gfio: add trim UI support

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/gfio.h b/gfio.h
index dd75c8a..aa14e3c 100644
--- a/gfio.h
+++ b/gfio.h
@@ -32,6 +32,8 @@
 	GtkWidget *write_iops;
 	GtkWidget *cw_bw;
 	GtkWidget *cw_iops;
+	GtkWidget *trim_bw;
+	GtkWidget *trim_iops;
 };
 
 struct gfio_graphs {
@@ -41,9 +43,11 @@
 	struct graph *iops_graph;
 	graph_label_t read_iops;
 	graph_label_t write_iops;
+	graph_label_t trim_iops;
 	struct graph *bandwidth_graph;
 	graph_label_t read_bw;
 	graph_label_t write_bw;
+	graph_label_t trim_bw;
 };
 
 /*