netdev - RE: [PATCH bpf-next v2 09/11] bpf: Allow selecting reuseport socket from a SOCKMAP

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Date:   Sat, 11 Jan 2020 17:00:16 -0800
From:   John Fastabend <john.fastabend@...il.com>
To:     Jakub Sitnicki <jakub@...udflare.com>, bpf@...r.kernel.org
Cc:     netdev@...r.kernel.org, kernel-team@...udflare.com,
        Eric Dumazet <edumazet@...gle.com>,
        John Fastabend <john.fastabend@...il.com>,
        Lorenz Bauer <lmb@...udflare.com>,
        Martin KaFai Lau <kafai@...com>
Subject: RE: [PATCH bpf-next v2 09/11] bpf: Allow selecting reuseport socket
 from a SOCKMAP

Jakub Sitnicki wrote:
> SOCKMAP now supports storing references to listening sockets. Nothing keeps
> us from using it as an array of sockets to select from in SK_REUSEPORT
> programs.
> 
> Whitelist the map type with the BPF helper for selecting socket.
> 
> The restriction that the socket has to be a member of a reuseport group
> still applies. Socket from a SOCKMAP that does not have sk_reuseport_cb set
> is not a valid target and we signal it with -EINVAL.
> 
> Signed-off-by: Jakub Sitnicki <jakub@...udflare.com>
> ---

Acked-by: John Fastabend <john.fastabend@...il.com>