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
  19 #define RRD_TYPE_TC                                     "tc"
  20 #define RRD_TYPE_TC_LEN                         strlen(RRD_TYPE_TC)
  21
  22 // ----------------------------------------------------------------------------
  23 // /sbin/tc processor
  24 // this requires the script plugins.d/tc-qos-helper.sh
  25
  26 #define TC_LINE_MAX 1024
  27
  28 struct tc_class {
  29         avl avl;
  30
  31         char *id;
  32         uint32_t hash;
  33
  34         char *name;
  35
  36         char *leafid;
  37         uint32_t leaf_hash;
  38
  39         char *parentid;
  40         uint32_t parent_hash;
  41
  42         char hasparent;
  43         char isleaf;
  44         unsigned long long bytes;
  45         unsigned long long packets;
  46         unsigned long long dropped;
  47         unsigned long long overlimits;
  48         unsigned long long requeues;
  49         unsigned long long lended;
  50         unsigned long long borrowed;
  51         unsigned long long giants;
  52         unsigned long long tokens;
  53         unsigned long long ctokens;
  54
  55         char updated;   // updated bytes
  56         char seen;              // seen in the tc list (even without bytes)
  57
  58         struct tc_class *next;
  59         struct tc_class *prev;
  60 };
  61
  62 struct tc_device {
  63         avl avl;
  64
  65         char *id;
  66         uint32_t hash;
  67
  68         char *name;
  69         char *family;
  70
  71         avl_tree classes_index;
  72
  73         struct tc_class *classes;
  74
  75         struct tc_device *next;
  76         struct tc_device *prev;
  77 };
  78
  79
  80 struct tc_device *tc_device_root = NULL;
  81
  82 // ----------------------------------------------------------------------------
  83 // tc_device index
  84
  85 static int tc_device_iterator(avl *a) { if(a) {}; return 0; }
  86
  87 static int tc_device_compare(void* a, void* b) {
  88         if(((struct tc_device *)a)->hash < ((struct tc_device *)b)->hash) return -1;
  89         else if(((struct tc_device *)a)->hash > ((struct tc_device *)b)->hash) return 1;
  90         else return strcmp(((struct tc_device *)a)->id, ((struct tc_device *)b)->id);
  91 }
  92
  93 avl_tree tc_device_root_index = {
  94                 NULL,
  95                 tc_device_compare,
  96 #ifdef AVL_LOCK_WITH_MUTEX
  97                 PTHREAD_MUTEX_INITIALIZER
  98 #else
  99                 PTHREAD_RWLOCK_INITIALIZER
 100 #endif
 101 };
 102
 103 #define tc_device_index_add(st) avl_insert(&tc_device_root_index, (avl *)(st))
 104 #define tc_device_index_del(st) avl_remove(&tc_device_root_index, (avl *)(st))
 105
 106 static struct tc_device *tc_device_index_find(const char *id, uint32_t hash) {
 107         struct tc_device *result = NULL, tmp;
 108         tmp.id = (char *)id;
 109         tmp.hash = (hash)?hash:simple_hash(tmp.id);
 110
 111         avl_search(&(tc_device_root_index), (avl *)&tmp, tc_device_iterator, (avl **)&result);
 112         return result;
 113 }
 114
 115
 116 // ----------------------------------------------------------------------------
 117 // tc_class index
 118
 119 static int tc_class_iterator(avl *a) { if(a) {}; return 0; }
 120
 121 static int tc_class_compare(void* a, void* b) {
 122         if(((struct tc_class *)a)->hash < ((struct tc_class *)b)->hash) return -1;
 123         else if(((struct tc_class *)a)->hash > ((struct tc_class *)b)->hash) return 1;
 124         else return strcmp(((struct tc_class *)a)->id, ((struct tc_class *)b)->id);
 125 }
 126
 127 #define tc_class_index_add(st, rd) avl_insert(&((st)->classes_index), (avl *)(rd))
 128 #define tc_class_index_del(st, rd) avl_remove(&((st)->classes_index), (avl *)(rd))
 129
 130 static struct tc_class *tc_class_index_find(struct tc_device *st, const char *id, uint32_t hash) {
 131         struct tc_class *result = NULL, tmp;
 132         tmp.id = (char *)id;
 133         tmp.hash = (hash)?hash:simple_hash(tmp.id);
 134
 135         avl_search(&(st->classes_index), (avl *)&tmp, tc_class_iterator, (avl **)&result);
 136         return result;
 137 }
 138
 139 // ----------------------------------------------------------------------------
 140
 141 static void tc_class_free(struct tc_device *n, struct tc_class *c) {
 142         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);
 143
 144         if(c->next) c->next->prev = c->prev;
 145         if(c->prev) c->prev->next = c->next;
 146         if(n->classes == c) {
 147                 if(c->next) n->classes = c->next;
 148                 else n->classes = c->prev;
 149         }
 150
 151         tc_class_index_del(n, c);
 152
 153         if(c->id) free(c->id);
 154         if(c->name) free(c->name);
 155         if(c->leafid) free(c->leafid);
 156         if(c->parentid) free(c->parentid);
 157
 158         free(c);
 159 }
 160
 161 static void tc_device_classes_cleanup(struct tc_device *d) {
 162         static int cleanup_every = 999;
 163
 164         if(cleanup_every > 0) {
 165                 cleanup_every = (int) -config_get_number("plugin:tc", "cleanup unused classes every", 60);
 166                 if(cleanup_every > 0) cleanup_every = -cleanup_every;
 167                 if(cleanup_every == 0) cleanup_every = -1;
 168         }
 169
 170         struct tc_class *c = d->classes;
 171         while(c) {
 172                 if(c->seen < cleanup_every) {
 173                         struct tc_class *nc = c->next;
 174                         tc_class_free(d, c);
 175                         c = nc;
 176                 }
 177                 else c = c->next;
 178
 179                 if(c) {
 180                         c->updated = 0;
 181                         c->seen--;
 182                 }
 183         }
 184 }
 185
 186 static void tc_device_commit(struct tc_device *d)
 187 {
 188         static int enable_new_interfaces = -1;
 189
 190         if(enable_new_interfaces == -1) enable_new_interfaces = config_get_boolean("plugin:tc", "enable new interfaces detected at runtime", 1);
 191
 192         // we only need to add leaf classes
 193         struct tc_class *c, *x;
 194
 195         // set all classes
 196         for(c = d->classes ; c ; c = c->next) {
 197                 c->isleaf = 1;
 198                 c->hasparent = 0;
 199         }
 200
 201         // mark the classes as leafs and parents
 202         for(c = d->classes ; c ; c = c->next) {
 203                 if(!c->updated) continue;
 204
 205                 for(x = d->classes ; x ; x = x->next) {
 206                         if(!x->updated) continue;
 207
 208                         if(c == x) continue;
 209
 210                         if(x->parentid && (
 211                                 (               c->hash      == x->parent_hash && strcmp(c->id,     x->parentid) == 0) ||
 212                                 (c->leafid   && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0))) {
 213                                 // 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);
 214                                 c->isleaf = 0;
 215                                 x->hasparent = 1;
 216                         }
 217                 }
 218         }
 219
 220         // debugging:
 221         /*
 222         for ( c = d->classes ; c ; c = c->next) {
 223                 if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device %s, class %s, OK", d->name, c->id);
 224                 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);
 225         }
 226         */
 227
 228         // we need at least a class
 229         for(c = d->classes ; c ; c = c->next) {
 230                 // 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);
 231                 if(!c->updated) continue;
 232                 if(c->isleaf && c->hasparent) break;
 233         }
 234         if(!c) {
 235                 debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No leaf classes.", d->name?d->name:d->id);
 236                 tc_device_classes_cleanup(d);
 237                 return;
 238         }
 239
 240         char var_name[CONFIG_MAX_NAME + 1];
 241         snprintf(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
 242         if(config_get_boolean("plugin:tc", var_name, enable_new_interfaces)) {
 243                 RRDSET *st = rrdset_find_bytype(RRD_TYPE_TC, d->id);
 244                 if(!st) {
 245                         debug(D_TC_LOOP, "TC: Creating new chart for device '%s'", d->name?d->name:d->id);
 246
 247                         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);
 248
 249                         for(c = d->classes ; c ; c = c->next) {
 250                                 if(!c->updated) continue;
 251
 252                                 if(c->isleaf && c->hasparent)
 253                                         rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 254                         }
 255                 }
 256                 else {
 257                         debug(D_TC_LOOP, "TC: Updating chart for device '%s'", d->name?d->name:d->id);
 258                         rrdset_next_plugins(st);
 259
 260                         if(d->name && strcmp(d->id, d->name) != 0) rrdset_set_name(st, d->name);
 261                 }
 262
 263                 for(c = d->classes ; c ; c = c->next) {
 264                         if(!c->updated) continue;
 265
 266                         if(c->isleaf && c->hasparent) {
 267                                 RRDDIM *rd = rrddim_find(st, c->id);
 268
 269                                 if(!rd) {
 270                                         debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s'", st->id, c->id, c->name);
 271
 272                                         // new class, we have to add it
 273                                         rd = rrddim_add(st, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 274                                 }
 275                                 else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", st->id, c->id);
 276
 277                                 rrddim_set_by_pointer(st, rd, c->bytes);
 278
 279                                 // if it has a name, different to the id
 280                                 if(c->name) {
 281                                         // update the rrd dimension with the new name
 282                                         debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", st->id, rd->id, c->name);
 283                                         rrddim_set_name(st, rd, c->name);
 284
 285                                         free(c->name);
 286                                         c->name = NULL;
 287                                 }
 288                         }
 289                 }
 290                 rrdset_done(st);
 291         }
 292
 293         tc_device_classes_cleanup(d);
 294 }
 295
 296 static void tc_device_set_class_name(struct tc_device *d, char *id, char *name)
 297 {
 298         struct tc_class *c = tc_class_index_find(d, id, 0);
 299         if(c) {
 300                 if(c->name) free(c->name);
 301                 c->name = NULL;
 302
 303                 if(name && *name && strcmp(c->id, name) != 0) {
 304                         debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
 305                         c->name = strdup(name);
 306                 }
 307         }
 308 }
 309
 310 static void tc_device_set_device_name(struct tc_device *d, char *name) {
 311         if(d->name) free(d->name);
 312         d->name = NULL;
 313
 314         if(name && *name && strcmp(d->id, name) != 0) {
 315                 debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
 316                 d->name = strdup(name);
 317         }
 318 }
 319
 320 static void tc_device_set_device_family(struct tc_device *d, char *family) {
 321         if(d->family) free(d->family);
 322         d->family = NULL;
 323
 324         if(family && *family && strcmp(d->id, family) != 0) {
 325                 debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
 326                 d->family = strdup(family);
 327         }
 328         // no need for null termination - it is already null
 329 }
 330
 331 static struct tc_device *tc_device_create(char *id)
 332 {
 333         struct tc_device *d = tc_device_index_find(id, 0);
 334
 335         if(!d) {
 336                 debug(D_TC_LOOP, "TC: Creating device '%s'", id);
 337
 338                 d = calloc(1, sizeof(struct tc_device));
 339                 if(!d) {
 340                         fatal("Cannot allocate memory for tc_device %s", id);
 341                         return NULL;
 342                 }
 343
 344                 d->id = strdup(id);
 345                 d->hash = simple_hash(d->id);
 346
 347                 d->classes_index.root = NULL;
 348                 d->classes_index.compar = tc_class_compare;
 349
 350                 int lock;
 351 #ifdef AVL_LOCK_WITH_MUTEX
 352                 lock = pthread_mutex_init(&d->classes_index.mutex, NULL);
 353 #else
 354                 lock = pthread_rwlock_init(&d->classes_index.rwlock, NULL);
 355 #endif
 356                 if(lock != 0)
 357                         fatal("Failed to initialize plugin_tc mutex/rwlock, return code %d.", lock);
 358
 359                 tc_device_index_add(d);
 360
 361                 if(!tc_device_root) {
 362                         tc_device_root = d;
 363                 }
 364                 else {
 365                         d->next = tc_device_root;
 366                         tc_device_root->prev = d;
 367                         tc_device_root = d;
 368                 }
 369         }
 370
 371         return(d);
 372 }
 373
 374 static struct tc_class *tc_class_add(struct tc_device *n, char *id, char *parentid, char *leafid)
 375 {
 376         struct tc_class *c = tc_class_index_find(n, id, 0);
 377
 378         if(!c) {
 379                 debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
 380
 381                 c = calloc(1, sizeof(struct tc_class));
 382                 if(!c) {
 383                         fatal("Cannot allocate memory for tc class");
 384                         return NULL;
 385                 }
 386
 387                 if(n->classes) n->classes->prev = c;
 388                 c->next = n->classes;
 389                 n->classes = c;
 390
 391                 c->id = strdup(id);
 392                 if(!c->id) {
 393                         free(c);
 394                         return NULL;
 395                 }
 396                 c->hash = simple_hash(c->id);
 397
 398                 if(parentid && *parentid) {
 399                         c->parentid = strdup(parentid);
 400                         c->parent_hash = simple_hash(c->parentid);
 401                 }
 402
 403                 if(leafid && *leafid) {
 404                         c->leafid = strdup(leafid);
 405                         c->leaf_hash = simple_hash(c->leafid);
 406                 }
 407
 408                 tc_class_index_add(n, c);
 409         }
 410
 411         c->seen = 1;
 412
 413         return(c);
 414 }
 415
 416 static void tc_device_free(struct tc_device *n)
 417 {
 418         if(n->next) n->next->prev = n->prev;
 419         if(n->prev) n->prev->next = n->next;
 420         if(tc_device_root == n) {
 421                 if(n->next) tc_device_root = n->next;
 422                 else tc_device_root = n->prev;
 423         }
 424
 425         tc_device_index_del(n);
 426
 427         while(n->classes) tc_class_free(n, n->classes);
 428
 429         if(n->id) free(n->id);
 430         if(n->name) free(n->name);
 431         if(n->family) free(n->family);
 432
 433         free(n);
 434 }
 435
 436 static void tc_device_free_all()
 437 {
 438         while(tc_device_root)
 439                 tc_device_free(tc_device_root);
 440 }
 441
 442 #define MAX_WORDS 20
 443
 444 static inline int tc_space(char c) {
 445         switch(c) {
 446         case ' ':
 447         case '\t':
 448         case '\r':
 449         case '\n':
 450                 return 1;
 451
 452         default:
 453                 return 0;
 454         }
 455 }
 456
 457 static void tc_split_words(char *str, char **words, int max_words) {
 458         char *s = str;
 459         int i = 0;
 460
 461         // skip all white space
 462         while(tc_space(*s)) s++;
 463
 464         // store the first word
 465         words[i++] = s;
 466
 467         // while we have something
 468         while(*s) {
 469                 // if it is a space
 470                 if(tc_space(*s)) {
 471
 472                         // terminate the word
 473                         *s++ = '\0';
 474
 475                         // skip all white space
 476                         while(tc_space(*s)) s++;
 477
 478                         // if we reached the end, stop
 479                         if(!*s) break;
 480
 481                         // store the next word
 482                         if(i < max_words) words[i++] = s;
 483                         else break;
 484                 }
 485                 else s++;
 486         }
 487
 488         // terminate the words
 489         while(i < max_words) words[i++] = NULL;
 490 }
 491
 492 pid_t tc_child_pid = 0;
 493 void *tc_main(void *ptr)
 494 {
 495         if(ptr) { ; }
 496
 497         info("TC thread created with task id %d", gettid());
 498
 499         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 500                 error("Cannot set pthread cancel type to DEFERRED.");
 501
 502         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 503                 error("Cannot set pthread cancel state to ENABLE.");
 504
 505         struct rusage thread;
 506         RRDSET *stcpu = NULL, *sttime = NULL;
 507
 508         char buffer[TC_LINE_MAX+1] = "";
 509         char *words[MAX_WORDS] = { NULL };
 510
 511         uint32_t BEGIN_HASH = simple_hash("BEGIN");
 512         uint32_t END_HASH = simple_hash("END");
 513         uint32_t CLASS_HASH = simple_hash("class");
 514         uint32_t SENT_HASH = simple_hash("Sent");
 515         uint32_t LENDED_HASH = simple_hash("lended:");
 516         uint32_t TOKENS_HASH = simple_hash("tokens:");
 517         uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
 518         uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
 519         uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
 520         uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
 521 #ifdef DETACH_PLUGINS_FROM_NETDATA
 522         uint32_t MYPID_HASH = simple_hash("MYPID");
 523 #endif
 524         uint32_t first_hash;
 525
 526         for(;1;) {
 527                 if(unlikely(netdata_exit)) break;
 528
 529                 FILE *fp;
 530                 struct tc_device *device = NULL;
 531                 struct tc_class *class = NULL;
 532
 533                 snprintf(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);
 534                 debug(D_TC_LOOP, "executing '%s'", buffer);
 535                 // fp = popen(buffer, "r");
 536                 fp = mypopen(buffer, &tc_child_pid);
 537                 if(!fp) {
 538                         error("TC: Cannot popen(\"%s\", \"r\").", buffer);
 539                         pthread_exit(NULL);
 540                         return NULL;
 541                 }
 542
 543                 while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
 544                         if(unlikely(netdata_exit)) break;
 545
 546                         buffer[TC_LINE_MAX] = '\0';
 547                         // debug(D_TC_LOOP, "TC: read '%s'", buffer);
 548
 549                         tc_split_words(buffer, words, MAX_WORDS);
 550                         if(!words[0] || !*words[0]) {
 551                                 // debug(D_TC_LOOP, "empty line");
 552                                 continue;
 553                         }
 554                         // else debug(D_TC_LOOP, "First word is '%s'", words[0]);
 555
 556                         first_hash = simple_hash(words[0]);
 557
 558                         if(device && first_hash == CLASS_HASH && strcmp(words[0], "class") == 0) {
 559                                 // 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]);
 560
 561                                 // clear the last class
 562                                 class = NULL;
 563
 564                                 // words[1] : class type
 565                                 // words[2] : N:XX
 566                                 // words[3] : parent or root
 567                                 if(words[1] && words[2] && words[3] && (strcmp(words[3], "parent") == 0 || strcmp(words[3], "root") == 0)) {
 568                                         //char *type     = words[1];  // the class: htb, fq_codel, etc
 569
 570                                         // we are only interested for HTB classes
 571                                         //if(strcmp(type, "htb") != 0) continue;
 572
 573                                         char *id       = words[2];      // the class major:minor
 574                                         char *parent   = words[3];      // 'parent' or 'root'
 575                                         char *parentid = words[4];      // the parent's id
 576                                         char *leaf     = words[5];      // 'leaf'
 577                                         char *leafid   = words[6];      // leafid
 578
 579                                         if(strcmp(parent, "root") == 0) {
 580                                                 parentid = NULL;
 581                                                 leafid = NULL;
 582                                         }
 583                                         else if(!leaf || strcmp(leaf, "leaf") != 0)
 584                                                 leafid = NULL;
 585
 586                                         char leafbuf[20 + 1] = "";
 587                                         if(leafid && leafid[strlen(leafid) - 1] == ':') {
 588                                                 strncpy(leafbuf, leafid, 20 - 1);
 589                                                 strcat(leafbuf, "1");
 590                                                 leafid = leafbuf;
 591                                         }
 592
 593                                         class = tc_class_add(device, id, parentid, leafid);
 594                                 }
 595                         }
 596                         else if(first_hash == END_HASH && strcmp(words[0], "END") == 0) {
 597                                 // debug(D_TC_LOOP, "END line");
 598
 599                                 if(device) {
 600                                         if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 601                                                 error("Cannot set pthread cancel state to DISABLE.");
 602
 603                                         tc_device_commit(device);
 604                                         // tc_device_free(device);
 605                                         device = NULL;
 606                                         class = NULL;
 607
 608                                         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 609                                                 error("Cannot set pthread cancel state to ENABLE.");
 610                                 }
 611                         }
 612                         else if(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0) {
 613                                 // debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
 614
 615                                 if(device) {
 616                                         // tc_device_free(device);
 617                                         device = NULL;
 618                                         class = NULL;
 619                                 }
 620
 621                                 if(words[1] && *words[1]) {
 622                                         device = tc_device_create(words[1]);
 623                                         class = NULL;
 624                                 }
 625                         }
 626                         else if(device && class && first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0) {
 627                                 // debug(D_TC_LOOP, "SENT line '%s'", words[1]);
 628                                 if(words[1] && *words[1]) {
 629                                         class->bytes = strtoull(words[1], NULL, 10);
 630                                         class->updated = 1;
 631                                 }
 632
 633                                 if(words[3] && *words[3])
 634                                         class->packets = strtoull(words[3], NULL, 10);
 635
 636                                 if(words[6] && *words[6])
 637                                         class->dropped = strtoull(words[6], NULL, 10);
 638
 639                                 if(words[8] && *words[8])
 640                                         class->overlimits = strtoull(words[8], NULL, 10);
 641
 642                                 if(words[10] && *words[10])
 643                                         class->requeues = strtoull(words[8], NULL, 10);
 644                         }
 645                         else if(device && class && class->updated && first_hash == LENDED_HASH && strcmp(words[0], "lended:") == 0) {
 646                                 // debug(D_TC_LOOP, "LENDED line '%s'", words[1]);
 647                                 if(words[1] && *words[1])
 648                                         class->lended = strtoull(words[1], NULL, 10);
 649
 650                                 if(words[3] && *words[3])
 651                                         class->borrowed = strtoull(words[3], NULL, 10);
 652
 653                                 if(words[5] && *words[5])
 654                                         class->giants = strtoull(words[5], NULL, 10);
 655                         }
 656                         else if(device && class && class->updated && first_hash == TOKENS_HASH && strcmp(words[0], "tokens:") == 0) {
 657                                 // debug(D_TC_LOOP, "TOKENS line '%s'", words[1]);
 658                                 if(words[1] && *words[1])
 659                                         class->tokens = strtoull(words[1], NULL, 10);
 660
 661                                 if(words[3] && *words[3])
 662                                         class->ctokens = strtoull(words[3], NULL, 10);
 663                         }
 664                         else if(device && first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0) {
 665                                 // debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
 666                                 if(words[1] && *words[1]) tc_device_set_device_name(device, words[1]);
 667                         }
 668                         else if(device && first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0) {
 669                                 // debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
 670                                 if(words[1] && *words[1]) tc_device_set_device_family(device, words[1]);
 671                         }
 672                         else if(device && first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0) {
 673                                 // debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
 674                                 char *id    = words[1];
 675                                 char *path  = words[2];
 676                                 if(id && *id && path && *path) tc_device_set_class_name(device, id, path);
 677                         }
 678                         else if(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0) {
 679                                 // debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
 680                                 getrusage(RUSAGE_THREAD, &thread);
 681
 682                                 if(!stcpu) stcpu = rrdset_find("netdata.plugin_tc_cpu");
 683                                 if(!stcpu) {
 684                                         stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "tc.helper", NULL, "NetData TC CPU usage", "milliseconds/s", 135000, rrd_update_every, RRDSET_TYPE_STACKED);
 685                                         rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
 686                                         rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
 687                                 }
 688                                 else rrdset_next(stcpu);
 689
 690                                 rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
 691                                 rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
 692                                 rrdset_done(stcpu);
 693
 694                                 if(!sttime) stcpu = rrdset_find("netdata.plugin_tc_time");
 695                                 if(!sttime) {
 696                                         sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "tc.helper", NULL, "NetData TC script execution", "milliseconds/run", 135001, rrd_update_every, RRDSET_TYPE_AREA);
 697                                         rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
 698                                 }
 699                                 else rrdset_next(sttime);
 700
 701                                 rrddim_set(sttime, "run_time", atoll(words[1]));
 702                                 rrdset_done(sttime);
 703
 704                         }
 705 #ifdef DETACH_PLUGINS_FROM_NETDATA
 706                         else if(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0)) {
 707                                 // debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
 708                                 char *id = words[1];
 709                                 pid_t pid = atol(id);
 710
 711                                 if(pid) tc_child_pid = pid;
 712
 713                                 debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
 714                         }
 715 #endif
 716                         //else {
 717                         //      debug(D_TC_LOOP, "IGNORED line");
 718                         //}
 719                 }
 720                 mypclose(fp, tc_child_pid);
 721                 tc_child_pid = 0;
 722
 723                 if(device) {
 724                         // tc_device_free(device);
 725                         device = NULL;
 726                         class = NULL;
 727                 }
 728
 729                 if(netdata_exit) {
 730                         tc_device_free_all();
 731                         pthread_exit(NULL);
 732                         return NULL;
 733                 }
 734
 735                 sleep((unsigned int) rrd_update_every);
 736         }
 737
 738         pthread_exit(NULL);
 739         return NULL;
 740 }
 741