src/chromeos/disks/disk_mount_manager.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/disks/disk_mount_manager.h"
   6
   7 #include <map>
   8 #include <set>
   9
  10 #include "base/bind.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/observer_list.h"
  13 #include "base/stl_util.h"
  14 #include "base/strings/string_util.h"
  15 #include "chromeos/dbus/dbus_thread_manager.h"
  16
  17 namespace chromeos {
  18 namespace disks {
  19
  20 namespace {
  21
  22 const char kDeviceNotFound[] = "Device could not be found";
  23
  24 DiskMountManager* g_disk_mount_manager = NULL;
  25
  26 // The DiskMountManager implementation.
  27 class DiskMountManagerImpl : public DiskMountManager {
  28  public:
  29   DiskMountManagerImpl() :
  30     already_refreshed_(false),
  31     weak_ptr_factory_(this) {
  32     DBusThreadManager* dbus_thread_manager = DBusThreadManager::Get();
  33     DCHECK(dbus_thread_manager);
  34     cros_disks_client_ = dbus_thread_manager->GetCrosDisksClient();
  35     DCHECK(cros_disks_client_);
  36     cros_disks_client_->SetMountEventHandler(
  37         base::Bind(&DiskMountManagerImpl::OnMountEvent,
  38                    weak_ptr_factory_.GetWeakPtr()));
  39     cros_disks_client_->SetMountCompletedHandler(
  40         base::Bind(&DiskMountManagerImpl::OnMountCompleted,
  41                    weak_ptr_factory_.GetWeakPtr()));
  42     cros_disks_client_->SetFormatCompletedHandler(
  43         base::Bind(&DiskMountManagerImpl::OnFormatCompleted,
  44                    weak_ptr_factory_.GetWeakPtr()));
  45   }
  46
  47   virtual ~DiskMountManagerImpl() {
  48     STLDeleteContainerPairSecondPointers(disks_.begin(), disks_.end());
  49   }
  50
  51   // DiskMountManager override.
  52   virtual void AddObserver(Observer* observer) OVERRIDE {
  53     observers_.AddObserver(observer);
  54   }
  55
  56   // DiskMountManager override.
  57   virtual void RemoveObserver(Observer* observer) OVERRIDE {
  58     observers_.RemoveObserver(observer);
  59   }
  60
  61   // DiskMountManager override.
  62   virtual void MountPath(const std::string& source_path,
  63                          const std::string& source_format,
  64                          const std::string& mount_label,
  65                          MountType type) OVERRIDE {
  66     // Hidden and non-existent devices should not be mounted.
  67     if (type == MOUNT_TYPE_DEVICE) {
  68       DiskMap::const_iterator it = disks_.find(source_path);
  69       if (it == disks_.end() || it->second->is_hidden()) {
  70         OnMountCompleted(MountEntry(MOUNT_ERROR_INTERNAL, source_path, type,
  71                                     ""));
  72         return;
  73       }
  74     }
  75     cros_disks_client_->Mount(
  76         source_path,
  77         source_format,
  78         mount_label,
  79         // When succeeds, OnMountCompleted will be called by
  80         // "MountCompleted" signal instead.
  81         base::Bind(&base::DoNothing),
  82         base::Bind(&DiskMountManagerImpl::OnMountCompleted,
  83                    weak_ptr_factory_.GetWeakPtr(),
  84                    MountEntry(MOUNT_ERROR_INTERNAL, source_path, type, "")));
  85   }
  86
  87   // DiskMountManager override.
  88   virtual void UnmountPath(const std::string& mount_path,
  89                            UnmountOptions options,
  90                            const UnmountPathCallback& callback) OVERRIDE {
  91     UnmountChildMounts(mount_path);
  92     cros_disks_client_->Unmount(mount_path, options,
  93                                 base::Bind(&DiskMountManagerImpl::OnUnmountPath,
  94                                            weak_ptr_factory_.GetWeakPtr(),
  95                                            callback,
  96                                            true,
  97                                            mount_path),
  98                                 base::Bind(&DiskMountManagerImpl::OnUnmountPath,
  99                                            weak_ptr_factory_.GetWeakPtr(),
 100                                            callback,
 101                                            false,
 102                                            mount_path));
 103   }
 104
 105   // DiskMountManager override.
 106   virtual void FormatMountedDevice(const std::string& mount_path) OVERRIDE {
 107     MountPointMap::const_iterator mount_point = mount_points_.find(mount_path);
 108     if (mount_point == mount_points_.end()) {
 109       LOG(ERROR) << "Mount point with path \"" << mount_path << "\" not found.";
 110       OnFormatCompleted(FORMAT_ERROR_UNKNOWN, mount_path);
 111       return;
 112     }
 113
 114     std::string device_path = mount_point->second.source_path;
 115     DiskMap::const_iterator disk = disks_.find(device_path);
 116     if (disk == disks_.end()) {
 117       LOG(ERROR) << "Device with path \"" << device_path << "\" not found.";
 118       OnFormatCompleted(FORMAT_ERROR_UNKNOWN, device_path);
 119       return;
 120     }
 121
 122     UnmountPath(disk->second->mount_path(),
 123                 UNMOUNT_OPTIONS_NONE,
 124                 base::Bind(&DiskMountManagerImpl::OnUnmountPathForFormat,
 125                            weak_ptr_factory_.GetWeakPtr(),
 126                            device_path));
 127   }
 128
 129   // DiskMountManager override.
 130   virtual void UnmountDeviceRecursively(
 131       const std::string& device_path,
 132       const UnmountDeviceRecursivelyCallbackType& callback) OVERRIDE {
 133     std::vector<std::string> devices_to_unmount;
 134
 135     // Get list of all devices to unmount.
 136     int device_path_len = device_path.length();
 137     for (DiskMap::iterator it = disks_.begin(); it != disks_.end(); ++it) {
 138       if (!it->second->mount_path().empty() &&
 139           strncmp(device_path.c_str(), it->second->device_path().c_str(),
 140                   device_path_len) == 0) {
 141         devices_to_unmount.push_back(it->second->mount_path());
 142       }
 143     }
 144
 145     // We should detect at least original device.
 146     if (devices_to_unmount.empty()) {
 147       if (disks_.find(device_path) == disks_.end()) {
 148         LOG(WARNING) << "Unmount recursive request failed for device "
 149                      << device_path << ", with error: " << kDeviceNotFound;
 150         callback.Run(false);
 151         return;
 152       }
 153
 154       // Nothing to unmount.
 155       callback.Run(true);
 156       return;
 157     }
 158
 159     // We will send the same callback data object to all Unmount calls and use
 160     // it to synchronize callbacks.
 161     // Note: this implementation has a potential memory leak issue. For
 162     // example if this instance is destructed before all the callbacks for
 163     // Unmount are invoked, the memory pointed by |cb_data| will be leaked.
 164     // It is because the UnmountDeviceRecursivelyCallbackData keeps how
 165     // many times OnUnmountDeviceRecursively callback is called and when
 166     // all the callbacks are called, |cb_data| will be deleted in the method.
 167     // However destructing the instance before all callback invocations will
 168     // cancel all pending callbacks, so that the |cb_data| would never be
 169     // deleted.
 170     // Fortunately, in the real scenario, the instance will be destructed
 171     // only for ShutDown. So, probably the memory would rarely be leaked.
 172     // TODO(hidehiko): Fix the issue.
 173     UnmountDeviceRecursivelyCallbackData* cb_data =
 174         new UnmountDeviceRecursivelyCallbackData(
 175             callback, devices_to_unmount.size());
 176     for (size_t i = 0; i < devices_to_unmount.size(); ++i) {
 177       cros_disks_client_->Unmount(
 178           devices_to_unmount[i],
 179           UNMOUNT_OPTIONS_NONE,
 180           base::Bind(&DiskMountManagerImpl::OnUnmountDeviceRecursively,
 181                      weak_ptr_factory_.GetWeakPtr(),
 182                      cb_data,
 183                      true,
 184                      devices_to_unmount[i]),
 185           base::Bind(&DiskMountManagerImpl::OnUnmountDeviceRecursively,
 186                      weak_ptr_factory_.GetWeakPtr(),
 187                      cb_data,
 188                      false,
 189                      devices_to_unmount[i]));
 190     }
 191   }
 192
 193   // DiskMountManager override.
 194   virtual void EnsureMountInfoRefreshed(
 195       const EnsureMountInfoRefreshedCallback& callback) OVERRIDE {
 196     if (already_refreshed_) {
 197       callback.Run(true);
 198       return;
 199     }
 200
 201     refresh_callbacks_.push_back(callback);
 202     if (refresh_callbacks_.size() == 1) {
 203       // If there's no in-flight refreshing task, start it.
 204       cros_disks_client_->EnumerateAutoMountableDevices(
 205           base::Bind(&DiskMountManagerImpl::RefreshAfterEnumerateDevices,
 206                      weak_ptr_factory_.GetWeakPtr()),
 207           base::Bind(&DiskMountManagerImpl::RefreshCompleted,
 208                      weak_ptr_factory_.GetWeakPtr(), false));
 209     }
 210   }
 211
 212   // DiskMountManager override.
 213   virtual const DiskMap& disks() const OVERRIDE { return disks_; }
 214
 215   // DiskMountManager override.
 216   virtual const Disk* FindDiskBySourcePath(const std::string& source_path)
 217       const OVERRIDE {
 218     DiskMap::const_iterator disk_it = disks_.find(source_path);
 219     return disk_it == disks_.end() ? NULL : disk_it->second;
 220   }
 221
 222   // DiskMountManager override.
 223   virtual const MountPointMap& mount_points() const OVERRIDE {
 224     return mount_points_;
 225   }
 226
 227   // DiskMountManager override.
 228   virtual bool AddDiskForTest(Disk* disk) OVERRIDE {
 229     if (disks_.find(disk->device_path()) != disks_.end()) {
 230       LOG(ERROR) << "Attempt to add a duplicate disk";
 231       return false;
 232     }
 233
 234     disks_.insert(std::make_pair(disk->device_path(), disk));
 235     return true;
 236   }
 237
 238   // DiskMountManager override.
 239   // Corresponding disk should be added to the manager before this is called.
 240   virtual bool AddMountPointForTest(
 241       const MountPointInfo& mount_point) OVERRIDE {
 242     if (mount_points_.find(mount_point.mount_path) != mount_points_.end()) {
 243       LOG(ERROR) << "Attempt to add a duplicate mount point";
 244       return false;
 245     }
 246     if (mount_point.mount_type == chromeos::MOUNT_TYPE_DEVICE &&
 247         disks_.find(mount_point.source_path) == disks_.end()) {
 248       LOG(ERROR) << "Device mount points must have a disk entry.";
 249       return false;
 250     }
 251
 252     mount_points_.insert(std::make_pair(mount_point.mount_path, mount_point));
 253     return true;
 254   }
 255
 256  private:
 257   struct UnmountDeviceRecursivelyCallbackData {
 258     UnmountDeviceRecursivelyCallbackData(
 259         const UnmountDeviceRecursivelyCallbackType& in_callback,
 260         int in_num_pending_callbacks)
 261         : callback(in_callback),
 262           num_pending_callbacks(in_num_pending_callbacks) {
 263     }
 264
 265     const UnmountDeviceRecursivelyCallbackType callback;
 266     size_t num_pending_callbacks;
 267   };
 268
 269   // Unmounts all mount points whose source path is transitively parented by
 270   // |mount_path|.
 271   void UnmountChildMounts(const std::string& mount_path_in) {
 272     std::string mount_path = mount_path_in;
 273     // Let's make sure mount path has trailing slash.
 274     if (mount_path[mount_path.length() - 1] != '/')
 275       mount_path += '/';
 276
 277     for (MountPointMap::iterator it = mount_points_.begin();
 278          it != mount_points_.end();
 279          ++it) {
 280       if (StartsWithASCII(it->second.source_path, mount_path,
 281                           true /*case sensitive*/)) {
 282         // TODO(tbarzic): Handle the case where this fails.
 283         UnmountPath(it->second.mount_path,
 284                     UNMOUNT_OPTIONS_NONE,
 285                     UnmountPathCallback());
 286       }
 287     }
 288   }
 289
 290   // Callback for UnmountDeviceRecursively.
 291   void OnUnmountDeviceRecursively(
 292       UnmountDeviceRecursivelyCallbackData* cb_data,
 293       bool success,
 294       const std::string& mount_path) {
 295     if (success) {
 296       // Do standard processing for Unmount event.
 297       OnUnmountPath(UnmountPathCallback(), true, mount_path);
 298       VLOG(1) << mount_path <<  " unmounted.";
 299     }
 300     // This is safe as long as all callbacks are called on the same thread as
 301     // UnmountDeviceRecursively.
 302     cb_data->num_pending_callbacks--;
 303
 304     if (cb_data->num_pending_callbacks == 0) {
 305       // This code has a problem that the |success| status used here is for the
 306       // last "unmount" callback, but not whether all unmounting is succeeded.
 307       // TODO(hidehiko): Fix the issue.
 308       cb_data->callback.Run(success);
 309       delete cb_data;
 310     }
 311   }
 312
 313   // Callback to handle MountCompleted signal and Mount method call failure.
 314   void OnMountCompleted(const MountEntry& entry) {
 315     MountCondition mount_condition = MOUNT_CONDITION_NONE;
 316     if (entry.mount_type() == MOUNT_TYPE_DEVICE) {
 317       if (entry.error_code() == MOUNT_ERROR_UNKNOWN_FILESYSTEM) {
 318         mount_condition = MOUNT_CONDITION_UNKNOWN_FILESYSTEM;
 319       }
 320       if (entry.error_code() == MOUNT_ERROR_UNSUPPORTED_FILESYSTEM) {
 321         mount_condition = MOUNT_CONDITION_UNSUPPORTED_FILESYSTEM;
 322       }
 323     }
 324     const MountPointInfo mount_info(entry.source_path(),
 325                                     entry.mount_path(),
 326                                     entry.mount_type(),
 327                                     mount_condition);
 328
 329     NotifyMountStatusUpdate(MOUNTING, entry.error_code(), mount_info);
 330
 331     // If the device is corrupted but it's still possible to format it, it will
 332     // be fake mounted.
 333     if ((entry.error_code() == MOUNT_ERROR_NONE ||
 334          mount_info.mount_condition) &&
 335         mount_points_.find(mount_info.mount_path) == mount_points_.end()) {
 336       mount_points_.insert(MountPointMap::value_type(mount_info.mount_path,
 337                                                      mount_info));
 338     }
 339     if ((entry.error_code() == MOUNT_ERROR_NONE ||
 340          mount_info.mount_condition) &&
 341         mount_info.mount_type == MOUNT_TYPE_DEVICE &&
 342         !mount_info.source_path.empty() &&
 343         !mount_info.mount_path.empty()) {
 344       DiskMap::iterator iter = disks_.find(mount_info.source_path);
 345       if (iter == disks_.end()) {
 346         // disk might have been removed by now?
 347         return;
 348       }
 349       Disk* disk = iter->second;
 350       DCHECK(disk);
 351       disk->set_mount_path(mount_info.mount_path);
 352     }
 353   }
 354
 355   // Callback for UnmountPath.
 356   void OnUnmountPath(const UnmountPathCallback& callback,
 357                      bool success,
 358                      const std::string& mount_path) {
 359     MountPointMap::iterator mount_points_it = mount_points_.find(mount_path);
 360     if (mount_points_it == mount_points_.end()) {
 361       // The path was unmounted, but not as a result of this unmount request,
 362       // so return error.
 363       if (!callback.is_null())
 364         callback.Run(MOUNT_ERROR_INTERNAL);
 365       return;
 366     }
 367
 368     NotifyMountStatusUpdate(
 369         UNMOUNTING,
 370         success ? MOUNT_ERROR_NONE : MOUNT_ERROR_INTERNAL,
 371         MountPointInfo(mount_points_it->second.source_path,
 372                        mount_points_it->second.mount_path,
 373                        mount_points_it->second.mount_type,
 374                        mount_points_it->second.mount_condition));
 375
 376     std::string path(mount_points_it->second.source_path);
 377     if (success)
 378       mount_points_.erase(mount_points_it);
 379
 380     DiskMap::iterator disk_iter = disks_.find(path);
 381     if (disk_iter != disks_.end()) {
 382       DCHECK(disk_iter->second);
 383       if (success)
 384         disk_iter->second->clear_mount_path();
 385     }
 386
 387     if (!callback.is_null())
 388       callback.Run(success ? MOUNT_ERROR_NONE : MOUNT_ERROR_INTERNAL);
 389   }
 390
 391   void OnUnmountPathForFormat(const std::string& device_path,
 392                               MountError error_code) {
 393     if (error_code == MOUNT_ERROR_NONE &&
 394         disks_.find(device_path) != disks_.end()) {
 395       FormatUnmountedDevice(device_path);
 396     } else {
 397       OnFormatCompleted(FORMAT_ERROR_UNKNOWN, device_path);
 398     }
 399   }
 400
 401   // Starts device formatting.
 402   void FormatUnmountedDevice(const std::string& device_path) {
 403     DiskMap::const_iterator disk = disks_.find(device_path);
 404     DCHECK(disk != disks_.end() && disk->second->mount_path().empty());
 405
 406     const char kFormatVFAT[] = "vfat";
 407     cros_disks_client_->Format(
 408         device_path,
 409         kFormatVFAT,
 410         base::Bind(&DiskMountManagerImpl::OnFormatStarted,
 411                    weak_ptr_factory_.GetWeakPtr(),
 412                    device_path),
 413         base::Bind(&DiskMountManagerImpl::OnFormatCompleted,
 414                    weak_ptr_factory_.GetWeakPtr(),
 415                    FORMAT_ERROR_UNKNOWN,
 416                    device_path));
 417   }
 418
 419   // Callback for Format.
 420   void OnFormatStarted(const std::string& device_path) {
 421     NotifyFormatStatusUpdate(FORMAT_STARTED, FORMAT_ERROR_NONE, device_path);
 422   }
 423
 424   // Callback to handle FormatCompleted signal and Format method call failure.
 425   void OnFormatCompleted(FormatError error_code,
 426                          const std::string& device_path) {
 427     NotifyFormatStatusUpdate(FORMAT_COMPLETED, error_code, device_path);
 428   }
 429
 430   // Callback for GetDeviceProperties.
 431   void OnGetDeviceProperties(const DiskInfo& disk_info) {
 432     // TODO(zelidrag): Find a better way to filter these out before we
 433     // fetch the properties:
 434     // Ignore disks coming from the device we booted the system from.
 435     if (disk_info.on_boot_device())
 436       return;
 437
 438     LOG(WARNING) << "Found disk " << disk_info.device_path();
 439     // Delete previous disk info for this path:
 440     bool is_new = true;
 441     DiskMap::iterator iter = disks_.find(disk_info.device_path());
 442     if (iter != disks_.end()) {
 443       delete iter->second;
 444       disks_.erase(iter);
 445       is_new = false;
 446     }
 447     Disk* disk = new Disk(disk_info.device_path(),
 448                           disk_info.mount_path(),
 449                           disk_info.system_path(),
 450                           disk_info.file_path(),
 451                           disk_info.label(),
 452                           disk_info.drive_label(),
 453                           disk_info.vendor_id(),
 454                           disk_info.vendor_name(),
 455                           disk_info.product_id(),
 456                           disk_info.product_name(),
 457                           disk_info.uuid(),
 458                           FindSystemPathPrefix(disk_info.system_path()),
 459                           disk_info.device_type(),
 460                           disk_info.total_size_in_bytes(),
 461                           disk_info.is_drive(),
 462                           disk_info.is_read_only(),
 463                           disk_info.has_media(),
 464                           disk_info.on_boot_device(),
 465                           disk_info.on_removable_device(),
 466                           disk_info.is_hidden());
 467     disks_.insert(std::make_pair(disk_info.device_path(), disk));
 468     NotifyDiskStatusUpdate(is_new ? DISK_ADDED : DISK_CHANGED, disk);
 469   }
 470
 471   // Part of EnsureMountInfoRefreshed(). Called after the list of devices are
 472   // enumerated.
 473   void RefreshAfterEnumerateDevices(const std::vector<std::string>& devices) {
 474     std::set<std::string> current_device_set(devices.begin(), devices.end());
 475     for (DiskMap::iterator iter = disks_.begin(); iter != disks_.end(); ) {
 476       if (current_device_set.find(iter->first) == current_device_set.end()) {
 477         delete iter->second;
 478         disks_.erase(iter++);
 479       } else {
 480         ++iter;
 481       }
 482     }
 483     RefreshDeviceAtIndex(devices, 0);
 484   }
 485
 486   // Part of EnsureMountInfoRefreshed(). Called for each device to refresh info.
 487   void RefreshDeviceAtIndex(const std::vector<std::string>& devices,
 488                             size_t index) {
 489     if (index == devices.size()) {
 490       // All devices info retrieved. Proceed to enumerate mount point info.
 491       cros_disks_client_->EnumerateMountEntries(
 492           base::Bind(&DiskMountManagerImpl::RefreshAfterEnumerateMountEntries,
 493                      weak_ptr_factory_.GetWeakPtr()),
 494           base::Bind(&DiskMountManagerImpl::RefreshCompleted,
 495                      weak_ptr_factory_.GetWeakPtr(), false));
 496       return;
 497     }
 498
 499     cros_disks_client_->GetDeviceProperties(
 500         devices[index],
 501         base::Bind(&DiskMountManagerImpl::RefreshAfterGetDeviceProperties,
 502                    weak_ptr_factory_.GetWeakPtr(), devices, index + 1),
 503         base::Bind(&DiskMountManagerImpl::RefreshCompleted,
 504                    weak_ptr_factory_.GetWeakPtr(), false));
 505   }
 506
 507   // Part of EnsureMountInfoRefreshed().
 508   void RefreshAfterGetDeviceProperties(const std::vector<std::string>& devices,
 509                                        size_t next_index,
 510                                        const DiskInfo& disk_info) {
 511     OnGetDeviceProperties(disk_info);
 512     RefreshDeviceAtIndex(devices, next_index);
 513   }
 514
 515   // Part of EnsureMountInfoRefreshed(). Called after mount entries are listed.
 516   void RefreshAfterEnumerateMountEntries(
 517       const std::vector<MountEntry>& entries) {
 518     for (size_t i = 0; i < entries.size(); ++i)
 519       OnMountCompleted(entries[i]);
 520     RefreshCompleted(true);
 521   }
 522
 523   // Part of EnsureMountInfoRefreshed(). Called when the refreshing is done.
 524   void RefreshCompleted(bool success) {
 525     already_refreshed_ = true;
 526     for (size_t i = 0; i < refresh_callbacks_.size(); ++i)
 527       refresh_callbacks_[i].Run(success);
 528     refresh_callbacks_.clear();
 529   }
 530
 531   // Callback to handle mount event signals.
 532   void OnMountEvent(MountEventType event, const std::string& device_path_arg) {
 533     // Take a copy of the argument so we can modify it below.
 534     std::string device_path = device_path_arg;
 535     switch (event) {
 536       case CROS_DISKS_DISK_ADDED: {
 537         cros_disks_client_->GetDeviceProperties(
 538             device_path,
 539             base::Bind(&DiskMountManagerImpl::OnGetDeviceProperties,
 540                        weak_ptr_factory_.GetWeakPtr()),
 541             base::Bind(&base::DoNothing));
 542         break;
 543       }
 544       case CROS_DISKS_DISK_REMOVED: {
 545         // Search and remove disks that are no longer present.
 546         DiskMountManager::DiskMap::iterator iter = disks_.find(device_path);
 547         if (iter != disks_.end()) {
 548           Disk* disk = iter->second;
 549           NotifyDiskStatusUpdate(DISK_REMOVED, disk);
 550           delete iter->second;
 551           disks_.erase(iter);
 552         }
 553         break;
 554       }
 555       case CROS_DISKS_DEVICE_ADDED: {
 556         system_path_prefixes_.insert(device_path);
 557         NotifyDeviceStatusUpdate(DEVICE_ADDED, device_path);
 558         break;
 559       }
 560       case CROS_DISKS_DEVICE_REMOVED: {
 561         system_path_prefixes_.erase(device_path);
 562         NotifyDeviceStatusUpdate(DEVICE_REMOVED, device_path);
 563         break;
 564       }
 565       case CROS_DISKS_DEVICE_SCANNED: {
 566         NotifyDeviceStatusUpdate(DEVICE_SCANNED, device_path);
 567         break;
 568       }
 569       default: {
 570         LOG(ERROR) << "Unknown event: " << event;
 571       }
 572     }
 573   }
 574
 575   // Notifies all observers about disk status update.
 576   void NotifyDiskStatusUpdate(DiskEvent event,
 577                               const Disk* disk) {
 578     FOR_EACH_OBSERVER(Observer, observers_, OnDiskEvent(event, disk));
 579   }
 580
 581   // Notifies all observers about device status update.
 582   void NotifyDeviceStatusUpdate(DeviceEvent event,
 583                                 const std::string& device_path) {
 584     FOR_EACH_OBSERVER(Observer, observers_, OnDeviceEvent(event, device_path));
 585   }
 586
 587   // Notifies all observers about mount completion.
 588   void NotifyMountStatusUpdate(MountEvent event,
 589                                MountError error_code,
 590                                const MountPointInfo& mount_info) {
 591     FOR_EACH_OBSERVER(Observer, observers_,
 592                       OnMountEvent(event, error_code, mount_info));
 593   }
 594
 595   void NotifyFormatStatusUpdate(FormatEvent event,
 596                                 FormatError error_code,
 597                                 const std::string& device_path) {
 598     FOR_EACH_OBSERVER(Observer, observers_,
 599                       OnFormatEvent(event, error_code, device_path));
 600   }
 601
 602   // Finds system path prefix from |system_path|.
 603   const std::string& FindSystemPathPrefix(const std::string& system_path) {
 604     if (system_path.empty())
 605       return base::EmptyString();
 606     for (SystemPathPrefixSet::const_iterator it = system_path_prefixes_.begin();
 607          it != system_path_prefixes_.end();
 608          ++it) {
 609       const std::string& prefix = *it;
 610       if (StartsWithASCII(system_path, prefix, true))
 611         return prefix;
 612     }
 613     return base::EmptyString();
 614   }
 615
 616   // Mount event change observers.
 617   ObserverList<Observer> observers_;
 618
 619   CrosDisksClient* cros_disks_client_;
 620
 621   // The list of disks found.
 622   DiskMountManager::DiskMap disks_;
 623
 624   DiskMountManager::MountPointMap mount_points_;
 625
 626   typedef std::set<std::string> SystemPathPrefixSet;
 627   SystemPathPrefixSet system_path_prefixes_;
 628
 629   bool already_refreshed_;
 630   std::vector<EnsureMountInfoRefreshedCallback> refresh_callbacks_;
 631
 632   base::WeakPtrFactory<DiskMountManagerImpl> weak_ptr_factory_;
 633
 634   DISALLOW_COPY_AND_ASSIGN(DiskMountManagerImpl);
 635 };
 636
 637 }  // namespace
 638
 639 DiskMountManager::Disk::Disk(const std::string& device_path,
 640                              const std::string& mount_path,
 641                              const std::string& system_path,
 642                              const std::string& file_path,
 643                              const std::string& device_label,
 644                              const std::string& drive_label,
 645                              const std::string& vendor_id,
 646                              const std::string& vendor_name,
 647                              const std::string& product_id,
 648                              const std::string& product_name,
 649                              const std::string& fs_uuid,
 650                              const std::string& system_path_prefix,
 651                              DeviceType device_type,
 652                              uint64 total_size_in_bytes,
 653                              bool is_parent,
 654                              bool is_read_only,
 655                              bool has_media,
 656                              bool on_boot_device,
 657                              bool on_removable_device,
 658                              bool is_hidden)
 659     : device_path_(device_path),
 660       mount_path_(mount_path),
 661       system_path_(system_path),
 662       file_path_(file_path),
 663       device_label_(device_label),
 664       drive_label_(drive_label),
 665       vendor_id_(vendor_id),
 666       vendor_name_(vendor_name),
 667       product_id_(product_id),
 668       product_name_(product_name),
 669       fs_uuid_(fs_uuid),
 670       system_path_prefix_(system_path_prefix),
 671       device_type_(device_type),
 672       total_size_in_bytes_(total_size_in_bytes),
 673       is_parent_(is_parent),
 674       is_read_only_(is_read_only),
 675       has_media_(has_media),
 676       on_boot_device_(on_boot_device),
 677       on_removable_device_(on_removable_device),
 678       is_hidden_(is_hidden) {
 679 }
 680
 681 DiskMountManager::Disk::~Disk() {}
 682
 683 bool DiskMountManager::AddDiskForTest(Disk* disk) {
 684   return false;
 685 }
 686
 687 bool DiskMountManager::AddMountPointForTest(const MountPointInfo& mount_point) {
 688   return false;
 689 }
 690
 691 // static
 692 std::string DiskMountManager::MountConditionToString(MountCondition condition) {
 693   switch (condition) {
 694     case MOUNT_CONDITION_NONE:
 695       return "";
 696     case MOUNT_CONDITION_UNKNOWN_FILESYSTEM:
 697       return "unknown_filesystem";
 698     case MOUNT_CONDITION_UNSUPPORTED_FILESYSTEM:
 699       return "unsupported_filesystem";
 700     default:
 701       NOTREACHED();
 702   }
 703   return "";
 704 }
 705
 706 // static
 707 std::string DiskMountManager::DeviceTypeToString(DeviceType type) {
 708   switch (type) {
 709     case DEVICE_TYPE_USB:
 710       return "usb";
 711     case DEVICE_TYPE_SD:
 712       return "sd";
 713     case DEVICE_TYPE_OPTICAL_DISC:
 714       return "optical";
 715     case DEVICE_TYPE_MOBILE:
 716       return "mobile";
 717     default:
 718       return "unknown";
 719   }
 720 }
 721
 722 // static
 723 void DiskMountManager::Initialize() {
 724   if (g_disk_mount_manager) {
 725     LOG(WARNING) << "DiskMountManager was already initialized";
 726     return;
 727   }
 728   g_disk_mount_manager = new DiskMountManagerImpl();
 729   VLOG(1) << "DiskMountManager initialized";
 730 }
 731
 732 // static
 733 void DiskMountManager::InitializeForTesting(
 734     DiskMountManager* disk_mount_manager) {
 735   if (g_disk_mount_manager) {
 736     LOG(WARNING) << "DiskMountManager was already initialized";
 737     return;
 738   }
 739   g_disk_mount_manager = disk_mount_manager;
 740   VLOG(1) << "DiskMountManager initialized";
 741 }
 742
 743 // static
 744 void DiskMountManager::Shutdown() {
 745   if (!g_disk_mount_manager) {
 746     LOG(WARNING) << "DiskMountManager::Shutdown() called with NULL manager";
 747     return;
 748   }
 749   delete g_disk_mount_manager;
 750   g_disk_mount_manager = NULL;
 751   VLOG(1) << "DiskMountManager Shutdown completed";
 752 }
 753
 754 // static
 755 DiskMountManager* DiskMountManager::GetInstance() {
 756   return g_disk_mount_manager;
 757 }
 758
 759 }  // namespace disks
 760 }  // namespace chromeos