On Thu, Sep 01, 2011 at 02:27:55PM +0100, Daniel P. Berrange wrote: > I see two likely approaches: > > 1. Add a parameter to the existing 'block_resize' command > 'refreshonly=true|false' > > 2. Add a separate command 'block_refresh'
I think all that you need is a to implement a bdrv_truncate method for host devices that simply checks if the new size smaller or equal to the device size, and return 0 in that case or an error otherwise.
