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Re: [dm-devel] dm-bufio



On Fri, Mar 23, 2012 at 11:32 PM, Mike Snitzer <snitzer redhat com> wrote:
> On Fri, Mar 23 2012 at 11:17am -0400,
> Kasatkin, Dmitry <dmitry kasatkin intel com> wrote:
>
>> On Fri, Mar 23, 2012 at 4:32 PM, Mike Snitzer <snitzer redhat com> wrote:
>> > As an aside, just curious: what does your target do?
>>
>> I have experimented with integrity protection.
>
> Interesting.  Are you aware that a new integrity target has been
> developed and is approaching upstream inclussion?  It is called
> dm-verity.
>
> Mikulas posted the most recent version here:
> http://www.redhat.com/archives/dm-devel/2012-March/msg00133.html
>
> And here is the userspace setup code:
> http://www.redhat.com/archives/dm-devel/2012-March/msg00134.html
>
> The original docs from Google's initial dm-verity are mostly applicable
> (but need to be refreshed and included with the new version):
> http://www.redhat.com/archives/dm-devel/2012-February/msg00119.html
>
> dm-verity already has 2 formats, a 3rd could be added if you found the
> existing formats somehow lacking, see:
> http://www.redhat.com/archives/dm-devel/2012-March/msg00143.html
>
> Mike

Hi,

Yes.. I am aware of dm-verity target.
It suites well for read-only cases.
It is questionable how tree-based approach will work with read-write.
Each single update will cause whole tree recalculation.

- Dmitry


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