| 1 | /* $Id: HostPowerLinux.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * VirtualBox interface to host's power notification service
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2015-2020 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 | #define LOG_GROUP LOG_GROUP_MAIN_HOST
|
|---|
| 19 | #include "HostPower.h"
|
|---|
| 20 | #include "LoggingNew.h"
|
|---|
| 21 |
|
|---|
| 22 | #include <iprt/asm.h>
|
|---|
| 23 | #include <iprt/power.h>
|
|---|
| 24 | #include <iprt/time.h>
|
|---|
| 25 |
|
|---|
| 26 | static bool checkDBusError(DBusError *pError, DBusConnection **pConnection)
|
|---|
| 27 | {
|
|---|
| 28 | if (dbus_error_is_set(pError))
|
|---|
| 29 | {
|
|---|
| 30 | LogRel(("HostPowerServiceLinux: DBus connection Error (%s)\n", pError->message));
|
|---|
| 31 | dbus_error_free(pError);
|
|---|
| 32 | if (*pConnection)
|
|---|
| 33 | {
|
|---|
| 34 | /* Close the socket or whatever underlying the connection. */
|
|---|
| 35 | dbus_connection_close(*pConnection);
|
|---|
| 36 | /* Free in-process resources used for the now-closed connection. */
|
|---|
| 37 | dbus_connection_unref(*pConnection);
|
|---|
| 38 | *pConnection = NULL;
|
|---|
| 39 | }
|
|---|
| 40 | return true;
|
|---|
| 41 | }
|
|---|
| 42 | return false;
|
|---|
| 43 | }
|
|---|
| 44 |
|
|---|
| 45 | HostPowerServiceLinux::HostPowerServiceLinux(VirtualBox *aVirtualBox)
|
|---|
| 46 | : HostPowerService(aVirtualBox)
|
|---|
| 47 | , mThread(NULL)
|
|---|
| 48 | , mpConnection(NULL)
|
|---|
| 49 | {
|
|---|
| 50 | DBusError error;
|
|---|
| 51 | int rc;
|
|---|
| 52 |
|
|---|
| 53 | rc = RTDBusLoadLib();
|
|---|
| 54 | if (RT_FAILURE(rc))
|
|---|
| 55 | {
|
|---|
| 56 | LogRel(("HostPowerServiceLinux: DBus library not found. Service not available.\n"));
|
|---|
| 57 | return;
|
|---|
| 58 | }
|
|---|
| 59 | dbus_error_init(&error);
|
|---|
| 60 | /* Connect to the DBus. The connection will be not shared with any other
|
|---|
| 61 | * in-process callers of dbus_bus_get(). This is considered wasteful (see
|
|---|
| 62 | * API documentation) but simplifies our code, specifically shutting down.
|
|---|
| 63 | * The session bus allows up to 100000 connections per user as it "is just
|
|---|
| 64 | * running as the user anyway" (see session.conf.in in the DBus sources). */
|
|---|
| 65 | mpConnection = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
|
|---|
| 66 | if (checkDBusError(&error, &mpConnection))
|
|---|
| 67 | return;
|
|---|
| 68 | /* We do not want to exit(1) if the connection is broken. */
|
|---|
| 69 | dbus_connection_set_exit_on_disconnect(mpConnection, FALSE);
|
|---|
| 70 | /* Tell the bus to wait for the sleep signal(s). */
|
|---|
| 71 | /* The current systemd-logind interface. */
|
|---|
| 72 | dbus_bus_add_match(mpConnection, "type='signal',interface='org.freedesktop.login1.Manager'", &error);
|
|---|
| 73 | /* The previous UPower interfaces (2010 - ca 2013). */
|
|---|
| 74 | dbus_bus_add_match(mpConnection, "type='signal',interface='org.freedesktop.UPower'", &error);
|
|---|
| 75 | dbus_connection_flush(mpConnection);
|
|---|
| 76 | if (checkDBusError(&error, &mpConnection))
|
|---|
| 77 | return;
|
|---|
| 78 | /* Create the new worker thread. */
|
|---|
| 79 | rc = RTThreadCreate(&mThread, HostPowerServiceLinux::powerChangeNotificationThread, this, 0 /* cbStack */,
|
|---|
| 80 | RTTHREADTYPE_MSG_PUMP, RTTHREADFLAGS_WAITABLE, "MainPower");
|
|---|
| 81 | if (RT_FAILURE(rc))
|
|---|
| 82 | LogRel(("HostPowerServiceLinux: RTThreadCreate failed with %Rrc\n", rc));
|
|---|
| 83 | }
|
|---|
| 84 |
|
|---|
| 85 |
|
|---|
| 86 | HostPowerServiceLinux::~HostPowerServiceLinux()
|
|---|
| 87 | {
|
|---|
| 88 | int rc;
|
|---|
| 89 | RTMSINTERVAL cMillies = 5000;
|
|---|
| 90 |
|
|---|
| 91 | /* Closing the connection should cause the event loop to exit. */
|
|---|
| 92 | LogFunc((": Stopping thread\n"));
|
|---|
| 93 | if (mpConnection)
|
|---|
| 94 | dbus_connection_close(mpConnection);
|
|---|
| 95 |
|
|---|
| 96 | rc = RTThreadWait(mThread, cMillies, NULL);
|
|---|
| 97 | if (rc != VINF_SUCCESS)
|
|---|
| 98 | LogRelThisFunc(("RTThreadWait() for %u ms failed with %Rrc\n", cMillies, rc));
|
|---|
| 99 | mThread = NIL_RTTHREAD;
|
|---|
| 100 | }
|
|---|
| 101 |
|
|---|
| 102 |
|
|---|
| 103 | DECLCALLBACK(int) HostPowerServiceLinux::powerChangeNotificationThread(RTTHREAD hThreadSelf, void *pInstance)
|
|---|
| 104 | {
|
|---|
| 105 | NOREF(hThreadSelf);
|
|---|
| 106 | HostPowerServiceLinux *pPowerObj = static_cast<HostPowerServiceLinux *>(pInstance);
|
|---|
| 107 | DBusConnection *pConnection = pPowerObj->mpConnection;
|
|---|
| 108 |
|
|---|
| 109 | Log(("HostPowerServiceLinux: Thread started\n"));
|
|---|
| 110 | while (dbus_connection_read_write(pConnection, -1))
|
|---|
| 111 | {
|
|---|
| 112 | DBusMessage *pMessage = NULL;
|
|---|
| 113 |
|
|---|
| 114 | for (;;)
|
|---|
| 115 | {
|
|---|
| 116 | DBusMessageIter args;
|
|---|
| 117 | dbus_bool_t fSuspend;
|
|---|
| 118 |
|
|---|
| 119 | pMessage = dbus_connection_pop_message(pConnection);
|
|---|
| 120 | if (pMessage == NULL)
|
|---|
| 121 | break;
|
|---|
| 122 | /* The systemd-logind interface notification. */
|
|---|
| 123 | if ( dbus_message_is_signal(pMessage, "org.freedesktop.login1.Manager", "PrepareForSleep")
|
|---|
| 124 | && dbus_message_iter_init(pMessage, &args)
|
|---|
| 125 | && dbus_message_iter_get_arg_type(&args) == DBUS_TYPE_BOOLEAN)
|
|---|
| 126 | {
|
|---|
| 127 | dbus_message_iter_get_basic(&args, &fSuspend);
|
|---|
| 128 | /* Trinary operator does not work here as Reason_... is an
|
|---|
| 129 | * anonymous enum. */
|
|---|
| 130 | if (fSuspend)
|
|---|
| 131 | pPowerObj->notify(Reason_HostSuspend);
|
|---|
| 132 | else
|
|---|
| 133 | pPowerObj->notify(Reason_HostResume);
|
|---|
| 134 | }
|
|---|
| 135 | /* The UPowerd interface notifications. Sleeping is the older one,
|
|---|
| 136 | * NotifySleep the newer. This gives us one second grace before the
|
|---|
| 137 | * suspend triggers. */
|
|---|
| 138 | if ( dbus_message_is_signal(pMessage, "org.freedesktop.UPower", "Sleeping")
|
|---|
| 139 | || dbus_message_is_signal(pMessage, "org.freedesktop.UPower", "NotifySleep"))
|
|---|
| 140 | pPowerObj->notify(Reason_HostSuspend);
|
|---|
| 141 | if ( dbus_message_is_signal(pMessage, "org.freedesktop.UPower", "Resuming")
|
|---|
| 142 | || dbus_message_is_signal(pMessage, "org.freedesktop.UPower", "NotifyResume"))
|
|---|
| 143 | pPowerObj->notify(Reason_HostResume);
|
|---|
| 144 | /* Free local resources held for the message. */
|
|---|
| 145 | dbus_message_unref(pMessage);
|
|---|
| 146 | }
|
|---|
| 147 | }
|
|---|
| 148 | /* Close the socket or whatever underlying the connection. */
|
|---|
| 149 | dbus_connection_close(pConnection);
|
|---|
| 150 | /* Free in-process resources used for the now-closed connection. */
|
|---|
| 151 | dbus_connection_unref(pConnection);
|
|---|
| 152 | Log(("HostPowerServiceLinux: Exiting thread\n"));
|
|---|
| 153 | return VINF_SUCCESS;
|
|---|
| 154 | }
|
|---|
| 155 |
|
|---|
