netdev - Re: [PATCH bpf-next] libbpf: fix BTF-defined map's _

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Message-ID: <CAADnVQJ-GhhZskSjWq-rfNCZfUoNn4vMxwPHoGSRng3A5aaBsw@mail.gmail.com>
Date:   Sat, 5 Oct 2019 18:05:01 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Andrii Nakryiko <andriin@...com>
Cc:     bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Kernel Team <kernel-team@...com>
Subject: Re: [PATCH bpf-next] libbpf: fix BTF-defined map's __type macro
 handling of arrays

On Fri, Oct 4, 2019 at 1:10 AM Andrii Nakryiko <andriin@...com> wrote:
>
> Due to a quirky C syntax of declaring pointers to array or function
> prototype, existing __type() macro doesn't work with map key/value types
> that are array or function prototype. One has to create a typedef first
> and use it to specify key/value type for a BPF map.  By using typeof(),
> pointer to type is now handled uniformly for all kinds of types. Convert
> one of self-tests as a demonstration.
>
> Signed-off-by: Andrii Nakryiko <andriin@...com>

Applied. Thanks