[v18,2/8] Backup: clear all bitmap when doing block checkpoint

Commit Message

Changlong Xie April 15, 2016, 8:10 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            | 17 +++++++++++++++++
 include/block/block_int.h |  2 ++
 2 files changed, 19 insertions(+)

Patch

diff --git a/block/backup.c b/block/backup.c
index 491fd14..d5ffc32 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -259,6 +259,23 @@  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_int.h b/include/block/block_int.h
index 7e238a0..3c3caa7 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -718,6 +718,8 @@  BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
                                   const BdrvChildRole *child_role);
 void bdrv_root_unref_child(BdrvChild *child);
 
+void backup_do_checkpoint(BlockJob *job, Error **errp);
+
 void blk_dev_change_media_cb(BlockBackend *blk, bool load);
 bool blk_dev_has_removable_media(BlockBackend *blk);
 bool blk_dev_has_tray(BlockBackend *blk);