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Date:   Wed, 17 Apr 2019 20:59:58 +0200
From:   Jiri Benc <>
To:     Richard Cochran <>
Cc:     Hangbin Liu <>,,
        David Miller <>,
        Miroslav Lichvar <>,
        Patrick McHardy <>,
Subject: Re: [PATCH net-next] macvlan: pass get_ts_info and SIOC[SG]HWTSTAMP
 ioctl to real device

On Wed, 17 Apr 2019 08:43:06 -0700, Richard Cochran wrote:
> If NET_ADMIN is enabled in the container, don't the host and container
> contend with each other for the physical interfaces anyhow?

Physical interfaces are not a problem, as each interface can be only in
a single net name space.

The problem here is this patch gives access to physical interface
settings through a virtual interface layered on top of it. Whenever
such thing is done, the virtual interface needs to provide a suitable
way of moderating access to the shared resources, so the individual
virtual interfaces do not affect each other. That's not what's being
done here.

I think this patch is wrong.


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