Re: [RFC PATCH net-next v2 0/5] netns: allow to identify peer netns

From: Nicolas Dichtel
Date: Wed Sep 24 2014 - 05:32:40 EST

Le 23/09/2014 21:26, Andy Lutomirski a Ãcrit :
On Tue, Sep 23, 2014 at 6:20 AM, Nicolas Dichtel
<nicolas.dichtel@xxxxxxxxx> wrote:
The goal of this serie is to be able to multicast netlink messages with an
attribute that identify a peer netns.
This is needed by the userland to interpret some informations contained in
netlink messages (like IFLA_LINK value, but also some other attributes in case
of x-netns netdevice (see also and

Ids are stored in the parent user namespace. These ids are valid only inside
this user namespace. The user can retrieve these ids via a new netlink messages,
but only if peer netns are in the same user namespace.

What about the parent / ancestors of the owning userns? Can processes
in those usernses see any form of netns id?
With this serie no. I'm not sure if ancestors really needs to be able to
get these ids. What is your opinion?
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