netdev - Re: [PATCH 1/1] UDEV - Add 'udevlom' command line param to start

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Message-ID: <AANLkTin_rswTZn5RxH375u4xsoftQzMSPMRfUvy77fdX@mail.gmail.com>
Date:	Mon, 8 Nov 2010 14:12:56 +0530
From:	Sujit K M <sjt.kar@...il.com>
To:	Matt Domsch <Matt_Domsch@...l.com>
Cc:	Greg KH <greg@...ah.com>, "K, Narendra" <Narendra_K@...l.com>,
	"linux-hotplug@...r.kernel.org" <linux-hotplug@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Hargrave, Jordan" <Jordan_Hargrave@...l.com>,
	"Rose, Charles" <Charles_Rose@...l.com>
Subject: Re: [PATCH 1/1] UDEV - Add 'udevlom' command line param to start_udev

> At Linux Plumbers Conference today, this problem space was discussed
> once again, and I believe concensus on approach was reached.  Here
> goes:

Was the patch a starting point for the discussion.

> * If a 70-persistent-net.rules file sets a name, honor that.  This
>  preserves existing installs.
>
> * If BIOS provides indexes for onboard devices, honor that.
> ** Rename onboard NICs "lom[1-N]" as BIOS reports (# matches chassis labels)
> ** No rename for all others "ethX" (no change for NICs in PCI slots/USB/others)
>
> * If neither are true, do not rename at all.

I would like to know what is the difference in the nomenclature for this.

>
> * Implementation will be:
> ** Udev rules to be included in upstream udev will read the index
>   value from sysfs (provided by SMBIOS 2.6 info on kernels >= 2.6.36,
>   PCI DSM info at some future point) if present, and rename LOMs
>   based on that index value.  Distros will use these rules by default
>   (Ubuntu and Fedora maintainers on board with the concept; I have
>   not spoken with other distros yet.)
> ** Legacy distros with older udev rules will invoke biosdevname on
>   kernels < 2.6.36 to get the same information, if present, and will
>   rename LOMs based on index value.

How will you manage these scenarios.
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