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| author | Sabrina Dubroca <sd@queasysnail.net> | 2018-10-12 17:22:47 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-10-16 08:18:27 +0300 |
| commit | f547fac624be53ad8b07e9ebca7654a7827ba61b (patch) | |
| tree | e8d39c6b9c62085154052363f89245575ded7282 /include/net/ip6_fib.h | |
| parent | 64bd9c8135751b561f27edaaffe93d07093f81af (diff) | |
| download | linux-f547fac624be53ad8b07e9ebca7654a7827ba61b.tar.xz | |
ipv6: rate-limit probes for neighbourless routes
When commit 270972554c91 ("[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 2152caea7196 ("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: 2152caea7196 ("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>
Diffstat (limited to 'include/net/ip6_fib.h')
| -rw-r--r-- | include/net/ip6_fib.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h index 3d4930528db0..2d31e22babd8 100644 --- a/include/net/ip6_fib.h +++ b/include/net/ip6_fib.h @@ -159,6 +159,10 @@ struct fib6_info { struct rt6_info * __percpu *rt6i_pcpu; struct rt6_exception_bucket __rcu *rt6i_exception_bucket; +#ifdef CONFIG_IPV6_ROUTER_PREF + unsigned long last_probe; +#endif + u32 fib6_metric; u8 fib6_protocol; u8 fib6_type; |