From: David Miller <davem@davemloft.net>
To: xemul@openvz.org
Cc: netdev@vger.kernel.org, devel@openvz.org, ebiederm@xmission.com
Subject: Re: [PATCH][NETNS] Make ifindex generation per-namespace
Date: Tue, 09 Oct 2007 13:12:32 -0700 (PDT) [thread overview]
Message-ID: <20071009.131232.39157518.davem@davemloft.net> (raw)
In-Reply-To: <470B71CD.3000706@openvz.org>
From: Pavel Emelyanov <xemul@openvz.org>
Date: Tue, 09 Oct 2007 16:19:25 +0400
> Currently indexes for netdevices come sequentially one by
> one, and the same stays true even for devices that are
> created for namespaces.
>
> Side effects of this are:
> * lo device has not 1 index in a namespace. This may break
> some userspace that relies on it (and AFAIR something
> really broke in OpenVZ VEs without this);
> * after some time namespaces will have devices with indexes
> like 1000000 os similar. This might be confusing for a
> human (tools will not mind).
>
> So move the (currently "global" and static) ifindex variable
> on the struct net, making the indexes allocation look more
> like on a standalone machine.
>
> Moreover - when we have indexes intersect between namespaces,
> we may catch more BUGs in the future related to "wrong device
> was found for a given index".
>
> Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Based upon Eric's and other's comments, I'm holding off on
this for now.
prev parent reply other threads:[~2007-10-09 20:12 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-09 12:19 [PATCH][NETNS] Make ifindex generation per-namespace Pavel Emelyanov
2007-10-09 14:48 ` Daniel Lezcano
2007-10-09 16:18 ` David Stevens
2007-10-09 17:43 ` Eric W. Biederman
2007-10-09 20:11 ` David Miller
2007-10-09 21:00 ` Eric W. Biederman
2007-10-09 21:17 ` David Miller
2007-10-09 20:12 ` David Miller
2007-10-09 17:41 ` Eric W. Biederman
2007-10-10 8:55 ` Pavel Emelyanov
2007-10-10 18:15 ` Eric W. Biederman
2007-10-10 18:34 ` Johannes Berg
2007-10-10 19:51 ` Eric W. Biederman
2007-10-11 9:32 ` Johannes Berg
2007-10-11 17:22 ` Eric W. Biederman
2007-10-09 20:12 ` David Miller [this message]
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