> In short, the idea is that you can stick filters on top of a > BlockDriverState, so > that any read/writes (and possibly more requests, if necessary) are routed > through the filter before they are passed to the block driver of this BDS. > Filters would be implemented as BlockDrivers, i.e. you could implement > .bdrv_co_write() in a filter to intercept all writes to an image.
I am quite unsure if that make things easier.
