netdev - Re: [PATCH 0/5] Networking cgroup controller

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Date:   Wed, 24 Aug 2016 17:28:48 -0700
From:   Mahesh Bandewar (महेश बंडेवार) 
        <maheshb@...gle.com>
To:     Parav Pandit <pandit.parav@...il.com>
Cc:     Anoop Naravaram <anaravaram@...gle.com>,
        Jonathan Corbet <corbet@....net>, Tejun Heo <tj@...nel.org>,
        lizefan@...wei.com, Johannes Weiner <hannes@...xchg.org>,
        David Miller <davem@...emloft.net>, kuznet@....inr.ac.ru,
        jmorris@...ei.org, yoshfuji@...ux-ipv6.org, kaber@...sh.net,
        linux-doc@...r.kernel.org, cgroups@...r.kernel.org,
        linux-netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Wei Wang <weiwan@...gle.com>, tom@...bertland.com
Subject: Re: [PATCH 0/5] Networking cgroup controller

On Tue, Aug 23, 2016 at 1:49 AM, Parav Pandit <pandit.parav@...il.com> wrote:
> Hi Anoop,
>
> Regardless of usecase, I think this functionality is best handled as
> LSM functionality instead of cgroup.
>
I'm not so sure about that. Cgroup APIs are useful and this is just an
extension to it.


> Tasks which are proposed in this patch are related to access control checks.
> LSM already has required hooks for socket operations such as bind(),
> listen() as few small examples.
>
> Refer to security_socket_listen() which invokes LSM specific hooks.
> This is invoked in source/net/socket.c as part of listen() system call.
> LSM hook callback can check whether a given a process can listen to
> requested UDP port or not.
>
This has administrative overhead that is not addressed. The underlying
cgroup infrastructure takes care of it in this (current)
implementation.

> Parav
>
>
[...]