diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c
index 4b441ac468..4dc07f71d4 100644
--- a/block/monitor/block-hmp-cmds.c
+++ b/block/monitor/block-hmp-cmds.c
@@ -725,7 +725,7 @@ static void print_block_info(Monitor *mon, BlockInfo *info,
         monitor_printf(mon, "\nImages:\n");
         image_info = inserted->image;
         while (1) {
-            bdrv_node_info_dump(qapi_ImageInfo_base(image_info), 0);
+            bdrv_node_info_dump(qapi_ImageInfo_base(image_info), 0, false);
             if (image_info->backing_image) {
                 image_info = image_info->backing_image;
             } else {
diff --git a/block/qapi.c b/block/qapi.c
index c6d46ee2e4..d52f1ab614 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -917,24 +917,49 @@ void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec,
     visit_free(v);
 }
 
-void bdrv_node_info_dump(BlockNodeInfo *info, int indentation)
+/**
+ * Print the given @info object in human-readable form.  Every field is indented
+ * using the given @indentation (four spaces per indentation level).
+ *
+ * When using this to print a whole block graph, @protocol can be set to true to
+ * signify that the given information is associated with a protocol node, i.e.
+ * just data storage for an image, such that the data it presents is not really
+ * a full VM disk.  If so, several fields change name: For example, "virtual
+ * size" is printed as "file length".
+ * (Consider a qcow2 image, which is represented by a qcow2 node and a file
+ * node.  Printing a "virtual size" for the file node does not make sense,
+ * because without the qcow2 node, it is not really a guest disk, so it does not
+ * have a "virtual size".  Therefore, we call it "file length" instead.)
+ *
+ * @protocol is ignored when @indentation is 0, because we take that to mean
+ * that the associated node is the root node in the queried block graph, and
+ * thus is always to be interpreted as a standalone guest disk.
+ */
+void bdrv_node_info_dump(BlockNodeInfo *info, int indentation, bool protocol)
 {
     char *size_buf, *dsize_buf;
     g_autofree char *ind_s = g_strdup_printf("%*s", indentation * 4, "");
 
+    if (indentation == 0) {
+        /* Top level, consider this a normal image */
+        protocol = false;
+    }
+
     if (!info->has_actual_size) {
         dsize_buf = g_strdup("unavailable");
     } else {
         dsize_buf = size_to_str(info->actual_size);
     }
     size_buf = size_to_str(info->virtual_size);
-    qemu_printf("%simage: %s\n"
-                "%sfile format: %s\n"
-                "%svirtual size: %s (%" PRId64 " bytes)\n"
+    qemu_printf("%s%s: %s\n"
+                "%s%s: %s\n"
+                "%s%s: %s (%" PRId64 " bytes)\n"
                 "%sdisk size: %s\n",
-                ind_s, info->filename,
-                ind_s, info->format,
-                ind_s, size_buf, info->virtual_size,
+                ind_s, protocol ? "filename" : "image", info->filename,
+                ind_s, protocol ? "protocol type" : "file format",
+                info->format,
+                ind_s, protocol ? "file length" : "virtual size",
+                size_buf, info->virtual_size,
                 ind_s, dsize_buf);
     g_free(size_buf);
     g_free(dsize_buf);
diff --git a/include/block/qapi.h b/include/block/qapi.h
index aa59880330..8773b9b191 100644
--- a/include/block/qapi.h
+++ b/include/block/qapi.h
@@ -51,5 +51,5 @@ void bdrv_snapshot_dump(QEMUSnapshotInfo *sn);
 void bdrv_image_info_specific_dump(ImageInfoSpecific *info_spec,
                                    const char *prefix,
                                    int indentation);
-void bdrv_node_info_dump(BlockNodeInfo *info, int indentation);
+void bdrv_node_info_dump(BlockNodeInfo *info, int indentation, bool protocol);
 #endif
diff --git a/qemu-img.c b/qemu-img.c
index 595179a346..7c05931866 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -2854,7 +2854,8 @@ static void dump_human_image_info(BlockGraphInfo *info, int indentation,
 {
     BlockChildInfoList *children_list;
 
-    bdrv_node_info_dump(qapi_BlockGraphInfo_base(info), indentation);
+    bdrv_node_info_dump(qapi_BlockGraphInfo_base(info), indentation,
+                        info->children == NULL);
 
     for (children_list = info->children; children_list;
          children_list = children_list->next)
diff --git a/tests/qemu-iotests/302.out b/tests/qemu-iotests/302.out
index edfa1c4f05..7b5014cdd8 100644
--- a/tests/qemu-iotests/302.out
+++ b/tests/qemu-iotests/302.out
@@ -5,9 +5,9 @@ file format: raw
 virtual size: 448 KiB (458752 bytes)
 disk size: unavailable
 Child node '/file':
-    image: nbd+unix:///exp?socket=SOCK_DIR/PID-nbd-sock
-    file format: nbd
-    virtual size: 448 KiB (458752 bytes)
+    filename: nbd+unix:///exp?socket=SOCK_DIR/PID-nbd-sock
+    protocol type: nbd
+    file length: 448 KiB (458752 bytes)
     disk size: unavailable
 
 === Converted image info ===