Am 22.06.2012 17:08, schrieb Stefan Hajnoczi: > This patch adds an incompatible feature bit to mark images that have not > been closed cleanly. When a dirty image file is opened a consistency > check and repair is performed. > > Signed-off-by: Stefan Hajnoczi <stefa...@linux.vnet.ibm.com> > --- > block/qcow2.c | 44 ++++++++++++++++++++++++++++++++++++++++++-- > block/qcow2.h | 3 +++ > 2 files changed, 45 insertions(+), 2 deletions(-)
> diff --git a/block/qcow2.h b/block/qcow2.h > index 455b6d7..5c7cfb6 100644 > --- a/block/qcow2.h > +++ b/block/qcow2.h > @@ -108,6 +108,9 @@ enum { > QCOW2_FEAT_TYPE_INCOMPATIBLE = 0, > QCOW2_FEAT_TYPE_COMPATIBLE = 1, > QCOW2_FEAT_TYPE_AUTOCLEAR = 2, > + > + QCOW2_INCOMPATIBLE_FEAT_DIRTY = 0x1, > + QCOW2_INCOMPATIBLE_FEAT_MASK = QCOW2_INCOMPATIBLE_FEAT_DIRTY, > }; I would use a separate enum for each of the three flag categories. Also, you should add a feature table entry for the dirty bit so that older qemu versions can display a useful error message. Kevin