[PATCH v1] block/stream:add flush l2_table_cache, ensure data integrity

[Evanzhang <Evanzhang@archeros.com>]

block_stream will not actively flush l2_table_cache,when qemu
process exception exit,causing disk data loss

Signed-off-by: Evanzhang <Evanzhang@archeros.com>
---
 block/stream.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/block/stream.c b/block/stream.c
index e522bbd..a5e08da 100644
--- a/block/stream.c
+++ b/block/stream.c
@@ -207,6 +207,12 @@ static int coroutine_fn stream_run(Job *job, Error **errp)
         }
     }
 
+    /*
+     * Complete stream_populate,force flush l2_table_cache,to
+     * avoid unexpected termination of process, l2_table loss
+     */
+    qcow2_cache_flush(bs, ((BDRVQcow2State *)bs->opaque)->l2_table_cache);
+
     /* Do not remove the backing file if an error was there but ignored. */
     return error;
 }
-- 
2.9.5