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Atmosphere/stratosphere/ams_mitm/source/fs_mitm/fs_mitm_service.cpp
SciresM f2ee44da74
romfs/ams.mitm/pm: refactor to dynamically steal heap for certain games. (#2122) 
* fs.mitm: skeleton the use of special allocation in romfs build

* pm: add api for ams.mitm to steal application memory

* pm/mitm: okay, that api won't work, try a different one

* romfs: revert memory usage increases; we'll handle torture games case-by-case.

* pm/romfs: first (broken?) pass at dynamic heap.

I cannot wait to figure out all the ways this is wrong.

* Release the dynamic heap a little more eagerly

* romfs: animal crossing is also not a nice game

* romfs: fix issues in close-during-build

* romfs: zelda is a blight upon this earth
2023-05-14 03:06:52 -07:00

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/*
* 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 "../amsmitm_fs_utils.hpp"
#include "../amsmitm_initialization.hpp"
#include "fs_shim.h"
#include "fs_mitm_service.hpp"
#include "fsmitm_boot0storage.hpp"
#include "fsmitm_calibration_binary_storage.hpp"
#include "fsmitm_layered_romfs_storage.hpp"
#include "fsmitm_save_utils.hpp"
#include "fsmitm_readonly_layered_filesystem.hpp"
namespace ams::mitm::fs {
using namespace ams::fs;
namespace {
constexpr const ams::fs::Path AtmosphereHblWebContentDirPath = fs::MakeConstantPath("/atmosphere/hbl_html/");
constexpr const char ProgramWebContentDir[] = "/manual_html/";
constinit os::SdkMutex g_boot0_detect_lock;
constinit bool g_detected_boot0_kind = false;
constinit bool g_is_boot0_custom_public_key = false;
constinit fssrv::impl::ProgramIndexMapInfoManager g_program_index_map_info_manager;
bool IsBoot0CustomPublicKey(::FsStorage &storage) {
if (AMS_UNLIKELY(!g_detected_boot0_kind)) {
std::scoped_lock lk(g_boot0_detect_lock);
if (AMS_LIKELY(!g_detected_boot0_kind)) {
g_is_boot0_custom_public_key = DetectBoot0CustomPublicKey(storage);
g_detected_boot0_kind = true;
}
}
return g_is_boot0_custom_public_key;
}
bool GetSettingsItemBooleanValue(const char *name, const char *key) {
u8 tmp = 0;
AMS_ABORT_UNLESS(settings::fwdbg::GetSettingsItemValue(std::addressof(tmp), sizeof(tmp), name, key) == sizeof(tmp));
return (tmp != 0);
}
template<typename... Arguments>
constexpr ALWAYS_INLINE auto MakeSharedFileSystem(Arguments &&... args) {
return sf::CreateSharedObjectEmplaced<ams::fssrv::sf::IFileSystem, ams::fssrv::impl::FileSystemInterfaceAdapter>(std::forward<Arguments>(args)...);
}
template<typename... Arguments>
constexpr ALWAYS_INLINE auto MakeSharedStorage(Arguments &&... args) {
return sf::CreateSharedObjectEmplaced<ams::fssrv::sf::IStorage, ams::fssrv::impl::StorageInterfaceAdapter>(std::forward<Arguments>(args)...);
}
Result OpenHblWebContentFileSystem(sf::Out<sf::SharedPointer<ams::fssrv::sf::IFileSystem>> &out, ncm::ProgramId program_id) {
/* Verify eligibility. */
bool is_hbl;
R_UNLESS(R_SUCCEEDED(ams::pm::info::IsHblProgramId(std::addressof(is_hbl), program_id)), sm::mitm::ResultShouldForwardToSession());
R_UNLESS(is_hbl, sm::mitm::ResultShouldForwardToSession());
/* Hbl html directory must exist. */
{
FsDir d;
R_UNLESS(R_SUCCEEDED(mitm::fs::OpenSdDirectory(std::addressof(d), AtmosphereHblWebContentDirPath.GetString(), fs::OpenDirectoryMode_Directory)), sm::mitm::ResultShouldForwardToSession());
fsDirClose(std::addressof(d));
}
/* Open the SD card using fs.mitm's session. */
FsFileSystem sd_fs;
R_TRY(fsOpenSdCardFileSystem(std::addressof(sd_fs)));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(std::addressof(sd_fs.s))};
std::unique_ptr<fs::fsa::IFileSystem> sd_ifs = std::make_unique<fs::RemoteFileSystem>(sd_fs);
auto subdir_fs = std::make_unique<fssystem::SubDirectoryFileSystem>(std::move(sd_ifs));
R_TRY(subdir_fs->Initialize(AtmosphereHblWebContentDirPath));
out.SetValue(MakeSharedFileSystem(std::make_shared<fs::ReadOnlyFileSystem>(std::move(subdir_fs)), false), target_object_id);
R_SUCCEED();
}
Result OpenProgramSpecificWebContentFileSystem(sf::Out<sf::SharedPointer<ams::fssrv::sf::IFileSystem>> &out, ncm::ProgramId program_id, FsFileSystemType filesystem_type, Service *fwd, const fssrv::sf::Path *path, bool with_id) {
/* Directory must exist. */
R_UNLESS(HasSdManualHtmlContent(program_id), sm::mitm::ResultShouldForwardToSession());
/* Open the SD card using fs.mitm's session. */
FsFileSystem sd_fs;
R_TRY(fsOpenSdCardFileSystem(std::addressof(sd_fs)));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(std::addressof(sd_fs.s))};
std::unique_ptr<fs::fsa::IFileSystem> sd_ifs = std::make_unique<fs::RemoteFileSystem>(sd_fs);
/* Format the subdirectory path. */
char program_web_content_raw_path[0x100];
FormatAtmosphereSdPath(program_web_content_raw_path, sizeof(program_web_content_raw_path), program_id, ProgramWebContentDir);
ams::fs::Path program_web_content_path;
R_TRY(program_web_content_path.SetShallowBuffer(program_web_content_raw_path));
/* Make a new filesystem. */
{
auto subdir_fs = std::make_unique<fssystem::SubDirectoryFileSystem>(std::move(sd_ifs));
R_TRY(subdir_fs->Initialize(program_web_content_path));
std::shared_ptr<fs::fsa::IFileSystem> new_fs = nullptr;
/* Try to open the existing fs. */
FsFileSystem base_fs;
bool opened_base_fs = false;
if (with_id) {
opened_base_fs = R_SUCCEEDED(fsOpenFileSystemWithIdFwd(fwd, std::addressof(base_fs), static_cast<u64>(program_id), filesystem_type, path->str));
} else {
opened_base_fs = R_SUCCEEDED(fsOpenFileSystemWithPatchFwd(fwd, std::addressof(base_fs), static_cast<u64>(program_id), filesystem_type));
}
if (opened_base_fs) {
/* Create a layered adapter. */
new_fs = std::make_shared<ReadOnlyLayeredFileSystem>(std::move(subdir_fs), std::make_unique<fs::RemoteFileSystem>(base_fs));
} else {
/* Without an existing FS, just make a read only adapter to the subdirectory. */
new_fs = std::make_shared<fs::ReadOnlyFileSystem>(std::move(subdir_fs));
}
out.SetValue(MakeSharedFileSystem(std::move(new_fs), false), target_object_id);
}
R_SUCCEED();
}
Result OpenWebContentFileSystem(sf::Out<sf::SharedPointer<ams::fssrv::sf::IFileSystem>> &out, ncm::ProgramId client_program_id, ncm::ProgramId program_id, FsFileSystemType filesystem_type, Service *fwd, const fssrv::sf::Path *path, bool with_id, bool try_program_specific) {
/* Check first that we're a web applet opening web content. */
R_UNLESS(ncm::IsWebAppletId(client_program_id), sm::mitm::ResultShouldForwardToSession());
R_UNLESS(filesystem_type == FsFileSystemType_ContentManual, sm::mitm::ResultShouldForwardToSession());
/* Try to mount the HBL web filesystem. If this succeeds then we're done. */
R_SUCCEED_IF(R_SUCCEEDED(OpenHblWebContentFileSystem(out, program_id)));
/* If program specific override shouldn't be attempted, fall back. */
R_UNLESS(try_program_specific, sm::mitm::ResultShouldForwardToSession());
/* If we're not opening a HBL filesystem, just try to open a generic one. */
R_RETURN(OpenProgramSpecificWebContentFileSystem(out, program_id, filesystem_type, fwd, path, with_id));
}
}
bool HasSdManualHtmlContent(ncm::ProgramId program_id) {
/* Directory must exist. */
FsDir d;
if (R_SUCCEEDED(OpenAtmosphereSdDirectory(std::addressof(d), program_id, ProgramWebContentDir, fs::OpenDirectoryMode_Directory))) {
::fsDirClose(std::addressof(d));
return true;
} else {
return false;
}
}
Result FsMitmService::OpenFileSystemWithPatch(sf::Out<sf::SharedPointer<ams::fssrv::sf::IFileSystem>> out, ncm::ProgramId program_id, u32 _filesystem_type) {
R_RETURN(OpenWebContentFileSystem(out, m_client_info.program_id, program_id, static_cast<FsFileSystemType>(_filesystem_type), m_forward_service.get(), nullptr, false, m_client_info.override_status.IsProgramSpecific()));
}
Result FsMitmService::OpenFileSystemWithId(sf::Out<sf::SharedPointer<ams::fssrv::sf::IFileSystem>> out, const fssrv::sf::Path &path, ncm::ProgramId program_id, u32 _filesystem_type) {
R_RETURN(OpenWebContentFileSystem(out, m_client_info.program_id, program_id, static_cast<FsFileSystemType>(_filesystem_type), m_forward_service.get(), std::addressof(path), true, m_client_info.override_status.IsProgramSpecific()));
}
Result FsMitmService::OpenSdCardFileSystem(sf::Out<sf::SharedPointer<ams::fssrv::sf::IFileSystem>> out) {
/* We only care about redirecting this for NS/emummc. */
R_UNLESS(m_client_info.program_id == ncm::SystemProgramId::Ns, sm::mitm::ResultShouldForwardToSession());
R_UNLESS(emummc::IsActive(), sm::mitm::ResultShouldForwardToSession());
/* Create a new SD card filesystem. */
FsFileSystem sd_fs;
R_TRY(fsOpenSdCardFileSystemFwd(m_forward_service.get(), std::addressof(sd_fs)));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(std::addressof(sd_fs.s))};
/* Return output filesystem. */
auto redir_fs = std::make_shared<fssystem::DirectoryRedirectionFileSystem>(std::make_unique<RemoteFileSystem>(sd_fs));
R_TRY(redir_fs->InitializeWithFixedPath("/Nintendo", emummc::GetNintendoDirPath()));
out.SetValue(MakeSharedFileSystem(std::move(redir_fs), false), target_object_id);
R_SUCCEED();
}
Result FsMitmService::OpenSaveDataFileSystem(sf::Out<sf::SharedPointer<ams::fssrv::sf::IFileSystem>> out, u8 _space_id, const fs::SaveDataAttribute &attribute) {
/* We only want to intercept saves for games, right now. */
const bool is_game_or_hbl = m_client_info.override_status.IsHbl() || ncm::IsApplicationId(m_client_info.program_id);
R_UNLESS(is_game_or_hbl, sm::mitm::ResultShouldForwardToSession());
/* Only redirect if the appropriate system setting is set. */
R_UNLESS(GetSettingsItemBooleanValue("atmosphere", "fsmitm_redirect_saves_to_sd"), sm::mitm::ResultShouldForwardToSession());
/* Only redirect if the specific title being accessed has a redirect save flag. */
R_UNLESS(cfg::HasContentSpecificFlag(m_client_info.program_id, "redirect_save"), sm::mitm::ResultShouldForwardToSession());
/* Only redirect account savedata. */
R_UNLESS(attribute.type == fs::SaveDataType::Account, sm::mitm::ResultShouldForwardToSession());
/* Get enum type for space id. */
auto space_id = static_cast<FsSaveDataSpaceId>(_space_id);
/* Verify we can open the save. */
static_assert(sizeof(fs::SaveDataAttribute) == sizeof(::FsSaveDataAttribute));
FsFileSystem save_fs;
R_UNLESS(R_SUCCEEDED(fsOpenSaveDataFileSystemFwd(m_forward_service.get(), std::addressof(save_fs), space_id, reinterpret_cast<const FsSaveDataAttribute *>(std::addressof(attribute)))), sm::mitm::ResultShouldForwardToSession());
std::unique_ptr<fs::fsa::IFileSystem> save_ifs = std::make_unique<fs::RemoteFileSystem>(save_fs);
/* Mount the SD card using fs.mitm's session. */
FsFileSystem sd_fs;
R_TRY(fsOpenSdCardFileSystem(std::addressof(sd_fs)));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(std::addressof(sd_fs.s))};
std::shared_ptr<fs::fsa::IFileSystem> sd_ifs = std::make_shared<fs::RemoteFileSystem>(sd_fs);
/* Verify that we can open the save directory, and that it exists. */
const ncm::ProgramId application_id = attribute.program_id == ncm::InvalidProgramId ? m_client_info.program_id : attribute.program_id;
char save_dir_raw_path[0x100];
R_TRY(mitm::fs::SaveUtil::GetDirectorySaveDataPath(save_dir_raw_path, sizeof(save_dir_raw_path), application_id, space_id, attribute));
ams::fs::Path save_dir_path;
R_TRY(save_dir_path.SetShallowBuffer(save_dir_raw_path));
/* Check if this is the first time we're making the save. */
bool is_new_save = false;
{
fs::DirectoryEntryType ent;
R_TRY_CATCH(sd_ifs->GetEntryType(std::addressof(ent), save_dir_path)) {
R_CATCH(fs::ResultPathNotFound) { is_new_save = true; }
R_CATCH_ALL() { /* ... */ }
} R_END_TRY_CATCH;
}
/* Ensure the directory exists. */
R_TRY(fssystem::EnsureDirectory(sd_ifs.get(), save_dir_path));
/* Create directory savedata filesystem. */
auto subdir_fs = std::make_unique<fssystem::SubDirectoryFileSystem>(sd_ifs);
R_TRY(subdir_fs->Initialize(save_dir_path));
std::shared_ptr<fssystem::DirectorySaveDataFileSystem> dirsave_ifs = std::make_shared<fssystem::DirectorySaveDataFileSystem>(std::move(subdir_fs));
/* Ensure correct directory savedata filesystem state. */
R_TRY(dirsave_ifs->Initialize(true, true, true));
/* If it's the first time we're making the save, copy existing savedata over. */
if (is_new_save) {
/* TODO: Check error? */
fs::DirectoryEntry work_entry;
constexpr const fs::Path root_path = fs::MakeConstantPath("/");
u8 savedata_copy_buffer[2_KB];
fssystem::CopyDirectoryRecursively(dirsave_ifs.get(), save_ifs.get(), root_path, root_path, std::addressof(work_entry), savedata_copy_buffer, sizeof(savedata_copy_buffer));
}
/* Set output. */
out.SetValue(MakeSharedFileSystem(std::move(dirsave_ifs), false), target_object_id);
R_SUCCEED();
}
Result FsMitmService::OpenBisStorage(sf::Out<sf::SharedPointer<ams::fssrv::sf::IStorage>> out, u32 _bis_partition_id) {
const ::FsBisPartitionId bis_partition_id = static_cast<::FsBisPartitionId>(_bis_partition_id);
/* Try to open a storage for the partition. */
FsStorage bis_storage;
R_TRY(fsOpenBisStorageFwd(m_forward_service.get(), std::addressof(bis_storage), bis_partition_id));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(std::addressof(bis_storage.s))};
const bool is_sysmodule = ncm::IsSystemProgramId(m_client_info.program_id);
const bool is_hbl = m_client_info.override_status.IsHbl();
const bool can_write_bis = is_sysmodule || (is_hbl && GetSettingsItemBooleanValue("atmosphere", "enable_hbl_bis_write"));
/* Allow HBL to write to boot1 (safe firm) + package2. */
/* This is needed to not break compatibility with ChoiDujourNX, which does not check for write access before beginning an update. */
/* TODO: get fixed so that this can be turned off without causing bricks :/ */
const bool is_package2 = (FsBisPartitionId_BootConfigAndPackage2Part1 <= bis_partition_id && bis_partition_id <= FsBisPartitionId_BootConfigAndPackage2Part6);
const bool is_boot1 = bis_partition_id == FsBisPartitionId_BootPartition2Root;
const bool can_write_bis_for_choi_support = is_hbl && (is_package2 || is_boot1);
/* Set output storage. */
if (bis_partition_id == FsBisPartitionId_BootPartition1Root) {
if (IsBoot0CustomPublicKey(bis_storage)) {
out.SetValue(MakeSharedStorage(std::make_shared<CustomPublicKeyBoot0Storage>(bis_storage, m_client_info, spl::GetSocType())), target_object_id);
} else {
out.SetValue(MakeSharedStorage(std::make_shared<Boot0Storage>(bis_storage, m_client_info)), target_object_id);
}
} else if (bis_partition_id == FsBisPartitionId_CalibrationBinary) {
out.SetValue(MakeSharedStorage(std::make_shared<CalibrationBinaryStorage>(bis_storage, m_client_info)), target_object_id);
} else {
if (can_write_bis || can_write_bis_for_choi_support) {
/* We can write, so create a writable storage. */
out.SetValue(MakeSharedStorage(std::make_shared<RemoteStorage>(bis_storage)), target_object_id);
} else {
/* We can only read, so create a readable storage. */
std::unique_ptr<ams::fs::IStorage> unique_bis = std::make_unique<RemoteStorage>(bis_storage);
out.SetValue(MakeSharedStorage(std::make_shared<ReadOnlyStorageAdapter>(std::move(unique_bis))), target_object_id);
}
}
R_SUCCEED();
}
Result FsMitmService::OpenDataStorageByCurrentProcess(sf::Out<sf::SharedPointer<ams::fssrv::sf::IStorage>> out) {
/* Only mitm if we should override contents for the current process. */
R_UNLESS(m_client_info.override_status.IsProgramSpecific(), sm::mitm::ResultShouldForwardToSession());
/* Only mitm if there is actually an override romfs. */
R_UNLESS(mitm::fs::HasSdRomfsContent(m_client_info.program_id), sm::mitm::ResultShouldForwardToSession());
/* Try to open the process romfs. */
FsStorage data_storage;
R_TRY(fsOpenDataStorageByCurrentProcessFwd(m_forward_service.get(), std::addressof(data_storage)));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(std::addressof(data_storage.s))};
/* Get a layered storage for the process romfs. */
out.SetValue(MakeSharedStorage(GetLayeredRomfsStorage(m_client_info.program_id, data_storage, true)), target_object_id);
R_SUCCEED();
}
Result FsMitmService::OpenDataStorageByDataId(sf::Out<sf::SharedPointer<ams::fssrv::sf::IStorage>> out, ncm::DataId _data_id, u8 storage_id) {
/* Only mitm if we should override contents for the current process. */
R_UNLESS(m_client_info.override_status.IsProgramSpecific(), sm::mitm::ResultShouldForwardToSession());
/* TODO: Decide how to handle DataId vs ProgramId for this API. */
const ncm::ProgramId data_id = {_data_id.value};
/* Only mitm if there is actually an override romfs. */
R_UNLESS(mitm::fs::HasSdRomfsContent(data_id), sm::mitm::ResultShouldForwardToSession());
/* Try to open the data id. */
FsStorage data_storage;
R_TRY(fsOpenDataStorageByDataIdFwd(m_forward_service.get(), std::addressof(data_storage), static_cast<u64>(data_id), static_cast<NcmStorageId>(storage_id)));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(std::addressof(data_storage.s))};
/* Get a layered storage for the data id. */
out.SetValue(MakeSharedStorage(GetLayeredRomfsStorage(data_id, data_storage, false)), target_object_id);
R_SUCCEED();
}
Result FsMitmService::OpenDataStorageWithProgramIndex(sf::Out<sf::SharedPointer<ams::fssrv::sf::IStorage>> out, u8 program_index) {
/* Only mitm if we should override contents for the current process. */
R_UNLESS(m_client_info.override_status.IsProgramSpecific(), sm::mitm::ResultShouldForwardToSession());
/* Get the relevant program id. */
const ncm::ProgramId program_id = g_program_index_map_info_manager.GetProgramId(m_client_info.program_id, program_index);
/* If we don't know about the program or don't have content, forward. */
R_UNLESS(program_id != ncm::InvalidProgramId, sm::mitm::ResultShouldForwardToSession());
R_UNLESS(mitm::fs::HasSdRomfsContent(program_id), sm::mitm::ResultShouldForwardToSession());
/* Try to open the process romfs. */
FsStorage data_storage;
R_TRY(fsOpenDataStorageWithProgramIndexFwd(m_forward_service.get(), std::addressof(data_storage), program_index));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(std::addressof(data_storage.s))};
/* Get a layered storage for the process romfs. */
out.SetValue(MakeSharedStorage(GetLayeredRomfsStorage(program_id, data_storage, true)), target_object_id);
R_SUCCEED();
}
Result FsMitmService::RegisterProgramIndexMapInfo(const sf::InBuffer &info_buffer, s32 info_count) {
/* Try to register with FS. */
R_TRY(fsRegisterProgramIndexMapInfoFwd(m_forward_service.get(), info_buffer.GetPointer(), info_buffer.GetSize(), info_count));
/* Register with ourselves. */
R_ABORT_UNLESS(g_program_index_map_info_manager.Reset(reinterpret_cast<const fs::ProgramIndexMapInfo *>(info_buffer.GetPointer()), info_count));
R_SUCCEED();
}
}
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