mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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sysupdater: implement content meta mounting
This commit is contained in:
Michael Scire
SciresM
parent
28a6bb713c
commit
a6218ed814
7 changed files with 305 additions and 6 deletions
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@ -24,6 +24,7 @@
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#include <stratosphere/fs/fsa/fs_registrar.hpp>
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#include <stratosphere/fs/fs_remote_filesystem.hpp>
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#include <stratosphere/fs/fs_read_only_filesystem.hpp>
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#include <stratosphere/fs/fs_shared_filesystem_holder.hpp>
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#include <stratosphere/fs/fs_istorage.hpp>
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#include <stratosphere/fs/fs_substorage.hpp>
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#include <stratosphere/fs/fs_memory_storage.hpp>
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@ -0,0 +1,54 @@
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/*
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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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#pragma once
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#include <stratosphere/fs/fs_common.hpp>
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#include <stratosphere/fs/impl/fs_newable.hpp>
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#include <stratosphere/fs/fsa/fs_ifile.hpp>
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#include <stratosphere/fs/fsa/fs_idirectory.hpp>
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#include <stratosphere/fs/fsa/fs_ifilesystem.hpp>
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namespace ams::fs {
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class SharedFileSystemHolder : public fsa::IFileSystem, public impl::Newable {
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NON_COPYABLE(SharedFileSystemHolder);
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NON_MOVEABLE(SharedFileSystemHolder);
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private:
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std::shared_ptr<fsa::IFileSystem> fs;
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public:
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SharedFileSystemHolder(std::shared_ptr<fsa::IFileSystem> f) : fs(std::move(f)) { /* ... */ }
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public:
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virtual Result CreateFileImpl(const char *path, s64 size, int flags) override { return this->fs->CreateFile(path, size, flags); }
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virtual Result DeleteFileImpl(const char *path) override { return this->fs->DeleteFile(path); }
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virtual Result CreateDirectoryImpl(const char *path) override { return this->fs->CreateDirectory(path); }
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virtual Result DeleteDirectoryImpl(const char *path) override { return this->fs->DeleteDirectory(path); }
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virtual Result DeleteDirectoryRecursivelyImpl(const char *path) override { return this->fs->DeleteDirectoryRecursively(path); }
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virtual Result RenameFileImpl(const char *old_path, const char *new_path) override { return this->fs->RenameFile(old_path, new_path); }
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virtual Result RenameDirectoryImpl(const char *old_path, const char *new_path) override { return this->fs->RenameDirectory(old_path, new_path); }
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virtual Result GetEntryTypeImpl(fs::DirectoryEntryType *out, const char *path) override { return this->fs->GetEntryType(out, path); }
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virtual Result OpenFileImpl(std::unique_ptr<fs::fsa::IFile> *out_file, const char *path, fs::OpenMode mode) override { return this->fs->OpenFile(out_file, path, mode); }
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virtual Result OpenDirectoryImpl(std::unique_ptr<fs::fsa::IDirectory> *out_dir, const char *path, fs::OpenDirectoryMode mode) override { return this->fs->OpenDirectory(out_dir, path, mode); }
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virtual Result CommitImpl() override { return this->fs->Commit(); }
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virtual Result GetFreeSpaceSizeImpl(s64 *out, const char *path) override { return this->fs->GetFreeSpaceSize(out, path); }
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virtual Result GetTotalSpaceSizeImpl(s64 *out, const char *path) override { return this->fs->GetTotalSpaceSize(out, path); }
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virtual Result CleanDirectoryRecursivelyImpl(const char *path) override { return this->fs->CleanDirectoryRecursively(path); }
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/* These aren't accessible as commands. */
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virtual Result CommitProvisionallyImpl(s64 counter) override { return this->fs->CommitProvisionally(counter); }
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virtual Result RollbackImpl() override { return this->fs->Rollback(); }
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virtual Result FlushImpl() override { return this->fs->Flush(); }
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};
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}
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@ -78,6 +78,8 @@ namespace ams::fs {
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R_DEFINE_ERROR_RESULT(AllocationFailureInRomFsFileSystemA, 3247);
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R_DEFINE_ERROR_RESULT(AllocationFailureInRomFsFileSystemB, 3248);
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R_DEFINE_ERROR_RESULT(AllocationFailureInRomFsFileSystemC, 3249);
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R_DEFINE_ERROR_RESULT(AllocationFailureInFileSystemProxyCoreImplD, 3256);
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R_DEFINE_ERROR_RESULT(AllocationFailureInFileSystemProxyCoreImplE, 3257);
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R_DEFINE_ERROR_RESULT(AllocationFailureInPartitionFileSystemCreatorA, 3280);
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R_DEFINE_ERROR_RESULT(AllocationFailureInRomFileSystemCreatorA, 3281);
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R_DEFINE_ERROR_RESULT(AllocationFailureInStorageOnNcaCreatorA, 3288);
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@ -20,6 +20,54 @@
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namespace ams::util {
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template<typename T>
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constexpr T ToLower(T c) {
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return ('A' <= c && c <= 'Z') ? (c - 'A' + 'a') : c;
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}
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template<typename T>
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constexpr T ToUpper(T c) {
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return ('a' <= c && c <= 'z') ? (c - 'a' + 'A') : c;
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}
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template<typename T>
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int Strncmp(const T *lhs, const T *rhs, int count) {
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AMS_ASSERT(lhs != nullptr);
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AMS_ASSERT(rhs != nullptr);
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AMS_ABORT_UNLESS(count >= 0);
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if (count == 0) {
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return 0;
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}
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T l, r;
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do {
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l = *(lhs++);
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r = *(rhs++);
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} while (l && (l == r) && (--count));
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return l - r;
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}
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template<typename T>
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int Strnicmp(const T *lhs, const T *rhs, int count) {
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AMS_ASSERT(lhs != nullptr);
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AMS_ASSERT(rhs != nullptr);
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AMS_ABORT_UNLESS(count >= 0);
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if (count == 0) {
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return 0;
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}
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T l, r;
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do {
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l = ::ams::util::ToLower(*(lhs++));
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r = ::ams::util::ToLower(*(rhs++));
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} while (l && (l == r) && (--count));
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return l - r;
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}
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template<typename T>
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constexpr int Strlcpy(T *dst, const T *src, int count) {
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AMS_ASSERT(dst != nullptr);
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@ -88,8 +88,8 @@ void __appInit(void) {
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/* Initialize fssystem library. */
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fssystem::InitializeForFileSystemProxy();
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/* Configure ncm to use fssystem library to mount content. */
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ncm::SetMountContentMetaFunction(mitm::sysupdater::MountContentMeta);
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/* Configure ncm to use fssystem library to mount content from the sd card. */
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ncm::SetMountContentMetaFunction(mitm::sysupdater::MountSdCardContentMeta);
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ams::CheckApiVersion();
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}
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@ -18,9 +18,203 @@
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namespace ams::mitm::sysupdater {
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Result MountContentMeta(const char *mount_name, const char *path) {
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/* TODO: Implement */
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AMS_ABORT();
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namespace {
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constexpr inline const char * const NcaExtension = ".nca";
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constexpr inline const char * const NspExtension = ".nsp";
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constexpr inline const size_t NcaExtensionSize = 4;
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constexpr inline const size_t NspExtensionSize = 4;
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static_assert(NcaExtensionSize == NspExtensionSize);
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constexpr inline const size_t NcaNspExtensionSize = NcaExtensionSize;
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constexpr inline std::underlying_type<fssrv::PathNormalizer::Option>::type SdCardContentMetaPathNormalizeOption = fssrv::PathNormalizer::Option_PreserveTailSeparator |
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fssrv::PathNormalizer::Option_HasMountName;
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Result CheckNcaOrNsp(const char **path) {
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/* Ensure that the path is currently at the mount name delimeter. */
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R_UNLESS(std::strncmp(*path, ams::fs::impl::MountNameDelimiter, strnlen(ams::fs::impl::MountNameDelimiter, ams::fs::EntryNameLengthMax)) == 0, fs::ResultPathNotFound());
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/* Advance past the :. */
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static_assert(ams::fs::impl::MountNameDelimiter[0] == ':');
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*path += 1;
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/* Ensure path is long enough for the extension. */
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const auto path_len = strnlen(*path, ams::fs::EntryNameLengthMax);
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R_UNLESS(path_len > NcaNspExtensionSize, fs::ResultPathNotFound());
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/* Get the extension. */
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const char * const extension = *path + path_len - NcaNspExtensionSize;
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/* Ensure nca or nsp. */
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const bool is_nca = util::Strnicmp(extension, NcaExtension, NcaNspExtensionSize) == 0;
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const bool is_nsp = util::Strnicmp(extension, NspExtension, NcaNspExtensionSize) == 0;
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R_UNLESS(is_nca || is_nsp, fs::ResultPathNotFound());
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return ResultSuccess();
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}
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Result ParseMountName(const char **path, std::shared_ptr<ams::fs::fsa::IFileSystem> *out) {
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/* The equivalent function here supports all the common mount names; we'll only support the SD card. */
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if (const auto sd_mount_len = strnlen(ams::fs::impl::SdCardFileSystemMountName, ams::fs::MountNameLengthMax); std::strncmp(*path, ams::fs::impl::SdCardFileSystemMountName, sd_mount_len) == 0) {
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/* Open an sd card fs. */
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*path += sd_mount_len;
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/* Open the SD card. This uses libnx bindings. */
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FsFileSystem fs;
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R_TRY(fsOpenSdCardFileSystem(std::addressof(fs)));
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/* Allocate a new filesystem wrapper. */
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auto fsa = std::make_shared<ams::fs::RemoteFileSystem>(fs);
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R_UNLESS(fsa != nullptr, fs::ResultAllocationFailureInSdCardA());
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/* Set the output fs. */
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*out = std::move(fsa);
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} else {
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return fs::ResultPathNotFound();
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}
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/* Ensure that there's something that could be a mount name delimiter. */
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R_UNLESS(strnlen(*path, fs::EntryNameLengthMax) != 0, fs::ResultPathNotFound());
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return ResultSuccess();
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}
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Result ParseNsp(const char **path, std::shared_ptr<ams::fs::fsa::IFileSystem> *out, std::shared_ptr<ams::fs::fsa::IFileSystem> base_fs) {
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const char *work_path = *path;
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/* Advance to the nsp extension. */
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while (true) {
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if (util::Strnicmp(work_path, NspExtension, NspExtensionSize) == 0) {
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if (work_path[NspExtensionSize] == '\x00' || work_path[NspExtensionSize] == '/') {
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break;
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}
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work_path += NspExtensionSize;
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} else {
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R_UNLESS(*work_path != '\x00', fs::ResultPathNotFound());
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work_path += 1;
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}
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}
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/* Advance past the extension. */
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work_path += NspExtensionSize;
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/* Get the nsp path. */
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char nsp_path[fs::EntryNameLengthMax + 1];
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R_UNLESS(static_cast<size_t>(work_path - *path) <= sizeof(nsp_path), fs::ResultTooLongPath());
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std::memcpy(nsp_path, *path, work_path - *path);
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nsp_path[work_path - *path] = '\x00';
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/* Open the file storage. */
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std::shared_ptr<ams::fs::FileStorageBasedFileSystem> file_storage = fssystem::AllocateShared<ams::fs::FileStorageBasedFileSystem>();
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R_UNLESS(file_storage != nullptr, fs::ResultAllocationFailureInFileSystemProxyCoreImplD());
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R_TRY(file_storage->Initialize(std::move(base_fs), nsp_path, ams::fs::OpenMode_Read));
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/* Create a partition fs. */
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R_TRY(fssystem::GetFileSystemCreatorInterfaces()->partition_fs_creator->Create(out, std::move(file_storage)));
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/* Update the path. */
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*path = work_path;
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return ResultSuccess();
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}
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Result ParseNca(const char **path, std::shared_ptr<fssystem::NcaReader> *out, std::shared_ptr<ams::fs::fsa::IFileSystem> base_fs) {
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/* Open the file storage. */
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std::shared_ptr<ams::fs::FileStorageBasedFileSystem> file_storage = fssystem::AllocateShared<ams::fs::FileStorageBasedFileSystem>();
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R_UNLESS(file_storage != nullptr, fs::ResultAllocationFailureInFileSystemProxyCoreImplE());
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R_TRY(file_storage->Initialize(std::move(base_fs), *path, ams::fs::OpenMode_Read));
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/* Create the nca reader. */
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std::shared_ptr<fssystem::NcaReader> nca_reader;
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R_TRY(fssystem::GetFileSystemCreatorInterfaces()->storage_on_nca_creator->CreateNcaReader(std::addressof(nca_reader), file_storage));
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/* NOTE: Here Nintendo validates program ID, but this does not need checking in the meta case. */
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/* Set output reader. */
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*out = std::move(nca_reader);
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return ResultSuccess();
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}
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Result OpenMetaStorage(std::shared_ptr<ams::fs::IStorage> *out, std::shared_ptr<fssystem::NcaReader> nca_reader, fssystem::NcaFsHeader::FsType *out_fs_type) {
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/* Ensure the nca is a meta nca. */
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R_UNLESS(nca_reader->GetContentType() == fssystem::NcaHeader::ContentType::Meta, fs::ResultPreconditionViolation());
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/* We only support SD card ncas, so ensure this isn't a gamecard nca. */
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R_UNLESS(nca_reader->GetDistributionType() != fssystem::NcaHeader::DistributionType::GameCard, fs::ResultPermissionDenied());
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/* Here Nintendo would call GetPartitionIndex(), but we don't need to, because it's meta. */
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constexpr int MetaPartitionIndex = 0;
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/* Open fs header reader. */
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fssystem::NcaFsHeaderReader fs_header_reader;
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R_TRY(fssystem::GetFileSystemCreatorInterfaces()->storage_on_nca_creator->Create(out, std::addressof(fs_header_reader), std::move(nca_reader), MetaPartitionIndex, false));
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/* Set the output fs type. */
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*out_fs_type = fs_header_reader.GetFsType();
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return ResultSuccess();
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}
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Result OpenContentMetaFileSystem(std::shared_ptr<ams::fs::fsa::IFileSystem> *out, const char *path) {
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/* Parse the mount name to get a filesystem. */
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const char *cur_path = path;
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std::shared_ptr<ams::fs::fsa::IFileSystem> base_fs;
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R_TRY(ParseMountName(std::addressof(cur_path), std::addressof(base_fs)));
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/* Ensure the path is an nca or nsp. */
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R_TRY(CheckNcaOrNsp(std::addressof(cur_path)));
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/* Try to parse as nsp. */
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std::shared_ptr<ams::fs::fsa::IFileSystem> nsp_fs;
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if (R_SUCCEEDED(ParseNsp(std::addressof(cur_path), std::addressof(nsp_fs), base_fs))) {
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/* nsp target is only allowed for type package, and we're assuming type meta. */
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R_UNLESS(*path != '\x00', fs::ResultInvalidArgument());
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/* Use the nsp fs as the base fs. */
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base_fs = std::move(nsp_fs);
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}
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/* Parse as nca. */
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std::shared_ptr<fssystem::NcaReader> nca_reader;
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R_TRY(ParseNca(std::addressof(cur_path), std::addressof(nca_reader), std::move(base_fs)));
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/* Open meta storage. */
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std::shared_ptr<ams::fs::IStorage> storage;
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fssystem::NcaFsHeader::FsType fs_type;
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R_TRY(OpenMetaStorage(std::addressof(storage), std::move(nca_reader), std::addressof(fs_type)));
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/* Open the appropriate interface. */
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const auto * const creator_intfs = fssystem::GetFileSystemCreatorInterfaces();
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switch (fs_type) {
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case fssystem::NcaFsHeader::FsType::PartitionFs: return creator_intfs->partition_fs_creator->Create(out, std::move(storage));
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case fssystem::NcaFsHeader::FsType::RomFs: return creator_intfs->rom_fs_creator->Create(out, std::move(storage));
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default:
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return fs::ResultInvalidNcaFileSystemType();
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}
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}
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}
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Result MountSdCardContentMeta(const char *mount_name, const char *path) {
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/* Sanitize input. */
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/* NOTE: This is an internal API, so we won't bother with mount name sanitization. */
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R_UNLESS(path != nullptr, fs::ResultInvalidPath());
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/* Normalize the path. */
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fssrv::PathNormalizer normalized_path(path, SdCardContentMetaPathNormalizeOption);
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R_TRY(normalized_path.GetResult());
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/* Open the filesystem. */
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std::shared_ptr<ams::fs::fsa::IFileSystem> fs;
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R_TRY(OpenContentMetaFileSystem(std::addressof(fs), normalized_path.GetPath()));
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/* Create a holder for the fs. */
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std::unique_ptr unique_fs = std::make_unique<ams::fs::SharedFileSystemHolder>(std::move(fs));
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R_UNLESS(unique_fs != nullptr, fs::ResultAllocationFailureInNew());
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/* Register the fs. */
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return ams::fs::fsa::Register(mount_name, std::move(unique_fs));
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}
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}
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@ -18,6 +18,6 @@
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namespace ams::mitm::sysupdater {
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Result MountContentMeta(const char *mount_name, const char *path);
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Result MountSdCardContentMeta(const char *mount_name, const char *path);
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}
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