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From: Changlong Xie <xiecl.fnst@cn.fujitsu.com>
Date: Fri, 20 May 2016 15:36:12 +0800
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Subject: [Qemu-devel] [PATCH v19 02/10] Backup: clear all bitmap when doing
 block checkpoint
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To: qemu devel <qemu-devel@nongnu.org>, Stefan Hajnoczi <stefanha@redhat.com>, Fam Zheng <famz@redhat.com>, Max Reitz <mreitz@redhat.com>, Kevin Wolf <kwolf@redhat.com>, Jeff Cody <jcody@redhat.com>
Cc: qemu block <qemu-block@nongnu.org>, Paolo Bonzini <pbonzini@redhat.com>, John Snow <jsnow@redhat.com>, Eric Blake <eblake@redhat.com>, Markus Armbruster <armbru@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Dong Eddie <eddie.dong@intel.com>, Jiang Yunhong <yunhong.jiang@intel.com>, zhanghailiang <zhang.zhanghailiang@huawei.com>, Gonglei <arei.gonglei@huawei.com>, Wen Congyang <wency@cn.fujitsu.com>, Changlong Xie <xiecl.fnst@cn.fujitsu.com>

From: Wen Congyang <wency@cn.fujitsu.com>

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Changlong Xie <xiecl.fnst@cn.fujitsu.com>
---
 block/backup.c               | 18 ++++++++++++++++++
 include/block/block_backup.h |  3 +++
 2 files changed, 21 insertions(+)
 create mode 100644 include/block/block_backup.h

diff --git a/block/backup.c b/block/backup.c
index fec45e8..93bfd4c 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"
@@ -250,6 +251,23 @@ static void backup_abort(BlockJob *job)
     }
 }
 
+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..3753bcb
--- /dev/null
+++ b/include/block/block_backup.h
@@ -0,0 +1,3 @@
+#include "block/block_int.h"
+
+void backup_do_checkpoint(BlockJob *job, Error **errp);
-- 
1.9.3