Atmosphere/libraries/libstratosphere/source/fs/fs_game_card.cpp
2022-03-21 17:21:44 -07:00

104 lines
4.4 KiB
C++

/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "fsa/fs_mount_utils.hpp"
#include "impl/fs_file_system_proxy_service_object.hpp"
#include "impl/fs_file_system_service_object_adapter.hpp"
namespace ams::fs {
namespace {
const char *GetGameCardMountNameSuffix(GameCardPartition which) {
switch (which) {
case GameCardPartition::Update: return impl::GameCardFileSystemMountNameUpdateSuffix;
case GameCardPartition::Normal: return impl::GameCardFileSystemMountNameNormalSuffix;
case GameCardPartition::Secure: return impl::GameCardFileSystemMountNameSecureSuffix;
AMS_UNREACHABLE_DEFAULT_CASE();
}
}
class GameCardCommonMountNameGenerator : public fsa::ICommonMountNameGenerator, public impl::Newable {
private:
const GameCardHandle m_handle;
const GameCardPartition m_partition;
public:
explicit GameCardCommonMountNameGenerator(GameCardHandle h, GameCardPartition p) : m_handle(h), m_partition(p) { /* ... */ }
virtual Result GenerateCommonMountName(char *dst, size_t dst_size) override {
/* Determine how much space we need. */
const size_t needed_size = util::Strnlen(impl::GameCardFileSystemMountName, MountNameLengthMax) + util::Strnlen(GetGameCardMountNameSuffix(m_partition), MountNameLengthMax) + sizeof(GameCardHandle) * 2 + 2;
AMS_ABORT_UNLESS(dst_size >= needed_size);
/* Generate the name. */
const auto size = util::SNPrintf(dst, dst_size, "%s%s%08x:", impl::GameCardFileSystemMountName, GetGameCardMountNameSuffix(m_partition), m_handle);
AMS_ASSERT(static_cast<size_t>(size) == needed_size - 1);
AMS_UNUSED(size);
return ResultSuccess();
}
};
}
Result GetGameCardHandle(GameCardHandle *out) {
auto fsp = impl::GetFileSystemProxyServiceObject();
/* Open a device operator. */
sf::SharedPointer<fssrv::sf::IDeviceOperator> device_operator;
AMS_FS_R_TRY(fsp->OpenDeviceOperator(std::addressof(device_operator)));
/* Get the handle. */
u32 handle;
AMS_FS_R_TRY(device_operator->GetGameCardHandle(std::addressof(handle)));
*out = handle;
R_SUCCEED();
}
Result MountGameCardPartition(const char *name, GameCardHandle handle, GameCardPartition partition) {
auto mount_impl = [=]() -> Result {
/* Validate the mount name. */
R_TRY(impl::CheckMountNameAllowingReserved(name));
/* Open the gamecard filesystem. */
auto fsp = impl::GetFileSystemProxyServiceObject();
sf::SharedPointer<fssrv::sf::IFileSystem> fs;
R_TRY(fsp->OpenGameCardFileSystem(std::addressof(fs), static_cast<u32>(handle), static_cast<u32>(partition)));
/* Allocate a new filesystem wrapper. */
auto fsa = std::make_unique<impl::FileSystemServiceObjectAdapter>(std::move(fs));
R_UNLESS(fsa != nullptr, fs::ResultAllocationMemoryFailedInGameCardC());
/* Allocate a new mountname generator. */
auto generator = std::make_unique<GameCardCommonMountNameGenerator>(handle, partition);
R_UNLESS(generator != nullptr, fs::ResultAllocationMemoryFailedInGameCardD());
/* Register. */
R_RETURN(fsa::Register(name, std::move(fsa), std::move(generator)));
};
/* Perform the mount. */
AMS_FS_R_TRY(AMS_FS_IMPL_ACCESS_LOG_SYSTEM_MOUNT(mount_impl(), name, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_GAME_CARD_PARTITION(name, handle, partition)));
/* Enable access logging. */
AMS_FS_IMPL_ACCESS_LOG_SYSTEM_FS_ACCESSOR_ENABLE(name);
R_SUCCEED();
}
}