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Export table: Delay freeing of old stored route.

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This is needed to provide the protocols the full old route after filters
when export table is enabled.
This commit is contained in:
Maria Matejka
2021-03-20 21:16:12 +01:00
parent 8216ec3027
commit cee0cd148c
2 changed files with 34 additions and 26 deletions
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58
nest/rt-table.c
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@@ -333,6 +333,26 @@ rte_cow_rta(rte *r, linpool *lp)
return r;
}
/**
* rte_free - delete a &rte
* @e: &rte to be deleted
*
* rte_free() deletes the given &rte from the routing table it's linked to.
*/
void
rte_free(rte *e)
{
if (rta_is_cached(e->attrs))
rta_free(e->attrs);
sl_free(rte_slab, e);
}
static inline void
rte_free_quick(rte *e)
{
rta_free(e->attrs);
sl_free(rte_slab, e);
}
/**
* rte_init_tmp_attrs - initialize temporary ea_list for route
@@ -661,8 +681,14 @@ do_rt_notify(struct channel *c, net *net, rte *new, rte *old, int refeed)
}
/* Apply export table */
if (c->out_table && !rte_update_out(c, net->n.addr, new, old, refeed))
return;
struct rte *old_exported = NULL;
if (c->out_table)
{
if (!rte_update_out(c, net->n.addr, new, old, &old_exported, refeed))
return;
}
else if (c->out_filter == FILTER_ACCEPT)
old_exported = old;
if (new)
stats->exp_updates_accepted++;
@@ -692,6 +718,9 @@ do_rt_notify(struct channel *c, net *net, rte *new, rte *old, int refeed)
}
p->rt_notify(p, c, net, new, old);
if (c->out_table && old_exported)
rte_free_quick(old_exported);
}
static void
@@ -1044,27 +1073,6 @@ rte_validate(rte *e)
return 1;
}
/**
* rte_free - delete a &rte
* @e: &rte to be deleted
*
* rte_free() deletes the given &rte from the routing table it's linked to.
*/
void
rte_free(rte *e)
{
if (rta_is_cached(e->attrs))
rta_free(e->attrs);
sl_free(rte_slab, e);
}
static inline void
rte_free_quick(rte *e)
{
rta_free(e->attrs);
sl_free(rte_slab, e);
}
static int
rte_same(rte *x, rte *y)
{
@@ -2762,7 +2770,7 @@ again:
*/
int
rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int refeed)
rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, rte **old_exported, int refeed)
{
struct rtable *tab = c->out_table;
struct rte_src *src;
@@ -2808,7 +2816,7 @@ rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int re
/* Remove the old rte */
*pos = old->next;
rte_free_quick(old);
*old_exported = old;
tab->rt_count--;
break;