Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework

[Baolin Wang]

On 18 April 2016 at 13:45, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote:
> On Mon, Apr 18, 2016 at 01:31:09PM +0800, Baolin Wang wrote:
>>
>> We've tried to do this in dm-crypt, but it failed.
>> The dm-crypt maintainer explained to me that I should optimize the
>> driver, not add strange hw-dependent crypto modes to dm-crypt, this is
>> not the first crypto accelerator that is just not suited for this kind
>> of use.
>> He thought if it can process batch of chunks of data each with own IV,
>> then it can work with dm-crypt, but he thought such optimized code
>> should be inside crypto API, not in dmcrypt.
>
> That's a completely bogus argument.  The user always has more
> information available than the underlying API.  So it is totally
> stupid to have the API try to extract information that the user
> could have provided in the first place.

If the crypto hardware engine can support bulk data
encryption/decryption, so the engine driver can select bulk mode to
handle the requests. I think it is a totally driver things, not in
dmcrypt. The dmcrypt can not get the hardware engine's attributes.

>
> I'm not taking this patch-set.
>
> Cheers,
> --
> Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt



-- 
Baolin.wang
Best Regards