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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_DRIVEFS_DRIVEFS_SESSION_H_
#define CHROMEOS_ASH_COMPONENTS_DRIVEFS_DRIVEFS_SESSION_H_
#include <memory>
#include <string>
#include <vector>
#include "base/component_export.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/timer/timer.h"
#include "base/unguessable_token.h"
#include "chromeos/ash/components/disks/disk_mount_manager.h"
#include "chromeos/ash/components/drivefs/mojom/drivefs.mojom.h"
namespace drivefs {
// Utility class to simplify mounting with DiskMountManager.
class COMPONENT_EXPORT(CHROMEOS_ASH_COMPONENTS_DRIVEFS) DiskMounter {
public:
DiskMounter() = default;
DiskMounter(const DiskMounter&) = delete;
DiskMounter& operator=(const DiskMounter&) = delete;
virtual ~DiskMounter() = default;
virtual void Mount(const base::UnguessableToken& token,
const base::FilePath& data_path,
const base::FilePath& my_files_path,
const std::string& desired_mount_dir_name,
base::OnceCallback<void(base::FilePath)> callback) = 0;
static std::unique_ptr<DiskMounter> Create(
ash::disks::DiskMountManager* disk_mount_manager);
};
class DriveFsConnection;
// Represents single Drive mount session. Hides the complexity
// of determining whether DriveFs is mounted or not.
class COMPONENT_EXPORT(CHROMEOS_ASH_COMPONENTS_DRIVEFS) DriveFsSession
: public mojom::DriveFsDelegate {
public:
class MountObserver {
public:
enum class MountFailure {
kUnknown,
kNeedsRestart,
kIpcDisconnect,
kInvocation,
kTimeout,
};
MountObserver() = default;
MountObserver(const MountObserver&) = delete;
MountObserver& operator=(const MountObserver&) = delete;
virtual ~MountObserver() = default;
virtual void OnMounted(const base::FilePath& mount_path) = 0;
virtual void OnUnmounted(std::optional<base::TimeDelta> remount_delay) = 0;
virtual void OnMountFailed(
MountFailure failure,
std::optional<base::TimeDelta> remount_delay) = 0;
};
DriveFsSession(base::OneShotTimer* timer,
std::unique_ptr<DiskMounter> disk_mounter,
std::unique_ptr<DriveFsConnection> connection,
const base::FilePath& data_path,
const base::FilePath& my_files_path,
const std::string& desired_mount_dir_name,
MountObserver* observer);
DriveFsSession(const DriveFsSession&) = delete;
DriveFsSession& operator=(const DriveFsSession&) = delete;
~DriveFsSession() override;
// Returns whether DriveFS is mounted.
bool is_mounted() const { return is_mounted_; }
// Returns the path where DriveFS is mounted.
const base::FilePath& mount_path() const { return mount_path_; }
mojom::DriveFs* drivefs_interface() { return drivefs_; }
private:
// mojom::DriveFsDelegate:
void OnMounted() final;
void OnMountFailed(std::optional<base::TimeDelta> remount_delay) final;
void OnUnmounted(std::optional<base::TimeDelta> remount_delay) final;
void OnHeartbeat() final;
void OnDiskMountCompleted(base::FilePath mount_path);
void OnMojoConnectionError();
void OnMountTimedOut();
void MaybeNotifyOnMounted();
void NotifyFailed(MountObserver::MountFailure failure,
std::optional<base::TimeDelta> remount_delay);
void NotifyUnmounted(std::optional<base::TimeDelta> remount_delay);
SEQUENCE_CHECKER(sequence_checker_);
const raw_ptr<base::OneShotTimer> timer_;
std::unique_ptr<DiskMounter> disk_mounter_;
std::unique_ptr<DriveFsConnection> connection_;
const raw_ptr<MountObserver> observer_;
// The path where DriveFS is mounted.
base::FilePath mount_path_;
// Mojo interface to the DriveFS process.
raw_ptr<mojom::DriveFs, DanglingUntriaged> drivefs_ = nullptr;
bool drivefs_has_started_ = false;
bool drivefs_has_terminated_ = false;
bool is_mounted_ = false;
};
} // namespace drivefs
#endif // CHROMEOS_ASH_COMPONENTS_DRIVEFS_DRIVEFS_SESSION_H_
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