netdev - RE: [PATCH] udev: create empty regular files to represent netinterfaces

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Date:	Fri, 30 Oct 2009 22:23:57 +0530
From:	<Narendra_K@...l.com>
To:	<dannf@...nf.org>
Cc:	<greg@...ah.com>, <Matt_Domsch@...l.com>, <kay.sievers@...y.org>,
	<linux-hotplug@...r.kernel.org>, <netdev@...r.kernel.org>,
	<Jordan_Hargrave@...l.com>, <Charles_Rose@...l.com>,
	<bhutchings@...arflare.com>
Subject: RE: [PATCH] udev: create empty regular files to represent netinterfaces


>> >There are two issues, which really seem distinct to me.
>> >
>> >Users expect eth0 to map to first-onboard-nic. That's an installer 
>> >issue (since the BIOS can already export this info) and I 
>agree that 
>> >if we want to "fix" that, we should fix it there.
>> >
>> 
>> I agree that installers have to be fixed in the sense that 
>they can be 
>> told to find the right interface. But, they expect determinism and 
>> depend on "eth0 to map to first-onboard-nic". Installer is 
>one of the 
>> applications that is affected by this and needs user 
>intervention, if 
>> it is not told about the right interface. I discussed 
>installer as it 
>> is so much part of a user experience.
>
>Right, but couldn't the installer do the work of scanning the 
>SMBIOS to figure out which nics are onboard, and reorder the 
>'eth*' names such that these are first? This state could then 
>be written out as udev rules so that they persist across reboots.
>

I suppose, with udev loading modules, the rules generated at runtime
could run into the problem of duplicate names, if names are reordered in
the kernel namespace. (I.e the eth* namespace). Hence idea of an
alternate namespace.

With regards,
Narendra K
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