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arc_appfuse_provider_client.cc
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arc_appfuse_provider_client.cc
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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/dbus/arc_appfuse_provider_client.h"
#include <utility>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_proxy.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace chromeos {
namespace {
class ArcAppfuseProviderClientImpl : public ArcAppfuseProviderClient {
public:
ArcAppfuseProviderClientImpl() : weak_ptr_factory_(this) {}
~ArcAppfuseProviderClientImpl() override = default;
// ArcAppfuseProviderClient override:
void Mount(uint32_t uid,
int32_t mount_id,
DBusMethodCallback<base::ScopedFD> callback) override {
dbus::MethodCall method_call(arc::appfuse::kArcAppfuseProviderInterface,
arc::appfuse::kMountMethod);
dbus::MessageWriter writer(&method_call);
writer.AppendUint32(uid);
writer.AppendInt32(mount_id);
proxy_->CallMethod(
&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&ArcAppfuseProviderClientImpl::OnFDMethod,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
}
void Unmount(uint32_t uid,
int32_t mount_id,
VoidDBusMethodCallback callback) override {
dbus::MethodCall method_call(arc::appfuse::kArcAppfuseProviderInterface,
arc::appfuse::kUnmountMethod);
dbus::MessageWriter writer(&method_call);
writer.AppendUint32(uid);
writer.AppendInt32(mount_id);
proxy_->CallMethod(
&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&ArcAppfuseProviderClientImpl::OnVoidDBusMethod,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
}
void OpenFile(uint32_t uid,
int32_t mount_id,
int32_t file_id,
int32_t flags,
DBusMethodCallback<base::ScopedFD> callback) override {
dbus::MethodCall method_call(arc::appfuse::kArcAppfuseProviderInterface,
arc::appfuse::kOpenFileMethod);
dbus::MessageWriter writer(&method_call);
writer.AppendUint32(uid);
writer.AppendInt32(mount_id);
writer.AppendInt32(file_id);
writer.AppendInt32(flags);
proxy_->CallMethod(
&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&ArcAppfuseProviderClientImpl::OnFDMethod,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
}
protected:
// DBusClient override.
void Init(dbus::Bus* bus) override {
proxy_ = bus->GetObjectProxy(
arc::appfuse::kArcAppfuseProviderServiceName,
dbus::ObjectPath(arc::appfuse::kArcAppfuseProviderServicePath));
}
private:
// Runs the callback with the method call result.
void OnVoidDBusMethod(VoidDBusMethodCallback callback,
dbus::Response* response) {
std::move(callback).Run(response != nullptr);
}
void OnFDMethod(DBusMethodCallback<base::ScopedFD> callback,
dbus::Response* response) {
if (!response) {
std::move(callback).Run(base::nullopt);
return;
}
dbus::MessageReader reader(response);
base::ScopedFD fd;
if (!reader.PopFileDescriptor(&fd)) {
LOG(ERROR) << "Failed to pop FD.";
std::move(callback).Run(base::nullopt);
return;
}
std::move(callback).Run(std::move(fd));
}
dbus::ObjectProxy* proxy_ = nullptr;
base::WeakPtrFactory<ArcAppfuseProviderClientImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ArcAppfuseProviderClientImpl);
};
} // namespace
ArcAppfuseProviderClient::ArcAppfuseProviderClient() = default;
ArcAppfuseProviderClient::~ArcAppfuseProviderClient() = default;
// static
std::unique_ptr<ArcAppfuseProviderClient> ArcAppfuseProviderClient::Create() {
return std::make_unique<ArcAppfuseProviderClientImpl>();
}
} // namespace chromeos