From: Herbert Xu <herbert@gondor.apana.org.au>
To: Baolin Wang <baolin.wang@linaro.org>
Cc: Jens Axboe <axboe@kernel.dk>, Alasdair G Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@redhat.com>,
"open list:DEVICE-MAPPER (LVM)" <dm-devel@redhat.com>,
David Miller <davem@davemloft.net>,
Eric Biggers <ebiggers3@gmail.com>,
Joonsoo Kim <js1304@gmail.com>,
tadeusz.struk@intel.com, smueller@chronox.de,
Masanari Iida <standby24x7@gmail.com>,
Shaohua Li <shli@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Sagi Grimberg <sagig@mellanox.com>,
Kent Overstreet <kent.overstreet@gmail.com>,
Keith Busch <keith.busch@intel.com>, Tejun Heo <tj@kernel.org>,
Ming Lei <ming.lei@canonical.com>,
Mark Brown <broonie@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
linux-crypto@vger.kernel.org, linux-block@vger.kernel.org,
"open list:SOFTWARE RAID (Multiple Disks) SUPPORT"
<linux-raid@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RFC v2 2/3] crypto: Introduce CRYPTO_ALG_BULK flag
Date: Fri, 3 Jun 2016 18:09:51 +0800 [thread overview]
Message-ID: <20160603100951.GA31382@gondor.apana.org.au> (raw)
In-Reply-To: <CAMz4kuL4zAg8dRRM7Lv4tp-c_GHq=0mYzvb88gDEd5YSOtvpRA@mail.gmail.com>
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.
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
next prev parent reply other threads:[~2016-06-03 10:10 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-27 11:11 [RFC v2 0/3] Introduce the bulk mode method when sending request to crypto layer Baolin Wang
2016-05-27 11:11 ` [RFC v2 1/3] block: Introduce blk_bio_map_sg() to map one bio Baolin Wang
2016-06-03 14:35 ` Jens Axboe
2016-06-06 5:03 ` Baolin Wang
2016-06-03 14:38 ` Jens Axboe
2016-06-06 5:04 ` Baolin Wang
2016-05-27 11:11 ` [RFC v2 2/3] crypto: Introduce CRYPTO_ALG_BULK flag Baolin Wang
2016-06-02 8:26 ` Herbert Xu
2016-06-03 6:48 ` Baolin Wang
2016-06-03 6:51 ` Herbert Xu
2016-06-03 7:10 ` Baolin Wang
2016-06-03 7:54 ` Herbert Xu
2016-06-03 8:15 ` Baolin Wang
2016-06-03 8:21 ` Herbert Xu
2016-06-03 9:23 ` Baolin Wang
2016-06-03 10:09 ` Herbert Xu [this message]
2016-06-03 10:47 ` Baolin Wang
2016-05-27 11:11 ` [RFC v2 3/3] md: dm-crypt: Introduce the bulk mode method when sending request Baolin Wang
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