netdev - Re: [PATCH v5 0/6] Add eBPF hooks for cgroups

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Message-ID: <20160914103038.GA910@salvia>
Date:   Wed, 14 Sep 2016 12:30:38 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Daniel Mack <daniel@...que.org>, htejun@...com,
        daniel@...earbox.net, ast@...com, davem@...emloft.net,
        kafai@...com, fw@...len.de, harald@...hat.com,
        netdev@...r.kernel.org, sargun@...gun.me, cgroups@...r.kernel.org
Subject: Re: [PATCH v5 0/6] Add eBPF hooks for cgroups

On Tue, Sep 13, 2016 at 09:42:19PM -0700, Alexei Starovoitov wrote:
[...]
> For us this cgroup+bpf is _not_ for filterting and _not_ for security.

If your goal is monitoring, then convert these hooks not to allow to
issue a verdict on the packet, so this becomes inoquous in the same
fashion as the tracing infrastructure.

[...]
> I'd really love to have an alternative to bpf for such tasks,
> but you seem to spend all the energy arguing against bpf whereas
> nft still has a lot to be desired.

Please Alexei, stop that FUD. Anyone that has spent just one day using
the bpf tooling and infrastructure knows you have problems to
resolve...