mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-11-08 12:18:42 +00:00
Export: More elegant export dispatcher.
The previous version was a little bit spooky.
This commit is contained in:
Maria Matejka
parent
52b6e35251
commit
63f4ccc8c5
208
nest/rt-table.c
208
nest/rt-table.c
@ -352,7 +352,7 @@ rte_free_quick(rte *e)
|
||||
}
|
||||
|
||||
struct rte_export_internal {
|
||||
struct rte_export pub;
|
||||
net *net;
|
||||
rte *new, *old, *new_best, *old_best;
|
||||
rte *rt_free;
|
||||
_Bool refeed;
|
||||
@ -569,9 +569,11 @@ do_rt_notify(struct channel *c, struct rte_export *ep, _Bool refeed)
|
||||
rte_free_quick(old_exported);
|
||||
}
|
||||
|
||||
USE_RESULT static _Bool
|
||||
USE_RESULT static struct rte_export *
|
||||
rt_notify_basic(struct channel *c, struct rte_export_internal *e)
|
||||
{
|
||||
struct rte_export *ep = lp_allocz(rte_update_pool, sizeof(struct rte_export));
|
||||
|
||||
if (e->new)
|
||||
c->stats.exp_updates_received++;
|
||||
else
|
||||
@ -579,25 +581,26 @@ rt_notify_basic(struct channel *c, struct rte_export_internal *e)
|
||||
|
||||
if (e->new)
|
||||
{
|
||||
e->pub.new = export_filter(c, e->new, &e->rt_free, 0);
|
||||
e->pub.new_src = e->new->attrs->src;
|
||||
ep->new = export_filter(c, e->new, &e->rt_free, 0);
|
||||
ep->new_src = e->new->attrs->src;
|
||||
}
|
||||
|
||||
if (e->old && bmap_test(&c->export_map, e->old->id))
|
||||
{
|
||||
e->pub.old = e->old;
|
||||
e->pub.old_src = e->old->attrs->src;
|
||||
ep->old = e->old;
|
||||
ep->old_src = e->old->attrs->src;
|
||||
}
|
||||
|
||||
return e->pub.new || e->pub.old;
|
||||
return (ep->new || ep->old) ? ep : NULL;
|
||||
}
|
||||
|
||||
USE_RESULT static _Bool
|
||||
rt_notify_accepted(struct channel *c, net *net, struct rte_export_internal *e)
|
||||
USE_RESULT static struct rte_export *
|
||||
rt_notify_accepted(struct channel *c, struct rte_export_internal *e)
|
||||
{
|
||||
// struct proto *p = c->proto;
|
||||
rte *new_best = NULL;
|
||||
rte *old_best = NULL;
|
||||
rte *new_filtered = NULL;
|
||||
int new_first = 0;
|
||||
|
||||
/*
|
||||
@ -616,7 +619,7 @@ rt_notify_accepted(struct channel *c, net *net, struct rte_export_internal *e)
|
||||
* old_best is after new_changed -> try new_changed, otherwise old_best
|
||||
*/
|
||||
|
||||
if (net->routes)
|
||||
if (e->net->routes)
|
||||
c->stats.exp_updates_received++;
|
||||
else
|
||||
c->stats.exp_withdraws_received++;
|
||||
@ -626,7 +629,7 @@ rt_notify_accepted(struct channel *c, net *net, struct rte_export_internal *e)
|
||||
old_best = e->old;
|
||||
else
|
||||
{
|
||||
for (rte *r = net->routes; rte_is_valid(r); r = r->next)
|
||||
for (rte *r = e->net->routes; rte_is_valid(r); r = r->next)
|
||||
{
|
||||
if (bmap_test(&c->export_map, r->id))
|
||||
{
|
||||
@ -644,15 +647,15 @@ rt_notify_accepted(struct channel *c, net *net, struct rte_export_internal *e)
|
||||
if ((e->new == e->old) || (old_best == e->old))
|
||||
{
|
||||
/* Feed or old_best changed -> find first accepted by filters */
|
||||
for (rte *r = net->routes; rte_is_valid(r); r = r->next)
|
||||
for (rte *r = e->net->routes; rte_is_valid(r); r = r->next)
|
||||
if (new_best = export_filter(c, r, &e->rt_free, 0))
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* Other cases -> either new_changed, or old_best (and nothing changed) */
|
||||
if (new_first && (e->pub.new = export_filter(c, e->new, &e->rt_free, 0)))
|
||||
new_best = e->pub.new;
|
||||
if (new_first && (new_filtered = export_filter(c, e->new, &e->rt_free, 0)))
|
||||
new_best = new_filtered;
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
@ -660,12 +663,15 @@ rt_notify_accepted(struct channel *c, net *net, struct rte_export_internal *e)
|
||||
if (!new_best && !old_best)
|
||||
return 0;
|
||||
|
||||
e->pub.new = new_best;
|
||||
e->pub.new_src = new_best ? new_best->attrs->src : NULL;
|
||||
e->pub.old = old_best;
|
||||
e->pub.old_src = old_best ? old_best->attrs->src : NULL;
|
||||
struct rte_export *ep = lp_alloc(rte_update_pool, sizeof(struct rte_export));
|
||||
*ep = (struct rte_export) {
|
||||
.new = new_best,
|
||||
.new_src = new_best ? new_best->attrs->src : NULL,
|
||||
.old = old_best,
|
||||
.old_src = old_best ? old_best->attrs->src : NULL,
|
||||
};
|
||||
|
||||
return 1;
|
||||
return ep;
|
||||
}
|
||||
|
||||
|
||||
@ -728,117 +734,90 @@ rt_export_merged(struct channel *c, net *net, rte **rt_free, linpool *pool, int
|
||||
}
|
||||
|
||||
|
||||
USE_RESULT static _Bool
|
||||
rt_notify_merged(struct channel *c, net *net, struct rte_export_internal *e)
|
||||
USE_RESULT static struct rte_export *
|
||||
rt_notify_merged(struct channel *c, struct rte_export_internal *e)
|
||||
{
|
||||
/* We assume that all rte arguments are either NULL or rte_is_valid() */
|
||||
|
||||
/* This check should be done by the caller */
|
||||
if (!e->new_best && !e->old_best)
|
||||
return 0;
|
||||
return NULL;
|
||||
|
||||
/* Check whether the change is relevant to the merged route */
|
||||
if ((e->new_best == e->old_best) &&
|
||||
(e->new != e->old) &&
|
||||
!rte_mergable(e->new_best, e->new) &&
|
||||
!rte_mergable(e->old_best, e->old))
|
||||
return 0;
|
||||
return NULL;
|
||||
|
||||
if (e->new_best)
|
||||
c->stats.exp_updates_received++;
|
||||
else
|
||||
c->stats.exp_withdraws_received++;
|
||||
|
||||
struct rte_export *ep = lp_allocz(rte_update_pool, sizeof(struct rte_export));
|
||||
|
||||
/* Prepare new merged route */
|
||||
if (e->new_best)
|
||||
{
|
||||
e->pub.new = rt_export_merged(c, net, &(e->rt_free), rte_update_pool, 0);
|
||||
e->pub.new_src = net->routes->attrs->src;
|
||||
ep->new = rt_export_merged(c, e->net, &(e->rt_free), rte_update_pool, 0);
|
||||
ep->new_src = e->net->routes->attrs->src;
|
||||
}
|
||||
|
||||
/* Check old merged route */
|
||||
if (e->old_best && !bmap_test(&c->export_map, e->old_best->id))
|
||||
e->pub.old = NULL;
|
||||
if (e->old_best)
|
||||
ep->old = bmap_test(&c->export_map, e->old_best->id) ? e->old_best : NULL;
|
||||
|
||||
if (!e->pub.new && !e->pub.old)
|
||||
return 0;
|
||||
if (!ep->new && !ep->old)
|
||||
return NULL;
|
||||
|
||||
e->pub.old_src = e->pub.old ? e->pub.old->attrs->src : NULL;
|
||||
|
||||
return 1;
|
||||
ep->old_src = ep->old ? ep->old->attrs->src : NULL;
|
||||
return ep;
|
||||
}
|
||||
|
||||
static inline void
|
||||
rte_export_finish(struct channel *c, struct rte_export_internal *e)
|
||||
static void
|
||||
rte_export(struct channel *c, struct rte_export_internal *e)
|
||||
{
|
||||
if (e->rt_free)
|
||||
rte_free(e->rt_free);
|
||||
|
||||
if (e->old && (!e->new || (e->new->id != e->old->id)))
|
||||
bmap_clear(&c->export_reject_map, e->old->id);
|
||||
}
|
||||
|
||||
static uint
|
||||
rte_export(struct channel *c, net *n, struct rte_export_internal *e)
|
||||
{
|
||||
e->pub.net = n->n.addr;
|
||||
|
||||
uint ra_mode = c->ra_mode;
|
||||
|
||||
struct rte_export *ep = NULL;
|
||||
|
||||
switch (ra_mode)
|
||||
{
|
||||
case RA_OPTIMAL:
|
||||
if (e->new_best == e->old_best)
|
||||
return 0;
|
||||
break;
|
||||
|
||||
e->new = e->new_best;
|
||||
e->old = e->old_best;
|
||||
/* fall through */
|
||||
case RA_ANY:
|
||||
if (!e->new && !e->old)
|
||||
break;
|
||||
|
||||
if (rt_notify_basic(c, e))
|
||||
do_rt_notify(c, &e->pub, e->refeed);
|
||||
|
||||
rte_export_finish(c, e);
|
||||
return 1;
|
||||
ep = rt_notify_basic(c, e);
|
||||
break;
|
||||
|
||||
case RA_ACCEPTED:
|
||||
if (rt_notify_accepted(c, n, e))
|
||||
do_rt_notify(c, &e->pub, e->refeed);
|
||||
|
||||
rte_export_finish(c, e);
|
||||
return 1;
|
||||
ep = rt_notify_accepted(c, e);
|
||||
break;
|
||||
|
||||
case RA_MERGED:
|
||||
if (rt_notify_merged(c, n, e))
|
||||
do_rt_notify(c, &e->pub, e->refeed);
|
||||
ep = rt_notify_merged(c, e);
|
||||
break;
|
||||
|
||||
rte_export_finish(c, e);
|
||||
return 1;
|
||||
default:
|
||||
bug("Strange channel route announcement mode");
|
||||
}
|
||||
|
||||
uint cnt = 0;
|
||||
|
||||
for (rte *ee = n->routes; ee; ee = ee->next)
|
||||
if (ep)
|
||||
{
|
||||
if (!rte_is_valid(ee))
|
||||
continue;
|
||||
|
||||
switch (ra_mode)
|
||||
{
|
||||
case RA_ANY:
|
||||
cnt++;
|
||||
e->new = ee;
|
||||
e->old = ee;
|
||||
rte_export(c, n, e);
|
||||
break;
|
||||
default:
|
||||
bug("strange export mode");
|
||||
}
|
||||
ep->net = e->net->n.addr;
|
||||
do_rt_notify(c, ep, e->refeed);
|
||||
}
|
||||
|
||||
return cnt;
|
||||
if (e->rt_free)
|
||||
rte_free(e->rt_free);
|
||||
|
||||
if (e->old && (!e->new || (e->new->id != e->old->id)))
|
||||
bmap_clear(&c->export_reject_map, e->old->id);
|
||||
}
|
||||
|
||||
|
||||
@ -930,11 +909,12 @@ rte_announce(rtable *tab, uint type, net *net, rte *new, rte *old,
|
||||
}
|
||||
|
||||
struct rte_export_internal rei = {
|
||||
.net = net,
|
||||
.new = new, .old = old,
|
||||
.new_best = new_best, .old_best = old_best,
|
||||
};
|
||||
|
||||
rte_export(c, net, &rei);
|
||||
rte_export(c, &rei);
|
||||
}
|
||||
}
|
||||
|
||||
@ -2150,6 +2130,43 @@ rt_commit(struct config *new, struct config *old)
|
||||
DBG("\tdone\n");
|
||||
}
|
||||
|
||||
static uint
|
||||
rt_feed_channel_net_internal(struct channel *c, net *nn)
|
||||
{
|
||||
struct rte_export_internal rei = {
|
||||
.net = nn,
|
||||
.new_best = nn->routes,
|
||||
.new = nn->routes,
|
||||
.refeed = 1,
|
||||
};
|
||||
|
||||
rte_update_lock();
|
||||
if (c->ra_mode == RA_ANY)
|
||||
{
|
||||
uint cnt = 0;
|
||||
for (rei.new = nn->routes; rei.new; rei.new = rei.new->next)
|
||||
if (rte_is_valid(rei.new))
|
||||
rte_export(c, &rei), cnt++;
|
||||
return cnt;
|
||||
}
|
||||
else
|
||||
{
|
||||
rte_export(c, &rei);
|
||||
return 1;
|
||||
}
|
||||
rte_update_unlock();
|
||||
}
|
||||
|
||||
void
|
||||
rt_feed_channel_net(struct channel *c, net_addr *n)
|
||||
{
|
||||
net *nn = net_find(c->table, n);
|
||||
if (!nn)
|
||||
return;
|
||||
|
||||
rt_feed_channel_net_internal(c, nn);
|
||||
}
|
||||
|
||||
/**
|
||||
* rt_feed_channel - advertise all routes to a channel
|
||||
* @c: channel to be fed
|
||||
@ -2181,14 +2198,7 @@ rt_feed_channel(struct channel *c)
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct rte_export_internal rei = {
|
||||
.new_best = n->routes,
|
||||
.refeed = 1,
|
||||
};
|
||||
|
||||
rte_update_lock();
|
||||
max_feed -= rte_export(c, n, &rei);
|
||||
rte_update_unlock();
|
||||
max_feed -= rt_feed_channel_net_internal(c, n);
|
||||
}
|
||||
FIB_ITERATE_END;
|
||||
|
||||
@ -2196,22 +2206,6 @@ rt_feed_channel(struct channel *c)
|
||||
return 1;
|
||||
}
|
||||
|
||||
void rt_feed_channel_net(struct channel *c, net_addr *n)
|
||||
{
|
||||
net *nn = net_find(c->table, n);
|
||||
if (!nn)
|
||||
return;
|
||||
|
||||
struct rte_export_internal rei = {
|
||||
.new_best = nn->routes,
|
||||
.refeed = 1,
|
||||
};
|
||||
|
||||
rte_update_lock();
|
||||
rte_export(c, nn, &rei);
|
||||
rte_update_unlock();
|
||||
}
|
||||
|
||||
/**
|
||||
* rt_feed_baby_abort - abort protocol feeding
|
||||
* @c: channel
|
||||
|
||||
Loading…
Reference in New Issue
Block a user