Count dirty blocks and expose an API to get dirty count

This will manage dirty counter for each device and will allow to get the
dirty counter from above.

Signed-off-by: Liran Schour <lirans@il.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/block.h b/block.h
index ecf66c52ab..536265e86c 100644
--- a/block.h
+++ b/block.h
@@ -200,4 +200,5 @@ void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable);
 int bdrv_get_dirty(BlockDriverState *bs, int64_t sector);
 void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
                       int nr_sectors);
+int64_t bdrv_get_dirty_count(BlockDriverState *bs);
 #endif