Merge pull request #381 from Subv/savedatacheck

Implemented the SaveDataCheck archive

src/common/common_paths.h

@@ -42,6 +42,7 @@
 #define SDMC_DIR          "sdmc"
 #define EXTSAVEDATA_DIR   "extsavedata"
 #define SAVEDATA_DIR      "savedata"
+#define SAVEDATACHECK_DIR "savedatacheck"
 #define SYSDATA_DIR       "sysdata"
 #define SYSSAVEDATA_DIR   "syssavedata"
 #define SHADERCACHE_DIR   "shader_cache"

src/common/file_util.cpp

@@ -678,6 +678,7 @@ const std::string& GetUserPath(const unsigned int DirIDX, const std::string &new
         paths[D_SDMC_IDX]           = paths[D_USER_IDX] + SDMC_DIR DIR_SEP;
         paths[D_EXTSAVEDATA]        = paths[D_USER_IDX] + EXTSAVEDATA_DIR DIR_SEP;
         paths[D_SAVEDATA_IDX]       = paths[D_USER_IDX] + SAVEDATA_DIR DIR_SEP;
+        paths[D_SAVEDATACHECK_IDX]  = paths[D_USER_IDX] + SAVEDATACHECK_DIR DIR_SEP;
         paths[D_SYSDATA_IDX]        = paths[D_USER_IDX] + SYSDATA_DIR DIR_SEP;
         paths[D_SYSSAVEDATA_IDX]    = paths[D_USER_IDX] + SYSSAVEDATA_DIR DIR_SEP;
         paths[D_SHADERCACHE_IDX]    = paths[D_USER_IDX] + SHADERCACHE_DIR DIR_SEP;
@@ -723,6 +724,7 @@ const std::string& GetUserPath(const unsigned int DirIDX, const std::string &new
             paths[D_SDMC_IDX]           = paths[D_USER_IDX] + SDMC_DIR DIR_SEP;
             paths[D_EXTSAVEDATA]        = paths[D_USER_IDX] + EXTSAVEDATA_DIR DIR_SEP;
             paths[D_SAVEDATA_IDX]       = paths[D_USER_IDX] + SAVEDATA_DIR DIR_SEP;
+            paths[D_SAVEDATACHECK_IDX]  = paths[D_USER_IDX] + SAVEDATACHECK_DIR DIR_SEP;
             paths[D_SYSSAVEDATA_IDX]    = paths[D_USER_IDX] + SYSSAVEDATA_DIR DIR_SEP;
             paths[D_SHADERCACHE_IDX]    = paths[D_USER_IDX] + SHADERCACHE_DIR DIR_SEP;
             paths[D_SHADERS_IDX]        = paths[D_USER_IDX] + SHADERS_DIR DIR_SEP;

src/common/file_util.h

@@ -29,6 +29,7 @@ enum {
     D_SDMC_IDX,
     D_EXTSAVEDATA,
     D_SAVEDATA_IDX,
+    D_SAVEDATACHECK_IDX,
     D_SYSDATA_IDX,
     D_SYSSAVEDATA_IDX,
     D_HIRESTEXTURES_IDX,

src/core/CMakeLists.txt

@@ -20,11 +20,11 @@ set(SRCS
             file_sys/archive_extsavedata.cpp
             file_sys/archive_romfs.cpp
             file_sys/archive_savedata.cpp
+            file_sys/archive_savedatacheck.cpp
             file_sys/archive_sdmc.cpp
             file_sys/archive_systemsavedata.cpp
             file_sys/disk_archive.cpp
-            file_sys/file_romfs.cpp
-            file_sys/directory_romfs.cpp
+            file_sys/ivfc_archive.cpp
             hle/kernel/address_arbiter.cpp
             hle/kernel/event.cpp
             hle/kernel/kernel.cpp
@@ -108,13 +108,13 @@ set(HEADERS
             file_sys/archive_extsavedata.h
             file_sys/archive_romfs.h
             file_sys/archive_savedata.h
+            file_sys/archive_savedatacheck.h
             file_sys/archive_sdmc.h
             file_sys/archive_systemsavedata.h
             file_sys/disk_archive.h
             file_sys/file_backend.h
-            file_sys/file_romfs.h
+            file_sys/ivfc_archive.h
             file_sys/directory_backend.h
-            file_sys/directory_romfs.h
             hle/kernel/address_arbiter.h
             hle/kernel/event.h
             hle/kernel/kernel.h

src/core/file_sys/archive_backend.h

@@ -88,6 +88,7 @@ public:
     const std::string DebugStr() const {
         switch (GetType()) {
         case Invalid:
+        default:
             return "[Invalid]";
         case Empty:
             return "[Empty]";
@@ -117,6 +118,7 @@ public:
             return {};
         case Invalid:
         case Binary:
+        default:
             // TODO(yuriks): Add assert
             LOG_ERROR(Service_FS, "LowPathType cannot be converted to string!");
             return {};
@@ -159,6 +161,7 @@ public:
         case Empty:
             return {};
         case Invalid:
+        default:
             // TODO(yuriks): Add assert
             LOG_ERROR(Service_FS, "LowPathType cannot be converted to binary!");
             return {};

src/core/file_sys/archive_romfs.cpp

@@ -5,11 +5,10 @@
 #include <memory>
 
 #include "common/common_types.h"
+#include "common/file_util.h"
 #include "common/make_unique.h"
 
 #include "core/file_sys/archive_romfs.h"
-#include "core/file_sys/directory_romfs.h"
-#include "core/file_sys/file_romfs.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
@@ -23,48 +22,4 @@ Archive_RomFS::Archive_RomFS(const Loader::AppLoader& app_loader) {
     }
 }
 
-std::unique_ptr<FileBackend> Archive_RomFS::OpenFile(const Path& path, const Mode mode) const {
-    return Common::make_unique<File_RomFS>(this);
-}
-
-bool Archive_RomFS::DeleteFile(const Path& path) const {
-    LOG_WARNING(Service_FS, "Attempted to delete a file from ROMFS.");
-    return false;
-}
-
-bool Archive_RomFS::RenameFile(const Path& src_path, const Path& dest_path) const {
-    LOG_WARNING(Service_FS, "Attempted to rename a file within ROMFS.");
-    return false;
-}
-
-bool Archive_RomFS::DeleteDirectory(const Path& path) const {
-    LOG_WARNING(Service_FS, "Attempted to delete a directory from ROMFS.");
-    return false;
-}
-
-ResultCode Archive_RomFS::CreateFile(const Path& path, u32 size) const {
-    LOG_WARNING(Service_FS, "Attempted to create a file in ROMFS.");
-    // TODO: Verify error code
-    return ResultCode(ErrorDescription::NotAuthorized, ErrorModule::FS, ErrorSummary::NotSupported, ErrorLevel::Permanent);
-}
-
-bool Archive_RomFS::CreateDirectory(const Path& path) const {
-    LOG_WARNING(Service_FS, "Attempted to create a directory in ROMFS.");
-    return false;
-}
-
-bool Archive_RomFS::RenameDirectory(const Path& src_path, const Path& dest_path) const {
-    LOG_WARNING(Service_FS, "Attempted to rename a file within ROMFS.");
-    return false;
-}
-
-std::unique_ptr<DirectoryBackend> Archive_RomFS::OpenDirectory(const Path& path) const {
-    return Common::make_unique<Directory_RomFS>();
-}
-
-ResultCode Archive_RomFS::Format(const Path& path) const {
-    LOG_WARNING(Service_FS, "Attempted to format ROMFS.");
-    return UnimplementedFunction(ErrorModule::FS);
-}
-
 } // namespace FileSys

src/core/file_sys/archive_romfs.h

@@ -8,7 +8,7 @@
 
 #include "common/common_types.h"
 
-#include "core/file_sys/archive_backend.h"
+#include "core/file_sys/ivfc_archive.h"
 #include "core/loader/loader.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -17,82 +17,12 @@
 namespace FileSys {
 
 /// File system interface to the RomFS archive
-class Archive_RomFS final : public ArchiveBackend {
+class Archive_RomFS final : public IVFCArchive {
 public:
     Archive_RomFS(const Loader::AppLoader& app_loader);
 
     std::string GetName() const override { return "RomFS"; }
-
-    /**
-     * Open a file specified by its path, using the specified mode
-     * @param path Path relative to the archive
-     * @param mode Mode to open the file with
-     * @return Opened file, or nullptr
-     */
-    std::unique_ptr<FileBackend> OpenFile(const Path& path, const Mode mode) const override;
-
-    /**
-     * Delete a file specified by its path
-     * @param path Path relative to the archive
-     * @return Whether the file could be deleted
-     */
-    bool DeleteFile(const Path& path) const override;
-
-    /**
-     * Rename a File specified by its path
-     * @param src_path Source path relative to the archive
-     * @param dest_path Destination path relative to the archive
-     * @return Whether rename succeeded
-     */
-    bool RenameFile(const Path& src_path, const Path& dest_path) const override;
-
-    /**
-     * Delete a directory specified by its path
-     * @param path Path relative to the archive
-     * @return Whether the directory could be deleted
-     */
-    bool DeleteDirectory(const Path& path) const override;
-
-    /**
-     * Create a file specified by its path
-     * @param path Path relative to the Archive
-     * @param size The size of the new file, filled with zeroes
-     * @return File creation result code
-     */
-    ResultCode CreateFile(const Path& path, u32 size) const override;
-
-    /**
-     * Create a directory specified by its path
-     * @param path Path relative to the archive
-     * @return Whether the directory could be created
-     */
-    bool CreateDirectory(const Path& path) const override;
-
-    /**
-     * Rename a Directory specified by its path
-     * @param src_path Source path relative to the archive
-     * @param dest_path Destination path relative to the archive
-     * @return Whether rename succeeded
-     */
-    bool RenameDirectory(const Path& src_path, const Path& dest_path) const override;
-
-    /**
-     * Open a directory specified by its path
-     * @param path Path relative to the archive
-     * @return Opened directory, or nullptr
-     */
-    std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const override;
-
-    ResultCode Open(const Path& path) override {
-        return RESULT_SUCCESS;
-    }
-
-    ResultCode Format(const Path& path) const override;
-
-private:
-    friend class File_RomFS;
-
-    std::vector<u8> raw_data;
+    ResultCode Open(const Path& path) override { return RESULT_SUCCESS; }
 };
 
 } // namespace FileSys

src/core/file_sys/archive_savedatacheck.cpp

@@ -0,0 +1,41 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/file_util.h"
+
+#include "core/file_sys/archive_savedatacheck.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+Archive_SaveDataCheck::Archive_SaveDataCheck(const std::string& mount_loc) : mount_point(mount_loc) {
+}
+
+ResultCode Archive_SaveDataCheck::Open(const Path& path) {
+    // TODO(Subv): We should not be overwriting raw_data everytime this function is called,
+    // but until we use factory classes to create the archives at runtime instead of creating them beforehand
+    // and allow multiple archives of the same type to be open at the same time without clobbering each other,
+    // we won't be able to maintain the state of each archive, hence we overwrite it every time it's needed.
+    // There are a number of problems with this, for example opening a file in this archive, then opening
+    // this archive again with a different path, will corrupt the previously open file.
+    auto vec = path.AsBinary();
+    const u32* data = reinterpret_cast<u32*>(vec.data());
+    std::string file_path = Common::StringFromFormat("%s%08x%08x.bin", mount_point.c_str(), data[1], data[0]);
+    FileUtil::IOFile file(file_path, "rb");
+
+    std::fill(raw_data.begin(), raw_data.end(), 0);
+
+    if (!file.IsOpen()) {
+        return ResultCode(-1); // TODO(Subv): Find the right error code
+    }
+    auto size = file.GetSize();
+    raw_data.resize(size);
+    file.ReadBytes(raw_data.data(), size);
+    file.Close();
+    return RESULT_SUCCESS;
+}
+
+} // namespace FileSys

src/core/file_sys/archive_savedatacheck.h

@@ -0,0 +1,31 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+
+#include "common/common_types.h"
+
+#include "core/file_sys/ivfc_archive.h"
+#include "core/loader/loader.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+/// File system interface to the SaveDataCheck archive
+class Archive_SaveDataCheck final : public IVFCArchive {
+public:
+    Archive_SaveDataCheck(const std::string& mount_point);
+
+    std::string GetName() const override { return "SaveDataCheck"; }
+    ResultCode Open(const Path& path) override;
+
+private:
+    std::string mount_point;
+};
+
+} // namespace FileSys

src/core/file_sys/directory_romfs.cpp

@@ -1,32 +0,0 @@
-// Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include "common/common_types.h"
-
-#include "core/file_sys/directory_romfs.h"
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// FileSys namespace
-
-namespace FileSys {
-
-Directory_RomFS::Directory_RomFS() {
-}
-
-Directory_RomFS::~Directory_RomFS() {
-}
-
-bool Directory_RomFS::Open() {
-    return false;
-}
-
-u32 Directory_RomFS::Read(const u32 count, Entry* entries) {
-    return 0;
-}
-
-bool Directory_RomFS::Close() const {
-    return false;
-}
-
-} // namespace FileSys

src/core/file_sys/directory_romfs.h

@@ -1,43 +0,0 @@
-// Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include "common/common_types.h"
-
-#include "core/file_sys/directory_backend.h"
-#include "core/loader/loader.h"
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// FileSys namespace
-
-namespace FileSys {
-
-class Directory_RomFS final : public DirectoryBackend {
-public:
-    Directory_RomFS();
-    ~Directory_RomFS() override;
-
-    /**
-    * Open the directory
-    * @return true if the directory opened correctly
-    */
-    bool Open() override;
-
-    /**
-     * List files contained in the directory
-     * @param count Number of entries to return at once in entries
-     * @param entries Buffer to read data into
-     * @return Number of entries listed
-     */
-    u32 Read(const u32 count, Entry* entries) override;
-
-    /**
-     * Close the directory
-     * @return true if the directory closed correctly
-     */
-    bool Close() const override;
-};
-
-} // namespace FileSys

src/core/file_sys/file_romfs.cpp

@@ -1,43 +0,0 @@
-// Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include "common/common_types.h"
-
-#include "core/file_sys/file_romfs.h"
-#include "core/file_sys/archive_romfs.h"
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// FileSys namespace
-
-namespace FileSys {
-
-bool File_RomFS::Open() {
-    return true;
-}
-
-size_t File_RomFS::Read(const u64 offset, const u32 length, u8* buffer) const {
-    LOG_TRACE(Service_FS, "called offset=%llu, length=%d", offset, length);
-    memcpy(buffer, &archive->raw_data[(u32)offset], length);
-    return length;
-}
-
-size_t File_RomFS::Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const {
-    LOG_WARNING(Service_FS, "Attempted to write to ROMFS.");
-    return 0;
-}
-
-size_t File_RomFS::GetSize() const {
-    return sizeof(u8) * archive->raw_data.size();
-}
-
-bool File_RomFS::SetSize(const u64 size) const {
-    LOG_WARNING(Service_FS, "Attempted to set the size of ROMFS");
-    return false;
-}
-
-bool File_RomFS::Close() const {
-    return false;
-}
-
-} // namespace FileSys

src/core/file_sys/file_romfs.h

@@ -1,73 +0,0 @@
-// Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include "common/common_types.h"
-
-#include "core/file_sys/file_backend.h"
-#include "core/loader/loader.h"
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// FileSys namespace
-
-namespace FileSys {
-
-class Archive_RomFS;
-
-class File_RomFS final : public FileBackend {
-public:
-    File_RomFS(const Archive_RomFS* archive) : archive(archive) {}
-
-    /**
-     * Open the file
-     * @return true if the file opened correctly
-     */
-    bool Open() override;
-
-    /**
-     * Read data from the file
-     * @param offset Offset in bytes to start reading data from
-     * @param length Length in bytes of data to read from file
-     * @param buffer Buffer to read data into
-     * @return Number of bytes read
-     */
-    size_t Read(const u64 offset, const u32 length, u8* buffer) const override;
-
-    /**
-     * Write data to the file
-     * @param offset Offset in bytes to start writing data to
-     * @param length Length in bytes of data to write to file
-     * @param flush The flush parameters (0 == do not flush)
-     * @param buffer Buffer to read data from
-     * @return Number of bytes written
-     */
-    size_t Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const override;
-
-    /**
-     * Get the size of the file in bytes
-     * @return Size of the file in bytes
-     */
-    size_t GetSize() const override;
-
-    /**
-     * Set the size of the file in bytes
-     * @param size New size of the file
-     * @return true if successful
-     */
-    bool SetSize(const u64 size) const override;
-
-    /**
-     * Close the file
-     * @return true if the file closed correctly
-     */
-    bool Close() const override;
-
-    void Flush() const override { }
-
-private:
-    const Archive_RomFS* archive;
-};
-
-} // namespace FileSys

src/core/file_sys/ivfc_archive.cpp

@@ -0,0 +1,88 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <memory>
+
+#include "common/common_types.h"
+#include "common/file_util.h"
+#include "common/make_unique.h"
+
+#include "core/file_sys/ivfc_archive.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+IVFCArchive::IVFCArchive() {
+}
+
+std::unique_ptr<FileBackend> IVFCArchive::OpenFile(const Path& path, const Mode mode) const {
+    return Common::make_unique<IVFCFile>(this);
+}
+
+bool IVFCArchive::DeleteFile(const Path& path) const {
+    LOG_CRITICAL(Service_FS, "Attempted to delete a file from an IVFC archive (%s).", GetName().c_str());
+    return false;
+}
+
+bool IVFCArchive::RenameFile(const Path& src_path, const Path& dest_path) const {
+    LOG_CRITICAL(Service_FS, "Attempted to rename a file within an IVFC archive (%s).", GetName().c_str());
+    return false;
+}
+
+bool IVFCArchive::DeleteDirectory(const Path& path) const {
+    LOG_CRITICAL(Service_FS, "Attempted to delete a directory from an IVFC archive (%s).", GetName().c_str());
+    return false;
+}
+
+ResultCode IVFCArchive::CreateFile(const Path& path, u32 size) const {
+    LOG_CRITICAL(Service_FS, "Attempted to create a file in an IVFC archive (%s).", GetName().c_str());
+    // TODO: Verify error code
+    return ResultCode(ErrorDescription::NotAuthorized, ErrorModule::FS, ErrorSummary::NotSupported, ErrorLevel::Permanent);
+}
+
+bool IVFCArchive::CreateDirectory(const Path& path) const {
+    LOG_CRITICAL(Service_FS, "Attempted to create a directory in an IVFC archive (%s).", GetName().c_str());
+    return false;
+}
+
+bool IVFCArchive::RenameDirectory(const Path& src_path, const Path& dest_path) const {
+    LOG_CRITICAL(Service_FS, "Attempted to rename a file within an IVFC archive (%s).", GetName().c_str());
+    return false;
+}
+
+std::unique_ptr<DirectoryBackend> IVFCArchive::OpenDirectory(const Path& path) const {
+    return Common::make_unique<IVFCDirectory>();
+}
+
+ResultCode IVFCArchive::Format(const Path& path) const {
+    LOG_CRITICAL(Service_FS, "Attempted to format an IVFC archive (%s).", GetName().c_str());
+    // TODO: Verify error code
+    return ResultCode(ErrorDescription::NotAuthorized, ErrorModule::FS, ErrorSummary::NotSupported, ErrorLevel::Permanent);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+size_t IVFCFile::Read(const u64 offset, const u32 length, u8* buffer) const {
+    LOG_TRACE(Service_FS, "called offset=%llu, length=%d", offset, length);
+    memcpy(buffer, &archive->raw_data[(u32)offset], length);
+    return length;
+}
+
+size_t IVFCFile::Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const {
+    LOG_CRITICAL(Service_FS, "Attempted to write to IVFC file in archive %s.", archive->GetName().c_str());
+    return 0;
+}
+
+size_t IVFCFile::GetSize() const {
+    return sizeof(u8) * archive->raw_data.size();
+}
+
+bool IVFCFile::SetSize(const u64 size) const {
+    LOG_CRITICAL(Service_FS, "Attempted to set the size of an IVFC file in archive %s", archive->GetName().c_str());
+    return false;
+}
+
+} // namespace FileSys

src/core/file_sys/ivfc_archive.h

@@ -0,0 +1,66 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+
+#include "common/common_types.h"
+
+#include "core/file_sys/archive_backend.h"
+#include "core/loader/loader.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+/**
+ * Helper which implements an interface to deal with IVFC images used in some archives
+ * This should be subclassed by concrete archive types, which will provide the
+ * input data (load the raw IVFC archive) and override any required methods
+ */
+class IVFCArchive : public ArchiveBackend {
+public:
+    IVFCArchive();
+
+    std::unique_ptr<FileBackend> OpenFile(const Path& path, const Mode mode) const override;
+    bool DeleteFile(const Path& path) const override;
+    bool RenameFile(const Path& src_path, const Path& dest_path) const override;
+    bool DeleteDirectory(const Path& path) const override;
+    ResultCode CreateFile(const Path& path, u32 size) const override;
+    bool CreateDirectory(const Path& path) const override;
+    bool RenameDirectory(const Path& src_path, const Path& dest_path) const override;
+    std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const override;
+    ResultCode Format(const Path& path) const override;
+
+protected:
+    friend class IVFCFile;
+    std::vector<u8> raw_data;
+};
+
+class IVFCFile : public FileBackend {
+public:
+    IVFCFile(const IVFCArchive* archive) : archive(archive) {}
+
+    bool Open() override { return true; }
+    size_t Read(const u64 offset, const u32 length, u8* buffer) const override;
+    size_t Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const override;
+    size_t GetSize() const override;
+    bool SetSize(const u64 size) const override;
+    bool Close() const override { return false; }
+    void Flush() const override { }
+
+private:
+    const IVFCArchive* archive;
+};
+
+class IVFCDirectory : public DirectoryBackend {
+public:
+    bool Open() override { return false; }
+    u32 Read(const u32 count, Entry* entries) override { return 0; }
+    bool Close() const override { return false; }
+};
+
+} // namespace FileSys

src/core/hle/service/fs/archive.cpp

@@ -10,9 +10,11 @@
 #include "common/make_unique.h"
 #include "common/math_util.h"
 
-#include "core/file_sys/archive_savedata.h"
-#include "core/file_sys/archive_extsavedata.h"
 #include "core/file_sys/archive_backend.h"
+#include "core/file_sys/archive_extsavedata.h"
+#include "core/file_sys/archive_romfs.h"
+#include "core/file_sys/archive_savedata.h"
+#include "core/file_sys/archive_savedatacheck.h"
 #include "core/file_sys/archive_sdmc.h"
 #include "core/file_sys/directory_backend.h"
 #include "core/hle/service/fs/archive.h"
@@ -50,6 +52,9 @@ enum class FileCommand : u32 {
     SetAttributes   = 0x08070040,
     Close           = 0x08080000,
     Flush           = 0x08090000,
+    SetPriority     = 0x080A0040,
+    GetPriority     = 0x080B0000,
+    OpenLinkFile    = 0x080C0000,
 };
 
 // Command to access directory
@@ -75,12 +80,13 @@ public:
 class File : public Kernel::Session {
 public:
     File(std::unique_ptr<FileSys::FileBackend>&& backend, const FileSys::Path& path)
-            : path(path), backend(std::move(backend)) {
+            : path(path), backend(std::move(backend)), priority(0) {
     }
 
     std::string GetName() const override { return "Path: " + path.DebugStr(); }
 
     FileSys::Path path; ///< Path of the file
+    u32 priority; ///< Priority of the file. TODO(Subv): Find out what this means
     std::unique_ptr<FileSys::FileBackend> backend; ///< File backend interface
 
     ResultVal<bool> SyncRequest() override {
@@ -145,6 +151,27 @@ public:
             break;
         }
 
+        case FileCommand::OpenLinkFile:
+        {
+            LOG_WARNING(Service_FS, "(STUBBED) File command OpenLinkFile %s", GetName().c_str());
+            cmd_buff[3] = GetHandle();
+            break;
+        }
+
+        case FileCommand::SetPriority:
+        {
+            priority = cmd_buff[1];
+            LOG_TRACE(Service_FS, "SetPriority %u", priority);
+            break;
+        }
+
+        case FileCommand::GetPriority:
+        {
+            cmd_buff[2] = priority;
+            LOG_TRACE(Service_FS, "GetPriority");
+            break;
+        }
+
         // Unknown command...
         default:
             LOG_ERROR(Service_FS, "Unknown command=0x%08X!", cmd);
@@ -327,7 +354,7 @@ ResultCode DeleteDirectoryFromArchive(ArchiveHandle archive_handle, const FileSy
                       ErrorSummary::Canceled, ErrorLevel::Status);
 }
 
-ResultCode CreateFileInArchive(Handle archive_handle, const FileSys::Path& path, u32 file_size) {
+ResultCode CreateFileInArchive(ArchiveHandle archive_handle, const FileSys::Path& path, u32 file_size) {
     Archive* archive = GetArchive(archive_handle);
     if (archive == nullptr)
         return InvalidHandle(ErrorModule::FS);
@@ -435,6 +462,11 @@ void ArchiveInit() {
     else
         LOG_ERROR(Service_FS, "Can't instantiate SharedExtSaveData archive with path %s", 
                   sharedextsavedata_directory.c_str());
+
+    // Create the SaveDataCheck archive, basically a small variation of the RomFS archive
+    std::string savedatacheck_directory = FileUtil::GetUserPath(D_SAVEDATACHECK_IDX);
+    auto savedatacheck_archive = Common::make_unique<FileSys::Archive_SaveDataCheck>(savedatacheck_directory);
+    CreateArchive(std::move(savedatacheck_archive), ArchiveIdCode::SaveDataCheck);
 }
 
 /// Shutdown archives

src/core/hle/service/fs/archive.h

@@ -22,6 +22,7 @@ enum class ArchiveIdCode : u32 {
     SystemSaveData      = 0x00000008,
     SDMC                = 0x00000009,
     SDMCWriteOnly       = 0x0000000A,
+    SaveDataCheck       = 0x2345678A,
 };
 
 typedef u64 ArchiveHandle;
@@ -90,7 +91,7 @@ ResultCode DeleteDirectoryFromArchive(ArchiveHandle archive_handle, const FileSy
  * @param file_size The size of the new file, filled with zeroes
  * @return File creation result code
  */
-ResultCode CreateFileInArchive(Handle archive_handle, const FileSys::Path& path, u32 file_size);
+ResultCode CreateFileInArchive(ArchiveHandle archive_handle, const FileSys::Path& path, u32 file_size);
 
 /**
  * Create a Directory from an Archive