netdev - Re: [PATCH net-next] net: add an ioctl to get a socket network namespace

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Message-Id: <20161031.105808.1717498783593722519.davem@davemloft.net>
Date:   Mon, 31 Oct 2016 10:58:08 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     avagin@...nvz.org
Cc:     ebiederm@...ssion.com, containers@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-api@...r.kernel.org
Subject: Re: [PATCH net-next] net: add an ioctl to get a socket network
 namespace

From: Andrei Vagin <avagin@...nvz.org>
Date: Mon, 24 Oct 2016 18:29:13 -0700

> From: Andrey Vagin <avagin@...nvz.org>
> 
> Each socket operates in a network namespace where it has been created,
> so if we want to dump and restore a socket, we have to know its network
> namespace.
> 
> We have a socket_diag to get information about sockets, it doesn't
> report sockets which are not bound or connected.
> 
> This patch introduces a new socket ioctl, which is called SIOCGSKNS
> and used to get a file descriptor for a socket network namespace.
> 
> A task must have CAP_NET_ADMIN in a target network namespace to
> use this ioctl.
> 
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Eric W. Biederman <ebiederm@...ssion.com>
> Signed-off-by: Andrei Vagin <avagin@...nvz.org>

Applied.