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Code Releases Activity

Prefilter runs before generating feeds

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This commit is contained in:
Maria Matejka 2024-06-16 21:36:45 +02:00
parent d6233b4de0
commit a1405a5bc7
4 changed files with 41 additions and 20 deletions
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8
nest/route.h
View File

@ -225,7 +225,7 @@ struct rt_exporter {
netindex_hash *netindex; /* Table for net <-> id conversion */
void (*stopped)(struct rt_exporter *); /* Callback when exporter can stop */
void (*cleanup_done)(struct rt_exporter *, u64 end); /* Callback when cleanup has been done */
struct rt_export_feed *(*feed_net)(struct rt_exporter *, struct rcu_unwinder *, u32, const struct rt_export_item *first);
struct rt_export_feed *(*feed_net)(struct rt_exporter *, struct rcu_unwinder *, u32, _Bool (*)(struct rt_export_feeder *, const net_addr *), struct rt_export_feeder *, const struct rt_export_item *first);
void (*feed_cleanup)(struct rt_exporter *, struct rt_export_feeder *);
};
@ -313,6 +313,12 @@ static inline int rt_prefilter_net(const struct rt_prefilter *p, const net_addr
static inline _Bool
rt_net_is_feeding_feeder(struct rt_export_feeder *ref, const net_addr *n)
{
if (!rt_prefilter_net(&ref->prefilter, n))
return 0;
if (!ref->feeding)
return 1;
for (struct rt_feeding_request *rfr = ref->feeding; rfr; rfr = rfr->next)
if (rt_prefilter_net(&rfr->prefilter, n))
return 1;

14
nest/rt-export.c
View File

@ -149,13 +149,13 @@ rt_export_get(struct rt_export_request *r)
if (r->feeder.domain.rtable)
{
LOCK_DOMAIN(rtable, r->feeder.domain);
feed = e->feed_net(e, NULL, ni->index, update);
feed = e->feed_net(e, NULL, ni->index, NULL, NULL, update);
UNLOCK_DOMAIN(rtable, r->feeder.domain);
}
else
{
RCU_ANCHOR(u);
feed = e->feed_net(e, u, ni->index, update);
feed = e->feed_net(e, u, ni->index, NULL, NULL, update);
}
bmap_set(&r->feed_map, ni->index);
@ -263,7 +263,8 @@ rt_export_get_next_feed(struct rt_export_feeder *f, struct rcu_unwinder *u)
return NULL;
}
struct rt_export_feed *feed = e->feed_net(e, u, f->feed_index, NULL);
struct rt_export_feed *feed = e->feed_net(e, u, f->feed_index,
rt_net_is_feeding_feeder, f, NULL);
if (feed == &rt_feed_index_out_of_range)
{
rtex_trace(f, D_ROUTES, "Nothing more to feed", f->feed_index);
@ -280,13 +281,6 @@ rt_export_get_next_feed(struct rt_export_feeder *f, struct rcu_unwinder *u)
if (!feed)
NOT_THIS_FEED("Nothing found for index %u", f->feed_index);
struct netindex *ni = feed->ni;
if (!rt_prefilter_net(&f->prefilter, ni->addr))
NOT_THIS_FEED("Not feeding %N due to prefilter", ni->addr);
if (f->feeding && !rt_net_is_feeding_feeder(f, ni->addr))
NOT_THIS_FEED("Not feeding %N, not requested", ni->addr);
f->feed_index++;
return feed;
}

32
nest/rt-table.c
View File

@ -2209,7 +2209,7 @@ rt_net_feed_validate_first(
}
static struct rt_export_feed *
rt_net_feed_index(struct rtable_reading *tr, net *n, const struct rt_pending_export *first)
rt_net_feed_index(struct rtable_reading *tr, net *n, _Bool (*prefilter)(struct rt_export_feeder *, const net_addr *), struct rt_export_feeder *f, const struct rt_pending_export *first)
{
/* Get the feed itself. It may change under our hands tho. */
struct rt_pending_export *first_in_net, *last_in_net;
@ -2230,10 +2230,19 @@ rt_net_feed_index(struct rtable_reading *tr, net *n, const struct rt_pending_exp
ocnt++;
}
if (ecnt) {
const net_addr *a = (first->it.new ?: first->it.old)->net;
if (prefilter && !prefilter(f, a))
return NULL;
}
struct rt_export_feed *feed = NULL;
if (rcnt || ocnt || ecnt)
{
if (!ecnt && prefilter && !prefilter(f, NET_READ_BEST_ROUTE(tr, n)->rte.net))
return NULL;
feed = rt_alloc_feed(rcnt+ocnt, ecnt);
if (rcnt)
@ -2276,13 +2285,13 @@ rt_net_feed_index(struct rtable_reading *tr, net *n, const struct rt_pending_exp
}
static struct rt_export_feed *
rt_net_feed_internal(struct rtable_reading *tr, u32 index, const struct rt_pending_export *first)
rt_net_feed_internal(struct rtable_reading *tr, u32 index, _Bool (*prefilter)(struct rt_export_feeder *, const net_addr *), struct rt_export_feeder *f, const struct rt_pending_export *first)
{
net *n = rt_net_feed_get_net(tr, index);
if (!n)
return &rt_feed_index_out_of_range;
return rt_net_feed_index(tr, n, first);
return rt_net_feed_index(tr, n, prefilter, f, first);
}
struct rt_export_feed *
@ -2290,14 +2299,14 @@ rt_net_feed(rtable *t, const net_addr *a, const struct rt_pending_export *first)
{
RT_READ(t, tr);
const struct netindex *ni = net_find_index(tr->t->netindex, a);
return ni ? rt_net_feed_internal(tr, ni->index, first) : NULL;
return ni ? rt_net_feed_internal(tr, ni->index, NULL, NULL, first) : NULL;
}
static struct rt_export_feed *
rt_feed_net_all(struct rt_exporter *e, struct rcu_unwinder *u, u32 index, const struct rt_export_item *_first)
rt_feed_net_all(struct rt_exporter *e, struct rcu_unwinder *u, u32 index, _Bool (*prefilter)(struct rt_export_feeder *, const net_addr *), struct rt_export_feeder *f, const struct rt_export_item *_first)
{
RT_READ_ANCHORED(SKIP_BACK(rtable, export_all, e), tr, u);
return rt_net_feed_internal(tr, index, SKIP_BACK(const struct rt_pending_export, it, _first));
return rt_net_feed_internal(tr, index, prefilter, f, SKIP_BACK(const struct rt_pending_export, it, _first));
}
rte
@ -2322,7 +2331,7 @@ rt_net_best(rtable *t, const net_addr *a)
}
static struct rt_export_feed *
rt_feed_net_best(struct rt_exporter *e, struct rcu_unwinder *u, u32 index, const struct rt_export_item *_first)
rt_feed_net_best(struct rt_exporter *e, struct rcu_unwinder *u, u32 index, _Bool (*prefilter)(struct rt_export_feeder *, const net_addr *), struct rt_export_feeder *f, const struct rt_export_item *_first)
{
SKIP_BACK_DECLARE(rtable, t, export_best, e);
SKIP_BACK_DECLARE(const struct rt_pending_export, first, it, _first);
@ -2344,8 +2353,15 @@ rt_feed_net_best(struct rt_exporter *e, struct rcu_unwinder *u, u32 index, const
rpe = atomic_load_explicit(&rpe->next, memory_order_acquire))
ecnt++;
if (ecnt) {
const net_addr *a = (first->it.new ?: first->it.old)->net;
if (prefilter && !prefilter(f, a))
return NULL;
}
struct rte_storage *best = NET_READ_BEST_ROUTE(tr, n);
if (!ecnt && !best)
if (!ecnt && (!best || prefilter && !prefilter(f, best->rte.net)))
return NULL;
struct rt_export_feed *feed = rt_alloc_feed(!!best, ecnt);

7
proto/bgp/attrs.c
View File

@ -1879,17 +1879,22 @@ bgp_out_item_done(struct lfjour *j, struct lfjour_item *i)
{}
static struct rt_export_feed *
bgp_out_feed_net(struct rt_exporter *e, struct rcu_unwinder *u, u32 index, const struct rt_export_item *_first)
bgp_out_feed_net(struct rt_exporter *e, struct rcu_unwinder *u, u32 index, _Bool (*prefilter)(struct rt_export_feeder *, const net_addr *), struct rt_export_feeder *f, const struct rt_export_item *_first)
{
ASSERT_DIE(u == NULL);
SKIP_BACK_DECLARE(struct bgp_ptx_private, c, exporter, e);
ASSERT_DIE(DOMAIN_IS_LOCKED(rtable, c->lock));
struct netindex *ni = net_resolve_index(c->c->c.table->netindex, index);
if (ni == &net_index_out_of_range)
return &rt_feed_index_out_of_range;
if (ni == NULL)
return NULL;
if (prefilter && !prefilter(f, ni->addr))
return NULL;
struct rt_export_feed *feed = NULL;
uint count = 0;