mirror of
https://gitlab.nic.cz/labs/bird.git
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Routing table is now a resource allocated from its own pool
This also fixes memory leaks from import/export tables being never cleaned up and freed.
This commit is contained in:
Maria Matejka
parent
a9938b1792
commit
ff397df7ed
11
nest/proto.c
11
nest/proto.c
@ -518,11 +518,12 @@ void
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channel_setup_in_table(struct channel *c)
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{
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struct rtable_config *cf = mb_allocz(c->proto->pool, sizeof(struct rtable_config));
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cf->name = "import";
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cf->addr_type = c->net_type;
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cf->internal = 1;
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c->in_table = mb_allocz(c->proto->pool, sizeof(struct rtable));
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rt_setup(c->proto->pool, c->in_table, cf);
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c->in_table = rt_setup(c->proto->pool, cf);
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c->reload_event = ev_new_init(c->proto->pool, channel_reload_loop, c);
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}
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@ -534,9 +535,9 @@ channel_setup_out_table(struct channel *c)
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struct rtable_config *cf = mb_allocz(c->proto->pool, sizeof(struct rtable_config));
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cf->name = "export";
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cf->addr_type = c->net_type;
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cf->internal = 1;
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c->out_table = mb_allocz(c->proto->pool, sizeof(struct rtable));
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rt_setup(c->proto->pool, c->out_table, cf);
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c->out_table = rt_setup(c->proto->pool, cf);
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}
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@ -609,6 +610,8 @@ channel_do_down(struct channel *c)
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c->reload_event = NULL;
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c->out_table = NULL;
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/* The in_table and out_table are going to be freed by freeing their resource pools. */
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CALL(c->channel->cleanup, c);
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/* Schedule protocol shutddown */
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@ -148,12 +148,15 @@ struct rtable_config {
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int gc_max_ops; /* Maximum number of operations before GC is run */
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int gc_min_time; /* Minimum time between two consecutive GC runs */
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byte sorted; /* Routes of network are sorted according to rte_better() */
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byte internal; /* Internal table of a protocol */
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btime min_settle_time; /* Minimum settle time for notifications */
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btime max_settle_time; /* Maximum settle time for notifications */
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};
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typedef struct rtable {
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resource r;
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node n; /* Node in list of all tables */
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pool *rp; /* Resource pool to allocate everything from, including itself */
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struct fib fib;
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char *name; /* Name of this table */
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list channels; /* List of attached channels (struct channel) */
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@ -311,7 +314,9 @@ void rt_lock_table(rtable *);
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void rt_unlock_table(rtable *);
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void rt_subscribe(rtable *tab, struct rt_subscription *s);
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void rt_unsubscribe(struct rt_subscription *s);
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void rt_setup(pool *, rtable *, struct rtable_config *);
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rtable *rt_setup(pool *, struct rtable_config *);
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static inline void rt_shutdown(rtable *r) { rfree(r->rp); }
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static inline net *net_find(rtable *tab, const net_addr *addr) { return (net *) fib_find(&tab->fib, addr); }
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static inline net *net_find_valid(rtable *tab, const net_addr *addr)
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{ net *n = net_find(tab, addr); return (n && rte_is_valid(n->routes)) ? n : NULL; }
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151
nest/rt-table.c
151
nest/rt-table.c
@ -1839,7 +1839,7 @@ rt_kick_settle_timer(rtable *tab)
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tab->base_settle_time = current_time();
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if (!tab->settle_timer)
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tab->settle_timer = tm_new_init(rt_table_pool, rt_settle_timer, tab, 0, 0);
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tab->settle_timer = tm_new_init(tab->rp, rt_settle_timer, tab, 0, 0);
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if (!tm_active(tab->settle_timer))
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tm_set(tab->settle_timer, rt_settled_time(tab));
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@ -1872,23 +1872,78 @@ rt_unsubscribe(struct rt_subscription *s)
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rt_unlock_table(s->tab);
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}
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void
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rt_setup(pool *p, rtable *t, struct rtable_config *cf)
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static void
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rt_free(resource *_r)
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{
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bzero(t, sizeof(*t));
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rtable *r = (rtable *) _r;
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DBG("Deleting routing table %s\n", r->name);
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ASSERT_DIE(r->use_count == 0);
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r->config->table = NULL;
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rem_node(&r->n);
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if (r->hostcache)
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rt_free_hostcache(r);
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/* Freed automagically by the resource pool
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fib_free(&r->fib);
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hmap_free(&r->id_map);
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rfree(r->rt_event);
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rfree(r->settle_timer);
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mb_free(r);
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*/
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}
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static void
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rt_res_dump(resource *_r)
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{
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rtable *r = (rtable *) _r;
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debug("name \"%s\", addr_type=%s, rt_count=%u, use_count=%d\n",
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r->name, net_label[r->addr_type], r->rt_count, r->use_count);
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}
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static struct resclass rt_class = {
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.name = "Routing table",
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.size = sizeof(struct rtable),
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.free = rt_free,
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.dump = rt_res_dump,
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.lookup = NULL,
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.memsize = NULL,
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};
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rtable *
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rt_setup(pool *pp, struct rtable_config *cf)
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{
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int ns = strlen("Routing table ") + strlen(cf->name) + 1;
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void *nb = mb_alloc(pp, ns);
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ASSERT_DIE(ns - 1 == bsnprintf(nb, ns, "Routing table %s", cf->name));
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pool *p = rp_new(pp, nb);
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mb_move(nb, p);
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rtable *t = ralloc(p, &rt_class);
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t->rp = p;
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t->name = cf->name;
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t->config = cf;
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t->addr_type = cf->addr_type;
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fib_init(&t->fib, p, t->addr_type, sizeof(net), OFFSETOF(net, n), 0, NULL);
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init_list(&t->channels);
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hmap_init(&t->id_map, p, 1024);
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hmap_set(&t->id_map, 0);
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if (!cf->internal)
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{
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init_list(&t->channels);
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hmap_init(&t->id_map, p, 1024);
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hmap_set(&t->id_map, 0);
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t->rt_event = ev_new_init(p, rt_event, t);
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t->last_rt_change = t->gc_time = current_time();
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init_list(&t->subscribers);
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init_list(&t->subscribers);
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t->rt_event = ev_new_init(p, rt_event, t);
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t->last_rt_change = t->gc_time = current_time();
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}
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return t;
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}
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/**
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@ -2326,16 +2381,9 @@ rt_unlock_table(rtable *r)
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if (!--r->use_count && r->deleted)
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{
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struct config *conf = r->deleted;
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DBG("Deleting routing table %s\n", r->name);
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r->config->table = NULL;
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if (r->hostcache)
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rt_free_hostcache(r);
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rem_node(&r->n);
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fib_free(&r->fib);
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hmap_free(&r->id_map);
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rfree(r->rt_event);
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rfree(r->settle_timer);
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mb_free(r);
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/* Delete the routing table by freeing its pool */
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rt_shutdown(r);
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config_del_obstacle(conf);
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}
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}
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@ -2397,11 +2445,9 @@ rt_commit(struct config *new, struct config *old)
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WALK_LIST(r, new->tables)
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if (!r->table)
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{
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rtable *t = mb_allocz(rt_table_pool, sizeof(struct rtable));
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r->table = rt_setup(rt_table_pool, r);
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DBG("\t%s: created\n", r->name);
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rt_setup(rt_table_pool, t, r);
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add_tail(&routing_tables, &t->n);
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r->table = t;
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add_tail(&routing_tables, &r->table->n);
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}
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DBG("\tdone\n");
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}
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@ -2566,6 +2612,9 @@ rte_update_in(struct channel *c, const net_addr *n, rte *new, struct rte_src *sr
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if (!old)
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goto drop_withdraw;
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if (!net->routes)
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fib_delete(&tab->fib, net);
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return 1;
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}
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@ -2600,6 +2649,10 @@ drop_update:
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c->stats.imp_updates_received++;
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c->stats.imp_updates_ignored++;
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rte_free(new);
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if (!net->routes)
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fib_delete(&tab->fib, net);
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return 0;
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drop_withdraw:
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@ -2669,9 +2722,15 @@ rt_reload_channel_abort(struct channel *c)
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void
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rt_prune_sync(rtable *t, int all)
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{
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FIB_WALK(&t->fib, net, n)
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struct fib_iterator fit;
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FIB_ITERATE_INIT(&fit, &t->fib);
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again:
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FIB_ITERATE_START(&t->fib, &fit, net, n)
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{
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rte *e, **ee = &n->routes;
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while (e = *ee)
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{
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if (all || (e->flags & (REF_STALE | REF_DISCARD)))
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@ -2683,8 +2742,15 @@ rt_prune_sync(rtable *t, int all)
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else
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ee = &e->next;
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}
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if (all || !n->routes)
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{
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FIB_ITERATE_PUT(&fit);
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fib_delete(&t->fib, n);
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goto again;
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}
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}
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FIB_WALK_END;
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FIB_ITERATE_END;
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}
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@ -2750,6 +2816,9 @@ rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int re
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if (!old)
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goto drop_withdraw;
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if (!net->routes)
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fib_delete(&tab->fib, net);
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return 1;
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}
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@ -2809,7 +2878,7 @@ hc_remove(struct hostcache *hc, struct hostentry *he)
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#define HC_LO_ORDER 10
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static void
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hc_alloc_table(struct hostcache *hc, unsigned order)
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hc_alloc_table(struct hostcache *hc, pool *p, unsigned order)
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{
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uint hsize = 1 << order;
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hc->hash_order = order;
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@ -2817,18 +2886,18 @@ hc_alloc_table(struct hostcache *hc, unsigned order)
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hc->hash_max = (order >= HC_HI_ORDER) ? ~0U : (hsize HC_HI_MARK);
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hc->hash_min = (order <= HC_LO_ORDER) ? 0U : (hsize HC_LO_MARK);
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hc->hash_table = mb_allocz(rt_table_pool, hsize * sizeof(struct hostentry *));
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hc->hash_table = mb_allocz(p, hsize * sizeof(struct hostentry *));
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}
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static void
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hc_resize(struct hostcache *hc, unsigned new_order)
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hc_resize(struct hostcache *hc, pool *p, unsigned new_order)
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{
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struct hostentry **old_table = hc->hash_table;
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struct hostentry *he, *hen;
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uint old_size = 1 << hc->hash_order;
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uint i;
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hc_alloc_table(hc, new_order);
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hc_alloc_table(hc, p, new_order);
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for (i = 0; i < old_size; i++)
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for (he = old_table[i]; he != NULL; he=hen)
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{
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@ -2839,7 +2908,7 @@ hc_resize(struct hostcache *hc, unsigned new_order)
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}
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static struct hostentry *
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hc_new_hostentry(struct hostcache *hc, ip_addr a, ip_addr ll, rtable *dep, unsigned k)
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hc_new_hostentry(struct hostcache *hc, pool *p, ip_addr a, ip_addr ll, rtable *dep, unsigned k)
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{
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struct hostentry *he = sl_alloc(hc->slab);
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@ -2855,13 +2924,13 @@ hc_new_hostentry(struct hostcache *hc, ip_addr a, ip_addr ll, rtable *dep, unsig
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hc->hash_items++;
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if (hc->hash_items > hc->hash_max)
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hc_resize(hc, hc->hash_order + HC_HI_STEP);
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hc_resize(hc, p, hc->hash_order + HC_HI_STEP);
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return he;
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}
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static void
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hc_delete_hostentry(struct hostcache *hc, struct hostentry *he)
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hc_delete_hostentry(struct hostcache *hc, pool *p, struct hostentry *he)
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{
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rta_free(he->src);
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@ -2871,20 +2940,20 @@ hc_delete_hostentry(struct hostcache *hc, struct hostentry *he)
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hc->hash_items--;
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if (hc->hash_items < hc->hash_min)
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hc_resize(hc, hc->hash_order - HC_LO_STEP);
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hc_resize(hc, p, hc->hash_order - HC_LO_STEP);
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}
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static void
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rt_init_hostcache(rtable *tab)
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{
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struct hostcache *hc = mb_allocz(rt_table_pool, sizeof(struct hostcache));
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struct hostcache *hc = mb_allocz(tab->rp, sizeof(struct hostcache));
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init_list(&hc->hostentries);
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hc->hash_items = 0;
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hc_alloc_table(hc, HC_DEF_ORDER);
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hc->slab = sl_new(rt_table_pool, sizeof(struct hostentry));
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hc_alloc_table(hc, tab->rp, HC_DEF_ORDER);
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hc->slab = sl_new(tab->rp, sizeof(struct hostentry));
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hc->lp = lp_new(rt_table_pool, LP_GOOD_SIZE(1024));
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hc->lp = lp_new(tab->rp, LP_GOOD_SIZE(1024));
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hc->trie = f_new_trie(hc->lp, 0);
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tab->hostcache = hc;
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@ -2905,10 +2974,12 @@ rt_free_hostcache(rtable *tab)
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log(L_ERR "Hostcache is not empty in table %s", tab->name);
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}
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/* Freed automagically by the resource pool
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rfree(hc->slab);
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rfree(hc->lp);
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mb_free(hc->hash_table);
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mb_free(hc);
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*/
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}
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static void
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@ -3051,7 +3122,7 @@ rt_update_hostcache(rtable *tab)
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he = SKIP_BACK(struct hostentry, ln, n);
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if (!he->uc)
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{
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hc_delete_hostentry(hc, he);
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hc_delete_hostentry(hc, tab->rp, he);
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continue;
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}
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@ -3076,7 +3147,7 @@ rt_get_hostentry(rtable *tab, ip_addr a, ip_addr ll, rtable *dep)
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if (ipa_equal(he->addr, a) && (he->tab == dep))
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return he;
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he = hc_new_hostentry(hc, a, ipa_zero(ll) ? a : ll, dep, k);
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he = hc_new_hostentry(hc, tab->rp, a, ipa_zero(ll) ? a : ll, dep, k);
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rt_update_hostentry(tab, he);
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return he;
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}
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@ -317,7 +317,7 @@ static void
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krt_learn_scan(struct krt_proto *p, rte *e)
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{
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net *n0 = e->net;
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net *n = net_get(&p->krt_table, n0->n.addr);
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net *n = net_get(p->krt_table, n0->n.addr);
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rte *m, **mm;
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e->attrs = rta_lookup(e->attrs);
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@ -354,7 +354,7 @@ krt_learn_scan(struct krt_proto *p, rte *e)
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static void
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krt_learn_prune(struct krt_proto *p)
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{
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struct fib *fib = &p->krt_table.fib;
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struct fib *fib = &p->krt_table->fib;
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struct fib_iterator fit;
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KRT_TRACE(p, D_EVENTS, "Pruning inherited routes");
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@ -430,7 +430,7 @@ static void
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krt_learn_async(struct krt_proto *p, rte *e, int new)
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{
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net *n0 = e->net;
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net *n = net_get(&p->krt_table, n0->n.addr);
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net *n = net_get(p->krt_table, n0->n.addr);
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rte *g, **gg, *best, **bestp, *old_best;
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e->attrs = rta_lookup(e->attrs);
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@ -511,8 +511,9 @@ krt_learn_init(struct krt_proto *p)
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struct rtable_config *cf = mb_allocz(p->p.pool, sizeof(struct rtable_config));
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cf->name = "Inherited";
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cf->addr_type = p->p.net_type;
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cf->internal = 1;
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rt_setup(p->p.pool, &p->krt_table, cf);
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p->krt_table = rt_setup(p->p.pool, cf);
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}
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}
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@ -524,7 +525,7 @@ krt_dump(struct proto *P)
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if (!KRT_CF->learn)
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return;
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debug("KRT: Table of inheritable routes\n");
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rt_dump(&p->krt_table);
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rt_dump(p->krt_table);
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}
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static void
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@ -49,7 +49,7 @@ struct krt_proto {
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struct krt_state sys; /* Sysdep state */
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#ifdef KRT_ALLOW_LEARN
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struct rtable krt_table; /* Internal table of inherited routes */
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struct rtable *krt_table; /* Internal table of inherited routes */
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#endif
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#ifndef CONFIG_ALL_TABLES_AT_ONCE
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