On Wed, Dec 03, 2014 at 02:37:45PM +0100, Max Reitz wrote: > If a reference count is not representable with the current refcount > order, the image check should point to qemu-img amend for increasing the > refcount order. However, qemu-img amend needs write access to the image > which cannot be provided if the image is marked corrupt; and the image > check will not mark the image consistent unless everything actually is > consistent. > > Therefore, if an image is marked corrupt and the image check encounters > a reference count overflow, it cannot be fixed by using qemu-img amend > to increase the refcount order. Instead, one has to use qemu-img convert > to create a completely new copy of the image in this case. > > Alternatively, we may want to give the user a way of manually removing > the corrupt flag, maybe through qemu-img amend, but this is not part of > this patch. > > Signed-off-by: Max Reitz <mre...@redhat.com> > Reviewed-by: Eric Blake <ebl...@redhat.com> > --- > block/qcow2-refcount.c | 3 +++ > 1 file changed, 3 insertions(+)
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
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