This patchset adds support for online resizing of block devices. The first patch adds a new resize monitor command which call into the existing image resize code. This is the meat of the series and probably needs quite a bit of review and help as I'm not sure about how to implement the error handling for monitor commands correctly. Am I really supposed to add a new QERR_ definition for each possible error? And if yes how am I supposed to define them? The macros for them aren't exactly self-explaining.
The second patch adds a way to tell drivers about a resize, and the third one adds a guest notification for config changes to virtio-blk which allows the guest to pick it up without a rescan. I've just sent the corresponding Linux guest driver patch to Rusty.
