This adds three qmp commands to transactions.
Users can stop a dirty bitmap, start backup of it, and start another
dirty bitmap atomically, so that the dirty bitmap is tracked
incrementally and we don't miss any write.
Signed-off-by: Fam Zheng <address@hidden>
---
blockdev.c | 92
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
qapi-schema.json | 5 ++-
2 files changed, 96 insertions(+), 1 deletion(-)
diff --git a/blockdev.c b/blockdev.c
index fca909b..34fa314 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1490,6 +1490,83 @@ static void
drive_backup_abort(BlkTransactionState *common)
}
}
+static void block_dirty_bitmap_add_prepare(BlkTransactionState
*common,
+ Error **errp)
+{
+ BlockDirtyBitmapAdd *action;
+
+ action = common->action->block_dirty_bitmap_add;
+ qmp_block_dirty_bitmap_add(action->device, action->name,
+ action->has_granularity,
action->granularity,
+ errp);
+}
+
+static void block_dirty_bitmap_add_abort(BlkTransactionState *common)
+{
+ BlockDirtyBitmapAdd *action;
+ BdrvDirtyBitmap *bm;
+ BlockDriverState *bs;
+
+ action = common->action->block_dirty_bitmap_add;
+ bs = bdrv_find(action->device);
+ if (bs) {
+ bm = bdrv_find_dirty_bitmap(bs, action->name);
+ if (bm) {
+ bdrv_release_dirty_bitmap(bs, bm);
+ }
+ }
+}
+
+static void block_dirty_bitmap_enable_prepare(BlkTransactionState
*common,
+ Error **errp)
+{
+ BlockDirtyBitmap *action;
+
+ action = common->action->block_dirty_bitmap_enable;
+ qmp_block_dirty_bitmap_enable(action->device, action->name, errp);
+}
+
+static void block_dirty_bitmap_enable_abort(BlkTransactionState
*common)
+{
+ BlockDirtyBitmap *action;
+ BdrvDirtyBitmap *bitmap;
+ BlockDriverState *bs;
+
+ action = common->action->block_dirty_bitmap_enable;
+ bs = bdrv_find(action->device);
+ if (bs) {
+ bitmap = bdrv_find_dirty_bitmap(bs, action->name);
+ if (bitmap) {
+ bdrv_disable_dirty_bitmap(bs, bitmap);