linux-kernel - Re: [PATCH bpf-next v4 2/4] bpf: Expose bpf_get_socket

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Message-ID: <CANA3-0d_VqjXUc0LBwc1f7Js9NfV_ZRp8e=tQ-q5-EWjRsqFYg@mail.gmail.com>
Date:   Wed, 9 Dec 2020 16:23:59 +0100
From:   KP Singh <kpsingh@...nel.org>
To:     Florent Revest <revest@...omium.org>
Cc:     bpf@...r.kernel.org, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, kpsingh@...omium.org,
        Martin KaFai Lau <kafai@...com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next v4 2/4] bpf: Expose bpf_get_socket_cookie to
 tracing programs

On Wed, Dec 9, 2020 at 2:29 PM Florent Revest <revest@...omium.org> wrote:
>
> This needs two new helpers, one that works in a sleepable context (using
> sock_gen_cookie which disables/enables preemption) and one that does not
> (for performance reasons). Both take a struct sock pointer and need to
> check it for NULLness.
>
> This helper could also be useful to other BPF program types such as LSM.
>
> Signed-off-by: Florent Revest <revest@...omium.org>

Acked-by: KP Singh <kpsingh@...nel.org>