chromeos/dbus/update_engine_client.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chromeos/dbus/update_engine_client.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/bind.h"
  10 #include "base/callback.h"
  11 #include "base/command_line.h"
  12 #include "base/macros.h"
  13 #include "base/message_loop/message_loop.h"
  14 #include "base/strings/string_util.h"
  15 #include "chromeos/chromeos_switches.h"
  16 #include "dbus/bus.h"
  17 #include "dbus/message.h"
  18 #include "dbus/object_path.h"
  19 #include "dbus/object_proxy.h"
  20 #include "third_party/cros_system_api/dbus/service_constants.h"
  21
  22 namespace chromeos {
  23
  24 namespace {
  25
  26 const char kReleaseChannelDev[] = "dev-channel";
  27 const char kReleaseChannelBeta[] = "beta-channel";
  28 const char kReleaseChannelStable[] = "stable-channel";
  29
  30 // List of release channels ordered by stability.
  31 const char* kReleaseChannelsList[] = {kReleaseChannelDev,
  32                                       kReleaseChannelBeta,
  33                                       kReleaseChannelStable};
  34
  35 // Delay between successive state transitions during AU.
  36 const int kStateTransitionDefaultDelayMs = 3000;
  37
  38 // Delay between successive notifications about downloading progress
  39 // during fake AU.
  40 const int kStateTransitionDownloadingDelayMs = 250;
  41
  42 // Size of parts of a "new" image which are downloaded each
  43 // |kStateTransitionDownloadingDelayMs| during fake AU.
  44 const int64_t kDownloadSizeDelta = 1 << 19;
  45
  46 // Returns UPDATE_STATUS_ERROR on error.
  47 UpdateEngineClient::UpdateStatusOperation UpdateStatusFromString(
  48     const std::string& str) {
  49   VLOG(1) << "UpdateStatusFromString got " << str << " as input.";
  50   if (str == update_engine::kUpdateStatusIdle)
  51     return UpdateEngineClient::UPDATE_STATUS_IDLE;
  52   if (str == update_engine::kUpdateStatusCheckingForUpdate)
  53     return UpdateEngineClient::UPDATE_STATUS_CHECKING_FOR_UPDATE;
  54   if (str == update_engine::kUpdateStatusUpdateAvailable)
  55     return UpdateEngineClient::UPDATE_STATUS_UPDATE_AVAILABLE;
  56   if (str == update_engine::kUpdateStatusDownloading)
  57     return UpdateEngineClient::UPDATE_STATUS_DOWNLOADING;
  58   if (str == update_engine::kUpdateStatusVerifying)
  59     return UpdateEngineClient::UPDATE_STATUS_VERIFYING;
  60   if (str == update_engine::kUpdateStatusFinalizing)
  61     return UpdateEngineClient::UPDATE_STATUS_FINALIZING;
  62   if (str == update_engine::kUpdateStatusUpdatedNeedReboot)
  63     return UpdateEngineClient::UPDATE_STATUS_UPDATED_NEED_REBOOT;
  64   if (str == update_engine::kUpdateStatusReportingErrorEvent)
  65     return UpdateEngineClient::UPDATE_STATUS_REPORTING_ERROR_EVENT;
  66   if (str == update_engine::kUpdateStatusAttemptingRollback)
  67     return UpdateEngineClient::UPDATE_STATUS_ATTEMPTING_ROLLBACK;
  68   return UpdateEngineClient::UPDATE_STATUS_ERROR;
  69 }
  70
  71 // Used in UpdateEngineClient::EmptyUpdateCheckCallback().
  72 void EmptyUpdateCheckCallbackBody(
  73     UpdateEngineClient::UpdateCheckResult unused_result) {
  74 }
  75
  76 bool IsValidChannel(const std::string& channel) {
  77   return channel == kReleaseChannelDev || channel == kReleaseChannelBeta ||
  78          channel == kReleaseChannelStable;
  79 }
  80
  81 }  // namespace
  82
  83 // The UpdateEngineClient implementation used in production.
  84 class UpdateEngineClientImpl : public UpdateEngineClient {
  85  public:
  86   UpdateEngineClientImpl()
  87       : update_engine_proxy_(NULL), last_status_(), weak_ptr_factory_(this) {}
  88
  89   virtual ~UpdateEngineClientImpl() {
  90   }
  91
  92   // UpdateEngineClient implementation:
  93   virtual void AddObserver(Observer* observer) override {
  94     observers_.AddObserver(observer);
  95   }
  96
  97   virtual void RemoveObserver(Observer* observer) override {
  98     observers_.RemoveObserver(observer);
  99   }
 100
 101   virtual bool HasObserver(Observer* observer) override {
 102     return observers_.HasObserver(observer);
 103   }
 104
 105   virtual void RequestUpdateCheck(
 106       const UpdateCheckCallback& callback) override {
 107     dbus::MethodCall method_call(
 108         update_engine::kUpdateEngineInterface,
 109         update_engine::kAttemptUpdate);
 110     dbus::MessageWriter writer(&method_call);
 111     writer.AppendString("");  // Unused.
 112     writer.AppendString("");  // Unused.
 113
 114     VLOG(1) << "Requesting an update check";
 115     update_engine_proxy_->CallMethod(
 116         &method_call,
 117         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 118         base::Bind(&UpdateEngineClientImpl::OnRequestUpdateCheck,
 119                    weak_ptr_factory_.GetWeakPtr(),
 120                    callback));
 121   }
 122
 123   virtual void RebootAfterUpdate() override {
 124     dbus::MethodCall method_call(
 125         update_engine::kUpdateEngineInterface,
 126         update_engine::kRebootIfNeeded);
 127
 128     VLOG(1) << "Requesting a reboot";
 129     update_engine_proxy_->CallMethod(
 130         &method_call,
 131         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 132         base::Bind(&UpdateEngineClientImpl::OnRebootAfterUpdate,
 133                    weak_ptr_factory_.GetWeakPtr()));
 134   }
 135
 136   virtual void Rollback() override {
 137     VLOG(1) << "Requesting a rollback";
 138      dbus::MethodCall method_call(
 139         update_engine::kUpdateEngineInterface,
 140         update_engine::kAttemptRollback);
 141     dbus::MessageWriter writer(&method_call);
 142     writer.AppendBool(true /* powerwash */);
 143
 144     update_engine_proxy_->CallMethod(
 145         &method_call,
 146         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 147         base::Bind(&UpdateEngineClientImpl::OnRollback,
 148                    weak_ptr_factory_.GetWeakPtr()));
 149   }
 150
 151
 152   virtual void CanRollbackCheck(
 153       const RollbackCheckCallback& callback) override {
 154     dbus::MethodCall method_call(
 155         update_engine::kUpdateEngineInterface,
 156         update_engine::kCanRollback);
 157
 158     VLOG(1) << "Requesting to get rollback availability status";
 159     update_engine_proxy_->CallMethod(
 160         &method_call,
 161         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 162         base::Bind(&UpdateEngineClientImpl::OnCanRollbackCheck,
 163                    weak_ptr_factory_.GetWeakPtr(),
 164                    callback));
 165   }
 166
 167   virtual Status GetLastStatus() override {
 168     return last_status_;
 169   }
 170
 171   virtual void SetChannel(const std::string& target_channel,
 172                           bool is_powerwash_allowed) override {
 173     if (!IsValidChannel(target_channel)) {
 174       LOG(ERROR) << "Invalid channel name: " << target_channel;
 175       return;
 176     }
 177
 178     dbus::MethodCall method_call(
 179         update_engine::kUpdateEngineInterface,
 180         update_engine::kSetChannel);
 181     dbus::MessageWriter writer(&method_call);
 182     writer.AppendString(target_channel);
 183     writer.AppendBool(is_powerwash_allowed);
 184
 185     VLOG(1) << "Requesting to set channel: "
 186             << "target_channel=" << target_channel << ", "
 187             << "is_powerwash_allowed=" << is_powerwash_allowed;
 188     update_engine_proxy_->CallMethod(
 189         &method_call,
 190         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 191         base::Bind(&UpdateEngineClientImpl::OnSetChannel,
 192                    weak_ptr_factory_.GetWeakPtr()));
 193   }
 194
 195   virtual void GetChannel(bool get_current_channel,
 196                           const GetChannelCallback& callback) override {
 197     dbus::MethodCall method_call(
 198         update_engine::kUpdateEngineInterface,
 199         update_engine::kGetChannel);
 200     dbus::MessageWriter writer(&method_call);
 201     writer.AppendBool(get_current_channel);
 202
 203     VLOG(1) << "Requesting to get channel, get_current_channel="
 204             << get_current_channel;
 205     update_engine_proxy_->CallMethod(
 206         &method_call,
 207         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 208         base::Bind(&UpdateEngineClientImpl::OnGetChannel,
 209                    weak_ptr_factory_.GetWeakPtr(),
 210                    callback));
 211   }
 212
 213  protected:
 214   virtual void Init(dbus::Bus* bus) override {
 215     update_engine_proxy_ = bus->GetObjectProxy(
 216         update_engine::kUpdateEngineServiceName,
 217         dbus::ObjectPath(update_engine::kUpdateEngineServicePath));
 218
 219     // Monitor the D-Bus signal for brightness changes. Only the power
 220     // manager knows the actual brightness level. We don't cache the
 221     // brightness level in Chrome as it will make things less reliable.
 222     update_engine_proxy_->ConnectToSignal(
 223         update_engine::kUpdateEngineInterface,
 224         update_engine::kStatusUpdate,
 225         base::Bind(&UpdateEngineClientImpl::StatusUpdateReceived,
 226                    weak_ptr_factory_.GetWeakPtr()),
 227         base::Bind(&UpdateEngineClientImpl::StatusUpdateConnected,
 228                    weak_ptr_factory_.GetWeakPtr()));
 229
 230     // Get update engine status for the initial status. Update engine won't
 231     // send StatusUpdate signal unless there is a status change. If chrome
 232     // crashes after UPDATE_STATUS_UPDATED_NEED_REBOOT status is set,
 233     // restarted chrome would not get this status. See crbug.com/154104.
 234     GetUpdateEngineStatus();
 235   }
 236
 237  private:
 238   void GetUpdateEngineStatus() {
 239     dbus::MethodCall method_call(
 240         update_engine::kUpdateEngineInterface,
 241         update_engine::kGetStatus);
 242     update_engine_proxy_->CallMethodWithErrorCallback(
 243         &method_call,
 244         dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
 245         base::Bind(&UpdateEngineClientImpl::OnGetStatus,
 246                    weak_ptr_factory_.GetWeakPtr()),
 247         base::Bind(&UpdateEngineClientImpl::OnGetStatusError,
 248                    weak_ptr_factory_.GetWeakPtr()));
 249   }
 250
 251   // Called when a response for RequestUpdateCheck() is received.
 252   void OnRequestUpdateCheck(const UpdateCheckCallback& callback,
 253                             dbus::Response* response) {
 254     if (!response) {
 255       LOG(ERROR) << "Failed to request update check";
 256       callback.Run(UPDATE_RESULT_FAILED);
 257       return;
 258     }
 259     callback.Run(UPDATE_RESULT_SUCCESS);
 260   }
 261
 262   // Called when a response for RebootAfterUpdate() is received.
 263   void OnRebootAfterUpdate(dbus::Response* response) {
 264     if (!response) {
 265       LOG(ERROR) << "Failed to request rebooting after update";
 266       return;
 267     }
 268   }
 269
 270   // Called when a response for Rollback() is received.
 271   void OnRollback(dbus::Response* response) {
 272     if (!response) {
 273       LOG(ERROR) << "Failed to rollback";
 274       return;
 275     }
 276   }
 277
 278   // Called when a response for CanRollbackCheck() is received.
 279   void OnCanRollbackCheck(const RollbackCheckCallback& callback,
 280                           dbus::Response* response) {
 281     if (!response) {
 282       LOG(ERROR) << "Failed to request rollback availability status";
 283       callback.Run(false);
 284       return;
 285     }
 286     dbus::MessageReader reader(response);
 287     bool can_rollback;
 288     if (!reader.PopBool(&can_rollback)) {
 289       LOG(ERROR) << "Incorrect response: " << response->ToString();
 290       callback.Run(false);
 291       return;
 292     }
 293     VLOG(1) << "Rollback availability status received: " << can_rollback;
 294     callback.Run(can_rollback);
 295   }
 296
 297   // Called when a response for GetStatus is received.
 298   void OnGetStatus(dbus::Response* response) {
 299     if (!response) {
 300       LOG(ERROR) << "Failed to get response for GetStatus request.";
 301       return;
 302     }
 303
 304     dbus::MessageReader reader(response);
 305     std::string current_operation;
 306     Status status;
 307     if (!(reader.PopInt64(&status.last_checked_time) &&
 308           reader.PopDouble(&status.download_progress) &&
 309           reader.PopString(&current_operation) &&
 310           reader.PopString(&status.new_version) &&
 311           reader.PopInt64(&status.new_size))) {
 312       LOG(ERROR) << "GetStatus had incorrect response: "
 313                  << response->ToString();
 314       return;
 315     }
 316     status.status = UpdateStatusFromString(current_operation);
 317     last_status_ = status;
 318     FOR_EACH_OBSERVER(Observer, observers_, UpdateStatusChanged(status));
 319   }
 320
 321   // Called when GetStatus call failed.
 322   void OnGetStatusError(dbus::ErrorResponse* error) {
 323     LOG(ERROR) << "GetStatus request failed with error: "
 324                << (error ? error->ToString() : "");
 325   }
 326
 327   // Called when a response for SetReleaseChannel() is received.
 328   void OnSetChannel(dbus::Response* response) {
 329     if (!response) {
 330       LOG(ERROR) << "Failed to request setting channel";
 331       return;
 332     }
 333     VLOG(1) << "Succeeded to set channel";
 334   }
 335
 336   // Called when a response for GetChannel() is received.
 337   void OnGetChannel(const GetChannelCallback& callback,
 338                     dbus::Response* response) {
 339     if (!response) {
 340       LOG(ERROR) << "Failed to request getting channel";
 341       callback.Run("");
 342       return;
 343     }
 344     dbus::MessageReader reader(response);
 345     std::string channel;
 346     if (!reader.PopString(&channel)) {
 347       LOG(ERROR) << "Incorrect response: " << response->ToString();
 348       callback.Run("");
 349       return;
 350     }
 351     VLOG(1) << "The channel received: " << channel;
 352     callback.Run(channel);
 353   }
 354
 355   // Called when a status update signal is received.
 356   void StatusUpdateReceived(dbus::Signal* signal) {
 357     VLOG(1) << "Status update signal received: " << signal->ToString();
 358     dbus::MessageReader reader(signal);
 359     int64 last_checked_time = 0;
 360     double progress = 0.0;
 361     std::string current_operation;
 362     std::string new_version;
 363     int64_t new_size = 0;
 364     if (!(reader.PopInt64(&last_checked_time) &&
 365           reader.PopDouble(&progress) &&
 366           reader.PopString(&current_operation) &&
 367           reader.PopString(&new_version) &&
 368           reader.PopInt64(&new_size))) {
 369       LOG(ERROR) << "Status changed signal had incorrect parameters: "
 370                  << signal->ToString();
 371       return;
 372     }
 373     Status status;
 374     status.last_checked_time = last_checked_time;
 375     status.download_progress = progress;
 376     status.status = UpdateStatusFromString(current_operation);
 377     status.new_version = new_version;
 378     status.new_size = new_size;
 379
 380     last_status_ = status;
 381     FOR_EACH_OBSERVER(Observer, observers_, UpdateStatusChanged(status));
 382   }
 383
 384   // Called when the status update signal is initially connected.
 385   void StatusUpdateConnected(const std::string& interface_name,
 386                              const std::string& signal_name,
 387                              bool success) {
 388     LOG_IF(WARNING, !success)
 389         << "Failed to connect to status updated signal.";
 390   }
 391
 392   dbus::ObjectProxy* update_engine_proxy_;
 393   ObserverList<Observer> observers_;
 394   Status last_status_;
 395
 396   // Note: This should remain the last member so it'll be destroyed and
 397   // invalidate its weak pointers before any other members are destroyed.
 398   base::WeakPtrFactory<UpdateEngineClientImpl> weak_ptr_factory_;
 399
 400   DISALLOW_COPY_AND_ASSIGN(UpdateEngineClientImpl);
 401 };
 402
 403 // The UpdateEngineClient implementation used on Linux desktop,
 404 // which does nothing.
 405 class UpdateEngineClientStubImpl : public UpdateEngineClient {
 406  public:
 407   UpdateEngineClientStubImpl()
 408       : current_channel_(kReleaseChannelBeta),
 409         target_channel_(kReleaseChannelBeta) {}
 410
 411   // UpdateEngineClient implementation:
 412   virtual void Init(dbus::Bus* bus) override {}
 413   virtual void AddObserver(Observer* observer) override {}
 414   virtual void RemoveObserver(Observer* observer) override {}
 415   virtual bool HasObserver(Observer* observer) override { return false; }
 416
 417   virtual void RequestUpdateCheck(
 418       const UpdateCheckCallback& callback) override {
 419     callback.Run(UPDATE_RESULT_NOTIMPLEMENTED);
 420   }
 421   virtual void RebootAfterUpdate() override {}
 422   virtual void Rollback() override {}
 423   virtual void CanRollbackCheck(
 424       const RollbackCheckCallback& callback) override {
 425     callback.Run(true);
 426   }
 427   virtual Status GetLastStatus() override { return Status(); }
 428   virtual void SetChannel(const std::string& target_channel,
 429                           bool is_powerwash_allowed) override {
 430     VLOG(1) << "Requesting to set channel: "
 431             << "target_channel=" << target_channel << ", "
 432             << "is_powerwash_allowed=" << is_powerwash_allowed;
 433     target_channel_ = target_channel;
 434   }
 435   virtual void GetChannel(bool get_current_channel,
 436                           const GetChannelCallback& callback) override {
 437     VLOG(1) << "Requesting to get channel, get_current_channel="
 438             << get_current_channel;
 439     if (get_current_channel)
 440       callback.Run(current_channel_);
 441     else
 442       callback.Run(target_channel_);
 443   }
 444
 445   std::string current_channel_;
 446   std::string target_channel_;
 447 };
 448
 449 // The UpdateEngineClient implementation used on Linux desktop, which
 450 // tries to emulate real update engine client.
 451 class UpdateEngineClientFakeImpl : public UpdateEngineClientStubImpl {
 452  public:
 453   UpdateEngineClientFakeImpl() : weak_factory_(this) {
 454   }
 455
 456   virtual ~UpdateEngineClientFakeImpl() {
 457   }
 458
 459   // UpdateEngineClient implementation:
 460   virtual void AddObserver(Observer* observer) override {
 461     if (observer)
 462       observers_.AddObserver(observer);
 463   }
 464
 465   virtual void RemoveObserver(Observer* observer) override {
 466     if (observer)
 467       observers_.RemoveObserver(observer);
 468   }
 469
 470   virtual bool HasObserver(Observer* observer) override {
 471     return observers_.HasObserver(observer);
 472   }
 473
 474   virtual void RequestUpdateCheck(
 475       const UpdateCheckCallback& callback) override {
 476     if (last_status_.status != UPDATE_STATUS_IDLE) {
 477       callback.Run(UPDATE_RESULT_FAILED);
 478       return;
 479     }
 480     callback.Run(UPDATE_RESULT_SUCCESS);
 481     last_status_.status = UPDATE_STATUS_CHECKING_FOR_UPDATE;
 482     last_status_.download_progress = 0.0;
 483     last_status_.last_checked_time = 0;
 484     last_status_.new_size = 0;
 485     base::MessageLoop::current()->PostDelayedTask(
 486         FROM_HERE,
 487         base::Bind(&UpdateEngineClientFakeImpl::StateTransition,
 488                    weak_factory_.GetWeakPtr()),
 489         base::TimeDelta::FromMilliseconds(kStateTransitionDefaultDelayMs));
 490   }
 491
 492   virtual Status GetLastStatus() override { return last_status_; }
 493
 494  private:
 495   void StateTransition() {
 496     UpdateStatusOperation next_status = UPDATE_STATUS_ERROR;
 497     int delay_ms = kStateTransitionDefaultDelayMs;
 498     switch (last_status_.status) {
 499       case UPDATE_STATUS_ERROR:
 500       case UPDATE_STATUS_IDLE:
 501       case UPDATE_STATUS_UPDATED_NEED_REBOOT:
 502       case UPDATE_STATUS_REPORTING_ERROR_EVENT:
 503       case UPDATE_STATUS_ATTEMPTING_ROLLBACK:
 504         return;
 505       case UPDATE_STATUS_CHECKING_FOR_UPDATE:
 506         next_status = UPDATE_STATUS_UPDATE_AVAILABLE;
 507         break;
 508       case UPDATE_STATUS_UPDATE_AVAILABLE:
 509         next_status = UPDATE_STATUS_DOWNLOADING;
 510         break;
 511       case UPDATE_STATUS_DOWNLOADING:
 512         if (last_status_.download_progress >= 1.0) {
 513           next_status = UPDATE_STATUS_VERIFYING;
 514         } else {
 515           next_status = UPDATE_STATUS_DOWNLOADING;
 516           last_status_.download_progress += 0.01;
 517           last_status_.new_size = kDownloadSizeDelta;
 518           delay_ms = kStateTransitionDownloadingDelayMs;
 519         }
 520         break;
 521       case UPDATE_STATUS_VERIFYING:
 522         next_status = UPDATE_STATUS_FINALIZING;
 523         break;
 524       case UPDATE_STATUS_FINALIZING:
 525         next_status = UPDATE_STATUS_IDLE;
 526         break;
 527     }
 528     last_status_.status = next_status;
 529     FOR_EACH_OBSERVER(Observer, observers_, UpdateStatusChanged(last_status_));
 530     if (last_status_.status != UPDATE_STATUS_IDLE) {
 531       base::MessageLoop::current()->PostDelayedTask(
 532           FROM_HERE,
 533           base::Bind(&UpdateEngineClientFakeImpl::StateTransition,
 534                      weak_factory_.GetWeakPtr()),
 535           base::TimeDelta::FromMilliseconds(delay_ms));
 536     }
 537   }
 538
 539   ObserverList<Observer> observers_;
 540   Status last_status_;
 541
 542   base::WeakPtrFactory<UpdateEngineClientFakeImpl> weak_factory_;
 543
 544   DISALLOW_COPY_AND_ASSIGN(UpdateEngineClientFakeImpl);
 545 };
 546
 547 UpdateEngineClient::UpdateEngineClient() {
 548 }
 549
 550 UpdateEngineClient::~UpdateEngineClient() {
 551 }
 552
 553 // static
 554 UpdateEngineClient::UpdateCheckCallback
 555 UpdateEngineClient::EmptyUpdateCheckCallback() {
 556   return base::Bind(&EmptyUpdateCheckCallbackBody);
 557 }
 558
 559 // static
 560 UpdateEngineClient* UpdateEngineClient::Create(
 561     DBusClientImplementationType type) {
 562   if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
 563     return new UpdateEngineClientImpl();
 564   DCHECK_EQ(STUB_DBUS_CLIENT_IMPLEMENTATION, type);
 565   if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kTestAutoUpdateUI))
 566     return new UpdateEngineClientFakeImpl();
 567   else
 568     return new UpdateEngineClientStubImpl();
 569 }
 570
 571 // static
 572 bool UpdateEngineClient::IsTargetChannelMoreStable(
 573     const std::string& current_channel,
 574     const std::string& target_channel) {
 575   auto cix = std::find(kReleaseChannelsList,
 576                        kReleaseChannelsList + arraysize(kReleaseChannelsList),
 577                        current_channel);
 578   auto tix = std::find(kReleaseChannelsList,
 579                        kReleaseChannelsList + arraysize(kReleaseChannelsList),
 580                        target_channel);
 581   return tix > cix;
 582 }
 583
 584 }  // namespace chromeos