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Implement processing save data meta files.

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J-D-K
2025-06-12 20:46:55 -04:00
parent 8dd16c12bc
commit 71b4c1fbfa
10 changed files with 142 additions and 17 deletions
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69
source/fs/SaveMetaData.cpp
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@@ -1,9 +1,28 @@
#include "fs/SaveMetaData.hpp"
#include "fs/directory_functions.hpp"
#include "fs/save_data_functions.hpp"
#include "fs/save_mount.hpp"
#include "fslib.hpp"
#include "logger.hpp"
namespace
{
/// @brief This is the string template for errors here.
constexpr std::string_view STRING_ERROR_TEMPLATE = "Error processing save meta for %016llX: %s";
} // namespace
void fs::create_save_meta_data(data::TitleInfo *titleInfo, const FsSaveDataInfo *saveInfo, fs::SaveMetaData &meta)
{
// I'm assuming this is opened and good because we're making a backup.
int64_t containerSize = 0;
if (!fslib::get_device_total_space(fs::DEFAULT_SAVE_ROOT, containerSize))
{
// Log and fall back to file size count.
logger::log("Error getting save container's total size. Defaulting to file size count.");
containerSize = fs::get_directory_total_size(fs::DEFAULT_SAVE_ROOT);
}
// Fill out the meta struct.
meta = {.m_magic = fs::SAVE_META_MAGIC,
.m_applicationID = titleInfo->get_application_id(),
.m_saveType = saveInfo->save_data_type,
@@ -13,5 +32,53 @@ void fs::create_save_meta_data(data::TitleInfo *titleInfo, const FsSaveDataInfo
.m_saveDataSizeMax = titleInfo->get_journal_size_max(saveInfo->save_data_type),
.m_journalSize = titleInfo->get_journal_size(saveInfo->save_data_type),
.m_journalSizeMax = titleInfo->get_journal_size_max(saveInfo->save_data_type),
.m_totalSaveSize = fs::get_directory_total_size(fs::DEFAULT_SAVE_ROOT)};
.m_totalSaveSize = containerSize};
}
bool fs::process_save_meta_data(const FsSaveDataInfo *saveInfo, SaveMetaData &meta)
{
if (meta.m_magic != SAVE_META_MAGIC || saveInfo->application_id != meta.m_applicationID)
{
logger::log(STRING_ERROR_TEMPLATE.data(), meta.m_applicationID, "Invalid magic or mismatched application ID.");
return false;
}
// To do: I'm assuming this function will only be called once the save container is already opened here...
int64_t totalSpace = 0;
if (!fslib::get_device_total_space(fs::DEFAULT_SAVE_ROOT, totalSpace))
{
logger::log(STRING_ERROR_TEMPLATE.data(), meta.m_applicationID, "get_device_total_space");
return false;
}
if (totalSpace >= meta.m_totalSaveSize)
{
// Gonna return true here, because there's no need to do anything to the container.
return true;
}
// First we need to temporarily close the save.
if (!fslib::close_file_system(fs::DEFAULT_SAVE_MOUNT))
{
logger::log(STRING_ERROR_TEMPLATE.data(), meta.m_applicationID, "close_file_system");
// We can't go any further at this point. You can't extend the save while it's open.
return false;
}
// This is where we finally extend the container. Using the large of the two journal sizes
if (!fs::extend_save_data(saveInfo, meta.m_totalSaveSize, meta.m_journalSizeMax))
{
logger::log(STRING_ERROR_TEMPLATE.data(), meta.m_applicationID, "Error extending save data container.");
return false;
}
// If this fails, we're super screwed.
if (!fslib::open_save_data_with_save_info(fs::DEFAULT_SAVE_MOUNT, *saveInfo))
{
logger::log(STRING_ERROR_TEMPLATE.data(), meta.m_applicationID, "open_save_data");
return false;
}
// More later if needed.
return true;
}