Re: [PATCH 0/6] block: add support for REQ_OP_VERIFY

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On 04.12.2022 20:29, Keith Busch wrote:
On Sat, Dec 03, 2022 at 07:19:17AM +0300, Javier González wrote:

> On 2 Dec 2022, at 17.58, Keith Busch <kbusch@xxxxxxxxxx> wrote:
>
> On Fri, Dec 02, 2022 at 08:16:30AM +0100, Hannes Reinecke wrote:
>>> On 12/1/22 20:39, Matthew Wilcox wrote:
>>> On Thu, Dec 01, 2022 at 06:12:46PM +0000, Chaitanya Kulkarni wrote:
>>>> So nobody can get away with a lie.
>>>
>>> And yet devices do exist which lie.  I'm not surprised that vendors
>>> vehemently claim that they don't, or "nobody would get away with it".
>>> But, of course, they do.  And there's no way for us to find out if
>>> they're lying!
>>>
>> But we'll never be able to figure that out unless we try.
>>
>> Once we've tried we will have proof either way.
>
> As long as the protocols don't provide proof-of-work, trying this
> doesn't really prove anything with respect to this concern.

Is this something we should bring to NVMe? Seems like the main disagreement can be addressed there.

Yeah, proof for the host appears to require a new feature, so we'd need
to bring this to the TWG. I can draft a TPAR if there's interest and
have ideas on how the feature could be implemented, but I currently
don't have enough skin in this game to sponser it.

Happy to review the TPAR, but I am in a similar situation.



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