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Fixes subtle bug in temporary attribute handling

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In some cases, export filter accessed attributes of a different route.
This commit is contained in:
Ondrej Zajicek 2015-06-04 11:35:26 +02:00
parent 78a2cc289f
commit db027a41d4
1 changed files with 20 additions and 29 deletions
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49
nest/rt-table.c
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@ -208,12 +208,10 @@ export_filter(struct announce_hook *ah, rte *rt0, rte **rt_free, ea_list **tmpa,
rt = rt0; rt = rt0;
*rt_free = NULL; *rt_free = NULL;
/* If called does not care for eattrs, we prepare one internally */
if (!tmpa) if (!tmpa)
{ tmpa = &tmpb;
tmpb = make_tmp_attrs(rt, rte_update_pool);
tmpa = &tmpb; *tmpa = make_tmp_attrs(rt, rte_update_pool);
}
v = p->import_control ? p->import_control(p, &rt, tmpa, rte_update_pool) : 0; v = p->import_control ? p->import_control(p, &rt, tmpa, rte_update_pool) : 0;
if (v < 0) if (v < 0)
@ -347,7 +345,7 @@ do_rt_notify(struct announce_hook *ah, net *net, rte *new, rte *old, ea_list *tm
} }
static void static void
rt_notify_basic(struct announce_hook *ah, net *net, rte *new0, rte *old0, ea_list *tmpa, int refeed) rt_notify_basic(struct announce_hook *ah, net *net, rte *new0, rte *old0, int refeed)
{ {
struct proto *p = ah->proto; struct proto *p = ah->proto;
struct proto_stats *stats = ah->stats; struct proto_stats *stats = ah->stats;
@ -356,6 +354,7 @@ rt_notify_basic(struct announce_hook *ah, net *net, rte *new0, rte *old0, ea_lis
rte *old = old0; rte *old = old0;
rte *new_free = NULL; rte *new_free = NULL;
rte *old_free = NULL; rte *old_free = NULL;
ea_list *tmpa = NULL;
if (new) if (new)
stats->exp_updates_received++; stats->exp_updates_received++;
@ -419,17 +418,17 @@ rt_notify_basic(struct announce_hook *ah, net *net, rte *new0, rte *old0, ea_lis
} }
static void static void
rt_notify_accepted(struct announce_hook *ah, net *net, rte *new_changed, rte *old_changed, rte *before_old, rt_notify_accepted(struct announce_hook *ah, net *net, rte *new_changed, rte *old_changed, rte *before_old, int feed)
ea_list *tmpa, int feed)
{ {
// struct proto *p = ah->proto; // struct proto *p = ah->proto;
struct proto_stats *stats = ah->stats; struct proto_stats *stats = ah->stats;
rte *r;
rte *new_best = NULL; rte *new_best = NULL;
rte *old_best = NULL; rte *old_best = NULL;
rte *new_free = NULL; rte *new_free = NULL;
rte *old_free = NULL; rte *old_free = NULL;
rte *r; ea_list *tmpa = NULL;
/* Used to track whether we met old_changed position. If before_old is NULL /* Used to track whether we met old_changed position. If before_old is NULL
old_changed was the first and we met it implicitly before current best route. */ old_changed was the first and we met it implicitly before current best route. */
@ -543,7 +542,6 @@ rt_notify_accepted(struct announce_hook *ah, net *net, rte *new_changed, rte *ol
* @net: network in question * @net: network in question
* @new: the new route to be announced * @new: the new route to be announced
* @old: the previous route for the same network * @old: the previous route for the same network
* @tmpa: a list of temporary attributes belonging to the new route
* *
* This function gets a routing table update and announces it * This function gets a routing table update and announces it
* to all protocols that acccepts given type of route announcement * to all protocols that acccepts given type of route announcement
@ -566,7 +564,7 @@ rt_notify_accepted(struct announce_hook *ah, net *net, rte *new_changed, rte *ol
* the protocol gets called. * the protocol gets called.
*/ */
static void static void
rte_announce(rtable *tab, unsigned type, net *net, rte *new, rte *old, rte *before_old, ea_list *tmpa) rte_announce(rtable *tab, unsigned type, net *net, rte *new, rte *old, rte *before_old)
{ {
if (!rte_is_valid(old)) if (!rte_is_valid(old))
old = before_old = NULL; old = before_old = NULL;
@ -594,9 +592,9 @@ rte_announce(rtable *tab, unsigned type, net *net, rte *new, rte *old, rte *befo
ASSERT(a->proto->export_state != ES_DOWN); ASSERT(a->proto->export_state != ES_DOWN);
if (a->proto->accept_ra_types == type) if (a->proto->accept_ra_types == type)
if (type == RA_ACCEPTED) if (type == RA_ACCEPTED)
rt_notify_accepted(a, net, new, old, before_old, tmpa, 0); rt_notify_accepted(a, net, new, old, before_old, 0);
else else
rt_notify_basic(a, net, new, old, tmpa, 0); rt_notify_basic(a, net, new, old, 0);
} }
} }
@ -659,7 +657,7 @@ rte_same(rte *x, rte *y)
static inline int rte_is_ok(rte *e) { return e && !rte_is_filtered(e); } static inline int rte_is_ok(rte *e) { return e && !rte_is_filtered(e); }
static void static void
rte_recalculate(struct announce_hook *ah, net *net, rte *new, ea_list *tmpa, struct rte_src *src) rte_recalculate(struct announce_hook *ah, net *net, rte *new, struct rte_src *src)
{ {
struct proto *p = ah->proto; struct proto *p = ah->proto;
struct rtable *table = ah->table; struct rtable *table = ah->table;
@ -900,11 +898,11 @@ rte_recalculate(struct announce_hook *ah, net *net, rte *new, ea_list *tmpa, str
} }
/* Propagate the route change */ /* Propagate the route change */
rte_announce(table, RA_ANY, net, new, old, NULL, tmpa); rte_announce(table, RA_ANY, net, new, old, NULL);
if (net->routes != old_best) if (net->routes != old_best)
rte_announce(table, RA_OPTIMAL, net, net->routes, old_best, NULL, tmpa); rte_announce(table, RA_OPTIMAL, net, net->routes, old_best, NULL);
if (table->config->sorted) if (table->config->sorted)
rte_announce(table, RA_ACCEPTED, net, new, old, before_old, tmpa); rte_announce(table, RA_ACCEPTED, net, new, old, before_old);
if (!net->routes && if (!net->routes &&
(table->gc_counter++ >= table->config->gc_max_ops) && (table->gc_counter++ >= table->config->gc_max_ops) &&
@ -1069,7 +1067,7 @@ rte_update2(struct announce_hook *ah, net *net, rte *new, struct rte_src *src)
recalc: recalc:
rte_hide_dummy_routes(net, &dummy); rte_hide_dummy_routes(net, &dummy);
rte_recalculate(ah, net, new, tmpa, src); rte_recalculate(ah, net, new, src);
rte_unhide_dummy_routes(net, &dummy); rte_unhide_dummy_routes(net, &dummy);
rte_update_unlock(); rte_update_unlock();
return; return;
@ -1077,7 +1075,6 @@ rte_update2(struct announce_hook *ah, net *net, rte *new, struct rte_src *src)
drop: drop:
rte_free(new); rte_free(new);
new = NULL; new = NULL;
tmpa = NULL;
goto recalc; goto recalc;
} }
@ -1086,11 +1083,8 @@ rte_update2(struct announce_hook *ah, net *net, rte *new, struct rte_src *src)
static inline void static inline void
rte_announce_i(rtable *tab, unsigned type, net *n, rte *new, rte *old) rte_announce_i(rtable *tab, unsigned type, net *n, rte *new, rte *old)
{ {
ea_list *tmpa;
rte_update_lock(); rte_update_lock();
tmpa = make_tmp_attrs(new, rte_update_pool); rte_announce(tab, type, n, new, old, NULL);
rte_announce(tab, type, n, new, old, NULL, tmpa);
rte_update_unlock(); rte_update_unlock();
} }
@ -1098,7 +1092,7 @@ void
rte_discard(rtable *t, rte *old) /* Non-filtered route deletion, used during garbage collection */ rte_discard(rtable *t, rte *old) /* Non-filtered route deletion, used during garbage collection */
{ {
rte_update_lock(); rte_update_lock();
rte_recalculate(old->sender, old->net, NULL, NULL, old->attrs->src); rte_recalculate(old->sender, old->net, NULL, old->attrs->src);
rte_update_unlock(); rte_update_unlock();
} }
@ -1758,14 +1752,11 @@ rt_commit(struct config *new, struct config *old)
static inline void static inline void
do_feed_baby(struct proto *p, int type, struct announce_hook *h, net *n, rte *e) do_feed_baby(struct proto *p, int type, struct announce_hook *h, net *n, rte *e)
{ {
ea_list *tmpa;
rte_update_lock(); rte_update_lock();
tmpa = make_tmp_attrs(e, rte_update_pool);
if (type == RA_ACCEPTED) if (type == RA_ACCEPTED)
rt_notify_accepted(h, n, e, NULL, NULL, tmpa, p->refeeding ? 2 : 1); rt_notify_accepted(h, n, e, NULL, NULL, p->refeeding ? 2 : 1);
else else
rt_notify_basic(h, n, e, p->refeeding ? e : NULL, tmpa, p->refeeding); rt_notify_basic(h, n, e, p->refeeding ? e : NULL, p->refeeding);
rte_update_unlock(); rte_update_unlock();
} }