1 files changed, 39 insertions, 0 deletions
diff --git a/include/block/block_backup.h b/include/block/block_backup.h
new file mode 100644
index 0000000000..8a759477a3
--- /dev/null
+++ b/include/block/block_backup.h
@@ -0,0 +1,39 @@
+/*
+ * 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 <dietmar@proxmox.com>
+ *  Changlong Xie <xiecl.fnst@cn.fujitsu.com>
+ *
+ * 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"
+
+typedef struct CowRequest {
+    int64_t start;
+    int64_t end;
+    QLIST_ENTRY(CowRequest) list;
+    CoQueue wait_queue; /* coroutines blocked on this request */
+} CowRequest;
+
+void backup_wait_for_overlapping_requests(BlockJob *job, int64_t sector_num,
+                                          int nb_sectors);
+void backup_cow_request_begin(CowRequest *req, BlockJob *job,
+                              int64_t sector_num,
+                              int nb_sectors);
+void backup_cow_request_end(CowRequest *req);
+
+void backup_do_checkpoint(BlockJob *job, Error **errp);
+
+#endif