qcow2: Move sync out of qcow2_alloc_clusters

Signed-off-by: NKevin Wolf <kwolf@redhat.com>

block/qcow2-cluster.c

@@ -60,6 +60,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, int min_size)
         qemu_free(new_l1_table);
         return new_l1_table_offset;
     }
+    bdrv_flush(bs->file);
 
     BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_WRITE_TABLE);
     for(i = 0; i < s->l1_size; i++)
@@ -243,6 +244,7 @@ static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
     if (l2_offset < 0) {
         return l2_offset;
     }
+    bdrv_flush(bs->file);
 
     /* allocate a new entry in the l2 cache */
 
@@ -863,6 +865,7 @@ int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset,
         QLIST_REMOVE(m, next_in_flight);
         return cluster_offset;
     }
+    bdrv_flush(bs->file);
 
     /* save info needed for meta data update */
     m->offset = offset;

block/qcow2-refcount.c

@@ -629,8 +629,6 @@ int64_t qcow2_alloc_clusters(BlockDriverState *bs, int64_t size)
         return ret;
     }
 
-    bdrv_flush(bs->file);
-
     return offset;
 }
 
@@ -678,6 +676,8 @@ int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
             goto redo;
         }
     }
+
+    bdrv_flush(bs->file);
     return offset;
 }
 

block/qcow2-snapshot.c

@@ -138,6 +138,7 @@ static int qcow_write_snapshots(BlockDriverState *bs)
     snapshots_size = offset;
 
     snapshots_offset = qcow2_alloc_clusters(bs, snapshots_size);
+    bdrv_flush(bs->file);
     offset = snapshots_offset;
     if (offset < 0) {
         return offset;
@@ -271,6 +272,7 @@ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)
     if (l1_table_offset < 0) {
         goto fail;
     }
+    bdrv_flush(bs->file);
 
     sn->l1_table_offset = l1_table_offset;
     sn->l1_size = s->l1_size;