From 4e54b19793c752035409496200364bb47aa396a6 Mon Sep 17 00:00:00 2001
From: eversinc33 <svrath@web.de>
Date: Fri, 3 Jan 2025 21:02:06 +0100
Subject: [PATCH] check for windows NTFS compression on database files
---
src/blockchain_db/lmdb/db_lmdb.cpp | 64 ++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
diff --git a/src/blockchain_db/lmdb/db_lmdb.cpp b/src/blockchain_db/lmdb/db_lmdb.cpp
index d01119249..3fa8b99c9 100644
--- a/src/blockchain_db/lmdb/db_lmdb.cpp
+++ b/src/blockchain_db/lmdb/db_lmdb.cpp
@@ -28,11 +28,16 @@
#include "db_lmdb.h"
#include <boost/filesystem.hpp>
+#include <boost/filesystem/fstream.hpp>
#include <boost/format.hpp>
#include <boost/circular_buffer.hpp>
#include <memory> // std::unique_ptr
#include <cstring> // memcpy
+#ifdef WIN32
+#include <winioctl.h>
+#endif
+
#include "string_tools.h"
#include "file_io_utils.h"
#include "common/util.h"
@@ -1321,6 +1326,54 @@ BlockchainLMDB::BlockchainLMDB(bool batch_transactions): BlockchainDB()
m_hardfork = nullptr;
}
+#ifdef WIN32
+static bool disable_ntfs_compression(const boost::filesystem::path& filepath)
+{
+ DWORD file_attributes = ::GetFileAttributesW(filepath.c_str());
+ if (file_attributes == INVALID_FILE_ATTRIBUTES)
+ {
+ MERROR("Failed to get " << filepath.string() << " file attributes. Error: " << ::GetLastError());
+ return false;
+ }
+
+ if (!(file_attributes & FILE_ATTRIBUTE_COMPRESSED))
+ return true; // not compressed
+
+ LOG_PRINT_L1("Disabling NTFS compression for " << filepath.string());
+ HANDLE file_handle = ::CreateFileW(
+ filepath.c_str(),
+ GENERIC_READ | GENERIC_WRITE,
+ FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+ nullptr,
+ OPEN_EXISTING,
+ boost::filesystem::is_directory(filepath) ? FILE_FLAG_BACKUP_SEMANTICS : 0, // Needed to open handles to directories
+ nullptr
+ );
+
+ if (file_handle == INVALID_HANDLE_VALUE)
+ {
+ MERROR("Failed to open handle: " << filepath.string() << ". Error: " << ::GetLastError());
+ return false;
+ }
+
+ USHORT compression_state = COMPRESSION_FORMAT_NONE;
+ DWORD bytes_returned;
+ BOOL ok = ::DeviceIoControl(
+ file_handle,
+ FSCTL_SET_COMPRESSION,
+ &compression_state,
+ sizeof(compression_state),
+ nullptr,
+ 0,
+ &bytes_returned,
+ nullptr
+ );
+
+ ::CloseHandle(file_handle);
+ return ok;
+}
+#endif
+
void BlockchainLMDB::open(const std::string& filename, const int db_flags)
{
int result;
@@ -1347,6 +1400,17 @@ void BlockchainLMDB::open(const std::string& filename, const int db_flags)
throw DB_ERROR("Database could not be opened");
}
+#ifdef WIN32
+ // ensure NTFS compression is disabled on the directory and database file to avoid corruption of the blockchain
+ if (!disable_ntfs_compression(filename))
+ LOG_PRINT_L0("Failed to disable NTFS compression on folder: " << filename << ". Error: " << ::GetLastError());
+ boost::filesystem::path datafile(filename);
+ datafile /= CRYPTONOTE_BLOCKCHAINDATA_FILENAME;
+ boost::filesystem::ofstream(datafile).close(); // touch the file to ensure it exists
+ if (!disable_ntfs_compression(datafile))
+ throw DB_ERROR("Database file is NTFS compressend and compression could not be disabled");
+#endif
+
boost::optional<bool> is_hdd_result = tools::is_hdd(filename.c_str());
if (is_hdd_result)
{