[uml-devel] Re: [BUG!?] Re: [uml-user] TUNSETIFF failed, errno = 16SIOCSIFFLAGS: Device or resource busy

[Nix <ni...@es...>]

On Wed, 16 Jun 2004, roland stipulated:
> hi!
> 
>> > When I start up my UML, the networking works fine.  If I bring down my
>> > interface and attempt to bring it back up again, I get the following
>> > message.
>> >
>> > # ifconfig eth0 down
>> > # ifconfig eth0 up
>> > TUNSETIFF failed, errno = 16SIOCSIFFLAGS: Device or resource busy
> 
>> ... which it is: it's a component of the bridge, and doesn't have its
>> own independent existence anymore.
> 
> yes - and that is why we should somewhat call it a "bug" - because a
> uml user indeed is allowed to bring down/up eth0, but he (usually)
> isn't allowed to do something outside the uml.

This is just the analogue of the way in which taking a link down from
one end will automatically take it down at the other end, too.

>> Either bring down br0, or bring down the UML side of the link.
>> that is a workaround , not a solution.
> i think UML needs some fix to handle tun/tap via bridge appropriately.

Er, it works now. :)

-- 
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