[dm-devel] target that injects errors?

[Zach Brown <zab zabbo net>]

I find myself wanting to test a patch that reacts to EIO deep in aio
O_DIRECT.  Has anyone done a target that can inject errors into the IO
path?  I found sct's "testdrive", but it seems a bit crufty these days:

  http://people.redhat.com/sct/patches/testdrive/

If someone hasn't done this, I'll take a swing at it.

Thanks.

- z