CARP behaviour

[Andre Oppermann]

Yar Tikhiy wrote:
> On Sat, Mar 03, 2007 at 12:03:05AM +0000, Bruce M Simpson wrote:
>> During testing of M_PROMISC I noticed a couple of issues with our CARP.
>>
>> 1. carp doesn't seem to maintain input/output statistics on its ifnet.
> 
> This should be OK.  A carp(4) interface is just a place for CARP
> settings to live.  No real traffic passes through it.
> 
>> 2. carp doesn't seem to detect that the underlying route to the subnet
>>   its address is exposed on changed to another interface.
> 
> I seem to recollect that I ran into this issue, too.  Of course,
> it's a bug.  CARP apparently caches the old route forever.  It
> should track such a change if it doesn't yet.  We have a sort of
> notification for the event, don't we?  The userland has the routing
> socket for that, but I don't remember about the kernel.

We shouldn't cache route pointers anywhere anymore.  It has been completely
removed from the PCBs and things like gif and others.

> Thank you for paying attention to that!

-- 
Andre