linux-kernel - Re: [PATCH net-next 1/1] rtnetlink: enable IFLA_IF_NETNSID for RTM

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Date:   Wed, 31 Jan 2018 17:20:49 +0100
From:   Christian Brauner <christian.brauner@...onical.com>
To:     David Miller <davem@...emloft.net>
Cc:     christian.brauner@...ntu.com, netdev@...r.kernel.org,
        ebiederm@...ssion.com, dsahern@...il.com, fw@...len.de,
        daniel@...earbox.net, lucien.xin@...il.com,
        mschiffer@...verse-factory.net, jakub.kicinski@...ronome.com,
        vyasevich@...il.com, linux-kernel@...r.kernel.org,
        jbenc@...hat.com, w.bumiller@...xmox.com, nicolas.dichtel@...nd.com
Subject: Re: [PATCH net-next 1/1] rtnetlink: enable IFLA_IF_NETNSID for
 RTM_NEWLINK

On Wed, Jan 31, 2018 at 10:30:44AM -0500, David Miller wrote:
> From: Christian Brauner <christian.brauner@...ntu.com>
> Date: Mon, 29 Jan 2018 18:07:20 +0100
> 
> > - Backwards Compatibility:
> >   If userspace wants to determine whether RTM_NEWLINK supports the
> >   IFLA_IF_NETNSID property they should first send an RTM_GETLINK request
> >   with IFLA_IF_NETNSID on lo. If either EACCESS is returned or the reply
> >   does not include IFLA_IF_NETNSID userspace should assume that
> >   IFLA_IF_NETNSID is not supported on this kernel.
> >   If the reply does contain an IFLA_IF_NETNSID property userspace
> >   can send an RTM_NEWLINK with a IFLA_IF_NETNSID property. If they receive
> >   EOPNOTSUPP then the kernel does not support the IFLA_IF_NETNSID property
> >   with RTM_NEWLINK. Userpace should then fallback to other means.
> > 
> > - Security:
> >   Callers must have CAP_NET_ADMIN in the owning user namespace of the
> >   target network namespace.
> > 
> > Signed-off-by: Christian Brauner <christian.brauner@...ntu.com>
> 
> Applied.

Thanks!