linux-kernel - Re: [PATCH v2 2/2] crypto: engine - Permit to enqueue skcipher request

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Message-ID: <20170623064837.GA29139@gondor.apana.org.au>
Date:   Fri, 23 Jun 2017 14:48:37 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     davem@...emloft.net, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] crypto: engine - Permit to enqueue skcipher
 request

On Mon, Jun 19, 2017 at 09:55:24AM +0200, Corentin Labbe wrote:
>
> Since there are two different user of "crypto engine + ablkcipher", it will be not easy to convert them in one serie. (I could do it, but I simply could not test it for OMAP (lack of hw))
> And any new user which want to use crypto engine+skcipher (like me with the sun8i-ce driver) are simply stuck.

You're right.  We'll need to do this in a backwards-compatible way.  In fact
we already do something similar in skcipher.c itself.  Simply look at the
cra_type field and if it matches blkcipher/ablkcipher/givcipher then it's
legacy ablkcipher, otherwise it's skcipher.

Also the way crypto_engine looks at the request type in the data-path is
suboptimal.  This should really be built into the cra_type object.  For
example, we can have cra_type->engine->prepare_request which would just
do the right thing.

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt