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https://gitlab.nic.cz/labs/bird.git
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Route export: passing the export state in a dedicated structure
This commit is contained in:
Maria Matejka
Maria Matejka
parent
eb5298f3e1
commit
1f5a3605cf
252
nest/rt-table.c
252
nest/rt-table.c
@ -351,6 +351,14 @@ rte_free_quick(rte *e)
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sl_free(rte_slab, e);
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}
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struct rte_export_internal {
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struct rte_export pub;
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rte *new_best;
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rte *old_best;
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rte *rt_free;
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uint refeed:1;
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};
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static int /* Actually better or at least as good as */
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rte_better(rte *new, rte *old)
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{
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@ -481,17 +489,18 @@ export_filter(struct channel *c, rte *rt0, rte **rt_free, int silent)
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}
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static void
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do_rt_notify(struct channel *c, net *net, rte *new, rte *old, int refeed)
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do_rt_notify(struct channel *c, struct rte_export_internal *e)
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{
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struct proto *p = c->proto;
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struct proto_stats *stats = &c->stats;
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struct rte_export *ep = &(e->pub);
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if (refeed && new)
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if (e->refeed && ep->new)
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c->refeed_count++;
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/* Apply export limit */
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struct channel_limit *l = &c->out_limit;
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if (l->action && !old && new)
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if (l->action && !ep->old && ep->new)
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{
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if (stats->exp_routes >= l->limit)
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channel_notify_limit(c, l, PLD_OUT, stats->exp_routes);
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@ -499,98 +508,82 @@ do_rt_notify(struct channel *c, net *net, rte *new, rte *old, int refeed)
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if (l->state == PLS_BLOCKED)
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{
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stats->exp_updates_rejected++;
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rte_trace_out(D_FILTERS, p, new, "rejected [limit]");
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rte_trace_out(D_FILTERS, p, ep->new, "rejected [limit]");
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return;
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}
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}
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struct rte_src *src = old ? old->attrs->src : new->attrs->src;
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/* Apply export table */
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struct rte *old_exported = NULL;
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rte *old_exported = NULL;
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if (c->out_table)
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{
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if (!rte_update_out(c, net->n.addr, src, new, &old_exported, refeed))
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if (!rte_update_out(c, ep->net->n.addr, ep->old_src, ep->new, &(old_exported), e->refeed))
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return;
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}
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else if (c->out_filter == FILTER_ACCEPT)
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old_exported = old;
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old_exported = ep->old;
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if (new)
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if (ep->new)
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stats->exp_updates_accepted++;
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else
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stats->exp_withdraws_accepted++;
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if (old)
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if (ep->old)
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{
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bmap_clear(&c->export_map, old->id);
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bmap_clear(&c->export_map, ep->old->id);
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stats->exp_routes--;
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}
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if (new)
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if (ep->new)
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{
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bmap_set(&c->export_map, new->id);
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bmap_set(&c->export_map, ep->new->id);
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stats->exp_routes++;
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}
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if (p->debug & D_ROUTES)
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{
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if (new && old)
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rte_trace_out(D_ROUTES, p, new, "replaced");
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else if (new)
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rte_trace_out(D_ROUTES, p, new, "added");
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else if (old)
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rte_trace_out(D_ROUTES, p, old, "removed");
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if (ep->new && ep->old)
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rte_trace_out(D_ROUTES, p, ep->new, "replaced");
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else if (ep->new)
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rte_trace_out(D_ROUTES, p, ep->new, "added");
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else if (ep->old)
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rte_trace_out(D_ROUTES, p, ep->old, "removed");
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}
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struct rte_export export = {
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.net = net,
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.new_src = new ? new->attrs->src : NULL,
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.new = new,
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.old_src = old ? old->attrs->src : NULL,
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.old = old,
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};
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ep->old = old_exported;
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p->rt_notify(c, &export);
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p->rt_notify(c, ep);
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if (c->out_table && old_exported)
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rte_free_quick(old_exported);
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}
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static void
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rt_notify_basic(struct channel *c, net *net, rte *new, rte *old, int refeed)
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rt_notify_basic(struct channel *c, struct rte_export_internal *e)
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{
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// struct proto *p = c->proto;
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rte *new_free = NULL;
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if (new)
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if (e->pub.new)
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c->stats.exp_updates_received++;
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else
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c->stats.exp_withdraws_received++;
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if (new)
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new = export_filter(c, new, &new_free, 0);
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if (e->pub.new)
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e->pub.new = export_filter(c, e->pub.new, &e->rt_free, 0);
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if (old && !bmap_test(&c->export_map, old->id))
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old = NULL;
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if (e->pub.old && !bmap_test(&c->export_map, e->pub.old->id))
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e->pub.old = NULL;
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if (!new && !old)
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if (!e->pub.new && !e->pub.old)
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return;
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do_rt_notify(c, net, new, old, refeed);
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/* Discard temporary rte */
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if (new_free)
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rte_free(new_free);
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do_rt_notify(c, e);
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}
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static void
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rt_notify_accepted(struct channel *c, net *net, rte *new_changed, rte *old_changed, int refeed)
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rt_notify_accepted(struct channel *c, struct rte_export_internal *e)
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{
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// struct proto *p = c->proto;
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rte *new_best = NULL;
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rte *old_best = NULL;
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rte *new_free = NULL;
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int new_first = 0;
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/*
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@ -609,17 +602,17 @@ rt_notify_accepted(struct channel *c, net *net, rte *new_changed, rte *old_chang
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* old_best is after new_changed -> try new_changed, otherwise old_best
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*/
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if (net->routes)
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if (e->pub.net->routes)
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c->stats.exp_updates_received++;
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else
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c->stats.exp_withdraws_received++;
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/* Find old_best - either old_changed, or route for net->routes */
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if (old_changed && bmap_test(&c->export_map, old_changed->id))
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old_best = old_changed;
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if (e->pub.old && bmap_test(&c->export_map, e->pub.old->id))
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old_best = e->pub.old;
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else
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{
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for (rte *r = net->routes; rte_is_valid(r); r = r->next)
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for (rte *r = e->pub.net->routes; rte_is_valid(r); r = r->next)
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{
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if (bmap_test(&c->export_map, r->id))
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{
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@ -628,24 +621,24 @@ rt_notify_accepted(struct channel *c, net *net, rte *new_changed, rte *old_chang
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}
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/* Note if new_changed found before old_best */
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if (r == new_changed)
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if (r == e->pub.new)
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new_first = 1;
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}
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}
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/* Find new_best */
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if ((new_changed == old_changed) || (old_best == old_changed))
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if ((e->pub.new == e->pub.old) || (old_best == e->pub.old))
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{
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/* Feed or old_best changed -> find first accepted by filters */
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for (rte *r = net->routes; rte_is_valid(r); r = r->next)
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if (new_best = export_filter(c, r, &new_free, 0))
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for (rte *r = e->pub.net->routes; rte_is_valid(r); r = r->next)
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if (new_best = export_filter(c, r, &e->rt_free, 0))
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break;
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}
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else
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{
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/* Other cases -> either new_changed, or old_best (and nothing changed) */
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if (new_first && (new_changed = export_filter(c, new_changed, &new_free, 0)))
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new_best = new_changed;
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if (new_first && (e->pub.new = export_filter(c, e->pub.new, &e->rt_free, 0)))
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new_best = e->pub.new;
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else
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return;
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}
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@ -653,11 +646,12 @@ rt_notify_accepted(struct channel *c, net *net, rte *new_changed, rte *old_chang
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if (!new_best && !old_best)
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return;
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do_rt_notify(c, net, new_best, old_best, refeed);
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e->pub.new = new_best;
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e->pub.new_src = new_best ? new_best->attrs->src : NULL;
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e->pub.old = old_best;
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e->pub.old_src = old_best ? old_best->attrs->src : NULL;
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/* Discard temporary rte */
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if (new_free)
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rte_free(new_free);
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do_rt_notify(c, e);
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}
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@ -721,46 +715,41 @@ rt_export_merged(struct channel *c, net *net, rte **rt_free, linpool *pool, int
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static void
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rt_notify_merged(struct channel *c, net *net, rte *new_changed, rte *old_changed,
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rte *new_best, rte *old_best, int refeed)
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rt_notify_merged(struct channel *c, struct rte_export_internal *e)
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{
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// struct proto *p = c->proto;
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rte *new_free = NULL;
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/* We assume that all rte arguments are either NULL or rte_is_valid() */
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/* This check should be done by the caller */
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if (!new_best && !old_best)
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if (!e->new_best && !e->old_best)
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return;
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/* Check whether the change is relevant to the merged route */
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if ((new_best == old_best) &&
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(new_changed != old_changed) &&
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!rte_mergable(new_best, new_changed) &&
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!rte_mergable(old_best, old_changed))
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if ((e->new_best == e->old_best) &&
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(e->pub.new != e->pub.old) &&
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!rte_mergable(e->new_best, e->pub.new) &&
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!rte_mergable(e->old_best, e->pub.old))
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return;
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if (new_best)
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if (e->new_best)
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c->stats.exp_updates_received++;
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else
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c->stats.exp_withdraws_received++;
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/* Prepare new merged route */
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if (new_best)
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new_best = rt_export_merged(c, net, &new_free, rte_update_pool, 0);
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if (e->new_best)
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e->pub.new = rt_export_merged(c, e->pub.net, &(e->rt_free), rte_update_pool, 0);
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/* Check old merged route */
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if (old_best && !bmap_test(&c->export_map, old_best->id))
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old_best = NULL;
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if (e->old_best && !bmap_test(&c->export_map, e->old_best->id))
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e->pub.old = NULL;
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if (!new_best && !old_best)
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if (!e->pub.new && !e->pub.old)
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return;
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do_rt_notify(c, net, new_best, old_best, refeed);
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e->pub.new_src = e->pub.new ? e->pub.new->attrs->src : NULL;
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e->pub.old_src = e->pub.old ? e->pub.old->attrs->src : NULL;
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/* Discard temporary rte */
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if (new_free)
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rte_free(new_free);
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do_rt_notify(c, e);
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}
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@ -842,26 +831,48 @@ rte_announce(rtable *tab, uint type, net *net, rte *new, rte *old,
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if (type && (type != c->ra_mode))
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continue;
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struct rte_export_internal e = {
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.pub = {
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.net = net,
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.new_src = new ? new->attrs->src : NULL,
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.new = new,
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.old_src = old ? old->attrs->src : NULL,
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.old = old,
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},
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.new_best = new_best,
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.old_best = old_best,
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};
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switch (c->ra_mode)
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{
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case RA_OPTIMAL:
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if (new_best != old_best)
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rt_notify_basic(c, net, new_best, old_best, 0);
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{
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e.pub.new = new_best;
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e.pub.new_src = new_best ? new_best->attrs->src : NULL;
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e.pub.old = old_best;
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e.pub.old_src = old_best ? old_best->attrs->src : NULL;
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rt_notify_basic(c, &e);
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}
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break;
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case RA_ANY:
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if (new != old)
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rt_notify_basic(c, net, new, old, 0);
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rt_notify_basic(c, &e);
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break;
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case RA_ACCEPTED:
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rt_notify_accepted(c, net, new, old, 0);
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rt_notify_accepted(c, &e);
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break;
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case RA_MERGED:
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rt_notify_merged(c, net, new, old, new_best, old_best, 0);
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rt_notify_merged(c, &e);
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break;
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}
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/* Discard temporary rte */
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if (e.rt_free)
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rte_free(e.rt_free);
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}
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}
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@ -2104,19 +2115,6 @@ rt_commit(struct config *new, struct config *old)
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DBG("\tdone\n");
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}
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static inline void
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do_feed_channel(struct channel *c, net *n, rte *e)
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{
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rte_update_lock();
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if (c->ra_mode == RA_ACCEPTED)
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rt_notify_accepted(c, n, NULL, NULL, c->refeeding);
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else if (c->ra_mode == RA_MERGED)
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rt_notify_merged(c, n, NULL, NULL, e, e, c->refeeding);
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else /* RA_BASIC */
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rt_notify_basic(c, n, e, e, c->refeeding);
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rte_update_unlock();
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}
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/**
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* rt_feed_channel - advertise all routes to a channel
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* @c: channel to be fed
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@ -2142,39 +2140,57 @@ rt_feed_channel(struct channel *c)
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FIB_ITERATE_START(&c->table->fib, fit, net, n)
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{
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rte *e = n->routes;
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if (max_feed <= 0)
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{
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FIB_ITERATE_PUT(fit);
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return 0;
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}
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if ((c->ra_mode == RA_OPTIMAL) ||
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(c->ra_mode == RA_ACCEPTED) ||
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(c->ra_mode == RA_MERGED))
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for (rte *e = n->routes; e; e = e->next)
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{
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if (c->export_state != ES_FEEDING)
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goto done;
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if (rte_is_valid(e))
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{
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/* In the meantime, the protocol may fell down */
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if (c->export_state != ES_FEEDING)
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goto done;
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{
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max_feed--;
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do_feed_channel(c, n, e);
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max_feed--;
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struct rte_export_internal ee = {
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.pub = {
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.net = n,
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},
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.new_best = n->routes,
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.old_best = n->routes,
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.refeed = c->refeeding,
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};
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switch (c->ra_mode) {
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case RA_OPTIMAL:
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case RA_ANY:
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ee.pub.new = e;
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ee.pub.new_src = e->attrs->src;
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ee.pub.old = e;
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ee.pub.old_src = e->attrs->src;
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rt_notify_basic(c, &ee);
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break;
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case RA_ACCEPTED:
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rt_notify_accepted(c, &ee);
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break;
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case RA_MERGED:
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rt_notify_merged(c, &ee);
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break;
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default:
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ASSERT(0);
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}
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if (c->ra_mode == RA_ANY)
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for(e = n->routes; e; e = e->next)
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{
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/* In the meantime, the protocol may fell down */
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if (c->export_state != ES_FEEDING)
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goto done;
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/* Discard temporary rte */
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if (ee.rt_free)
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rte_free(ee.rt_free);
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}
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if (!rte_is_valid(e))
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continue;
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do_feed_channel(c, n, e);
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max_feed--;
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}
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if (c->ra_mode != RA_ANY)
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break;
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}
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}
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FIB_ITERATE_END;
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