On Tue 14 Jan 2020 02:47:53 PM CET, Max Reitz wrote: >> Yes, but does it make sense to try to support images with unaligned >> sizes if no one is going to create them ever and QEMU cannot even >> generate them? > > If nobody uses such images ever, isn’t the current code fine as-is?
I'll rephrase: 1. It is possible to have a qcow2 image with a size of 1 GB + 13 bytes (the size field in the qcow2 header allows it). 2. qemu-img cannot currently produce such images. 3. QEMU can open them but it gets the size wrong. 4. Fixing this in QEMU involves non-trivial changes (at least at the moment). 5. I don't think there's any use case for such images so instead of fixing QEMU I propose that we simply refuse to open them. Berto
