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| author | Steffen Klassert <steffen.klassert@secunet.com> | 2012-10-17 21:17:44 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-10-18 15:34:30 -0400 |
| commit | 13d82bf50dce632355fcccafa4fe44a9b5e706d8 (patch) | |
| tree | e26ac35082d33767ad157ababda04bcdf7c6d83f | |
| parent | 18c22a03a2187bcbda7d3a7fa1061584a6348e7b (diff) | |
| download | linux-13d82bf50dce632355fcccafa4fe44a9b5e706d8.tar.bz2 | |
ipv4: Fix flushing of cached routing informations
Currently we can not flush cached pmtu/redirect informations via
the ipv4_sysctl_rtcache_flush sysctl. We need to check the rt_genid
of the old route and reset the nh exeption if the old route is
expired when we bind a new route to a nh exeption.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/route.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 432f4bb77238..a8c651216fa6 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1163,8 +1163,12 @@ static bool rt_bind_exception(struct rtable *rt, struct fib_nh_exception *fnhe, spin_lock_bh(&fnhe_lock); if (daddr == fnhe->fnhe_daddr) { - struct rtable *orig; - + struct rtable *orig = rcu_dereference(fnhe->fnhe_rth); + if (orig && rt_is_expired(orig)) { + fnhe->fnhe_gw = 0; + fnhe->fnhe_pmtu = 0; + fnhe->fnhe_expires = 0; + } if (fnhe->fnhe_pmtu) { unsigned long expires = fnhe->fnhe_expires; unsigned long diff = expires - jiffies; @@ -1181,7 +1185,6 @@ static bool rt_bind_exception(struct rtable *rt, struct fib_nh_exception *fnhe, } else if (!rt->rt_gateway) rt->rt_gateway = daddr; - orig = rcu_dereference(fnhe->fnhe_rth); rcu_assign_pointer(fnhe->fnhe_rth, rt); if (orig) rt_free(orig); |