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     for(c = d->classes ; c ; c = c->next) {
 234         c->render = 0;
 235
 236         c->isleaf = 1;
 237         c->hasparent = 0;
 238
 239         if(unlikely(!c->updated))
 240             c->unupdated++;
 241         else {
 242             c->unupdated = 0;
 243
 244             if(c->isqdisc)
 245                 updated_qdiscs++;
 246             else
 247                 updated_classes++;
 248         }
 249     }
 250
 251     if(unlikely(!d->enabled || (!updated_classes && !updated_qdiscs))) {
 252         debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. It is not enabled/updated.", d->name?d->name:d->id);
 253         tc_device_classes_cleanup(d);
 254         return;
 255     }
 256
 257     if(unlikely(updated_classes && updated_qdiscs)) {
 258         error("TC: device '%s' has active both classes (%d) and qdiscs (%d). Will render only qdiscs.", d->id, updated_classes, updated_qdiscs);
 259         for(c = d->classes ; c ; c = c->next)
 260             if(unlikely(!c->isqdisc && c->updated))
 261                 c->updated = 0;
 262
 263         updated_classes = 0;
 264     }
 265
 266     // mark the classes as leafs and parents
 267     for(c = d->classes; c; c = c->next) {
 268         if(unlikely(!c->updated)) continue;
 269
 270         // find if c is leaf or not
 271         for(x = d->classes; x; x = x->next) {
 272             if(unlikely(!x->updated || c == x || !x->parentid)) continue;
 273
 274             if( (c->hash == x->parent_hash && strcmp(c->id, x->parentid) == 0) ||
 275                 (c->leafid && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0)) {
 276                 // 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);
 277                 c->isleaf = 0;
 278                 x->hasparent = 1;
 279             }
 280         }
 281     }
 282
 283     // debugging only
 284     /*
 285     if(unlikely(debug_flags & D_TC_LOOP)) {
 286         for(c = d->classes ; c ; c = c->next) {
 287             if((c->isleaf && c->hasparent) || d->enabled_all_classes_qdiscs) debug(D_TC_LOOP, "TC: Device '%s', class %s, OK", d->name, c->id);
 288             else debug(D_TC_LOOP, "TC: Device '%s', class %s, IGNORE (isleaf: %d, hasparent: %d, parent: %s)", d->name?d->name:d->id, c->id, c->isleaf, c->hasparent, c->parentid?c->parentid:"(unset)");
 289         }
 290     }
 291     */
 292
 293     for(c = d->classes ; c ; c = c->next) {
 294         if(unlikely(!c->updated)) continue;
 295
 296         // 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);
 297
 298         if(unlikely((c->isleaf && c->hasparent) || d->enabled_all_classes_qdiscs)) {
 299             c->render = 1;
 300             active_nodes++;
 301             bytes_sum += c->bytes;
 302             packets_sum += c->packets;
 303             dropped_sum += c->dropped;
 304             tokens_sum += c->tokens;
 305             ctokens_sum += c->ctokens;
 306         }
 307
 308         //if(unlikely(!c->hasparent)) {
 309         //    if(root) error("TC: multiple root class/qdisc for device '%s' (old: '%s', new: '%s')", d->id, root->id, c->id);
 310         //    root = c;
 311         //    debug(D_TC_LOOP, "TC: found root class/qdisc '%s'", root->id);
 312         //}
 313     }
 314
 315     if(unlikely(!active_nodes)) {
 316         debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No useful classes/qdiscs.", d->name?d->name:d->id);
 317         tc_device_classes_cleanup(d);
 318         return;
 319     }
 320
 321     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).",
 322         d->name?d->name:d->id,
 323         d->enabled, enable_new_interfaces,
 324         d->enabled_bytes, enable_bytes,
 325         d->enabled_packets, enable_packets,
 326         d->enabled_dropped, enable_dropped,
 327         d->enabled_tokens, enable_tokens,
 328         d->enabled_ctokens, enable_ctokens,
 329         d->enabled_all_classes_qdiscs, enabled_all_classes_qdiscs,
 330         bytes_sum,
 331         packets_sum,
 332         dropped_sum,
 333         tokens_sum,
 334         ctokens_sum
 335         );
 336
 337     // --------------------------------------------------------------------
 338     // bytes
 339
 340     if(d->enabled_bytes == CONFIG_ONDEMAND_YES || (d->enabled_bytes == CONFIG_ONDEMAND_ONDEMAND && bytes_sum)) {
 341         d->enabled_bytes = CONFIG_ONDEMAND_YES;
 342
 343         if(unlikely(!d->st_bytes))
 344             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);
 345
 346         else {
 347             rrdset_next(d->st_bytes);
 348             if(unlikely(d->name_updated)) rrdset_set_name(d->st_bytes, d->name);
 349
 350             // FIXME
 351             // update the family
 352         }
 353
 354         for(c = d->classes ; c ; c = c->next) {
 355             if(unlikely(!c->render)) continue;
 356
 357             if(unlikely(!c->rd_bytes))
 358                 c->rd_bytes = rrddim_add(d->st_bytes, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 359             else if(unlikely(c->name_updated))
 360                 rrddim_set_name(d->st_bytes, c->rd_bytes, c->name);
 361
 362             rrddim_set_by_pointer(d->st_bytes, c->rd_bytes, c->bytes);
 363         }
 364         rrdset_done(d->st_bytes);
 365     }
 366
 367     // --------------------------------------------------------------------
 368     // packets
 369
 370     if(d->enabled_packets == CONFIG_ONDEMAND_YES || (d->enabled_packets == CONFIG_ONDEMAND_ONDEMAND && packets_sum)) {
 371         d->enabled_packets = CONFIG_ONDEMAND_YES;
 372
 373         if(unlikely(!d->st_packets)) {
 374             char id[RRD_ID_LENGTH_MAX + 1];
 375             char name[RRD_ID_LENGTH_MAX + 1];
 376             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_packets", d->id);
 377             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
 378
 379             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);
 380         }
 381         else {
 382             rrdset_next(d->st_packets);
 383
 384             if(unlikely(d->name_updated)) {
 385                 char name[RRD_ID_LENGTH_MAX + 1];
 386                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
 387                 rrdset_set_name(d->st_packets, name);
 388             }
 389
 390             // FIXME
 391             // update the family
 392         }
 393
 394         for(c = d->classes ; c ; c = c->next) {
 395             if(unlikely(!c->render)) continue;
 396
 397             if(unlikely(!c->rd_packets))
 398                 c->rd_packets = rrddim_add(d->st_packets, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 399             else if(unlikely(c->name_updated))
 400                 rrddim_set_name(d->st_packets, c->rd_packets, c->name);
 401
 402             rrddim_set_by_pointer(d->st_packets, c->rd_packets, c->packets);
 403         }
 404         rrdset_done(d->st_packets);
 405     }
 406
 407     // --------------------------------------------------------------------
 408     // dropped
 409
 410     if(d->enabled_dropped == CONFIG_ONDEMAND_YES || (d->enabled_dropped == CONFIG_ONDEMAND_ONDEMAND && dropped_sum)) {
 411         d->enabled_dropped = CONFIG_ONDEMAND_YES;
 412
 413         if(unlikely(!d->st_dropped)) {
 414             char id[RRD_ID_LENGTH_MAX + 1];
 415             char name[RRD_ID_LENGTH_MAX + 1];
 416             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_dropped", d->id);
 417             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
 418
 419             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);
 420         }
 421         else {
 422             rrdset_next(d->st_dropped);
 423
 424             if(unlikely(d->name_updated)) {
 425                 char name[RRD_ID_LENGTH_MAX + 1];
 426                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
 427                 rrdset_set_name(d->st_dropped, name);
 428             }
 429
 430             // FIXME
 431             // update the family
 432         }
 433
 434         for(c = d->classes ; c ; c = c->next) {
 435             if(unlikely(!c->render)) continue;
 436
 437             if(unlikely(!c->rd_dropped))
 438                 c->rd_dropped = rrddim_add(d->st_dropped, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 439             else if(unlikely(c->name_updated))
 440                 rrddim_set_name(d->st_dropped, c->rd_dropped, c->name);
 441
 442             rrddim_set_by_pointer(d->st_dropped, c->rd_dropped, c->dropped);
 443         }
 444         rrdset_done(d->st_dropped);
 445     }
 446
 447     // --------------------------------------------------------------------
 448     // tokens
 449
 450     if(d->enabled_tokens == CONFIG_ONDEMAND_YES || (d->enabled_tokens == CONFIG_ONDEMAND_ONDEMAND && tokens_sum)) {
 451         d->enabled_tokens = CONFIG_ONDEMAND_YES;
 452
 453         if(unlikely(!d->st_tokens)) {
 454             char id[RRD_ID_LENGTH_MAX + 1];
 455             char name[RRD_ID_LENGTH_MAX + 1];
 456             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_tokens", d->id);
 457             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_tokens", d->name?d->name:d->id);
 458
 459             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);
 460         }
 461         else {
 462             rrdset_next(d->st_tokens);
 463
 464             if(unlikely(d->name_updated)) {
 465                 char name[RRD_ID_LENGTH_MAX + 1];
 466                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_tokens", d->name?d->name:d->id);
 467                 rrdset_set_name(d->st_tokens, name);
 468             }
 469
 470             // FIXME
 471             // update the family
 472         }
 473
 474         for(c = d->classes ; c ; c = c->next) {
 475             if(unlikely(!c->render)) continue;
 476
 477             if(unlikely(!c->rd_tokens)) {
 478                 c->rd_tokens = rrddim_add(d->st_tokens, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_ABSOLUTE);
 479             }
 480             else if(unlikely(c->name_updated))
 481                 rrddim_set_name(d->st_tokens, c->rd_tokens, c->name);
 482
 483             rrddim_set_by_pointer(d->st_tokens, c->rd_tokens, c->tokens);
 484         }
 485         rrdset_done(d->st_tokens);
 486     }
 487
 488     // --------------------------------------------------------------------
 489     // ctokens
 490
 491     if(d->enabled_ctokens == CONFIG_ONDEMAND_YES || (d->enabled_ctokens == CONFIG_ONDEMAND_ONDEMAND && ctokens_sum)) {
 492         d->enabled_ctokens = CONFIG_ONDEMAND_YES;
 493
 494         if(unlikely(!d->st_ctokens)) {
 495             char id[RRD_ID_LENGTH_MAX + 1];
 496             char name[RRD_ID_LENGTH_MAX + 1];
 497             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_ctokens", d->id);
 498             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_ctokens", d->name?d->name:d->id);
 499
 500             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);
 501         }
 502         else {
 503             debug(D_TC_LOOP, "TC: Updating _ctokens chart for device '%s'", d->name?d->name:d->id);
 504             rrdset_next(d->st_ctokens);
 505
 506             if(unlikely(d->name_updated)) {
 507                 char name[RRD_ID_LENGTH_MAX + 1];
 508                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_ctokens", d->name?d->name:d->id);
 509                 rrdset_set_name(d->st_ctokens, name);
 510             }
 511
 512             // FIXME
 513             // update the family
 514         }
 515
 516         for(c = d->classes ; c ; c = c->next) {
 517             if(unlikely(!c->render)) continue;
 518
 519             if(unlikely(!c->rd_ctokens))
 520                 c->rd_ctokens = rrddim_add(d->st_ctokens, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_ABSOLUTE);
 521             else if(unlikely(c->name_updated))
 522                 rrddim_set_name(d->st_ctokens, c->rd_ctokens, c->name);
 523
 524             rrddim_set_by_pointer(d->st_ctokens, c->rd_ctokens, c->ctokens);
 525         }
 526         rrdset_done(d->st_ctokens);
 527     }
 528
 529     tc_device_classes_cleanup(d);
 530 }
 531
 532 static inline void tc_device_set_class_name(struct tc_device *d, char *id, char *name) {
 533     if(unlikely(!name || !*name)) return;
 534
 535     struct tc_class *c = tc_class_index_find(d, id, 0);
 536     if(likely(c)) {
 537         if(likely(c->name)) {
 538             if(!strcmp(c->name, name)) return;
 539             freez(c->name);
 540             c->name = NULL;
 541         }
 542
 543         if(likely(name && *name && strcmp(c->id, name) != 0)) {
 544             debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
 545             c->name = strdupz(name);
 546             c->name_updated = 1;
 547         }
 548     }
 549 }
 550
 551 static inline void tc_device_set_device_name(struct tc_device *d, char *name) {
 552     if(unlikely(!name || !*name)) return;
 553
 554     if(d->name) {
 555         if(!strcmp(d->name, name)) return;
 556         freez(d->name);
 557         d->name = NULL;
 558     }
 559
 560     if(likely(name && *name && strcmp(d->id, name))) {
 561         debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
 562         d->name = strdupz(name);
 563         d->name_updated = 1;
 564     }
 565 }
 566
 567 static inline void tc_device_set_device_family(struct tc_device *d, char *family) {
 568     freez(d->family);
 569     d->family = NULL;
 570
 571     if(likely(family && *family && strcmp(d->id, family) != 0)) {
 572         debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
 573         d->family = strdupz(family);
 574         d->family_updated = 1;
 575     }
 576     // no need for null termination - it is already null
 577 }
 578
 579 static inline struct tc_device *tc_device_create(char *id)
 580 {
 581     struct tc_device *d = tc_device_index_find(id, 0);
 582
 583     if(!d) {
 584         debug(D_TC_LOOP, "TC: Creating device '%s'", id);
 585
 586         d = callocz(1, sizeof(struct tc_device));
 587
 588         d->id = strdupz(id);
 589         d->hash = simple_hash(d->id);
 590         d->enabled = (char)-1;
 591
 592         avl_init(&d->classes_index, tc_class_compare);
 593         if(unlikely(tc_device_index_add(d) != d))
 594             error("plugin_tc: INTERNAL ERROR: removing device '%s' removed a different device.", d->id);
 595
 596         if(!tc_device_root) {
 597             tc_device_root = d;
 598         }
 599         else {
 600             d->next = tc_device_root;
 601             tc_device_root->prev = d;
 602             tc_device_root = d;
 603         }
 604     }
 605
 606     return(d);
 607 }
 608
 609 static inline struct tc_class *tc_class_add(struct tc_device *n, char *id, char qdisc, char *parentid, char *leafid)
 610 {
 611     struct tc_class *c = tc_class_index_find(n, id, 0);
 612
 613     if(!c) {
 614         debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
 615
 616         c = callocz(1, sizeof(struct tc_class));
 617
 618         if(n->classes) n->classes->prev = c;
 619         c->next = n->classes;
 620         n->classes = c;
 621
 622         c->id = strdupz(id);
 623         c->hash = simple_hash(c->id);
 624
 625         c->isqdisc = qdisc;
 626         if(parentid && *parentid) {
 627             c->parentid = strdupz(parentid);
 628             c->parent_hash = simple_hash(c->parentid);
 629         }
 630
 631         if(leafid && *leafid) {
 632             c->leafid = strdupz(leafid);
 633             c->leaf_hash = simple_hash(c->leafid);
 634         }
 635
 636         if(unlikely(tc_class_index_add(n, c) != c))
 637             error("plugin_tc: INTERNAL ERROR: attempt index class '%s' on device '%s': already exists", c->id, n->id);
 638     }
 639     return(c);
 640 }
 641
 642 static inline void tc_device_free(struct tc_device *n)
 643 {
 644     if(n->next) n->next->prev = n->prev;
 645     if(n->prev) n->prev->next = n->next;
 646     if(tc_device_root == n) {
 647         if(n->next) tc_device_root = n->next;
 648         else tc_device_root = n->prev;
 649     }
 650
 651     if(unlikely(tc_device_index_del(n) != n))
 652         error("plugin_tc: INTERNAL ERROR: removing device '%s' removed a different device.", n->id);
 653
 654     while(n->classes) tc_class_free(n, n->classes);
 655
 656     freez(n->id);
 657     freez(n->name);
 658     freez(n->family);
 659     freez(n);
 660 }
 661
 662 static inline void tc_device_free_all()
 663 {
 664     while(tc_device_root)
 665         tc_device_free(tc_device_root);
 666 }
 667
 668 #define MAX_WORDS 20
 669
 670 static inline int tc_space(char c) {
 671     switch(c) {
 672     case ' ':
 673     case '\t':
 674     case '\r':
 675     case '\n':
 676         return 1;
 677
 678     default:
 679         return 0;
 680     }
 681 }
 682
 683 static inline void tc_split_words(char *str, char **words, int max_words) {
 684     char *s = str;
 685     int i = 0;
 686
 687     // skip all white space
 688     while(tc_space(*s)) s++;
 689
 690     // store the first word
 691     words[i++] = s;
 692
 693     // while we have something
 694     while(*s) {
 695         // if it is a space
 696         if(unlikely(tc_space(*s))) {
 697
 698             // terminate the word
 699             *s++ = '\0';
 700
 701             // skip all white space
 702             while(tc_space(*s)) s++;
 703
 704             // if we reached the end, stop
 705             if(!*s) break;
 706
 707             // store the next word
 708             if(i < max_words) words[i++] = s;
 709             else break;
 710         }
 711         else s++;
 712     }
 713
 714     // terminate the words
 715     while(i < max_words) words[i++] = NULL;
 716 }
 717
 718 volatile pid_t tc_child_pid = 0;
 719 void *tc_main(void *ptr) {
 720     struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
 721
 722     info("TC thread created with task id %d", gettid());
 723
 724     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 725         error("Cannot set pthread cancel type to DEFERRED.");
 726
 727     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 728         error("Cannot set pthread cancel state to ENABLE.");
 729
 730     struct rusage thread;
 731     RRDSET *stcpu = NULL, *sttime = NULL;
 732
 733     char buffer[TC_LINE_MAX+1] = "";
 734     char *words[MAX_WORDS] = { NULL };
 735
 736     uint32_t BEGIN_HASH = simple_hash("BEGIN");
 737     uint32_t END_HASH = simple_hash("END");
 738     uint32_t QDISC_HASH = simple_hash("qdisc");
 739     uint32_t CLASS_HASH = simple_hash("class");
 740     uint32_t SENT_HASH = simple_hash("Sent");
 741     uint32_t LENDED_HASH = simple_hash("lended:");
 742     uint32_t TOKENS_HASH = simple_hash("tokens:");
 743     uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
 744     uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
 745     uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
 746     uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
 747 #ifdef DETACH_PLUGINS_FROM_NETDATA
 748     uint32_t MYPID_HASH = simple_hash("MYPID");
 749 #endif
 750     uint32_t first_hash;
 751
 752     snprintfz(buffer, TC_LINE_MAX, "%s/tc-qos-helper.sh", config_get("plugins", "plugins directory", PLUGINS_DIR));
 753     char *tc_script = config_get("plugin:tc", "script to run to get tc values", buffer);
 754
 755     for(;1;) {
 756         if(unlikely(netdata_exit)) break;
 757
 758         FILE *fp;
 759         struct tc_device *device = NULL;
 760         struct tc_class *class = NULL;
 761
 762         snprintfz(buffer, TC_LINE_MAX, "exec %s %d", tc_script, rrd_update_every);
 763         debug(D_TC_LOOP, "executing '%s'", buffer);
 764
 765         fp = mypopen(buffer, (pid_t *)&tc_child_pid);
 766         if(unlikely(!fp)) {
 767             error("TC: Cannot popen(\"%s\", \"r\").", buffer);
 768             goto cleanup;
 769         }
 770
 771         while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
 772             if(unlikely(netdata_exit)) break;
 773
 774             buffer[TC_LINE_MAX] = '\0';
 775             // debug(D_TC_LOOP, "TC: read '%s'", buffer);
 776
 777             tc_split_words(buffer, words, MAX_WORDS);
 778
 779             if(unlikely(!words[0] || !*words[0])) {
 780                 // debug(D_TC_LOOP, "empty line");
 781                 continue;
 782             }
 783             // else debug(D_TC_LOOP, "First word is '%s'", words[0]);
 784
 785             first_hash = simple_hash(words[0]);
 786
 787             if(unlikely(device && ((first_hash == CLASS_HASH && strcmp(words[0], "class") == 0) ||  (first_hash == QDISC_HASH && strcmp(words[0], "qdisc") == 0)))) {
 788                 // 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]);
 789
 790                 // words[1] : class type
 791                 // words[2] : N:XX
 792                 // words[3] : parent or root
 793                 if(likely(words[1] && words[2] && words[3] && (strcmp(words[3], "parent") == 0 || strcmp(words[3], "root") == 0))) {
 794                     //char *type     = words[1];  // the class: htb, fq_codel, etc
 795
 796                     // we are only interested for HTB classes
 797                     //if(strcmp(type, "htb") != 0) continue;
 798
 799                     char *id       = words[2];  // the class major:minor
 800                     char *parent   = words[3];  // 'parent' or 'root'
 801                     char *parentid = words[4];  // the parent's id
 802                     char *leaf     = words[5];  // 'leaf'
 803                     char *leafid   = words[6];  // leafid
 804                     char qdisc = 0;
 805
 806                     if(first_hash == QDISC_HASH)
 807                         qdisc = 1;
 808
 809                     if(strcmp(parent, "root") == 0) {
 810                         parentid = NULL;
 811                         leafid = NULL;
 812                     }
 813                     else if(!leaf || strcmp(leaf, "leaf") != 0)
 814                         leafid = NULL;
 815
 816                     char leafbuf[20 + 1] = "";
 817                     if(leafid && leafid[strlen(leafid) - 1] == ':') {
 818                         strncpyz(leafbuf, leafid, 20 - 1);
 819                         strcat(leafbuf, "1");
 820                         leafid = leafbuf;
 821                     }
 822
 823                     class = tc_class_add(device, id, qdisc, parentid, leafid);
 824                 }
 825                 else {
 826                     // clear the last class
 827                     class = NULL;
 828                 }
 829             }
 830             else if(unlikely(first_hash == END_HASH && strcmp(words[0], "END") == 0)) {
 831                 // debug(D_TC_LOOP, "END line");
 832
 833                 if(likely(device)) {
 834                     if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 835                         error("Cannot set pthread cancel state to DISABLE.");
 836
 837                     tc_device_commit(device);
 838                     // tc_device_free(device);
 839
 840                     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 841                         error("Cannot set pthread cancel state to ENABLE.");
 842                 }
 843
 844                 device = NULL;
 845                 class = NULL;
 846             }
 847             else if(unlikely(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0)) {
 848                 // debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
 849
 850                 if(likely(words[1] && *words[1])) {
 851                     device = tc_device_create(words[1]);
 852                 }
 853                 else {
 854                     // tc_device_free(device);
 855                     device = NULL;
 856                 }
 857
 858                 class = NULL;
 859             }
 860             else if(unlikely(device && class && first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0)) {
 861                 // debug(D_TC_LOOP, "SENT line '%s'", words[1]);
 862                 if(likely(words[1] && *words[1])) {
 863                     class->bytes = str2ull(words[1]);
 864                     class->updated = 1;
 865                 }
 866                 else {
 867                     class->updated = 0;
 868                 }
 869
 870                 if(likely(words[3] && *words[3]))
 871                     class->packets = str2ull(words[3]);
 872
 873                 if(likely(words[6] && *words[6]))
 874                     class->dropped = str2ull(words[6]);
 875
 876                 if(likely(words[8] && *words[8]))
 877                     class->overlimits = str2ull(words[8]);
 878
 879                 if(likely(words[10] && *words[10]))
 880                     class->requeues = str2ull(words[8]);
 881             }
 882             else if(unlikely(device && class && class->updated && first_hash == LENDED_HASH && strcmp(words[0], "lended:") == 0)) {
 883                 // debug(D_TC_LOOP, "LENDED line '%s'", words[1]);
 884                 if(likely(words[1] && *words[1]))
 885                     class->lended = str2ull(words[1]);
 886
 887                 if(likely(words[3] && *words[3]))
 888                     class->borrowed = str2ull(words[3]);
 889
 890                 if(likely(words[5] && *words[5]))
 891                     class->giants = str2ull(words[5]);
 892             }
 893             else if(unlikely(device && class && class->updated && first_hash == TOKENS_HASH && strcmp(words[0], "tokens:") == 0)) {
 894                 // debug(D_TC_LOOP, "TOKENS line '%s'", words[1]);
 895                 if(likely(words[1] && *words[1]))
 896                     class->tokens = str2ull(words[1]);
 897
 898                 if(likely(words[3] && *words[3]))
 899                     class->ctokens = str2ull(words[3]);
 900             }
 901             else if(unlikely(device && first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0)) {
 902                 // debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
 903                 if(likely(words[1] && *words[1]))
 904                     tc_device_set_device_name(device, words[1]);
 905             }
 906             else if(unlikely(device && first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0)) {
 907                 // debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
 908                 if(likely(words[1] && *words[1]))
 909                     tc_device_set_device_family(device, words[1]);
 910             }
 911             else if(unlikely(device && first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0)) {
 912                 // debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
 913                 char *id    = words[1];
 914                 char *path  = words[2];
 915                 if(likely(id && *id && path && *path))
 916                     tc_device_set_class_name(device, id, path);
 917             }
 918             else if(unlikely(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0)) {
 919                 // debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
 920                 getrusage(RUSAGE_THREAD, &thread);
 921
 922                 if(unlikely(!stcpu)) stcpu = rrdset_find("netdata.plugin_tc_cpu");
 923                 if(unlikely(!stcpu)) {
 924                     stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "tc.helper", NULL, "NetData TC CPU usage", "milliseconds/s", 135000, rrd_update_every, RRDSET_TYPE_STACKED);
 925                     rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
 926                     rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
 927                 }
 928                 else rrdset_next(stcpu);
 929
 930                 rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
 931                 rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
 932                 rrdset_done(stcpu);
 933
 934                 if(unlikely(!sttime)) stcpu = rrdset_find("netdata.plugin_tc_time");
 935                 if(unlikely(!sttime)) {
 936                     sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "tc.helper", NULL, "NetData TC script execution", "milliseconds/run", 135001, rrd_update_every, RRDSET_TYPE_AREA);
 937                     rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
 938                 }
 939                 else rrdset_next(sttime);
 940
 941                 rrddim_set(sttime, "run_time", atoll(words[1]));
 942                 rrdset_done(sttime);
 943
 944             }
 945 #ifdef DETACH_PLUGINS_FROM_NETDATA
 946             else if(unlikely(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0))) {
 947                 // debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
 948                 char *id = words[1];
 949                 pid_t pid = atol(id);
 950
 951                 if(likely(pid)) tc_child_pid = pid;
 952
 953                 debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
 954             }
 955 #endif
 956             //else {
 957             //  debug(D_TC_LOOP, "IGNORED line");
 958             //}
 959         }
 960
 961         // fgets() failed or loop broke
 962         int code = mypclose(fp, (pid_t)tc_child_pid);
 963         tc_child_pid = 0;
 964
 965         if(unlikely(device)) {
 966             // tc_device_free(device);
 967             device = NULL;
 968             class = NULL;
 969         }
 970
 971         if(unlikely(netdata_exit)) {
 972             tc_device_free_all();
 973             goto cleanup;
 974         }
 975
 976         if(code == 1 || code == 127) {
 977             // 1 = DISABLE
 978             // 127 = cannot even run it
 979             error("TC: tc-qos-helper.sh exited with code %d. Disabling it.", code);
 980
 981             tc_device_free_all();
 982             goto cleanup;
 983         }
 984
 985         sleep((unsigned int) rrd_update_every);
 986     }
 987
 988 cleanup:
 989     info("TC thread exiting");
 990
 991     static_thread->enabled = 0;
 992     pthread_exit(NULL);
 993     return NULL;
 994 }