netdev - Re: [bpf PATCH v2 3/8] bpf: sockmap/tls, push write

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Date:   Sat, 11 Jan 2020 17:00:52 -0800
From:   "Jonathan Lemon" <jonathan.lemon@...il.com>
To:     "John Fastabend" <john.fastabend@...il.com>
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org, daniel@...earbox.net,
        ast@...nel.org, song@...nel.org
Subject: Re: [bpf PATCH v2 3/8] bpf: sockmap/tls, push write_space updates
 through ulp updates



On 10 Jan 2020, at 22:12, John Fastabend wrote:

> When sockmap sock with TLS enabled is removed we cleanup bpf/psock state
> and call tcp_update_ulp() to push updates to TLS ULP on top. However, we
> don't push the write_space callback up and instead simply overwrite the
> op with the psock stored previous op. This may or may not be correct so
> to ensure we don't overwrite the TLS write space hook pass this field to
> the ULP and have it fixup the ctx.
>
> This completes a previous fix that pushed the ops through to the ULP
> but at the time missed doing this for write_space, presumably because
> write_space TLS hook was added around the same time.
>
> Cc: stable@...r.kernel.org
> Fixes: 95fa145479fbc ("bpf: sockmap/tls, close can race with map free")
> Signed-off-by: John Fastabend <john.fastabend@...il.com>

Acked-by: Jonathan Lemon <jonathan.lemon@...il.com>