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SubjectRe: [patch] 2.4 version of my duplicate IP and MAC detection patch
On Thu, Sep 21, 2000 at 04:09:41PM -0700, Marc MERLIN wrote:
> I updated my duplicate IP detection patch to work with 2.4.
>
> I announced the 2.2 version here last year, and several people expressed
> interest in it, but it never made it into the kernel unfortunately. I asked
> a few times and eventually gave up as I didn't want to appear overly pushy
> and it got included in the kernels that I use (kernels from VA).
>
> I didn't receive any negative comments, except for Alexey who believed the
> check should be done in user space.

You added a linear IP search to fast path ARP processing. The people running
thousands of IP aliases will surely love you. You could at least use the
ip_route_input output instead that arp_rcv computes anyways and check
for RTN_LOCAL.

BTW, the idea of doing it in user space is not to have a daemon running
but just to do DAD once when you configure the ip address, like most
other OSes do [as easily done with arping and a small script, see ipcfg
from iproute2].

Overall it looks like bloat.

-Andi
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