diff options
Diffstat (limited to 'nest/rt-table.c')
| -rw-r--r-- | nest/rt-table.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/nest/rt-table.c b/nest/rt-table.c index 83f0e713..93075c7b 100644 --- a/nest/rt-table.c +++ b/nest/rt-table.c @@ -1295,6 +1295,28 @@ rte_discard(rte *old) /* Non-filtered route deletion, used during garbage collec rte_update_unlock(); } +/* Modify existing route by protocol hook, used for long-lived graceful restart */ +static inline void +rte_modify(rte *old) +{ + rte_update_lock(); + + rte *new = old->sender->proto->rte_modify(old, rte_update_pool); + if (new != old) + { + if (new) + { + if (!rta_is_cached(new->attrs)) + new->attrs = rta_lookup(new->attrs); + new->flags = (old->flags & ~REF_MODIFY) | REF_COW; + } + + rte_recalculate(old->sender, old->net, new, old->attrs->src); + } + + rte_update_unlock(); +} + /* Check rtable for best route to given net whether it would be exported do p */ int rt_examine(rtable *t, ip_addr prefix, int pxlen, struct proto *p, struct filter *filter) @@ -1385,6 +1407,29 @@ rt_refresh_end(rtable *t, struct announce_hook *ah) rt_schedule_prune(t); } +void +rt_modify_stale(rtable *t, struct announce_hook *ah) +{ + int prune = 0; + net *n; + rte *e; + + FIB_WALK(&t->fib, fn) + { + n = (net *) fn; + for (e = n->routes; e; e = e->next) + if ((e->sender == ah) && (e->flags & REF_STALE) && !(e->flags & REF_FILTERED)) + { + e->flags |= REF_MODIFY; + prune = 1; + } + } + FIB_WALK_END; + + if (prune) + rt_schedule_prune(t); +} + /** * rte_dump - dump a route @@ -1604,6 +1649,7 @@ again: rescan: for (e=n->routes; e; e=e->next) + { if (e->sender->proto->flushing || (e->flags & REF_DISCARD)) { if (*limit <= 0) @@ -1617,6 +1663,22 @@ again: goto rescan; } + + if (e->flags & REF_MODIFY) + { + if (*limit <= 0) + { + FIB_ITERATE_PUT(fit, fn); + return 0; + } + + rte_modify(e); + (*limit)--; + + goto rescan; + } + } + if (!n->routes) /* Orphaned FIB entry */ { FIB_ITERATE_PUT(fit, fn); |