add basic backup support to block driver

[qemu.git] / backup.h

diff --git a/backup.h b/backup.h
new file mode 100644 (file)
index 0000000..9b1ea1c
--- /dev/null
+++ b/backup.h
@@ -0,0 +1,30 @@
+/*
+ * QEMU backup related definitions
+ *
+ * Copyright (C) 2013 Proxmox Server Solutions
+ *
+ * Authors:
+ *  Dietmar Maurer (dietmar@proxmox.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 QEMU_BACKUP_H
+#define QEMU_BACKUP_H
+
+#define BACKUP_CLUSTER_BITS 16
+#define BACKUP_CLUSTER_SIZE (1<<BACKUP_CLUSTER_BITS)
+#define BACKUP_BLOCKS_PER_CLUSTER (BACKUP_CLUSTER_SIZE/BDRV_SECTOR_SIZE)
+
+typedef int BackupDumpFunc(void *opaque, BlockDriverState *bs,
+                           int64_t cluster_num, unsigned char *buf);
+
+void backup_job_start(BlockDriverState *bs, bool cancel);
+
+int backup_job_create(BlockDriverState *bs, BackupDumpFunc *backup_dump_cb,
+                      BlockDriverCompletionFunc *backup_complete_cb,
+                      void *opaque, int64_t speed);
+
+#endif /* QEMU_BACKUP_H */