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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
This commit is contained in:
Morph 2020-07-05 09:37:50 -04:00
parent 263200f982
commit a82fdea1ac
2 changed files with 84 additions and 14 deletions
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88
src/core/file_sys/registered_cache.cpp
View File

@ -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;
}

8
src/core/file_sys/registered_cache.h
View File

@ -34,6 +34,7 @@ using VfsCopyFunction = std::function<bool(const VirtualFile&, const VirtualFile
enum class InstallResult {
Success,
OverwriteExisting,
ErrorAlreadyExists,
ErrorCopyFailed,
ErrorMetaFailed,
@ -132,8 +133,8 @@ public:
// Parsing function defines the conversion from raw file to NCA. If there are other steps
// besides creating the NCA from the file (e.g. NAX0 on SD Card), that should go in a custom
// parsing function.
explicit RegisteredCache(VirtualDir dir,
ContentProviderParsingFunction parsing_function =
explicit RegisteredCache(
VirtualDir dir, ContentProviderParsingFunction parsing_function =
[](const VirtualFile& file, const NcaID& id) { return file; });
~RegisteredCache() override;
@ -154,6 +155,9 @@ public:
std::optional<TitleType> title_type = {}, std::optional<ContentRecordType> record_type = {},
std::optional<u64> 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,