mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-06 12:11:43 +00:00
3a1ccdd919
* ams: update to build with gcc10/c++20 * remove mno-outline-atomics * ams: take care of most TODO C++20s * fusee/sept: update for gcc10 * whoosh, your code now uses pre-compiled headers * make: dependency fixes
664 lines
31 KiB
C++
664 lines
31 KiB
C++
/*
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* Copyright (c) 2018-2020 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 <stratosphere.hpp>
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#include "../amsmitm_fs_utils.hpp"
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#include "fsmitm_romfs.hpp"
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namespace ams::mitm::fs {
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using namespace ams::fs;
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namespace romfs {
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namespace {
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constexpr u32 EmptyEntry = 0xFFFFFFFF;
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constexpr size_t FilePartitionOffset = 0x200;
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struct Header {
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s64 header_size;
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s64 dir_hash_table_ofs;
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s64 dir_hash_table_size;
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s64 dir_table_ofs;
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s64 dir_table_size;
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s64 file_hash_table_ofs;
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s64 file_hash_table_size;
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s64 file_table_ofs;
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s64 file_table_size;
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s64 file_partition_ofs;
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};
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static_assert(util::is_pod<Header>::value && sizeof(Header) == 0x50);
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struct DirectoryEntry {
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u32 parent;
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u32 sibling;
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u32 child;
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u32 file;
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u32 hash;
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u32 name_size;
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char name[];
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};
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static_assert(util::is_pod<DirectoryEntry>::value && sizeof(DirectoryEntry) == 0x18);
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struct FileEntry {
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u32 parent;
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u32 sibling;
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s64 offset;
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s64 size;
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u32 hash;
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u32 name_size;
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char name[];
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};
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static_assert(util::is_pod<FileEntry>::value && sizeof(FileEntry) == 0x20);
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template<typename Entry>
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class TableReader {
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NON_COPYABLE(TableReader);
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NON_MOVEABLE(TableReader);
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private:
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static constexpr size_t MaxCachedSize = (1_MB / 4);
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static constexpr size_t FallbackCacheSize = 1_KB;
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private:
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ams::fs::IStorage *storage;
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size_t offset;
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size_t size;
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size_t cache_idx;
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void *cache;
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u8 fallback_cache[FallbackCacheSize];
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private:
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ALWAYS_INLINE void Read(size_t ofs, void *dst, size_t size) {
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R_ABORT_UNLESS(this->storage->Read(this->offset + ofs, dst, size));
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}
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ALWAYS_INLINE void ReloadCacheImpl(size_t idx) {
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const size_t rel_ofs = idx * MaxCachedSize;
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AMS_ABORT_UNLESS(rel_ofs < this->size);
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const size_t new_cache_size = std::min(this->size - rel_ofs, MaxCachedSize);
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this->Read(rel_ofs, this->cache, new_cache_size);
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this->cache_idx = idx;
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}
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ALWAYS_INLINE void ReloadCache(size_t idx) {
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if (this->cache_idx != idx) {
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this->ReloadCacheImpl(idx);
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}
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}
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ALWAYS_INLINE size_t GetCacheIndex(u32 ofs) {
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return ofs / MaxCachedSize;
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}
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public:
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TableReader(ams::fs::IStorage *s, size_t ofs, size_t sz) : storage(s), offset(ofs), size(sz), cache_idx(0) {
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this->cache = std::malloc(std::min(sz, MaxCachedSize));
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AMS_ABORT_UNLESS(this->cache != nullptr);
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this->ReloadCacheImpl(0);
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}
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~TableReader() {
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std::free(this->cache);
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}
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const Entry *GetEntry(u32 entry_offset) {
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this->ReloadCache(this->GetCacheIndex(entry_offset));
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const size_t ofs = entry_offset % MaxCachedSize;
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const Entry *entry = reinterpret_cast<const Entry *>(reinterpret_cast<uintptr_t>(this->cache) + ofs);
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if (AMS_UNLIKELY(this->GetCacheIndex(entry_offset) != this->GetCacheIndex(entry_offset + sizeof(Entry) + entry->name_size + sizeof(u32)))) {
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this->Read(entry_offset, this->fallback_cache, std::min(this->size - entry_offset, FallbackCacheSize));
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entry = reinterpret_cast<const Entry *>(this->fallback_cache);
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}
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return entry;
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}
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};
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template<typename Entry>
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class TableWriter {
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NON_COPYABLE(TableWriter);
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NON_MOVEABLE(TableWriter);
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private:
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static constexpr size_t MaxCachedSize = (1_MB / 4);
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static constexpr size_t FallbackCacheSize = 1_KB;
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private:
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::FsFile *file;
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size_t offset;
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size_t size;
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size_t cache_idx;
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void *cache;
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u8 fallback_cache[FallbackCacheSize];
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size_t fallback_cache_entry_offset;
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size_t fallback_cache_entry_size;
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bool cache_dirty;
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bool fallback_cache_dirty;
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private:
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ALWAYS_INLINE void Read(size_t ofs, void *dst, size_t sz) {
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u64 read_size;
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R_ABORT_UNLESS(fsFileRead(this->file, this->offset + ofs, dst, sz, 0, &read_size));
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AMS_ABORT_UNLESS(read_size == sz);
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}
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ALWAYS_INLINE void Write(size_t ofs, const void *src, size_t sz) {
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R_ABORT_UNLESS(fsFileWrite(this->file, this->offset + ofs, src, sz, FsWriteOption_None));
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}
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ALWAYS_INLINE void Flush() {
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AMS_ABORT_UNLESS(!(this->cache_dirty && this->fallback_cache_dirty));
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if (this->cache_dirty) {
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const size_t ofs = this->cache_idx * MaxCachedSize;
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this->Write(ofs, this->cache, std::min(this->size - ofs, MaxCachedSize));
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this->cache_dirty = false;
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}
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if (this->fallback_cache_dirty) {
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this->Write(this->fallback_cache_entry_offset, this->fallback_cache, this->fallback_cache_entry_size);
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this->fallback_cache_dirty = false;
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}
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}
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ALWAYS_INLINE size_t GetCacheIndex(u32 ofs) {
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return ofs / MaxCachedSize;
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}
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ALWAYS_INLINE void RefreshCacheImpl() {
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const size_t cur_cache = this->cache_idx * MaxCachedSize;
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this->Read(cur_cache, this->cache, std::min(this->size - cur_cache, MaxCachedSize));
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}
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ALWAYS_INLINE void RefreshCache(u32 entry_offset) {
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if (size_t idx = this->GetCacheIndex(entry_offset); idx != this->cache_idx || this->fallback_cache_dirty) {
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this->Flush();
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this->cache_idx = idx;
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this->RefreshCacheImpl();
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}
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}
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public:
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TableWriter(::FsFile *f, size_t ofs, size_t sz) : file(f), offset(ofs), size(sz), cache_idx(0), fallback_cache_entry_offset(), fallback_cache_entry_size(), cache_dirty(), fallback_cache_dirty() {
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const size_t cache_size = std::min(sz, MaxCachedSize);
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this->cache = std::malloc(cache_size);
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AMS_ABORT_UNLESS(this->cache != nullptr);
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std::memset(this->cache, 0, cache_size);
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std::memset(this->fallback_cache, 0, sizeof(this->fallback_cache));
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for (size_t cur = 0; cur < this->size; cur += MaxCachedSize) {
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this->Write(cur, this->cache, std::min(this->size - cur, MaxCachedSize));
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}
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}
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~TableWriter() {
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this->Flush();
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}
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Entry *GetEntry(u32 entry_offset, u32 name_len) {
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this->RefreshCache(entry_offset);
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const size_t ofs = entry_offset % MaxCachedSize;
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Entry *entry = reinterpret_cast<Entry *>(reinterpret_cast<uintptr_t>(this->cache) + ofs);
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if (ofs + sizeof(Entry) + util::AlignUp(name_len, sizeof(u32)) > MaxCachedSize) {
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this->Flush();
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this->fallback_cache_entry_offset = entry_offset;
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this->fallback_cache_entry_size = sizeof(Entry) + util::AlignUp(name_len, sizeof(u32));
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this->Read(this->fallback_cache_entry_offset, this->fallback_cache, this->fallback_cache_entry_size);
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entry = reinterpret_cast<Entry *>(this->fallback_cache);
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this->fallback_cache_dirty = true;
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} else {
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this->cache_dirty = true;
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}
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return entry;
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}
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};
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using DirectoryTableWriter = TableWriter<DirectoryEntry>;
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using FileTableWriter = TableWriter<FileEntry>;
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constexpr inline u32 CalculatePathHash(u32 parent, const char *_path, u32 start, size_t path_len) {
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const unsigned char *path = reinterpret_cast<const unsigned char *>(_path);
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u32 hash = parent ^ 123456789;
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for (size_t i = 0; i < path_len; i++) {
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hash = (hash >> 5) | (hash << 27);
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hash ^= path[start + i];
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}
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return hash;
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}
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constexpr inline size_t GetHashTableSize(size_t num_entries) {
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if (num_entries < 3) {
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return 3;
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} else if (num_entries < 19) {
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return num_entries | 1;
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} else {
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size_t count = num_entries;
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while ((count % 2 == 0) ||
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(count % 3 == 0) ||
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(count % 5 == 0) ||
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(count % 7 == 0) ||
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(count % 11 == 0) ||
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(count % 13 == 0) ||
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(count % 17 == 0))
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{
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count++;
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}
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return count;
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}
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}
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os::Mutex g_fs_romfs_path_lock(false);
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char g_fs_romfs_path_buffer[fs::EntryNameLengthMax + 1];
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NOINLINE void OpenFileSystemRomfsDirectory(FsDir *out, ncm::ProgramId program_id, BuildDirectoryContext *parent, fs::OpenDirectoryMode mode, FsFileSystem *fs) {
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std::scoped_lock lk(g_fs_romfs_path_lock);
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parent->GetPath(g_fs_romfs_path_buffer);
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R_ABORT_UNLESS(mitm::fs::OpenAtmosphereRomfsDirectory(out, program_id, g_fs_romfs_path_buffer, mode, fs));
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}
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}
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Builder::Builder(ncm::ProgramId pr_id) : program_id(pr_id), num_dirs(0), num_files(0), dir_table_size(0), file_table_size(0), dir_hash_table_size(0), file_hash_table_size(0), file_partition_size(0) {
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auto res = this->directories.emplace(std::make_unique<BuildDirectoryContext>(BuildDirectoryContext::RootTag{}));
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AMS_ABORT_UNLESS(res.second);
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this->root = res.first->get();
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this->num_dirs = 1;
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this->dir_table_size = 0x18;
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}
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void Builder::AddDirectory(BuildDirectoryContext **out, BuildDirectoryContext *parent_ctx, std::unique_ptr<BuildDirectoryContext> child_ctx) {
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/* Set parent context member. */
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child_ctx->parent = parent_ctx;
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/* Check if the directory already exists. */
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auto existing = this->directories.find(child_ctx);
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if (existing != this->directories.end()) {
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*out = existing->get();
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return;
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}
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/* Add a new directory. */
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this->num_dirs++;
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this->dir_table_size += sizeof(DirectoryEntry) + util::AlignUp(child_ctx->path_len, 4);
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*out = child_ctx.get();
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this->directories.emplace(std::move(child_ctx));
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}
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void Builder::AddFile(BuildDirectoryContext *parent_ctx, std::unique_ptr<BuildFileContext> file_ctx) {
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/* Set parent context member. */
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file_ctx->parent = parent_ctx;
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/* Check if the file already exists. */
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if (this->files.find(file_ctx) != this->files.end()) {
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return;
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}
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/* Add a new file. */
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this->num_files++;
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this->file_table_size += sizeof(FileEntry) + util::AlignUp(file_ctx->path_len, 4);
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this->files.emplace(std::move(file_ctx));
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}
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void Builder::VisitDirectory(FsFileSystem *fs, BuildDirectoryContext *parent) {
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FsDir dir;
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/* Get number of child directories. */
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s64 num_child_dirs = 0;
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{
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OpenFileSystemRomfsDirectory(&dir, this->program_id, parent, OpenDirectoryMode_Directory, fs);
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ON_SCOPE_EXIT { fsDirClose(&dir); };
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R_ABORT_UNLESS(fsDirGetEntryCount(&dir, &num_child_dirs));
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}
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AMS_ABORT_UNLESS(num_child_dirs >= 0);
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{
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BuildDirectoryContext **child_dirs = reinterpret_cast<BuildDirectoryContext **>(std::malloc(sizeof(BuildDirectoryContext *) * num_child_dirs));
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ON_SCOPE_EXIT { std::free(child_dirs); };
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AMS_ABORT_UNLESS(child_dirs != nullptr);
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s64 cur_child_dir_ind = 0;
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{
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OpenFileSystemRomfsDirectory(&dir, this->program_id, parent, OpenDirectoryMode_All, fs);
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ON_SCOPE_EXIT { fsDirClose(&dir); };
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s64 read_entries = 0;
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while (true) {
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R_ABORT_UNLESS(fsDirRead(&dir, &read_entries, 1, &this->dir_entry));
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if (read_entries != 1) {
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break;
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}
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AMS_ABORT_UNLESS(this->dir_entry.type == FsDirEntryType_Dir || this->dir_entry.type == FsDirEntryType_File);
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if (this->dir_entry.type == FsDirEntryType_Dir) {
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BuildDirectoryContext *real_child = nullptr;
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this->AddDirectory(&real_child, parent, std::make_unique<BuildDirectoryContext>(this->dir_entry.name, strlen(this->dir_entry.name)));
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AMS_ABORT_UNLESS(real_child != nullptr);
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child_dirs[cur_child_dir_ind++] = real_child;
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AMS_ABORT_UNLESS(cur_child_dir_ind <= num_child_dirs);
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} else /* if (this->dir_entry.type == FsDirEntryType_File) */ {
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this->AddFile(parent, std::make_unique<BuildFileContext>(this->dir_entry.name, strlen(this->dir_entry.name), this->dir_entry.file_size, 0, this->cur_source_type));
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}
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}
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}
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AMS_ABORT_UNLESS(num_child_dirs == cur_child_dir_ind);
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for (s64 i = 0; i < num_child_dirs; i++) {
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this->VisitDirectory(fs, child_dirs[i]);
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}
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}
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}
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class DirectoryTableReader : public TableReader<DirectoryEntry> {
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public:
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DirectoryTableReader(ams::fs::IStorage *s, size_t ofs, size_t sz) : TableReader(s, ofs, sz) { /* ... */ }
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};
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class FileTableReader : public TableReader<FileEntry> {
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public:
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FileTableReader(ams::fs::IStorage *s, size_t ofs, size_t sz) : TableReader(s, ofs, sz) { /* ... */ }
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};
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void Builder::VisitDirectory(BuildDirectoryContext *parent, u32 parent_offset, DirectoryTableReader &dir_table, FileTableReader &file_table) {
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const DirectoryEntry *parent_entry = dir_table.GetEntry(parent_offset);
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u32 cur_file_offset = parent_entry->file;
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while (cur_file_offset != EmptyEntry) {
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const FileEntry *cur_file = file_table.GetEntry(cur_file_offset);
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this->AddFile(parent, std::make_unique<BuildFileContext>(cur_file->name, cur_file->name_size, cur_file->size, cur_file->offset, this->cur_source_type));
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cur_file_offset = cur_file->sibling;
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}
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u32 cur_child_offset = parent_entry->child;
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while (cur_child_offset != EmptyEntry) {
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BuildDirectoryContext *real_child = nullptr;
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u32 next_child_offset = 0;
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{
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const DirectoryEntry *cur_child = dir_table.GetEntry(cur_child_offset);
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this->AddDirectory(&real_child, parent, std::make_unique<BuildDirectoryContext>(cur_child->name, cur_child->name_size));
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AMS_ABORT_UNLESS(real_child != nullptr);
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next_child_offset = cur_child->sibling;
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__asm__ __volatile__("" ::: "memory");
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}
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this->VisitDirectory(real_child, cur_child_offset, dir_table, file_table);
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cur_child_offset = next_child_offset;
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}
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}
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void Builder::AddSdFiles() {
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/* Open Sd Card filesystem. */
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FsFileSystem sd_filesystem;
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R_ABORT_UNLESS(fsOpenSdCardFileSystem(&sd_filesystem));
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ON_SCOPE_EXIT { fsFsClose(&sd_filesystem); };
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/* If there is no romfs folder on the SD, don't bother continuing. */
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{
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FsDir dir;
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if (R_FAILED(mitm::fs::OpenAtmosphereRomfsDirectory(&dir, this->program_id, this->root->path.get(), OpenDirectoryMode_Directory, &sd_filesystem))) {
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return;
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}
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fsDirClose(&dir);
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}
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this->cur_source_type = DataSourceType::LooseSdFile;
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this->VisitDirectory(&sd_filesystem, this->root);
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}
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void Builder::AddStorageFiles(ams::fs::IStorage *storage, DataSourceType source_type) {
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Header header;
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R_ABORT_UNLESS(storage->Read(0, &header, sizeof(Header)));
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AMS_ABORT_UNLESS(header.header_size == sizeof(Header));
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/* Read tables. */
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DirectoryTableReader dir_table(storage, header.dir_table_ofs, header.dir_table_size);
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FileTableReader file_table(storage, header.file_table_ofs, header.file_table_size);
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this->cur_source_type = source_type;
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this->VisitDirectory(this->root, 0x0, dir_table, file_table);
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}
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void Builder::Build(std::vector<SourceInfo> *out_infos) {
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/* Clear output. */
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out_infos->clear();
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/* Open an SD card filesystem. */
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FsFileSystem sd_filesystem;
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R_ABORT_UNLESS(fsOpenSdCardFileSystem(&sd_filesystem));
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ON_SCOPE_EXIT { fsFsClose(&sd_filesystem); };
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/* Calculate hash table sizes. */
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const size_t num_dir_hash_table_entries = GetHashTableSize(this->num_dirs);
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const size_t num_file_hash_table_entries = GetHashTableSize(this->num_files);
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this->dir_hash_table_size = sizeof(u32) * num_dir_hash_table_entries;
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this->file_hash_table_size = sizeof(u32) * num_file_hash_table_entries;
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|
|
/* Allocate metadata, make pointers. */
|
|
Header *header = reinterpret_cast<Header *>(std::malloc(sizeof(Header)));
|
|
std::memset(header, 0x00, sizeof(*header));
|
|
|
|
/* Open metadata file. */
|
|
const size_t metadata_size = this->dir_hash_table_size + this->dir_table_size + this->file_hash_table_size + this->file_table_size;
|
|
FsFile metadata_file;
|
|
R_ABORT_UNLESS(mitm::fs::CreateAndOpenAtmosphereSdFile(&metadata_file, this->program_id, "romfs_metadata.bin", metadata_size));
|
|
|
|
/* Ensure later hash tables will have correct defaults. */
|
|
static_assert(EmptyEntry == 0xFFFFFFFF);
|
|
|
|
/* Emplace metadata source info. */
|
|
out_infos->emplace_back(0, sizeof(*header), DataSourceType::Memory, header);
|
|
|
|
/* Process Files. */
|
|
{
|
|
u32 entry_offset = 0;
|
|
BuildFileContext *cur_file = nullptr;
|
|
BuildFileContext *prev_file = nullptr;
|
|
for (const auto &it : this->files) {
|
|
cur_file = it.get();
|
|
|
|
/* By default, pad to 0x10 alignment. */
|
|
this->file_partition_size = util::AlignUp(this->file_partition_size, 0x10);
|
|
|
|
/* Check if extra padding is present in original source, preserve it to make our life easier. */
|
|
const bool is_storage_or_file = cur_file->source_type == DataSourceType::Storage || cur_file->source_type == DataSourceType::File;
|
|
if (prev_file != nullptr && prev_file->source_type == cur_file->source_type && is_storage_or_file) {
|
|
const s64 expected = this->file_partition_size - prev_file->offset + prev_file->orig_offset;
|
|
if (expected != cur_file->orig_offset) {
|
|
AMS_ABORT_UNLESS(expected <= cur_file->orig_offset);
|
|
this->file_partition_size += cur_file->orig_offset - expected;
|
|
}
|
|
}
|
|
|
|
/* Calculate offsets. */
|
|
cur_file->offset = this->file_partition_size;
|
|
this->file_partition_size += cur_file->size;
|
|
cur_file->entry_offset = entry_offset;
|
|
entry_offset += sizeof(FileEntry) + util::AlignUp(cur_file->path_len, 4);
|
|
|
|
/* Save current file as prev for next iteration. */
|
|
prev_file = cur_file;
|
|
}
|
|
/* Assign deferred parent/sibling ownership. */
|
|
for (auto it = this->files.rbegin(); it != this->files.rend(); it++) {
|
|
cur_file = it->get();
|
|
cur_file->sibling = cur_file->parent->file;
|
|
cur_file->parent->file = cur_file;
|
|
}
|
|
}
|
|
|
|
/* Process Directories. */
|
|
{
|
|
u32 entry_offset = 0;
|
|
BuildDirectoryContext *cur_dir = nullptr;
|
|
for (const auto &it : this->directories) {
|
|
cur_dir = it.get();
|
|
cur_dir->entry_offset = entry_offset;
|
|
entry_offset += sizeof(DirectoryEntry) + util::AlignUp(cur_dir->path_len, 4);
|
|
}
|
|
/* Assign deferred parent/sibling ownership. */
|
|
for (auto it = this->directories.rbegin(); it != this->directories.rend(); it++) {
|
|
cur_dir = it->get();
|
|
if (cur_dir == this->root) {
|
|
continue;
|
|
}
|
|
cur_dir->sibling = cur_dir->parent->child;
|
|
cur_dir->parent->child = cur_dir;
|
|
}
|
|
}
|
|
|
|
/* Populate file tables. */
|
|
{
|
|
/* Allocate the hash table. */
|
|
void *fht_buf = std::malloc(this->file_hash_table_size);
|
|
AMS_ABORT_UNLESS(fht_buf != nullptr);
|
|
u32 *file_hash_table = reinterpret_cast<u32 *>(fht_buf);
|
|
std::memset(file_hash_table, 0xFF, this->file_hash_table_size);
|
|
ON_SCOPE_EXIT {
|
|
R_ABORT_UNLESS(fsFileWrite(&metadata_file, this->dir_hash_table_size + this->dir_table_size, file_hash_table, this->file_hash_table_size, FsWriteOption_None));
|
|
std::free(fht_buf);
|
|
};
|
|
|
|
/* Write the file table. */
|
|
{
|
|
FileTableWriter file_table(&metadata_file, this->dir_hash_table_size + this->dir_table_size + this->file_hash_table_size, this->file_table_size);
|
|
|
|
for (const auto &it : this->files) {
|
|
BuildFileContext *cur_file = it.get();
|
|
FileEntry *cur_entry = file_table.GetEntry(cur_file->entry_offset, cur_file->path_len);
|
|
|
|
/* Set entry fields. */
|
|
cur_entry->parent = cur_file->parent->entry_offset;
|
|
cur_entry->sibling = (cur_file->sibling == nullptr) ? EmptyEntry : cur_file->sibling->entry_offset;
|
|
cur_entry->offset = cur_file->offset;
|
|
cur_entry->size = cur_file->size;
|
|
|
|
/* Insert into hash table. */
|
|
const u32 name_size = cur_file->path_len;
|
|
const size_t hash_ind = CalculatePathHash(cur_entry->parent, cur_file->path.get(), 0, name_size) % num_file_hash_table_entries;
|
|
cur_entry->hash = file_hash_table[hash_ind];
|
|
file_hash_table[hash_ind] = cur_file->entry_offset;
|
|
|
|
/* Set name. */
|
|
cur_entry->name_size = name_size;
|
|
if (name_size) {
|
|
std::memcpy(cur_entry->name, cur_file->path.get(), name_size);
|
|
for (size_t i = name_size; i < util::AlignUp(name_size, 4); i++) {
|
|
cur_entry->name[i] = 0;
|
|
}
|
|
}
|
|
|
|
/* Emplace a source. */
|
|
switch (cur_file->source_type) {
|
|
case DataSourceType::Storage:
|
|
case DataSourceType::File:
|
|
{
|
|
/* Try to compact if possible. */
|
|
auto &back = out_infos->back();
|
|
if (back.source_type == cur_file->source_type) {
|
|
back.size = cur_file->offset + FilePartitionOffset + cur_file->size - back.virtual_offset;
|
|
} else {
|
|
out_infos->emplace_back(cur_file->offset + FilePartitionOffset, cur_file->size, cur_file->source_type, cur_file->orig_offset + FilePartitionOffset);
|
|
}
|
|
}
|
|
break;
|
|
case DataSourceType::LooseSdFile:
|
|
{
|
|
char *new_path = new char[cur_file->GetPathLength() + 1];
|
|
cur_file->GetPath(new_path);
|
|
out_infos->emplace_back(cur_file->offset + FilePartitionOffset, cur_file->size, cur_file->source_type, new_path);
|
|
}
|
|
break;
|
|
AMS_UNREACHABLE_DEFAULT_CASE();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Populate directory tables. */
|
|
{
|
|
/* Allocate the hash table. */
|
|
void *dht_buf = std::malloc(this->dir_hash_table_size);
|
|
AMS_ABORT_UNLESS(dht_buf != nullptr);
|
|
u32 *dir_hash_table = reinterpret_cast<u32 *>(dht_buf);
|
|
std::memset(dir_hash_table, 0xFF, this->dir_hash_table_size);
|
|
ON_SCOPE_EXIT {
|
|
R_ABORT_UNLESS(fsFileWrite(&metadata_file, 0, dir_hash_table, this->dir_hash_table_size, FsWriteOption_None));
|
|
std::free(dht_buf);
|
|
};
|
|
|
|
/* Write the file table. */
|
|
{
|
|
DirectoryTableWriter dir_table(&metadata_file, this->dir_hash_table_size, this->dir_table_size);
|
|
|
|
for (const auto &it : this->directories) {
|
|
BuildDirectoryContext *cur_dir = it.get();
|
|
DirectoryEntry *cur_entry = dir_table.GetEntry(cur_dir->entry_offset, cur_dir->path_len);
|
|
|
|
/* Set entry fields. */
|
|
cur_entry->parent = cur_dir == this->root ? 0 : cur_dir->parent->entry_offset;
|
|
cur_entry->sibling = (cur_dir->sibling == nullptr) ? EmptyEntry : cur_dir->sibling->entry_offset;
|
|
cur_entry->child = (cur_dir->child == nullptr) ? EmptyEntry : cur_dir->child->entry_offset;
|
|
cur_entry->file = (cur_dir->file == nullptr) ? EmptyEntry : cur_dir->file->entry_offset;
|
|
|
|
/* Insert into hash table. */
|
|
const u32 name_size = cur_dir->path_len;
|
|
const size_t hash_ind = CalculatePathHash(cur_entry->parent, cur_dir->path.get(), 0, name_size) % num_dir_hash_table_entries;
|
|
cur_entry->hash = dir_hash_table[hash_ind];
|
|
dir_hash_table[hash_ind] = cur_dir->entry_offset;
|
|
|
|
/* Set name. */
|
|
cur_entry->name_size = name_size;
|
|
if (name_size) {
|
|
std::memcpy(cur_entry->name, cur_dir->path.get(), name_size);
|
|
for (size_t i = name_size; i < util::AlignUp(name_size, 4); i++) {
|
|
cur_entry->name[i] = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Delete maps. */
|
|
this->root = nullptr;
|
|
this->directories.clear();
|
|
this->files.clear();
|
|
|
|
/* Set header fields. */
|
|
header->header_size = sizeof(*header);
|
|
header->file_hash_table_size = this->file_hash_table_size;
|
|
header->file_table_size = this->file_table_size;
|
|
header->dir_hash_table_size = this->dir_hash_table_size;
|
|
header->dir_table_size = this->dir_table_size;
|
|
header->file_partition_ofs = FilePartitionOffset;
|
|
header->dir_hash_table_ofs = util::AlignUp(FilePartitionOffset + this->file_partition_size, 4);
|
|
header->dir_table_ofs = header->dir_hash_table_ofs + header->dir_hash_table_size;
|
|
header->file_hash_table_ofs = header->dir_table_ofs + header->dir_table_size;
|
|
header->file_table_ofs = header->file_hash_table_ofs + header->file_hash_table_size;
|
|
|
|
/* Save metadata to the SD card, to save on memory space. */
|
|
{
|
|
R_ABORT_UNLESS(fsFileFlush(&metadata_file));
|
|
out_infos->emplace_back(header->dir_hash_table_ofs, metadata_size, DataSourceType::Metadata, new RemoteFile(metadata_file));
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
}
|