I would like to be able to restore a snapshot from a disk image file
with read only permissions, for example stored on a cdrom.
QEMU checks if an image supports snapshots (bdrv_can_snapshot, etc)
and will fail if the disk is read only. As a quick test, I patched
out these checks and QEMU will bo
So I'm very unfamiliar with the QEMU codebase, but it seems like there
was a bug introduced recently that causes -snapshot to no longer work.
Maybe I'm missing something, and the semantics have just changed
since multiple snapshot support?
Anyway, rev 1.29 to block.c
(http://cvs.savannah.gnu.org/
