Am 06.03.2020 um 23:51 hat Eric Blake geschrieben: > For qcow2 and qed, we want to encourage the use of -F always, as these > formats can suffer from data corruption or security holes if backing > format is probed. But for other formats, the backing format cannot be > recorded. Making the user decide on a per-format basis whether to > supply a backing format string is awkward, better is to just blindly > accept a backing format argument even if it is ignored by the > contraints of the format at hand. > > Signed-off-by: Eric Blake <eblake@xxxxxxxxxx> I'm not sure if I agree with this reasoning. Accepting and silently ignoring -F could give users a false sense of security. If I specify a -F raw and QEMU later probes qcow2, that would be very surprising. Kevin
