[Libguestfs] Re: [PATCH nbdkit v2 0/5] vddk: do_extents: Avoid reading partial chunk beyond the end of the disk

In v2: - Cache the disk size in the handle, as Eric suggested in his review of v1 - Add a new patch to bail from the function if we hit the req_one condition. I wasn't convinced that we would always do the right thing in the req_one case. In particular, that we might add the extra extent in this case (which would be wrong since it would extend from the end of the last req_one extent to the end of the request). Bailing from the whole function avoids this possibility.