tree 654235ceccd1c3f9dfbb7422ebe09b21544325d6
parent 7a71ed899e77cc822abb863e24a422dcf7e9fa33
author David S. Miller <davem@davemloft.net> 1297294607 -0800
committer David S. Miller <davem@davemloft.net> 1297373370 -0800

inetpeer: Add redirect and PMTU discovery cached info.

Validity of the cached PMTU information is indicated by it's
expiration value being non-zero, just as per dst->expires.

The scheme we will use is that we will remember the pre-ICMP value
held in the metrics or route entry, and then at expiration time
we will restore that value.

In this way PMTU expiration does not kill off the cached route as is
done currently.

Redirect information is permanent, or at least until another redirect
is received.

Signed-off-by: David S. Miller <davem@davemloft.net>