netdev - Re: [PATCH bpf-next v5 0/8] bpf: getsockopt and setsockopt hooks

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Message-ID: <20190610213853.vx4dtpspzgvsspez@kafai-mbp.dhcp.thefacebook.com>
Date:   Mon, 10 Jun 2019 21:38:55 +0000
From:   Martin Lau <kafai@...com>
To:     Stanislav Fomichev <sdf@...gle.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "ast@...nel.org" <ast@...nel.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>
Subject: Re: [PATCH bpf-next v5 0/8] bpf: getsockopt and setsockopt hooks

On Mon, Jun 10, 2019 at 02:08:22PM -0700, Stanislav Fomichev wrote:
> This series implements two new per-cgroup hooks: getsockopt and
> setsockopt along with a new sockopt program type. The idea is pretty
> similar to recently introduced cgroup sysctl hooks, but
> implementation is simpler (no need to convert to/from strings).
> 
> What this can be applied to:
> * move business logic of what tos/priority/etc can be set by
>   containers (either pass or reject)
> * handle existing options (or introduce new ones) differently by
>   propagating some information in cgroup/socket local storage
> 
> Compared to a simple syscall/{g,s}etsockopt tracepoint, those
> hooks are context aware. Meaning, they can access underlying socket
> and use cgroup and socket local storage.
Acked-by: Martin KaFai Lau <kafai@...com>