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wayland: Set up initialization X11 socket

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This is used by GDK and the X11 bits, but may also be used for
other initialization services we might need to run along with
Xwayland initialization.

However, as the -initfd argument in Xwayland is a fairly new
feature, add some meson build-time checks so that the feature
is handled transparently while allowing to explicitly set/unset
it.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/945
This commit is contained in:
Carlos Garnacho 2019-07-19 22:50:31 +02:00 committed by Carlos Garnacho
parent 38e58b837b
commit 166a464515
6 changed files with 93 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
config.h.meson
View File

@ -67,3 +67,6 @@
/* Either <sys/random.h> or <linux/random.h> */
#mesondefine HAVE_SYS_RANDOM
#mesondefine HAVE_LINUX_RANDOM
/* Whether Xwayland has -initfd option */
#mesondefine HAVE_XWAYLAND_INITFD

15
meson.build
View File

@ -377,6 +377,7 @@ if cc.has_header_symbol('sys/prctl.h', 'prctl')
cdata.set('HAVE_SYS_PRCTL', 1)
endif
have_xwayland_initfd = false
if have_wayland
xwayland_path = get_option('xwayland_path')
if xwayland_path == ''
@ -392,6 +393,19 @@ if have_wayland
else
error('Required function getrandom not found')
endif
# For Xwayland -initfd usage
use_initfd = get_option('xwayland_initfd')
if use_initfd.auto()
xwayland_options = run_command(xwayland_path, '-help')
have_xwayland_initfd = xwayland_options.stderr().contains('-initfd')
else
have_xwayland_initfd = use_initfd.enabled()
endif
if (have_xwayland_initfd)
cdata.set('HAVE_XWAYLAND_INITFD', 1)
endif
endif
xwayland_grab_default_access_rules = get_option('xwayland_grab_default_access_rules')
@ -450,6 +464,7 @@ output = [
' Startup notification..... ' + have_startup_notification.to_string(),
' Introspection............ ' + have_introspection.to_string(),
' Profiler................. ' + have_profiler.to_string(),
' Xwayland initfd.......... ' + have_xwayland_initfd.to_string(),
'',
' Tests:',
'',

6
meson_options.txt
View File

@ -152,3 +152,9 @@ option('xwayland_grab_default_access_rules',
value: 'gnome-boxes,remote-viewer,virt-viewer,virt-manager,vinagre,vncviewer,Xephyr',
description: 'Comma delimited list of applications ressources or class allowed to issue X11 grabs in Xwayland'
)
option('xwayland_initfd',
type: 'feature',
value: 'auto',
description: 'Whether Xwayland -initfd argument is used'
)

9
src/wayland/meta-wayland-private.h
View File

@ -48,11 +48,18 @@ typedef struct
char *lock_file;
int abstract_fd;
int unix_fd;
char *name;
} MetaXWaylandConnection;
typedef struct
{
MetaXWaylandConnection private_connection;
MetaXWaylandConnection public_connection;
guint xserver_grace_period_id;
struct wl_display *wayland_display;
struct wl_client *client;
struct wl_resource *xserver_resource;
char *display_name;
char *auth_file;
GCancellable *xserver_died_cancellable;

4
src/wayland/meta-wayland.c
View File

@ -446,7 +446,7 @@ meta_wayland_init (void)
if (meta_get_x11_display_policy () != META_DISPLAY_POLICY_DISABLED)
{
set_gnome_env ("DISPLAY", meta_wayland_get_xwayland_display_name (compositor));
set_gnome_env ("DISPLAY", compositor->xwayland_manager.public_connection.name);
set_gnome_env ("XAUTHORITY", meta_wayland_get_xwayland_auth_file (compositor));
}
@ -462,7 +462,7 @@ meta_wayland_get_wayland_display_name (MetaWaylandCompositor *compositor)
const char *
meta_wayland_get_xwayland_display_name (MetaWaylandCompositor *compositor)
{
return compositor->xwayland_manager.display_name;
return compositor->xwayland_manager.private_connection.name;
}
void

81
src/wayland/meta-xwayland.c
View File

@ -314,6 +314,7 @@ xserver_died (GObject *source,
gpointer user_data)
{
GSubprocess *proc = G_SUBPROCESS (source);
MetaDisplay *display = meta_get_display ();
g_autoptr (GError) error = NULL;
if (!g_subprocess_wait_finish (proc, result, &error))
@ -338,7 +339,6 @@ xserver_died (GObject *source,
else if (meta_get_x11_display_policy () == META_DISPLAY_POLICY_ON_DEMAND)
{
MetaWaylandCompositor *compositor = meta_wayland_compositor_get_default ();
MetaDisplay *display = meta_get_display ();
if (display->x11_display)
meta_display_shutdown_x11 (display);
@ -381,6 +381,8 @@ meta_xwayland_override_display_number (int number)
static gboolean
open_display_sockets (MetaXWaylandManager *manager,
int display_index,
int *abstract_fd_out,
int *unix_fd_out,
gboolean *fatal)
{
int abstract_fd, unix_fd;
@ -398,14 +400,15 @@ open_display_sockets (MetaXWaylandManager *manager,
return FALSE;
}
manager->abstract_fd = abstract_fd;
manager->unix_fd = unix_fd;
*abstract_fd_out = abstract_fd;
*unix_fd_out = unix_fd;
return TRUE;
}
static gboolean
choose_xdisplay (MetaXWaylandManager *manager)
choose_xdisplay (MetaXWaylandManager *manager,
MetaXWaylandConnection *connection)
{
int display = 0;
char *lock_file = NULL;
@ -425,7 +428,10 @@ choose_xdisplay (MetaXWaylandManager *manager)
return FALSE;
}
if (!open_display_sockets (manager, display, &fatal))
if (!open_display_sockets (manager, display,
&connection->abstract_fd,
&connection->unix_fd,
&fatal))
{
unlink (lock_file);
@ -445,9 +451,9 @@ choose_xdisplay (MetaXWaylandManager *manager)
}
while (1);
manager->display_index = display;
manager->display_name = g_strdup_printf (":%d", manager->display_index);
manager->lock_file = lock_file;
connection->display_index = display;
connection->name = g_strdup_printf (":%d", connection->display_index);
connection->lock_file = lock_file;
return TRUE;
}
@ -611,14 +617,16 @@ meta_xwayland_start_xserver (MetaXWaylandManager *manager,
launcher = g_subprocess_launcher_new (flags);
g_subprocess_launcher_take_fd (launcher, xwayland_client_fd[1], 3);
g_subprocess_launcher_take_fd (launcher, manager->abstract_fd, 4);
g_subprocess_launcher_take_fd (launcher, manager->unix_fd, 5);
g_subprocess_launcher_take_fd (launcher, manager->public_connection.abstract_fd, 4);
g_subprocess_launcher_take_fd (launcher, manager->public_connection.unix_fd, 5);
g_subprocess_launcher_take_fd (launcher, displayfd[1], 6);
g_subprocess_launcher_take_fd (launcher, manager->private_connection.abstract_fd, 7);
g_subprocess_launcher_setenv (launcher, "WAYLAND_SOCKET", "3", TRUE);
manager->proc = g_subprocess_launcher_spawn (launcher, &error,
XWAYLAND_PATH, manager->display_name,
XWAYLAND_PATH,
manager->public_connection.name,
"-rootless",
"-noreset",
"-accessx",
@ -627,7 +635,13 @@ meta_xwayland_start_xserver (MetaXWaylandManager *manager,
"-listen", "4",
"-listen", "5",
"-displayfd", "6",
#ifdef HAVE_XWAYLAND_INITFD
"-initfd", "7",
#else
"-listen", "7",
#endif
NULL);
if (!manager->proc)
{
g_task_return_error (task, error);
@ -728,9 +742,11 @@ meta_xwayland_init (MetaXWaylandManager *manager,
MetaDisplayPolicy policy;
gboolean fatal;
if (!manager->display_name)
if (!manager->public_connection.name)
{
if (!choose_xdisplay (manager))
if (!choose_xdisplay (manager, &manager->public_connection))
return FALSE;
if (!choose_xdisplay (manager, &manager->private_connection))
return FALSE;
if (!prepare_auth_file (manager))
@ -738,7 +754,18 @@ meta_xwayland_init (MetaXWaylandManager *manager,
}
else
{
if (!open_display_sockets (manager, manager->display_index, &fatal))
if (!open_display_sockets (manager,
manager->public_connection.display_index,
&manager->public_connection.abstract_fd,
&manager->public_connection.unix_fd,
&fatal))
return FALSE;
if (!open_display_sockets (manager,
manager->private_connection.display_index,
&manager->private_connection.abstract_fd,
&manager->private_connection.unix_fd,
&fatal))
return FALSE;
}
@ -747,7 +774,7 @@ meta_xwayland_init (MetaXWaylandManager *manager,
if (policy == META_DISPLAY_POLICY_ON_DEMAND)
{
g_unix_fd_add (manager->abstract_fd, G_IO_IN,
g_unix_fd_add (manager->public_connection.abstract_fd, G_IO_IN,
xdisplay_connection_activity_cb, manager);
}
@ -793,6 +820,13 @@ meta_xwayland_complete_init (MetaDisplay *display,
}
}
static void
meta_xwayland_connection_release (MetaXWaylandConnection *connection)
{
unlink (connection->lock_file);
g_clear_pointer (&connection->lock_file, g_free);
}
void
meta_xwayland_shutdown (MetaXWaylandManager *manager)
{
@ -800,18 +834,21 @@ meta_xwayland_shutdown (MetaXWaylandManager *manager)
g_cancellable_cancel (manager->xserver_died_cancellable);
snprintf (path, sizeof path, "/tmp/.X11-unix/X%d", manager->display_index);
snprintf (path, sizeof path, "/tmp/.X11-unix/X%d", manager->public_connection.display_index);
unlink (path);
g_clear_pointer (&manager->display_name, g_free);
snprintf (path, sizeof path, "/tmp/.X11-unix/X%d", manager->private_connection.display_index);
unlink (path);
g_clear_pointer (&manager->public_connection.name, g_free);
g_clear_pointer (&manager->private_connection.name, g_free);
meta_xwayland_connection_release (&manager->public_connection);
meta_xwayland_connection_release (&manager->private_connection);
if (manager->auth_file)
{
unlink (manager->auth_file);
g_clear_pointer (&manager->auth_file, g_free);
}
if (manager->lock_file)
{
unlink (manager->lock_file);
g_clear_pointer (&manager->lock_file, g_free);
}
}