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https://github.com/Atmosphere-NX/Atmosphere.git
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393 lines
16 KiB
C++
393 lines
16 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 <map>
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#include <memory>
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#include <mutex>
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#include <switch.h>
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#include <stratosphere.hpp>
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#include "fsmitm_service.hpp"
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#include "fs_shim.h"
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#include "../utils.hpp"
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#include "fsmitm_boot0storage.hpp"
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#include "fsmitm_layeredrom.hpp"
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#include "fs_dir_utils.hpp"
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#include "fs_save_utils.hpp"
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#include "fs_file_storage.hpp"
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#include "fs_subdirectory_filesystem.hpp"
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#include "fs_directory_redirection_filesystem.hpp"
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#include "fs_directory_savedata_filesystem.hpp"
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#include "../debug.hpp"
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static HosMutex g_StorageCacheLock;
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static std::unordered_map<u64, std::weak_ptr<IStorageInterface>> g_StorageCache;
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static bool StorageCacheGetEntry(u64 title_id, std::shared_ptr<IStorageInterface> *out) {
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std::scoped_lock<HosMutex> lock(g_StorageCacheLock);
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if (g_StorageCache.find(title_id) == g_StorageCache.end()) {
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return false;
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}
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auto intf = g_StorageCache[title_id].lock();
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if (intf != nullptr) {
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*out = intf;
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return true;
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}
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return false;
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}
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static void StorageCacheSetEntry(u64 title_id, std::shared_ptr<IStorageInterface> *ptr) {
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std::scoped_lock<HosMutex> lock(g_StorageCacheLock);
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/* Ensure we always use the cached copy if present. */
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if (g_StorageCache.find(title_id) != g_StorageCache.end()) {
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auto intf = g_StorageCache[title_id].lock();
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if (intf != nullptr) {
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*ptr = intf;
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}
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}
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g_StorageCache[title_id] = *ptr;
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}
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void FsMitmService::PostProcess(IMitmServiceObject *obj, IpcResponseContext *ctx) {
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auto this_ptr = static_cast<FsMitmService *>(obj);
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switch ((FspSrvCmd)ctx->cmd_id) {
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case FspSrvCmd_SetCurrentProcess:
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if (R_SUCCEEDED(ctx->rc)) {
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this_ptr->has_initialized = true;
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this_ptr->process_id = ctx->request.Pid;
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this_ptr->title_id = this_ptr->process_id;
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if (R_FAILED(MitmQueryUtils::GetAssociatedTidForPid(this_ptr->process_id, &this_ptr->title_id))) {
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/* Log here, if desired. */
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}
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break;
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}
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break;
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default:
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break;
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}
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}
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Result FsMitmService::OpenHblWebContentFileSystem(Out<std::shared_ptr<IFileSystemInterface>> &out_fs) {
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/* Mount the SD card using fs.mitm's session. */
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FsFileSystem sd_fs;
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R_TRY(fsMountSdcard(&sd_fs));
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/* Set output filesystem. */
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std::unique_ptr<IFileSystem> web_ifs = std::make_unique<SubDirectoryFileSystem>(std::make_shared<ProxyFileSystem>(sd_fs), AtmosphereHblWebContentDir);
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out_fs.SetValue(std::make_shared<IFileSystemInterface>(std::move(web_ifs)));
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if (out_fs.IsDomain()) {
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out_fs.ChangeObjectId(sd_fs.s.object_id);
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}
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return ResultSuccess;
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}
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Result FsMitmService::OpenFileSystemWithPatch(Out<std::shared_ptr<IFileSystemInterface>> out_fs, u64 title_id, u32 filesystem_type) {
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/* Check for eligibility. */
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{
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FsDir d;
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if (!Utils::IsWebAppletTid(this->title_id) || filesystem_type != FsFileSystemType_ContentManual || !Utils::IsHblTid(title_id) ||
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R_FAILED(Utils::OpenSdDir(AtmosphereHblWebContentDir, &d))) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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fsDirClose(&d);
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}
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/* If there's an existing filesystem, don't override. */
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/* TODO: Multiplex, overriding existing content with HBL content. */
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{
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FsFileSystem fs;
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if (R_SUCCEEDED(fsOpenFileSystemWithPatchFwd(this->forward_service.get(), &fs, title_id, static_cast<FsFileSystemType>(filesystem_type)))) {
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fsFsClose(&fs);
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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}
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return this->OpenHblWebContentFileSystem(out_fs);
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}
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Result FsMitmService::OpenFileSystemWithId(Out<std::shared_ptr<IFileSystemInterface>> out_fs, InPointer<char> path, u64 title_id, u32 filesystem_type) {
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/* Check for eligibility. */
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{
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FsDir d;
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if (!Utils::IsWebAppletTid(this->title_id) || filesystem_type != FsFileSystemType_ContentManual || !Utils::IsHblTid(title_id) ||
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R_FAILED(Utils::OpenSdDir(AtmosphereHblWebContentDir, &d))) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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fsDirClose(&d);
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}
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/* If there's an existing filesystem, don't override. */
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/* TODO: Multiplex, overriding existing content with HBL content. */
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{
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FsFileSystem fs;
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if (R_SUCCEEDED(fsOpenFileSystemWithIdFwd(this->forward_service.get(), &fs, title_id, static_cast<FsFileSystemType>(filesystem_type), path.pointer))) {
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fsFsClose(&fs);
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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}
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return this->OpenHblWebContentFileSystem(out_fs);
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}
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Result FsMitmService::OpenSdCardFileSystem(Out<std::shared_ptr<IFileSystemInterface>> out_fs) {
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/* We only care about redirecting this for NS/Emummc. */
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if (this->title_id != TitleId_Ns) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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if (!IsEmummc()) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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/* Mount the SD card. */
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FsFileSystem sd_fs;
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R_TRY(fsMountSdcard(&sd_fs));
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/* Set output filesystem. */
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std::unique_ptr<IFileSystem> redir_fs = std::make_unique<DirectoryRedirectionFileSystem>(new ProxyFileSystem(sd_fs), "/Nintendo", GetEmummcNintendoDirPath());
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out_fs.SetValue(std::make_shared<IFileSystemInterface>(std::move(redir_fs)));
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if (out_fs.IsDomain()) {
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out_fs.ChangeObjectId(sd_fs.s.object_id);
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}
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return ResultSuccess;
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}
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Result FsMitmService::OpenSaveDataFileSystem(Out<std::shared_ptr<IFileSystemInterface>> out_fs, u8 space_id, FsSave save_struct) {
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bool should_redirect_saves = false;
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const bool has_redirect_save_flags = Utils::HasFlag(this->title_id, "redirect_save");
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if (R_FAILED(Utils::GetSettingsItemBooleanValue("atmosphere", "fsmitm_redirect_saves_to_sd", &should_redirect_saves))) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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/* For now, until we're sure this is robust, only intercept normal savedata , check if flag exist*/
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if (!has_redirect_save_flags || !should_redirect_saves || save_struct.SaveDataType != FsSaveDataType_SaveData) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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/* Verify we can open the save. */
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FsFileSystem save_fs;
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if (R_FAILED(fsOpenSaveDataFileSystemFwd(this->forward_service.get(), &save_fs, space_id, &save_struct))) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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std::unique_ptr<IFileSystem> save_ifs = std::make_unique<ProxyFileSystem>(save_fs);
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{
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/* Mount the SD card using fs.mitm's session. */
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FsFileSystem sd_fs;
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R_TRY(fsMountSdcard(&sd_fs));
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std::shared_ptr<IFileSystem> sd_ifs = std::make_shared<ProxyFileSystem>(sd_fs);
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/* Verify that we can open the save directory, and that it exists. */
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const u64 target_tid = save_struct.titleID == 0 ? this->title_id : save_struct.titleID;
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FsPath save_dir_path;
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R_TRY(FsSaveUtils::GetSaveDataDirectoryPath(save_dir_path, space_id, save_struct.SaveDataType, target_tid, save_struct.userID, save_struct.saveID));
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/* Check if this is the first time we're making the save. */
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bool is_new_save = false;
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{
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DirectoryEntryType ent;
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if (sd_ifs->GetEntryType(&ent, save_dir_path) == ResultFsPathNotFound) {
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is_new_save = true;
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}
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}
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/* Ensure the directory exists. */
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R_TRY(FsDirUtils::EnsureDirectoryExists(sd_ifs.get(), save_dir_path));
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std::shared_ptr<DirectorySaveDataFileSystem> dirsave_ifs = std::make_shared<DirectorySaveDataFileSystem>(new SubDirectoryFileSystem(sd_ifs, save_dir_path.str), std::move(save_ifs));
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/* If it's the first time we're making the save, copy existing savedata over. */
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if (is_new_save) {
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/* TODO: Check error? */
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dirsave_ifs->CopySaveFromProxy();
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}
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out_fs.SetValue(std::make_shared<IFileSystemInterface>(static_cast<std::shared_ptr<IFileSystem>>(dirsave_ifs)));
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if (out_fs.IsDomain()) {
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out_fs.ChangeObjectId(sd_fs.s.object_id);
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}
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return ResultSuccess;
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}
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}
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/* Gate access to the BIS partitions. */
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Result FsMitmService::OpenBisStorage(Out<std::shared_ptr<IStorageInterface>> out_storage, u32 _bis_partition_id) {
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const FsBisStorageId bis_partition_id = static_cast<FsBisStorageId>(_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 bool is_sysmodule = TitleIdIsSystem(this->title_id);
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const bool has_bis_write_flag = Utils::HasFlag(this->title_id, "bis_write");
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const bool has_cal0_read_flag = Utils::HasFlag(this->title_id, "cal_read");
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/* Set output storage. */
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if (bis_partition_id == FsBisStorageId_Boot0) {
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out_storage.SetValue(std::make_shared<IStorageInterface>(new Boot0Storage(bis_storage, this->title_id)));
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} else if (bis_partition_id == FsBisStorageId_CalibrationBinary) {
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/* PRODINFO should *never* be writable. */
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if (is_sysmodule || has_cal0_read_flag) {
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out_storage.SetValue(std::make_shared<IStorageInterface>(new ReadOnlyStorageAdapter(new ProxyStorage(bis_storage))));
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} else {
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/* Do not allow non-sysmodules to read *or* write CAL0. */
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fsStorageClose(&bis_storage);
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return ResultFsPermissionDenied;
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}
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} else {
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if (is_sysmodule || has_bis_write_flag) {
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/* Sysmodules should still be allowed to read and write. */
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out_storage.SetValue(std::make_shared<IStorageInterface>(new ProxyStorage(bis_storage)));
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} else if (Utils::IsHblTid(this->title_id) &&
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((FsBisStorageId_BootConfigAndPackage2NormalMain <= bis_partition_id && bis_partition_id <= FsBisStorageId_BootConfigAndPackage2RepairSub) ||
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bis_partition_id == FsBisStorageId_Boot1)) {
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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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out_storage.SetValue(std::make_shared<IStorageInterface>(new ProxyStorage(bis_storage)));
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} else {
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/* Non-sysmodules should be allowed to read. */
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out_storage.SetValue(std::make_shared<IStorageInterface>(new ReadOnlyStorageAdapter(new ProxyStorage(bis_storage))));
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}
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}
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/* Copy domain id. */
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if (out_storage.IsDomain()) {
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out_storage.ChangeObjectId(bis_storage.s.object_id);
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}
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return ResultSuccess;
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}
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/* Add redirection for RomFS to the SD card. */
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Result FsMitmService::OpenDataStorageByCurrentProcess(Out<std::shared_ptr<IStorageInterface>> out_storage) {
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if (!this->should_override_contents) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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/* If we don't have anything to modify, there's no sense in maintaining a copy of the metadata tables. */
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if (!Utils::HasSdRomfsContent(this->title_id)) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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/* Try to get from the cache. */
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{
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std::shared_ptr<IStorageInterface> cached_storage = nullptr;
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bool has_cache = StorageCacheGetEntry(this->title_id, &cached_storage);
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if (has_cache) {
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if (out_storage.IsDomain()) {
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/* TODO: Don't leak object id? */
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FsStorage s = {0};
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R_TRY(fsOpenDataStorageByCurrentProcessFwd(this->forward_service.get(), &s));
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out_storage.ChangeObjectId(s.s.object_id);
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}
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out_storage.SetValue(std::move(cached_storage));
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return ResultSuccess;
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}
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}
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/* Try to open 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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/* Make new layered romfs, cacheing to storage. */
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{
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std::shared_ptr<IStorageInterface> storage_to_cache = nullptr;
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/* TODO: Is there a sensible path that ends in ".romfs" we can use?" */
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FsFile data_file;
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if (R_SUCCEEDED(Utils::OpenSdFileForAtmosphere(this->title_id, "romfs.bin", FS_OPEN_READ, &data_file))) {
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storage_to_cache = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<ReadOnlyStorageAdapter>(new ProxyStorage(data_storage)), std::make_shared<ReadOnlyStorageAdapter>(new FileStorage(new ProxyFile(data_file))), this->title_id));
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} else {
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storage_to_cache = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<ReadOnlyStorageAdapter>(new ProxyStorage(data_storage)), nullptr, this->title_id));
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}
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StorageCacheSetEntry(this->title_id, &storage_to_cache);
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out_storage.SetValue(std::move(storage_to_cache));
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if (out_storage.IsDomain()) {
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out_storage.ChangeObjectId(data_storage.s.object_id);
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}
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}
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return ResultSuccess;
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}
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/* Add redirection for System Data Archives to the SD card. */
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Result FsMitmService::OpenDataStorageByDataId(Out<std::shared_ptr<IStorageInterface>> out_storage, u64 data_id, u8 sid) {
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if (!this->should_override_contents) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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/* If we don't have anything to modify, there's no sense in maintaining a copy of the metadata tables. */
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if (!Utils::HasSdRomfsContent(data_id)) {
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return ResultAtmosphereMitmShouldForwardToSession;
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}
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FsStorageId storage_id = static_cast<FsStorageId>(sid);
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/* Try to get from the cache. */
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{
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std::shared_ptr<IStorageInterface> cached_storage = nullptr;
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bool has_cache = StorageCacheGetEntry(data_id, &cached_storage);
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if (has_cache) {
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if (out_storage.IsDomain()) {
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/* TODO: Don't leak object id? */
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FsStorage s = {0};
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R_TRY(fsOpenDataStorageByDataIdFwd(this->forward_service.get(), storage_id, data_id, &s));
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out_storage.ChangeObjectId(s.s.object_id);
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}
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out_storage.SetValue(std::move(cached_storage));
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return ResultSuccess;
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}
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}
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/* Try to open data storage. */
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FsStorage data_storage;
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R_TRY(fsOpenDataStorageByDataIdFwd(this->forward_service.get(), storage_id, data_id, &data_storage));
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/* Make new layered romfs, cacheing to storage. */
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{
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std::shared_ptr<IStorageInterface> storage_to_cache = nullptr;
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/* TODO: Is there a sensible path that ends in ".romfs" we can use?" */
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FsFile data_file;
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if (R_SUCCEEDED(Utils::OpenSdFileForAtmosphere(data_id, "romfs.bin", FS_OPEN_READ, &data_file))) {
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storage_to_cache = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<ReadOnlyStorageAdapter>(new ProxyStorage(data_storage)), std::make_shared<ReadOnlyStorageAdapter>(new FileStorage(new ProxyFile(data_file))), data_id));
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} else {
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storage_to_cache = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<ReadOnlyStorageAdapter>(new ProxyStorage(data_storage)), nullptr, data_id));
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}
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StorageCacheSetEntry(data_id, &storage_to_cache);
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out_storage.SetValue(std::move(storage_to_cache));
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if (out_storage.IsDomain()) {
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out_storage.ChangeObjectId(data_storage.s.object_id);
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}
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}
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return ResultSuccess;
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}
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