netdev - Re: [PATCH v2 bpf-next 03/14] bpf: Support bpf program calling kernel function

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Message-ID: <87wntudh8w.fsf@toke.dk>
Date:   Thu, 25 Mar 2021 23:02:23 +0100
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Martin KaFai Lau <kafai@...com>, bpf@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>, kernel-team@...com,
        netdev@...r.kernel.org
Subject: Re: [PATCH v2 bpf-next 03/14] bpf: Support bpf program calling
 kernel function

Martin KaFai Lau <kafai@...com> writes:

> This patch adds support to BPF verifier to allow bpf program calling
> kernel function directly.

Hi Martin

This is exciting stuff! :)

Just one quick question about this:

> [ For the future calling function-in-kernel-module support, an array
>   of module btf_fds can be passed at the load time and insn->off
>   can be used to index into this array. ]

Is adding the support for extending this to modules also on your radar,
or is this more of an "in case someone needs it" comment? :)

-Toke