Merge remote-tracking branch 'remotes/xtensa/tags/20170306-xtensa' into staging

[mirror_qemu.git] / block.c

diff --git a/block.c b/block.c
index 6440b61be6df8dbc310223f07c9bf9137bef2afb..f293ccb5af405b9f9cf88f4261b36f523de1f28f 100644 (file)
--- a/block.c
+++ b/block.c
@@ -2087,6 +2087,7 @@ static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *bs,
     int64_t total_size;
     QemuOpts *opts = NULL;
     BlockDriverState *bs_snapshot;
+    Error *local_err = NULL;
     int ret;
 
     /* if snapshot, we create a temporary backing file and open it
@@ -2136,7 +2137,12 @@ static BlockDriverState *bdrv_append_temp_snapshot(BlockDriverState *bs,
      * call bdrv_unref() on it), so in order to be able to return one, we have
      * to increase bs_snapshot's refcount here */
     bdrv_ref(bs_snapshot);
-    bdrv_append(bs_snapshot, bs);
+    bdrv_append(bs_snapshot, bs, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        ret = -EINVAL;
+        goto out;
+    }
 
     g_free(tmp_filename);
     return bs_snapshot;
@@ -2927,20 +2933,25 @@ static void change_parent_backing_link(BlockDriverState *from,
  * parents of bs_top after bdrv_append() returns. If the caller needs to keep a
  * reference of its own, it must call bdrv_ref().
  */
-void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top)
+void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top,
+                 Error **errp)
 {
+    Error *local_err = NULL;
+
     assert(!atomic_read(&bs_top->in_flight));
     assert(!atomic_read(&bs_new->in_flight));
 
-    bdrv_ref(bs_top);
+    bdrv_set_backing_hd(bs_new, bs_top, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        goto out;
+    }
 
     change_parent_backing_link(bs_top, bs_new);
-    /* FIXME Error handling */
-    bdrv_set_backing_hd(bs_new, bs_top, &error_abort);
-    bdrv_unref(bs_top);
 
     /* bs_new is now referenced by its new parents, we don't need the
      * additional reference any more. */
+out:
     bdrv_unref(bs_new);
 }