[Qemu-devel] [PATCH 17/21] qmp: add autoload parameter to block-dirty-bitmap-add

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

Optional. Default is false.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
---
 blockdev.c            | 18 ++++++++++++++++--
 docs/qmp-commands.txt |  4 ++++
 qapi/block-core.json  |  6 +++++-
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/blockdev.c b/blockdev.c
index de372ed..db2bdbb 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1962,6 +1962,7 @@ 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) {
@@ -2690,6 +2691,7 @@ 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)
 {
     AioContext *aio_context;
@@ -2723,6 +2725,15 @@ 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");
+        goto out;
+    }
 
     if (persistent &&
             !bdrv_can_store_dirty_bitmap(bs, name, granularity, errp)) {
@@ -2730,10 +2741,13 @@ 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) {
+        goto out;
     }
 
+    bdrv_dirty_bitmap_set_persistance(bitmap, persistent);
+    bdrv_dirty_bitmap_set_autoload(bitmap, autoload);
+
  out:
     aio_context_release(aio_context);
 }
diff --git a/docs/qmp-commands.txt b/docs/qmp-commands.txt
index bfb5df6..13e9635 100644
--- a/docs/qmp-commands.txt
+++ b/docs/qmp-commands.txt
@@ -1008,6 +1008,10 @@ Arguments:
 - "persistent": bitmap will be saved to the corresponding block device image
                 file on its close. For now only Qcow2 disks support persistent
                 bitmaps. (json-bool, optional, default false) (Since 2.8)
+- "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 (json-bool, optional, default false)
+              (Since 2.8)
 
 Example:
 
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 134e77e..2c33a30 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1235,11 +1235,15 @@
 #              corresponding block device image file on its close. Default is
 #              false. (Since 2.8)
 #
+# @autoload: #optional 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. (Since 2.8)
+#
 # Since 2.4
 ##
 { 'struct': 'BlockDirtyBitmapAdd',
   'data': { 'node': 'str', 'name': 'str', '*granularity': 'uint32',
-            '*persistent': 'bool' } }
+            '*persistent': 'bool', '*autoload': 'bool' } }
 
 ##
 # @block-dirty-bitmap-add
-- 
1.8.3.1