[dm-crypt] veritysetup support for files

Wesley Miaw wmiaw at netflix.com
Mon Aug 13 23:21:07 CEST 2012


On Aug 13, 2012, at 3:02 AM, Milan Broz wrote:

> On 08/10/2012 01:12 PM, Milan Broz wrote:
>> On 08/09/2012 07:27 PM, Wesley Miaw wrote:
>> 
>>> The result I need is one file that contains a filesystem image (this
>>> would have already been created ahead of time), a second file that
>>> contains the raw hash data for that filesystem image, and a third
>>> file containing the dm-verity table parameters. I am creating the
>>> last file by redirecting veritysetup stdout to a file.
>> 
>> Ah, ok. So your only request is that raw hash data image is created
>> automatically as file (if parameter is not a block device directly)
>> and that this file doesn't need to be pre-allocated, correct?
> 
> Can you try current git version?
> 
> I changed device helpers so loop is now allocated only when it is neccessary
> for device-mapper (where block device is always required).
> 
> Veritysetup now also create new hash image in format (if not already there).
> 
> It still need root privilege (in some command just to initialize DM) but
> I think it should works as you need now.
> 
> Let me know if it works for you please…

Works, great. Thanks, Milan! :)
--
Wesley Miaw

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