Re: [PATCH] Change MAC without bringing interface down

["David S. Miller" <davem@xxxxxxxxxx>]

On Mon, 18 Aug 2003 12:13:12 +0300
Tommi Virtanen <tv@xxxxxxxxxx> wrote:

>       Here's a patch that
> 
>       1. makes eth_header_cache_update also update the source MAC in
>          hh_cache.
> 
>       2. adds a NETDEV_CHANGEADDR notifier in net/core/neighbour.c
>          that walks through all the neighbour entries and updates
>          the hh_cache's for all the neighbour entries related to
>          given device.
> 
>       3. adds neighbour_init() to allow registration of said notifier.

I would suggest to fix this by instead flushing the hh
entries (just like neigh_destroy() does).

This way, we don't have to fix up every single header cache
implementation, that's painful :(