Re: [dm-devel] [PATCH] dm: verity support data device offset (Linux 3.4.7)

[Milan Broz <mbroz redhat com>]

On 08/08/2012 08:46 PM, Mikulas Patocka wrote:

> The problem with the patch is that it changes interface to the userspace 
> tool. The userspace tool veritysetup already exists in recent cryptsetup 
> package, so we can't change the interface - you should change the patch so 
> that the starting data block is the last argument and the argument is 
> optional - so that it is compatible with the existing userspace too.

yes. Please never change interface without at least increasing target version.

I have to add userspace support as well to veritysetup and we need a way
how to detect that option is supported by running kernel.

Milan