diff mbox series

[03/13] block: Freeze the backing chain for the duration of the mirror job

Message ID d18240fa21ee7a765c33c958ee5d4605b59d452a.1547739122.git.berto@igalia.com (mailing list archive)
State New, archived
Headers show
Series Add a 'x-blockdev-reopen' QMP command | expand

Commit Message

Alberto Garcia Jan. 17, 2019, 3:33 p.m. UTC 
Signed-off-by: Alberto Garcia <berto@igalia.com>
---
 block/mirror.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/block/mirror.c b/block/mirror.c
index 22bef9f7e9..afbc30da61 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -630,6 +630,10 @@  static int mirror_exit_common(Job *job)
     }
     s->prepared = true;
 
+    if (bdrv_chain_contains(src, target_bs)) {
+        bdrv_unfreeze_backing_chain(mirror_top_bs, target_bs);
+    }
+
     bdrv_release_dirty_bitmap(src, s->dirty_bitmap);
 
     /* Make sure that the source BDS doesn't go away during bdrv_replace_node,
@@ -1641,6 +1645,10 @@  static void mirror_start_job(const char *job_id, BlockDriverState *bs,
                 goto fail;
             }
         }
+
+        if (bdrv_freeze_backing_chain(mirror_top_bs, target, errp) < 0) {
+            goto fail;
+        }
     }
 
     QTAILQ_INIT(&s->ops_in_flight);