netdev - Re: [PATCH rdma-next 00/13] Add RDMA inline crypto support

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Date:   Wed, 18 Jan 2023 07:14:30 +0000
From:   Chaitanya Kulkarni <chaitanyak@...dia.com>
To:     Eric Biggers <ebiggers@...nel.org>
CC:     Jason Gunthorpe <jgg@...dia.com>, Bryan Tan <bryantan@...are.com>,
        Christoph Hellwig <hch@....de>,
        Eric Dumazet <edumazet@...gle.com>,
        Israel Rukshin <israelr@...dia.com>,
        Jakub Kicinski <kuba@...nel.org>, Jens Axboe <axboe@...com>,
        Keith Busch <kbusch@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "linux-trace-kernel@...r.kernel.org" 
        <linux-trace-kernel@...r.kernel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Selvin Xavier <selvin.xavier@...adcom.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Vishnu Dasa <vdasa@...are.com>,
        Yishai Hadas <yishaih@...dia.com>,
        Leon Romanovsky <leon@...nel.org>
Subject: Re: [PATCH rdma-next 00/13] Add RDMA inline crypto support

Eric,

>> Notes:
>>   - At plaintext mode only, the user set a master key and the fscrypt
>>     driver derived from it the DEK and the key identifier.
>>   - 152c41b2ea39fa3d90ea06448456e7fb is the derived key identifier
>>   - Only on the first IO, nvme-rdma gets a callback to load the derived DEK.
>>
>> There is no special configuration to support crypto at nvme modules.
>>
>> Thanks
> 
> Very interesting work!  Can you Cc me on future versions?
> 
> I'm glad to see that this hardware allows all 16 IV bytes to be specified.
> 
> Does it also handle programming and evicting keys efficiently?
> 
> Also, just checking: have you tested that the ciphertext that this inline
> encryption hardware produces is correct?  That's always super important to test.
> There are xfstests that test for it, e.g. generic/582.  Another way to test it
> is to just manually test whether encrypted files that were created when the
> filesystem was mounted with '-o inlinecrypt' show the same contents when the
> filesystem is *not* mounted with '-o inlinecrypt' (or vice versa).
> 
> - Eric
> 

I'm wondering which are the xfstests that needs to run in order
to establish the correctness/stability apart from generic/582
this work ?

-ck