ipv6: rate-limit probes for neighbourless routes
When commit 27097255 ("[IPV6]: ROUTE: Add Router Reachability Probing (RFC4191).") introduced router probing, the rt6_probe() function required that a neighbour entry existed. This neighbour entry is used to record the timestamp of the last probe via the ->updated field. Later, commit 2152caea ("ipv6: Do not depend on rt->n in rt6_probe().") removed the requirement for a neighbour entry. Neighbourless routes skip the interval check and are not rate-limited. This patch adds rate-limiting for neighbourless routes, by recording the timestamp of the last probe in the fib6_info itself. Fixes: 2152caea ("ipv6: Do not depend on rt->n in rt6_probe().") Signed-off-by:Sabrina Dubroca <sd@queasysnail.net> Reviewed-by:
Stefano Brivio <sbrivio@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
64bd9c81
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