src/plugin_tc.c

   1 #include "common.h"
   2
   3 #define RRD_TYPE_TC                 "tc"
   4 #define RRD_TYPE_TC_LEN             strlen(RRD_TYPE_TC)
   5
   6 // ----------------------------------------------------------------------------
   7 // /sbin/tc processor
   8 // this requires the script plugins.d/tc-qos-helper.sh
   9
  10 #define TC_LINE_MAX 1024
  11
  12 struct tc_class {
  13     avl avl;
  14
  15     char *id;
  16     uint32_t hash;
  17
  18     char *name;
  19
  20     char *leafid;
  21     uint32_t leaf_hash;
  22
  23     char *parentid;
  24     uint32_t parent_hash;
  25
  26     char hasparent;
  27     char isleaf;
  28     unsigned long long bytes;
  29     unsigned long long packets;
  30     unsigned long long dropped;
  31     unsigned long long overlimits;
  32     unsigned long long requeues;
  33     unsigned long long lended;
  34     unsigned long long borrowed;
  35     unsigned long long giants;
  36     unsigned long long tokens;
  37     unsigned long long ctokens;
  38
  39     RRDDIM *rd_bytes;
  40     RRDDIM *rd_packets;
  41     RRDDIM *rd_dropped;
  42
  43     char name_updated;
  44     char updated;   // updated bytes
  45     int seen;       // seen in the tc list (even without bytes)
  46
  47     struct tc_class *next;
  48     struct tc_class *prev;
  49 };
  50
  51 struct tc_device {
  52     avl avl;
  53
  54     char *id;
  55     uint32_t hash;
  56
  57     char *name;
  58     char *family;
  59
  60     char name_updated;
  61     char family_updated;
  62
  63     char enabled;
  64     char enabled_bytes;
  65     char enabled_packets;
  66     char enabled_dropped;
  67
  68     RRDSET *st_bytes;
  69     RRDSET *st_packets;
  70     RRDSET *st_dropped;
  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     freez(c->id);
 144     freez(c->name);
 145     freez(c->leafid);
 146     freez(c->parentid);
 147     freez(c);
 148 }
 149
 150 static inline void tc_device_classes_cleanup(struct tc_device *d) {
 151     static int cleanup_every = 999;
 152
 153     if(unlikely(cleanup_every > 0)) {
 154         cleanup_every = (int) config_get_number("plugin:tc", "cleanup unused classes every", 60);
 155         if(cleanup_every < 0) cleanup_every = -cleanup_every;
 156     }
 157
 158     d->name_updated = 0;
 159     d->family_updated = 0;
 160
 161     struct tc_class *c = d->classes;
 162     while(c) {
 163         if(unlikely(cleanup_every > 0 && c->seen >= cleanup_every)) {
 164             struct tc_class *nc = c->next;
 165             tc_class_free(d, c);
 166             c = nc;
 167         }
 168         else {
 169             c->updated = 0;
 170             c->name_updated = 0;
 171
 172             c = c->next;
 173         }
 174     }
 175 }
 176
 177 static inline void tc_device_commit(struct tc_device *d) {
 178     static int enable_new_interfaces = -1, enable_bytes = -1, enable_packets = -1, enable_dropped = -1;
 179
 180     if(unlikely(enable_new_interfaces == -1)) {
 181         enable_new_interfaces = config_get_boolean_ondemand("plugin:tc", "enable new interfaces detected at runtime", CONFIG_ONDEMAND_YES);
 182         enable_bytes          = config_get_boolean_ondemand("plugin:tc", "enable traffic charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
 183         enable_packets        = config_get_boolean_ondemand("plugin:tc", "enable packets charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
 184         enable_dropped        = config_get_boolean_ondemand("plugin:tc", "enable dropped charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
 185     }
 186
 187     // we only need to add leaf classes
 188     struct tc_class *c, *x;
 189     unsigned long long bytes_sum = 0, packets_sum = 0, dropped_sum = 0;
 190     int active_classes = 0;
 191
 192     // set all classes
 193     for(c = d->classes ; c ; c = c->next) {
 194         c->isleaf = 1;
 195         c->hasparent = 0;
 196     }
 197
 198     // mark the classes as leafs and parents
 199     for(c = d->classes ; c ; c = c->next) {
 200         if(unlikely(!c->updated)) continue;
 201
 202         for(x = d->classes ; x ; x = x->next) {
 203             if(unlikely(!x->updated)) continue;
 204
 205             if(unlikely(c == x)) continue;
 206
 207             if(x->parentid && (
 208                 (               c->hash      == x->parent_hash && strcmp(c->id,     x->parentid) == 0) ||
 209                 (c->leafid   && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0))) {
 210                 // 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);
 211                 c->isleaf = 0;
 212                 x->hasparent = 1;
 213             }
 214         }
 215     }
 216
 217     // debugging:
 218     /*
 219     for ( c = d->classes ; c ; c = c->next) {
 220         if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device %s, class %s, OK", d->name, c->id);
 221         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);
 222     }
 223     */
 224
 225     // we need at least a class
 226     for(c = d->classes ; c ; c = c->next) {
 227         // 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);
 228         if(!c->updated) continue;
 229         if(c->isleaf && c->hasparent) {
 230             active_classes++;
 231             bytes_sum += c->bytes;
 232             packets_sum += c->packets;
 233             dropped_sum += c->dropped;
 234         }
 235     }
 236
 237     if(unlikely(!active_classes)) {
 238         debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No leaf classes.", d->name?d->name:d->id);
 239         tc_device_classes_cleanup(d);
 240         return;
 241     }
 242
 243     if(unlikely(d->enabled == -1)) {
 244         char var_name[CONFIG_MAX_NAME + 1];
 245         snprintfz(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
 246         d->enabled         = config_get_boolean_ondemand("plugin:tc", var_name, enable_new_interfaces);
 247
 248         snprintfz(var_name, CONFIG_MAX_NAME, "traffic chart for %s", d->id);
 249         d->enabled_bytes   = config_get_boolean_ondemand("plugin:tc", var_name, enable_bytes);
 250
 251         snprintfz(var_name, CONFIG_MAX_NAME, "packets chart for %s", d->id);
 252         d->enabled_packets = config_get_boolean_ondemand("plugin:tc", var_name, enable_packets);
 253
 254         snprintfz(var_name, CONFIG_MAX_NAME, "dropped packets chart for %s", d->id);
 255         d->enabled_dropped = config_get_boolean_ondemand("plugin:tc", var_name, enable_dropped);
 256     }
 257
 258     if(likely(d->enabled)) {
 259         // --------------------------------------------------------------------
 260         // bytes
 261
 262         if(d->enabled_bytes == CONFIG_ONDEMAND_YES || (d->enabled_bytes == CONFIG_ONDEMAND_ONDEMAND && bytes_sum)) {
 263             d->enabled_bytes = CONFIG_ONDEMAND_YES;
 264
 265             if(unlikely(!d->st_bytes)) {
 266                 d->st_bytes = rrdset_find_bytype(RRD_TYPE_TC, d->id);
 267                 if(unlikely(!d->st_bytes)) {
 268                     debug(D_TC_LOOP, "TC: Creating new chart for device '%s'", d->name?d->name:d->id);
 269                     d->st_bytes = 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);
 270                 }
 271             }
 272             else {
 273                 debug(D_TC_LOOP, "TC: Updating chart for device '%s'", d->name?d->name:d->id);
 274                 rrdset_next_plugins(d->st_bytes);
 275
 276                 if(unlikely(d->name_updated && d->name && strcmp(d->id, d->name) != 0)) {
 277                     rrdset_set_name(d->st_bytes, d->name);
 278                     d->name_updated = 0;
 279                 }
 280
 281                 // FIXME
 282                 // update the family
 283             }
 284
 285             for(c = d->classes ; c ; c = c->next) {
 286                 if(unlikely(!c->updated)) continue;
 287
 288                 if(c->isleaf && c->hasparent) {
 289                     c->seen++;
 290
 291                     if(unlikely(!c->rd_bytes)) {
 292                         c->rd_bytes = rrddim_find(d->st_bytes, c->id);
 293                         if(unlikely(!c->rd_bytes)) {
 294                             debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s' (name: '%s')", d->st_bytes->id, c->id, c->name);
 295
 296                             // new class, we have to add it
 297                             c->rd_bytes = rrddim_add(d->st_bytes, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 298                         }
 299                         else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", d->st_bytes->id, c->id);
 300                     }
 301
 302                     rrddim_set_by_pointer(d->st_bytes, c->rd_bytes, c->bytes);
 303
 304                     // if it has a name, different to the id
 305                     if(unlikely(c->name_updated && c->name && strcmp(c->id, c->name) != 0)) {
 306                         // update the rrd dimension with the new name
 307                         debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", d->st_bytes->id, c->rd_bytes->id, c->name);
 308                         rrddim_set_name(d->st_bytes, c->rd_bytes, c->name);
 309                     }
 310                 }
 311             }
 312             rrdset_done(d->st_bytes);
 313         }
 314
 315         // --------------------------------------------------------------------
 316         // packets
 317
 318         if(d->enabled_packets == CONFIG_ONDEMAND_YES || (d->enabled_packets == CONFIG_ONDEMAND_ONDEMAND && packets_sum)) {
 319             d->enabled_packets = CONFIG_ONDEMAND_YES;
 320
 321             if(unlikely(!d->st_packets)) {
 322                 char id[RRD_ID_LENGTH_MAX + 1];
 323                 char name[RRD_ID_LENGTH_MAX + 1];
 324                 snprintfz(id, RRD_ID_LENGTH_MAX, "%s_packets", d->id);
 325                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
 326
 327                 d->st_packets = rrdset_find_bytype(RRD_TYPE_TC, id);
 328                 if(unlikely(!d->st_packets)) {
 329                     debug(D_TC_LOOP, "TC: Creating new _packets chart for device '%s'", d->name?d->name:d->id);
 330                     d->st_packets = rrdset_create(RRD_TYPE_TC, id, name, d->family?d->family:d->id, RRD_TYPE_TC ".qos_packets", "Class Packets", "packets/s", 7010, rrd_update_every, RRDSET_TYPE_STACKED);
 331                 }
 332             }
 333             else {
 334                 debug(D_TC_LOOP, "TC: Updating _packets chart for device '%s'", d->name?d->name:d->id);
 335                 rrdset_next_plugins(d->st_packets);
 336
 337                 // FIXME
 338                 // update the family
 339             }
 340
 341             for(c = d->classes ; c ; c = c->next) {
 342                 if(unlikely(!c->updated)) continue;
 343
 344                 if(c->isleaf && c->hasparent) {
 345                     if(unlikely(!c->rd_packets)) {
 346                         c->rd_packets = rrddim_find(d->st_packets, c->id);
 347                         if(unlikely(!c->rd_packets)) {
 348                             debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s' (name: '%s')", d->st_packets->id, c->id, c->name);
 349
 350                             // new class, we have to add it
 351                             c->rd_packets = rrddim_add(d->st_packets, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 352                         }
 353                         else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", d->st_packets->id, c->id);
 354                     }
 355
 356                     rrddim_set_by_pointer(d->st_packets, c->rd_packets, c->packets);
 357
 358                     // if it has a name, different to the id
 359                     if(unlikely(c->name_updated && c->name && strcmp(c->id, c->name) != 0)) {
 360                         // update the rrd dimension with the new name
 361                         debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", d->st_packets->id, c->rd_packets->id, c->name);
 362                         rrddim_set_name(d->st_packets, c->rd_packets, c->name);
 363                     }
 364                 }
 365             }
 366             rrdset_done(d->st_packets);
 367         }
 368
 369         // --------------------------------------------------------------------
 370         // dropped
 371
 372         if(d->enabled_dropped == CONFIG_ONDEMAND_YES || (d->enabled_dropped == CONFIG_ONDEMAND_ONDEMAND && dropped_sum)) {
 373             d->enabled_dropped = CONFIG_ONDEMAND_YES;
 374
 375             if(unlikely(!d->st_dropped)) {
 376                 char id[RRD_ID_LENGTH_MAX + 1];
 377                 char name[RRD_ID_LENGTH_MAX + 1];
 378                 snprintfz(id, RRD_ID_LENGTH_MAX, "%s_dropped", d->id);
 379                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
 380
 381                 d->st_dropped = rrdset_find_bytype(RRD_TYPE_TC, id);
 382                 if(unlikely(!d->st_dropped)) {
 383                     debug(D_TC_LOOP, "TC: Creating new _dropped chart for device '%s'", d->name?d->name:d->id);
 384                     d->st_dropped = rrdset_create(RRD_TYPE_TC, id, name, d->family?d->family:d->id, RRD_TYPE_TC ".qos_dropped", "Class Dropped Packets", "packets/s", 7020, rrd_update_every, RRDSET_TYPE_STACKED);
 385                 }
 386             }
 387             else {
 388                 debug(D_TC_LOOP, "TC: Updating _dropped chart for device '%s'", d->name?d->name:d->id);
 389                 rrdset_next_plugins(d->st_dropped);
 390
 391                 // FIXME
 392                 // update the family
 393             }
 394
 395             for(c = d->classes ; c ; c = c->next) {
 396                 if(unlikely(!c->updated)) continue;
 397
 398                 if(c->isleaf && c->hasparent) {
 399                     if(unlikely(!c->rd_dropped)) {
 400                         c->rd_dropped = rrddim_find(d->st_dropped, c->id);
 401                         if(unlikely(!c->rd_dropped)) {
 402                             debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s' (name: '%s')", d->st_dropped->id, c->id, c->name);
 403
 404                             // new class, we have to add it
 405                             c->rd_dropped = rrddim_add(d->st_dropped, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 406                         }
 407                         else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", d->st_dropped->id, c->id);
 408                     }
 409
 410                     rrddim_set_by_pointer(d->st_dropped, c->rd_dropped, c->dropped);
 411
 412                     // if it has a name, different to the id
 413                     if(unlikely(c->name_updated && c->name && strcmp(c->id, c->name) != 0)) {
 414                         // update the rrd dimension with the new name
 415                         debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", d->st_dropped->id, c->rd_dropped->id, c->name);
 416                         rrddim_set_name(d->st_dropped, c->rd_dropped, c->name);
 417                     }
 418                 }
 419             }
 420             rrdset_done(d->st_dropped);
 421         }
 422     }
 423
 424     tc_device_classes_cleanup(d);
 425 }
 426
 427 static inline void tc_device_set_class_name(struct tc_device *d, char *id, char *name)
 428 {
 429     struct tc_class *c = tc_class_index_find(d, id, 0);
 430     if(likely(c)) {
 431         freez(c->name);
 432         c->name = NULL;
 433
 434         if(likely(name && *name && strcmp(c->id, name) != 0)) {
 435             debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
 436             c->name = strdupz(name);
 437             c->name_updated = 1;
 438         }
 439     }
 440 }
 441
 442 static inline void tc_device_set_device_name(struct tc_device *d, char *name) {
 443     freez(d->name);
 444     d->name = NULL;
 445
 446     if(likely(name && *name && strcmp(d->id, name) != 0)) {
 447         debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
 448         d->name = strdupz(name);
 449         d->name_updated = 1;
 450     }
 451 }
 452
 453 static inline void tc_device_set_device_family(struct tc_device *d, char *family) {
 454     freez(d->family);
 455     d->family = NULL;
 456
 457     if(likely(family && *family && strcmp(d->id, family) != 0)) {
 458         debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
 459         d->family = strdupz(family);
 460         d->family_updated = 1;
 461     }
 462     // no need for null termination - it is already null
 463 }
 464
 465 static inline struct tc_device *tc_device_create(char *id)
 466 {
 467     struct tc_device *d = tc_device_index_find(id, 0);
 468
 469     if(!d) {
 470         debug(D_TC_LOOP, "TC: Creating device '%s'", id);
 471
 472         d = callocz(1, sizeof(struct tc_device));
 473
 474         d->id = strdupz(id);
 475         d->hash = simple_hash(d->id);
 476         d->enabled = -1;
 477
 478         avl_init(&d->classes_index, tc_class_compare);
 479         tc_device_index_add(d);
 480
 481         if(!tc_device_root) {
 482             tc_device_root = d;
 483         }
 484         else {
 485             d->next = tc_device_root;
 486             tc_device_root->prev = d;
 487             tc_device_root = d;
 488         }
 489     }
 490
 491     return(d);
 492 }
 493
 494 static inline struct tc_class *tc_class_add(struct tc_device *n, char *id, char *parentid, char *leafid)
 495 {
 496     struct tc_class *c = tc_class_index_find(n, id, 0);
 497
 498     if(!c) {
 499         debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
 500
 501         c = callocz(1, sizeof(struct tc_class));
 502
 503         if(n->classes) n->classes->prev = c;
 504         c->next = n->classes;
 505         n->classes = c;
 506
 507         c->id = strdupz(id);
 508         c->hash = simple_hash(c->id);
 509
 510         if(parentid && *parentid) {
 511             c->parentid = strdupz(parentid);
 512             c->parent_hash = simple_hash(c->parentid);
 513         }
 514
 515         if(leafid && *leafid) {
 516             c->leafid = strdupz(leafid);
 517             c->leaf_hash = simple_hash(c->leafid);
 518         }
 519
 520         tc_class_index_add(n, c);
 521     }
 522
 523     c->seen = 1;
 524
 525     return(c);
 526 }
 527
 528 static inline void tc_device_free(struct tc_device *n)
 529 {
 530     if(n->next) n->next->prev = n->prev;
 531     if(n->prev) n->prev->next = n->next;
 532     if(tc_device_root == n) {
 533         if(n->next) tc_device_root = n->next;
 534         else tc_device_root = n->prev;
 535     }
 536
 537     tc_device_index_del(n);
 538
 539     while(n->classes) tc_class_free(n, n->classes);
 540
 541     freez(n->id);
 542     freez(n->name);
 543     freez(n->family);
 544     freez(n);
 545 }
 546
 547 static inline void tc_device_free_all()
 548 {
 549     while(tc_device_root)
 550         tc_device_free(tc_device_root);
 551 }
 552
 553 #define MAX_WORDS 20
 554
 555 static inline int tc_space(char c) {
 556     switch(c) {
 557     case ' ':
 558     case '\t':
 559     case '\r':
 560     case '\n':
 561         return 1;
 562
 563     default:
 564         return 0;
 565     }
 566 }
 567
 568 static inline void tc_split_words(char *str, char **words, int max_words) {
 569     char *s = str;
 570     int i = 0;
 571
 572     // skip all white space
 573     while(tc_space(*s)) s++;
 574
 575     // store the first word
 576     words[i++] = s;
 577
 578     // while we have something
 579     while(*s) {
 580         // if it is a space
 581         if(unlikely(tc_space(*s))) {
 582
 583             // terminate the word
 584             *s++ = '\0';
 585
 586             // skip all white space
 587             while(tc_space(*s)) s++;
 588
 589             // if we reached the end, stop
 590             if(!*s) break;
 591
 592             // store the next word
 593             if(i < max_words) words[i++] = s;
 594             else break;
 595         }
 596         else s++;
 597     }
 598
 599     // terminate the words
 600     while(i < max_words) words[i++] = NULL;
 601 }
 602
 603 pid_t tc_child_pid = 0;
 604 void *tc_main(void *ptr) {
 605     (void)ptr;
 606
 607     info("TC thread created with task id %d", gettid());
 608
 609     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 610         error("Cannot set pthread cancel type to DEFERRED.");
 611
 612     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 613         error("Cannot set pthread cancel state to ENABLE.");
 614
 615     struct rusage thread;
 616     RRDSET *stcpu = NULL, *sttime = NULL;
 617
 618     char buffer[TC_LINE_MAX+1] = "";
 619     char *words[MAX_WORDS] = { NULL };
 620
 621     uint32_t BEGIN_HASH = simple_hash("BEGIN");
 622     uint32_t END_HASH = simple_hash("END");
 623     uint32_t CLASS_HASH = simple_hash("class");
 624     uint32_t SENT_HASH = simple_hash("Sent");
 625     uint32_t LENDED_HASH = simple_hash("lended:");
 626     uint32_t TOKENS_HASH = simple_hash("tokens:");
 627     uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
 628     uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
 629     uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
 630     uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
 631 #ifdef DETACH_PLUGINS_FROM_NETDATA
 632     uint32_t MYPID_HASH = simple_hash("MYPID");
 633 #endif
 634     uint32_t first_hash;
 635
 636     snprintfz(buffer, TC_LINE_MAX, "%s/tc-qos-helper.sh", config_get("plugins", "plugins directory", PLUGINS_DIR));
 637     char *tc_script = config_get("plugin:tc", "script to run to get tc values", buffer);
 638
 639     for(;1;) {
 640         if(unlikely(netdata_exit)) break;
 641
 642         FILE *fp;
 643         struct tc_device *device = NULL;
 644         struct tc_class *class = NULL;
 645
 646         snprintfz(buffer, TC_LINE_MAX, "exec %s %d", tc_script, rrd_update_every);
 647         debug(D_TC_LOOP, "executing '%s'", buffer);
 648
 649         fp = mypopen(buffer, &tc_child_pid);
 650         if(unlikely(!fp)) {
 651             error("TC: Cannot popen(\"%s\", \"r\").", buffer);
 652             pthread_exit(NULL);
 653             return NULL;
 654         }
 655
 656         while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
 657             if(unlikely(netdata_exit)) break;
 658
 659             buffer[TC_LINE_MAX] = '\0';
 660             // debug(D_TC_LOOP, "TC: read '%s'", buffer);
 661
 662             tc_split_words(buffer, words, MAX_WORDS);
 663
 664             if(unlikely(!words[0] || !*words[0])) {
 665                 // debug(D_TC_LOOP, "empty line");
 666                 continue;
 667             }
 668             // else debug(D_TC_LOOP, "First word is '%s'", words[0]);
 669
 670             first_hash = simple_hash(words[0]);
 671
 672             if(unlikely(device && first_hash == CLASS_HASH && strcmp(words[0], "class") == 0)) {
 673                 // 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]);
 674
 675                 // words[1] : class type
 676                 // words[2] : N:XX
 677                 // words[3] : parent or root
 678                 if(likely(words[1] && words[2] && words[3] && (strcmp(words[3], "parent") == 0 || strcmp(words[3], "root") == 0))) {
 679                     //char *type     = words[1];  // the class: htb, fq_codel, etc
 680
 681                     // we are only interested for HTB classes
 682                     //if(strcmp(type, "htb") != 0) continue;
 683
 684                     char *id       = words[2];  // the class major:minor
 685                     char *parent   = words[3];  // 'parent' or 'root'
 686                     char *parentid = words[4];  // the parent's id
 687                     char *leaf     = words[5];  // 'leaf'
 688                     char *leafid   = words[6];  // leafid
 689
 690                     if(strcmp(parent, "root") == 0) {
 691                         parentid = NULL;
 692                         leafid = NULL;
 693                     }
 694                     else if(!leaf || strcmp(leaf, "leaf") != 0)
 695                         leafid = NULL;
 696
 697                     char leafbuf[20 + 1] = "";
 698                     if(leafid && leafid[strlen(leafid) - 1] == ':') {
 699                         strncpyz(leafbuf, leafid, 20 - 1);
 700                         strcat(leafbuf, "1");
 701                         leafid = leafbuf;
 702                     }
 703
 704                     class = tc_class_add(device, id, parentid, leafid);
 705                 }
 706                 else {
 707                     // clear the last class
 708                     class = NULL;
 709                 }
 710             }
 711             else if(unlikely(first_hash == END_HASH && strcmp(words[0], "END") == 0)) {
 712                 // debug(D_TC_LOOP, "END line");
 713
 714                 if(likely(device)) {
 715                     if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 716                         error("Cannot set pthread cancel state to DISABLE.");
 717
 718                     tc_device_commit(device);
 719                     // tc_device_free(device);
 720
 721                     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 722                         error("Cannot set pthread cancel state to ENABLE.");
 723                 }
 724
 725                 device = NULL;
 726                 class = NULL;
 727             }
 728             else if(unlikely(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0)) {
 729                 // debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
 730
 731                 if(likely(words[1] && *words[1])) {
 732                     device = tc_device_create(words[1]);
 733                 }
 734                 else {
 735                     // tc_device_free(device);
 736                     device = NULL;
 737                 }
 738
 739                 class = NULL;
 740             }
 741             else if(unlikely(device && class && first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0)) {
 742                 // debug(D_TC_LOOP, "SENT line '%s'", words[1]);
 743                 if(likely(words[1] && *words[1])) {
 744                     class->bytes = strtoull(words[1], NULL, 10);
 745                     class->updated = 1;
 746                 }
 747                 else {
 748                     class->updated = 0;
 749                 }
 750
 751                 if(likely(words[3] && *words[3]))
 752                     class->packets = strtoull(words[3], NULL, 10);
 753
 754                 if(likely(words[6] && *words[6]))
 755                     class->dropped = strtoull(words[6], NULL, 10);
 756
 757                 if(likely(words[8] && *words[8]))
 758                     class->overlimits = strtoull(words[8], NULL, 10);
 759
 760                 if(likely(words[10] && *words[10]))
 761                     class->requeues = strtoull(words[8], NULL, 10);
 762             }
 763             else if(unlikely(device && class && class->updated && first_hash == LENDED_HASH && strcmp(words[0], "lended:") == 0)) {
 764                 // debug(D_TC_LOOP, "LENDED line '%s'", words[1]);
 765                 if(likely(words[1] && *words[1]))
 766                     class->lended = strtoull(words[1], NULL, 10);
 767
 768                 if(likely(words[3] && *words[3]))
 769                     class->borrowed = strtoull(words[3], NULL, 10);
 770
 771                 if(likely(words[5] && *words[5]))
 772                     class->giants = strtoull(words[5], NULL, 10);
 773             }
 774             else if(unlikely(device && class && class->updated && first_hash == TOKENS_HASH && strcmp(words[0], "tokens:") == 0)) {
 775                 // debug(D_TC_LOOP, "TOKENS line '%s'", words[1]);
 776                 if(likely(words[1] && *words[1]))
 777                     class->tokens = strtoull(words[1], NULL, 10);
 778
 779                 if(likely(words[3] && *words[3]))
 780                     class->ctokens = strtoull(words[3], NULL, 10);
 781             }
 782             else if(unlikely(device && first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0)) {
 783                 // debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
 784                 if(likely(words[1] && *words[1]))
 785                     tc_device_set_device_name(device, words[1]);
 786             }
 787             else if(unlikely(device && first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0)) {
 788                 // debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
 789                 if(likely(words[1] && *words[1]))
 790                     tc_device_set_device_family(device, words[1]);
 791             }
 792             else if(unlikely(device && first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0)) {
 793                 // debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
 794                 char *id    = words[1];
 795                 char *path  = words[2];
 796                 if(likely(id && *id && path && *path))
 797                     tc_device_set_class_name(device, id, path);
 798             }
 799             else if(unlikely(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0)) {
 800                 // debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
 801                 getrusage(RUSAGE_THREAD, &thread);
 802
 803                 if(unlikely(!stcpu)) stcpu = rrdset_find("netdata.plugin_tc_cpu");
 804                 if(unlikely(!stcpu)) {
 805                     stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "tc.helper", NULL, "NetData TC CPU usage", "milliseconds/s", 135000, rrd_update_every, RRDSET_TYPE_STACKED);
 806                     rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
 807                     rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
 808                 }
 809                 else rrdset_next(stcpu);
 810
 811                 rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
 812                 rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
 813                 rrdset_done(stcpu);
 814
 815                 if(unlikely(!sttime)) stcpu = rrdset_find("netdata.plugin_tc_time");
 816                 if(unlikely(!sttime)) {
 817                     sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "tc.helper", NULL, "NetData TC script execution", "milliseconds/run", 135001, rrd_update_every, RRDSET_TYPE_AREA);
 818                     rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
 819                 }
 820                 else rrdset_next(sttime);
 821
 822                 rrddim_set(sttime, "run_time", atoll(words[1]));
 823                 rrdset_done(sttime);
 824
 825             }
 826 #ifdef DETACH_PLUGINS_FROM_NETDATA
 827             else if(unlikely(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0))) {
 828                 // debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
 829                 char *id = words[1];
 830                 pid_t pid = atol(id);
 831
 832                 if(likely(pid)) tc_child_pid = pid;
 833
 834                 debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
 835             }
 836 #endif
 837             //else {
 838             //  debug(D_TC_LOOP, "IGNORED line");
 839             //}
 840         }
 841
 842         // fgets() failed or loop broke
 843         int code = mypclose(fp, tc_child_pid);
 844         tc_child_pid = 0;
 845
 846         if(unlikely(device)) {
 847             // tc_device_free(device);
 848             device = NULL;
 849             class = NULL;
 850         }
 851
 852         if(unlikely(netdata_exit)) {
 853             tc_device_free_all();
 854             pthread_exit(NULL);
 855             return NULL;
 856         }
 857
 858         if(code == 1 || code == 127) {
 859             // 1 = DISABLE
 860             // 127 = cannot even run it
 861             error("TC: tc-qos-helper.sh exited with code %d. Disabling it.", code);
 862
 863             tc_device_free_all();
 864             pthread_exit(NULL);
 865             return NULL;
 866         }
 867
 868         sleep((unsigned int) rrd_update_every);
 869     }
 870
 871     pthread_exit(NULL);
 872     return NULL;
 873 }