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Nest: Do not compare rte.flags during rte_update()

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Route flags are mosty internal state of rtable, they are not significant
to whether a route has changed. With the old code, all routes received as
a part of enhanced route refresh are always re-announced to other peers
due to change in REF_STALE.
This commit is contained in:
Ondrej Zajicek (work) 2019-02-22 02:16:39 +01:00
parent ae294cc2d0
commit 93af78d2d2
1 changed files with 15 additions and 3 deletions
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18
nest/rt-table.c
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@ -1007,12 +1007,13 @@ rte_free_quick(rte *e)
static int
rte_same(rte *x, rte *y)
{
/* rte.flags are not checked, as they are mostly internal to rtable */
return
x->attrs == y->attrs &&
x->flags == y->flags &&
x->pflags == y->pflags &&
x->pref == y->pref &&
(!x->attrs->src->proto->rte_same || x->attrs->src->proto->rte_same(x, y));
(!x->attrs->src->proto->rte_same || x->attrs->src->proto->rte_same(x, y)) &&
rte_is_filtered(x) == rte_is_filtered(y);
}
static inline int rte_is_ok(rte *e) { return e && !rte_is_filtered(e); }
@ -1056,7 +1057,9 @@ rte_recalculate(struct channel *c, net *net, rte *new, struct rte_src *src)
if (new && rte_same(old, new))
{
/* No changes, ignore the new route */
/* No changes, ignore the new route and refresh the old one */
old->flags &= ~(REF_STALE | REF_DISCARD | REF_MODIFY);
if (!rte_is_filtered(new))
{
@ -2362,7 +2365,16 @@ rte_update_in(struct channel *c, const net_addr *n, rte *new, struct rte_src *sr
if (old->attrs->src == src)
{
if (new && rte_same(old, new))
{
/* Refresh the old rte, continue with update to main rtable */
if (old->flags & (REF_STALE | REF_DISCARD | REF_MODIFY))
{
old->flags &= ~(REF_STALE | REF_DISCARD | REF_MODIFY);
return 1;
}
goto drop_update;
}
/* Remove the old rte */
*pos = old->next;