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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/crostini/termina_installer.h"
#include <algorithm>
#include <memory>
#include <string_view>
#include "base/barrier_closure.h"
#include "base/containers/contains.h"
#include "base/files/file_path.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "chrome/browser/ash/crostini/crostini_util.h"
#include "chrome/browser/ash/guest_os/guest_os_dlc_helper.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/browser_process_platform_part_ash.h"
#include "components/component_updater/ash/component_manager_ash.h"
#include "content/public/browser/network_service_instance.h"
#include "services/network/public/cpp/network_connection_tracker.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace crostini {
TerminaInstaller::TerminaInstaller() = default;
TerminaInstaller::~TerminaInstaller() = default;
void TerminaInstaller::CancelInstall() {
// TODO(b/277835995): Tests demand concurrent installations despite that they
// need to be mass cancelled here (which is probably unintended). Consider
// switching to CachedCallback or similar.
for (auto& installation : installations_) {
installation->CancelGracefully();
}
}
void TerminaInstaller::Install(
base::OnceCallback<void(InstallResult)> callback) {
// The Remove*IfPresent methods require an unowned UninstallResult pointer to
// record their success/failure state. This has to be unowned so that in
// Uninstall it can be accessed further down the callback chain, but here we
// don't care about it, so we assign ownership of the pointer to a
// base::DoNothing that will delete it once called.
auto ptr = std::make_unique<UninstallResult>();
auto* uninstall_result_ptr = ptr.get();
auto remove_callback = base::BindOnce(
[](std::unique_ptr<UninstallResult> ptr) {}, std::move(ptr));
RemoveComponentIfPresent(std::move(remove_callback), uninstall_result_ptr);
installations_.push_back(std::make_unique<guest_os::GuestOsDlcInstallation>(
kCrostiniDlcName,
base::BindOnce(&TerminaInstaller::OnInstallDlc,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)),
base::DoNothing()));
}
void TerminaInstaller::OnInstallDlc(
base::OnceCallback<void(InstallResult)> callback,
guest_os::GuestOsDlcInstallation::Result result) {
if (result.has_value()) {
dlc_id_ = kCrostiniDlcName;
termina_location_ = result.value();
}
InstallResult response =
result
.transform_error([](guest_os::GuestOsDlcInstallation::Error err) {
switch (err) {
case guest_os::GuestOsDlcInstallation::Error::Cancelled:
return InstallResult::Cancelled;
case guest_os::GuestOsDlcInstallation::Error::Offline:
LOG(ERROR)
<< "Failed to install termina-dlc while offline, assuming "
"network issue.";
return InstallResult::Offline;
case guest_os::GuestOsDlcInstallation::Error::NeedUpdate:
case guest_os::GuestOsDlcInstallation::Error::NeedReboot:
LOG(ERROR) << "Failed to install termina-dlc because the OS "
"must be updated";
return InstallResult::NeedUpdate;
case guest_os::GuestOsDlcInstallation::Error::DiskFull:
case guest_os::GuestOsDlcInstallation::Error::Busy:
case guest_os::GuestOsDlcInstallation::Error::Internal:
case guest_os::GuestOsDlcInstallation::Error::Invalid:
case guest_os::GuestOsDlcInstallation::Error::UnknownFailure:
LOG(ERROR) << "Failed to install termina-dlc: " << err;
return InstallResult::Failure;
}
})
.error_or(InstallResult::Success);
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), response));
}
void TerminaInstaller::Uninstall(base::OnceCallback<void(bool)> callback) {
// Unset |termina_location_| now since it will become invalid at some point
// soon.
termina_location_ = std::nullopt;
// This is really a vector of bool, but std::vector<bool> has weird properties
// that stop us from using it in this way.
std::vector<UninstallResult> partial_results{0, 0};
UninstallResult* component_result = &partial_results[0];
UninstallResult* dlc_result = &partial_results[1];
// We want to get the results from both uninstall calls and combine them, and
// the asynchronous nature of this process means we can't use return values,
// so we need to pass a pointer into those calls to store their results and
// pass ownership of that memory into the result callback.
auto b_closure = BarrierClosure(
2, base::BindOnce(&TerminaInstaller::OnUninstallFinished,
weak_ptr_factory_.GetWeakPtr(), std::move(callback),
std::move(partial_results)));
RemoveComponentIfPresent(b_closure, component_result);
RemoveDlcIfPresent(b_closure, dlc_result);
}
void TerminaInstaller::RemoveComponentIfPresent(
base::OnceCallback<void()> callback,
UninstallResult* result) {
VLOG(1) << "Removing component";
scoped_refptr<component_updater::ComponentManagerAsh> component_manager =
g_browser_process->platform_part()->component_manager_ash();
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, {base::MayBlock()},
base::BindOnce(
[](scoped_refptr<component_updater::ComponentManagerAsh>
component_manager) {
return component_manager->IsRegisteredMayBlock(
imageloader::kTerminaComponentName);
},
std::move(component_manager)),
base::BindOnce(
[](base::OnceCallback<void()> callback, UninstallResult* result,
bool is_present) {
scoped_refptr<component_updater::ComponentManagerAsh>
component_manager =
g_browser_process->platform_part()->component_manager_ash();
if (is_present) {
VLOG(1) << "Component present, unloading";
*result =
component_manager->Unload(imageloader::kTerminaComponentName);
if (!*result) {
LOG(ERROR) << "Failed to remove cros-termina component";
}
} else {
VLOG(1) << "No component present, skipping";
*result = true;
}
std::move(callback).Run();
},
std::move(callback), result));
}
void TerminaInstaller::RemoveDlcIfPresent(base::OnceCallback<void()> callback,
UninstallResult* result) {
ash::DlcserviceClient::Get()->GetExistingDlcs(base::BindOnce(
[](base::WeakPtr<TerminaInstaller> weak_this,
base::OnceCallback<void()> callback, UninstallResult* result,
std::string_view err,
const dlcservice::DlcsWithContent& dlcs_with_content) {
if (!weak_this) {
return;
}
if (err != dlcservice::kErrorNone) {
LOG(ERROR) << "Failed to list installed DLCs: " << err;
*result = false;
std::move(callback).Run();
return;
}
for (const auto& dlc : dlcs_with_content.dlc_infos()) {
if (dlc.id() == kCrostiniDlcName) {
VLOG(1) << "DLC present, removing";
weak_this->RemoveDlc(std::move(callback), result);
return;
}
}
VLOG(1) << "No DLC present, skipping";
*result = true;
std::move(callback).Run();
},
weak_ptr_factory_.GetWeakPtr(), std::move(callback), result));
}
void TerminaInstaller::RemoveDlc(base::OnceCallback<void()> callback,
UninstallResult* result) {
ash::DlcserviceClient::Get()->Uninstall(
kCrostiniDlcName, base::BindOnce(
[](base::OnceCallback<void()> callback,
UninstallResult* result, std::string_view err) {
if (err == dlcservice::kErrorNone) {
VLOG(1) << "Removed DLC";
*result = true;
} else {
LOG(ERROR)
<< "Failed to remove termina-dlc: " << err;
*result = false;
}
std::move(callback).Run();
},
std::move(callback), result));
}
void TerminaInstaller::OnUninstallFinished(
base::OnceCallback<void(bool)> callback,
std::vector<UninstallResult> partial_results) {
std::move(callback).Run(!base::Contains(partial_results, 0));
}
base::FilePath TerminaInstaller::GetInstallLocation() {
CHECK(termina_location_)
<< "GetInstallLocation() called while termina not installed";
return *termina_location_;
}
std::optional<std::string> TerminaInstaller::GetDlcId() {
CHECK(termina_location_) << "GetDlcId() called while termina not installed";
return dlc_id_;
}
} // namespace crostini
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