tree 1f5682543ab259a5cb9b4a8ef270076c48e1970e
parent 74c4510a3cf7c369ee524c6f8fa8a87cf08ba608
author Stefan Hajnoczi <stefanha@redhat.com> 1362405750 +0100
committer Stefan Hajnoczi <stefanha@redhat.com> 1363360069 +0100

qcow2: flush refcount cache correctly in alloc_refcount_block()

update_refcount() affects the refcount cache, it does not write to disk.
Therefore bdrv_flush(bs->file) does nothing.  We need to flush the
refcount cache in order to write out the refcount updates!

While we're here also add error returns when qcow2_cache_flush() fails.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>