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408 lines
15 KiB
C++
408 lines
15 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <memory>
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#include "common/file_util.h"
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#include "common/logging/log.h"
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#include "core/file_sys/archive_sdmc.h"
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#include "core/file_sys/disk_archive.h"
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#include "core/file_sys/errors.h"
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#include "core/file_sys/path_parser.h"
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#include "core/settings.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// FileSys namespace
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namespace FileSys {
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class SDMCDelayGenerator : public DelayGenerator {
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public:
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u64 GetReadDelayNs(std::size_t length) override {
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// This is the delay measured on O3DS and O2DS with
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// https://gist.github.com/B3n30/ac40eac20603f519ff106107f4ac9182
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// from the results the average of each length was taken.
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static constexpr u64 slope(183);
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static constexpr u64 offset(524879);
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static constexpr u64 minimum(631826);
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u64 IPCDelayNanoseconds = std::max<u64>(static_cast<u64>(length) * slope + offset, minimum);
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return IPCDelayNanoseconds;
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}
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u64 GetOpenDelayNs() override {
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// This is the delay measured on O3DS and O2DS with
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// https://gist.github.com/FearlessTobi/c37e143c314789251f98f2c45cd706d2
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// from the results the average of each length was taken.
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static constexpr u64 IPCDelayNanoseconds(269082);
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return IPCDelayNanoseconds;
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}
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};
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ResultVal<std::unique_ptr<FileBackend>> SDMCArchive::OpenFile(const Path& path,
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const Mode& mode) const {
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Mode modified_mode;
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modified_mode.hex = mode.hex;
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// SDMC archive always opens a file with at least read permission
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modified_mode.read_flag.Assign(1);
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return OpenFileBase(path, modified_mode);
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}
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ResultVal<std::unique_ptr<FileBackend>> SDMCArchive::OpenFileBase(const Path& path,
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const Mode& mode) const {
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LOG_DEBUG(Service_FS, "called path={} mode={:01X}", path.DebugStr(), mode.hex);
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const PathParser path_parser(path);
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if (!path_parser.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid path {}", path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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if (mode.hex == 0) {
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LOG_ERROR(Service_FS, "Empty open mode");
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return ERROR_INVALID_OPEN_FLAGS;
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}
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if (mode.create_flag && !mode.write_flag) {
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LOG_ERROR(Service_FS, "Create flag set but write flag not set");
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return ERROR_INVALID_OPEN_FLAGS;
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}
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const auto full_path = path_parser.BuildHostPath(mount_point);
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switch (path_parser.GetHostStatus(mount_point)) {
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case PathParser::InvalidMountPoint:
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LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point {}", mount_point);
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return ERROR_NOT_FOUND;
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case PathParser::PathNotFound:
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case PathParser::FileInPath:
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LOG_ERROR(Service_FS, "Path not found {}", full_path);
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return ERROR_NOT_FOUND;
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case PathParser::DirectoryFound:
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LOG_ERROR(Service_FS, "{} is not a file", full_path);
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return ERROR_UNEXPECTED_FILE_OR_DIRECTORY_SDMC;
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case PathParser::NotFound:
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if (!mode.create_flag) {
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LOG_ERROR(Service_FS, "Non-existing file {} can't be open without mode create.",
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full_path);
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return ERROR_NOT_FOUND;
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} else {
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// Create the file
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FileUtil::CreateEmptyFile(full_path);
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}
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break;
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case PathParser::FileFound:
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break; // Expected 'success' case
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}
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FileUtil::IOFile file(full_path, mode.write_flag ? "r+b" : "rb");
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if (!file.IsOpen()) {
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LOG_CRITICAL(Service_FS, "(unreachable) Unknown error opening {}", full_path);
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return ERROR_NOT_FOUND;
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}
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std::unique_ptr<DelayGenerator> delay_generator = std::make_unique<SDMCDelayGenerator>();
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auto disk_file = std::make_unique<DiskFile>(std::move(file), mode, std::move(delay_generator));
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return MakeResult<std::unique_ptr<FileBackend>>(std::move(disk_file));
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}
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ResultCode SDMCArchive::DeleteFile(const Path& path) const {
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const PathParser path_parser(path);
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if (!path_parser.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid path {}", path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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const auto full_path = path_parser.BuildHostPath(mount_point);
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switch (path_parser.GetHostStatus(mount_point)) {
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case PathParser::InvalidMountPoint:
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LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point {}", mount_point);
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return ERROR_NOT_FOUND;
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case PathParser::PathNotFound:
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case PathParser::FileInPath:
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case PathParser::NotFound:
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LOG_ERROR(Service_FS, "{} not found", full_path);
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return ERROR_NOT_FOUND;
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case PathParser::DirectoryFound:
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LOG_ERROR(Service_FS, "{} is not a file", full_path);
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return ERROR_UNEXPECTED_FILE_OR_DIRECTORY_SDMC;
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case PathParser::FileFound:
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break; // Expected 'success' case
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}
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if (FileUtil::Delete(full_path)) {
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return RESULT_SUCCESS;
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}
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LOG_CRITICAL(Service_FS, "(unreachable) Unknown error deleting {}", full_path);
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return ERROR_NOT_FOUND;
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}
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ResultCode SDMCArchive::RenameFile(const Path& src_path, const Path& dest_path) const {
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const PathParser path_parser_src(src_path);
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// TODO: Verify these return codes with HW
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if (!path_parser_src.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid src path {}", src_path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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const PathParser path_parser_dest(dest_path);
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if (!path_parser_dest.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid dest path {}", dest_path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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const auto src_path_full = path_parser_src.BuildHostPath(mount_point);
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const auto dest_path_full = path_parser_dest.BuildHostPath(mount_point);
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if (FileUtil::Rename(src_path_full, dest_path_full)) {
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return RESULT_SUCCESS;
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}
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// TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't
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// exist or similar. Verify.
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return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description
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ErrorSummary::NothingHappened, ErrorLevel::Status);
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}
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template <typename T>
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static ResultCode DeleteDirectoryHelper(const Path& path, const std::string& mount_point,
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T deleter) {
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const PathParser path_parser(path);
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if (!path_parser.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid path {}", path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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if (path_parser.IsRootDirectory())
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return ERROR_NOT_FOUND;
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const auto full_path = path_parser.BuildHostPath(mount_point);
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switch (path_parser.GetHostStatus(mount_point)) {
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case PathParser::InvalidMountPoint:
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LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point {}", mount_point);
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return ERROR_NOT_FOUND;
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case PathParser::PathNotFound:
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case PathParser::NotFound:
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LOG_ERROR(Service_FS, "Path not found {}", full_path);
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return ERROR_NOT_FOUND;
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case PathParser::FileInPath:
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case PathParser::FileFound:
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LOG_ERROR(Service_FS, "Unexpected file in path {}", full_path);
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return ERROR_UNEXPECTED_FILE_OR_DIRECTORY_SDMC;
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case PathParser::DirectoryFound:
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break; // Expected 'success' case
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}
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if (deleter(full_path)) {
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return RESULT_SUCCESS;
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}
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LOG_ERROR(Service_FS, "Directory not empty {}", full_path);
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return ERROR_UNEXPECTED_FILE_OR_DIRECTORY_SDMC;
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}
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ResultCode SDMCArchive::DeleteDirectory(const Path& path) const {
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return DeleteDirectoryHelper(path, mount_point, FileUtil::DeleteDir);
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}
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ResultCode SDMCArchive::DeleteDirectoryRecursively(const Path& path) const {
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return DeleteDirectoryHelper(
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path, mount_point, [](const std::string& p) { return FileUtil::DeleteDirRecursively(p); });
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}
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ResultCode SDMCArchive::CreateFile(const FileSys::Path& path, u64 size) const {
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const PathParser path_parser(path);
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if (!path_parser.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid path {}", path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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const auto full_path = path_parser.BuildHostPath(mount_point);
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switch (path_parser.GetHostStatus(mount_point)) {
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case PathParser::InvalidMountPoint:
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LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point {}", mount_point);
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return ERROR_NOT_FOUND;
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case PathParser::PathNotFound:
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case PathParser::FileInPath:
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LOG_ERROR(Service_FS, "Path not found {}", full_path);
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return ERROR_NOT_FOUND;
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case PathParser::DirectoryFound:
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LOG_ERROR(Service_FS, "{} already exists", full_path);
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return ERROR_UNEXPECTED_FILE_OR_DIRECTORY_SDMC;
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case PathParser::FileFound:
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LOG_ERROR(Service_FS, "{} already exists", full_path);
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return ERROR_ALREADY_EXISTS;
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case PathParser::NotFound:
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break; // Expected 'success' case
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}
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if (size == 0) {
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FileUtil::CreateEmptyFile(full_path);
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return RESULT_SUCCESS;
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}
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FileUtil::IOFile file(full_path, "wb");
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// Creates a sparse file (or a normal file on filesystems without the concept of sparse files)
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// We do this by seeking to the right size, then writing a single null byte.
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if (file.Seek(size - 1, SEEK_SET) && file.WriteBytes("", 1) == 1) {
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return RESULT_SUCCESS;
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}
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LOG_ERROR(Service_FS, "Too large file");
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return ResultCode(ErrorDescription::TooLarge, ErrorModule::FS, ErrorSummary::OutOfResource,
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ErrorLevel::Info);
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}
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ResultCode SDMCArchive::CreateDirectory(const Path& path) const {
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const PathParser path_parser(path);
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if (!path_parser.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid path {}", path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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const auto full_path = path_parser.BuildHostPath(mount_point);
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switch (path_parser.GetHostStatus(mount_point)) {
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case PathParser::InvalidMountPoint:
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LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point {}", mount_point);
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return ERROR_NOT_FOUND;
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case PathParser::PathNotFound:
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case PathParser::FileInPath:
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LOG_ERROR(Service_FS, "Path not found {}", full_path);
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return ERROR_NOT_FOUND;
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case PathParser::DirectoryFound:
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case PathParser::FileFound:
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LOG_ERROR(Service_FS, "{} already exists", full_path);
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return ERROR_ALREADY_EXISTS;
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case PathParser::NotFound:
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break; // Expected 'success' case
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}
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if (FileUtil::CreateDir(mount_point + path.AsString())) {
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return RESULT_SUCCESS;
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}
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LOG_CRITICAL(Service_FS, "(unreachable) Unknown error creating {}", mount_point);
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return ResultCode(ErrorDescription::NoData, ErrorModule::FS, ErrorSummary::Canceled,
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ErrorLevel::Status);
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}
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ResultCode SDMCArchive::RenameDirectory(const Path& src_path, const Path& dest_path) const {
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const PathParser path_parser_src(src_path);
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// TODO: Verify these return codes with HW
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if (!path_parser_src.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid src path {}", src_path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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const PathParser path_parser_dest(dest_path);
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if (!path_parser_dest.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid dest path {}", dest_path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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const auto src_path_full = path_parser_src.BuildHostPath(mount_point);
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const auto dest_path_full = path_parser_dest.BuildHostPath(mount_point);
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if (FileUtil::Rename(src_path_full, dest_path_full)) {
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return RESULT_SUCCESS;
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}
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// TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't
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// exist or similar. Verify.
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return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description
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ErrorSummary::NothingHappened, ErrorLevel::Status);
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}
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ResultVal<std::unique_ptr<DirectoryBackend>> SDMCArchive::OpenDirectory(const Path& path) const {
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const PathParser path_parser(path);
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if (!path_parser.IsValid()) {
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LOG_ERROR(Service_FS, "Invalid path {}", path.DebugStr());
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return ERROR_INVALID_PATH;
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}
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const auto full_path = path_parser.BuildHostPath(mount_point);
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switch (path_parser.GetHostStatus(mount_point)) {
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case PathParser::InvalidMountPoint:
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LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point {}", mount_point);
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return ERROR_NOT_FOUND;
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case PathParser::PathNotFound:
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case PathParser::NotFound:
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case PathParser::FileFound:
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LOG_ERROR(Service_FS, "{} not found", full_path);
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return ERROR_NOT_FOUND;
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case PathParser::FileInPath:
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LOG_ERROR(Service_FS, "Unexpected file in path {}", full_path);
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return ERROR_UNEXPECTED_FILE_OR_DIRECTORY_SDMC;
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case PathParser::DirectoryFound:
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break; // Expected 'success' case
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}
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auto directory = std::make_unique<DiskDirectory>(full_path);
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return MakeResult<std::unique_ptr<DirectoryBackend>>(std::move(directory));
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}
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u64 SDMCArchive::GetFreeBytes() const {
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// TODO: Stubbed to return 1GiB
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return 1024 * 1024 * 1024;
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}
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ArchiveFactory_SDMC::ArchiveFactory_SDMC(const std::string& sdmc_directory)
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: sdmc_directory(sdmc_directory) {
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LOG_DEBUG(Service_FS, "Directory {} set as SDMC.", sdmc_directory);
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}
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bool ArchiveFactory_SDMC::Initialize() {
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if (!Settings::values.use_virtual_sd) {
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LOG_WARNING(Service_FS, "SDMC disabled by config.");
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return false;
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}
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if (!FileUtil::CreateFullPath(sdmc_directory)) {
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LOG_ERROR(Service_FS, "Unable to create SDMC path.");
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return false;
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}
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return true;
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}
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ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SDMC::Open(const Path& path,
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u64 program_id) {
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std::unique_ptr<DelayGenerator> delay_generator = std::make_unique<SDMCDelayGenerator>();
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auto archive = std::make_unique<SDMCArchive>(sdmc_directory, std::move(delay_generator));
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return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
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}
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ResultCode ArchiveFactory_SDMC::Format(const Path& path,
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const FileSys::ArchiveFormatInfo& format_info,
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u64 program_id) {
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// This is kind of an undesirable operation, so let's just ignore it. :)
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return RESULT_SUCCESS;
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}
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ResultVal<ArchiveFormatInfo> ArchiveFactory_SDMC::GetFormatInfo(const Path& path,
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u64 program_id) const {
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// TODO(Subv): Implement
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LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive {}", GetName());
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return ResultCode(-1);
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}
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} // namespace FileSys
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