usb_device_linux.cc | Explore in Territory

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "services/device/usb/usb_device_linux.h"

#include <fcntl.h>
#include <stddef.h>

#include <algorithm>

#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/location.h"
#include "base/posix/eintr_wrapper.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "components/device_event_log/device_event_log.h"
#include "services/device/usb/usb_descriptors.h"
#include "services/device/usb/usb_device_handle_usbfs.h"
#include "services/device/usb/usb_service.h"

#if BUILDFLAG(IS_CHROMEOS)
#include "base/memory/memory_pressure_monitor.h"
#include "base/process/process_metrics.h"
#include "chromeos/dbus/permission_broker/permission_broker_client.h"  // nogncheck
#include "components/crash/core/common/crash_key.h"
#include "services/device/public/cpp/device_features.h"
namespace {
constexpr uint32_t kAllInterfacesMask = ~0U;
}  // namespace
#endif  // BUILDFLAG(IS_CHROMEOS)

namespace device {

UsbDeviceLinux::UsbDeviceLinux(const std::string& device_path,
                               std::unique_ptr<UsbDeviceDescriptor> descriptor)
    : … { … }

UsbDeviceLinux::~UsbDeviceLinux() = default;

#if BUILDFLAG(IS_CHROMEOS)

void UsbDeviceLinux::CheckUsbAccess(ResultCallback callback) {
  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
  chromeos::PermissionBrokerClient::Get()->CheckPathAccess(device_path_,
                                                           std::move(callback));
}

#endif  // BUILDFLAG(IS_CHROMEOS)

void UsbDeviceLinux::Open(OpenCallback callback) { … }

#if BUILDFLAG(IS_CHROMEOS)

void UsbDeviceLinux::OnOpenRequestComplete(OpenCallback callback,
                                           base::ScopedFD lifeline_fd,
                                           const std::string& client_id,
                                           base::ScopedFD fd) {
  if (!fd.is_valid()) {
    USB_LOG(EVENT) << "Did not get valid device handle from permission broker.";
    std::move(callback).Run(nullptr);
    return;
  }
  Opened(std::move(fd), std::move(lifeline_fd), client_id, std::move(callback),
         UsbService::CreateBlockingTaskRunner());
}

void UsbDeviceLinux::OnOpenRequestError(OpenCallback callback,
                                        const std::string& error_name,
                                        const std::string& error_message) {
  USB_LOG(EVENT) << "Permission broker failed to open the device: "
                 << error_name << ": " << error_message;
  std::move(callback).Run(nullptr);
}

#else

void UsbDeviceLinux::OpenOnBlockingThread(
    OpenCallback callback,
    scoped_refptr<base::SequencedTaskRunner> task_runner,
    scoped_refptr<base::SequencedTaskRunner> blocking_task_runner) { … }

#endif  // BUILDFLAG(IS_CHROMEOS)

void UsbDeviceLinux::Opened(
    base::ScopedFD fd,
    base::ScopedFD lifeline_fd,
    const std::string& client_id,
    OpenCallback callback,
    scoped_refptr<base::SequencedTaskRunner> blocking_task_runner) { … }

}  // namespace device
chromium/services/device/usb/usb_device_linux.cc
