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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "core/file_sys/fssystem/fssystem_hierarchical_integrity_verification_storage.h"
#include "core/file_sys/vfs_offset.h"
namespace FileSys {
HierarchicalIntegrityVerificationStorage::HierarchicalIntegrityVerificationStorage()
: m_data_size(-1) {
for (size_t i = 0; i < MaxLayers - 1; i++) {
m_verify_storages[i] = std::make_shared<IntegrityVerificationStorage>();
}
}
Result HierarchicalIntegrityVerificationStorage::Initialize(
const HierarchicalIntegrityVerificationInformation& info,
HierarchicalStorageInformation storage, int max_data_cache_entries, int max_hash_cache_entries,
s8 buffer_level) {
// Validate preconditions.
ASSERT(IntegrityMinLayerCount <= info.max_layers && info.max_layers <= IntegrityMaxLayerCount);
// Set member variables.
m_max_layers = info.max_layers;
// Initialize the top level verification storage.
m_verify_storages[0]->Initialize(storage[HierarchicalStorageInformation::MasterStorage],
storage[HierarchicalStorageInformation::Layer1Storage],
static_cast<s64>(1) << info.info[0].block_order, HashSize,
false);
// Ensure we don't leak state if further initialization goes wrong.
ON_RESULT_FAILURE {
m_verify_storages[0]->Finalize();
m_data_size = -1;
};
// Initialize the top level buffer storage.
m_buffer_storages[0] = m_verify_storages[0];
R_UNLESS(m_buffer_storages[0] != nullptr, ResultAllocationMemoryFailedAllocateShared);
// Prepare to initialize the level storages.
s32 level = 0;
// Ensure we don't leak state if further initialization goes wrong.
ON_RESULT_FAILURE_2 {
m_verify_storages[level + 1]->Finalize();
for (; level > 0; --level) {
m_buffer_storages[level].reset();
m_verify_storages[level]->Finalize();
}
};
// Initialize the level storages.
for (; level < m_max_layers - 3; ++level) {
// Initialize the verification storage.
auto buffer_storage =
std::make_shared<OffsetVfsFile>(m_buffer_storages[level], info.info[level].size, 0);
m_verify_storages[level + 1]->Initialize(
std::move(buffer_storage), storage[level + 2],
static_cast<s64>(1) << info.info[level + 1].block_order,
static_cast<s64>(1) << info.info[level].block_order, false);
// Initialize the buffer storage.
m_buffer_storages[level + 1] = m_verify_storages[level + 1];
R_UNLESS(m_buffer_storages[level + 1] != nullptr,
ResultAllocationMemoryFailedAllocateShared);
}
// Initialize the final level storage.
{
// Initialize the verification storage.
auto buffer_storage =
std::make_shared<OffsetVfsFile>(m_buffer_storages[level], info.info[level].size, 0);
m_verify_storages[level + 1]->Initialize(
std::move(buffer_storage), storage[level + 2],
static_cast<s64>(1) << info.info[level + 1].block_order,
static_cast<s64>(1) << info.info[level].block_order, true);
// Initialize the buffer storage.
m_buffer_storages[level + 1] = m_verify_storages[level + 1];
R_UNLESS(m_buffer_storages[level + 1] != nullptr,
ResultAllocationMemoryFailedAllocateShared);
}
// Set the data size.
m_data_size = info.info[level + 1].size;
// We succeeded.
R_SUCCEED();
}
void HierarchicalIntegrityVerificationStorage::Finalize() {
if (m_data_size >= 0) {
m_data_size = 0;
for (s32 level = m_max_layers - 2; level >= 0; --level) {
m_buffer_storages[level].reset();
m_verify_storages[level]->Finalize();
}
m_data_size = -1;
}
}
size_t HierarchicalIntegrityVerificationStorage::Read(u8* buffer, size_t size,
size_t offset) const {
// Validate preconditions.
ASSERT(m_data_size >= 0);
// Succeed if zero-size.
if (size == 0) {
return size;
}
// Validate arguments.
ASSERT(buffer != nullptr);
// Read the data.
return m_buffer_storages[m_max_layers - 2]->Read(buffer, size, offset);
}
size_t HierarchicalIntegrityVerificationStorage::GetSize() const {
return m_data_size;
}
} // namespace FileSys
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