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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.
#include "chromeos/ash/components/disks/mount_point.h"
#include <string>
#include <utility>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/task/sequenced_task_runner.h"
namespace ash {
namespace disks {
namespace {
void OnMountDone(DiskMountManager* disk_mount_manager,
MountPoint::DoneCallback callback,
MountError error_code,
const DiskMountManager::MountPoint& mount_info) {
std::unique_ptr<MountPoint> mount_point;
if (error_code == MountError::kSuccess) {
DCHECK(!mount_info.mount_path.empty());
mount_point = std::make_unique<MountPoint>(
base::FilePath(mount_info.mount_path), disk_mount_manager);
}
// Post a task to guarantee the callback isn't called inline with the
// Mount() call.
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(std::move(callback), error_code, std::move(mount_point)));
}
} // namespace
// static
void MountPoint::Mount(DiskMountManager* disk_mount_manager,
const std::string& source_path,
const std::string& source_format,
const std::string& mount_label,
const std::vector<std::string>& mount_options,
MountType mount_type,
MountAccessMode access_mode,
DoneCallback callback) {
// |disk_mount_manager| owns the callback to OnMountDone, so we can bind it as
// unretained.
disk_mount_manager->MountPath(
source_path, source_format, mount_label, mount_options, mount_type,
access_mode,
base::BindOnce(&OnMountDone, base::Unretained(disk_mount_manager),
std::move(callback)));
}
MountPoint::MountPoint(const base::FilePath& mount_path,
DiskMountManager* disk_mount_manager)
: mount_path_(mount_path), disk_mount_manager_(disk_mount_manager) {
DCHECK(!mount_path_.empty());
}
MountPoint::~MountPoint() {
if (!mount_path_.empty()) {
disk_mount_manager_->UnmountPath(
mount_path_.value(), base::BindOnce([](MountError error_code) {
LOG_IF(WARNING, error_code != MountError::kSuccess)
<< "Failed to unmount with error code: " << error_code;
}));
}
}
void MountPoint::Unmount(MountPoint::UnmountCallback callback) {
DCHECK(callback);
DCHECK(!mount_path_.empty());
// Make a copy of the |mount_path_| on the stack and clear it, in case the
// callback runs inline and deletes |this|.
const std::string mount_path = mount_path_.value();
mount_path_.clear();
disk_mount_manager_->UnmountPath(
mount_path,
base::BindOnce(&MountPoint::OnUmountDone, weak_factory_.GetWeakPtr(),
std::move(callback)));
}
void MountPoint::OnUmountDone(MountPoint::UnmountCallback callback,
MountError unmount_error) {
std::move(callback).Run(unmount_error);
}
} // namespace disks
} // namespace ash
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