From mboxrd@z Thu Jan  1 00:00:00 1970
From: Benjamin Thery <benjamin.thery-6ktuUTfB/bM@public.gmane.org>
Subject: Re: [PATCH 06/11] sysfs: Implement sysfs tagged directory support.
Date: Thu, 03 Jul 2008 14:37:49 +0200
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To: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
Cc: Tejun Heo <htejun-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Greg Kroah-Hartman <gregkh-l3A5Bk7waGM@public.gmane.org>, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Al Viro <viro-rfM+Q5joDG/XmaaqVzeoHQ@public.gmane.org>, Linux Containers <containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org>, Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>, Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
List-Id: containers.vger.kernel.org

Eric W. Biederman wrote:
> Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org> writes:
> 
>> The kobject events are sent through a netlink message which is not currently per
>> network namespace. Shouldn't be useful to have a way to retrieve from the
>> kobject the network namespace or the uevent socket associated with it ? IMHO
>> having idr in the kobject + netns pointer associated may help to handle the
>> sysfs isolation and makes the uevent per namespace trivial, no ?
> 
> Grumble.  I have been conveniently been forgetting about that socket.
> Similarly we have the user mode helpers to deal with.
> 
> For this conversation there is a simple answer.  All of that is in the
> kobject layer, and works even when you compile sysfs out of your kernel.
> Therefore it is a separate problem.  And sysfs idr tags have nothing
> to do with it.

> It is most definitely something we need to come back to.  I bet there
> are some interesting interactions when you have multiple network devices
> with the same name generating events.

Indeed, we observed some fun things with one distro (which defines some
particular udev rules) when a device called eth0 in a namespace comes 
back to init net :)

Benjamin

> 
> Eric
> 
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