4 files changed, 15 insertions, 3 deletions
diff --git a/include/backend/drm/drm.h b/include/backend/drm/drm.h
index 278c387c..72671f45 100644
--- a/include/backend/drm/drm.h
+++ b/include/backend/drm/drm.h
@@ -143,4 +143,6 @@ int wlr_drm_event(int fd, uint32_t mask, void *data);
 
 void wlr_drm_connector_start_renderer(struct wlr_drm_connector *conn);
 
+struct wlr_session *wlr_drm_backend_get_session(struct wlr_backend *backend);
+
 #endif
diff --git a/include/backend/multi.h b/include/backend/multi.h
index 2798048d..3363c608 100644
--- a/include/backend/multi.h
+++ b/include/backend/multi.h
@@ -9,10 +9,14 @@
 struct wlr_multi_backend {
 	struct wlr_backend backend;
 
-	struct wlr_session *session;
 	struct wl_list backends;
 
 	struct wl_listener display_destroy;
+
+	struct {
+		struct wl_signal backend_add;
+		struct wl_signal backend_remove;
+	} events;
 };
 
 #endif
diff --git a/include/wlr/backend.h b/include/wlr/backend.h
index 2c8fd982..4632dcbf 100644
--- a/include/wlr/backend.h
+++ b/include/wlr/backend.h
@@ -11,6 +11,7 @@ struct wlr_backend {
 	const struct wlr_backend_impl *impl;
 
 	struct {
+		struct wl_signal destroy;
 		struct wl_signal input_add;
 		struct wl_signal input_remove;
 		struct wl_signal output_add;
diff --git a/include/wlr/backend/multi.h b/include/wlr/backend/multi.h
index e56b07b1..d9914efc 100644
--- a/include/wlr/backend/multi.h
+++ b/include/wlr/backend/multi.h
@@ -4,13 +4,18 @@
 #include <wlr/backend.h>
 #include <wlr/backend/session.h>
 
-struct wlr_backend *wlr_multi_backend_create(struct wl_display *display,
-	struct wlr_session *session);
+struct wlr_backend *wlr_multi_backend_create(struct wl_display *display);
+
 void wlr_multi_backend_add(struct wlr_backend *multi,
 	struct wlr_backend *backend);
 
+void wlr_multi_backend_remove(struct wlr_backend *multi,
+	struct wlr_backend *backend);
+
 bool wlr_backend_is_multi(struct wlr_backend *backend);
 
 struct wlr_session *wlr_multi_get_session(struct wlr_backend *base);
 
+bool wlr_multi_is_empty(struct wlr_backend *backend);
+
 #endif