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

From	Herbert Xu <herbert@gondor.apana.org.au>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework
Date	2016-04-18 10:40 +0200
Message-ID	<rpcSS-2jV-19@gated-at.bofh.it> (permalink)
References	(5 earlier) <rpcga-1JC-15@gated-at.bofh.it> <rpcpQ-26F-19@gated-at.bofh.it> <rpczw-2aB-13@gated-at.bofh.it> <rpcJb-2fT-1@gated-at.bofh.it> <rpcJc-2fT-23@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Mon, Apr 18, 2016 at 04:28:46PM +0800, Baolin Wang wrote:
> 
> What I meaning is if the xts engine can support bulk block, then the
> engine driver can select bulk mode to do encryption, but if their xts
> engine can not support bulk mode, which depends on hardware design,
> the engine driver can not select bulk mode. So the dm-crypt can not
> know what will be selected by the engine driver, it can not send one
> bulk block each time.

Why can't the xts code just break it up if it can't handle it?

You want to postpone splitting as much as possible.  Even if the
underlying xts code couldn't handle it, it would still make sense
for the crypto API to see the request in one piece.

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

Thread

Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Baolin Wang <baolin.wang@linaro.org> - 2016-04-18 07:40 +0200
  Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Herbert Xu <herbert@gondor.apana.org.au> - 2016-04-18 07:50 +0200
    Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Baolin Wang <baolin.wang@linaro.org> - 2016-04-18 08:10 +0200
      Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Herbert Xu <herbert@gondor.apana.org.au> - 2016-04-18 09:10 +0200
        Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Herbert Xu <herbert@gondor.apana.org.au> - 2016-04-18 09:30 +0200
          Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Baolin Wang <baolin.wang@linaro.org> - 2016-04-18 10:00 +0200
            Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Herbert Xu <herbert@gondor.apana.org.au> - 2016-04-18 10:10 +0200
              Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Baolin Wang <baolin.wang@linaro.org> - 2016-04-18 10:20 +0200
                Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Herbert Xu <herbert@gondor.apana.org.au> - 2016-04-18 10:30 +0200
                Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Baolin Wang <baolin.wang@linaro.org> - 2016-04-18 10:30 +0200
                Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Herbert Xu <herbert@gondor.apana.org.au> - 2016-04-18 10:40 +0200
                Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Baolin Wang <baolin.wang@linaro.org> - 2016-04-18 10:50 +0200
                Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Herbert Xu <herbert@gondor.apana.org.au> - 2016-04-18 10:50 +0200
                Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Baolin Wang <baolin.wang@linaro.org> - 2016-04-18 11:00 +0200
        Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Baolin Wang <baolin.wang@linaro.org> - 2016-04-18 09:30 +0200
  Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Mike Snitzer <snitzer@redhat.com> - 2016-04-18 15:40 +0200
    Re: [PATCH v2 0/4] Introduce bulk mode for crypto engine framework Milan Broz <mbroz@redhat.com> - 2016-04-18 23:30 +0200

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