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// Copyright 2022 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/crostini_shared_devices.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "chrome/browser/ash/crostini/crostini_util.h"
#include "chrome/browser/ash/guest_os/guest_os_pref_names.h"
#include "chrome/browser/ash/guest_os/guest_os_session_tracker_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "chromeos/ash/components/dbus/cicerone/cicerone_client.h"
namespace crostini {
CrostiniSharedDevices::CrostiniSharedDevices(Profile* profile)
: profile_(profile) {
// There is a risk that after a Chrome crash and restart, we won't recognize
// an already running container for which we have not yet applied user prefs.
// In this case, there is little risk as CrostiniRecoveryView should have been
// shown to tell the user they need to restart their container.
guest_os::GuestOsSessionTrackerFactory::GetForProfile(profile_)
->AddContainerStartedObserver(this);
}
CrostiniSharedDevices::~CrostiniSharedDevices() = default;
bool CrostiniSharedDevices::IsVmDeviceShared(guest_os::GuestId container_id,
const std::string& vm_device) {
const base::Value* shared_devices = GetContainerPrefValue(
profile_, container_id, guest_os::prefs::kContainerSharedVmDevicesKey);
if (!shared_devices || !shared_devices->is_dict()) {
VLOG(2) << "No shared_devices dict for " << container_id;
return false;
}
auto opt_shared = shared_devices->GetDict().FindBool(vm_device);
return opt_shared.has_value() && opt_shared.value();
}
void CrostiniSharedDevices::SetVmDeviceShared(guest_os::GuestId container_id,
const std::string& vm_device,
bool shared,
ResultCallback callback) {
const base::Value* prev_shared_devices = guest_os::GetContainerPrefValue(
profile_, container_id, guest_os::prefs::kContainerSharedVmDevicesKey);
base::Value::Dict shared_devices;
if (prev_shared_devices && prev_shared_devices->is_dict()) {
shared_devices = prev_shared_devices->GetDict().Clone();
}
shared_devices.Set(vm_device, shared);
if (guest_os::GuestOsSessionTrackerFactory::GetForProfile(profile_)
->IsRunning(container_id)) {
ApplySharingState(std::move(container_id), std::move(shared_devices),
std::move(callback));
} else {
VLOG(2) << "Not applying yet, container not running " << container_id;
guest_os::MergeContainerPref(profile_, container_id,
guest_os::prefs::kContainerSharedVmDevicesKey,
std::move(shared_devices));
std::move(callback).Run(false);
}
}
void CrostiniSharedDevices::ApplySharingState(
const guest_os::GuestId container_id,
base::Value::Dict next_shared_devices,
ResultCallback callback) {
if (next_shared_devices.empty()) {
VLOG(2) << "Nothing to apply";
return;
}
vm_tools::cicerone::UpdateContainerDevicesRequest request;
request.set_owner_id(CryptohomeIdForProfile(profile_));
request.set_vm_name(container_id.vm_name);
request.set_container_name(container_id.container_name);
auto* updates = request.mutable_updates();
for (auto it : next_shared_devices) {
auto opt_shared = it.second.GetIfBool();
vm_tools::cicerone::VmDeviceAction action =
opt_shared.has_value() && opt_shared.value()
? vm_tools::cicerone::VmDeviceAction::ENABLE
: vm_tools::cicerone::VmDeviceAction::DISABLE;
(*updates)[it.first] = action;
}
ash::CiceroneClient::Get()->UpdateContainerDevices(
request,
base::BindOnce(&CrostiniSharedDevices::OnUpdateContainerDevices,
weak_ptr_factory_.GetWeakPtr(), std::move(container_id),
std::move(next_shared_devices), std::move(callback)));
}
void CrostiniSharedDevices::OnUpdateContainerDevices(
const guest_os::GuestId container_id,
base::Value::Dict next_shared_devices,
ResultCallback callback,
std::optional<vm_tools::cicerone::UpdateContainerDevicesResponse>
response) {
bool success = true;
if (!response.has_value()) {
LOG(ERROR) << "No UpdateContainerDevicesResponse received.";
success = false;
} else if (response->status() !=
vm_tools::cicerone::UpdateContainerDevicesResponse::OK) {
LOG(ERROR)
<< "UpdateContainerDevices failed, error "
<< vm_tools::cicerone::UpdateContainerDevicesResponse_Status_Name(
response->status());
success = false;
}
if (success) {
for (const auto& it : response->results()) {
const base::Value* prev_shared_devices = guest_os::GetContainerPrefValue(
profile_, container_id,
guest_os::prefs::kContainerSharedVmDevicesKey);
const auto& vm_device = it.first;
auto result = it.second;
switch (result) {
case vm_tools::cicerone::UpdateContainerDevicesResponse::ACTION_FAILED:
LOG(WARNING) << "trying to restore old pref value for " << it.first;
if (prev_shared_devices && prev_shared_devices->is_dict()) {
// Preserve/restore the old pref value.
auto opt_shared =
prev_shared_devices->GetDict().FindBool(vm_device);
if (opt_shared.has_value()) {
next_shared_devices.Set(vm_device, opt_shared.value());
}
} else {
next_shared_devices.Remove(vm_device);
}
break;
case vm_tools::cicerone::UpdateContainerDevicesResponse::
NO_SUCH_VM_DEVICE:
LOG(WARNING) << "VM has no such device " << it.first;
next_shared_devices.Set(vm_device, false);
break;
case vm_tools::cicerone::UpdateContainerDevicesResponse::SUCCESS:
default:
VLOG(2) << "applied pref for " << it.first;
break;
}
}
guest_os::MergeContainerPref(profile_, container_id,
guest_os::prefs::kContainerSharedVmDevicesKey,
std::move(next_shared_devices));
}
std::move(callback).Run(success);
}
void CrostiniSharedDevices::OnContainerStarted(
const guest_os::GuestId& container_id) {
const base::Value* prev_shared_devices = guest_os::GetContainerPrefValue(
profile_, container_id, guest_os::prefs::kContainerSharedVmDevicesKey);
base::Value::Dict shared_devices;
if (prev_shared_devices && prev_shared_devices->is_dict()) {
shared_devices = prev_shared_devices->GetDict().Clone();
}
VLOG(2) << "Applying device sharing prefs for " << container_id;
ApplySharingState(std::move(container_id), std::move(shared_devices),
base::DoNothing());
}
} // namespace crostini
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