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Wed, 21 Oct 2020 04:44:25 +0000 (UTC) Date: Tue, 20 Oct 2020 21:44:23 -0700 From: Eric Biggers To: Christoph Hellwig Message-ID: <20201021044423.GB3939@sol.localdomain> References: <20201015214632.41951-1-satyat@google.com> <20201015214632.41951-2-satyat@google.com> <20201016072044.GB14885@infradead.org> MIME-Version: 1.0 In-Reply-To: <20201016072044.GB14885@infradead.org> X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-loop: dm-devel@redhat.com Cc: Jens Axboe , Mike Snitzer , linux-kernel@vger.kernel.org, Satya Tangirala , linux-block@vger.kernel.org, dm-devel@redhat.com, Alasdair Kergon Subject: Re: [dm-devel] [PATCH v2 1/4] block: keyslot-manager: Introduce passthrough keyslot manager X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Fri, Oct 16, 2020 at 08:20:44AM +0100, Christoph Hellwig wrote: > And this just validates my argument that calling the inline crypto work > directly from the block layer instead of just down below in blk-mq was > wrong. We should not require any support from stacking drivers at the > keyslot manager level. I'm not sure what you're referring to here; could you clarify? It's true that device-mapper devices don't need the actual keyslot management. But they do need the ability to expose crypto capabilities as well as a key eviction function. And those are currently handled by "struct blk_keyslot_manager". Hence the need for a "passthrough keyslot manager" that does those other things but not the actual keyslot management. FWIW, I suggested splitting these up, but you disagreed and said you wanted the crypto capabilities to remain part of the blk_keyslot_manager (https://lkml.kernel.org/linux-block/20200327170047.GA24682@infradead.org/). If you've now changed your mind, please be clear about it. - Eric -- dm-devel mailing list dm-devel@redhat.com https://www.redhat.com/mailman/listinfo/dm-devel