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Date:   Sat, 4 Feb 2017 19:25:49 -0800
From:   Alexei Starovoitov <>
To:     Andy Lutomirski <>
Cc:     Alexei Starovoitov <>,
        "David S . Miller" <>,
        Daniel Borkmann <>,
        David Ahern <>,
        Tejun Heo <>,
        "Eric W . Biederman" <>,
        Network Development <>
Subject: Re: [PATCH v2 net] bpf: add bpf_sk_netns_id() helper

On Sat, Feb 04, 2017 at 09:15:10AM -0800, Andy Lutomirski wrote:
> On Fri, Feb 3, 2017 at 5:22 PM, Alexei Starovoitov <> wrote:
> > Note that all bpf programs types are global.
> I don't think this has a clear enough meaning to work with.  In

Please clarify what you mean. The quoted part says
"bpf programs are global". What is not "clear enough" there?

> I think that this patch plus a minor change to prevent installing
> cgroup+bpf programs if the installer isn't in the init netns + fs ns
> would work because it would allow new, migratable semantics to be
> added down the road to relax the restriction.

Forcing installer to be in init netns is not acceptable to David
who added cgroup_sock in the first place. I'm not sure why
we have to discuss that bit in circles.

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