diff options
author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2021-10-10 00:16:57 +0400 |
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committer | Marc-André Lureau <marcandre.lureau@redhat.com> | 2021-12-21 10:50:22 +0400 |
commit | 99997823bbbd23aa0cce42e03b49fd8a57222e5e (patch) | |
tree | 42969eeb9548b76cd9cdced065c2abccf2b5d189 /ui/dbus.c | |
parent | 142ca628a733d0f523ad2b6713a22945e505f061 (diff) |
ui/dbus: add p2p=on/off option
Add an option to use direct connections instead of via the bus. Clients
are accepted with QMP add_client.
This allows to provide the D-Bus display without a bus. It also
simplifies the testing setup (some CI have issues to setup a D-Bus bus
in a container).
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'ui/dbus.c')
-rw-r--r-- | ui/dbus.c | 109 |
1 files changed, 104 insertions, 5 deletions
@@ -22,10 +22,12 @@ * THE SOFTWARE. */ #include "qemu/osdep.h" +#include "qemu/cutils.h" #include "qemu/dbus.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 "qapi/error.h" @@ -33,6 +35,8 @@ #include "dbus.h" +static DBusDisplay *dbus_display; + static QEMUGLContext dbus_create_context(DisplayGLCtx *dgc, QEMUGLParams *params) { @@ -73,9 +77,14 @@ dbus_display_finalize(Object *o) 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); + dbus_display = NULL; } static bool @@ -115,7 +124,10 @@ dbus_display_complete(UserCreatable *uc, Error **errp) return; } - if (dd->dbus_addr && *dd->dbus_addr) { + 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, @@ -151,10 +163,85 @@ dbus_display_complete(UserCreatable *uc, Error **errp) "console-ids", console_ids, NULL); - 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); + 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 * @@ -196,6 +283,7 @@ 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_enum(oc, "gl-mode", "DisplayGLMode", &DisplayGLMode_lookup, @@ -222,11 +310,19 @@ 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 ?: "", "gl-mode", DisplayGLMode_str(mode), + "p2p", yes_no(opts->u.dbus.p2p), NULL); } @@ -251,6 +347,9 @@ static QemuDisplay qemu_display_dbus = { 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); } |