src/plugin_tc.c

   1 #include "common.h"
   2
   3 #define RRD_TYPE_TC                                     "tc"
   4 #define RRD_TYPE_TC_LEN                         strlen(RRD_TYPE_TC)
   5
   6 // ----------------------------------------------------------------------------
   7 // /sbin/tc processor
   8 // this requires the script plugins.d/tc-qos-helper.sh
   9
  10 #define TC_LINE_MAX 1024
  11
  12 struct tc_class {
  13         avl avl;
  14
  15         char *id;
  16         uint32_t hash;
  17
  18         char *name;
  19
  20         char *leafid;
  21         uint32_t leaf_hash;
  22
  23         char *parentid;
  24         uint32_t parent_hash;
  25
  26         char hasparent;
  27         char isleaf;
  28         unsigned long long bytes;
  29         unsigned long long packets;
  30         unsigned long long dropped;
  31         unsigned long long overlimits;
  32         unsigned long long requeues;
  33         unsigned long long lended;
  34         unsigned long long borrowed;
  35         unsigned long long giants;
  36         unsigned long long tokens;
  37         unsigned long long ctokens;
  38
  39         RRDDIM *rd_bytes;
  40         RRDDIM *rd_packets;
  41         RRDDIM *rd_dropped;
  42
  43         char name_updated;
  44         char updated;   // updated bytes
  45         int seen;               // seen in the tc list (even without bytes)
  46
  47         struct tc_class *next;
  48         struct tc_class *prev;
  49 };
  50
  51 struct tc_device {
  52         avl avl;
  53
  54         char *id;
  55         uint32_t hash;
  56
  57         char *name;
  58         char *family;
  59
  60         char name_updated;
  61         char family_updated;
  62
  63         char enabled;
  64         char enabled_bytes;
  65         char enabled_packets;
  66         char enabled_dropped;
  67
  68         RRDSET *st_bytes;
  69         RRDSET *st_packets;
  70         RRDSET *st_dropped;
  71
  72         avl_tree classes_index;
  73
  74         struct tc_class *classes;
  75
  76         struct tc_device *next;
  77         struct tc_device *prev;
  78 };
  79
  80
  81 struct tc_device *tc_device_root = NULL;
  82
  83 // ----------------------------------------------------------------------------
  84 // tc_device index
  85
  86 static int tc_device_compare(void* a, void* b) {
  87         if(((struct tc_device *)a)->hash < ((struct tc_device *)b)->hash) return -1;
  88         else if(((struct tc_device *)a)->hash > ((struct tc_device *)b)->hash) return 1;
  89         else return strcmp(((struct tc_device *)a)->id, ((struct tc_device *)b)->id);
  90 }
  91
  92 avl_tree tc_device_root_index = {
  93                 NULL,
  94                 tc_device_compare
  95 };
  96
  97 #define tc_device_index_add(st) avl_insert(&tc_device_root_index, (avl *)(st))
  98 #define tc_device_index_del(st) avl_remove(&tc_device_root_index, (avl *)(st))
  99
 100 static inline struct tc_device *tc_device_index_find(const char *id, uint32_t hash) {
 101         struct tc_device tmp;
 102         tmp.id = (char *)id;
 103         tmp.hash = (hash)?hash:simple_hash(tmp.id);
 104
 105         return (struct tc_device *)avl_search(&(tc_device_root_index), (avl *)&tmp);
 106 }
 107
 108
 109 // ----------------------------------------------------------------------------
 110 // tc_class index
 111
 112 static int tc_class_compare(void* a, void* b) {
 113         if(((struct tc_class *)a)->hash < ((struct tc_class *)b)->hash) return -1;
 114         else if(((struct tc_class *)a)->hash > ((struct tc_class *)b)->hash) return 1;
 115         else return strcmp(((struct tc_class *)a)->id, ((struct tc_class *)b)->id);
 116 }
 117
 118 #define tc_class_index_add(st, rd) avl_insert(&((st)->classes_index), (avl *)(rd))
 119 #define tc_class_index_del(st, rd) avl_remove(&((st)->classes_index), (avl *)(rd))
 120
 121 static inline struct tc_class *tc_class_index_find(struct tc_device *st, const char *id, uint32_t hash) {
 122         struct tc_class tmp;
 123         tmp.id = (char *)id;
 124         tmp.hash = (hash)?hash:simple_hash(tmp.id);
 125
 126         return (struct tc_class *)avl_search(&(st->classes_index), (avl *) &tmp);
 127 }
 128
 129 // ----------------------------------------------------------------------------
 130
 131 static inline void tc_class_free(struct tc_device *n, struct tc_class *c) {
 132         debug(D_TC_LOOP, "Removing from device '%s' class '%s', parentid '%s', leafid '%s', seen=%d", n->id, c->id, c->parentid?c->parentid:"", c->leafid?c->leafid:"", c->seen);
 133
 134         if(c->next) c->next->prev = c->prev;
 135         if(c->prev) c->prev->next = c->next;
 136         if(n->classes == c) {
 137                 if(c->next) n->classes = c->next;
 138                 else n->classes = c->prev;
 139         }
 140
 141         tc_class_index_del(n, c);
 142
 143         freez(c->id);
 144         freez(c->name);
 145         freez(c->leafid);
 146         freez(c->parentid);
 147         freez(c);
 148 }
 149
 150 static inline void tc_device_classes_cleanup(struct tc_device *d) {
 151         static int cleanup_every = 999;
 152
 153         if(unlikely(cleanup_every > 0)) {
 154                 cleanup_every = (int) config_get_number("plugin:tc", "cleanup unused classes every", 60);
 155                 if(cleanup_every < 0) cleanup_every = -cleanup_every;
 156         }
 157
 158         d->name_updated = 0;
 159         d->family_updated = 0;
 160
 161         struct tc_class *c = d->classes;
 162         while(c) {
 163                 if(unlikely(cleanup_every > 0 && c->seen >= cleanup_every)) {
 164                         struct tc_class *nc = c->next;
 165                         tc_class_free(d, c);
 166                         c = nc;
 167                 }
 168                 else {
 169                         c->updated = 0;
 170                         c->name_updated = 0;
 171
 172                         c = c->next;
 173                 }
 174         }
 175 }
 176
 177 static inline void tc_device_commit(struct tc_device *d) {
 178         static int enable_new_interfaces = -1, enable_bytes = -1, enable_packets = -1, enable_dropped = -1;
 179
 180         if(unlikely(enable_new_interfaces == -1)) {
 181                 enable_new_interfaces = config_get_boolean_ondemand("plugin:tc", "enable new interfaces detected at runtime", CONFIG_ONDEMAND_YES);
 182                 enable_bytes          = config_get_boolean_ondemand("plugin:tc", "enable traffic charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
 183                 enable_packets        = config_get_boolean_ondemand("plugin:tc", "enable packets charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
 184                 enable_dropped        = config_get_boolean_ondemand("plugin:tc", "enable dropped charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
 185         }
 186
 187         // we only need to add leaf classes
 188         struct tc_class *c, *x;
 189         unsigned long long bytes_sum = 0, packets_sum = 0, dropped_sum = 0;
 190         int active_classes = 0;
 191
 192         // set all classes
 193         for(c = d->classes ; c ; c = c->next) {
 194                 c->isleaf = 1;
 195                 c->hasparent = 0;
 196         }
 197
 198         // mark the classes as leafs and parents
 199         for(c = d->classes ; c ; c = c->next) {
 200                 if(unlikely(!c->updated)) continue;
 201
 202                 for(x = d->classes ; x ; x = x->next) {
 203                         if(unlikely(!x->updated)) continue;
 204
 205                         if(unlikely(c == x)) continue;
 206
 207                         if(x->parentid && (
 208                                 (               c->hash      == x->parent_hash && strcmp(c->id,     x->parentid) == 0) ||
 209                                 (c->leafid   && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0))) {
 210                                 // debug(D_TC_LOOP, "TC: In device '%s', class '%s' (leafid: '%s') has as leaf class '%s' (parentid: '%s').", d->name?d->name:d->id, c->name?c->name:c->id, c->leafid?c->leafid:c->id, x->name?x->name:x->id, x->parentid?x->parentid:x->id);
 211                                 c->isleaf = 0;
 212                                 x->hasparent = 1;
 213                         }
 214                 }
 215         }
 216
 217         // debugging:
 218         /*
 219         for ( c = d->classes ; c ; c = c->next) {
 220                 if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device %s, class %s, OK", d->name, c->id);
 221                 else debug(D_TC_LOOP, "TC: Device %s, class %s, IGNORE (isleaf: %d, hasparent: %d, parent: %s)", d->name, c->id, c->isleaf, c->hasparent, c->parentid);
 222         }
 223         */
 224
 225         // we need at least a class
 226         for(c = d->classes ; c ; c = c->next) {
 227                 // debug(D_TC_LOOP, "TC: Device '%s', class '%s', isLeaf=%d, HasParent=%d, Seen=%d", d->name?d->name:d->id, c->name?c->name:c->id, c->isleaf, c->hasparent, c->seen);
 228                 if(!c->updated) continue;
 229                 if(c->isleaf && c->hasparent) {
 230                         active_classes++;
 231                         bytes_sum += c->bytes;
 232                         packets_sum += c->packets;
 233                         dropped_sum += c->dropped;
 234                 }
 235         }
 236
 237         if(unlikely(!active_classes)) {
 238                 debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. No leaf classes.", d->name?d->name:d->id);
 239                 tc_device_classes_cleanup(d);
 240                 return;
 241         }
 242
 243         if(unlikely(d->enabled == -1)) {
 244                 char var_name[CONFIG_MAX_NAME + 1];
 245                 snprintfz(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
 246                 d->enabled         = config_get_boolean_ondemand("plugin:tc", var_name, enable_new_interfaces);
 247
 248                 snprintfz(var_name, CONFIG_MAX_NAME, "traffic chart for %s", d->id);
 249                 d->enabled_bytes   = config_get_boolean_ondemand("plugin:tc", var_name, enable_bytes);
 250
 251                 snprintfz(var_name, CONFIG_MAX_NAME, "packets chart for %s", d->id);
 252                 d->enabled_packets = config_get_boolean_ondemand("plugin:tc", var_name, enable_packets);
 253
 254                 snprintfz(var_name, CONFIG_MAX_NAME, "dropped packets chart for %s", d->id);
 255                 d->enabled_dropped = config_get_boolean_ondemand("plugin:tc", var_name, enable_dropped);
 256         }
 257
 258         if(likely(d->enabled)) {
 259                 // --------------------------------------------------------------------
 260                 // bytes
 261
 262                 if(d->enabled_bytes == CONFIG_ONDEMAND_YES || (d->enabled_bytes == CONFIG_ONDEMAND_ONDEMAND && bytes_sum)) {
 263                         d->enabled_bytes = CONFIG_ONDEMAND_YES;
 264
 265                         if(unlikely(!d->st_bytes)) {
 266                                 d->st_bytes = rrdset_find_bytype(RRD_TYPE_TC, d->id);
 267                                 if(unlikely(!d->st_bytes)) {
 268                                         debug(D_TC_LOOP, "TC: Creating new chart for device '%s'", d->name?d->name:d->id);
 269                                         d->st_bytes = rrdset_create(RRD_TYPE_TC, d->id, d->name?d->name:d->id, d->family?d->family:d->id, RRD_TYPE_TC ".qos", "Class Usage", "kilobits/s", 7000, rrd_update_every, RRDSET_TYPE_STACKED);
 270                                 }
 271                         }
 272                         else {
 273                                 debug(D_TC_LOOP, "TC: Updating chart for device '%s'", d->name?d->name:d->id);
 274                                 rrdset_next_plugins(d->st_bytes);
 275
 276                                 if(unlikely(d->name_updated && d->name && strcmp(d->id, d->name) != 0)) {
 277                                         rrdset_set_name(d->st_bytes, d->name);
 278                                         d->name_updated = 0;
 279                                 }
 280
 281                                 // FIXME
 282                                 // update the family
 283                         }
 284
 285                         for(c = d->classes ; c ; c = c->next) {
 286                                 if(unlikely(!c->updated)) continue;
 287
 288                                 if(c->isleaf && c->hasparent) {
 289                                         c->seen++;
 290
 291                                         if(unlikely(!c->rd_bytes)) {
 292                                                 c->rd_bytes = rrddim_find(d->st_bytes, c->id);
 293                                                 if(unlikely(!c->rd_bytes)) {
 294                                                         debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s' (name: '%s')", d->st_bytes->id, c->id, c->name);
 295
 296                                                         // new class, we have to add it
 297                                                         c->rd_bytes = rrddim_add(d->st_bytes, c->id, c->name?c->name:c->id, 8, 1024, RRDDIM_INCREMENTAL);
 298                                                 }
 299                                                 else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", d->st_bytes->id, c->id);
 300                                         }
 301
 302                                         rrddim_set_by_pointer(d->st_bytes, c->rd_bytes, c->bytes);
 303
 304                                         // if it has a name, different to the id
 305                                         if(unlikely(c->name_updated && c->name && strcmp(c->id, c->name) != 0)) {
 306                                                 // update the rrd dimension with the new name
 307                                                 debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", d->st_bytes->id, c->rd_bytes->id, c->name);
 308                                                 rrddim_set_name(d->st_bytes, c->rd_bytes, c->name);
 309                                         }
 310                                 }
 311                         }
 312                         rrdset_done(d->st_bytes);
 313                 }
 314
 315                 // --------------------------------------------------------------------
 316                 // packets
 317
 318                 if(d->enabled_packets == CONFIG_ONDEMAND_YES || (d->enabled_packets == CONFIG_ONDEMAND_ONDEMAND && packets_sum)) {
 319                         d->enabled_packets = CONFIG_ONDEMAND_YES;
 320
 321                         if(unlikely(!d->st_packets)) {
 322                                 char id[RRD_ID_LENGTH_MAX + 1];
 323                                 char name[RRD_ID_LENGTH_MAX + 1];
 324                                 snprintfz(id, RRD_ID_LENGTH_MAX, "%s_packets", d->id);
 325                                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_packets", d->name?d->name:d->id);
 326
 327                                 d->st_packets = rrdset_find_bytype(RRD_TYPE_TC, id);
 328                                 if(unlikely(!d->st_packets)) {
 329                                         debug(D_TC_LOOP, "TC: Creating new _packets chart for device '%s'", d->name?d->name:d->id);
 330                                         d->st_packets = rrdset_create(RRD_TYPE_TC, id, name, d->family?d->family:d->id, RRD_TYPE_TC ".qos_packets", "Class Packets", "packets/s", 7010, rrd_update_every, RRDSET_TYPE_STACKED);
 331                                 }
 332                         }
 333                         else {
 334                                 debug(D_TC_LOOP, "TC: Updating _packets chart for device '%s'", d->name?d->name:d->id);
 335                                 rrdset_next_plugins(d->st_packets);
 336
 337                                 // FIXME
 338                                 // update the family
 339                         }
 340
 341                         for(c = d->classes ; c ; c = c->next) {
 342                                 if(unlikely(!c->updated)) continue;
 343
 344                                 if(c->isleaf && c->hasparent) {
 345                                         if(unlikely(!c->rd_packets)) {
 346                                                 c->rd_packets = rrddim_find(d->st_packets, c->id);
 347                                                 if(unlikely(!c->rd_packets)) {
 348                                                         debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s' (name: '%s')", d->st_packets->id, c->id, c->name);
 349
 350                                                         // new class, we have to add it
 351                                                         c->rd_packets = rrddim_add(d->st_packets, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 352                                                 }
 353                                                 else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", d->st_packets->id, c->id);
 354                                         }
 355
 356                                         rrddim_set_by_pointer(d->st_packets, c->rd_packets, c->packets);
 357
 358                                         // if it has a name, different to the id
 359                                         if(unlikely(c->name_updated && c->name && strcmp(c->id, c->name) != 0)) {
 360                                                 // update the rrd dimension with the new name
 361                                                 debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", d->st_packets->id, c->rd_packets->id, c->name);
 362                                                 rrddim_set_name(d->st_packets, c->rd_packets, c->name);
 363                                         }
 364                                 }
 365                         }
 366                         rrdset_done(d->st_packets);
 367                 }
 368
 369                 // --------------------------------------------------------------------
 370                 // dropped
 371
 372                 if(d->enabled_dropped == CONFIG_ONDEMAND_YES || (d->enabled_dropped == CONFIG_ONDEMAND_ONDEMAND && dropped_sum)) {
 373                         d->enabled_dropped = CONFIG_ONDEMAND_YES;
 374
 375                         if(unlikely(!d->st_dropped)) {
 376                                 char id[RRD_ID_LENGTH_MAX + 1];
 377                                 char name[RRD_ID_LENGTH_MAX + 1];
 378                                 snprintfz(id, RRD_ID_LENGTH_MAX, "%s_dropped", d->id);
 379                                 snprintfz(name, RRD_ID_LENGTH_MAX, "%s_dropped", d->name?d->name:d->id);
 380
 381                                 d->st_dropped = rrdset_find_bytype(RRD_TYPE_TC, id);
 382                                 if(unlikely(!d->st_dropped)) {
 383                                         debug(D_TC_LOOP, "TC: Creating new _dropped chart for device '%s'", d->name?d->name:d->id);
 384                                         d->st_dropped = rrdset_create(RRD_TYPE_TC, id, name, d->family?d->family:d->id, RRD_TYPE_TC ".qos_dropped", "Class Dropped Packets", "packets/s", 7020, rrd_update_every, RRDSET_TYPE_STACKED);
 385                                 }
 386                         }
 387                         else {
 388                                 debug(D_TC_LOOP, "TC: Updating _dropped chart for device '%s'", d->name?d->name:d->id);
 389                                 rrdset_next_plugins(d->st_dropped);
 390
 391                                 // FIXME
 392                                 // update the family
 393                         }
 394
 395                         for(c = d->classes ; c ; c = c->next) {
 396                                 if(unlikely(!c->updated)) continue;
 397
 398                                 if(c->isleaf && c->hasparent) {
 399                                         if(unlikely(!c->rd_dropped)) {
 400                                                 c->rd_dropped = rrddim_find(d->st_dropped, c->id);
 401                                                 if(unlikely(!c->rd_dropped)) {
 402                                                         debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s' (name: '%s')", d->st_dropped->id, c->id, c->name);
 403
 404                                                         // new class, we have to add it
 405                                                         c->rd_dropped = rrddim_add(d->st_dropped, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_INCREMENTAL);
 406                                                 }
 407                                                 else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", d->st_dropped->id, c->id);
 408                                         }
 409
 410                                         rrddim_set_by_pointer(d->st_dropped, c->rd_dropped, c->dropped);
 411
 412                                         // if it has a name, different to the id
 413                                         if(unlikely(c->name_updated && c->name && strcmp(c->id, c->name) != 0)) {
 414                                                 // update the rrd dimension with the new name
 415                                                 debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", d->st_dropped->id, c->rd_dropped->id, c->name);
 416                                                 rrddim_set_name(d->st_dropped, c->rd_dropped, c->name);
 417                                         }
 418                                 }
 419                         }
 420                         rrdset_done(d->st_dropped);
 421                 }
 422         }
 423
 424         tc_device_classes_cleanup(d);
 425 }
 426
 427 static inline void tc_device_set_class_name(struct tc_device *d, char *id, char *name)
 428 {
 429         struct tc_class *c = tc_class_index_find(d, id, 0);
 430         if(likely(c)) {
 431                 freez(c->name);
 432                 c->name = NULL;
 433
 434                 if(likely(name && *name && strcmp(c->id, name) != 0)) {
 435                         debug(D_TC_LOOP, "TC: Setting device '%s', class '%s' name to '%s'", d->id, id, name);
 436                         c->name = strdupz(name);
 437                         c->name_updated = 1;
 438                 }
 439         }
 440 }
 441
 442 static inline void tc_device_set_device_name(struct tc_device *d, char *name) {
 443         freez(d->name);
 444         d->name = NULL;
 445
 446         if(likely(name && *name && strcmp(d->id, name) != 0)) {
 447                 debug(D_TC_LOOP, "TC: Setting device '%s' name to '%s'", d->id, name);
 448                 d->name = strdupz(name);
 449                 d->name_updated = 1;
 450         }
 451 }
 452
 453 static inline void tc_device_set_device_family(struct tc_device *d, char *family) {
 454         freez(d->family);
 455         d->family = NULL;
 456
 457         if(likely(family && *family && strcmp(d->id, family) != 0)) {
 458                 debug(D_TC_LOOP, "TC: Setting device '%s' family to '%s'", d->id, family);
 459                 d->family = strdupz(family);
 460                 d->family_updated = 1;
 461         }
 462         // no need for null termination - it is already null
 463 }
 464
 465 static inline struct tc_device *tc_device_create(char *id)
 466 {
 467         struct tc_device *d = tc_device_index_find(id, 0);
 468
 469         if(!d) {
 470                 debug(D_TC_LOOP, "TC: Creating device '%s'", id);
 471
 472                 d = callocz(1, sizeof(struct tc_device));
 473
 474                 d->id = strdupz(id);
 475                 d->hash = simple_hash(d->id);
 476                 d->enabled = -1;
 477
 478                 avl_init(&d->classes_index, tc_class_compare);
 479                 tc_device_index_add(d);
 480
 481                 if(!tc_device_root) {
 482                         tc_device_root = d;
 483                 }
 484                 else {
 485                         d->next = tc_device_root;
 486                         tc_device_root->prev = d;
 487                         tc_device_root = d;
 488                 }
 489         }
 490
 491         return(d);
 492 }
 493
 494 static inline struct tc_class *tc_class_add(struct tc_device *n, char *id, char *parentid, char *leafid)
 495 {
 496         struct tc_class *c = tc_class_index_find(n, id, 0);
 497
 498         if(!c) {
 499                 debug(D_TC_LOOP, "TC: Creating in device '%s', class id '%s', parentid '%s', leafid '%s'", n->id, id, parentid?parentid:"", leafid?leafid:"");
 500
 501                 c = callocz(1, sizeof(struct tc_class));
 502
 503                 if(n->classes) n->classes->prev = c;
 504                 c->next = n->classes;
 505                 n->classes = c;
 506
 507                 c->id = strdupz(id);
 508                 c->hash = simple_hash(c->id);
 509
 510                 if(parentid && *parentid) {
 511                         c->parentid = strdupz(parentid);
 512                         c->parent_hash = simple_hash(c->parentid);
 513                 }
 514
 515                 if(leafid && *leafid) {
 516                         c->leafid = strdupz(leafid);
 517                         c->leaf_hash = simple_hash(c->leafid);
 518                 }
 519
 520                 tc_class_index_add(n, c);
 521         }
 522
 523         c->seen = 1;
 524
 525         return(c);
 526 }
 527
 528 static inline void tc_device_free(struct tc_device *n)
 529 {
 530         if(n->next) n->next->prev = n->prev;
 531         if(n->prev) n->prev->next = n->next;
 532         if(tc_device_root == n) {
 533                 if(n->next) tc_device_root = n->next;
 534                 else tc_device_root = n->prev;
 535         }
 536
 537         tc_device_index_del(n);
 538
 539         while(n->classes) tc_class_free(n, n->classes);
 540
 541         freez(n->id);
 542         freez(n->name);
 543         freez(n->family);
 544         freez(n);
 545 }
 546
 547 static inline void tc_device_free_all()
 548 {
 549         while(tc_device_root)
 550                 tc_device_free(tc_device_root);
 551 }
 552
 553 #define MAX_WORDS 20
 554
 555 static inline int tc_space(char c) {
 556         switch(c) {
 557         case ' ':
 558         case '\t':
 559         case '\r':
 560         case '\n':
 561                 return 1;
 562
 563         default:
 564                 return 0;
 565         }
 566 }
 567
 568 static inline void tc_split_words(char *str, char **words, int max_words) {
 569         char *s = str;
 570         int i = 0;
 571
 572         // skip all white space
 573         while(tc_space(*s)) s++;
 574
 575         // store the first word
 576         words[i++] = s;
 577
 578         // while we have something
 579         while(*s) {
 580                 // if it is a space
 581                 if(unlikely(tc_space(*s))) {
 582
 583                         // terminate the word
 584                         *s++ = '\0';
 585
 586                         // skip all white space
 587                         while(tc_space(*s)) s++;
 588
 589                         // if we reached the end, stop
 590                         if(!*s) break;
 591
 592                         // store the next word
 593                         if(i < max_words) words[i++] = s;
 594                         else break;
 595                 }
 596                 else s++;
 597         }
 598
 599         // terminate the words
 600         while(i < max_words) words[i++] = NULL;
 601 }
 602
 603 pid_t tc_child_pid = 0;
 604 void *tc_main(void *ptr) {
 605         (void)ptr;
 606
 607         info("TC thread created with task id %d", gettid());
 608
 609         if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
 610                 error("Cannot set pthread cancel type to DEFERRED.");
 611
 612         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 613                 error("Cannot set pthread cancel state to ENABLE.");
 614
 615         struct rusage thread;
 616         RRDSET *stcpu = NULL, *sttime = NULL;
 617
 618         char buffer[TC_LINE_MAX+1] = "";
 619         char *words[MAX_WORDS] = { NULL };
 620
 621         uint32_t BEGIN_HASH = simple_hash("BEGIN");
 622         uint32_t END_HASH = simple_hash("END");
 623         uint32_t CLASS_HASH = simple_hash("class");
 624         uint32_t SENT_HASH = simple_hash("Sent");
 625         uint32_t LENDED_HASH = simple_hash("lended:");
 626         uint32_t TOKENS_HASH = simple_hash("tokens:");
 627         uint32_t SETDEVICENAME_HASH = simple_hash("SETDEVICENAME");
 628         uint32_t SETDEVICEGROUP_HASH = simple_hash("SETDEVICEGROUP");
 629         uint32_t SETCLASSNAME_HASH = simple_hash("SETCLASSNAME");
 630         uint32_t WORKTIME_HASH = simple_hash("WORKTIME");
 631 #ifdef DETACH_PLUGINS_FROM_NETDATA
 632         uint32_t MYPID_HASH = simple_hash("MYPID");
 633 #endif
 634         uint32_t first_hash;
 635
 636         snprintfz(buffer, TC_LINE_MAX, "%s/tc-qos-helper.sh", config_get("plugins", "plugins directory", PLUGINS_DIR));
 637         char *tc_script = config_get("plugin:tc", "script to run to get tc values", buffer);
 638
 639         for(;1;) {
 640                 if(unlikely(netdata_exit)) break;
 641
 642                 FILE *fp;
 643                 struct tc_device *device = NULL;
 644                 struct tc_class *class = NULL;
 645
 646                 snprintfz(buffer, TC_LINE_MAX, "exec %s %d", tc_script, rrd_update_every);
 647                 debug(D_TC_LOOP, "executing '%s'", buffer);
 648
 649                 fp = mypopen(buffer, &tc_child_pid);
 650                 if(unlikely(!fp)) {
 651                         error("TC: Cannot popen(\"%s\", \"r\").", buffer);
 652                         pthread_exit(NULL);
 653                         return NULL;
 654                 }
 655
 656                 while(fgets(buffer, TC_LINE_MAX, fp) != NULL) {
 657                         if(unlikely(netdata_exit)) break;
 658
 659                         buffer[TC_LINE_MAX] = '\0';
 660                         // debug(D_TC_LOOP, "TC: read '%s'", buffer);
 661
 662                         tc_split_words(buffer, words, MAX_WORDS);
 663
 664                         if(unlikely(!words[0] || !*words[0])) {
 665                                 // debug(D_TC_LOOP, "empty line");
 666                                 continue;
 667                         }
 668                         // else debug(D_TC_LOOP, "First word is '%s'", words[0]);
 669
 670                         first_hash = simple_hash(words[0]);
 671
 672                         if(unlikely(device && first_hash == CLASS_HASH && strcmp(words[0], "class") == 0)) {
 673                                 // debug(D_TC_LOOP, "CLASS line on class id='%s', parent='%s', parentid='%s', leaf='%s', leafid='%s'", words[2], words[3], words[4], words[5], words[6]);
 674
 675                                 // words[1] : class type
 676                                 // words[2] : N:XX
 677                                 // words[3] : parent or root
 678                                 if(likely(words[1] && words[2] && words[3] && (strcmp(words[3], "parent") == 0 || strcmp(words[3], "root") == 0))) {
 679                                         //char *type     = words[1];  // the class: htb, fq_codel, etc
 680
 681                                         // we are only interested for HTB classes
 682                                         //if(strcmp(type, "htb") != 0) continue;
 683
 684                                         char *id       = words[2];      // the class major:minor
 685                                         char *parent   = words[3];      // 'parent' or 'root'
 686                                         char *parentid = words[4];      // the parent's id
 687                                         char *leaf     = words[5];      // 'leaf'
 688                                         char *leafid   = words[6];      // leafid
 689
 690                                         if(strcmp(parent, "root") == 0) {
 691                                                 parentid = NULL;
 692                                                 leafid = NULL;
 693                                         }
 694                                         else if(!leaf || strcmp(leaf, "leaf") != 0)
 695                                                 leafid = NULL;
 696
 697                                         char leafbuf[20 + 1] = "";
 698                                         if(leafid && leafid[strlen(leafid) - 1] == ':') {
 699                                                 strncpyz(leafbuf, leafid, 20 - 1);
 700                                                 strcat(leafbuf, "1");
 701                                                 leafid = leafbuf;
 702                                         }
 703
 704                                         class = tc_class_add(device, id, parentid, leafid);
 705                                 }
 706                                 else {
 707                                         // clear the last class
 708                                         class = NULL;
 709                                 }
 710                         }
 711                         else if(unlikely(first_hash == END_HASH && strcmp(words[0], "END") == 0)) {
 712                                 // debug(D_TC_LOOP, "END line");
 713
 714                                 if(likely(device)) {
 715                                         if(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
 716                                                 error("Cannot set pthread cancel state to DISABLE.");
 717
 718                                         tc_device_commit(device);
 719                                         // tc_device_free(device);
 720
 721                                         if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
 722                                                 error("Cannot set pthread cancel state to ENABLE.");
 723                                 }
 724
 725                                 device = NULL;
 726                                 class = NULL;
 727                         }
 728                         else if(unlikely(first_hash == BEGIN_HASH && strcmp(words[0], "BEGIN") == 0)) {
 729                                 // debug(D_TC_LOOP, "BEGIN line on device '%s'", words[1]);
 730
 731                                 if(likely(words[1] && *words[1])) {
 732                                         device = tc_device_create(words[1]);
 733                                 }
 734                                 else {
 735                                         // tc_device_free(device);
 736                                         device = NULL;
 737                                 }
 738
 739                                 class = NULL;
 740                         }
 741                         else if(unlikely(device && class && first_hash == SENT_HASH && strcmp(words[0], "Sent") == 0)) {
 742                                 // debug(D_TC_LOOP, "SENT line '%s'", words[1]);
 743                                 if(likely(words[1] && *words[1])) {
 744                                         class->bytes = strtoull(words[1], NULL, 10);
 745                                         class->updated = 1;
 746                                 }
 747                                 else {
 748                                         class->updated = 0;
 749                                 }
 750
 751                                 if(likely(words[3] && *words[3]))
 752                                         class->packets = strtoull(words[3], NULL, 10);
 753
 754                                 if(likely(words[6] && *words[6]))
 755                                         class->dropped = strtoull(words[6], NULL, 10);
 756
 757                                 if(likely(words[8] && *words[8]))
 758                                         class->overlimits = strtoull(words[8], NULL, 10);
 759
 760                                 if(likely(words[10] && *words[10]))
 761                                         class->requeues = strtoull(words[8], NULL, 10);
 762                         }
 763                         else if(unlikely(device && class && class->updated && first_hash == LENDED_HASH && strcmp(words[0], "lended:") == 0)) {
 764                                 // debug(D_TC_LOOP, "LENDED line '%s'", words[1]);
 765                                 if(likely(words[1] && *words[1]))
 766                                         class->lended = strtoull(words[1], NULL, 10);
 767
 768                                 if(likely(words[3] && *words[3]))
 769                                         class->borrowed = strtoull(words[3], NULL, 10);
 770
 771                                 if(likely(words[5] && *words[5]))
 772                                         class->giants = strtoull(words[5], NULL, 10);
 773                         }
 774                         else if(unlikely(device && class && class->updated && first_hash == TOKENS_HASH && strcmp(words[0], "tokens:") == 0)) {
 775                                 // debug(D_TC_LOOP, "TOKENS line '%s'", words[1]);
 776                                 if(likely(words[1] && *words[1]))
 777                                         class->tokens = strtoull(words[1], NULL, 10);
 778
 779                                 if(likely(words[3] && *words[3]))
 780                                         class->ctokens = strtoull(words[3], NULL, 10);
 781                         }
 782                         else if(unlikely(device && first_hash == SETDEVICENAME_HASH && strcmp(words[0], "SETDEVICENAME") == 0)) {
 783                                 // debug(D_TC_LOOP, "SETDEVICENAME line '%s'", words[1]);
 784                                 if(likely(words[1] && *words[1]))
 785                                         tc_device_set_device_name(device, words[1]);
 786                         }
 787                         else if(unlikely(device && first_hash == SETDEVICEGROUP_HASH && strcmp(words[0], "SETDEVICEGROUP") == 0)) {
 788                                 // debug(D_TC_LOOP, "SETDEVICEGROUP line '%s'", words[1]);
 789                                 if(likely(words[1] && *words[1]))
 790                                         tc_device_set_device_family(device, words[1]);
 791                         }
 792                         else if(unlikely(device && first_hash == SETCLASSNAME_HASH && strcmp(words[0], "SETCLASSNAME") == 0)) {
 793                                 // debug(D_TC_LOOP, "SETCLASSNAME line '%s' '%s'", words[1], words[2]);
 794                                 char *id    = words[1];
 795                                 char *path  = words[2];
 796                                 if(likely(id && *id && path && *path))
 797                                         tc_device_set_class_name(device, id, path);
 798                         }
 799                         else if(unlikely(first_hash == WORKTIME_HASH && strcmp(words[0], "WORKTIME") == 0)) {
 800                                 // debug(D_TC_LOOP, "WORKTIME line '%s' '%s'", words[1], words[2]);
 801                                 getrusage(RUSAGE_THREAD, &thread);
 802
 803                                 if(unlikely(!stcpu)) stcpu = rrdset_find("netdata.plugin_tc_cpu");
 804                                 if(unlikely(!stcpu)) {
 805                                         stcpu = rrdset_create("netdata", "plugin_tc_cpu", NULL, "tc.helper", NULL, "NetData TC CPU usage", "milliseconds/s", 135000, rrd_update_every, RRDSET_TYPE_STACKED);
 806                                         rrddim_add(stcpu, "user",  NULL,  1, 1000, RRDDIM_INCREMENTAL);
 807                                         rrddim_add(stcpu, "system", NULL, 1, 1000, RRDDIM_INCREMENTAL);
 808                                 }
 809                                 else rrdset_next(stcpu);
 810
 811                                 rrddim_set(stcpu, "user"  , thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
 812                                 rrddim_set(stcpu, "system", thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
 813                                 rrdset_done(stcpu);
 814
 815                                 if(unlikely(!sttime)) stcpu = rrdset_find("netdata.plugin_tc_time");
 816                                 if(unlikely(!sttime)) {
 817                                         sttime = rrdset_create("netdata", "plugin_tc_time", NULL, "tc.helper", NULL, "NetData TC script execution", "milliseconds/run", 135001, rrd_update_every, RRDSET_TYPE_AREA);
 818                                         rrddim_add(sttime, "run_time",  "run time",  1, 1, RRDDIM_ABSOLUTE);
 819                                 }
 820                                 else rrdset_next(sttime);
 821
 822                                 rrddim_set(sttime, "run_time", atoll(words[1]));
 823                                 rrdset_done(sttime);
 824
 825                         }
 826 #ifdef DETACH_PLUGINS_FROM_NETDATA
 827                         else if(unlikely(first_hash == MYPID_HASH && (strcmp(words[0], "MYPID") == 0))) {
 828                                 // debug(D_TC_LOOP, "MYPID line '%s'", words[1]);
 829                                 char *id = words[1];
 830                                 pid_t pid = atol(id);
 831
 832                                 if(likely(pid)) tc_child_pid = pid;
 833
 834                                 debug(D_TC_LOOP, "TC: Child PID is %d.", tc_child_pid);
 835                         }
 836 #endif
 837                         //else {
 838                         //      debug(D_TC_LOOP, "IGNORED line");
 839                         //}
 840                 }
 841
 842                 // fgets() failed or loop broke
 843                 int code = mypclose(fp, tc_child_pid);
 844                 tc_child_pid = 0;
 845
 846                 if(unlikely(device)) {
 847                         // tc_device_free(device);
 848                         device = NULL;
 849                         class = NULL;
 850                 }
 851
 852                 if(unlikely(netdata_exit)) {
 853                         tc_device_free_all();
 854                         pthread_exit(NULL);
 855                         return NULL;
 856                 }
 857
 858                 if(code == 1 || code == 127) {
 859                         // 1 = DISABLE
 860                         // 127 = cannot even run it
 861                         error("TC: tc-qos-helper.sh exited with code %d. Disabling it.", code);
 862
 863                         tc_device_free_all();
 864                         pthread_exit(NULL);
 865                         return NULL;
 866                 }
 867
 868                 sleep((unsigned int) rrd_update_every);
 869         }
 870
 871         pthread_exit(NULL);
 872         return NULL;
 873 }