linux-kernel - Re: namespace support requires network modules to say "GPL"

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Message-ID: <m18x4axrx2.fsf@ebiederm.dsl.xmission.com>
Date:	Tue, 04 Dec 2007 10:59:05 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Ben Greear <greearb@...delatech.com>
Cc:	Patrick McHardy <kaber@...sh.net>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Mark Lord <lkml@....ca>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, containers@...ts.osdl.org,
	David Miller <davem@...emloft.net>
Subject: Re: namespace support requires network modules to say "GPL"

Ben Greear <greearb@...delatech.com> writes:

>> Regardless of infringement it is incompatible with a complete network
>> namespace implementation.  Further it sounds like the module you are
>> describing defines a kernel ABI without being merged and hopes that
>> ABI will still be supportable in the future.  Honestly I think doing so
>> is horrible code maintenance policy.
>>
> I don't mind if the ABI changes, so long as I can still use something similar.

It has occurred to me that I am seeing an implication here that may in fact not
exist.

My impression of dev_get_by_xxxx is that the function is only able to be used
sanely when being part of the definition of a kernel/userspace interface.  With
the further assumption on my part that you need to define a new instance of
dev_get_by_xxxx 

It has just occurred to me that it is possible to reuse the SIOCBRADDIF
and SIOCBRDELIF for that same purpose without defining a new kernel/userspace
interface.

What and how are you using dev_get_by_xxx?

Eric
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