[v20,Resend,02/10] Backup: clear all bitmap when doing block checkpoint

Commit Message

Changlong Xie June 14, 2016, 7:53 a.m. UTC

From: Wen Congyang <[e-mail]>

Signed-off-by: Wen Congyang <[e-mail]>
Signed-off-by: zhanghailiang <[e-mail]>
Signed-off-by: Gonglei <[e-mail]>
Signed-off-by: Changlong Xie <[e-mail]>
---
 block/backup.c               | 18 ++++++++++++++++++
 include/block/block_backup.h |  3 +++
 2 files changed, 21 insertions(+)
 create mode 100644 include/block/block_backup.h

Patch

diff --git a/block/backup.c b/block/backup.c
index feeb9f8..baf3936 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"
@@ -246,6 +247,23 @@  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);