[Qemu-devel] [PULL 06/17] Backup: clear all bitmap when doing block checkpoint

[Stefan Hajnoczi]

From: Wen Congyang <address@hidden>

Signed-off-by: Wen Congyang <address@hidden>
Signed-off-by: Changlong Xie <address@hidden>
Signed-off-by: Wang WeiWei <address@hidden>
Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Gonglei <address@hidden>
Reviewed-by: Stefan Hajnoczi <address@hidden>
Message-id: address@hidden
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
 block/backup.c               | 18 ++++++++++++++++++
 include/block/block_backup.h | 25 +++++++++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 include/block/block_backup.h

diff --git a/block/backup.c b/block/backup.c
index bb3bb9a..dbe54e2 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -17,6 +17,7 @@
 #include "block/block.h"
 #include "block/block_int.h"
 #include "block/blockjob.h"
+#include "block/block_backup.h"
 #include "qapi/error.h"
 #include "qapi/qmp/qerror.h"
 #include "qemu/ratelimit.h"
@@ -255,6 +256,23 @@ static void backup_attached_aio_context(BlockJob *job, 
AioContext *aio_context)
     blk_set_aio_context(s->target, aio_context);
 }
 
+void backup_do_checkpoint(BlockJob *job, Error **errp)
+{
+    BackupBlockJob *backup_job = container_of(job, BackupBlockJob, common);
+    int64_t len;
+
+    assert(job->driver->job_type == BLOCK_JOB_TYPE_BACKUP);
+
+    if (backup_job->sync_mode != MIRROR_SYNC_MODE_NONE) {
+        error_setg(errp, "The backup job only supports block checkpoint in"
+                   " sync=none mode");
+        return;
+    }
+
+    len = DIV_ROUND_UP(backup_job->common.len, backup_job->cluster_size);
+    bitmap_zero(backup_job->done_bitmap, len);
+}
+
 static const BlockJobDriver backup_job_driver = {
     .instance_size          = sizeof(BackupBlockJob),
     .job_type               = BLOCK_JOB_TYPE_BACKUP,
diff --git a/include/block/block_backup.h b/include/block/block_backup.h
new file mode 100644
index 0000000..157596c
--- /dev/null
+++ b/include/block/block_backup.h
@@ -0,0 +1,25 @@
+/*
+ * QEMU backup
+ *
+ * Copyright (c) 2013 Proxmox Server Solutions
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2016 Intel Corporation
+ * Copyright (c) 2016 FUJITSU LIMITED
+ *
+ * Authors:
+ *  Dietmar Maurer <address@hidden>
+ *  Changlong Xie <address@hidden>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef BLOCK_BACKUP_H
+#define BLOCK_BACKUP_H
+
+#include "block/block_int.h"
+
+void backup_do_checkpoint(BlockJob *job, Error **errp);
+
+#endif
-- 
2.7.4