linux-kernel - Re: [PATCH v2] crypto/ahash: Require export/import in ahash

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Date:   Thu, 18 Jan 2018 11:51:29 +0100
From:   Kamil Konieczny <k.konieczny@...tner.samsung.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        linux-crypto@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] crypto/ahash: Require export/import in ahash

On 16.01.2018 19:38, Kamil Konieczny wrote:
> Export and import were optional in async hash. As most drivers were
> rewritten, they become mandatory now, so correct init of ahash
> transformation.
> 
> Signed-off-by: Kamil Konieczny <k.konieczny@...tner.samsung.com>

Please drop this patch, as there is one more driver needed for convert,
namely bfin_crc.c

I will also prepare this as patch series, to be sure that this patch is last

> ---
> This is resend of previous patch. As Bartlomiej Zolnierkiewicz pointed out,
> there are still three crypto drivers that didn't have export/import implemented:
> 
> drivers/crypto/mxs-dcp.c
> drivers/crypto/n2_core.c
> drivers/crypto/ux500/hash/hash_core.c
> 
> I have no documentation for them, so I sended patches with the behaviour taken
> from crypto framework, but maybe that hardware is capable of import/export,
> so proper implementation is possible. Unfortunatly, there is no maintainer
> for any of these files.
> 
> Please take this patch after these remainig drivers will be patched.
> 
>  crypto/ahash.c | 18 ++----------------
>  1 file changed, 2 insertions(+), 16 deletions(-)
> 
> diff --git a/crypto/ahash.c b/crypto/ahash.c
> index 3a35d67de7d9..7a8906d5af53 100644
> --- a/crypto/ahash.c
> +++ b/crypto/ahash.c
> @@ -434,16 +434,6 @@ static int ahash_def_finup(struct ahash_request *req)
>  	return ahash_def_finup_finish1(req, err);
>  }
>  
> -static int ahash_no_export(struct ahash_request *req, void *out)
> -{
> -	return -ENOSYS;
> -}
> -
> -static int ahash_no_import(struct ahash_request *req, const void *in)
> -{
> -	return -ENOSYS;
> -}
> -
>  static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
>  {
>  	struct crypto_ahash *hash = __crypto_ahash_cast(tfm);
> @@ -451,8 +441,8 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
>  
>  	hash->setkey = ahash_nosetkey;
>  	hash->has_setkey = false;
> -	hash->export = ahash_no_export;
> -	hash->import = ahash_no_import;
> +	hash->export = alg->export;
> +	hash->import = alg->import;
>  
>  	if (tfm->__crt_alg->cra_type != &crypto_ahash_type)
>  		return crypto_init_shash_ops_async(tfm);
> @@ -467,10 +457,6 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
>  		hash->setkey = alg->setkey;
>  		hash->has_setkey = true;
>  	}
> -	if (alg->export)
> -		hash->export = alg->export;
> -	if (alg->import)
> -		hash->import = alg->import;
>  
>  	return 0;
>  }
> 

-- 
Best regards,
Kamil Konieczny
Samsung R&D Institute Poland