netdev - Re: sysfs class/net/ problem

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Date:	Wed, 02 Jun 2010 21:25:32 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Greg KH <greg@...ah.com>, netdev <netdev@...r.kernel.org>
Subject: Re: sysfs class/net/ problem

On Wed, 2010-06-02 at 11:05 -0700, Eric W. Biederman wrote:

> My current hypothesis is something is causing us to try and delete
> the symlink from the wrong namespace, so we just skip that part of it.

Hmm... ok:

[   70.338274] create link wlan2 ns=(null)
...
[   71.881775] delete link wlan2 ns=(null)
[   71.881777] hash_and_remove ffff88001f9563c0, (null), wlan2
[   71.881782] sd=ffff88001ce2d9c0, sdns=ffffffff8271c260

and thus we skip sysfs_remove_one() in sysfs_hash_and_remove() because
sysfs_find_dirent() return an sd with a different ns than we passed in.
Why is the ns we pass in NULL, shouldn't it be init_ns?

johannes

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