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Date: Tue, 27 Dec 2016 15:16:14 +0100
From: Daniel Borkmann <daniel@iogearbox.net>
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To: Herbert Xu <herbert@gondor.apana.org.au>,
        Andy Lutomirski <luto@amacapital.net>
CC: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Andy Lutomirski <luto@kernel.org>, Netdev <netdev@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
        "Jason A. Donenfeld" <Jason@zx2c4.com>,
        Hannes Frederic Sowa <hannes@stressinduktion.org>,
        Alexei Starovoitov <alexei.starovoitov@gmail.com>,
        Eric Dumazet <edumazet@google.com>, Eric Biggers <ebiggers3@gmail.com>,
        Tom Herbert <tom@herbertland.com>,
        "David S. Miller" <davem@davemloft.net>
Subject: Re: [RFC PATCH 4.10 1/6] crypto/sha256: Refactor the API so it can
 be used without shash
References: <cover.1482545792.git.luto@kernel.org> <942b91f25a63b22ec4946378a1fffe78d655cf18.1482545792.git.luto@kernel.org> <CAKv+Gu-UCqwchgbhg8VN4s=Yxk=PkjXG46NZo=8P4wAQtJ2TXw@mail.gmail.com> <CALCETrVbT_1=cdU1+a-+KbhoFqeT3XvbHjY0s_U7C5JVgiPx_Q@mail.gmail.com> <20161226075757.GA8916@gondor.apana.org.au> <CAKv+Gu-NMNCEs61f4k7JSf9iSJ1A_Gy1r=kZRGqtbDsEDz7--Q@mail.gmail.com> <CALCETrXFTQ2AXgbQzPnRcDRHK81=FS1R0zqfoTqGjUsqZy2PvQ@mail.gmail.com> <20161227095853.GA10588@gondor.apana.org.au>
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On 12/27/2016 10:58 AM, Herbert Xu wrote:
> On Mon, Dec 26, 2016 at 10:08:48AM -0800, Andy Lutomirski wrote:
>>
>> According to Daniel, the networking folks want to let embedded systems
>> include BPF without requiring the crypto core.
>
> Last I checked the IPv4 stack depended on the crypto API so this
> sounds bogus.

I think there's a bit of a mixup here with what I said. To clarify,
requirement back then from tracing folks was that bpf engine and
therefore bpf syscall can be build w/o networking enabled for small
devices, so dependencies preferably need to be kept on a absolute
minimum, same counts for either making it suddenly a depend on
CRYPTO or a select CRYPTO for just those few lines that can be
pulled in from lib/ code instead.