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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// chromeos::RemovableDeviceNotificationsCros implementation.
#include "chrome/browser/system_monitor/removable_device_notifications_chromeos.h"
#include "base/file_path.h"
#include "base/logging.h"
#include "base/stl_util.h"
#include "base/string_number_conversions.h"
#include "base/stringprintf.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/system_monitor/media_device_notifications_utils.h"
#include "chrome/browser/system_monitor/media_storage_util.h"
#include "chrome/browser/system_monitor/removable_device_constants.h"
#include "content/public/browser/browser_thread.h"
namespace chromeos {
using base::SystemMonitor;
namespace {
// Construct a device name using label or manufacturer (vendor and product) name
// details.
string16 GetDeviceName(const disks::DiskMountManager::Disk& disk) {
std::string device_name = disk.device_label();
if (device_name.empty()) {
device_name = disk.vendor_name();
const std::string& product_name = disk.product_name();
if (!product_name.empty()) {
if (!device_name.empty())
device_name += chrome::kSpaceDelim;
device_name += product_name;
}
}
return UTF8ToUTF16(device_name);
}
// Construct a device id using uuid or manufacturer (vendor and product) id
// details.
std::string MakeDeviceUniqueId(const disks::DiskMountManager::Disk& disk) {
std::string uuid = disk.fs_uuid();
if (!uuid.empty())
return chrome::kFSUniqueIdPrefix + uuid;
// If one of the vendor or product information is missing, its value in the
// string is empty.
// Format: VendorModelSerial:VendorInfo:ModelInfo:SerialInfo
// TODO(kmadhusu) Extract serial information for the disks and append it to
// the device unique id.
const std::string& vendor = disk.vendor_id();
const std::string& product = disk.product_id();
if (vendor.empty() && product.empty())
return std::string();
return base::StringPrintf("%s%s%s%s%s",
chrome::kVendorModelSerialPrefix,
vendor.c_str(), chrome::kNonSpaceDelim,
product.c_str(), chrome::kNonSpaceDelim);
}
static RemovableDeviceNotificationsCros*
g_removable_device_notifications_chromeos = NULL;
// Returns true if the requested device is valid, else false. On success, fills
// in |unique_id| and |device_label|
bool GetDeviceInfo(const std::string& source_path, std::string* unique_id,
string16* device_label) {
// Get the media device uuid and label if exists.
const disks::DiskMountManager::Disk* disk =
disks::DiskMountManager::GetInstance()->FindDiskBySourcePath(source_path);
if (!disk || disk->device_type() == DEVICE_TYPE_UNKNOWN)
return false;
if (unique_id)
*unique_id = MakeDeviceUniqueId(*disk);
if (device_label)
*device_label = GetDeviceName(*disk);
return true;
}
} // namespace
using chrome::MediaStorageUtil;
using content::BrowserThread;
RemovableDeviceNotificationsCros::RemovableDeviceNotificationsCros() {
DCHECK(disks::DiskMountManager::GetInstance());
DCHECK(!g_removable_device_notifications_chromeos);
g_removable_device_notifications_chromeos = this;
disks::DiskMountManager::GetInstance()->AddObserver(this);
CheckExistingMountPointsOnUIThread();
}
RemovableDeviceNotificationsCros::~RemovableDeviceNotificationsCros() {
DCHECK_EQ(this, g_removable_device_notifications_chromeos);
g_removable_device_notifications_chromeos = NULL;
disks::DiskMountManager* manager = disks::DiskMountManager::GetInstance();
if (manager) {
manager->RemoveObserver(this);
}
}
// static
RemovableDeviceNotificationsCros*
RemovableDeviceNotificationsCros::GetInstance() {
return g_removable_device_notifications_chromeos;
}
void RemovableDeviceNotificationsCros::CheckExistingMountPointsOnUIThread() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
const disks::DiskMountManager::MountPointMap& mount_point_map =
disks::DiskMountManager::GetInstance()->mount_points();
for (disks::DiskMountManager::MountPointMap::const_iterator it =
mount_point_map.begin(); it != mount_point_map.end(); ++it) {
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE,
base::Bind(
&RemovableDeviceNotificationsCros::CheckMountedPathOnFileThread,
this, it->second));
}
}
void RemovableDeviceNotificationsCros::DiskChanged(
disks::DiskMountManagerEventType event,
const disks::DiskMountManager::Disk* disk) {
}
void RemovableDeviceNotificationsCros::DeviceChanged(
disks::DiskMountManagerEventType event,
const std::string& device_path) {
}
void RemovableDeviceNotificationsCros::MountCompleted(
disks::DiskMountManager::MountEvent event_type,
MountError error_code,
const disks::DiskMountManager::MountPointInfo& mount_info) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
// Ignore mount points that are not devices.
if (mount_info.mount_type != MOUNT_TYPE_DEVICE)
return;
// Ignore errors.
if (error_code != MOUNT_ERROR_NONE)
return;
if (mount_info.mount_condition != disks::MOUNT_CONDITION_NONE)
return;
switch (event_type) {
case disks::DiskMountManager::MOUNTING: {
if (ContainsKey(mount_map_, mount_info.mount_path)) {
NOTREACHED();
return;
}
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE,
base::Bind(
&RemovableDeviceNotificationsCros::CheckMountedPathOnFileThread,
this, mount_info));
break;
}
case disks::DiskMountManager::UNMOUNTING: {
MountMap::iterator it = mount_map_.find(mount_info.mount_path);
if (it == mount_map_.end())
return;
SystemMonitor::Get()->ProcessRemovableStorageDetached(
it->second.device_id);
mount_map_.erase(it);
break;
}
}
}
bool RemovableDeviceNotificationsCros::GetDeviceInfoForPath(
const FilePath& path,
SystemMonitor::RemovableStorageInfo* device_info) const {
if (!path.IsAbsolute())
return false;
FilePath current = path;
while (!ContainsKey(mount_map_, current.value()) &&
current != current.DirName()) {
current = current.DirName();
}
MountMap::const_iterator info_it = mount_map_.find(current.value());
if (info_it == mount_map_.end())
return false;
if (device_info)
*device_info = info_it->second;
return true;
}
void RemovableDeviceNotificationsCros::CheckMountedPathOnFileThread(
const disks::DiskMountManager::MountPointInfo& mount_info) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
bool has_dcim = chrome::IsMediaDevice(mount_info.mount_path);
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&RemovableDeviceNotificationsCros::AddMountedPathOnUIThread,
this, mount_info, has_dcim));
}
void RemovableDeviceNotificationsCros::AddMountedPathOnUIThread(
const disks::DiskMountManager::MountPointInfo& mount_info, bool has_dcim) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
if (ContainsKey(mount_map_, mount_info.mount_path)) {
// CheckExistingMountPointsOnUIThread() added the mount point information
// in the map before the device attached handler is called. Therefore, an
// entry for the device already exists in the map.
return;
}
// Get the media device uuid and label if exists.
std::string unique_id;
string16 device_label;
if (!GetDeviceInfo(mount_info.source_path, &unique_id, &device_label))
return;
// Keep track of device uuid and label, to see how often we receive empty
// values.
MediaStorageUtil::RecordDeviceInfoHistogram(true, unique_id, device_label);
if (unique_id.empty() || device_label.empty())
return;
MediaStorageUtil::Type type = has_dcim ?
MediaStorageUtil::REMOVABLE_MASS_STORAGE_WITH_DCIM :
MediaStorageUtil::REMOVABLE_MASS_STORAGE_NO_DCIM;
std::string device_id = chrome::MediaStorageUtil::MakeDeviceId(type,
unique_id);
SystemMonitor::RemovableStorageInfo info(device_id, device_label,
mount_info.mount_path);
mount_map_.insert(std::make_pair(mount_info.mount_path, info));
SystemMonitor::Get()->ProcessRemovableStorageAttached(
device_id,
device_label,
mount_info.mount_path);
}
} // namespace chrome
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