netdev - Re: RFC: Patch to add support for multiple multicast routing tables.

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Message-ID: <20080624222807.3a9918d1@speedy>
Date:	Tue, 24 Jun 2008 22:28:07 -0700
From:	Stephen Hemminger <stephen.hemminger@...tta.com>
To:	Ben Greear <greearb@...delatech.com>
Cc:	NetDev <netdev@...r.kernel.org>
Subject: Re: RFC:  Patch to add support for multiple multicast routing
 tables.

On Tue, 24 Jun 2008 17:50:51 -0700
Ben Greear <greearb@...delatech.com> wrote:

> In order to run multiple Xorp instances and treat different groups of
> interfaces as being in their own virtual router, I had to update the
> ipv4/ipmr.c logic to support multiple routing tables.
> 
> I will be attempting to push the cooresponding xorp changes to it's
> maintainers if this is accepted into the kernel.  It should be fully
> backwards compatible with existing xorp and other multicast
> routing tools.  It does change the procfs output slightly, adding
> a TableId column.
> 
> The original patch was written by me, and then Patrick McHardy
> fixed up my cruft and made it much smaller and with better locking.
> I then fixed a few bugs I found while testing with my modified xorp.
> 
> The attached patch is against 2.6.25.4 + hacks.  It has a few rejects 
> against 2.6.26.rc7,
> but I will fix those sooner rather than later if the patch is otherwise 
> deemed
> worthy.
> 
> Please let me know if this stands a chance of inclusion.
> 
> Thanks,
> Ben

Ben private ioctl's make it hard to handle 32bit/64bit compatiablity,
and routing is better managed through rtnetlink. Doesn't XORP do
netlink?
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