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Atmosphere/stratosphere/ams_mitm/source/fs_mitm/fsmitm_service.cpp
Michael Scire 0dcb496522 Fix emummc nintendo dir redirection
2019-06-14 21:20:53 -07:00

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/*
* Copyright (c) 2018-2019 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 <map>
#include <memory>
#include <mutex>
#include <switch.h>
#include <stratosphere.hpp>
#include "fsmitm_service.hpp"
#include "fs_shim.h"
#include "../utils.hpp"
#include "fsmitm_boot0storage.hpp"
#include "fsmitm_layeredrom.hpp"
#include "fs_dir_utils.hpp"
#include "fs_save_utils.hpp"
#include "fs_file_storage.hpp"
#include "fs_subdirectory_filesystem.hpp"
#include "fs_directory_redirection_filesystem.hpp"
#include "fs_directory_savedata_filesystem.hpp"
#include "../debug.hpp"
static HosMutex g_StorageCacheLock;
static std::unordered_map<u64, std::weak_ptr<IStorageInterface>> g_StorageCache;
static bool StorageCacheGetEntry(u64 title_id, std::shared_ptr<IStorageInterface> *out) {
std::scoped_lock<HosMutex> lock(g_StorageCacheLock);
if (g_StorageCache.find(title_id) == g_StorageCache.end()) {
return false;
}
auto intf = g_StorageCache[title_id].lock();
if (intf != nullptr) {
*out = intf;
return true;
}
return false;
}
static void StorageCacheSetEntry(u64 title_id, std::shared_ptr<IStorageInterface> *ptr) {
std::scoped_lock<HosMutex> lock(g_StorageCacheLock);
/* Ensure we always use the cached copy if present. */
if (g_StorageCache.find(title_id) != g_StorageCache.end()) {
auto intf = g_StorageCache[title_id].lock();
if (intf != nullptr) {
*ptr = intf;
}
}
g_StorageCache[title_id] = *ptr;
}
void FsMitmService::PostProcess(IMitmServiceObject *obj, IpcResponseContext *ctx) {
auto this_ptr = static_cast<FsMitmService *>(obj);
switch ((FspSrvCmd)ctx->cmd_id) {
case FspSrvCmd_SetCurrentProcess:
if (R_SUCCEEDED(ctx->rc)) {
this_ptr->has_initialized = true;
this_ptr->process_id = ctx->request.Pid;
this_ptr->title_id = this_ptr->process_id;
if (R_FAILED(MitmQueryUtils::GetAssociatedTidForPid(this_ptr->process_id, &this_ptr->title_id))) {
/* Log here, if desired. */
}
break;
}
break;
default:
break;
}
}
Result FsMitmService::OpenHblWebContentFileSystem(Out<std::shared_ptr<IFileSystemInterface>> &out_fs) {
std::shared_ptr<IFileSystemInterface> fs = nullptr;
u32 out_domain_id = 0;
Result rc = ResultSuccess;
ON_SCOPE_EXIT {
if (R_SUCCEEDED(rc)) {
out_fs.SetValue(std::move(fs));
if (out_fs.IsDomain()) {
out_fs.ChangeObjectId(out_domain_id);
}
}
};
/* Mount the SD card using fs.mitm's session. */
FsFileSystem sd_fs;
rc = fsMountSdcard(&sd_fs);
if (R_SUCCEEDED(rc)) {
std::unique_ptr<IFileSystem> web_ifs = std::make_unique<SubDirectoryFileSystem>(std::make_shared<ProxyFileSystem>(sd_fs), AtmosphereHblWebContentDir);
fs = std::make_shared<IFileSystemInterface>(std::move(web_ifs));
if (out_fs.IsDomain()) {
out_domain_id = sd_fs.s.object_id;
}
}
return rc;
}
Result FsMitmService::OpenFileSystemWithPatch(Out<std::shared_ptr<IFileSystemInterface>> out_fs, u64 title_id, u32 filesystem_type) {
/* Check for eligibility. */
{
FsDir d;
if (!Utils::IsWebAppletTid(this->title_id) || filesystem_type != FsFileSystemType_ContentManual || !Utils::IsHblTid(title_id) ||
R_FAILED(Utils::OpenSdDir(AtmosphereHblWebContentDir, &d))) {
return ResultAtmosphereMitmShouldForwardToSession;
}
fsDirClose(&d);
}
/* If there's an existing filesystem, don't override. */
/* TODO: Multiplex, overriding existing content with HBL content. */
{
FsFileSystem fs;
if (R_SUCCEEDED(fsOpenFileSystemWithPatchFwd(this->forward_service.get(), &fs, title_id, static_cast<FsFileSystemType>(filesystem_type)))) {
fsFsClose(&fs);
return ResultAtmosphereMitmShouldForwardToSession;
}
}
return this->OpenHblWebContentFileSystem(out_fs);
}
Result FsMitmService::OpenFileSystemWithId(Out<std::shared_ptr<IFileSystemInterface>> out_fs, InPointer<char> path, u64 title_id, u32 filesystem_type) {
/* Check for eligibility. */
{
FsDir d;
if (!Utils::IsWebAppletTid(this->title_id) || filesystem_type != FsFileSystemType_ContentManual || !Utils::IsHblTid(title_id) ||
R_FAILED(Utils::OpenSdDir(AtmosphereHblWebContentDir, &d))) {
return ResultAtmosphereMitmShouldForwardToSession;
}
fsDirClose(&d);
}
/* If there's an existing filesystem, don't override. */
/* TODO: Multiplex, overriding existing content with HBL content. */
{
FsFileSystem fs;
if (R_SUCCEEDED(fsOpenFileSystemWithIdFwd(this->forward_service.get(), &fs, title_id, static_cast<FsFileSystemType>(filesystem_type), path.pointer))) {
fsFsClose(&fs);
return ResultAtmosphereMitmShouldForwardToSession;
}
}
return this->OpenHblWebContentFileSystem(out_fs);
}
Result FsMitmService::OpenSdCardFileSystem(Out<std::shared_ptr<IFileSystemInterface>> out_fs) {
/* We only care about redirecting this for NS/Emummc. */
if (this->title_id != TitleId_Ns) {
return ResultAtmosphereMitmShouldForwardToSession;
}
if (!IsEmummc()) {
return ResultAtmosphereMitmShouldForwardToSession;
}
std::shared_ptr<IFileSystemInterface> fs = nullptr;
u32 out_domain_id = 0;
Result rc = ResultSuccess;
ON_SCOPE_EXIT {
if (R_SUCCEEDED(rc)) {
out_fs.SetValue(std::move(fs));
if (out_fs.IsDomain()) {
out_fs.ChangeObjectId(out_domain_id);
}
}
};
/* Mount the SD card. */
FsFileSystem sd_fs;
if (R_FAILED((rc = fsMountSdcard(&sd_fs)))) {
return rc;
}
std::shared_ptr<IFileSystem> redir_fs = std::make_shared<DirectoryRedirectionFileSystem>(new ProxyFileSystem(sd_fs), "/Nintendo", GetEmummcNintendoDirPath());
fs = std::make_shared<IFileSystemInterface>(redir_fs);
if (out_fs.IsDomain()) {
out_domain_id = sd_fs.s.object_id;
}
return rc;
}
Result FsMitmService::OpenSaveDataFileSystem(Out<std::shared_ptr<IFileSystemInterface>> out_fs, u8 space_id, FsSave save_struct) {
bool should_redirect_saves = false;
const bool has_redirect_save_flags = Utils::HasFlag(this->title_id, "redirect_save");
if (R_FAILED(Utils::GetSettingsItemBooleanValue("atmosphere", "fsmitm_redirect_saves_to_sd", &should_redirect_saves))) {
return ResultAtmosphereMitmShouldForwardToSession;
}
/* For now, until we're sure this is robust, only intercept normal savedata , check if flag exist*/
if (!has_redirect_save_flags || !should_redirect_saves || save_struct.SaveDataType != FsSaveDataType_SaveData) {
return ResultAtmosphereMitmShouldForwardToSession;
}
/* Verify we can open the save. */
FsFileSystem save_fs;
if (R_FAILED(fsOpenSaveDataFileSystemFwd(this->forward_service.get(), &save_fs, space_id, &save_struct))) {
return ResultAtmosphereMitmShouldForwardToSession;
}
std::unique_ptr<IFileSystem> save_ifs = std::make_unique<ProxyFileSystem>(save_fs);
{
std::shared_ptr<IFileSystemInterface> fs = nullptr;
u32 out_domain_id = 0;
Result rc = ResultSuccess;
ON_SCOPE_EXIT {
if (R_SUCCEEDED(rc)) {
out_fs.SetValue(std::move(fs));
if (out_fs.IsDomain()) {
out_fs.ChangeObjectId(out_domain_id);
}
}
};
/* Mount the SD card using fs.mitm's session. */
FsFileSystem sd_fs;
if (R_FAILED((rc = fsMountSdcard(&sd_fs)))) {
return rc;
}
std::shared_ptr<IFileSystem> sd_ifs = std::make_shared<ProxyFileSystem>(sd_fs);
/* Verify that we can open the save directory, and that it exists. */
const u64 target_tid = save_struct.titleID == 0 ? this->title_id : save_struct.titleID;
FsPath save_dir_path;
if (R_FAILED((rc = FsSaveUtils::GetSaveDataDirectoryPath(save_dir_path, space_id, save_struct.SaveDataType, target_tid, save_struct.userID, save_struct.saveID)))) {
return rc;
}
/* Check if this is the first time we're making the save. */
bool is_new_save = false;
{
DirectoryEntryType ent;
if (sd_ifs->GetEntryType(&ent, save_dir_path) == ResultFsPathNotFound) {
is_new_save = true;
}
}
/* Ensure the directory exists. */
if (R_FAILED((rc = FsDirUtils::EnsureDirectoryExists(sd_ifs.get(), save_dir_path)))) {
return rc;
}
std::shared_ptr<DirectorySaveDataFileSystem> dirsave_ifs = std::make_shared<DirectorySaveDataFileSystem>(new SubDirectoryFileSystem(sd_ifs, save_dir_path.str), std::move(save_ifs));
/* If it's the first time we're making the save, copy existing savedata over. */
if (is_new_save) {
/* TODO: Check error? */
dirsave_ifs->CopySaveFromProxy();
}
fs = std::make_shared<IFileSystemInterface>(static_cast<std::shared_ptr<IFileSystem>>(dirsave_ifs));
if (out_fs.IsDomain()) {
out_domain_id = sd_fs.s.object_id;
}
return rc;
}
}
/* Gate access to the BIS partitions. */
Result FsMitmService::OpenBisStorage(Out<std::shared_ptr<IStorageInterface>> out_storage, u32 _bis_partition_id) {
std::shared_ptr<IStorageInterface> storage = nullptr;
u32 out_domain_id = 0;
Result rc = ResultSuccess;
const FsBisStorageId bis_partition_id = static_cast<FsBisStorageId>(_bis_partition_id);
ON_SCOPE_EXIT {
if (R_SUCCEEDED(rc)) {
out_storage.SetValue(std::move(storage));
if (out_storage.IsDomain()) {
out_storage.ChangeObjectId(out_domain_id);
}
}
};
{
FsStorage bis_storage;
rc = fsOpenBisStorageFwd(this->forward_service.get(), &bis_storage, bis_partition_id);
if (R_SUCCEEDED(rc)) {
const bool is_sysmodule = TitleIdIsSystem(this->title_id);
const bool has_bis_write_flag = Utils::HasFlag(this->title_id, "bis_write");
const bool has_cal0_read_flag = Utils::HasFlag(this->title_id, "cal_read");
if (bis_partition_id == FsBisStorageId_Boot0) {
storage = std::make_shared<IStorageInterface>(new Boot0Storage(bis_storage, this->title_id));
} else if (bis_partition_id == FsBisStorageId_CalibrationBinary) {
/* PRODINFO should *never* be writable. */
if (is_sysmodule || has_cal0_read_flag) {
storage = std::make_shared<IStorageInterface>(new ReadOnlyStorageAdapter(new ProxyStorage(bis_storage)));
} else {
/* Do not allow non-sysmodules to read *or* write CAL0. */
fsStorageClose(&bis_storage);
rc = ResultFsPermissionDenied;
return rc;
}
} else {
if (is_sysmodule || has_bis_write_flag) {
/* Sysmodules should still be allowed to read and write. */
storage = std::make_shared<IStorageInterface>(new ProxyStorage(bis_storage));
} else if (Utils::IsHblTid(this->title_id) &&
((FsBisStorageId_BootConfigAndPackage2NormalMain <= bis_partition_id && bis_partition_id <= FsBisStorageId_BootConfigAndPackage2RepairSub) ||
bis_partition_id == FsBisStorageId_Boot1)) {
/* 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 :/ */
storage = std::make_shared<IStorageInterface>(new ProxyStorage(bis_storage));
} else {
/* Non-sysmodules should be allowed to read. */
storage = std::make_shared<IStorageInterface>(new ReadOnlyStorageAdapter(new ProxyStorage(bis_storage)));
}
}
if (out_storage.IsDomain()) {
out_domain_id = bis_storage.s.object_id;
}
}
}
return rc;
}
/* Add redirection for RomFS to the SD card. */
Result FsMitmService::OpenDataStorageByCurrentProcess(Out<std::shared_ptr<IStorageInterface>> out_storage) {
std::shared_ptr<IStorageInterface> storage = nullptr;
u32 out_domain_id = 0;
Result rc = ResultSuccess;
if (!this->should_override_contents) {
return ResultAtmosphereMitmShouldForwardToSession;
}
bool has_cache = StorageCacheGetEntry(this->title_id, &storage);
ON_SCOPE_EXIT {
if (R_SUCCEEDED(rc)) {
if (!has_cache) {
StorageCacheSetEntry(this->title_id, &storage);
}
out_storage.SetValue(std::move(storage));
if (out_storage.IsDomain()) {
out_storage.ChangeObjectId(out_domain_id);
}
}
};
if (has_cache) {
if (out_storage.IsDomain()) {
FsStorage s = {0};
rc = fsOpenDataStorageByCurrentProcessFwd(this->forward_service.get(), &s);
if (R_SUCCEEDED(rc)) {
out_domain_id = s.s.object_id;
}
} else {
rc = ResultSuccess;
}
if (R_FAILED(rc)) {
storage.reset();
}
} else {
FsStorage data_storage;
FsFile data_file;
rc = fsOpenDataStorageByCurrentProcessFwd(this->forward_service.get(), &data_storage);
Log(armGetTls(), 0x100);
if (R_SUCCEEDED(rc)) {
if (Utils::HasSdRomfsContent(this->title_id)) {
/* TODO: Is there a sensible path that ends in ".romfs" we can use?" */
if (R_SUCCEEDED(Utils::OpenSdFileForAtmosphere(this->title_id, "romfs.bin", FS_OPEN_READ, &data_file))) {
storage = 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));
} else {
storage = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<ReadOnlyStorageAdapter>(new ProxyStorage(data_storage)), nullptr, this->title_id));
}
if (out_storage.IsDomain()) {
out_domain_id = data_storage.s.object_id;
}
} else {
/* If we don't have anything to modify, there's no sense in maintaining a copy of the metadata tables. */
fsStorageClose(&data_storage);
rc = ResultAtmosphereMitmShouldForwardToSession;
}
}
}
return rc;
}
/* Add redirection for System Data Archives to the SD card. */
Result FsMitmService::OpenDataStorageByDataId(Out<std::shared_ptr<IStorageInterface>> out_storage, u64 data_id, u8 sid) {
FsStorageId storage_id = (FsStorageId)sid;
FsStorage data_storage;
FsFile data_file;
if (!this->should_override_contents) {
return ResultAtmosphereMitmShouldForwardToSession;
}
std::shared_ptr<IStorageInterface> storage = nullptr;
u32 out_domain_id = 0;
Result rc = ResultSuccess;
bool has_cache = StorageCacheGetEntry(data_id, &storage);
ON_SCOPE_EXIT {
if (R_SUCCEEDED(rc)) {
if (!has_cache) {
StorageCacheSetEntry(data_id, &storage);
}
out_storage.SetValue(std::move(storage));
if (out_storage.IsDomain()) {
out_storage.ChangeObjectId(out_domain_id);
}
}
};
if (has_cache) {
if (out_storage.IsDomain()) {
FsStorage s = {0};
rc = fsOpenDataStorageByDataIdFwd(this->forward_service.get(), storage_id, data_id, &s);
if (R_SUCCEEDED(rc)) {
out_domain_id = s.s.object_id;
}
} else {
rc = ResultSuccess;
}
if (R_FAILED(rc)) {
storage.reset();
}
} else {
rc = fsOpenDataStorageByDataIdFwd(this->forward_service.get(), storage_id, data_id, &data_storage);
if (R_SUCCEEDED(rc)) {
if (Utils::HasSdRomfsContent(data_id)) {
/* TODO: Is there a sensible path that ends in ".romfs" we can use?" */
if (R_SUCCEEDED(Utils::OpenSdFileForAtmosphere(data_id, "romfs.bin", FS_OPEN_READ, &data_file))) {
storage = 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));
} else {
storage = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<ReadOnlyStorageAdapter>(new ProxyStorage(data_storage)), nullptr, data_id));
}
if (out_storage.IsDomain()) {
out_domain_id = data_storage.s.object_id;
}
} else {
/* If we don't have anything to modify, there's no sense in maintaining a copy of the metadata tables. */
fsStorageClose(&data_storage);
rc = ResultAtmosphereMitmShouldForwardToSession;
}
}
}
return rc;
}
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