netdev - Re: [PATCH v2] bpf: Restrict cgroup bpf hooks to the init netns

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Message-ID: <f494c25b-1ef0-1fe4-9ac5-05eafa903be0@cumulusnetworks.com>
Date:   Mon, 23 Jan 2017 21:10:34 -0700
From:   David Ahern <dsa@...ulusnetworks.com>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Andy Lutomirski <luto@...nel.org>,
        Network Development <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>
Subject: Re: [PATCH v2] bpf: Restrict cgroup bpf hooks to the init netns

On 1/23/17 7:39 PM, Andy Lutomirski wrote:
> I'm not sure I followed what you meant.  If I understood right (which
> is a big if) you're saying that ip vrf when run in a netns works
> correctly in that netns.  I agree, but I think that it would continue
> to work (even more reliably) if the hooks only executed in the netns
> in which they were created.  I think that would probably be a good
> improvement, and it could be done on top of my patch, but I'm not
> about to write that code for 4.10.

Sounds like an efficiency on the implementation that does not require limiting the code today to just init namespace.