Re: [RFC v2 2/3] crypto: Introduce CRYPTO_ALG_BULK flag

From: Herbert Xu
Date: Fri Jun 03 2016 - 06:10:46 EST

On Fri, Jun 03, 2016 at 05:23:59PM +0800, Baolin Wang wrote:
> Assuming one 64K size bio coming, we can map the whole bio with one sg
> table in crypt_convert_bulk_block() function. But if we send this bulk
> request to crypto layer, we should divide the bulk request into small
> requests, and each small request should be one sector size (512 bytes)
> with assuming the correct IV, but we need to allocate small requests
> memory for the division, which will not good for IO mapping, and how
> each small request connect to dm-crypt (how to notify the request is
> done?)?

Why won't it be good? The actual AES block size is 16 and yet we
have no trouble when you feed it a block of 512 bytes.

Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
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