- // debugging:
- /*
- for ( c = d->classes ; c ; c = c->next) {
- if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device %s, class %s, OK", d->name, c->id);
- 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);
+ if(unlikely(!d->enabled || (!updated_classes && !updated_qdiscs))) {
+ debug(D_TC_LOOP, "TC: Ignoring TC device '%s'. It is not enabled/updated.", d->name?d->name:d->id);
+ tc_device_classes_cleanup(d);
+ return;
+ }
+
+ if(unlikely(updated_classes && updated_qdiscs)) {
+ error("TC: device '%s' has active both classes (%d) and qdiscs (%d). Will render only qdiscs.", d->id, updated_classes, updated_qdiscs);
+
+ // set all classes to !updated
+ for(c = d->classes ; c ; c = c->next)
+ if(unlikely(!c->isqdisc && c->updated))
+ c->updated = 0;
+
+ updated_classes = 0;
+ }
+
+ // mark the classes as leafs and parents
+ //
+ // TC is hierarchical:
+ // - classes can have other classes in them
+ // - the same is true for qdiscs (i.e. qdiscs have classes, that have other qdiscs)
+ //
+ // we need to present a chart with leaf nodes only, so that the sum
+ // of all dimensions of the chart, will be the total utilization
+ // of the interface.
+ //
+ // here we try to find the ones we need to report
+ // by default all nodes are marked with: isleaf = 1 (see above)
+ //
+ // so, here we remove the isleaf flag from nodes in the middle
+ // and we add the hasparent flag to leaf nodes we found their parent
+ if(likely(!d->enabled_all_classes_qdiscs)) {
+ for(c = d->classes; c; c = c->next) {
+ if(unlikely(!c->updated)) continue;
+
+ //debug(D_TC_LOOP, "TC: In device '%s', %s '%s' has leafid: '%s' and parentid '%s'.",
+ // d->id,
+ // c->isqdisc?"qdisc":"class",
+ // c->id,
+ // c->leafid?c->leafid:"NULL",
+ // c->parentid?c->parentid:"NULL");
+
+ // find if c is leaf or not
+ for(x = d->classes; x; x = x->next) {
+ if(unlikely(!x->updated || c == x || !x->parentid)) continue;
+
+ // classes have both parentid and leafid
+ // qdiscs have only parentid
+ // the following works for both (it is an OR)
+
+ if((c->hash == x->parent_hash && strcmp(c->id, x->parentid) == 0) ||
+ (c->leafid && c->leaf_hash == x->parent_hash && strcmp(c->leafid, x->parentid) == 0)) {
+ // 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);
+ c->isleaf = 0;
+ x->hasparent = 1;
+ }
+ }
+ }