On Mon, Jul 09, 2012 at 04:54:08PM +0800, Wenchao Xia wrote: > Hi, Paolo and folks, > qemu have good capabilities to access different virtual disks, I want > to expose its block layer API to let 3rd party program linked in, such > as management stack or block tools, to access images data directly. > > Following is the objects: > (1) API to write/read block device at offset. > (2) Determine the image type,qcow2/qed/raw > (3) Determine which blocks are allocated. > (4) Determine backing file.
Sounds like you want a procedural interface for that. At least for (1) I have patches I'll submit soon to add qemu img read/write commands.
