netdev - Re: [PATCH bpf-next v5 00/12] Extend SOCKMAP to store listening sockets

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Message-ID: <87blqpcao0.fsf@cloudflare.com>
Date:   Mon, 27 Jan 2020 14:05:03 +0100
From:   Jakub Sitnicki <jakub@...udflare.com>
To:     bpf@...r.kernel.org, Daniel Borkmann <daniel@...earbox.net>
Cc:     netdev@...r.kernel.org, kernel-team@...udflare.com
Subject: Re: [PATCH bpf-next v5 00/12] Extend SOCKMAP to store listening sockets

On Mon, Jan 27, 2020 at 01:55 PM CET, Jakub Sitnicki wrote:
> Make SOCKMAP a generic collection for listening as well as established
> sockets. This lets us use SOCKMAP BPF maps with reuseport BPF programs.
>
> The biggest advantage of SOCKMAP over REUSEPORT_SOCKARRAY is that the
> former allows the socket can be in more than one map at the same time.
> However, until SOCKMAP gets extended to work with UDP, it is not a drop in
> replacement for REUSEPORT_SOCKARRAY.
>
> Having a BPF map type that can hold listening sockets, and can gracefully
> co-exist with reuseport BPF is important if, in the future, we want to have
> BPF programs that run at socket lookup time [0]. Cover letter for v1 of
> this series tells the full background story of how we got here [1].
>
> v5 is a rebase onto recent bpf-next. Patches 1 & 2 has conflicts. I carried
> over the Acks.

Well, this is embarassing.

Please don't apply. I have some uncomitted local changes. Will roll v6.