netdev - Re: [PATCH bpf v3 1/2] bpf: enforce that struct

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Date:   Fri, 26 Mar 2021 17:00:09 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Toke Høiland-Jørgensen <toke@...hat.com>@ci.codeaurora.org
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
        davem@...emloft.net, brouer@...hat.com, aarcange@...hat.com,
        williams@...hat.com, bpf@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH bpf v3 1/2] bpf: enforce that struct_ops programs be GPL-only

Hello:

This series was applied to bpf/bpf.git (refs/heads/master):

On Fri, 26 Mar 2021 11:03:13 +0100 you wrote:
> With the introduction of the struct_ops program type, it became possible to
> implement kernel functionality in BPF, making it viable to use BPF in place
> of a regular kernel module for these particular operations.
> 
> Thus far, the only user of this mechanism is for implementing TCP
> congestion control algorithms. These are clearly marked as GPL-only when
> implemented as modules (as seen by the use of EXPORT_SYMBOL_GPL for
> tcp_register_congestion_control()), so it seems like an oversight that this
> was not carried over to BPF implementations. Since this is the only user
> of the struct_ops mechanism, just enforcing GPL-only for the struct_ops
> program type seems like the simplest way to fix this.
> 
> [...]

Here is the summary with links:
  - [bpf,v3,1/2] bpf: enforce that struct_ops programs be GPL-only
    https://git.kernel.org/bpf/bpf/c/12aa8a9467b3
  - [bpf,v3,2/2] bpf/selftests: test that kernel rejects a TCP CC with an invalid license
    https://git.kernel.org/bpf/bpf/c/d8e8052e42d0

You are awesome, thank you!
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