[dm-devel] Latest dm-userspace userspace code

[Dan Smith]

I have attached the latest userspace enabling code for dm-userspace.
I have made quite a lot of changes to the library code (dmu.{c,h})
which I think makes it cleaner.  I have also added the ability to
return 0 from handler functions and submit maps or endios later, which
should allow us to increase performance in cases where operations
cannot be completed sequentially.

If this looks good, I can post a real patch against libdevmapper.

I will also plan to post an updated version of my cowd application a
bit later, once all the changes have been integrated.

Comments are greatly appreciated!

Signed-off-by: Dan Smith <danms at us.ibm.com>

-- 
Dan Smith
IBM Linux Technology Center
Open Hypervisor Team
email: danms at us.ibm.com

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