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     if(likely(!d->enabled_all_classes_qdiscs)) {
 287         for(c = d->classes; c; c = c->next) {
 288             if(unlikely(!c->updated)) continue;
 289
 290             //debug(D_TC_LOOP, "TC: In device '%s', %s '%s'  has leafid: '%s' and parentid '%s'.",
 291             //    d->id,
 292             //    c->isqdisc?"qdisc":"class",
 293             //    c->id,
 294             //    c->leafid?c->leafid:"NULL",
 295             //    c->parentid?c->parentid:"NULL");
 296
 297             // find if c is leaf or not
 298             for(x = d->classes; x; x = x->next) {
 299                 if(unlikely(!x->updated || c == x || !x->parentid)) continue;
 300
 301                 // classes have both parentid and leafid
 302                 // qdiscs have only parentid
 303                 // the following works for both (it is an OR)
 304
 305                 if((c->hash == x->parent_hash && strcmp(c->id, x->parentid) == 0) ||
 306                    (c->leafid && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0)) {
 307                     // 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);
 308                     c->isleaf = 0;
 309                     x->hasparent = 1;
 310                 }
 311             }
 312         }
 313     }
 314
 315     for(c = d->classes ; c ; c = c->next) {
 316         if(unlikely(!c->updated)) continue;
 317
 318         // 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);
 319
 320         if(unlikely((c->isleaf && c->hasparent) || d->enabled_all_classes_qdiscs)) {
 321             c->render = 1;
 322             active_nodes++;
 323             bytes_sum += c->bytes;
 324             packets_sum += c->packets;
 325             dropped_sum += c->dropped;
 326             tokens_sum += c->tokens;
 327             ctokens_sum += c->ctokens;
 328         }
 329
 330         //if(unlikely(!c->hasparent)) {
 331         //    if(root) error("TC: multiple root class/qdisc for device '%s' (old: '%s', new: '%s')", d->id, root->id, c->id);
 332         //    root = c;
 333         //    debug(D_TC_LOOP, "TC: found root class/qdisc '%s'", root->id);
 334         //}
 335     }
 336
 337 #ifdef NETDATA_INTERNAL_CHECKS
 338     // dump all the list to see what we know
 339
 340     if(unlikely(debug_flags & D_TC_LOOP)) {
 341         for(c = d->classes ; c ; c = c->next) {
 342             if(c->render) debug(D_TC_LOOP, "TC: final nodes dump for '%s': class %s, OK", d->name, c->id);
 343             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)");
 344         }
 345     }
 346 #endif
 347
 348     if(unlikely(!active_nodes)) {
 349         debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No useful classes/qdiscs.", d->name?d->name:d->id);
 350         tc_device_classes_cleanup(d);
 351         return;
 352     }
 353
 354     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).",
 355         d->name?d->name:d->id,
 356         d->enabled, enable_new_interfaces,
 357         d->enabled_bytes, enable_bytes,
 358         d->enabled_packets, enable_packets,
 359         d->enabled_dropped, enable_dropped,
 360         d->enabled_tokens, enable_tokens,
 361         d->enabled_ctokens, enable_ctokens,
 362         d->enabled_all_classes_qdiscs, enabled_all_classes_qdiscs,
 363         bytes_sum,
 364         packets_sum,
 365         dropped_sum,
 366         tokens_sum,
 367         ctokens_sum
 368         );
 369
 370     // --------------------------------------------------------------------
 371     // bytes
 372
 373     if(d->enabled_bytes == CONFIG_ONDEMAND_YES || (d->enabled_bytes == CONFIG_ONDEMAND_ONDEMAND && bytes_sum)) {
 374         d->enabled_bytes = CONFIG_ONDEMAND_YES;
 375
 376         if(unlikely(!d->st_bytes))
 377             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);
 378
 379         else {
 380             rrdset_next(d->st_bytes);
 381             if(unlikely(d->name_updated)) rrdset_set_name(d->st_bytes, d->name);
 382
 383             // FIXME
 384             // update the family
 385         }
 386
 387         for(c = d->classes ; c ; c = c->next) {
 388             if(unlikely(!c->render)) continue;
 389
 390             if(unlikely(!c->rd_bytes))
 391                 c->rd_bytes = rrddim_add(d->st_bytes, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 392             else if(unlikely(c->name_updated))
 393                 rrddim_set_name(d->st_bytes, c->rd_bytes, c->name);
 394
 395             rrddim_set_by_pointer(d->st_bytes, c->rd_bytes, c->bytes);
 396         }
 397         rrdset_done(d->st_bytes);
 398     }
 399
 400     // --------------------------------------------------------------------
 401     // packets
 402
 403     if(d->enabled_packets == CONFIG_ONDEMAND_YES || (d->enabled_packets == CONFIG_ONDEMAND_ONDEMAND && packets_sum)) {
 404         d->enabled_packets = CONFIG_ONDEMAND_YES;
 405
 406         if(unlikely(!d->st_packets)) {
 407             char id[RRD_ID_LENGTH_MAX + 1];
 408             char name[RRD_ID_LENGTH_MAX + 1];
 409             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_packets", d->id);
 410             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
 411
 412             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);
 413         }
 414         else {
 415             rrdset_next(d->st_packets);
 416
 417             if(unlikely(d->name_updated)) {
 418                 char name[RRD_ID_LENGTH_MAX + 1];
 419                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
 420                 rrdset_set_name(d->st_packets, name);
 421             }
 422
 423             // FIXME
 424             // update the family
 425         }
 426
 427         for(c = d->classes ; c ; c = c->next) {
 428             if(unlikely(!c->render)) continue;
 429
 430             if(unlikely(!c->rd_packets))
 431                 c->rd_packets = rrddim_add(d->st_packets, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 432             else if(unlikely(c->name_updated))
 433                 rrddim_set_name(d->st_packets, c->rd_packets, c->name);
 434
 435             rrddim_set_by_pointer(d->st_packets, c->rd_packets, c->packets);
 436         }
 437         rrdset_done(d->st_packets);
 438     }
 439
 440     // --------------------------------------------------------------------
 441     // dropped
 442
 443     if(d->enabled_dropped == CONFIG_ONDEMAND_YES || (d->enabled_dropped == CONFIG_ONDEMAND_ONDEMAND && dropped_sum)) {
 444         d->enabled_dropped = CONFIG_ONDEMAND_YES;
 445
 446         if(unlikely(!d->st_dropped)) {
 447             char id[RRD_ID_LENGTH_MAX + 1];
 448             char name[RRD_ID_LENGTH_MAX + 1];
 449             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_dropped", d->id);
 450             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
 451
 452             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);
 453         }
 454         else {
 455             rrdset_next(d->st_dropped);
 456
 457             if(unlikely(d->name_updated)) {
 458                 char name[RRD_ID_LENGTH_MAX + 1];
 459                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
 460                 rrdset_set_name(d->st_dropped, name);
 461             }
 462
 463             // FIXME
 464             // update the family
 465         }
 466
 467         for(c = d->classes ; c ; c = c->next) {
 468             if(unlikely(!c->render)) continue;
 469
 470             if(unlikely(!c->rd_dropped))
 471                 c->rd_dropped = rrddim_add(d->st_dropped, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 472             else if(unlikely(c->name_updated))
 473                 rrddim_set_name(d->st_dropped, c->rd_dropped, c->name);
 474
 475             rrddim_set_by_pointer(d->st_dropped, c->rd_dropped, c->dropped);
 476         }
 477         rrdset_done(d->st_dropped);
 478     }
 479
 480     // --------------------------------------------------------------------
 481     // tokens
 482
 483     if(d->enabled_tokens == CONFIG_ONDEMAND_YES || (d->enabled_tokens == CONFIG_ONDEMAND_ONDEMAND && tokens_sum)) {
 484         d->enabled_tokens = CONFIG_ONDEMAND_YES;
 485
 486         if(unlikely(!d->st_tokens)) {
 487             char id[RRD_ID_LENGTH_MAX + 1];
 488             char name[RRD_ID_LENGTH_MAX + 1];
 489             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_tokens", d->id);
 490             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_tokens", d->name?d->name:d->id);
 491
 492             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);
 493         }
 494         else {
 495             rrdset_next(d->st_tokens);
 496
 497             if(unlikely(d->name_updated)) {
 498                 char name[RRD_ID_LENGTH_MAX + 1];
 499                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_tokens", d->name?d->name:d->id);
 500                 rrdset_set_name(d->st_tokens, name);
 501             }
 502
 503             // FIXME
 504             // update the family
 505         }
 506
 507         for(c = d->classes ; c ; c = c->next) {
 508             if(unlikely(!c->render)) continue;
 509
 510             if(unlikely(!c->rd_tokens)) {
 511                 c->rd_tokens = rrddim_add(d->st_tokens, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_ABSOLUTE);
 512             }
 513             else if(unlikely(c->name_updated))
 514                 rrddim_set_name(d->st_tokens, c->rd_tokens, c->name);
 515
 516             rrddim_set_by_pointer(d->st_tokens, c->rd_tokens, c->tokens);
 517         }
 518         rrdset_done(d->st_tokens);
 519     }
 520
 521     // --------------------------------------------------------------------
 522     // ctokens
 523
 524     if(d->enabled_ctokens == CONFIG_ONDEMAND_YES || (d->enabled_ctokens == CONFIG_ONDEMAND_ONDEMAND && ctokens_sum)) {
 525         d->enabled_ctokens = CONFIG_ONDEMAND_YES;
 526
 527         if(unlikely(!d->st_ctokens)) {
 528             char id[RRD_ID_LENGTH_MAX + 1];
 529             char name[RRD_ID_LENGTH_MAX + 1];
 530             snprintfz(id, RRD_ID_LENGTH_MAX, "%s_ctokens", d->id);
 531             snprintfz(name, RRD_ID_LENGTH_MAX, "%s_ctokens", d->name?d->name:d->id);
 532
 533             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);
 534         }
 535         else {
 536             debug(D_TC_LOOP, "TC: Updating _ctokens chart for device '%s'", d->name?d->name:d->id);
 537             rrdset_next(d->st_ctokens);
 538
 539             if(unlikely(d->name_updated)) {
 540                 char name[RRD_ID_LENGTH_MAX + 1];
 541                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_ctokens", d->name?d->name:d->id);
 542                 rrdset_set_name(d->st_ctokens, name);
 543             }
 544
 545             // FIXME
 546             // update the family
 547         }
 548
 549         for(c = d->classes ; c ; c = c->next) {
 550             if(unlikely(!c->render)) continue;
 551
 552             if(unlikely(!c->rd_ctokens))
 553                 c->rd_ctokens = rrddim_add(d->st_ctokens, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_ABSOLUTE);
 554             else if(unlikely(c->name_updated))
 555                 rrddim_set_name(d->st_ctokens, c->rd_ctokens, c->name);
 556
 557             rrddim_set_by_pointer(d->st_ctokens, c->rd_ctokens, c->ctokens);
 558         }
 559         rrdset_done(d->st_ctokens);
 560     }
 561
 562     tc_device_classes_cleanup(d);
 563 }
 564
 565 static inline void tc_device_set_class_name(struct tc_device *d, char *id, char *name) {
 566     if(unlikely(!name || !*name)) return;
 567
 568     struct tc_class *c = tc_class_index_find(d, id, 0);
 569     if(likely(c)) {
 570         if(likely(c->name)) {
 571             if(!strcmp(c->name, name)) return;
 572             freez(c->name);
 573             c->name = NULL;
 574         }
 575
 576         if(likely(name && *name && strcmp(c->id, name) != 0)) {
 577             debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
 578             c->name = strdupz(name);
 579             c->name_updated = 1;
 580         }
 581     }
 582 }
 583
 584 static inline void tc_device_set_device_name(struct tc_device *d, char *name) {
 585     if(unlikely(!name || !*name)) return;
 586
 587     if(d->name) {
 588         if(!strcmp(d->name, name)) return;
 589         freez(d->name);
 590         d->name = NULL;
 591     }
 592
 593     if(likely(name && *name && strcmp(d->id, name))) {
 594         debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
 595         d->name = strdupz(name);
 596         d->name_updated = 1;
 597     }
 598 }
 599
 600 static inline void tc_device_set_device_family(struct tc_device *d, char *family) {
 601     freez(d->family);
 602     d->family = NULL;
 603
 604     if(likely(family && *family && strcmp(d->id, family) != 0)) {
 605         debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
 606         d->family = strdupz(family);
 607         d->family_updated = 1;
 608     }
 609     // no need for null termination - it is already null
 610 }
 611
 612 static inline struct tc_device *tc_device_create(char *id)
 613 {
 614     struct tc_device *d = tc_device_index_find(id, 0);
 615
 616     if(!d) {
 617         debug(D_TC_LOOP, "TC: Creating device '%s'", id);
 618
 619         d = callocz(1, sizeof(struct tc_device));
 620
 621         d->id = strdupz(id);
 622         d->hash = simple_hash(d->id);
 623         d->enabled = (char)-1;
 624
 625         avl_init(&d->classes_index, tc_class_compare);
 626         if(unlikely(tc_device_index_add(d) != d))
 627             error("plugin_tc: INTERNAL ERROR: removing device '%s' removed a different device.", d->id);
 628
 629         if(!tc_device_root) {
 630             tc_device_root = d;
 631         }
 632         else {
 633             d->next = tc_device_root;
 634             tc_device_root->prev = d;
 635             tc_device_root = d;
 636         }
 637     }
 638
 639     return(d);
 640 }
 641
 642 static inline struct tc_class *tc_class_add(struct tc_device *n, char *id, char qdisc, char *parentid, char *leafid)
 643 {
 644     struct tc_class *c = tc_class_index_find(n, id, 0);
 645
 646     if(!c) {
 647         debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
 648
 649         c = callocz(1, sizeof(struct tc_class));
 650
 651         if(n->classes) n->classes->prev = c;
 652         c->next = n->classes;
 653         n->classes = c;
 654
 655         c->id = strdupz(id);
 656         c->hash = simple_hash(c->id);
 657
 658         c->isqdisc = qdisc;
 659         if(parentid && *parentid) {
 660             c->parentid = strdupz(parentid);
 661             c->parent_hash = simple_hash(c->parentid);
 662         }
 663
 664         if(leafid && *leafid) {
 665             c->leafid = strdupz(leafid);
 666             c->leaf_hash = simple_hash(c->leafid);
 667         }
 668
 669         if(unlikely(tc_class_index_add(n, c) != c))
 670             error("plugin_tc: INTERNAL ERROR: attempt index class '%s' on device '%s': already exists", c->id, n->id);
 671     }
 672     return(c);
 673 }
 674
 675 static inline void tc_device_free(struct tc_device *n)
 676 {
 677     if(n->next) n->next->prev = n->prev;
 678     if(n->prev) n->prev->next = n->next;
 679     if(tc_device_root == n) {
 680         if(n->next) tc_device_root = n->next;
 681         else tc_device_root = n->prev;
 682     }
 683
 684     if(unlikely(tc_device_index_del(n) != n))
 685         error("plugin_tc: INTERNAL ERROR: removing device '%s' removed a different device.", n->id);
 686
 687     while(n->classes) tc_class_free(n, n->classes);
 688
 689     freez(n->id);
 690     freez(n->name);
 691     freez(n->family);
 692     freez(n);
 693 }
 694
 695 static inline void tc_device_free_all()
 696 {
 697     while(tc_device_root)
 698         tc_device_free(tc_device_root);
 699 }
 700
 701 #define MAX_WORDS 20
 702
 703 static inline int tc_space(char c) {
 704     switch(c) {
 705     case ' ':
 706     case '\t':
 707     case '\r':
 708     case '\n':
 709         return 1;
 710
 711     default:
 712         return 0;
 713     }
 714 }
 715
 716 static inline void tc_split_words(char *str, char **words, int max_words) {
 717     char *s = str;
 718     int i = 0;
 719
 720     // skip all white space
 721     while(tc_space(*s)) s++;
 722
 723     // store the first word
 724     words[i++] = s;
 725
 726     // while we have something
 727     while(*s) {
 728         // if it is a space
 729         if(unlikely(tc_space(*s))) {
 730
 731             // terminate the word
 732             *s++ = '\0';
 733
 734             // skip all white space
 735             while(tc_space(*s)) s++;
 736
 737             // if we reached the end, stop
 738             if(!*s) break;
 739
 740             // store the next word
 741             if(i < max_words) words[i++] = s;
 742             else break;
 743         }
 744         else s++;
 745     }
 746
 747     // terminate the words
 748     while(i < max_words) words[i++] = NULL;
 749 }
 750
 751 volatile pid_t tc_child_pid = 0;
 752 void *tc_main(void *ptr) {
 753     struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
 754
 755     info("TC thread created with task id %d", gettid());
 756
 757     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 758         error("Cannot set pthread cancel type to DEFERRED.");
 759
 760     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 761         error("Cannot set pthread cancel state to ENABLE.");
 762
 763     struct rusage thread;
 764     RRDSET *stcpu = NULL, *sttime = NULL;
 765
 766     char buffer[TC_LINE_MAX+1] = "";
 767     char *words[MAX_WORDS] = { NULL };
 768
 769     uint32_t BEGIN_HASH = simple_hash("BEGIN");
 770     uint32_t END_HASH = simple_hash("END");
 771     uint32_t QDISC_HASH = simple_hash("qdisc");
 772     uint32_t CLASS_HASH = simple_hash("class");
 773     uint32_t SENT_HASH = simple_hash("Sent");
 774     uint32_t LENDED_HASH = simple_hash("lended:");
 775     uint32_t TOKENS_HASH = simple_hash("tokens:");
 776     uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
 777     uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
 778     uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
 779     uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
 780 #ifdef DETACH_PLUGINS_FROM_NETDATA
 781     uint32_t MYPID_HASH = simple_hash("MYPID");
 782 #endif
 783     uint32_t first_hash;
 784
 785     snprintfz(buffer, TC_LINE_MAX, "%s/tc-qos-helper.sh", netdata_configured_plugins_dir);
 786     char *tc_script = config_get("plugin:tc", "script to run to get tc values", buffer);
 787
 788     for(;1;) {
 789         if(unlikely(netdata_exit)) break;
 790
 791         FILE *fp;
 792         struct tc_device *device = NULL;
 793         struct tc_class *class = NULL;
 794
 795         snprintfz(buffer, TC_LINE_MAX, "exec %s %d", tc_script, rrd_update_every);
 796         debug(D_TC_LOOP, "executing '%s'", buffer);
 797
 798         fp = mypopen(buffer, (pid_t *)&tc_child_pid);
 799         if(unlikely(!fp)) {
 800             error("TC: Cannot popen(\"%s\", \"r\").", buffer);
 801             goto cleanup;
 802         }
 803
 804         while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
 805             if(unlikely(netdata_exit)) break;
 806
 807             buffer[TC_LINE_MAX] = '\0';
 808             // debug(D_TC_LOOP, "TC: read '%s'", buffer);
 809
 810             tc_split_words(buffer, words, MAX_WORDS);
 811
 812             if(unlikely(!words[0] || !*words[0])) {
 813                 // debug(D_TC_LOOP, "empty line");
 814                 continue;
 815             }
 816             // else debug(D_TC_LOOP, "First word is '%s'", words[0]);
 817
 818             first_hash = simple_hash(words[0]);
 819
 820             if(unlikely(device && ((first_hash == CLASS_HASH && strcmp(words[0], "class") == 0) ||  (first_hash == QDISC_HASH && strcmp(words[0], "qdisc") == 0)))) {
 821                 // 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]);
 822
 823                 char *type     = words[1];  // the class/qdisc type: htb, fq_codel, etc
 824                 char *id       = words[2];  // the class/qdisc major:minor
 825                 char *parent   = words[3];  // the word 'parent' or 'root'
 826                 char *parentid = words[4];  // parentid
 827                 char *leaf     = words[5];  // the word 'leaf'
 828                 char *leafid   = words[6];  // leafid
 829
 830                 int parent_is_root = 0;
 831                 int parent_is_parent = 0;
 832                 if(likely(parent)) {
 833                     parent_is_parent = !strcmp(parent, "parent");
 834
 835                     if(!parent_is_parent)
 836                         parent_is_root = !strcmp(parent, "root");
 837                 }
 838
 839                 if(likely(type && id && (parent_is_root || parent_is_parent))) {
 840                     char qdisc = 0;
 841
 842                     if(first_hash == QDISC_HASH) {
 843                         qdisc = 1;
 844
 845                         if(!strcmp(type, "ingress")) {
 846                             // we don't want to get the ingress qdisc
 847                             // there should be an IFB interface for this
 848
 849                             class = NULL;
 850                             continue;
 851                         }
 852
 853                         if(parent_is_parent && parentid) {
 854                             // eliminate the minor number from parentid
 855                             // why: parentid is the id of the parent class
 856                             // but major: is also the id of the parent qdisc
 857
 858                             char *s = parentid;
 859                             while(*s && *s != ':') s++;
 860                             if(*s == ':') s[1] = '\0';
 861                         }
 862                     }
 863
 864                     if(parent_is_root) {
 865                         parentid = NULL;
 866                         leafid = NULL;
 867                     }
 868                     else if(!leaf || strcmp(leaf, "leaf") != 0)
 869                         leafid = NULL;
 870
 871                     char leafbuf[20 + 1] = "";
 872                     if(leafid && leafid[strlen(leafid) - 1] == ':') {
 873                         strncpyz(leafbuf, leafid, 20 - 1);
 874                         strcat(leafbuf, "1");
 875                         leafid = leafbuf;
 876                     }
 877
 878                     class = tc_class_add(device, id, qdisc, parentid, leafid);
 879                 }
 880                 else {
 881                     // clear the last class
 882                     class = NULL;
 883                 }
 884             }
 885             else if(unlikely(first_hash == END_HASH && strcmp(words[0], "END") == 0)) {
 886                 // debug(D_TC_LOOP, "END line");
 887
 888                 if(likely(device)) {
 889                     if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 890                         error("Cannot set pthread cancel state to DISABLE.");
 891
 892                     tc_device_commit(device);
 893                     // tc_device_free(device);
 894
 895                     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 896                         error("Cannot set pthread cancel state to ENABLE.");
 897                 }
 898
 899                 device = NULL;
 900                 class = NULL;
 901             }
 902             else if(unlikely(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0)) {
 903                 // debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
 904
 905                 if(likely(words[1] && *words[1])) {
 906                     device = tc_device_create(words[1]);
 907                 }
 908                 else {
 909                     // tc_device_free(device);
 910                     device = NULL;
 911                 }
 912
 913                 class = NULL;
 914             }
 915             else if(unlikely(device && class && first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0)) {
 916                 // debug(D_TC_LOOP, "SENT line '%s'", words[1]);
 917                 if(likely(words[1] && *words[1])) {
 918                     class->bytes = str2ull(words[1]);
 919                     class->updated = 1;
 920                 }
 921                 else {
 922                     class->updated = 0;
 923                 }
 924
 925                 if(likely(words[3] && *words[3]))
 926                     class->packets = str2ull(words[3]);
 927
 928                 if(likely(words[6] && *words[6]))
 929                     class->dropped = str2ull(words[6]);
 930
 931                 if(likely(words[8] && *words[8]))
 932                     class->overlimits = str2ull(words[8]);
 933
 934                 if(likely(words[10] && *words[10]))
 935                     class->requeues = str2ull(words[8]);
 936             }
 937             else if(unlikely(device && class && class->updated && first_hash == LENDED_HASH && strcmp(words[0], "lended:") == 0)) {
 938                 // debug(D_TC_LOOP, "LENDED line '%s'", words[1]);
 939                 if(likely(words[1] && *words[1]))
 940                     class->lended = str2ull(words[1]);
 941
 942                 if(likely(words[3] && *words[3]))
 943                     class->borrowed = str2ull(words[3]);
 944
 945                 if(likely(words[5] && *words[5]))
 946                     class->giants = str2ull(words[5]);
 947             }
 948             else if(unlikely(device && class && class->updated && first_hash == TOKENS_HASH && strcmp(words[0], "tokens:") == 0)) {
 949                 // debug(D_TC_LOOP, "TOKENS line '%s'", words[1]);
 950                 if(likely(words[1] && *words[1]))
 951                     class->tokens = str2ull(words[1]);
 952
 953                 if(likely(words[3] && *words[3]))
 954                     class->ctokens = str2ull(words[3]);
 955             }
 956             else if(unlikely(device && first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0)) {
 957                 // debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
 958                 if(likely(words[1] && *words[1]))
 959                     tc_device_set_device_name(device, words[1]);
 960             }
 961             else if(unlikely(device && first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0)) {
 962                 // debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
 963                 if(likely(words[1] && *words[1]))
 964                     tc_device_set_device_family(device, words[1]);
 965             }
 966             else if(unlikely(device && first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0)) {
 967                 // debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
 968                 char *id    = words[1];
 969                 char *path  = words[2];
 970                 if(likely(id && *id && path && *path))
 971                     tc_device_set_class_name(device, id, path);
 972             }
 973             else if(unlikely(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0)) {
 974                 // debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
 975                 getrusage(RUSAGE_THREAD, &thread);
 976
 977                 if(unlikely(!stcpu)) stcpu = rrdset_find("netdata.plugin_tc_cpu");
 978                 if(unlikely(!stcpu)) {
 979                     stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "tc.helper", NULL, "NetData TC CPU usage", "milliseconds/s", 135000, rrd_update_every, RRDSET_TYPE_STACKED);
 980                     rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
 981                     rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
 982                 }
 983                 else rrdset_next(stcpu);
 984
 985                 rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
 986                 rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
 987                 rrdset_done(stcpu);
 988
 989                 if(unlikely(!sttime)) stcpu = rrdset_find("netdata.plugin_tc_time");
 990                 if(unlikely(!sttime)) {
 991                     sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "tc.helper", NULL, "NetData TC script execution", "milliseconds/run", 135001, rrd_update_every, RRDSET_TYPE_AREA);
 992                     rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
 993                 }
 994                 else rrdset_next(sttime);
 995
 996                 rrddim_set(sttime, "run_time", atoll(words[1]));
 997                 rrdset_done(sttime);
 998
 999             }
1000 #ifdef DETACH_PLUGINS_FROM_NETDATA
1001             else if(unlikely(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0))) {
1002                 // debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
1003                 char *id = words[1];
1004                 pid_t pid = atol(id);
1005
1006                 if(likely(pid)) tc_child_pid = pid;
1007
1008                 debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
1009             }
1010 #endif
1011             //else {
1012             //  debug(D_TC_LOOP, "IGNORED line");
1013             //}
1014         }
1015
1016         // fgets() failed or loop broke
1017         int code = mypclose(fp, (pid_t)tc_child_pid);
1018         tc_child_pid = 0;
1019
1020         if(unlikely(device)) {
1021             // tc_device_free(device);
1022             device = NULL;
1023             class = NULL;
1024         }
1025
1026         if(unlikely(netdata_exit)) {
1027             tc_device_free_all();
1028             goto cleanup;
1029         }
1030
1031         if(code == 1 || code == 127) {
1032             // 1 = DISABLE
1033             // 127 = cannot even run it
1034             error("TC: tc-qos-helper.sh exited with code %d. Disabling it.", code);
1035
1036             tc_device_free_all();
1037             goto cleanup;
1038         }
1039
1040         sleep((unsigned int) rrd_update_every);
1041     }
1042
1043 cleanup:
1044     info("TC thread exiting");
1045
1046     static_thread->enabled = 0;
1047     pthread_exit(NULL);
1048     return NULL;
1049 }