linux-kernel - Re: [PATCH 5/5] crypto: ahash.c: Require export/import in ahash

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Date:   Fri, 19 Jan 2018 10:53:51 +0100
From:   Kamil Konieczny <k.konieczny@...tner.samsung.com>
To:     Marek Vasut <marex@...x.de>, linux-crypto@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Sonic Zhang <sonic.zhang@...log.com>,
        Fabio Estevam <fabio.estevam@...escale.com>,
        Shawn Guo <shawn.guo@...aro.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Jan Engelhardt <jengelh@...i.de>,
        Arvind Yadav <arvind.yadav.cs@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Joakim Bech <joakim.bech@...aro.org>,
        linux-kernel@...r.kernel.org,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: Re: [PATCH 5/5] crypto: ahash.c: Require export/import in ahash

On 18.01.2018 22:31, Marek Vasut wrote:
> On 01/18/2018 07:34 PM, Kamil Konieczny wrote:
>> Export and import are mandatory in async hash. As drivers were
>> rewritten, drop empty wrappers and correct init of ahash transformation.
> 
> Are you moving checks from the core subsystem to drivers ? This looks
> really nonsensical and the commit message doesn't explain the rationale
> for that at all.

I am removing checks from core. Export and import were optional in beginnig
of crypto framework, but as time goes on they become mandatory.

> 
>> Signed-off-by: Kamil Konieczny <k.konieczny@...tner.samsung.com>
>> ---
>>  crypto/ahash.c | 18 ++----------------
>>  1 file changed, 2 insertions(+), 16 deletions(-)
>>
>> diff --git a/crypto/ahash.c b/crypto/ahash.c
>> index 3a35d67de7d9..c3cce508c1d4 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 +441,6 @@ 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;
>>  
>>  	if (tfm->__crt_alg->cra_type != &crypto_ahash_type)
>>  		return crypto_init_shash_ops_async(tfm);
>> @@ -462,15 +450,13 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
>>  	hash->final = alg->final;
>>  	hash->finup = alg->finup ?: ahash_def_finup;
>>  	hash->digest = alg->digest;
>> +	hash->export = alg->export;
>> +	hash->import = alg->import;
>>  
>>  	if (alg->setkey) {
>>  		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