linux-kernel - Re: [PATCH net-next 1/1] rtnetlink: request RTM

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Message-ID: <20180122220046.7b65a98a@redhat.com>
Date:   Mon, 22 Jan 2018 22:00:46 +0100
From:   Jiri Benc <jbenc@...hat.com>
To:     Christian Brauner <christian.brauner@...onical.com>
Cc:     Christian Brauner <christian.brauner@...ntu.com>,
        davem@...emloft.net, dsahern@...il.com, fw@...len.de,
        daniel@...earbox.net, lucien.xin@...il.com,
        mschiffer@...verse-factory.net, jakub.kicinski@...ronome.com,
        vyasevich@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, stephen@...workplumber.org
Subject: Re: [PATCH net-next 1/1] rtnetlink: request RTM_GETLINK by pid or
 fd

On Thu, 18 Jan 2018 21:55:53 +0100, Christian Brauner wrote:
> A more concrete scenario is creating a network namespace, moving a
> device into it via RTM_SETLINK which also supports IFLA_NET_NS_{FD,PID}
> and then wanting to query the device. This would be very easy to do if
> one could reuse the IFLA_NET_NS_{FD,PID} without having to set a
> netnsid.

Wouldn't be a better solution to have a way to request the netnsid
allocation (and return it) right away when creating the name space,
then?

 Jiri