[Qemu-block] [PATCH 10/25] block/dirty-bitmap: add autoload field to BdrvDirtyBitmap

[Vladimir Sementsov-Ogievskiy]

Mirror AUTO flag from Qcow2 bitmap in BdrvDirtyBitmap. This will be
needed in future, to save this flag back to Qcow2 for persistent
bitmaps.

Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
Reviewed-by: John Snow <address@hidden>
---
 block/dirty-bitmap.c         | 15 +++++++++++++++
 block/qcow2-bitmap.c         |  2 ++
 include/block/dirty-bitmap.h |  2 ++
 3 files changed, 19 insertions(+)

diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 90af372..a9dfce8 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -44,6 +44,8 @@ struct BdrvDirtyBitmap {
     int64_t size;               /* Size of the bitmap (Number of sectors) */
     bool disabled;              /* Bitmap is read-only */
     int active_iterators;       /* How many iterators are active */
+    bool autoload;              /* For persistent bitmaps: bitmap must be
+                                   autoloaded on image opening */
     QLIST_ENTRY(BdrvDirtyBitmap) list;
 };
 
@@ -70,6 +72,7 @@ void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap)
     assert(!bdrv_dirty_bitmap_frozen(bitmap));
     g_free(bitmap->name);
     bitmap->name = NULL;
+    bitmap->autoload = false;
 }
 
 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
@@ -238,6 +241,8 @@ BdrvDirtyBitmap 
*bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
     bitmap->name = NULL;
     successor->name = name;
     bitmap->successor = NULL;
+    successor->autoload = bitmap->autoload;
+    bitmap->autoload = false;
     bdrv_release_dirty_bitmap(bs, bitmap);
 
     return successor;
@@ -540,3 +545,13 @@ int64_t bdrv_get_meta_dirty_count(BdrvDirtyBitmap *bitmap)
 {
     return hbitmap_count(bitmap->meta);
 }
+
+void bdrv_dirty_bitmap_set_autoload(BdrvDirtyBitmap *bitmap, bool autoload)
+{
+    bitmap->autoload = autoload;
+}
+
+bool bdrv_dirty_bitmap_get_autoload(const BdrvDirtyBitmap *bitmap)
+{
+    return bitmap->autoload;
+}
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index e08e46e..f1ca799 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -697,6 +697,8 @@ void qcow2_load_autoloading_dirty_bitmaps(BlockDriverState 
*bs, Error **errp)
             if (bitmap == NULL) {
                 goto fail;
             }
+
+            bdrv_dirty_bitmap_set_autoload(bitmap, true);
             bm->flags |= BME_FLAG_IN_USE;
             created_dirty_bitmaps =
                     g_slist_append(created_dirty_bitmaps, bitmap);
diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h
index 1e17729..45a389a 100644
--- a/include/block/dirty-bitmap.h
+++ b/include/block/dirty-bitmap.h
@@ -75,4 +75,6 @@ void bdrv_dirty_bitmap_deserialize_ones(BdrvDirtyBitmap 
*bitmap,
                                         bool finish);
 void bdrv_dirty_bitmap_deserialize_finish(BdrvDirtyBitmap *bitmap);
 
+void bdrv_dirty_bitmap_set_autoload(BdrvDirtyBitmap *bitmap, bool autoload);
+bool bdrv_dirty_bitmap_get_autoload(const BdrvDirtyBitmap *bitmap);
 #endif
-- 
1.8.3.1