[Qemu-devel] [PATCH v2 07/11] block: hold hard reference for backup/mirror target

[Fam Zheng]

Signed-off-by: Fam Zheng <f...@redhat.com>
---
 block/backup.c | 3 ++-
 block/mirror.c | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/block/backup.c b/block/backup.c
index 16105d4..b82f601 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -294,7 +294,7 @@ static void coroutine_fn backup_run(void *opaque)
     hbitmap_free(job->bitmap);
 
     bdrv_iostatus_disable(target);
-    bdrv_delete(target);
+    bdrv_unref(target, true);
 
     block_job_completed(&job->common, ret);
 }
@@ -332,6 +332,7 @@ void backup_start(BlockDriverState *bs, BlockDriverState 
*target,
         return;
     }
 
+    bdrv_ref(target, true);
     job->on_source_error = on_source_error;
     job->on_target_error = on_target_error;
     job->target = target;
diff --git a/block/mirror.c b/block/mirror.c
index bed4a7e..decdedb 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -479,8 +479,7 @@ immediate_exit:
         }
         bdrv_swap(s->target, s->common.bs);
     }
-    bdrv_close(s->target);
-    bdrv_delete(s->target);
+    bdrv_unref(s->target, true);
     block_job_completed(&s->common, ret);
 }
 
@@ -574,6 +573,7 @@ void mirror_start(BlockDriverState *bs, BlockDriverState 
*target,
     s->granularity = granularity;
     s->buf_size = MAX(buf_size, granularity);
 
+    bdrv_ref(target, true);
     bdrv_set_dirty_tracking(bs, granularity);
     bdrv_set_enable_write_cache(s->target, true);
     bdrv_set_on_error(s->target, on_target_error, on_target_error);
-- 
1.8.3.2