netdev - Re: network regression: cannot rename netdev twice

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Message-ID: <10120.1328731572@turing-police.cc.vt.edu>
Date:	Wed, 08 Feb 2012 15:06:12 -0500
From:	Valdis.Kletnieks@...edu
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Jiri Slaby <jslaby@...e.cz>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg KH <greg@...ah.com>, LKML <linux-kernel@...r.kernel.org>,
	ML netdev <netdev@...r.kernel.org>
Subject: Re: network regression: cannot rename netdev twice

On Wed, 08 Feb 2012 11:57:18 +0100, Kay Sievers said:
> On Wed, Feb 8, 2012 at 07:42,  <Valdis.Kletnieks@...edu> wrote:

> > Or is this sort of thing in /etc/udev/rules.d/70-persistent-net.rules
> > SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:25:90:0b:f2:80", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
> > what you are trying to move to, and my systems are already onboard and
> > I should just move along, nothing to see here? ;)
>
> Yeah, that's what we did in the past. It works fine if you never have
> to swap names like eth0 and eth1, with need to free one of the the
> names with a temporary rename.

Well, if I had my druthers, I'd stick name="net-mgt", "net-pub", and "net-10g"
in the udev rules, and not care about 1/2/3 and race conditions, because
meaningful names are easier to not screw up (just last week found a system that
had eth1 and eth2 reversed in some iptables rules, wouldn't have happened if
they were -mgt and -pub).

Only thing stopping me is getting iptables to accept '-i net-10g', and the
distro /etc/sysconfig/network scripts like ifup and ifdown playing nice....

So it sounds like what I want as a sysadmin is the same thing you want
as a maintainer...

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