server: Return the device name for device files.

dlls/ntoskrnl.exe/tests/ntoskrnl.c

@@ -511,7 +511,7 @@ static void test_object_info(void)
 
     status = NtQueryObject(device, ObjectNameInformation, buffer, sizeof(buffer), NULL);
     ok(!status, "got %#x\n", status);
-    todo_wine ok(compare_unicode_string(name_info->Name.Buffer, name_info->Name.Length, L"\\Device\\WineTestDriver"),
+    ok(compare_unicode_string(name_info->Name.Buffer, name_info->Name.Length, L"\\Device\\WineTestDriver"),
             "wrong name %s\n", debugstr_w(name_info->Name.Buffer));
 
     status = NtQueryObject(device, ObjectTypeInformation, buffer, sizeof(buffer), NULL);

server/device.c

@@ -184,6 +184,7 @@ struct device_file
 
 static void device_file_dump( struct object *obj, int verbose );
 static struct fd *device_file_get_fd( struct object *obj );
+static WCHAR *device_file_get_full_name( struct object *obj, data_size_t *len );
 static struct list *device_file_get_kernel_obj_list( struct object *obj );
 static int device_file_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
 static void device_file_destroy( struct object *obj );
@@ -208,7 +209,7 @@ static const struct object_ops device_file_ops =
     default_fd_map_access,            /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
-    no_get_full_name,                 /* get_full_name */
+    device_file_get_full_name,        /* get_full_name */
     no_lookup_name,                   /* lookup_name */
     no_link_name,                     /* link_name */
     NULL,                             /* unlink_name */
@@ -506,6 +507,12 @@ static struct fd *device_file_get_fd( struct object *obj )
     return (struct fd *)grab_object( file->fd );
 }
 
+static WCHAR *device_file_get_full_name( struct object *obj, data_size_t *len )
+{
+    struct device_file *file = (struct device_file *)obj;
+    return file->device->obj.ops->get_full_name( &file->device->obj, len );
+}
+
 static struct list *device_file_get_kernel_obj_list( struct object *obj )
 {
     struct device_file *file = (struct device_file *)obj;