                 if(device) {
 595                                         // tc_device_free(device);
 596                                         device = NULL;
 597                                         class = NULL;
 598                                 }
 599
 600                                 if(words[1] && *words[1]) {
 601                                         device = tc_device_create(words[1]);
 602                                         class = NULL;
 603                                 }
 604                         }
 605                         else if(device && class && first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0) {
 606                                 // debug(D_TC_LOOP, "SENT line '%s'", words[1]);
 607                                 if(words[1] && *words[1]) {
 608                                         class->bytes = strtoull(words[1], NULL, 10);
 609                                         class->updated = 1;
 610                                 }
 611
 612                                 if(words[3] && *words[3])
 613                                         class->packets = strtoull(words[3], NULL, 10);
 614
 615                                 if(words[6] && *words[6])
 616                                         class->dropped = strtoull(words[6], NULL, 10);
 617
 618                                 if(words[8] && *words[8])
 619                                         class->overlimits = strtoull(words[8], NULL, 10);
 620
 621                                 if(words[10] && *words[10])
 622                                         class->requeues = strtoull(words[8], NULL, 10);
 623                         }
 624                         else if(device && class && class->updated && first_hash == LENDED_HASH && strcmp(words[0], "lended:") == 0) {
 625                                 // debug(D_TC_LOOP, "LENDED line '%s'", words[1]);
 626                                 if(words[1] && *words[1])
 627                                         class->lended = strtoull(words[1], NULL, 10);
 628
 629                                 if(words[3] && *words[3])
 630                                         class->borrowed = strtoull(words[3], NULL, 10);
 631
 632                                 if(words[5] && *words[5])
 633                                         class->giants = strtoull(words[5], NULL, 10);
 634                         }
 635                         else if(device && class && class->updated && first_hash == TOKENS_HASH && strcmp(words[0], "tokens:") == 0) {
 636                                 // debug(D_TC_LOOP, "TOKENS line '%s'", words[1]);
 637                                 if(words[1] && *words[1])
 638                                         class->tokens = strtoull(words[1], NULL, 10);
 639
 640                                 if(words[3] && *words[3])
 641                                         class->ctokens = strtoull(words[3], NULL, 10);
 642                         }
 643                         else if(device && first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0) {
 644                                 // debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
 645                                 if(words[1] && *words[1]) tc_device_set_device_name(device, words[1]);
 646                         }
 647                         else if(device && first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0) {
 648                                 // debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
 649                                 if(words[1] && *words[1]) tc_device_set_device_family(device, words[1]);
 650                         }
 651                         else if(device && first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0) {
 652                                 // debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
 653                                 char *id    = words[1];
 654                                 char *path  = words[2];
 655                                 if(id && *id && path && *path) tc_device_set_class_name(device, id, path);
 656                         }
 657                         else if(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0) {
 658                                 // debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
 659                                 getrusage(RUSAGE_THREAD, &thread);
 660
 661                                 if(!stcpu) stcpu = rrdset_find("netdata.plugin_tc_cpu");
 662                                 if(!stcpu) {
 663                                         stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "tc.helper", NULL, "NetData TC CPU usage", "milliseconds/s", 135000, rrd_update_every, RRDSET_TYPE_STACKED);
 664                                         rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
 665                                         rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
 666                                 }
 667                                 else rrdset_next(stcpu);
 668
 669                                 rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
 670                                 rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
 671                                 rrdset_done(stcpu);
 672
 673                                 if(!sttime) stcpu = rrdset_find("netdata.plugin_tc_time");
 674                                 if(!sttime) {
 675                                         sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "tc.helper", NULL, "NetData TC script execution", "milliseconds/run", 135001, rrd_update_every, RRDSET_TYPE_AREA);
 676                                         rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
 677                                 }
 678                                 else rrdset_next(sttime);
 679
 680                                 rrddim_set(sttime, "run_time", atoll(words[1]));
 681                                 rrdset_done(sttime);
 682
 683                         }
 684 #ifdef DETACH_PLUGINS_FROM_NETDATA
 685                         else if(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0)) {
 686                                 // debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
 687                                 char *id = words[1];
 688                                 pid_t pid = atol(id);
 689
 690                                 if(pid) tc_child_pid = pid;
 691
 692                                 debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
 693                         }
 694 #endif
 695                         //else {
 696                         //      debug(D_TC_LOOP, "IGNORED line");
 697                         //}
 698                 }
 699                 // fgets() failed or loop broke
 700                 int code = mypclose(fp, tc_child_pid);
 701                 tc_child_pid = 0;
 702
 703                 if(device) {
 704                         // tc_device_free(device);
 705                         device = NULL;
 706                         class = NULL;
 707                 }
 708
 709                 if(netdata_exit) {
 710                         tc_device_free_all();
 711                         pthread_exit(NULL);
 712                         return NULL;
 713                 }
 714
 715                 if(code == 1 || code == 127) {
 716                         // 1 = DISABLE
 717                         // 127 = cannot even run it
 718                         error("TC: tc-qos-helper.sh exited with code %d. Disabling it.", code);
 719
 720                         tc_device_free_all();
 721                         pthread_exit(NULL);
 722                         return NULL;
 723                 }
 724
 725                 sleep((unsigned int) rrd_update_every);
 726         }
 727
 728         pthread_exit(NULL);
 729         return NULL;
 730 }