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Improve handling while VT switched

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When we don't have the DRM master, there is absolutely nothing
we can do (no event processing, no video output), so emulate
the old X DRM lock with a nested GMainContext without sources.

https://bugzilla.gnome.org/show_bug.cgi?id=705861
This commit is contained in:
Giovanni Campagna 2013-07-16 14:10:14 +02:00
parent 045d03014d
commit c96fd23e79
3 changed files with 64 additions and 32 deletions
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69
src/wayland/meta-tty.c
View File

@ -59,9 +59,12 @@ struct _MetaTTY
int fd;
struct termios terminal_attributes;
int input_source, vt_source;
GMainContext *nested_context;
GMainLoop *nested_loop;
int input_source;
GSource *vt_enter_source, *vt_leave_source;
int vt, starting_vt;
gboolean has_vt;
int kb_mode;
};
@ -79,27 +82,35 @@ G_DEFINE_TYPE_WITH_CODE (MetaTTY, meta_tty, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
meta_tty_initable_iface_init));
static int
vt_handler (gpointer user_data)
static gboolean
vt_acquire_handler (gpointer user_data)
{
MetaTTY *tty = user_data;
if (tty->has_vt)
{
tty->has_vt = FALSE;
g_signal_emit (tty, signals[SIGNAL_LEAVE], 0);
g_main_loop_quit (tty->nested_loop);
ioctl (tty->fd, VT_RELDISP, 1);
}
else
{
ioctl (tty->fd, VT_RELDISP, VT_ACKACQ);
return FALSE;
}
tty->has_vt = 1;
g_signal_emit (tty, signals[SIGNAL_ENTER], 0);
}
static gboolean
vt_release_handler (gpointer user_data)
{
MetaTTY *tty = user_data;
return 1;
g_signal_emit (tty, signals[SIGNAL_LEAVE], 0);
ioctl (tty->fd, VT_RELDISP, 1);
/* We can't do anything at this point, because we don't
have input devices and we don't have the DRM master,
so let's run a nested busy loop until the VT is reentered */
g_main_loop_run (tty->nested_loop);
ioctl (tty->fd, VT_RELDISP, VT_ACKACQ);
g_signal_emit (tty, signals[SIGNAL_ENTER], 0);
return FALSE;
}
static int
@ -164,7 +175,7 @@ env_get_fd (const char *env)
if (value == NULL)
return -1;
else
return g_ascii_strtoll (env, NULL, 10);
return g_ascii_strtoll (value, NULL, 10);
}
static gboolean
@ -271,10 +282,9 @@ meta_tty_initable_init(GInitable *initable,
goto err_kdkbmode;
}
tty->has_vt = 1;
mode.mode = VT_PROCESS;
mode.relsig = SIGUSR1;
mode.acqsig = SIGUSR1;
mode.acqsig = SIGUSR2;
if (ioctl(tty->fd, VT_SETMODE, &mode) < 0)
{
g_set_error (error, G_IO_ERROR,
@ -283,7 +293,16 @@ meta_tty_initable_init(GInitable *initable,
goto err_kdmode;
}
tty->vt_source = g_unix_signal_add (SIGUSR1, vt_handler, tty);
tty->vt_enter_source = g_unix_signal_source_new (SIGUSR2);
g_source_set_callback (tty->vt_enter_source, vt_acquire_handler, tty, NULL);
tty->vt_leave_source = g_unix_signal_source_new (SIGUSR1);
g_source_set_callback (tty->vt_leave_source, vt_release_handler, tty, NULL);
tty->nested_context = g_main_context_new ();
tty->nested_loop = g_main_loop_new (tty->nested_context, FALSE);
g_source_attach (tty->vt_leave_source, NULL);
g_source_attach (tty->vt_enter_source, tty->nested_context);
return TRUE;
@ -321,7 +340,7 @@ tty_reset (MetaTTY *tty)
if (ioctl (tty->fd, VT_SETMODE, &mode) < 0)
g_warning ("could not reset vt handling\n");
if (tty->has_vt && tty->vt != tty->starting_vt)
if (tty->vt != tty->starting_vt)
{
ioctl(tty->fd, VT_ACTIVATE, tty->starting_vt);
ioctl(tty->fd, VT_WAITACTIVE, tty->starting_vt);
@ -336,7 +355,11 @@ meta_tty_finalize (GObject *object)
if (tty->input_source)
g_source_remove (tty->input_source);
g_source_remove (tty->vt_source);
g_source_destroy (tty->vt_enter_source);
g_source_destroy (tty->vt_leave_source);
g_main_loop_unref (tty->nested_loop);
g_main_context_unref (tty->nested_context);
tty_reset (tty);

12
src/wayland/meta-wayland.c
View File

@ -1391,7 +1391,7 @@ env_get_fd (const char *env)
if (value == NULL)
return -1;
else
return g_ascii_strtoll (env, NULL, 10);
return g_ascii_strtoll (value, NULL, 10);
}
static void
@ -1506,6 +1506,8 @@ meta_wayland_init (void)
if (compositor->drm_fd >= 0)
{
GError *error;
/* Running on bare metal, let's initalize DRM master and VT handling */
compositor->tty = meta_tty_new ();
if (compositor->tty)
@ -1514,7 +1516,13 @@ meta_wayland_init (void)
g_signal_connect (compositor->tty, "leave", G_CALLBACK (on_our_vt_leave), compositor);
}
on_our_vt_enter (compositor->tty, compositor);
error = NULL;
if (!meta_weston_launch_set_master (compositor->weston_launch,
compositor->drm_fd, TRUE, &error))
{
g_error ("Failed to become DRM master: %s", error->message);
g_error_free (error);
}
}
compositor->stage = meta_wayland_stage_new ();

15
src/wayland/meta-weston-launch.c
View File

@ -79,14 +79,14 @@ send_message_to_wl (GSocket *weston_launch,
g_set_error (error, G_IO_ERROR, g_io_error_from_errno (-ok),
"Got failure from weston-launch: %s", strerror (-ok));
for (i = 0; in_all_cmsg[i]; i++)
for (i = 0; in_all_cmsg && in_all_cmsg[i]; i++)
g_object_unref (in_all_cmsg[i]);
g_free (in_all_cmsg);
return FALSE;
}
if (in_all_cmsg[0])
if (in_all_cmsg && in_all_cmsg[0])
{
for (i = 1; in_all_cmsg[i]; i++)
g_object_unref (in_all_cmsg[i]);
@ -156,17 +156,18 @@ meta_weston_launch_open_input_device (GSocket *weston_launch,
struct weston_launcher_open *message;
GSocketControlMessage *cmsg;
gboolean ok;
gsize size;
int *fds, n_fd;
int ret;
message = g_malloc (sizeof (struct weston_launcher_open) +
strlen (name));
size = sizeof (struct weston_launcher_open) + strlen (name) + 1;
message = g_malloc (size);
message->header.opcode = WESTON_LAUNCHER_OPEN;
message->flags = flags;
strcpy (message->path, name);
message->path[strlen(name)] = 0;
ok = send_message_to_wl (weston_launch, message,
sizeof (struct weston_launcher_open) + strlen (name),
ok = send_message_to_wl (weston_launch, message, size,
NULL, &cmsg, error);
if (ok)
@ -178,12 +179,12 @@ meta_weston_launch_open_input_device (GSocket *weston_launch,
ret = fds[0];
g_free (fds);
g_object_unref (cmsg);
}
else
ret = -1;
g_free (message);
g_object_unref (cmsg);
return ret;
}
else