mirror of
https://github.com/Atmosphere-NX/Atmosphere
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212 lines
11 KiB
C++
212 lines
11 KiB
C++
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "../amsmitm_fs_utils.hpp"
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#include "fs_shim.h"
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#include "fs_mitm_service.hpp"
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#include "fsmitm_boot0storage.hpp"
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#include "fsmitm_layered_romfs_storage.hpp"
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namespace ams::mitm::fs {
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using namespace ams::fs;
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namespace {
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os::Mutex g_storage_cache_lock;
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std::unordered_map<u64, std::weak_ptr<IStorageInterface>> g_storage_cache;
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std::shared_ptr<IStorageInterface> GetStorageCacheEntry(ncm::ProgramId program_id) {
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std::scoped_lock lk(g_storage_cache_lock);
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auto it = g_storage_cache.find(static_cast<u64>(program_id));
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if (it == g_storage_cache.end()) {
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return nullptr;
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}
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return it->second.lock();
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}
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void SetStorageCacheEntry(ncm::ProgramId program_id, std::shared_ptr<IStorageInterface> *new_intf) {
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std::scoped_lock lk(g_storage_cache_lock);
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auto it = g_storage_cache.find(static_cast<u64>(program_id));
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if (it != g_storage_cache.end()) {
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auto cur_intf = it->second.lock();
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if (cur_intf != nullptr) {
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*new_intf = cur_intf;
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return;
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}
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}
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g_storage_cache[static_cast<u64>(program_id)] = *new_intf;
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}
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bool GetSettingsItemBooleanValue(const char *name, const char *key) {
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u8 tmp = 0;
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AMS_ASSERT(settings::fwdbg::GetSettingsItemValue(&tmp, sizeof(tmp), name, key) == sizeof(tmp));
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return (tmp != 0);
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}
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}
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Result FsMitmService::OpenSdCardFileSystem(sf::Out<std::shared_ptr<IFileSystemInterface>> out) {
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/* We only care about redirecting this for NS/emummc. */
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R_UNLESS(this->client_info.program_id == ncm::ProgramId::Ns, sm::mitm::ResultShouldForwardToSession());
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R_UNLESS(emummc::IsActive(), sm::mitm::ResultShouldForwardToSession());
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/* Create a new SD card filesystem. */
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FsFileSystem sd_fs;
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R_TRY(fsOpenSdCardFileSystemFwd(this->forward_service.get(), &sd_fs));
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const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&sd_fs.s)};
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/* Return output filesystem. */
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std::shared_ptr<fs::fsa::IFileSystem> redir_fs = std::make_shared<fssystem::DirectoryRedirectionFileSystem>(std::make_shared<RemoteFileSystem>(sd_fs), "/Nintendo", emummc::GetNintendoDirPath());
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out.SetValue(std::make_shared<IFileSystemInterface>(std::move(redir_fs), false), target_object_id);
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return ResultSuccess();
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}
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Result FsMitmService::OpenBisStorage(sf::Out<std::shared_ptr<IStorageInterface>> out, u32 _bis_partition_id) {
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const ::FsBisPartitionId bis_partition_id = static_cast<::FsBisPartitionId>(_bis_partition_id);
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/* Try to open a storage for the partition. */
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FsStorage bis_storage;
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R_TRY(fsOpenBisStorageFwd(this->forward_service.get(), &bis_storage, bis_partition_id));
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const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&bis_storage.s)};
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const bool is_sysmodule = ncm::IsSystemProgramId(this->client_info.program_id);
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const bool is_hbl = this->client_info.override_status.IsHbl();
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const bool can_write_bis = is_sysmodule || (is_hbl && GetSettingsItemBooleanValue("atmosphere", "enable_hbl_bis_write"));
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const bool can_read_cal = is_sysmodule || (is_hbl && GetSettingsItemBooleanValue("atmosphere", "enable_hbl_cal_read"));
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/* Allow HBL to write to boot1 (safe firm) + package2. */
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/* This is needed to not break compatibility with ChoiDujourNX, which does not check for write access before beginning an update. */
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/* TODO: get fixed so that this can be turned off without causing bricks :/ */
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const bool is_package2 = (FsBisPartitionId_BootConfigAndPackage2Part1 <= bis_partition_id && bis_partition_id <= FsBisPartitionId_BootConfigAndPackage2Part6);
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const bool is_boot1 = bis_partition_id == FsBisPartitionId_BootPartition2Root;
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const bool can_write_bis_for_choi_support = is_hbl && (is_package2 || is_boot1);
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/* Set output storage. */
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if (bis_partition_id == FsBisPartitionId_BootPartition1Root) {
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out.SetValue(std::make_shared<IStorageInterface>(new Boot0Storage(bis_storage, this->client_info)), target_object_id);
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} else if (bis_partition_id == FsBisPartitionId_CalibrationBinary) {
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/* PRODINFO should *never* be writable. */
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/* If we have permissions, create a read only storage. */
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if (can_read_cal) {
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out.SetValue(std::make_shared<IStorageInterface>(new ReadOnlyStorageAdapter(new RemoteStorage(bis_storage))), target_object_id);
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} else {
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/* If we can't read cal, return permission denied. */
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fsStorageClose(&bis_storage);
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return fs::ResultPermissionDenied();
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}
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} else {
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if (can_write_bis || can_write_bis_for_choi_support) {
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/* We can write, so create a writable storage. */
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out.SetValue(std::make_shared<IStorageInterface>(new RemoteStorage(bis_storage)), target_object_id);
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} else {
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/* We can only read, so create a readable storage. */
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out.SetValue(std::make_shared<IStorageInterface>(new ReadOnlyStorageAdapter(new RemoteStorage(bis_storage))), target_object_id);
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}
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}
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return ResultSuccess();
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}
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Result FsMitmService::OpenDataStorageByCurrentProcess(sf::Out<std::shared_ptr<IStorageInterface>> out) {
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/* Only mitm if we should override contents for the current process. */
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R_UNLESS(this->client_info.override_status.IsProgramSpecific(), sm::mitm::ResultShouldForwardToSession());
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/* Only mitm if there is actually an override romfs. */
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R_UNLESS(mitm::fs::HasSdRomfsContent(this->client_info.program_id), sm::mitm::ResultShouldForwardToSession());
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/* Try to open the process romfs. */
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FsStorage data_storage;
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R_TRY(fsOpenDataStorageByCurrentProcessFwd(this->forward_service.get(), &data_storage));
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const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&data_storage.s)};
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/* Try to get a storage from the cache. */
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{
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std::shared_ptr<IStorageInterface> cached_storage = GetStorageCacheEntry(this->client_info.program_id);
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if (cached_storage != nullptr) {
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out.SetValue(std::move(cached_storage), target_object_id);
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return ResultSuccess();
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}
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}
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/* Make a new layered romfs, and cache to storage. */
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{
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std::shared_ptr<IStorageInterface> new_storage_intf = nullptr;
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/* Create the layered storage. */
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FsFile data_file;
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if (R_SUCCEEDED(OpenAtmosphereSdFile(&data_file, this->client_info.program_id, "romfs.bin", OpenMode_Read))) {
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auto *layered_storage = new LayeredRomfsStorage(std::make_unique<ReadOnlyStorageAdapter>(new RemoteStorage(data_storage)), std::make_unique<ReadOnlyStorageAdapter>(new FileStorage(new RemoteFile(data_file))), this->client_info.program_id);
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new_storage_intf = std::make_shared<IStorageInterface>(layered_storage);
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} else {
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auto *layered_storage = new LayeredRomfsStorage(std::make_unique<ReadOnlyStorageAdapter>(new RemoteStorage(data_storage)), nullptr, this->client_info.program_id);
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new_storage_intf = std::make_shared<IStorageInterface>(layered_storage);
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}
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SetStorageCacheEntry(this->client_info.program_id, &new_storage_intf);
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out.SetValue(std::move(new_storage_intf), target_object_id);
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}
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return ResultSuccess();
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}
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Result FsMitmService::OpenDataStorageByDataId(sf::Out<std::shared_ptr<IStorageInterface>> out, ncm::ProgramId /* TODO: ncm::DataId */ data_id, u8 storage_id) {
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/* Only mitm if we should override contents for the current process. */
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R_UNLESS(this->client_info.override_status.IsProgramSpecific(), sm::mitm::ResultShouldForwardToSession());
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/* Only mitm if there is actually an override romfs. */
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R_UNLESS(mitm::fs::HasSdRomfsContent(data_id), sm::mitm::ResultShouldForwardToSession());
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/* Try to open the process romfs. */
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FsStorage data_storage;
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R_TRY(fsOpenDataStorageByDataIdFwd(this->forward_service.get(), &data_storage, static_cast<u64>(data_id), static_cast<NcmStorageId>(storage_id)));
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const sf::cmif::DomainObjectId target_object_id{serviceGetObjectId(&data_storage.s)};
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/* Try to get a storage from the cache. */
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{
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std::shared_ptr<IStorageInterface> cached_storage = GetStorageCacheEntry(data_id);
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if (cached_storage != nullptr) {
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out.SetValue(std::move(cached_storage), target_object_id);
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return ResultSuccess();
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}
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}
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/* Make a new layered romfs, and cache to storage. */
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{
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std::shared_ptr<IStorageInterface> new_storage_intf = nullptr;
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/* Create the layered storage. */
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FsFile data_file;
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if (R_SUCCEEDED(OpenAtmosphereSdFile(&data_file, data_id, "romfs.bin", OpenMode_Read))) {
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auto *layered_storage = new LayeredRomfsStorage(std::make_unique<ReadOnlyStorageAdapter>(new RemoteStorage(data_storage)), std::make_unique<ReadOnlyStorageAdapter>(new FileStorage(new RemoteFile(data_file))), data_id);
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new_storage_intf = std::make_shared<IStorageInterface>(layered_storage);
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} else {
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auto *layered_storage = new LayeredRomfsStorage(std::make_unique<ReadOnlyStorageAdapter>(new RemoteStorage(data_storage)), nullptr, data_id);
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new_storage_intf = std::make_shared<IStorageInterface>(layered_storage);
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}
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SetStorageCacheEntry(data_id, &new_storage_intf);
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out.SetValue(std::move(new_storage_intf), target_object_id);
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}
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return ResultSuccess();
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}
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}
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