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Date:   Wed, 27 May 2020 08:27:36 -0600
From:   David Ahern <>
To:     Jesper Dangaard Brouer <>,
        David Ahern <>
Subject: Re: [PATCH bpf-next 1/5] bpf: Handle 8-byte values in DEVMAP and

On 5/27/20 4:26 AM, Jesper Dangaard Brouer wrote:
> IMHO we really need to leverage BTF here, as I'm sure we need to do more
> extensions, and this size matching will get more and more unmaintainable.
> With BTF in place, dumping the map via bpftool, will also make the
> fields "self-documenting".

furthermore, the kernel is changing the value - an fd is passed in and
an id is returned. I do not see how any of this fits into BTF.

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