src/plugin_tc.c

   1 #include "common.h"
   2
   3 #define RRD_TYPE_TC "tc"
   4
   5 // ----------------------------------------------------------------------------
   6 // /sbin/tc processor
   7 // this requires the script plugins.d/tc-qos-helper.sh
   8
   9 #define TC_LINE_MAX 1024
  10
  11 struct tc_class {
  12     avl avl;
  13
  14     char *id;
  15     uint32_t hash;
  16
  17     char *name;
  18
  19     char *leafid;
  20     uint32_t leaf_hash;
  21
  22     char *parentid;
  23     uint32_t parent_hash;
  24
  25     char hasparent;
  26     char isleaf;
  27     char isqdisc;
  28     char render;
  29
  30     unsigned long long bytes;
  31     unsigned long long packets;
  32     unsigned long long dropped;
  33     unsigned long long overlimits;
  34     unsigned long long requeues;
  35     unsigned long long lended;
  36     unsigned long long borrowed;
  37     unsigned long long giants;
  38     unsigned long long tokens;
  39     unsigned long long ctokens;
  40
  41     RRDDIM *rd_bytes;
  42     RRDDIM *rd_packets;
  43     RRDDIM *rd_dropped;
  44     RRDDIM *rd_tokens;
  45     RRDDIM *rd_ctokens;
  46
  47     char name_updated;
  48     char updated;   // updated bytes
  49     int  unupdated; // the number of times, this has been found un-updated
  50
  51     struct tc_class *next;
  52     struct tc_class *prev;
  53 };
  54
  55 struct tc_device {
  56     avl avl;
  57
  58     char *id;
  59     uint32_t hash;
  60
  61     char *name;
  62     char *family;
  63
  64     char name_updated;
  65     char family_updated;
  66
  67     char enabled;
  68     char enabled_bytes;
  69     char enabled_packets;
  70     char enabled_dropped;
  71     char enabled_tokens;
  72     char enabled_ctokens;
  73     char enabled_all_classes_qdiscs;
  74
  75     RRDSET *st_bytes;
  76     RRDSET *st_packets;
  77     RRDSET *st_dropped;
  78     RRDSET *st_tokens;
  79     RRDSET *st_ctokens;
  80
  81     avl_tree classes_index;
  82
  83     struct tc_class *classes;
  84
  85     struct tc_device *next;
  86     struct tc_device *prev;
  87 };
  88
  89
  90 struct tc_device *tc_device_root = NULL;
  91
  92 // ----------------------------------------------------------------------------
  93 // tc_device index
  94
  95 static int tc_device_compare(void* a, void* b) {
  96     if(((struct tc_device *)a)->hash < ((struct tc_device *)b)->hash) return -1;
  97     else if(((struct tc_device *)a)->hash > ((struct tc_device *)b)->hash) return 1;
  98     else return strcmp(((struct tc_device *)a)->id, ((struct tc_device *)b)->id);
  99 }
 100
 101 avl_tree tc_device_root_index = {
 102         NULL,
 103         tc_device_compare
 104 };
 105
 106 #define tc_device_index_add(st) (struct tc_device *)avl_insert(&tc_device_root_index, (avl *)(st))
 107 #define tc_device_index_del(st) (struct tc_device *)avl_remove(&tc_device_root_index, (avl *)(st))
 108
 109 static inline struct tc_device *tc_device_index_find(const char *id, uint32_t hash) {
 110     struct tc_device tmp;
 111     tmp.id = (char *)id;
 112     tmp.hash = (hash)?hash:simple_hash(tmp.id);
 113
 114     return (struct tc_device *)avl_search(&(tc_device_root_index), (avl *)&tmp);
 115 }
 116
 117
 118 // ----------------------------------------------------------------------------
 119 // tc_class index
 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) (struct tc_class *)avl_insert(&((st)->classes_index), (avl *)(rd))
 128 #define tc_class_index_del(st, rd) (struct tc_class *)avl_remove(&((st)->classes_index), (avl *)(rd))
 129
 130 static inline struct tc_class *tc_class_index_find(struct tc_device *st, const char *id, uint32_t hash) {
 131     struct tc_class tmp;
 132     tmp.id = (char *)id;
 133     tmp.hash = (hash)?hash:simple_hash(tmp.id);
 134
 135     return (struct tc_class *)avl_search(&(st->classes_index), (avl *) &tmp);
 136 }
 137
 138 // ----------------------------------------------------------------------------
 139
 140 static inline void tc_class_free(struct tc_device *n, struct tc_class *c) {
 141     if(c == n->classes) {
 142         if(c->next)
 143             n->classes = c->next;
 144         else
 145             n->classes = c->prev;
 146     }
 147     if(c->next) c->next->prev = c->prev;
 148     if(c->prev) c->prev->next = c->next;
 149
 150     debug(D_TC_LOOP, "Removing from device '%s' class '%s', parentid '%s', leafid '%s', unused=%d", n->id, c->id, c->parentid?c->parentid:"", c->leafid?c->leafid:"", c->unupdated);
 151
 152     if(unlikely(tc_class_index_del(n, c) != c))
 153         error("plugin_tc: INTERNAL ERROR: attempt remove class '%s' from device '%s': removed a different calls", c->id, n->id);
 154
 155     freez(c->id);
 156     freez(c->name);
 157     freez(c->leafid);
 158     freez(c->parentid);
 159     freez(c);
 160 }
 161
 162 static inline void tc_device_classes_cleanup(struct tc_device *d) {
 163     static int cleanup_every = 999;
 164
 165     if(unlikely(cleanup_every > 0)) {
 166         cleanup_every = (int) config_get_number("plugin:tc", "cleanup unused classes every", 120);
 167         if(cleanup_every < 0) cleanup_every = -cleanup_every;
 168     }
 169
 170     d->name_updated = 0;
 171     d->family_updated = 0;
 172
 173     struct tc_class *c = d->classes;
 174     while(c) {
 175         if(unlikely(cleanup_every && c->unupdated >= cleanup_every)) {
 176             struct tc_class *nc = c->next;
 177             tc_class_free(d, c);
 178             c = nc;
 179         }
 180         else {
 181             c->updated = 0;
 182             c->name_updated = 0;
 183
 184             c = c->next;
 185         }
 186     }
 187 }
 188
 189 static inline void tc_device_commit(struct tc_device *d) {
 190     static int enable_new_interfaces = -1, enable_bytes = -1, enable_packets = -1, enable_dropped = -1, enable_tokens = -1, enable_ctokens = -1, enabled_all_classes_qdiscs = -1;
 191
 192     if(unlikely(enable_new_interfaces == -1)) {
 193         enable_new_interfaces      = config_get_boolean_ondemand("plugin:tc", "enable new interfaces detected at runtime", CONFIG_ONDEMAND_YES);
 194         enable_bytes               = config_get_boolean_ondemand("plugin:tc", "enable traffic charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
 195         enable_packets             = config_get_boolean_ondemand("plugin:tc", "enable packets charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
 196         enable_dropped             = config_get_boolean_ondemand("plugin:tc", "enable dropped charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
 197         enable_tokens              = config_get_boolean_ondemand("plugin:tc", "enable tokens charts for all interfaces", CONFIG_ONDEMAND_NO);
 198         enable_ctokens             = config_get_boolean_ondemand("plugin:tc", "enable ctokens charts for all interfaces", CONFIG_ONDEMAND_NO);
 199         enabled_all_classes_qdiscs = config_get_boolean_ondemand("plugin:tc", "enable show all classes and qdiscs for all interfaces", CONFIG_ONDEMAND_NO);
 200     }
 201
 202     if(unlikely(d->enabled == (char)-1)) {
 203         char var_name[CONFIG_MAX_NAME + 1];
 204         snprintfz(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
 205
 206         d->enabled                    = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_new_interfaces);
 207
 208         snprintfz(var_name, CONFIG_MAX_NAME, "traffic chart for %s", d->id);
 209         d->enabled_bytes              = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_bytes);
 210
 211         snprintfz(var_name, CONFIG_MAX_NAME, "packets chart for %s", d->id);
 212         d->enabled_packets            = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_packets);
 213
 214         snprintfz(var_name, CONFIG_MAX_NAME, "dropped packets chart for %s", d->id);
 215         d->enabled_dropped            = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_dropped);
 216
 217         snprintfz(var_name, CONFIG_MAX_NAME, "tokens chart for %s", d->id);
 218         d->enabled_tokens             = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_tokens);
 219
 220         snprintfz(var_name, CONFIG_MAX_NAME, "ctokens chart for %s", d->id);
 221         d->enabled_ctokens            = (char)config_get_boolean_ondemand("plugin:tc", var_name, enable_ctokens);
 222
 223         snprintfz(var_name, CONFIG_MAX_NAME, "show all classes for %s", d->id);
 224         d->enabled_all_classes_qdiscs = (char)config_get_boolean_ondemand("plugin:tc", var_name, enabled_all_classes_qdiscs);
 225     }
 226
 227     // we only need to add leaf classes
 228     struct tc_class *c, *x /*, *root = NULL */;
 229     unsigned long long bytes_sum = 0, packets_sum = 0, dropped_sum = 0, tokens_sum = 0, ctokens_sum = 0;
 230     int active_nodes = 0, updated_classes = 0, updated_qdiscs = 0;
 231
 232     // prepare all classes
 233     // we set reasonable defaults for the rest of the code below
 234
 235     for(c = d->classes ; c ; c = c->next) {
 236         c->render = 0;          // do not render this class
 237
 238         c->isleaf = 1;          // this is a leaf class
 239         c->hasparent = 0;       // without a parent
 240
 241         if(unlikely(!c->updated))
 242             c->unupdated++;     // increase its unupdated counter
 243         else {
 244             c->unupdated = 0;   // reset its unupdated counter
 245
 246             // count how many of each kind
 247             if(c->isqdisc)
 248                 updated_qdiscs++;
 249             else
 250                 updated_classes++;
 251         }
 252     }
 253
 254     if(unlikely(!d->enabled || (!updated_classes && !updated_qdiscs))) {
 255         debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. It is not enabled/updated.", d->name?d->name:d->id);
 256         tc_device_classes_cleanup(d);
 257         return;
 258     }
 259
 260     if(unlikely(updated_classes && updated_qdiscs)) {
 261         error("TC: device '%s' has active both classes (%d) and qdiscs (%d). Will render only qdiscs.", d->id, updated_classes, updated_qdiscs);
 262
 263         // set all classes to !updated
 264         for(c = d->classes ; c ; c = c->next)
 265             if(unlikely(!c->isqdisc && c->updated))
 266                 c->updated = 0;
 267
 268         updated_classes = 0;
 269     }
 270
 271     // mark the classes as leafs and parents
 272     //
 273     // TC is hierarchical:
 274     //  - classes can have other classes in them
 275     //  - the same is true for qdiscs (i.e. qdiscs have classes, that have other qdiscs)
 276     //
 277     // we need to present a chart with leaf nodes only, so that the sum
 278     // of all dimensions of the chart, will be the total utilization
 279     // of the interface.
 280     //
 281     // here we try to find the ones we need to report
 282     // by default all nodes are marked with: isleaf = 1 (see above)
 283     //
 284     // so, here we remove the isleaf flag from nodes in the middle
 285     // and we add the hasparent flag to leaf nodes we found their parent
 286     for(c = d->classes; c; c = c->next) {
 287         if(unlikely(!c->updated)) continue;
 288
 289         //debug(D_TC_LOOP, "TC: In device '%s', %s '%s'  has leafid: '%s' and parentid '%s'.",
 290         //    d->id,
 291         //    c->isqdisc?"qdisc":"class",
 292         //    c->id,
 293         //    c->leafid?c->leafid:"NULL",
 294         //    c->parentid?c->parentid:"NULL");
 295
 296         // find if c is leaf or not
 297         for(x = d->classes; x; x = x->next) {
 298             if(unlikely(!x->updated || c == x || !x->parentid)) continue;
 299
 300             // classes have both parentid and leafid
 301             // qdiscs have only parentid
 302             // the following works for both (it is an OR)
 303
 304             if( (c->hash == x->parent_hash && strcmp(c->id, x->parentid) == 0) ||
 305                 (c->leafid && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0)) {
 306                 // debug(D_TC_LOOP, "TC: In device '%s', %s '%s' (leafid: '%s') has as leaf %s '%s' (parentid: '%s').", d->name?d->name:d->id, c->isqdisc?"qdisc":"class", c->name?c->name:c->id, c->leafid?c->leafid:c->id, x->isqdisc?"qdisc":"class", x->name?x->name:x->id, x->parentid?x->parentid:x->id);
 307                 c->isleaf = 0;
 308                 x->hasparent = 1;
 309             }
 310         }
 311     }
 312
 313     for(c = d->classes ; c ; c = c->next) {
 314         if(unlikely(!c->updated)) continue;
 315
 316         // debug(D_TC_LOOP, "TC: device '%s', %s '%s' isleaf=%d, hasparent=%d", d->id, (c->isqdisc)?"qdisc":"class", c->id, c->isleaf, c->hasparent);
 317
 318         if(unlikely((c->isleaf && c->hasparent) || d->enabled_all_classes_qdiscs)) {
 319             c->render = 1;
 320             active_nodes++;
 321             bytes_sum += c->bytes;
 322             packets_sum += c->packets;
 323             dropped_sum += c->dropped;
 324             tokens_sum += c->tokens;
 325             ctokens_sum += c->ctokens;
 326         }
 327
 328         //if(unlikely(!c->hasparent)) {
 329         //    if(root) error("TC: multiple root class/qdisc for device '%s' (old: '%s', new: '%s')", d->id, root->id, c->id);
 330         //    root = c;
 331         //    debug(D_TC_LOOP, "TC: found root class/qdisc '%s'", root->id);
 332         //}
 333     }
 334
 335 #ifdef NETDATA_INTERNAL_CHECKS
 336     // dump all the list to see what we know
 337
 338     if(unlikely(debug_flags & D_TC_LOOP)) {
 339         for(c = d->classes ; c ; c = c->next) {
 340             if(c->render) debug(D_TC_LOOP, "TC: final nodes dump for '%s': class %s, OK", d->name, c->id);
 341             else debug(D_TC_LOOP, "TC: final nodes dump for '%s': class %s, IGNORE (updated: %d, isleaf: %d, hasparent: %d, parent: %s)", d->name?d->name:d->id, c->id, c->updated, c->isleaf, c->hasparent, c->parentid?c->parentid:"(unset)");
 342         }
 343     }
 344 #endif
 345
 346     if(unlikely(!active_nodes)) {
 347         debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No useful classes/qdiscs.", d->name?d->name:d->id);
 348         tc_device_classes_cleanup(d);
 349         return;
 350     }
 351
 352     debug(D_TC_LOOP, "TC: evaluating TC device '%s'. enabled = %d/%d (bytes: %d/%d, packets: %d/%d, dropped: %d/%d, tokens: %d/%d, ctokens: %d/%d, all_classes_qdiscs: %d/%d), classes: (bytes = %llu, packets = %llu, dropped = %llu, tokens = %llu, ctokens = %llu).",
 353         d->name?d->name:d->id,
 354         d->enabled, enable_new_interfaces,
 355         d->enabled_bytes, enable_bytes,
 356         d->enabled_packets, enable_packets,
 357         d->enabled_dropped, enable_dropped,
 358         d->enabled_tokens, enable_tokens,
 359         d->enabled_ctokens, enable_ctokens,
 360         d->enabled_all_classes_qdiscs, enabled_all_classes_qdiscs,
 361         bytes_sum,
 362         packets_sum,
 363         dropped_sum,
 364         tokens_sum,
 365         ctokens_sum
 366         );
 367
 368     // --------------------------------------------------------------------
 369     // bytes
 370
 371     if(d->enabled_bytes == CONFIG_ONDEMAND_YES || (d->enabled_bytes == CONFIG_ONDEMAND_ONDEMAND && bytes_sum)) {
 372         d->enabled_bytes = CONFIG_ONDEMAND_YES;
 373
 374         if(unlikely(!d->st_bytes))
 375             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, d->enabled_all_classes_qdiscs ? RRDSET_TYPE_LINE : RRDSET_TYPE_STACKED);
 376
 377         else {
 378             rrdset_next(d->st_bytes);
 379             if(unlikely(d->name_updated)) rrdset_set_name(d->st_bytes, d->name);
 380
 381             // FIXME
 382             // update the family
 383         }
 384
 385         for(c = d->classes ; c ; c = c->next) {
 386             if(unlikely(!c->render)) continue;
 387
 388             if(unlikely(!c->rd_bytes))
 389                 c->rd_bytes = rrddim_add(d->st_bytes, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 390             else if(unlikely(c->name_updated))
 391                 rrddim_set_name(d->st_bytes, c->rd_bytes, c->name);
 392
 393             rrddim_set_by_pointer(d->st_bytes, c->rd_bytes, c->bytes);
 394         }
 395         rrdset_done(d->st_bytes);
 396     }
 397
 398     // --------------------------------------------------------------------
 399     // packets
 400
 401     if(d->enabled_packets == CONFIG_ONDEMAND_YES || (d->enabled_packets == CONFIG_ONDEMAND_ONDEMAND && packets_sum)) {
 402         d->enabled_packets = CONFIG_ONDEMAND_YES;
 403
 404         if(unlikely(!d->st_packets)) {
 405             char id[RRD_ID_LENGTH_MAX + 1];
 406             char name[RRD_ID_LENGTH_MAX + 1];
 407             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_packets", d->id);
 408             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
 409
 410             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, d->enabled_all_classes_qdiscs ? RRDSET_TYPE_LINE : RRDSET_TYPE_STACKED);
 411         }
 412         else {
 413             rrdset_next(d->st_packets);
 414
 415             if(unlikely(d->name_updated)) {
 416                 char name[RRD_ID_LENGTH_MAX + 1];
 417                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
 418                 rrdset_set_name(d->st_packets, name);
 419             }
 420
 421             // FIXME
 422             // update the family
 423         }
 424
 425         for(c = d->classes ; c ; c = c->next) {
 426             if(unlikely(!c->render)) continue;
 427
 428             if(unlikely(!c->rd_packets))
 429                 c->rd_packets = rrddim_add(d->st_packets, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 430             else if(unlikely(c->name_updated))
 431                 rrddim_set_name(d->st_packets, c->rd_packets, c->name);
 432
 433             rrddim_set_by_pointer(d->st_packets, c->rd_packets, c->packets);
 434         }
 435         rrdset_done(d->st_packets);
 436     }
 437
 438     // --------------------------------------------------------------------
 439     // dropped
 440
 441     if(d->enabled_dropped == CONFIG_ONDEMAND_YES || (d->enabled_dropped == CONFIG_ONDEMAND_ONDEMAND && dropped_sum)) {
 442         d->enabled_dropped = CONFIG_ONDEMAND_YES;
 443
 444         if(unlikely(!d->st_dropped)) {
 445             char id[RRD_ID_LENGTH_MAX + 1];
 446             char name[RRD_ID_LENGTH_MAX + 1];
 447             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_dropped", d->id);
 448             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
 449
 450             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, d->enabled_all_classes_qdiscs ? RRDSET_TYPE_LINE : RRDSET_TYPE_STACKED);
 451         }
 452         else {
 453             rrdset_next(d->st_dropped);
 454
 455             if(unlikely(d->name_updated)) {
 456                 char name[RRD_ID_LENGTH_MAX + 1];
 457                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
 458                 rrdset_set_name(d->st_dropped, name);
 459             }
 460
 461             // FIXME
 462             // update the family
 463         }
 464
 465         for(c = d->classes ; c ; c = c->next) {
 466             if(unlikely(!c->render)) continue;
 467
 468             if(unlikely(!c->rd_dropped))
 469                 c->rd_dropped = rrddim_add(d->st_dropped, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 470             else if(unlikely(c->name_updated))
 471                 rrddim_set_name(d->st_dropped, c->rd_dropped, c->name);
 472
 473             rrddim_set_by_pointer(d->st_dropped, c->rd_dropped, c->dropped);
 474         }
 475         rrdset_done(d->st_dropped);
 476     }
 477
 478     // --------------------------------------------------------------------
 479     // tokens
 480
 481     if(d->enabled_tokens == CONFIG_ONDEMAND_YES || (d->enabled_tokens == CONFIG_ONDEMAND_ONDEMAND && tokens_sum)) {
 482         d->enabled_tokens = CONFIG_ONDEMAND_YES;
 483
 484         if(unlikely(!d->st_tokens)) {
 485             char id[RRD_ID_LENGTH_MAX + 1];
 486             char name[RRD_ID_LENGTH_MAX + 1];
 487             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_tokens", d->id);
 488             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_tokens", d->name?d->name:d->id);
 489
 490             d->st_tokens = rrdset_create(RRD_TYPE_TC, id, name, d->family?d->family:d->id, RRD_TYPE_TC ".qos_tokens", "Class Tokens", "tokens", 7030, rrd_update_every, RRDSET_TYPE_LINE);
 491         }
 492         else {
 493             rrdset_next(d->st_tokens);
 494
 495             if(unlikely(d->name_updated)) {
 496                 char name[RRD_ID_LENGTH_MAX + 1];
 497                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_tokens", d->name?d->name:d->id);
 498                 rrdset_set_name(d->st_tokens, name);
 499             }
 500
 501             // FIXME
 502             // update the family
 503         }
 504
 505         for(c = d->classes ; c ; c = c->next) {
 506             if(unlikely(!c->render)) continue;
 507
 508             if(unlikely(!c->rd_tokens)) {
 509                 c->rd_tokens = rrddim_add(d->st_tokens, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_ABSOLUTE);
 510             }
 511             else if(unlikely(c->name_updated))
 512                 rrddim_set_name(d->st_tokens, c->rd_tokens, c->name);
 513
 514             rrddim_set_by_pointer(d->st_tokens, c->rd_tokens, c->tokens);
 515         }
 516         rrdset_done(d->st_tokens);
 517     }
 518
 519     // --------------------------------------------------------------------
 520     // ctokens
 521
 522     if(d->enabled_ctokens == CONFIG_ONDEMAND_YES || (d->enabled_ctokens == CONFIG_ONDEMAND_ONDEMAND && ctokens_sum)) {
 523         d->enabled_ctokens = CONFIG_ONDEMAND_YES;
 524
 525         if(unlikely(!d->st_ctokens)) {
 526             char id[RRD_ID_LENGTH_MAX + 1];
 527             char name[RRD_ID_LENGTH_MAX + 1];
 528             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_ctokens", d->id);
 529             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_ctokens", d->name?d->name:d->id);
 530
 531             d->st_ctokens = rrdset_create(RRD_TYPE_TC, id, name, d->family?d->family:d->id, RRD_TYPE_TC ".qos_ctokens", "Class cTokens", "ctokens", 7040, rrd_update_every, RRDSET_TYPE_LINE);
 532         }
 533         else {
 534             debug(D_TC_LOOP, "TC: Updating _ctokens chart for device '%s'", d->name?d->name:d->id);
 535             rrdset_next(d->st_ctokens);
 536
 537             if(unlikely(d->name_updated)) {
 538                 char name[RRD_ID_LENGTH_MAX + 1];
 539                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_ctokens", d->name?d->name:d->id);
 540                 rrdset_set_name(d->st_ctokens, name);
 541             }
 542
 543             // FIXME
 544             // update the family
 545         }
 546
 547         for(c = d->classes ; c ; c = c->next) {
 548             if(unlikely(!c->render)) continue;
 549
 550             if(unlikely(!c->rd_ctokens))
 551                 c->rd_ctokens = rrddim_add(d->st_ctokens, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_ABSOLUTE);
 552             else if(unlikely(c->name_updated))
 553                 rrddim_set_name(d->st_ctokens, c->rd_ctokens, c->name);
 554
 555             rrddim_set_by_pointer(d->st_ctokens, c->rd_ctokens, c->ctokens);
 556         }
 557         rrdset_done(d->st_ctokens);
 558     }
 559
 560     tc_device_classes_cleanup(d);
 561 }
 562
 563 static inline void tc_device_set_class_name(struct tc_device *d, char *id, char *name) {
 564     if(unlikely(!name || !*name)) return;
 565
 566     struct tc_class *c = tc_class_index_find(d, id, 0);
 567     if(likely(c)) {
 568         if(likely(c->name)) {
 569             if(!strcmp(c->name, name)) return;
 570             freez(c->name);
 571             c->name = NULL;
 572         }
 573
 574         if(likely(name && *name && strcmp(c->id, name) != 0)) {
 575             debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
 576             c->name = strdupz(name);
 577             c->name_updated = 1;
 578         }
 579     }
 580 }
 581
 582 static inline void tc_device_set_device_name(struct tc_device *d, char *name) {
 583     if(unlikely(!name || !*name)) return;
 584
 585     if(d->name) {
 586         if(!strcmp(d->name, name)) return;
 587         freez(d->name);
 588         d->name = NULL;
 589     }
 590
 591     if(likely(name && *name && strcmp(d->id, name))) {
 592         debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
 593         d->name = strdupz(name);
 594         d->name_updated = 1;
 595     }
 596 }
 597
 598 static inline void tc_device_set_device_family(struct tc_device *d, char *family) {
 599     freez(d->family);
 600     d->family = NULL;
 601
 602     if(likely(family && *family && strcmp(d->id, family) != 0)) {
 603         debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
 604         d->family = strdupz(family);
 605         d->family_updated = 1;
 606     }
 607     // no need for null termination - it is already null
 608 }
 609
 610 static inline struct tc_device *tc_device_create(char *id)
 611 {
 612     struct tc_device *d = tc_device_index_find(id, 0);
 613
 614     if(!d) {
 615         debug(D_TC_LOOP, "TC: Creating device '%s'", id);
 616
 617         d = callocz(1, sizeof(struct tc_device));
 618
 619         d->id = strdupz(id);
 620         d->hash = simple_hash(d->id);
 621         d->enabled = (char)-1;
 622
 623         avl_init(&d->classes_index, tc_class_compare);
 624         if(unlikely(tc_device_index_add(d) != d))
 625             error("plugin_tc: INTERNAL ERROR: removing device '%s' removed a different device.", d->id);
 626
 627         if(!tc_device_root) {
 628             tc_device_root = d;
 629         }
 630         else {
 631             d->next = tc_device_root;
 632             tc_device_root->prev = d;
 633             tc_device_root = d;
 634         }
 635     }
 636
 637     return(d);
 638 }
 639
 640 static inline struct tc_class *tc_class_add(struct tc_device *n, char *id, char qdisc, char *parentid, char *leafid)
 641 {
 642     struct tc_class *c = tc_class_index_find(n, id, 0);
 643
 644     if(!c) {
 645         debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
 646
 647         c = callocz(1, sizeof(struct tc_class));
 648
 649         if(n->classes) n->classes->prev = c;
 650         c->next = n->classes;
 651         n->classes = c;
 652
 653         c->id = strdupz(id);
 654         c->hash = simple_hash(c->id);
 655
 656         c->isqdisc = qdisc;
 657         if(parentid && *parentid) {
 658             c->parentid = strdupz(parentid);
 659             c->parent_hash = simple_hash(c->parentid);
 660         }
 661
 662         if(leafid && *leafid) {
 663             c->leafid = strdupz(leafid);
 664             c->leaf_hash = simple_hash(c->leafid);
 665         }
 666
 667         if(unlikely(tc_class_index_add(n, c) != c))
 668             error("plugin_tc: INTERNAL ERROR: attempt index class '%s' on device '%s': already exists", c->id, n->id);
 669     }
 670     return(c);
 671 }
 672
 673 static inline void tc_device_free(struct tc_device *n)
 674 {
 675     if(n->next) n->next->prev = n->prev;
 676     if(n->prev) n->prev->next = n->next;
 677     if(tc_device_root == n) {
 678         if(n->next) tc_device_root = n->next;
 679         else tc_device_root = n->prev;
 680     }
 681
 682     if(unlikely(tc_device_index_del(n) != n))
 683         error("plugin_tc: INTERNAL ERROR: removing device '%s' removed a different device.", n->id);
 684
 685     while(n->classes) tc_class_free(n, n->classes);
 686
 687     freez(n->id);
 688     freez(n->name);
 689     freez(n->family);
 690     freez(n);
 691 }
 692
 693 static inline void tc_device_free_all()
 694 {
 695     while(tc_device_root)
 696         tc_device_free(tc_device_root);
 697 }
 698
 699 #define MAX_WORDS 20
 700
 701 static inline int tc_space(char c) {
 702     switch(c) {
 703     case ' ':
 704     case '\t':
 705     case '\r':
 706     case '\n':
 707         return 1;
 708
 709     default:
 710         return 0;
 711     }
 712 }
 713
 714 static inline void tc_split_words(char *str, char **words, int max_words) {
 715     char *s = str;
 716     int i = 0;
 717
 718     // skip all white space
 719     while(tc_space(*s)) s++;
 720
 721     // store the first word
 722     words[i++] = s;
 723
 724     // while we have something
 725     while(*s) {
 726         // if it is a space
 727         if(unlikely(tc_space(*s))) {
 728
 729             // terminate the word
 730             *s++ = '\0';
 731
 732             // skip all white space
 733             while(tc_space(*s)) s++;
 734
 735             // if we reached the end, stop
 736             if(!*s) break;
 737
 738             // store the next word
 739             if(i < max_words) words[i++] = s;
 740             else break;
 741         }
 742         else s++;
 743     }
 744
 745     // terminate the words
 746     while(i < max_words) words[i++] = NULL;
 747 }
 748
 749 volatile pid_t tc_child_pid = 0;
 750 void *tc_main(void *ptr) {
 751     struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
 752
 753     info("TC thread created with task id %d", gettid());
 754
 755     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 756         error("Cannot set pthread cancel type to DEFERRED.");
 757
 758     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 759         error("Cannot set pthread cancel state to ENABLE.");
 760
 761     struct rusage thread;
 762     RRDSET *stcpu = NULL, *sttime = NULL;
 763
 764     char buffer[TC_LINE_MAX+1] = "";
 765     char *words[MAX_WORDS] = { NULL };
 766
 767     uint32_t BEGIN_HASH = simple_hash("BEGIN");
 768     uint32_t END_HASH = simple_hash("END");
 769     uint32_t QDISC_HASH = simple_hash("qdisc");
 770     uint32_t CLASS_HASH = simple_hash("class");
 771     uint32_t SENT_HASH = simple_hash("Sent");
 772     uint32_t LENDED_HASH = simple_hash("lended:");
 773     uint32_t TOKENS_HASH = simple_hash("tokens:");
 774     uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
 775     uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
 776     uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
 777     uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
 778 #ifdef DETACH_PLUGINS_FROM_NETDATA
 779     uint32_t MYPID_HASH = simple_hash("MYPID");
 780 #endif
 781     uint32_t first_hash;
 782
 783     snprintfz(buffer, TC_LINE_MAX, "%s/tc-qos-helper.sh", config_get("plugins", "plugins directory", PLUGINS_DIR));
 784     char *tc_script = config_get("plugin:tc", "script to run to get tc values", buffer);
 785
 786     for(;1;) {
 787         if(unlikely(netdata_exit)) break;
 788
 789         FILE *fp;
 790         struct tc_device *device = NULL;
 791         struct tc_class *class = NULL;
 792
 793         snprintfz(buffer, TC_LINE_MAX, "exec %s %d", tc_script, rrd_update_every);
 794         debug(D_TC_LOOP, "executing '%s'", buffer);
 795
 796         fp = mypopen(buffer, (pid_t *)&tc_child_pid);
 797         if(unlikely(!fp)) {
 798             error("TC: Cannot popen(\"%s\", \"r\").", buffer);
 799             goto cleanup;
 800         }
 801
 802         while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
 803             if(unlikely(netdata_exit)) break;
 804
 805             buffer[TC_LINE_MAX] = '\0';
 806             // debug(D_TC_LOOP, "TC: read '%s'", buffer);
 807
 808             tc_split_words(buffer, words, MAX_WORDS);
 809
 810             if(unlikely(!words[0] || !*words[0])) {
 811                 // debug(D_TC_LOOP, "empty line");
 812                 continue;
 813             }
 814             // else debug(D_TC_LOOP, "First word is '%s'", words[0]);
 815
 816             first_hash = simple_hash(words[0]);
 817
 818             if(unlikely(device && ((first_hash == CLASS_HASH && strcmp(words[0], "class") == 0) ||  (first_hash == QDISC_HASH && strcmp(words[0], "qdisc") == 0)))) {
 819                 // 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]);
 820
 821                 char *type     = words[1];  // the class/qdisc type: htb, fq_codel, etc
 822                 char *id       = words[2];  // the class/qdisc major:minor
 823                 char *parent   = words[3];  // the word 'parent' or 'root'
 824                 char *parentid = words[4];  // parentid
 825                 char *leaf     = words[5];  // the word 'leaf'
 826                 char *leafid   = words[6];  // leafid
 827
 828                 int parent_is_root = 0;
 829                 int parent_is_parent = 0;
 830                 if(likely(parent)) {
 831                     parent_is_parent = !strcmp(parent, "parent");
 832
 833                     if(!parent_is_parent)
 834                         parent_is_root = !strcmp(parent, "root");
 835                 }
 836
 837                 if(likely(type && id && (parent_is_root || parent_is_parent))) {
 838                     char qdisc = 0;
 839
 840                     if(first_hash == QDISC_HASH) {
 841                         qdisc = 1;
 842
 843                         if(!strcmp(type, "ingress")) {
 844                             // we don't want to get the ingress qdisc
 845                             // there should be an IFB interface for this
 846
 847                             class = NULL;
 848                             continue;
 849                         }
 850
 851                         if(parent_is_parent && parentid) {
 852                             // eliminate the minor number from parentid
 853                             // why: parentid is the id of the parent class
 854                             // but major: is also the id of the parent qdisc
 855
 856                             char *s = parentid;
 857                             while(*s && *s != ':') s++;
 858                             if(*s == ':') s[1] = '\0';
 859                         }
 860                     }
 861
 862                     if(parent_is_root) {
 863                         parentid = NULL;
 864                         leafid = NULL;
 865                     }
 866                     else if(!leaf || strcmp(leaf, "leaf") != 0)
 867                         leafid = NULL;
 868
 869                     char leafbuf[20 + 1] = "";
 870                     if(leafid && leafid[strlen(leafid) - 1] == ':') {
 871                         strncpyz(leafbuf, leafid, 20 - 1);
 872                         strcat(leafbuf, "1");
 873                         leafid = leafbuf;
 874                     }
 875
 876                     class = tc_class_add(device, id, qdisc, parentid, leafid);
 877                 }
 878                 else {
 879                     // clear the last class
 880                     class = NULL;
 881                 }
 882             }
 883             else if(unlikely(first_hash == END_HASH && strcmp(words[0], "END") == 0)) {
 884                 // debug(D_TC_LOOP, "END line");
 885
 886                 if(likely(device)) {
 887                     if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 888                         error("Cannot set pthread cancel state to DISABLE.");
 889
 890                     tc_device_commit(device);
 891                     // tc_device_free(device);
 892
 893                     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 894                         error("Cannot set pthread cancel state to ENABLE.");
 895                 }
 896
 897                 device = NULL;
 898                 class = NULL;
 899             }
 900             else if(unlikely(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0)) {
 901                 // debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
 902
 903                 if(likely(words[1] && *words[1])) {
 904                     device = tc_device_create(words[1]);
 905                 }
 906                 else {
 907                     // tc_device_free(device);
 908                     device = NULL;
 909                 }
 910
 911                 class = NULL;
 912             }
 913             else if(unlikely(device && class && first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0)) {
 914                 // debug(D_TC_LOOP, "SENT line '%s'", words[1]);
 915                 if(likely(words[1] && *words[1])) {
 916                     class->bytes = str2ull(words[1]);
 917                     class->updated = 1;
 918                 }
 919                 else {
 920                     class->updated = 0;
 921                 }
 922
 923                 if(likely(words[3] && *words[3]))
 924                     class->packets = str2ull(words[3]);
 925
 926                 if(likely(words[6] && *words[6]))
 927                     class->dropped = str2ull(words[6]);
 928
 929                 if(likely(words[8] && *words[8]))
 930                     class->overlimits = str2ull(words[8]);
 931
 932                 if(likely(words[10] && *words[10]))
 933                     class->requeues = str2ull(words[8]);
 934             }
 935             else if(unlikely(device && class && class->updated && first_hash == LENDED_HASH && strcmp(words[0], "lended:") == 0)) {
 936                 // debug(D_TC_LOOP, "LENDED line '%s'", words[1]);
 937                 if(likely(words[1] && *words[1]))
 938                     class->lended = str2ull(words[1]);
 939
 940                 if(likely(words[3] && *words[3]))
 941                     class->borrowed = str2ull(words[3]);
 942
 943                 if(likely(words[5] && *words[5]))
 944                     class->giants = str2ull(words[5]);
 945             }
 946             else if(unlikely(device && class && class->updated && first_hash == TOKENS_HASH && strcmp(words[0], "tokens:") == 0)) {
 947                 // debug(D_TC_LOOP, "TOKENS line '%s'", words[1]);
 948                 if(likely(words[1] && *words[1]))
 949                     class->tokens = str2ull(words[1]);
 950
 951                 if(likely(words[3] && *words[3]))
 952                     class->ctokens = str2ull(words[3]);
 953             }
 954             else if(unlikely(device && first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0)) {
 955                 // debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
 956                 if(likely(words[1] && *words[1]))
 957                     tc_device_set_device_name(device, words[1]);
 958             }
 959             else if(unlikely(device && first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0)) {
 960                 // debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
 961                 if(likely(words[1] && *words[1]))
 962                     tc_device_set_device_family(device, words[1]);
 963             }
 964             else if(unlikely(device && first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0)) {
 965                 // debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
 966                 char *id    = words[1];
 967                 char *path  = words[2];
 968                 if(likely(id && *id && path && *path))
 969                     tc_device_set_class_name(device, id, path);
 970             }
 971             else if(unlikely(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0)) {
 972                 // debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
 973                 getrusage(RUSAGE_THREAD, &thread);
 974
 975                 if(unlikely(!stcpu)) stcpu = rrdset_find("netdata.plugin_tc_cpu");
 976                 if(unlikely(!stcpu)) {
 977                     stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "tc.helper", NULL, "NetData TC CPU usage", "milliseconds/s", 135000, rrd_update_every, RRDSET_TYPE_STACKED);
 978                     rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
 979                     rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
 980                 }
 981                 else rrdset_next(stcpu);
 982
 983                 rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
 984                 rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
 985                 rrdset_done(stcpu);
 986
 987                 if(unlikely(!sttime)) stcpu = rrdset_find("netdata.plugin_tc_time");
 988                 if(unlikely(!sttime)) {
 989                     sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "tc.helper", NULL, "NetData TC script execution", "milliseconds/run", 135001, rrd_update_every, RRDSET_TYPE_AREA);
 990                     rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
 991                 }
 992                 else rrdset_next(sttime);
 993
 994                 rrddim_set(sttime, "run_time", atoll(words[1]));
 995                 rrdset_done(sttime);
 996
 997             }
 998 #ifdef DETACH_PLUGINS_FROM_NETDATA
 999             else if(unlikely(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0))) {
1000                 // debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
1001                 char *id = words[1];
1002                 pid_t pid = atol(id);
1003
1004                 if(likely(pid)) tc_child_pid = pid;
1005
1006                 debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
1007             }
1008 #endif
1009             //else {
1010             //  debug(D_TC_LOOP, "IGNORED line");
1011             //}
1012         }
1013
1014         // fgets() failed or loop broke
1015         int code = mypclose(fp, (pid_t)tc_child_pid);
1016         tc_child_pid = 0;
1017
1018         if(unlikely(device)) {
1019             // tc_device_free(device);
1020             device = NULL;
1021             class = NULL;
1022         }
1023
1024         if(unlikely(netdata_exit)) {
1025             tc_device_free_all();
1026             goto cleanup;
1027         }
1028
1029         if(code == 1 || code == 127) {
1030             // 1 = DISABLE
1031             // 127 = cannot even run it
1032             error("TC: tc-qos-helper.sh exited with code %d. Disabling it.", code);
1033
1034             tc_device_free_all();
1035             goto cleanup;
1036         }
1037
1038         sleep((unsigned int) rrd_update_every);
1039     }
1040
1041 cleanup:
1042     info("TC thread exiting");
1043
1044     static_thread->enabled = 0;
1045     pthread_exit(NULL);
1046     return NULL;
1047 }