commit 20a63d2cec838c2dde4d246c4d7abe747d9b7a11
author Fam Zheng <famz@redhat.com> Mon Dec 16 14:45:31 2013 +0800
committer Stefan Hajnoczi <stefanha@redhat.com> Fri Dec 20 16:26:16 2013 +0100
tree 636439f43d5e1703cd0d88e5187bdf40ac15bf78
parent 03544a6e9ecc1be115e8a29bd929f83b467d4816

commit: Support commit active layer

If active is top, it will be mirrored to base, (with block/mirror.c
code), then the image is switched when user completes the block job.

QMP documentation is updated.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

blockdev.c

diff --git a/blockdev.c b/blockdev.c
index 6a85961..2c3242b 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1820,8 +1820,13 @@
         return;
     }
 
-    commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
-                &local_err);
+    if (top_bs == bs) {
+        commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
+                            bs, &local_err);
+    } else {
+        commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
+                    &local_err);
+    }
     if (local_err != NULL) {
         error_propagate(errp, local_err);
         return;