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Atmosphere/stratosphere/fs_mitm/source/fsmitm_service.cpp

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/*
* Copyright (c) 2018 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 <switch.h>
#include "fsmitm_service.hpp"
#include "fs_shim.h"
#include "fsmitm_utils.hpp"
#include "fsmitm_romstorage.hpp"
#include "fsmitm_layeredrom.hpp"
#include "debug.hpp"
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;
}
}
/* 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 = 0;
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ON_SCOPE_EXIT {
if (R_SUCCEEDED(rc)) {
out_storage.SetValue(std::move(storage));
if (out_storage.IsDomain()) {
out_storage.ChangeObjectId(out_domain_id);
}
}
};
if (this->romfs_storage != nullptr) {
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 = 0;
}
if (R_SUCCEEDED(rc)) {
storage = this->romfs_storage;
}
} 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<RomInterfaceStorage>(data_storage), std::make_shared<RomFileStorage>(data_file), this->title_id));
} else {
storage = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<RomInterfaceStorage>(data_storage), nullptr, this->title_id));
}
this->romfs_storage = storage;
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 = RESULT_FORWARD_TO_SESSION;
}
}
}
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;
std::shared_ptr<IStorageInterface> storage = nullptr;
u32 out_domain_id = 0;
Result rc = 0;
ON_SCOPE_EXIT {
if (R_SUCCEEDED(rc)) {
out_storage.SetValue(std::move(storage));
if (out_storage.IsDomain()) {
out_storage.ChangeObjectId(out_domain_id);
}
}
};
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<RomInterfaceStorage>(data_storage), std::make_shared<RomFileStorage>(data_file), data_id));
} else {
storage = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<RomInterfaceStorage>(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 = RESULT_FORWARD_TO_SESSION;
}
}
return rc;
}