Re: swapping interface names (again)

["Alexander E. Patrakov" <patrakov@ums.usu.ru>]

juuso.alasuutari@tamperelainen.org wrote:
> I accidentally only sent my message to Marco. Here it is for the list also:
> 
> Quoting Marco d'Itri <md@Linux.IT>:
> 
>> On Jun 24, MS Colclough <m.s.colclough@bham.ac.uk> wrote:
>>
>>> imply that the whole process can be done by some udev rules that run
>>> at boot time?  If so, how please?
>> Look at the Debian package for a simple script which generates rules on
>> demand.
> 
> It's of course easy to write a script that creates something like
> z99-network.rules. But what should it contain?
> 
> If I have eth0 and eth1, and want to swap their names, I first need to rename
> them to e.g. tempeth0 and tempeth1, and then to eth1 and eth0. But what kind of
> rule would recognise when all temporary names are created and apply the final
> ones?

Don't look at the Debian package. It is very likely to contain this problem, 
because for my single-card setup, Debian udev 0.093-1 writes:

# This file was automatically generated by the /lib/udev/write_net_rules
# program, probably run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single line.

# PCI device 10ec:8139 (8139too)
SUBSYSTEM="net", DRIVER="?*", SYSFS{address}="00:e0:4c:7c:4a:d3", NAME="eth0"

Of course this will break if I a new card in such a way (read: PCI slot) so that 
without this rule it becomes eth0. Then this rule will attempt to rename my old 
card to eth0, and boom... there is already eth0.

And I don't know any solution that allows eth%d as a final name.

-- 
Alexander E. Patrakov

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