block: List anonymous device BBs in query-block

Instead of listing only monitor-owned BlockBackends in query-block, also
add those anonymous BlockBackends that are owned by a qdev device and as
such under the control of the user.

This allows using query-block to inspect BlockBackends for the modern
configuration syntax with -blockdev and -device.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/hmp.c b/hmp.c
index 0e57f47682..bf1de747d5 100644
--- a/hmp.c
+++ b/hmp.c
@@ -401,16 +401,16 @@ static void print_block_info(Monitor *mon, BlockInfo *info,
 
     assert(!info || !info->has_inserted || info->inserted == inserted);
 
-    if (info) {
+    if (info && *info->device) {
         monitor_printf(mon, "%s", info->device);
         if (inserted && inserted->has_node_name) {
             monitor_printf(mon, " (%s)", inserted->node_name);
         }
     } else {
-        assert(inserted);
+        assert(info || inserted);
         monitor_printf(mon, "%s",
-                       inserted->has_node_name
-                       ? inserted->node_name
+                       inserted && inserted->has_node_name ? inserted->node_name
+                       : info && info->has_qdev ? info->qdev
                        : "<anonymous>");
     }