qed: add migration blocker (v2)

Now when you try to migrate with qed, you get:

(qemu) migrate tcp:localhost:1025
Block format 'qed' used by device 'ide0-hd0' does not support feature 'live migration'
(qemu)

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/qerror.h b/qerror.h
index 7e2eebf..2d3d43b 100644
--- a/qerror.h
+++ b/qerror.h
@@ -54,6 +54,9 @@ QError *qobject_to_qerror(const QObject *obj);
 #define QERR_BAD_BUS_FOR_DEVICE \
     "{ 'class': 'BadBusForDevice', 'data': { 'device': %s, 'bad_bus_type': %s } }"
 
+#define QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED \
+    "{ 'class': 'BlockFormatFeatureNotSupported', 'data': { 'format': %s, 'name': %s, 'feature': %s } }"
+
 #define QERR_BUS_NOT_FOUND \
     "{ 'class': 'BusNotFound', 'data': { 'bus': %s } }"