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x11: gracefully handle ICE connection error

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Implementation is largely inspired by GNOME/mutter ICE session handling.

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/441>
This commit is contained in:
Igor V. Kovalenko 2020-12-23 10:31:18 +03:00 • committed by PulseAudio Marge Bot
parent b6396dbe9c
commit 6bfd9c809e
1 changed files with 69 additions and 13 deletions
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82
src/modules/x11/module-x11-xsmp.c
View file

@ -55,21 +55,50 @@ struct userdata {
pa_module *module;
pa_client *client;
SmcConn connection;
pa_x11_wrapper *x11;
pa_x11_wrapper *x11_wrapper;
pa_x11_client *x11_client;
};
static void x11_kill_cb(pa_x11_wrapper *w, void *userdata) {
struct userdata *u = userdata;
pa_assert(w);
pa_assert(u);
pa_assert(u->x11_wrapper == w);
pa_log_debug("X11 client kill callback called");
if (u->connection) {
SmcCloseConnection(u->connection, 0, NULL);
u->connection = NULL;
}
if (u->x11_client) {
pa_x11_client_free(u->x11_client);
u->x11_client = NULL;
}
if (u->x11_wrapper) {
pa_x11_wrapper_unref(u->x11_wrapper);
u->x11_wrapper = NULL;
}
pa_module_unload_request(u->module, true);
}
static void die_cb(SmcConn connection, SmPointer client_data) {
struct userdata *u = client_data;
pa_assert(u);
pa_log_debug("Got die message from XSMP.");
pa_x11_wrapper_kill_deferred(u->x11);
if (u->connection) {
SmcCloseConnection(u->connection, 0, NULL);
u->connection = NULL;
}
pa_x11_wrapper_unref(u->x11);
u->x11 = NULL;
pa_module_unload_request(u->module, true);
pa_x11_wrapper_kill_deferred(u->x11_wrapper);
}
static void save_complete_cb(SmcConn connection, SmPointer client_data) {
@ -87,6 +116,7 @@ static void ice_io_cb(pa_mainloop_api*a, pa_io_event *e, int fd, pa_io_event_fla
IceConn connection = userdata;
if (IceProcessMessages(connection, NULL, NULL) == IceProcessMessagesIOError) {
pa_log_debug("IceProcessMessages: I/O error, closing ICE connection");
IceSetShutdownNegotiation(connection, False);
IceCloseConnection(connection);
}
@ -106,6 +136,17 @@ static void new_ice_connection(IceConn connection, IcePointer client_data, Bool
c->mainloop->io_free(*watch_data);
}
static IceIOErrorHandler ice_installed_handler;
/* We call any handler installed before (or after) module is loaded but
avoid calling the default libICE handler which does an exit() */
static void ice_io_error_handler(IceConn iceConn) {
pa_log_warn("ICE I/O error handler called");
if (ice_installed_handler)
(*ice_installed_handler) (iceConn);
}
int pa__init(pa_module*m) {
pa_modargs *ma = NULL;
@ -123,17 +164,27 @@ int pa__init(pa_module*m) {
if (ice_in_use) {
pa_log("module-x11-xsmp may not be loaded twice.");
return -1;
}
} else {
IceIOErrorHandler default_handler;
IceAddConnectionWatch(new_ice_connection, m->core);
ice_in_use = true;
ice_installed_handler = IceSetIOErrorHandler (NULL);
default_handler = IceSetIOErrorHandler (ice_io_error_handler);
if (ice_installed_handler == default_handler)
ice_installed_handler = NULL;
IceSetIOErrorHandler(ice_io_error_handler);
IceAddConnectionWatch(new_ice_connection, m->core);
ice_in_use = true;
}
m->userdata = u = pa_xnew(struct userdata, 1);
u->core = m->core;
u->module = m;
u->client = NULL;
u->connection = NULL;
u->x11 = NULL;
u->x11_wrapper = NULL;
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments");
@ -147,9 +198,11 @@ int pa__init(pa_module*m) {
}
}
if (!(u->x11 = pa_x11_wrapper_get(m->core, pa_modargs_get_value(ma, "display", NULL))))
if (!(u->x11_wrapper = pa_x11_wrapper_get(m->core, pa_modargs_get_value(ma, "display", NULL))))
goto fail;
u->x11_client = pa_x11_client_new(u->x11_wrapper, NULL, x11_kill_cb, u);
e = pa_modargs_get_value(ma, "session_manager", NULL);
if (!e && !getenv("SESSION_MANAGER")) {
@ -253,8 +306,11 @@ void pa__done(pa_module*m) {
if (u->client)
pa_client_free(u->client);
if (u->x11)
pa_x11_wrapper_unref(u->x11);
if (u->x11_client)
pa_x11_client_free(u->x11_client);
if (u->x11_wrapper)
pa_x11_wrapper_unref(u->x11_wrapper);
pa_xfree(u);
}