netdev - RE: [PATCH bpf-next v2 01/11] bpf, sk_msg: Don't reset saved sock proto on restore

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Date:   Sat, 11 Jan 2020 14:50:32 -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 01/11] bpf, sk_msg: Don't reset saved sock
 proto on restore

Jakub Sitnicki wrote:
> There is no need to reset psock->sk_proto when restoring socket protocol
> callbacks (sk->sk_prot). The psock is about to get detached from the sock
> and eventually destroyed.
> 
> No harm done if we restore the protocol callbacks twice, while it makes
> reasoning about psock state easier, that is once psock was initialized, we
> can assume psock->sk_proto is set.
> 
> Also, we don't need a fallback for when socket is not using ULP.
> tcp_update_ulp already does this for us.
> 
> Signed-off-by: Jakub Sitnicki <jakub@...udflare.com>
> ---

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