Merge pull request #29 from ascent12/session

Moved session into backend/session and changed ownership

36 files changed, 121 insertions, 70 deletions

diff --git a/backend/backend.c b/backend/backend.c
index a391b272..4da3fe7a 100644
--- a/backend/backend.c
+++ b/backend/backend.c
@@ -4,7 +4,7 @@
 #include <string.h>
 #include <errno.h>
 #include <libinput.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/backend/interface.h>
 #include <wlr/backend/drm.h>
 #include <wlr/backend/libinput.h>
@@ -62,8 +62,7 @@ static struct wlr_backend *attempt_wl_backend(struct wl_display *display) {
 	return backend;
 }
 
-struct wlr_backend *wlr_backend_autocreate(struct wl_display *display,
-		struct wlr_session *session) {
+struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) {
 	struct wlr_backend *backend;
 	if (getenv("WAYLAND_DISPLAY") || getenv("_WAYLAND_DISPLAY")) {
 		backend = attempt_wl_backend(display);
@@ -71,43 +70,61 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display,
 			return backend;
 		}
 	}
+
+	if (getenv("DISPLAY")) {
+		wlr_log(L_ERROR, "X11 backend is not implemented"); // TODO
+		return NULL;
+	}
+
 	// Attempt DRM+libinput
-	struct wlr_udev *udev;
-	if (!(udev = wlr_udev_create(display))) {
+
+	struct wlr_session *session = wlr_session_start(display);
+	if (!session) {
+		wlr_log(L_ERROR, "Failed to start a DRM session");
+		return NULL;
+	}
+
+	struct wlr_udev *udev = wlr_udev_create(display);
+	if (!udev) {
 		wlr_log(L_ERROR, "Failed to start udev");
-		goto error;
+		goto error_session;
 	}
+
 	int gpu = wlr_udev_find_gpu(udev, session);
 	if (gpu == -1) {
 		wlr_log(L_ERROR, "Failed to open DRM device");
 		goto error_udev;
 	}
-	backend = wlr_multi_backend_create();
+
+	backend = wlr_multi_backend_create(session, udev);
 	if (!backend) {
 		goto error_gpu;
 	}
-	struct wlr_backend *libinput =
-		wlr_libinput_backend_create(display, session, udev);
+
+	struct wlr_backend *libinput = wlr_libinput_backend_create(display, session, udev);
 	if (!libinput) {
 		goto error_multi;
 	}
-	struct wlr_backend *drm =
-		wlr_drm_backend_create(display, session, udev, gpu);
+
+	struct wlr_backend *drm = wlr_drm_backend_create(display, session, udev, gpu);
 	if (!drm) {
 		goto error_libinput;
 	}
+
 	wlr_multi_backend_add(backend, libinput);
 	wlr_multi_backend_add(backend, drm);
 	return backend;
+
 error_libinput:
 	wlr_backend_destroy(libinput);
 error_multi:
 	wlr_backend_destroy(backend);
 error_gpu:
-	close(gpu);
+	wlr_session_close_file(session, gpu);
 error_udev:
 	wlr_udev_destroy(udev);
-error:
+error_session:
+	wlr_session_finish(session);
 	return NULL;
 }
 
diff --git a/backend/drm/backend.c b/backend/drm/backend.c
index d52adba9..a2c71317 100644
--- a/backend/drm/backend.c
+++ b/backend/drm/backend.c
@@ -7,7 +7,7 @@
 #include <wayland-server.h>
 #include <xf86drm.h>
 #include <sys/stat.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/backend/interface.h>
 #include <wlr/interfaces/wlr_output.h>
 #include <wlr/util/list.h>
diff --git a/backend/libinput/backend.c b/backend/libinput/backend.c
index a3523dc0..68f1752b 100644
--- a/backend/libinput/backend.c
+++ b/backend/libinput/backend.c
@@ -1,7 +1,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <libinput.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/backend/interface.h>
 #include <wlr/util/log.h>
 #include "backend/udev.h"
diff --git a/backend/libinput/events.c b/backend/libinput/events.c
index 6cd33e3d..9fe81782 100644
--- a/backend/libinput/events.c
+++ b/backend/libinput/events.c
@@ -1,7 +1,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <libinput.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/interfaces/wlr_input_device.h>
 #include <wlr/util/list.h>
 #include <wlr/util/log.h>
diff --git a/backend/libinput/keyboard.c b/backend/libinput/keyboard.c
index f19d7120..957cc3f2 100644
--- a/backend/libinput/keyboard.c
+++ b/backend/libinput/keyboard.c
@@ -1,7 +1,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <libinput.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_input_device.h>
 #include <wlr/interfaces/wlr_keyboard.h>
 #include <wlr/util/log.h>
diff --git a/backend/libinput/pointer.c b/backend/libinput/pointer.c
index 57c417c8..59e219d8 100644
--- a/backend/libinput/pointer.c
+++ b/backend/libinput/pointer.c
@@ -1,7 +1,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <libinput.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_input_device.h>
 #include <wlr/interfaces/wlr_pointer.h>
 #include <wlr/util/log.h>
diff --git a/backend/libinput/tablet_pad.c b/backend/libinput/tablet_pad.c
index 5517fa63..9bf45ba6 100644
--- a/backend/libinput/tablet_pad.c
+++ b/backend/libinput/tablet_pad.c
@@ -1,7 +1,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <libinput.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_input_device.h>
 #include <wlr/interfaces/wlr_tablet_pad.h>
 #include <wlr/util/log.h>
diff --git a/backend/libinput/tablet_tool.c b/backend/libinput/tablet_tool.c
index 95bdd3fd..9bbb0e34 100644
--- a/backend/libinput/tablet_tool.c
+++ b/backend/libinput/tablet_tool.c
@@ -1,7 +1,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <libinput.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_input_device.h>
 #include <wlr/interfaces/wlr_tablet_tool.h>
 #include <wlr/util/log.h>
diff --git a/backend/libinput/touch.c b/backend/libinput/touch.c
index c002b6a0..e0e866b0 100644
--- a/backend/libinput/touch.c
+++ b/backend/libinput/touch.c
@@ -1,7 +1,7 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <libinput.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_input_device.h>
 #include <wlr/interfaces/wlr_touch.h>
 #include <wlr/util/log.h>
diff --git a/backend/meson.build b/backend/meson.build
index 02b79e65..dc5a3d66 100644
--- a/backend/meson.build
+++ b/backend/meson.build
@@ -2,6 +2,9 @@ wlr_files += files(
     'backend.c',
     'egl.c',
     'udev.c',
+    'session/direct-ipc.c',
+    'session/direct.c',
+    'session/session.c',
     'drm/backend.c',
     'drm/drm.c',
     'libinput/backend.c',
@@ -17,3 +20,7 @@ wlr_files += files(
     'wayland/registry.c',
     'wayland/wl_seat.c',
 )
+
+if dep_systemd.found()
+    wlr_files += files('session/logind.c')
+endif
diff --git a/backend/multi/backend.c b/backend/multi/backend.c
index d33d137c..19839629 100644
--- a/backend/multi/backend.c
+++ b/backend/multi/backend.c
@@ -1,6 +1,8 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <wlr/backend/interface.h>
+#include <wlr/backend/udev.h>
+#include <wlr/backend/session.h>
 #include <wlr/util/log.h>
 #include "backend/multi.h"
 
@@ -31,6 +33,8 @@ static void multi_backend_destroy(struct wlr_backend_state *state) {
 		free(sub);
 	}
 	list_free(state->backends);
+	wlr_session_finish(state->session);
+	wlr_udev_destroy(state->udev);
 	free(state);
 }
 
@@ -39,24 +43,33 @@ struct wlr_backend_impl backend_impl = {
 	.destroy = multi_backend_destroy
 };
 
-struct wlr_backend *wlr_multi_backend_create() {
+struct wlr_backend *wlr_multi_backend_create(struct wlr_session *session,
+		struct wlr_udev *udev) {
 	struct wlr_backend_state *state =
 		calloc(1, sizeof(struct wlr_backend_state));
 	if (!state) {
 		wlr_log(L_ERROR, "Backend allocation failed");
 		return NULL;
 	}
+
 	state->backends = list_create();
 	if (!state->backends) {
 		free(state);
 		wlr_log(L_ERROR, "Backend allocation failed");
 		return NULL;
 	}
+
 	struct wlr_backend *backend = wlr_backend_create(&backend_impl, state);
 	state->backend = backend;
+	state->session = session;
+	state->udev = udev;
 	return backend;
 }
 
+bool wlr_backend_is_multi(struct wlr_backend *b) {
+	return b->impl == &backend_impl;
+}
+
 static void input_add_reemit(struct wl_listener *listener, void *data) {
 	struct subbackend_state *state = wl_container_of(listener,
 			state, input_add);
@@ -104,3 +117,11 @@ void wlr_multi_backend_add(struct wlr_backend *multi,
 
 	list_add(multi->state->backends, sub);
 }
+
+struct wlr_session *wlr_multi_get_session(struct wlr_backend *base) {
+	if (base->impl != &backend_impl)
+		return NULL;
+
+	struct wlr_backend_state *multi = base->state;
+	return multi->session;
+}
diff --git a/session/direct-ipc.c b/backend/session/direct-ipc.c
index 885662e0..71e22148 100644
--- a/session/direct-ipc.c
+++ b/backend/session/direct-ipc.c
@@ -13,7 +13,7 @@
 #include <xf86drm.h>
 #include <linux/major.h>
 #include <wlr/util/log.h>
-#include "session/direct-ipc.h"
+#include "backend/session/direct-ipc.h"
 
 enum { DRM_MAJOR = 226 };
 
diff --git a/session/direct.c b/backend/session/direct.c
index 1247663b..82aa8e00 100644
--- a/session/direct.c
+++ b/backend/session/direct.c
@@ -13,9 +13,9 @@
 #include <linux/input.h>
 #include <linux/vt.h>
 #include <wayland-server.h>
-#include <wlr/session/interface.h>
+#include <wlr/backend/session/interface.h>
 #include <wlr/util/log.h>
-#include "session/direct-ipc.h"
+#include "backend/session/direct-ipc.h"
 
 enum { DRM_MAJOR = 226 };
 
diff --git a/session/logind.c b/backend/session/logind.c
index 6744215a..20d9b5ed 100644
--- a/session/logind.c
+++ b/backend/session/logind.c
@@ -11,7 +11,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <wayland-server.h>
-#include <wlr/session/interface.h>
+#include <wlr/backend/session/interface.h>
 #include <wlr/util/log.h>
 
 enum { DRM_MAJOR = 226 };
diff --git a/session/session.c b/backend/session/session.c
index 6f6aa2ea..a07d3cda 100644
--- a/session/session.c
+++ b/backend/session/session.c
@@ -1,7 +1,7 @@
 #include <stddef.h>
 #include <stdarg.h>
-#include <wlr/session.h>
-#include <wlr/session/interface.h>
+#include <wlr/backend/session.h>
+#include <wlr/backend/session/interface.h>
 #include <wlr/util/log.h>
 
 extern const struct session_impl session_logind;
@@ -30,6 +30,10 @@ struct wlr_session *wlr_session_start(struct wl_display *disp) {
 }
 
 void wlr_session_finish(struct wlr_session *session) {
+	if (!session) {
+		return;
+	}
+
 	session->impl->finish(session);
 };
 
@@ -42,5 +46,9 @@ void wlr_session_close_file(struct wlr_session *session, int fd) {
 }
 
 bool wlr_session_change_vt(struct wlr_session *session, unsigned vt) {
+	if (!session) {
+		return false;
+	}
+
 	return session->impl->change_vt(session, vt);
 }
diff --git a/backend/udev.c b/backend/udev.c
index 1fecaee4..1cc53f60 100644
--- a/backend/udev.c
+++ b/backend/udev.c
@@ -8,7 +8,7 @@
 #include <xf86drm.h>
 #include <xf86drmMode.h>
 #include <wayland-server.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/util/log.h>
 #include "backend/udev.h"
 
diff --git a/examples/compositor/main.c b/examples/compositor/main.c
index e13fda24..c618961d 100644
--- a/examples/compositor/main.c
+++ b/examples/compositor/main.c
@@ -6,7 +6,7 @@
 #include <inttypes.h>
 #include <wayland-server.h>
 #include <wlr/backend.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/render.h>
 #include <wlr/render/gles2.h>
 #include <wlr/types/wlr_output.h>
diff --git a/examples/pointer.c b/examples/pointer.c
index c7518841..d159caf5 100644
--- a/examples/pointer.c
+++ b/examples/pointer.c
@@ -14,7 +14,7 @@
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/backend.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_keyboard.h>
 #include <wlr/util/log.h>
 #include "shared.h"
diff --git a/examples/rotation.c b/examples/rotation.c
index 36e95f50..bcf855d9 100644
--- a/examples/rotation.c
+++ b/examples/rotation.c
@@ -14,7 +14,7 @@
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/backend.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_keyboard.h>
 #include <math.h>
 #include "shared.h"
diff --git a/examples/shared.c b/examples/shared.c
index 6d225a85..c66b8a23 100644
--- a/examples/shared.c
+++ b/examples/shared.c
@@ -8,7 +8,8 @@
 #include <xkbcommon/xkbcommon.h>
 #include <wayland-server-protocol.h>
 #include <wlr/backend.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
+#include <wlr/backend/multi.h> 
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_input_device.h>
 #include <wlr/util/log.h>
@@ -44,8 +45,16 @@ static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 		}
 		if (sym == XKB_KEY_Escape) {
 			wl_display_terminate(kbstate->compositor->display);
-		} else if (key_state == WLR_KEY_PRESSED && sym >= XKB_KEY_F1 && sym <= XKB_KEY_F12) {
-			wlr_session_change_vt(kbstate->compositor->session, sym - XKB_KEY_F1 + 1);
+		} else if (key_state == WLR_KEY_PRESSED &&
+				sym >= XKB_KEY_XF86Switch_VT_1 &&
+				sym <= XKB_KEY_XF86Switch_VT_12) {
+			if (wlr_backend_is_multi(kbstate->compositor->backend)) {
+				struct wlr_session *session =
+					wlr_multi_get_session(kbstate->compositor->backend);
+				if (session) {
+					wlr_session_change_vt(session, sym - XKB_KEY_XF86Switch_VT_1 + 1);
+				}
+			}
 		}
 	}
 	xkb_state_update_key(kbstate->xkb_state, keycode,
@@ -440,12 +449,6 @@ static void output_remove_notify(struct wl_listener *listener, void *data) {
 void compositor_init(struct compositor_state *state) {
 	state->display = wl_display_create();
 	state->event_loop = wl_display_get_event_loop(state->display);
-	state->session = wlr_session_start(state->display);
-	if (!state->session
-			|| !state->display
-			|| !state->event_loop) {
-		exit(1);
-	}
 
 	wl_list_init(&state->keyboards);
 	wl_list_init(&state->pointers);
@@ -463,10 +466,8 @@ void compositor_init(struct compositor_state *state) {
 	wl_list_init(&state->output_remove.link);
 	state->output_remove.notify = output_remove_notify;
 
-	struct wlr_backend *wlr = wlr_backend_autocreate(
-			state->display, state->session);
+	struct wlr_backend *wlr = wlr_backend_autocreate(state->display);
 	if (!wlr) {
-		wlr_session_finish(state->session);
 		exit(1);
 	}
 	wl_signal_add(&wlr->events.input_add, &state->input_add);
@@ -481,7 +482,6 @@ void compositor_init(struct compositor_state *state) {
 	if (!socket) {
 		wlr_log_errno(L_ERROR, "Unable to open wayland socket");
 		wlr_backend_destroy(wlr);
-		wlr_session_finish(state->session);
 		exit(1);
 	}
 
@@ -490,7 +490,6 @@ void compositor_init(struct compositor_state *state) {
 	if (!wlr_backend_init(state->backend)) {
 		wlr_log(L_ERROR, "Failed to initialize backend");
 		wlr_backend_destroy(wlr);
-		wlr_session_finish(state->session);
 		exit(1);
 	}
 }
@@ -498,6 +497,5 @@ void compositor_init(struct compositor_state *state) {
 void compositor_run(struct compositor_state *state) {
 	wl_display_run(state->display);
 	wlr_backend_destroy(state->backend);
-	wlr_session_finish(state->session);
 	wl_display_destroy(state->display);
 }
diff --git a/examples/shared.h b/examples/shared.h
index 1633f2c8..2379eef9 100644
--- a/examples/shared.h
+++ b/examples/shared.h
@@ -8,7 +8,7 @@
 #include <xkbcommon/xkbcommon.h>
 #include <wayland-server-protocol.h>
 #include <wlr/backend.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_input_device.h>
 
diff --git a/examples/simple.c b/examples/simple.c
index 45cb2b93..8e098e18 100644
--- a/examples/simple.c
+++ b/examples/simple.c
@@ -7,7 +7,7 @@
 #include <wayland-server.h>
 #include <GLES2/gl2.h>
 #include <wlr/backend.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_output.h>
 #include <xkbcommon/xkbcommon.h>
 #include "shared.h"
diff --git a/examples/tablet.c b/examples/tablet.c
index d7f7d042..0be6dcb9 100644
--- a/examples/tablet.c
+++ b/examples/tablet.c
@@ -13,7 +13,7 @@
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/backend.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_tablet_tool.h>
 #include <wlr/types/wlr_tablet_pad.h>
diff --git a/examples/touch.c b/examples/touch.c
index 97009e81..15ad9d49 100644
--- a/examples/touch.c
+++ b/examples/touch.c
@@ -15,7 +15,7 @@
 #include <wlr/render/gles2.h>
 #include <wlr/render.h>
 #include <wlr/backend.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/util/list.h>
 #include "shared.h"
 #include "cat.h"
diff --git a/include/backend/drm.h b/include/backend/drm.h
index dc12c258..ecdd945b 100644
--- a/include/backend/drm.h
+++ b/include/backend/drm.h
@@ -10,7 +10,7 @@
 #include <libudev.h>
 #include <gbm.h>
 
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/backend/drm.h>
 #include <wlr/util/list.h>
 
diff --git a/include/backend/multi.h b/include/backend/multi.h
index efaf61b9..5ac9cc1d 100644
--- a/include/backend/multi.h
+++ b/include/backend/multi.h
@@ -3,10 +3,14 @@
 
 #include <wlr/backend/interface.h>
 #include <wlr/backend/multi.h>
+#include <wlr/backend/udev.h>
 #include <wlr/util/list.h>
+#include <wlr/backend/session.h>
 
 struct wlr_backend_state {
 	struct wlr_backend *backend;
+	struct wlr_session *session;
+	struct wlr_udev *udev;
 	list_t *backends;
 };
 
diff --git a/include/session/direct-ipc.h b/include/backend/session/direct-ipc.h
index 96504f04..96504f04 100644
--- a/include/session/direct-ipc.h
+++ b/include/backend/session/direct-ipc.h
diff --git a/include/backend/udev.h b/include/backend/udev.h
index a2834063..080422c0 100644
--- a/include/backend/udev.h
+++ b/include/backend/udev.h
@@ -3,7 +3,7 @@
 
 #include <sys/types.h>
 #include <libudev.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wayland-server.h>
 #include <wlr/backend/udev.h>
 
diff --git a/include/wlr/backend.h b/include/wlr/backend.h
index db85c169..3910e406 100644
--- a/include/wlr/backend.h
+++ b/include/wlr/backend.h
@@ -2,7 +2,7 @@
 #define _WLR_BACKEND_H
 
 #include <wayland-server.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 
 struct wlr_backend_impl;
 struct wlr_backend_state;
@@ -19,8 +19,7 @@ struct wlr_backend {
 	} events;
 };
 
-struct wlr_backend *wlr_backend_autocreate(struct wl_display *display,
-		struct wlr_session *session);
+struct wlr_backend *wlr_backend_autocreate(struct wl_display *display);
 bool wlr_backend_init(struct wlr_backend *backend);
 void wlr_backend_destroy(struct wlr_backend *backend);
 
diff --git a/include/wlr/backend/drm.h b/include/wlr/backend/drm.h
index a486757d..7332d608 100644
--- a/include/wlr/backend/drm.h
+++ b/include/wlr/backend/drm.h
@@ -2,7 +2,7 @@
 #define WLR_BACKEND_DRM_H
 
 #include <wayland-server.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/backend.h>
 #include <wlr/backend/udev.h>
 
diff --git a/include/wlr/backend/libinput.h b/include/wlr/backend/libinput.h
index 29748b77..bba68888 100644
--- a/include/wlr/backend/libinput.h
+++ b/include/wlr/backend/libinput.h
@@ -3,7 +3,7 @@
 
 #include <libinput.h>
 #include <wayland-server.h>
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 #include <wlr/backend.h>
 #include <wlr/backend/udev.h>
 #include <wlr/types/wlr_input_device.h>
diff --git a/include/wlr/backend/multi.h b/include/wlr/backend/multi.h
index a07ca770..e8e46bed 100644
--- a/include/wlr/backend/multi.h
+++ b/include/wlr/backend/multi.h
@@ -2,9 +2,16 @@
 #define _WLR_BACKEND_MULTI_H
 
 #include <wlr/backend.h>
+#include <wlr/backend/udev.h>
+#include <wlr/backend/session.h>
 
-struct wlr_backend *wlr_multi_backend_create();
+struct wlr_backend *wlr_multi_backend_create(struct wlr_session *session,
+		struct wlr_udev *udev);
 void wlr_multi_backend_add(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);
+
 #endif
diff --git a/include/wlr/session.h b/include/wlr/backend/session.h
index 7961e620..7961e620 100644
--- a/include/wlr/session.h
+++ b/include/wlr/backend/session.h
diff --git a/include/wlr/session/interface.h b/include/wlr/backend/session/interface.h
index 4938110d..16814446 100644
--- a/include/wlr/session/interface.h
+++ b/include/wlr/backend/session/interface.h
@@ -1,7 +1,7 @@
 #ifndef WLR_SESSION_INTERFACE_H
 #define WLR_SESSION_INTERFACE_H
 
-#include <wlr/session.h>
+#include <wlr/backend/session.h>
 
 struct session_impl {
 	struct wlr_session *(*start)(struct wl_display *disp);
diff --git a/meson.build b/meson.build
index 9d603e22..ed687f56 100644
--- a/meson.build
+++ b/meson.build
@@ -63,7 +63,6 @@ wlr_files = []
 
 subdir('backend')
 subdir('render')
-subdir('session')
 subdir('types')
 subdir('util')
 
diff --git a/session/meson.build b/session/meson.build
deleted file mode 100644
index 4521cff6..00000000
--- a/session/meson.build
+++ /dev/null
@@ -1,9 +0,0 @@
-wlr_files += files(
-    'direct-ipc.c',
-    'direct.c',
-    'session.c',
-)
-
-if dep_systemd.found()
-    wlr_files += files('logind.c')
-endif