From a82fdea1ac84693288ed5656f3ff89ceaaaeea1b Mon Sep 17 00:00:00 2001 From: Morph <39850852+Morph1984@users.noreply.github.com> Date: Sun, 5 Jul 2020 09:37:50 -0400 Subject: [PATCH] registered_cache: Remove previous update/dlc if it exists on install - This checks for and removes old updates or dlc based on title id. If a content meta nca exists within the registered cache, it will attempt to remove all the ncas associated with the content meta before installing a new update/dlc --- src/core/file_sys/registered_cache.cpp | 88 ++++++++++++++++++++++---- src/core/file_sys/registered_cache.h | 10 ++- 2 files changed, 84 insertions(+), 14 deletions(-) diff --git a/src/core/file_sys/registered_cache.cpp b/src/core/file_sys/registered_cache.cpp index 27c1b0233..39bfbdfd3 100644 --- a/src/core/file_sys/registered_cache.cpp +++ b/src/core/file_sys/registered_cache.cpp @@ -547,6 +547,57 @@ InstallResult RegisteredCache::InstallEntry(const XCI& xci, bool overwrite_if_ex return InstallEntry(*xci.GetSecurePartitionNSP(), overwrite_if_exists, copy); } +bool RegisteredCache::RemoveExistingEntry(const u64 title_id) { + const auto delete_nca = [this](const NcaID& id) { + const auto path = GetRelativePathFromNcaID(id, false, true, false); + + if (dir->GetFileRelative(path) == nullptr) { + return false; + } + + Core::Crypto::SHA256Hash hash{}; + mbedtls_sha256_ret(id.data(), id.size(), hash.data(), 0); + const auto dirname = fmt::format("000000{:02X}", hash[0]); + + const auto dir2 = GetOrCreateDirectoryRelative(dir, dirname); + + const auto res = dir2->DeleteFile(fmt::format("{}.nca", Common::HexToString(id, false))); + + return res; + }; + + // Get the Content Provider + const auto& installed = Core::System::GetInstance().GetContentProvider(); + // If an update exists, remove + if (installed.HasEntry(title_id, ContentRecordType::Meta)) { + LOG_INFO(Loader, + "Previous Update (v{}) for title_id={:016X} detected! Attempting to remove...", + installed.GetEntryVersion(title_id).value_or(0), title_id); + // Get all the ncas associated with the current update CNMT and delete them + const auto& meta_old_id = + GetNcaIDFromMetadata(title_id, ContentRecordType::Meta).value_or(NcaID{}); + const auto& program_id = + GetNcaIDFromMetadata(title_id, ContentRecordType::Program).value_or(NcaID{}); + const auto& data_id = + GetNcaIDFromMetadata(title_id, ContentRecordType::Data).value_or(NcaID{}); + const auto& control_id = + GetNcaIDFromMetadata(title_id, ContentRecordType::Control).value_or(NcaID{}); + const auto& html_id = + GetNcaIDFromMetadata(title_id, ContentRecordType::HtmlDocument).value_or(NcaID{}); + const auto& legal_id = + GetNcaIDFromMetadata(title_id, ContentRecordType::LegalInformation).value_or(NcaID{}); + + delete_nca(meta_old_id); + delete_nca(program_id); + delete_nca(data_id); + delete_nca(control_id); + delete_nca(html_id); + delete_nca(legal_id); + return true; + } + return false; +} + InstallResult RegisteredCache::InstallEntry(const NSP& nsp, bool overwrite_if_exists, const VfsCopyFunction& copy) { const auto ncas = nsp.GetNCAsCollapsed(); @@ -560,31 +611,44 @@ InstallResult RegisteredCache::InstallEntry(const NSP& nsp, bool overwrite_if_ex return InstallResult::ErrorMetaFailed; } - // Install Metadata File const auto meta_id_raw = (*meta_iter)->GetName().substr(0, 32); const auto meta_id = Common::HexStringToArray<16>(meta_id_raw); - const auto res = RawInstallNCA(**meta_iter, copy, overwrite_if_exists, meta_id); - if (res != InstallResult::Success) - return res; - - // Install all the other NCAs const auto section0 = (*meta_iter)->GetSubdirectories()[0]; const auto cnmt_file = section0->GetFiles()[0]; const CNMT cnmt(cnmt_file); + + // Get the title id stored within the CNMT + const auto title_id = cnmt.GetTitleID(); + // Removes an entry if it exists + const auto result = RemoveExistingEntry(title_id); + + // Install Metadata File + const auto res = RawInstallNCA(**meta_iter, copy, overwrite_if_exists, meta_id); + if (res != InstallResult::Success) { + return res; + } + + // Install all the other NCAs for (const auto& record : cnmt.GetContentRecords()) { // Ignore DeltaFragments, they are not useful to us - if (record.type == ContentRecordType::DeltaFragment) + if (record.type == ContentRecordType::DeltaFragment) { continue; + } const auto nca = GetNCAFromNSPForID(nsp, record.nca_id); - if (nca == nullptr) + if (nca == nullptr) { return InstallResult::ErrorCopyFailed; + } const auto res2 = RawInstallNCA(*nca, copy, overwrite_if_exists, record.nca_id); - if (res2 != InstallResult::Success) + if (res2 != InstallResult::Success) { return res2; + } } Refresh(); + if (result) { + return InstallResult::ErrorAlreadyExists; + } return InstallResult::Success; } @@ -610,8 +674,9 @@ InstallResult RegisteredCache::InstallEntry(const NCA& nca, TitleType type, mbedtls_sha256_ret(data.data(), data.size(), c_rec.hash.data(), 0); memcpy(&c_rec.nca_id, &c_rec.hash, 16); const CNMT new_cnmt(header, opt_header, {c_rec}, {}); - if (!RawInstallYuzuMeta(new_cnmt)) + if (!RawInstallYuzuMeta(new_cnmt)) { return InstallResult::ErrorMetaFailed; + } return RawInstallNCA(nca, copy, overwrite_if_exists, c_rec.nca_id); } @@ -649,8 +714,9 @@ InstallResult RegisteredCache::RawInstallNCA(const NCA& nca, const VfsCopyFuncti } auto out = dir->CreateFileRelative(path); - if (out == nullptr) + if (out == nullptr) { return InstallResult::ErrorCopyFailed; + } return copy(in, out, VFS_RC_LARGE_COPY_BLOCK) ? InstallResult::Success : InstallResult::ErrorCopyFailed; } diff --git a/src/core/file_sys/registered_cache.h b/src/core/file_sys/registered_cache.h index f339cd17b..8598f0543 100644 --- a/src/core/file_sys/registered_cache.h +++ b/src/core/file_sys/registered_cache.h @@ -34,6 +34,7 @@ using VfsCopyFunction = std::function title_type = {}, std::optional record_type = {}, std::optional title_id = {}) const override; + // Removes an existing entry based on title id + bool RemoveExistingEntry(const u64 title_id); + // Raw copies all the ncas from the xci/nsp to the csache. Does some quick checks to make sure // there is a meta NCA and all of them are accessible. InstallResult InstallEntry(const XCI& xci, bool overwrite_if_exists = false,