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Use early return

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Blue 2025-12-03 12:58:34 -08:00
parent f8e2119aa6
commit c69c83b0ab
1 changed files with 57 additions and 58 deletions
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115
src/windows/wslaservice/exe/WSLASession.cpp
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@ -118,68 +118,67 @@ WSLASession::~WSLASession()
void WSLASession::ConfigureStorage(const WSLA_SESSION_SETTINGS& Settings)
{
if (Settings.StoragePath != nullptr)
{
std::filesystem::path storagePath{Settings.StoragePath};
THROW_HR_IF_MSG(E_INVALIDARG, !storagePath.is_absolute(), "Storage path is not absolute: %ls", storagePath.c_str());
m_storageVhdPath = storagePath / "storage.vhdx";
std::string diskDevice;
std::optional<ULONG> diskLun{};
bool vhdCreated = false;
auto deleteVhdOnFailure = wil::scope_exit_log(WI_DIAGNOSTICS_INFO, [&]() {
if (vhdCreated)
{
if (diskLun.has_value())
{
m_virtualMachine->DetachDisk(diskLun.value());
}
auto runAsUser = wil::CoImpersonateClient();
LOG_IF_WIN32_BOOL_FALSE(DeleteFileW(m_storageVhdPath.c_str()));
}
});
auto result =
wil::ResultFromException([&]() { diskDevice = m_virtualMachine->AttachDisk(m_storageVhdPath.c_str(), false).second; });
if (FAILED(result))
{
THROW_HR_IF_MSG(
result,
result != HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND) && result != HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND),
"Failed to attach vhd: %ls",
m_storageVhdPath.c_str());
// If the VHD wasn't found, create it.
WSL_LOG("CreateStorageVhd", TraceLoggingValue(m_storageVhdPath.c_str(), "StorageVhdPath"));
auto runAsUser = wil::CoImpersonateClient();
std::filesystem::create_directories(storagePath);
wsl::core::filesystem::CreateVhd(
m_storageVhdPath.c_str(), Settings.MaximumStorageSizeMb * _1MB, m_userSession->GetUserSid(), false, false);
vhdCreated = true;
// Then attach the new disk.
std::tie(diskLun, diskDevice) = m_virtualMachine->AttachDisk(m_storageVhdPath.c_str(), false);
// Then format it.
Ext4Format(diskDevice);
}
// Mount the device to /root.
m_virtualMachine->Mount(diskDevice.c_str(), "/root", "ext4", "", 0);
deleteVhdOnFailure.release();
}
else
if (Settings.StoragePath == nullptr)
{
// If no storage path is specified, use a tmpfs for convenience.
m_virtualMachine->Mount("", "/root", "tmpfs", "", 0);
return;
}
std::filesystem::path storagePath{Settings.StoragePath};
THROW_HR_IF_MSG(E_INVALIDARG, !storagePath.is_absolute(), "Storage path is not absolute: %ls", storagePath.c_str());
m_storageVhdPath = storagePath / "storage.vhdx";
std::string diskDevice;
std::optional<ULONG> diskLun{};
bool vhdCreated = false;
auto deleteVhdOnFailure = wil::scope_exit_log(WI_DIAGNOSTICS_INFO, [&]() {
if (vhdCreated)
{
if (diskLun.has_value())
{
m_virtualMachine->DetachDisk(diskLun.value());
}
auto runAsUser = wil::CoImpersonateClient();
LOG_IF_WIN32_BOOL_FALSE(DeleteFileW(m_storageVhdPath.c_str()));
}
});
auto result =
wil::ResultFromException([&]() { diskDevice = m_virtualMachine->AttachDisk(m_storageVhdPath.c_str(), false).second; });
if (FAILED(result))
{
THROW_HR_IF_MSG(
result,
result != HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND) && result != HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND),
"Failed to attach vhd: %ls",
m_storageVhdPath.c_str());
// If the VHD wasn't found, create it.
WSL_LOG("CreateStorageVhd", TraceLoggingValue(m_storageVhdPath.c_str(), "StorageVhdPath"));
auto runAsUser = wil::CoImpersonateClient();
std::filesystem::create_directories(storagePath);
wsl::core::filesystem::CreateVhd(
m_storageVhdPath.c_str(), Settings.MaximumStorageSizeMb * _1MB, m_userSession->GetUserSid(), false, false);
vhdCreated = true;
// Then attach the new disk.
std::tie(diskLun, diskDevice) = m_virtualMachine->AttachDisk(m_storageVhdPath.c_str(), false);
// Then format it.
Ext4Format(diskDevice);
}
// Mount the device to /root.
m_virtualMachine->Mount(diskDevice.c_str(), "/root", "ext4", "", 0);
deleteVhdOnFailure.release();
}
HRESULT WSLASession::GetDisplayName(LPWSTR* DisplayName)