/*
* Copyright (c) 2018-2020 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 "../amsmitm_fs_utils.hpp"
#include "fs_shim.h"
#include "fs_mitm_service.hpp"
#include "fsmitm_boot0storage.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 char AtmosphereHblWebContentDir[] = "/atmosphere/hbl_html/";
constexpr const char ProgramWebContentDir[] = "/manual_html/";
os::Mutex g_data_storage_lock;
os::Mutex g_storage_cache_lock;
std::unordered_map<u64, std::weak_ptr<IStorageInterface>> g_storage_cache;
std::shared_ptr<IStorageInterface> GetStorageCacheEntry(ncm::ProgramId program_id) {
std::scoped_lock lk(g_storage_cache_lock);
auto it = g_storage_cache.find(static_cast<u64>(program_id));
if (it == g_storage_cache.end()) {
return nullptr;
}
return it->second.lock();
}
void SetStorageCacheEntry(ncm::ProgramId program_id, std::shared_ptr<IStorageInterface> *new_intf) {
std::scoped_lock lk(g_storage_cache_lock);
auto it = g_storage_cache.find(static_cast<u64>(program_id));
if (it != g_storage_cache.end()) {
auto cur_intf = it->second.lock();
if (cur_intf != nullptr) {
*new_intf = cur_intf;
return;
}
}
g_storage_cache[static_cast<u64>(program_id)] = *new_intf;
}
bool GetSettingsItemBooleanValue(const char *name, const char *key) {
u8 tmp = 0;
AMS_ABORT_UNLESS(settings::fwdbg::GetSettingsItemValue(&tmp, sizeof(tmp), name, key) == sizeof(tmp));
return (tmp != 0);
}
Result OpenHblWebContentFileSystem(sf::Out<std::shared_ptr<IFileSystemInterface>> &out, ncm::ProgramId client_program_id, ncm::ProgramId program_id, FsFileSystemType filesystem_type) {
/* Verify eligibility. */
bool is_hbl;
R_UNLESS(R_SUCCEEDED(pm::info::IsHblProgramId(&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(&d, AtmosphereHblWebContentDir, fs::OpenDirectoryMode_Directory)), sm::mitm::ResultShouldForwardToSession());
fsDirClose(&d);
}
/* Open the SD card using fs.mitm's session. */
FsFileSystem sd_fs;
R_TRY(fsOpenSdCardFileSystem(&sd_fs));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&sd_fs.s)};
std::unique_ptr<fs::fsa::IFileSystem> sd_ifs = std::make_unique<fs::RemoteFileSystem>(sd_fs);
out.SetValue(std::make_shared<IFileSystemInterface>(std::make_shared<fs::ReadOnlyFileSystem>(std::make_unique<fssystem::SubDirectoryFileSystem>(std::move(sd_ifs), AtmosphereHblWebContentDir)), false), target_object_id);
return ResultSuccess();
}
Result OpenProgramSpecificWebContentFileSystem(sf::Out<std::shared_ptr<IFileSystemInterface>> &out, ncm::ProgramId client_program_id, ncm::ProgramId program_id, FsFileSystemType filesystem_type, Service *fwd, const fssrv::sf::Path *path, bool with_id) {
/* Directory must exist. */
{
FsDir d;
R_UNLESS(R_SUCCEEDED(mitm::fs::OpenAtmosphereSdDirectory(&d, program_id, ProgramWebContentDir, fs::OpenDirectoryMode_Directory)), sm::mitm::ResultShouldForwardToSession());
fsDirClose(&d);
}
/* Open the SD card using fs.mitm's session. */
FsFileSystem sd_fs;
R_TRY(fsOpenSdCardFileSystem(&sd_fs));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&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_path[fs::EntryNameLengthMax + 1];
FormatAtmosphereSdPath(program_web_content_path, sizeof(program_web_content_path), program_id, ProgramWebContentDir);
/* Make a new filesystem. */
{
std::unique_ptr<fs::fsa::IFileSystem> subdir_fs = std::make_unique<fssystem::SubDirectoryFileSystem>(std::move(sd_ifs), 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(std::make_shared<IFileSystemInterface>(std::move(new_fs), false), target_object_id);
}
return ResultSuccess();
}
Result OpenWebContentFileSystem(sf::Out<std::shared_ptr<IFileSystemInterface>> &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_UNLESS(R_FAILED(OpenHblWebContentFileSystem(out, client_program_id, program_id, filesystem_type)), ResultSuccess());
/* 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. */
return OpenProgramSpecificWebContentFileSystem(out, client_program_id, program_id, filesystem_type, fwd, path, with_id);
}
}
Result FsMitmService::OpenFileSystemWithPatch(sf::Out<std::shared_ptr<IFileSystemInterface>> out, ncm::ProgramId program_id, u32 _filesystem_type) {
return OpenWebContentFileSystem(out, this->client_info.program_id, program_id, static_cast<FsFileSystemType>(_filesystem_type), this->forward_service.get(), nullptr, false, this->client_info.override_status.IsProgramSpecific());
}
Result FsMitmService::OpenFileSystemWithId(sf::Out<std::shared_ptr<IFileSystemInterface>> out, const fssrv::sf::Path &path, ncm::ProgramId program_id, u32 _filesystem_type) {
return OpenWebContentFileSystem(out, this->client_info.program_id, program_id, static_cast<FsFileSystemType>(_filesystem_type), this->forward_service.get(), std::addressof(path), true, this->client_info.override_status.IsProgramSpecific());
}
Result FsMitmService::OpenSdCardFileSystem(sf::Out<std::shared_ptr<IFileSystemInterface>> out) {
/* We only care about redirecting this for NS/emummc. */
R_UNLESS(this->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(this->forward_service.get(), &sd_fs));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&sd_fs.s)};
/* Return output filesystem. */
std::shared_ptr<fs::fsa::IFileSystem> redir_fs = std::make_shared<fssystem::DirectoryRedirectionFileSystem>(std::make_shared<RemoteFileSystem>(sd_fs), "/Nintendo", emummc::GetNintendoDirPath());
out.SetValue(std::make_shared<IFileSystemInterface>(std::move(redir_fs), false), target_object_id);
return ResultSuccess();
}
Result FsMitmService::OpenSaveDataFileSystem(sf::Out<std::shared_ptr<IFileSystemInterface>> out, u8 _space_id, const FsSaveDataAttribute &attribute) {
/* We only want to intercept saves for games, right now. */
const bool is_game_or_hbl = this->client_info.override_status.IsHbl() || ncm::IsApplicationId(this->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(this->client_info.program_id, "redirect_save"), sm::mitm::ResultShouldForwardToSession());
/* Only redirect account savedata. */
R_UNLESS(attribute.save_data_type == FsSaveDataType_Account, sm::mitm::ResultShouldForwardToSession());
/* Get enum type for space id. */
auto space_id = static_cast<FsSaveDataSpaceId>(_space_id);
/* Verify we can open the save. */
FsFileSystem save_fs;
R_UNLESS(R_SUCCEEDED(fsOpenSaveDataFileSystemFwd(this->forward_service.get(), &save_fs, space_id, &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(&sd_fs));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&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.application_id == 0 ? this->client_info.program_id : ncm::ProgramId{attribute.application_id};
char save_dir_path[fs::EntryNameLengthMax + 1];
R_TRY(mitm::fs::SaveUtil::GetDirectorySaveDataPath(save_dir_path, sizeof(save_dir_path), application_id, space_id, attribute));
/* 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(&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::EnsureDirectoryRecursively(sd_ifs.get(), save_dir_path));
/* Create directory savedata filesystem. */
std::unique_ptr<fs::fsa::IFileSystem> subdir_fs = std::make_unique<fssystem::SubDirectoryFileSystem>(sd_ifs, 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());
/* If it's the first time we're making the save, copy existing savedata over. */
if (is_new_save) {
/* TODO: Check error? */
dirsave_ifs->CopySaveFromFileSystem(save_ifs.get());
}
/* Set output. */
out.SetValue(std::make_shared<IFileSystemInterface>(std::move(dirsave_ifs), false), target_object_id);
return ResultSuccess();
}
Result FsMitmService::OpenBisStorage(sf::Out<std::shared_ptr<IStorageInterface>> 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(this->forward_service.get(), &bis_storage, bis_partition_id));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&bis_storage.s)};
const bool is_sysmodule = ncm::IsSystemProgramId(this->client_info.program_id);
const bool is_hbl = this->client_info.override_status.IsHbl();
const bool can_write_bis = is_sysmodule || (is_hbl && GetSettingsItemBooleanValue("atmosphere", "enable_hbl_bis_write"));
const bool can_read_cal = is_sysmodule || (is_hbl && GetSettingsItemBooleanValue("atmosphere", "enable_hbl_cal_read"));
/* 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) {
out.SetValue(std::make_shared<IStorageInterface>(new Boot0Storage(bis_storage, this->client_info)), target_object_id);
} else if (bis_partition_id == FsBisPartitionId_CalibrationBinary) {
/* PRODINFO should *never* be writable. */
/* If we have permissions, create a read only storage. */
if (can_read_cal) {
out.SetValue(std::make_shared<IStorageInterface>(new ReadOnlyStorageAdapter(new RemoteStorage(bis_storage))), target_object_id);
} else {
/* If we can't read cal, return permission denied. */
fsStorageClose(&bis_storage);
return fs::ResultPermissionDenied();
}
} else {
if (can_write_bis || can_write_bis_for_choi_support) {
/* We can write, so create a writable storage. */
out.SetValue(std::make_shared<IStorageInterface>(new RemoteStorage(bis_storage)), target_object_id);
} else {
/* We can only read, so create a readable storage. */
out.SetValue(std::make_shared<IStorageInterface>(new ReadOnlyStorageAdapter(new RemoteStorage(bis_storage))), target_object_id);
}
}
return ResultSuccess();
}
Result FsMitmService::OpenDataStorageByCurrentProcess(sf::Out<std::shared_ptr<IStorageInterface>> out) {
/* Only mitm if we should override contents for the current process. */
R_UNLESS(this->client_info.override_status.IsProgramSpecific(), sm::mitm::ResultShouldForwardToSession());
/* Only mitm if there is actually an override romfs. */
R_UNLESS(mitm::fs::HasSdRomfsContent(this->client_info.program_id), sm::mitm::ResultShouldForwardToSession());
/* Try to open the process romfs. */
FsStorage data_storage;
R_TRY(fsOpenDataStorageByCurrentProcessFwd(this->forward_service.get(), &data_storage));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&data_storage.s)};
/* Get a scoped lock. */
std::scoped_lock lk(g_data_storage_lock);
/* Try to get a storage from the cache. */
{
std::shared_ptr<IStorageInterface> cached_storage = GetStorageCacheEntry(this->client_info.program_id);
if (cached_storage != nullptr) {
out.SetValue(std::move(cached_storage), target_object_id);
return ResultSuccess();
}
}
/* Make a new layered romfs, and cache to storage. */
{
std::shared_ptr<IStorageInterface> new_storage_intf = nullptr;
/* Create the layered storage. */
FsFile data_file;
if (R_SUCCEEDED(OpenAtmosphereSdFile(&data_file, this->client_info.program_id, "romfs.bin", OpenMode_Read))) {
auto layered_storage = std::make_shared<LayeredRomfsStorage>(std::make_unique<ReadOnlyStorageAdapter>(new RemoteStorage(data_storage)), std::make_unique<ReadOnlyStorageAdapter>(new FileStorage(new RemoteFile(data_file))), this->client_info.program_id);
layered_storage->BeginInitialize();
new_storage_intf = std::make_shared<IStorageInterface>(layered_storage);
} else {
auto layered_storage = std::make_shared<LayeredRomfsStorage>(std::make_unique<ReadOnlyStorageAdapter>(new RemoteStorage(data_storage)), nullptr, this->client_info.program_id);
layered_storage->BeginInitialize();
new_storage_intf = std::make_shared<IStorageInterface>(layered_storage);
}
SetStorageCacheEntry(this->client_info.program_id, &new_storage_intf);
out.SetValue(std::move(new_storage_intf), target_object_id);
}
return ResultSuccess();
}
Result FsMitmService::OpenDataStorageByDataId(sf::Out<std::shared_ptr<IStorageInterface>> out, ncm::DataId _data_id, u8 storage_id) {
/* Only mitm if we should override contents for the current process. */
R_UNLESS(this->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 process romfs. */
FsStorage data_storage;
R_TRY(fsOpenDataStorageByDataIdFwd(this->forward_service.get(), &data_storage, static_cast<u64>(data_id), static_cast<NcmStorageId>(storage_id)));
const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&data_storage.s)};
/* Get a scoped lock. */
std::scoped_lock lk(g_data_storage_lock);
/* Try to get a storage from the cache. */
{
std::shared_ptr<IStorageInterface> cached_storage = GetStorageCacheEntry(data_id);
if (cached_storage != nullptr) {
out.SetValue(std::move(cached_storage), target_object_id);
return ResultSuccess();
}
}
/* Make a new layered romfs, and cache to storage. */
{
std::shared_ptr<IStorageInterface> new_storage_intf = nullptr;
/* Create the layered storage. */
FsFile data_file;
if (R_SUCCEEDED(OpenAtmosphereSdFile(&data_file, data_id, "romfs.bin", OpenMode_Read))) {
auto layered_storage = std::make_shared<LayeredRomfsStorage>(std::make_unique<ReadOnlyStorageAdapter>(new RemoteStorage(data_storage)), std::make_unique<ReadOnlyStorageAdapter>(new FileStorage(new RemoteFile(data_file))), data_id);
layered_storage->BeginInitialize();
new_storage_intf = std::make_shared<IStorageInterface>(layered_storage);
} else {
auto layered_storage = std::make_shared<LayeredRomfsStorage>(std::make_unique<ReadOnlyStorageAdapter>(new RemoteStorage(data_storage)), nullptr, data_id);
layered_storage->BeginInitialize();
new_storage_intf = std::make_shared<IStorageInterface>(layered_storage);
}
SetStorageCacheEntry(data_id, &new_storage_intf);
out.SetValue(std::move(new_storage_intf), target_object_id);
}
return ResultSuccess();
}
}
