drbd: Move drbd_send_ping() and drbd_send_ping_ack() to drbd_main.c

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index a1deab6..d982861 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -765,6 +765,18 @@
 	return err;
 }
 
+int drbd_send_ping(struct drbd_tconn *tconn)
+{
+	struct p_header h;
+	return !conn_send_cmd(tconn, 0, &tconn->meta, P_PING, &h, sizeof(h));
+}
+
+int drbd_send_ping_ack(struct drbd_tconn *tconn)
+{
+	struct p_header h;
+	return !conn_send_cmd(tconn, 0, &tconn->meta, P_PING_ACK, &h, sizeof(h));
+}
+
 int drbd_send_sync_param(struct drbd_conf *mdev)
 {
 	struct p_rs_param_95 *p;