1 // 2 // Copyright (C) 2015 The Android Open Source Project 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 17 #include "update_engine/daemon.h" 18 19 #include <sysexits.h> 20 21 #include <base/bind.h> 22 #include <base/location.h> 23 #include <base/time/time.h> 24 #if USE_WEAVE || USE_BINDER 25 #include <binderwrapper/binder_wrapper.h> 26 #endif // USE_WEAVE || USE_BINDER 27 28 #if defined(__BRILLO__) || defined(__CHROMEOS__) 29 #include "update_engine/real_system_state.h" 30 #else // !(defined(__BRILLO__) || defined(__CHROMEOS__)) 31 #include "update_engine/daemon_state_android.h" 32 #endif // defined(__BRILLO__) || defined(__CHROMEOS__) 33 34 #if USE_DBUS 35 namespace { 36 const int kDBusSystemMaxWaitSeconds = 2 * 60; 37 } // namespace 38 #endif // USE_DBUS 39 40 namespace chromeos_update_engine { 41 42 int UpdateEngineDaemon::OnInit() { 43 // Register the |subprocess_| singleton with this Daemon as the signal 44 // handler. 45 subprocess_.Init(this); 46 47 int exit_code = Daemon::OnInit(); 48 if (exit_code != EX_OK) 49 return exit_code; 50 51 #if USE_WEAVE || USE_BINDER 52 android::BinderWrapper::Create(); 53 binder_watcher_.Init(); 54 #endif // USE_WEAVE || USE_BINDER 55 56 #if USE_DBUS 57 // We wait for the D-Bus connection for up two minutes to avoid re-spawning 58 // the daemon too fast causing thrashing if dbus-daemon is not running. 59 scoped_refptr<dbus::Bus> bus = dbus_connection_.ConnectWithTimeout( 60 base::TimeDelta::FromSeconds(kDBusSystemMaxWaitSeconds)); 61 62 if (!bus) { 63 // TODO(deymo): Make it possible to run update_engine even if dbus-daemon 64 // is not running or constantly crashing. 65 LOG(ERROR) << "Failed to initialize DBus, aborting."; 66 return 1; 67 } 68 69 CHECK(bus->SetUpAsyncOperations()); 70 #endif // USE_DBUS 71 72 #if defined(__BRILLO__) || defined(__CHROMEOS__) 73 // Initialize update engine global state but continue if something fails. 74 // TODO(deymo): Move the daemon_state_ initialization to a factory method 75 // avoiding the explicit re-usage of the |bus| instance, shared between 76 // D-Bus service and D-Bus client calls. 77 RealSystemState* real_system_state = new RealSystemState(bus); 78 daemon_state_.reset(real_system_state); 79 LOG_IF(ERROR, !real_system_state->Initialize()) 80 << "Failed to initialize system state."; 81 #else // !(defined(__BRILLO__) || defined(__CHROMEOS__)) 82 DaemonStateAndroid* daemon_state_android = new DaemonStateAndroid(); 83 daemon_state_.reset(daemon_state_android); 84 LOG_IF(ERROR, !daemon_state_android->Initialize()) 85 << "Failed to initialize system state."; 86 #endif // defined(__BRILLO__) || defined(__CHROMEOS__) 87 88 #if USE_BINDER 89 // Create the Binder Service. 90 #if defined(__BRILLO__) || defined(__CHROMEOS__) 91 binder_service_ = new BinderUpdateEngineBrilloService{real_system_state}; 92 #else // !(defined(__BRILLO__) || defined(__CHROMEOS__)) 93 binder_service_ = new BinderUpdateEngineAndroidService{ 94 daemon_state_android->service_delegate()}; 95 #endif // defined(__BRILLO__) || defined(__CHROMEOS__) 96 auto binder_wrapper = android::BinderWrapper::Get(); 97 if (!binder_wrapper->RegisterService(binder_service_->ServiceName(), 98 binder_service_)) { 99 LOG(ERROR) << "Failed to register binder service."; 100 } 101 102 daemon_state_->AddObserver(binder_service_.get()); 103 #endif // USE_BINDER 104 105 #if USE_DBUS 106 // Create the DBus service. 107 dbus_adaptor_.reset(new UpdateEngineAdaptor(real_system_state, bus)); 108 daemon_state_->AddObserver(dbus_adaptor_.get()); 109 110 dbus_adaptor_->RegisterAsync(base::Bind(&UpdateEngineDaemon::OnDBusRegistered, 111 base::Unretained(this))); 112 LOG(INFO) << "Waiting for DBus object to be registered."; 113 #else // !USE_DBUS 114 daemon_state_->StartUpdater(); 115 #endif // USE_DBUS 116 return EX_OK; 117 } 118 119 #if USE_DBUS 120 void UpdateEngineDaemon::OnDBusRegistered(bool succeeded) { 121 if (!succeeded) { 122 LOG(ERROR) << "Registering the UpdateEngineAdaptor"; 123 QuitWithExitCode(1); 124 return; 125 } 126 127 // Take ownership of the service now that everything is initialized. We need 128 // to this now and not before to avoid exposing a well known DBus service 129 // path that doesn't have the service it is supposed to implement. 130 if (!dbus_adaptor_->RequestOwnership()) { 131 LOG(ERROR) << "Unable to take ownership of the DBus service, is there " 132 << "other update_engine daemon running?"; 133 QuitWithExitCode(1); 134 return; 135 } 136 daemon_state_->StartUpdater(); 137 } 138 #endif // USE_DBUS 139 140 } // namespace chromeos_update_engine 141
