qcow2: Add two new fields to BDRVQcowState

Add two new fields regarding refcount information (the bit width of
every entry and the maximum refcount value) to the BDRVQcowState.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/block/qcow2.h b/block/qcow2.h
index 0fee29bb5e..55138c9d92 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -258,6 +258,8 @@ typedef struct BDRVQcowState {
     int qcow_version;
     bool use_lazy_refcounts;
     int refcount_order;
+    int refcount_bits;
+    uint64_t refcount_max;
 
     bool discard_passthrough[QCOW2_DISCARD_MAX];