linux-kernel - Re: network regression: cannot rename netdev twice

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Message-ID: <CAPXgP1371fgmaP3ecxsDJ2BmJrOS6kUP95G1BHe6deBPk5FVCQ@mail.gmail.com>
Date:	Tue, 31 Jan 2012 12:58:46 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	Jiri Slaby <jslaby@...e.cz>
Cc:	"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 Tue, Jan 31, 2012 at 12:17, Jiri Slaby <jslaby@...e.cz> wrote:
> On 01/31/2012 12:13 PM, Kay Sievers wrote:

>> This is a command sequence you type manually?
>
> Yea, and it is working with 3.3.0-rc1-next-20120124_64+. Not with
> 3.3.0-rc1-next-20120131_64+.
>
>> You are sure that userspace is not working in the background,
>> triggered by uevents, and comes into your way here?
>
> Note that krtek exists after the first command. But cannot be renamed
> further.

Yeah, I can confirm the problem here. I works fine with earlier
kernels and fails with the latest -next:

# uname -r
3.3.0-rc1-next-20120131+
# modprobe dummy
# ip link set dummy0 name foo0
# ip link set foo0 name bar0
RTNETLINK answers: No such file or directory

Kay
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