qemu/ui/dbus.c
Marc-André Lureau 7f767ca35e ui/dbus: register D-Bus VC handler
Export the default consoles over the D-Bus chardev.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
2021-12-21 10:50:22 +04:00

483 lines
13 KiB
C

/*
* QEMU DBus display
*
* Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qemu/dbus.h"
#include "qemu/main-loop.h"
#include "qemu/option.h"
#include "qom/object_interfaces.h"
#include "sysemu/sysemu.h"
#include "ui/dbus-module.h"
#include "ui/egl-helpers.h"
#include "ui/egl-context.h"
#include "audio/audio.h"
#include "audio/audio_int.h"
#include "qapi/error.h"
#include "trace.h"
#include "dbus.h"
static DBusDisplay *dbus_display;
static QEMUGLContext dbus_create_context(DisplayGLCtx *dgc,
QEMUGLParams *params)
{
eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
qemu_egl_rn_ctx);
return qemu_egl_create_context(dgc, params);
}
static const DisplayGLCtxOps dbus_gl_ops = {
.compatible_dcl = &dbus_gl_dcl_ops,
.dpy_gl_ctx_create = dbus_create_context,
.dpy_gl_ctx_destroy = qemu_egl_destroy_context,
.dpy_gl_ctx_make_current = qemu_egl_make_context_current,
};
static NotifierList dbus_display_notifiers =
NOTIFIER_LIST_INITIALIZER(dbus_display_notifiers);
void
dbus_display_notifier_add(Notifier *notifier)
{
notifier_list_add(&dbus_display_notifiers, notifier);
}
static void
dbus_display_notifier_remove(Notifier *notifier)
{
notifier_remove(notifier);
}
void
dbus_display_notify(DBusDisplayEvent *event)
{
notifier_list_notify(&dbus_display_notifiers, event);
}
static void
dbus_display_init(Object *o)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
g_autoptr(GDBusObjectSkeleton) vm = NULL;
dd->glctx.ops = &dbus_gl_ops;
dd->iface = qemu_dbus_display1_vm_skeleton_new();
dd->consoles = g_ptr_array_new_with_free_func(g_object_unref);
dd->server = g_dbus_object_manager_server_new(DBUS_DISPLAY1_ROOT);
vm = g_dbus_object_skeleton_new(DBUS_DISPLAY1_ROOT "/VM");
g_dbus_object_skeleton_add_interface(
vm, G_DBUS_INTERFACE_SKELETON(dd->iface));
g_dbus_object_manager_server_export(dd->server, vm);
dbus_clipboard_init(dd);
dbus_chardev_init(dd);
}
static void
dbus_display_finalize(Object *o)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
if (dd->notifier.notify) {
dbus_display_notifier_remove(&dd->notifier);
}
qemu_clipboard_peer_unregister(&dd->clipboard_peer);
g_clear_object(&dd->clipboard);
g_clear_object(&dd->server);
g_clear_pointer(&dd->consoles, g_ptr_array_unref);
if (dd->add_client_cancellable) {
g_cancellable_cancel(dd->add_client_cancellable);
}
g_clear_object(&dd->add_client_cancellable);
g_clear_object(&dd->bus);
g_clear_object(&dd->iface);
g_free(dd->dbus_addr);
g_free(dd->audiodev);
dbus_display = NULL;
}
static bool
dbus_display_add_console(DBusDisplay *dd, int idx, Error **errp)
{
QemuConsole *con;
DBusDisplayConsole *dbus_console;
con = qemu_console_lookup_by_index(idx);
assert(con);
if (qemu_console_is_graphic(con) &&
dd->gl_mode != DISPLAYGL_MODE_OFF) {
qemu_console_set_display_gl_ctx(con, &dd->glctx);
}
dbus_console = dbus_display_console_new(dd, con);
g_ptr_array_insert(dd->consoles, idx, dbus_console);
g_dbus_object_manager_server_export(dd->server,
G_DBUS_OBJECT_SKELETON(dbus_console));
return true;
}
static void
dbus_display_complete(UserCreatable *uc, Error **errp)
{
DBusDisplay *dd = DBUS_DISPLAY(uc);
g_autoptr(GError) err = NULL;
g_autofree char *uuid = qemu_uuid_unparse_strdup(&qemu_uuid);
g_autoptr(GArray) consoles = NULL;
GVariant *console_ids;
int idx;
if (!object_resolve_path_type("", TYPE_DBUS_DISPLAY, NULL)) {
error_setg(errp, "There is already an instance of %s",
TYPE_DBUS_DISPLAY);
return;
}
if (dd->p2p) {
/* wait for dbus_display_add_client() */
dbus_display = dd;
} else if (dd->dbus_addr && *dd->dbus_addr) {
dd->bus = g_dbus_connection_new_for_address_sync(dd->dbus_addr,
G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT |
G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION,
NULL, NULL, &err);
} else {
dd->bus = g_bus_get_sync(G_BUS_TYPE_SESSION, NULL, &err);
}
if (err) {
error_setg(errp, "failed to connect to DBus: %s", err->message);
return;
}
if (dd->audiodev && *dd->audiodev) {
AudioState *audio_state = audio_state_by_name(dd->audiodev);
if (!audio_state) {
error_setg(errp, "Audiodev '%s' not found", dd->audiodev);
return;
}
if (!g_str_equal(audio_state->drv->name, "dbus")) {
error_setg(errp, "Audiodev '%s' is not compatible with DBus",
dd->audiodev);
return;
}
audio_state->drv->set_dbus_server(audio_state, dd->server);
}
consoles = g_array_new(FALSE, FALSE, sizeof(guint32));
for (idx = 0;; idx++) {
if (!qemu_console_lookup_by_index(idx)) {
break;
}
if (!dbus_display_add_console(dd, idx, errp)) {
return;
}
g_array_append_val(consoles, idx);
}
console_ids = g_variant_new_from_data(
G_VARIANT_TYPE("au"),
consoles->data, consoles->len * sizeof(guint32), TRUE,
(GDestroyNotify)g_array_unref, consoles);
g_steal_pointer(&consoles);
g_object_set(dd->iface,
"name", qemu_name ?: "QEMU " QEMU_VERSION,
"uuid", uuid,
"console-ids", console_ids,
NULL);
if (dd->bus) {
g_dbus_object_manager_server_set_connection(dd->server, dd->bus);
g_bus_own_name_on_connection(dd->bus, "org.qemu",
G_BUS_NAME_OWNER_FLAGS_NONE,
NULL, NULL, NULL, NULL);
}
}
static void
dbus_display_add_client_ready(GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
g_autoptr(GError) err = NULL;
g_autoptr(GDBusConnection) conn = NULL;
g_clear_object(&dbus_display->add_client_cancellable);
conn = g_dbus_connection_new_finish(res, &err);
if (!conn) {
error_printf("Failed to accept D-Bus client: %s", err->message);
}
g_dbus_object_manager_server_set_connection(dbus_display->server, conn);
}
static bool
dbus_display_add_client(int csock, Error **errp)
{
g_autoptr(GError) err = NULL;
g_autoptr(GSocket) socket = NULL;
g_autoptr(GSocketConnection) conn = NULL;
g_autofree char *guid = g_dbus_generate_guid();
if (!dbus_display) {
error_setg(errp, "p2p connections not accepted in bus mode");
return false;
}
if (dbus_display->add_client_cancellable) {
g_cancellable_cancel(dbus_display->add_client_cancellable);
}
socket = g_socket_new_from_fd(csock, &err);
if (!socket) {
error_setg(errp, "Failed to setup D-Bus socket: %s", err->message);
return false;
}
conn = g_socket_connection_factory_create_connection(socket);
dbus_display->add_client_cancellable = g_cancellable_new();
g_dbus_connection_new(G_IO_STREAM(conn),
guid,
G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER,
NULL,
dbus_display->add_client_cancellable,
dbus_display_add_client_ready,
NULL);
return true;
}
static bool
get_dbus_p2p(Object *o, Error **errp)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
return dd->p2p;
}
static void
set_dbus_p2p(Object *o, bool p2p, Error **errp)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
dd->p2p = p2p;
}
static char *
get_dbus_addr(Object *o, Error **errp)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
return g_strdup(dd->dbus_addr);
}
static void
set_dbus_addr(Object *o, const char *str, Error **errp)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
g_free(dd->dbus_addr);
dd->dbus_addr = g_strdup(str);
}
static char *
get_audiodev(Object *o, Error **errp)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
return g_strdup(dd->audiodev);
}
static void
set_audiodev(Object *o, const char *str, Error **errp)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
g_free(dd->audiodev);
dd->audiodev = g_strdup(str);
}
static int
get_gl_mode(Object *o, Error **errp)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
return dd->gl_mode;
}
static void
set_gl_mode(Object *o, int val, Error **errp)
{
DBusDisplay *dd = DBUS_DISPLAY(o);
dd->gl_mode = val;
}
static void
dbus_display_class_init(ObjectClass *oc, void *data)
{
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
ucc->complete = dbus_display_complete;
object_class_property_add_bool(oc, "p2p", get_dbus_p2p, set_dbus_p2p);
object_class_property_add_str(oc, "addr", get_dbus_addr, set_dbus_addr);
object_class_property_add_str(oc, "audiodev", get_audiodev, set_audiodev);
object_class_property_add_enum(oc, "gl-mode",
"DisplayGLMode", &DisplayGLMode_lookup,
get_gl_mode, set_gl_mode);
}
#define TYPE_CHARDEV_VC "chardev-vc"
typedef struct DBusVCClass {
DBusChardevClass parent_class;
void (*parent_parse)(QemuOpts *opts, ChardevBackend *b, Error **errp);
} DBusVCClass;
DECLARE_CLASS_CHECKERS(DBusVCClass, DBUS_VC,
TYPE_CHARDEV_VC)
static void
dbus_vc_parse(QemuOpts *opts, ChardevBackend *backend,
Error **errp)
{
DBusVCClass *klass = DBUS_VC_CLASS(object_class_by_name(TYPE_CHARDEV_VC));
const char *name = qemu_opt_get(opts, "name");
const char *id = qemu_opts_id(opts);
if (name == NULL) {
if (g_str_has_prefix(id, "compat_monitor")) {
name = "org.qemu.monitor.hmp.0";
} else if (g_str_has_prefix(id, "serial")) {
name = "org.qemu.console.serial.0";
} else {
name = "";
}
if (!qemu_opt_set(opts, "name", name, errp)) {
return;
}
}
klass->parent_parse(opts, backend, errp);
}
static void
dbus_vc_class_init(ObjectClass *oc, void *data)
{
DBusVCClass *klass = DBUS_VC_CLASS(oc);
ChardevClass *cc = CHARDEV_CLASS(oc);
klass->parent_parse = cc->parse;
cc->parse = dbus_vc_parse;
}
static const TypeInfo dbus_vc_type_info = {
.name = TYPE_CHARDEV_VC,
.parent = TYPE_CHARDEV_DBUS,
.class_init = dbus_vc_class_init,
};
static void
early_dbus_init(DisplayOptions *opts)
{
DisplayGLMode mode = opts->has_gl ? opts->gl : DISPLAYGL_MODE_OFF;
if (mode != DISPLAYGL_MODE_OFF) {
if (egl_rendernode_init(opts->u.dbus.rendernode, mode) < 0) {
error_report("dbus: render node init failed");
exit(1);
}
display_opengl = 1;
}
type_register(&dbus_vc_type_info);
}
static void
dbus_init(DisplayState *ds, DisplayOptions *opts)
{
DisplayGLMode mode = opts->has_gl ? opts->gl : DISPLAYGL_MODE_OFF;
if (opts->u.dbus.addr && opts->u.dbus.p2p) {
error_report("dbus: can't accept both addr=X and p2p=yes options");
exit(1);
}
using_dbus_display = 1;
object_new_with_props(TYPE_DBUS_DISPLAY,
object_get_objects_root(),
"dbus-display", &error_fatal,
"addr", opts->u.dbus.addr ?: "",
"audiodev", opts->u.dbus.audiodev ?: "",
"gl-mode", DisplayGLMode_str(mode),
"p2p", yes_no(opts->u.dbus.p2p),
NULL);
}
static const TypeInfo dbus_display_info = {
.name = TYPE_DBUS_DISPLAY,
.parent = TYPE_OBJECT,
.instance_size = sizeof(DBusDisplay),
.instance_init = dbus_display_init,
.instance_finalize = dbus_display_finalize,
.class_init = dbus_display_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static QemuDisplay qemu_display_dbus = {
.type = DISPLAY_TYPE_DBUS,
.early_init = early_dbus_init,
.init = dbus_init,
};
static void register_dbus(void)
{
qemu_dbus_display = (struct QemuDBusDisplayOps) {
.add_client = dbus_display_add_client,
};
type_register_static(&dbus_display_info);
qemu_display_register(&qemu_display_dbus);
}
type_init(register_dbus);
#ifdef CONFIG_OPENGL
module_dep("ui-opengl");
#endif