mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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241 lines
10 KiB
C++
241 lines
10 KiB
C++
/*
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* Copyright (c) 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 "fsa/fs_mount_utils.hpp"
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#include "impl/fs_file_system_proxy_service_object.hpp"
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#include "impl/fs_file_system_service_object_adapter.hpp"
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namespace ams::fs {
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namespace {
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class HostRootCommonMountNameGenerator : public fsa::ICommonMountNameGenerator, public impl::Newable {
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public:
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explicit HostRootCommonMountNameGenerator() { /* ... */ }
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virtual Result GenerateCommonMountName(char *dst, size_t dst_size) override {
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/* Determine how much space we need. */
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constexpr size_t RequiredNameBufferSizeSize = AMS_FS_IMPL_HOST_ROOT_FILE_SYSTEM_MOUNT_NAME_LEN + 1 + 1;
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AMS_ASSERT(dst_size >= RequiredNameBufferSizeSize);
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AMS_UNUSED(RequiredNameBufferSizeSize);
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/* Generate the name. */
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const auto size = util::SNPrintf(dst, dst_size, AMS_FS_IMPL_HOST_ROOT_FILE_SYSTEM_MOUNT_NAME ":");
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AMS_ASSERT(static_cast<size_t>(size) == RequiredNameBufferSizeSize - 1);
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AMS_UNUSED(size);
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R_SUCCEED();
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}
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};
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class HostCommonMountNameGenerator : public fsa::ICommonMountNameGenerator, public impl::Newable {
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private:
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char m_path[fs::EntryNameLengthMax + 1];
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public:
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HostCommonMountNameGenerator(const char *path) {
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util::Strlcpy<char>(m_path, path, sizeof(m_path));
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}
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virtual Result GenerateCommonMountName(char *dst, size_t dst_size) override {
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/* Determine how much space we need. */
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const size_t required_size = AMS_FS_IMPL_HOST_ROOT_FILE_SYSTEM_MOUNT_NAME_LEN + 1 + util::Strnlen<char>(m_path, sizeof(m_path)) + 1; /* @Host:%s */
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R_UNLESS(dst_size >= required_size, fs::ResultTooLongPath());
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/* Generate the name. */
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const auto size = util::SNPrintf(dst, dst_size, AMS_FS_IMPL_HOST_ROOT_FILE_SYSTEM_MOUNT_NAME ":%s", m_path);
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AMS_ASSERT(static_cast<size_t>(size) == required_size - 1);
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AMS_UNUSED(size);
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R_SUCCEED();
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}
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};
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Result OpenHostFileSystemImpl(std::unique_ptr<fs::fsa::IFileSystem> *out, const fssrv::sf::FspPath &path, const MountHostOption &option) {
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/* Open the filesystem. */
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auto fsp = impl::GetFileSystemProxyServiceObject();
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sf::SharedPointer<fssrv::sf::IFileSystem> fs;
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if (option != MountHostOption::None) {
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R_TRY(fsp->OpenHostFileSystemWithOption(std::addressof(fs), path, option._value));
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} else {
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R_TRY(fsp->OpenHostFileSystem(std::addressof(fs), path));
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}
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/* Allocate a new filesystem wrapper. */
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auto fsa = std::make_unique<impl::FileSystemServiceObjectAdapter>(std::move(fs));
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R_UNLESS(fsa != nullptr, fs::ResultAllocationMemoryFailedInHostA());
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/* Set the output. */
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*out = std::move(fsa);
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R_SUCCEED();
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}
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Result PreMountHost(std::unique_ptr<fs::HostCommonMountNameGenerator> *out, const char *name, const char *path) {
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/* Check pre-conditions. */
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AMS_ASSERT(out != nullptr);
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/* Check the mount name. */
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R_TRY(impl::CheckMountName(name));
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/* Check that path is valid. */
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R_UNLESS(path != nullptr, fs::ResultNullptrArgument());
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/* Create a new HostCommonMountNameGenerator. */
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*out = std::make_unique<HostCommonMountNameGenerator>(path);
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R_UNLESS(out->get() != nullptr, fs::ResultAllocationMemoryFailedInHostB());
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R_SUCCEED();
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}
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}
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namespace impl {
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Result OpenHostFileSystem(std::unique_ptr<fs::fsa::IFileSystem> *out, const char *name, const char *path, const fs::MountHostOption &option) {
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/* Validate arguments. */
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R_UNLESS(out != nullptr, fs::ResultNullptrArgument());
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R_UNLESS(name != nullptr, fs::ResultNullptrArgument());
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R_UNLESS(path != nullptr, fs::ResultNullptrArgument());
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/* Check mount name isn't windows path or reserved. */
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R_UNLESS(!fs::IsWindowsDrive(name), fs::ResultInvalidMountName());
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R_UNLESS(!fs::impl::IsReservedMountName(name), fs::ResultInvalidMountName());
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/* Convert the path for fsp. */
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fssrv::sf::FspPath sf_path;
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R_TRY(fs::ConvertToFspPath(std::addressof(sf_path), path));
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/* Ensure that the path doesn't correspond to the root. */
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if (sf_path.str[0] == 0) {
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sf_path.str[0] = '.';
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sf_path.str[1] = 0;
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}
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/* Open the host file system. */
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R_RETURN(OpenHostFileSystemImpl(out, sf_path, option));
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}
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}
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Result MountHost(const char *name, const char *root_path) {
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/* Pre-mount host. */
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std::unique_ptr<fs::HostCommonMountNameGenerator> generator;
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AMS_FS_R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT_UNLESS_R_SUCCEEDED(PreMountHost(std::addressof(generator), name, root_path), name, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST(name, root_path)));
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/* Open the filesystem. */
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std::unique_ptr<fs::fsa::IFileSystem> fsa;
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R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT_UNLESS_R_SUCCEEDED(impl::OpenHostFileSystem(std::addressof(fsa), name, root_path, MountHostOption::None), name, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST(name, root_path)));
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/* Declare registration helper. */
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auto register_impl = [&]() -> Result {
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/* Register. */
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R_RETURN(fsa::Register(name, std::move(fsa), std::move(generator)));
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};
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/* Mount the filesystem. */
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AMS_FS_R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT(register_impl(), name, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST(name, root_path)));
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/* Enable access logging. */
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AMS_FS_IMPL_ACCESS_LOG_FS_ACCESSOR_ENABLE(name);
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R_SUCCEED();
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}
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Result MountHost(const char *name, const char *root_path, const MountHostOption &option) {
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/* Pre-mount host. */
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std::unique_ptr<fs::HostCommonMountNameGenerator> generator;
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AMS_FS_R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT_UNLESS_R_SUCCEEDED(PreMountHost(std::addressof(generator), name, root_path), name, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST_WITH_OPTION(name, root_path, option)));
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/* Open the filesystem. */
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std::unique_ptr<fs::fsa::IFileSystem> fsa;
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R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT_UNLESS_R_SUCCEEDED(impl::OpenHostFileSystem(std::addressof(fsa), name, root_path, option), name, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST_WITH_OPTION(name, root_path, option)));
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/* Declare registration helper. */
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auto register_impl = [&]() -> Result {
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/* Register. */
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R_RETURN(fsa::Register(name, std::move(fsa), std::move(generator)));
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};
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/* Mount the filesystem. */
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AMS_FS_R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT(register_impl(), name, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST_WITH_OPTION(name, root_path, option)));
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/* Enable access logging. */
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AMS_FS_IMPL_ACCESS_LOG_FS_ACCESSOR_ENABLE(name);
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R_SUCCEED();
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}
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Result MountHostRoot() {
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/* Create host root path. */
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fssrv::sf::FspPath sf_path;
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sf_path.str[0] = 0;
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/* Open the filesystem. */
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std::unique_ptr<fs::fsa::IFileSystem> fsa;
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R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT_UNLESS_R_SUCCEEDED(OpenHostFileSystemImpl(std::addressof(fsa), sf_path, MountHostOption::None), impl::HostRootFileSystemMountName, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST_ROOT()));
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/* Declare registration helper. */
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auto register_impl = [&]() -> Result {
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/* Allocate a new mountname generator. */
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auto generator = std::make_unique<HostRootCommonMountNameGenerator>();
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R_UNLESS(generator != nullptr, fs::ResultAllocationMemoryFailedInHostC());
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/* Register. */
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R_RETURN(fsa::Register(impl::HostRootFileSystemMountName, std::move(fsa), std::move(generator)));
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};
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/* Mount the filesystem. */
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AMS_FS_R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT(register_impl(), impl::HostRootFileSystemMountName, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST_ROOT()));
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/* Enable access logging. */
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AMS_FS_IMPL_ACCESS_LOG_FS_ACCESSOR_ENABLE(impl::HostRootFileSystemMountName);
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R_SUCCEED();
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}
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Result MountHostRoot(const MountHostOption &option) {
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/* Create host root path. */
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fssrv::sf::FspPath sf_path;
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sf_path.str[0] = 0;
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/* Open the filesystem. */
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std::unique_ptr<fs::fsa::IFileSystem> fsa;
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R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT_UNLESS_R_SUCCEEDED(OpenHostFileSystemImpl(std::addressof(fsa), sf_path, option), impl::HostRootFileSystemMountName, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST_ROOT_WITH_OPTION(option)));
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/* Declare registration helper. */
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auto register_impl = [&]() -> Result {
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/* Allocate a new mountname generator. */
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auto generator = std::make_unique<HostRootCommonMountNameGenerator>();
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R_UNLESS(generator != nullptr, fs::ResultAllocationMemoryFailedInHostC());
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/* Register. */
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R_RETURN(fsa::Register(impl::HostRootFileSystemMountName, std::move(fsa), std::move(generator)));
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};
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/* Mount the filesystem. */
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AMS_FS_R_TRY(AMS_FS_IMPL_ACCESS_LOG_MOUNT(register_impl(), impl::HostRootFileSystemMountName, AMS_FS_IMPL_ACCESS_LOG_FORMAT_MOUNT_HOST_ROOT_WITH_OPTION(option)));
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/* Enable access logging. */
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AMS_FS_IMPL_ACCESS_LOG_FS_ACCESSOR_ENABLE(impl::HostRootFileSystemMountName);
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R_SUCCEED();
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}
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void UnmountHostRoot() {
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return Unmount(impl::HostRootFileSystemMountName);
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}
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}
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