qmp: add autoload parameter to block-dirty-bitmap-add

Optional. Default is false.
Signed-off-by: NVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: NDenis V. Lunev <den@openvz.org>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NJohn Snow <jsnow@redhat.com>
Message-id: 20170628120530.31251-25-vsementsov@virtuozzo.com
Signed-off-by: NMax Reitz <mreitz@redhat.com>

blockdev.c

@@ -1984,6 +1984,7 @@ static void block_dirty_bitmap_add_prepare(BlkActionState *common,
     qmp_block_dirty_bitmap_add(action->node, action->name,
                                action->has_granularity, action->granularity,
                                action->has_persistent, action->persistent,
+                               action->has_autoload, action->autoload,
                                &local_err);
 
     if (!local_err) {
@@ -2710,6 +2711,7 @@ out:
 void qmp_block_dirty_bitmap_add(const char *node, const char *name,
                                 bool has_granularity, uint32_t granularity,
                                 bool has_persistent, bool persistent,
+                                bool has_autoload, bool autoload,
                                 Error **errp)
 {
     BlockDriverState *bs;
@@ -2739,6 +2741,15 @@ void qmp_block_dirty_bitmap_add(const char *node, const char *name,
     if (!has_persistent) {
         persistent = false;
     }
+    if (!has_autoload) {
+        autoload = false;
+    }
+
+    if (has_autoload && !persistent) {
+        error_setg(errp, "Autoload flag must be used only for persistent "
+                         "bitmaps");
+        return;
+    }
 
     if (persistent &&
         !bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp))
@@ -2747,9 +2758,12 @@ void qmp_block_dirty_bitmap_add(const char *node, const char *name,
     }
 
     bitmap = bdrv_create_dirty_bitmap(bs, granularity, name, errp);
-    if (bitmap != NULL) {
-        bdrv_dirty_bitmap_set_persistance(bitmap, persistent);
+    if (bitmap == NULL) {
+        return;
     }
+
+    bdrv_dirty_bitmap_set_persistance(bitmap, persistent);
+    bdrv_dirty_bitmap_set_autoload(bitmap, autoload);
 }
 
 void qmp_block_dirty_bitmap_remove(const char *node, const char *name,

qapi/block-core.json

@@ -1558,11 +1558,15 @@
 #              Qcow2 disks support persistent bitmaps. Default is false for
 #              block-dirty-bitmap-add. (Since: 2.10)
 #
+# @autoload: the bitmap will be automatically loaded when the image it is stored
+#            in is opened. This flag may only be specified for persistent
+#            bitmaps. Default is false for block-dirty-bitmap-add. (Since: 2.10)
+#
 # Since: 2.4
 ##
 { 'struct': 'BlockDirtyBitmapAdd',
   'data': { 'node': 'str', 'name': 'str', '*granularity': 'uint32',
-            '*persistent': 'bool' } }
+            '*persistent': 'bool', '*autoload': 'bool' } }
 
 ##
 # @block-dirty-bitmap-add: