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ospfd, ospf6d: perform GR consistency check only when necessary

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The GR code should check for topology changes only upon the receipt
of Router-LSAs and Network-LSAs. Other LSAs types don't affect the
topology as far as a restarting router is concerned.

This optimization reduces unnecessary computations when the
restarting router receives thousands of inter-area LSAs or external
LSAs while coming back up.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
This commit is contained in:
Renato Westphal 2023-03-01 17:31:56 -03:00
parent 3d2533ed58
commit cb1f47c2eb
2 changed files with 12 additions and 4 deletions
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5
ospf6d/ospf6_flood.c
View File

@ -1105,9 +1105,12 @@ void ospf6_receive_lsa(struct ospf6_neighbor *from,
&new->refresh);
}
/* GR: check for network topology change. */
struct ospf6 *ospf6 = from->ospf6_if->area->ospf6;
struct ospf6_area *area = from->ospf6_if->area;
if (ospf6->gr_info.restart_in_progress)
if (ospf6->gr_info.restart_in_progress &&
(new->header->type == ntohs(OSPF6_LSTYPE_ROUTER) ||
new->header->type == ntohs(OSPF6_LSTYPE_NETWORK)))
ospf6_gr_check_lsdb_consistency(ospf6, area);
return;

11
ospfd/ospf_packet.c
View File

@ -2102,6 +2102,14 @@ static void ospf_ls_upd(struct ospf *ospf, struct ip *iph,
if (ospf_flood(oi->ospf, nbr, current, lsa)
< 0) /* Trap NSSA later. */
DISCARD_LSA(lsa, 5);
/* GR: check for network topology change. */
if (ospf->gr_info.restart_in_progress &&
((lsa->data->type == OSPF_ROUTER_LSA ||
lsa->data->type == OSPF_NETWORK_LSA)))
ospf_gr_check_lsdb_consistency(oi->ospf,
oi->area);
continue;
}
@ -2214,9 +2222,6 @@ static void ospf_ls_upd(struct ospf *ospf, struct ip *iph,
assert(listcount(lsas) == 0);
list_delete(&lsas);
if (ospf->gr_info.restart_in_progress)
ospf_gr_check_lsdb_consistency(oi->ospf, oi->area);
}
/* OSPF Link State Acknowledgment message read -- RFC2328 Section 13.7. */