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feat(reflink): ioctl_clone for winbtrfs & ReFS

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Signed-off-by: Rachel Powers <508861+Ryex@users.noreply.github.com>
This commit is contained in:
Rachel Powers 2023-02-10 16:41:48 -08:00
parent 1210c3256d
commit 9939367db7
2 changed files with 334 additions and 32 deletions
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356
launcher/FileSystem.cpp
View File

@ -59,6 +59,7 @@
#include "StringUtils.h"
#if defined Q_OS_WIN32
#define NOMINMAX
#define WIN32_LEAN_AND_MEAN
#include <objbase.h>
#include <objidl.h>
@ -113,6 +114,7 @@ namespace fs = ghc::filesystem;
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#include <fileapi.h>
// refs
#include <winioctl.h>
#endif
@ -953,14 +955,13 @@ FilesystemInfo statFS(const QString& path)
QStorageInfo storage_info(NearestExistentAncestor(path));
QString fsTypeName = QString::fromStdString(storage_info.fileSystemType().toStdString());
qDebug() << "Qt reports Filesystem at" << path << "root:" << storage_info.rootPath() << "as" << fsTypeName;
info.fsTypeName = QString::fromStdString(storage_info.fileSystemType().toStdString());
for (auto fs_type_pair : s_filesystem_type_names_inverse.toStdMap()) {
auto fs_type_name = fs_type_pair.first;
auto fs_type = fs_type_pair.second;
if(fsTypeName.toLower().contains(fs_type_name.toLower())) {
if(info.fsTypeName.toLower().contains(fs_type_name.toLower())) {
info.fsType = fs_type;
break;
}
@ -1043,7 +1044,7 @@ bool clone::operator()(const QString& offset, bool dryRun)
clone_file(src_path, dst_path, err);
}
if (err) {
qWarning() << "Failed to clone files:" << QString::fromStdString(err.message());
qDebug() << "Failed to clone files:" << QString::fromStdString(err.message());
qDebug() << "Source file:" << src_path;
qDebug() << "Destination file:" << dst_path;
}
@ -1082,8 +1083,23 @@ bool clone_file(const QString& src, const QString& dst, std::error_code& ec)
#if defined(Q_OS_WIN)
FilesystemInfo srcinfo = statFS(src);
if (srcinfo.fsType == FilesystemType::BTRFS) {
FilesystemInfo dstinfo = statFS(dst);
FilesystemInfo dstinfo = statFS(dst);
if (((srcinfo.fsType == FilesystemType::BTRFS && dstinfo.fsType == FilesystemType::BTRFS) ||
(srcinfo.fsType == FilesystemType::REFS && dstinfo.fsType == FilesystemType::REFS)) &&
USE_IOCTL_CLONE)
{
if (srcinfo.rootPath != dstinfo.rootPath) {
qWarning() << "clones must be to the same device! src and dst root paths do not match.";
ec = std::make_error_code(std::errc::not_supported);
return false;
}
qDebug() << "ioctl clone" << src << "to" << dst;
if (!ioctl_clone(src_path, dst_path, ec))
return false;
} else if (srcinfo.fsType == FilesystemType::BTRFS) {
if (dstinfo.fsType != FilesystemType::BTRFS || (srcinfo.rootPath != dstinfo.rootPath)){
qWarning() << "winbtrfs clone must be to the same device! src and dst root paths do not match.";
qWarning() << "check out https://github.com/maharmstone/btrfs for btrfs support!";
@ -1091,12 +1107,12 @@ bool clone_file(const QString& src, const QString& dst, std::error_code& ec)
return false;
}
qWarning() << "clone/reflink of btrfs on windows! assuming winbtrfs is in use and calling shellbtrfs.dll via rundll32.exe";
qDebug() << "clone/reflink of btrfs on windows! assuming winbtrfs is in use and calling shellbtrfs.dll,ReflinkCopyW";
if (!winbtrfs_clone(src_path, dst_path, ec))
return false;
// There is no return value from rundll32.exe so we must check if the file exsists ourselves
// There is no return value from ReflinkCopyW so we must check if the file exsists ourselves
QFileInfo dstInfo(dst);
if (!dstInfo.exists() || !dstInfo.isFile() || dstInfo.isSymLink()) {
@ -1116,16 +1132,24 @@ bool clone_file(const QString& src, const QString& dst, std::error_code& ec)
}
} else {
// oof, clone failure?
qWarning() << "clone/reflink on winbtrfs did not succeed: file" << dst << "does not appear to exsist";
qDebug() << "clone/reflink on winbtrfs did not succeed: file" << dst << "does not appear to exist";
ec = std::make_error_code(std::errc::no_such_file_or_directory);
return false;
}
}
} else if (srcinfo.fsType == FilesystemType::REFS) {
qWarning() << "clone/reflink not yet supported on windows ReFS!";
ec = std::make_error_code(std::errc::not_supported);
return false;
if (dstinfo.fsType != FilesystemType::REFS || (srcinfo.rootPath != dstinfo.rootPath)){
qWarning() << "ReFS clone must be to the same device! src and dst root paths do not match.";
ec = std::make_error_code(std::errc::not_supported);
return false;
}
qDebug() << "clone/reflink of ReFS on windows!";
if (!refs_clone(src_path, dst_path, ec))
return false;
} else {
qWarning() << "clone/reflink not supported on windows outside of winbtrfs or ReFS!";
qWarning() << "check out https://github.com/maharmstone/btrfs for btrfs support!";
@ -1154,6 +1178,14 @@ bool clone_file(const QString& src, const QString& dst, std::error_code& ec)
#if defined(Q_OS_WIN)
typedef void (__stdcall *f_ReflinkCopyW)(HWND hwnd, HINSTANCE hinst, LPWSTR lpszCmdLine, int nCmdShow);
const long WinMaxChunkSize = 1L << 31; // 2GB
static long RoundUpToPowerOf2(long originalValue, long roundingMultiplePowerOf2)
{
long mask = roundingMultiplePowerOf2 - 1;
return (originalValue + mask) & ~mask;
}
bool winbtrfs_clone(const std::wstring& src_path, const std::wstring& dst_path, std::error_code& ec)
{
// https://github.com/maharmstone/btrfs
@ -1194,33 +1226,118 @@ bool refs_clone(const std::wstring& src_path, const std::wstring& dst_path, std:
#if defined(FSCTL_DUPLICATE_EXTENTS_TO_FILE)
//https://learn.microsoft.com/en-us/windows/win32/api/winioctl/ni-winioctl-fsctl_duplicate_extents_to_file
//https://github.com/microsoft/CopyOnWrite/blob/main/lib/Windows/WindowsCopyOnWriteFilesystem.cs#L94
std::wstring existingFile = src_path.c_str();
std::wstring newLink = dst_path.c_str();
QString qSourcePath = StringUtils::fromStdString(src_path);
QString sourceVolumePath = statFS(qSourcePath).rootPath;
std::wstring source_volume_path = StringUtils::toStdString(sourceVolumePath);
unsigned long sectorsPerCluster;
unsigned long bytesPerSector;
unsigned long numberOfFreeClusters;
unsigned long totalNumberOfClusters;
if(!GetDiskFreeSpace(source_volume_path.c_str(), &sectorsPerCluster, &bytesPerSector, &numberOfFreeClusters, &totalNumberOfClusters )){
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to get disk info for source volume" << sourceVolumePath;
return false;
}
long srcClusterSize = (long)(sectorsPerCluster * bytesPerSector);
HANDLE hExistingFile = CreateFile(src_path.c_str(), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
if (hExistingFile == INVALID_HANDLE_VALUE)
HANDLE hSourceFile = CreateFile(src_path.c_str(), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
if (hSourceFile == INVALID_HANDLE_VALUE)
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to open source file" << src_path.c_str();
return false;
}
HANDLE hNewFile = CreateFile(dst_path.c_str(), GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, 0, NULL);
if (hNewFile == INVALID_HANDLE_VALUE)
HANDLE hDestFile = CreateFile(dst_path.c_str(), GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, 0, NULL);
if (hDestFile == INVALID_HANDLE_VALUE)
{
CloseHandle(hExistingFile);
ec = std::error_code(GetLastError(), std::system_category());
CloseHandle(hSourceFile);
qDebug() << "Failed to open dest file" << dst_path.c_str();
return false;
}
DWORD bytesReturned;
DWORD bytesReturned = 0;
// FIXME: ReFS requires that cloned regions reside on a disk cluster boundary.
// FIXME: ERROR_BLOCK_TOO_MANY_REFERENCES can occure https://docs.microsoft.com/en-us/windows-server/storage/refs/block-cloning#functionality-restrictions-and-remarks
BOOL result = DeviceIoControl(hExistingFile, FSCTL_DUPLICATE_EXTENTS_TO_FILE, hNewFile, sizeof(hNewFile), NULL, 0, &bytesReturned, NULL);
// Set the destination to be sparse while we clone.
// Important to avoid allocating zero-backed real storage when calling SetFileInformationByHandle()
// below which will just be released when cloning file extents.
if (!DeviceIoControl(hDestFile, FSCTL_SET_SPARSE, nullptr, 0, nullptr, 0, &bytesReturned, nullptr)) {
qDebug() << "Failed to set file sparseness for destination file" << dst_path.c_str();
ec = std::error_code(GetLastError(), std::system_category());
return false;
}
CloseHandle(hNewFile);
CloseHandle(hExistingFile);
LARGE_INTEGER sourceFileLengthStruct;
if (!GetFileSizeEx(hSourceFile, &sourceFileLengthStruct)) {
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to get file info for source file" << src_path.c_str();
return false;
}
return (result != 0);
long sourceFileLength = sourceFileLengthStruct.QuadPart;
// Set the destination on-disk size the same as the source.
FILE_END_OF_FILE_INFO fileSizeInfo{sourceFileLength};
if (!SetFileInformationByHandle(hDestFile, FILE_INFO_BY_HANDLE_CLASS::FileEndOfFileInfo,
&fileSizeInfo, sizeof(FILE_END_OF_FILE_INFO)))
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to set end of file on destination file" << dst_path.c_str();
return false;
}
DUPLICATE_EXTENTS_DATA duplicateExtentsData = DUPLICATE_EXTENTS_DATA{ hSourceFile };
long fileSizeRoundedUpToClusterBoundary = RoundUpToPowerOf2(sourceFileLength, srcClusterSize);
long sourceOffset = 0;
while(sourceOffset < sourceFileLength)
{
duplicateExtentsData.SourceFileOffset.QuadPart = sourceOffset;
duplicateExtentsData.TargetFileOffset.QuadPart = sourceOffset;
long thisChunkSize = std::min(fileSizeRoundedUpToClusterBoundary - sourceOffset, WinMaxChunkSize);
duplicateExtentsData.ByteCount.QuadPart = thisChunkSize;
DWORD numBytesReturned = 0;
bool ioctlResult = DeviceIoControl(
hDestFile,
FSCTL_DUPLICATE_EXTENTS_TO_FILE,
&duplicateExtentsData,
sizeof(DUPLICATE_EXTENTS_DATA),
nullptr,
0,
&numBytesReturned,
nullptr);
if (!ioctlResult)
{
DWORD err = GetLastError();
ec = std::error_code(err, std::system_category());
QString additionalMessage;
if (err == ERROR_BLOCK_TOO_MANY_REFERENCES)
{
static const int MaxClonesPerFile = 8175;
additionalMessage = QString(
" This is ERROR_BLOCK_TOO_MANY_REFERENCES and may mean you have surpassed the maximum "
"allowed %1 references for a single file. "
"See https://docs.microsoft.com/en-us/windows-server/storage/refs/block-cloning#functionality-restrictions-and-remarks"
).arg(MaxClonesPerFile);
}
qWarning() << "Failed copy-on-write cloning from source file" << src_path.c_str() << "to" << dst_path.c_str() << "." << additionalMessage;
return false;
}
sourceOffset += thisChunkSize;
}
CloseHandle(hDestFile);
CloseHandle(hSourceFile);
return true;
#else
ec = std::make_error_code(std::errc::not_supported);
qWarning() << "not built with refs support";
@ -1228,6 +1345,181 @@ bool refs_clone(const std::wstring& src_path, const std::wstring& dst_path, std:
#endif
}
bool ioctl_clone(const std::wstring& src_path, const std::wstring& dst_path, std::error_code& ec)
{
/**
* This algorithm inspired from https://github.com/0xbadfca11/reflink
* LICENSE MIT
*
*/
HANDLE hSourceFile = CreateFileW(src_path.c_str(), GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, 0, nullptr);
if (hSourceFile == INVALID_HANDLE_VALUE)
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to open source file" << src_path.c_str();
return false;
}
ULONG fs_flags;
if (!GetVolumeInformationByHandleW(hSourceFile, nullptr, 0, nullptr, nullptr, &fs_flags, nullptr, 0))
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to get Filesystem information for " << src_path.c_str();
CloseHandle(hSourceFile);
return false;
}
if (!(fs_flags & FILE_SUPPORTS_BLOCK_REFCOUNTING))
{
SetLastError(ERROR_NOT_CAPABLE);
ec = std::error_code(GetLastError(), std::system_category());
qWarning() << "Filesystem at " << src_path.c_str() << " does not support reflink";
CloseHandle(hSourceFile);
return false;
}
FILE_END_OF_FILE_INFO sourceFileLength;
if (!GetFileSizeEx(hSourceFile, &sourceFileLength.EndOfFile))
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to size of source file" << src_path.c_str();
CloseHandle(hSourceFile);
return false;
}
FILE_BASIC_INFO sourceFileBasicInfo;
if (!GetFileInformationByHandleEx(hSourceFile, FileBasicInfo, &sourceFileBasicInfo, sizeof(sourceFileBasicInfo)))
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to source file info" << src_path.c_str();
CloseHandle(hSourceFile);
return false;
}
ULONG junk;
FSCTL_GET_INTEGRITY_INFORMATION_BUFFER sourceFileIntegrity;
if (!DeviceIoControl(hSourceFile, FSCTL_GET_INTEGRITY_INFORMATION, nullptr, 0, &sourceFileIntegrity, sizeof(sourceFileIntegrity), &junk, nullptr))
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to source file integrity info" << src_path.c_str();
CloseHandle(hSourceFile);
return false;
}
HANDLE hDestFile = CreateFileW(dst_path.c_str(), GENERIC_READ | GENERIC_WRITE | DELETE, 0, nullptr, CREATE_NEW, 0, hSourceFile);
if (hDestFile == INVALID_HANDLE_VALUE)
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to open dest file" << dst_path.c_str();
CloseHandle(hSourceFile);
return false;
}
FILE_DISPOSITION_INFO destFileDispose = { TRUE };
if (!SetFileInformationByHandle(hDestFile, FileDispositionInfo, &destFileDispose, sizeof(destFileDispose)))
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to set dest file info" << dst_path.c_str();
CloseHandle(hSourceFile);
CloseHandle(hDestFile);
return false;
}
if (!DeviceIoControl(hDestFile, FSCTL_SET_SPARSE, nullptr, 0, nullptr, 0, &junk, nullptr))
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to set dest sparseness" << dst_path.c_str();
CloseHandle(hSourceFile);
CloseHandle(hDestFile);
return false;
}
FSCTL_SET_INTEGRITY_INFORMATION_BUFFER setDestFileintegrity = { sourceFileIntegrity.ChecksumAlgorithm, sourceFileIntegrity.Reserved, sourceFileIntegrity.Flags };
if (!DeviceIoControl(hDestFile, FSCTL_SET_INTEGRITY_INFORMATION, &setDestFileintegrity, sizeof(setDestFileintegrity), nullptr, 0, nullptr, nullptr))
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to set dest file integrity info" << dst_path.c_str();
CloseHandle(hSourceFile);
CloseHandle(hDestFile);
return false;
}
if (!SetFileInformationByHandle(hDestFile, FileEndOfFileInfo, &sourceFileLength, sizeof(sourceFileLength)))
{
ec = std::error_code(GetLastError(), std::system_category());
qDebug() << "Failed to set dest file size" << dst_path.c_str();
CloseHandle(hSourceFile);
CloseHandle(hDestFile);
return false;
}
const LONG64 splitThreshold = (1LL << 32) - sourceFileIntegrity.ClusterSizeInBytes;
DUPLICATE_EXTENTS_DATA dupExtent;
dupExtent.FileHandle = hSourceFile;
for (LONG64 offset = 0, remain = RoundUpToPowerOf2(sourceFileLength.EndOfFile.QuadPart, sourceFileIntegrity.ClusterSizeInBytes); remain > 0; offset += splitThreshold, remain -= splitThreshold)
{
dupExtent.SourceFileOffset.QuadPart = dupExtent.TargetFileOffset.QuadPart = offset;
dupExtent.ByteCount.QuadPart = std::min(splitThreshold, remain);
_ASSERTE(dupExtent.SourceFileOffset.QuadPart % sourceFileIntegrity.ClusterSizeInBytes == 0);
_ASSERTE(dupExtent.ByteCount.QuadPart % sourceFileIntegrity.ClusterSizeInBytes == 0);
_ASSERTE(dupExtent.ByteCount.QuadPart <= UINT32_MAX);
_RPT3(_CRT_WARN, "Remain=%llx\nOffset=%llx\nLength=%llx\n\n", remain, dupExtent.SourceFileOffset.QuadPart, dupExtent.ByteCount.QuadPart);
if (!DeviceIoControl(hDestFile, FSCTL_DUPLICATE_EXTENTS_TO_FILE, &dupExtent, sizeof(dupExtent), nullptr, 0, &junk, nullptr))
{
DWORD err = GetLastError();
QString additionalMessage;
if (err == ERROR_BLOCK_TOO_MANY_REFERENCES)
{
static const int MaxClonesPerFile = 8175;
additionalMessage = QString(
" This is ERROR_BLOCK_TOO_MANY_REFERENCES and may mean you have surpassed the maximum "
"allowed %1 references for a single file. "
"See https://docs.microsoft.com/en-us/windows-server/storage/refs/block-cloning#functionality-restrictions-and-remarks"
).arg(MaxClonesPerFile);
}
ec = std::error_code(err, std::system_category());
qDebug() << "Failed copy-on-write cloning of" << src_path.c_str() << "to" << dst_path.c_str() << "with error" << err << additionalMessage;
CloseHandle(hSourceFile);
CloseHandle(hDestFile);
return false;
}
}
if (!(sourceFileBasicInfo.FileAttributes & FILE_ATTRIBUTE_SPARSE_FILE))
{
FILE_SET_SPARSE_BUFFER setDestSparse = { FALSE };
if (!DeviceIoControl(hDestFile, FSCTL_SET_SPARSE, &setDestSparse, sizeof(setDestSparse), nullptr, 0, &junk, nullptr))
{
qDebug() << "Failed to set dest file sparseness" << dst_path.c_str();
CloseHandle(hSourceFile);
CloseHandle(hDestFile);
return false;
}
}
sourceFileBasicInfo.CreationTime.QuadPart = 0;
if (!SetFileInformationByHandle(hDestFile, FileBasicInfo, &sourceFileBasicInfo, sizeof(sourceFileBasicInfo)))
{
qDebug() << "Failed to set dest file creation time" << dst_path.c_str();
CloseHandle(hSourceFile);
CloseHandle(hDestFile);
return false;
}
if (!FlushFileBuffers(hDestFile))
{
qDebug() << "Failed to flush dest file buffer" << dst_path.c_str();
CloseHandle(hSourceFile);
CloseHandle(hDestFile);
return false;
}
destFileDispose = { FALSE };
bool result = !!SetFileInformationByHandle(hDestFile, FileDispositionInfo, &destFileDispose, sizeof(destFileDispose));
CloseHandle(hSourceFile);
CloseHandle(hDestFile);
return result;
}
#elif defined(Q_OS_LINUX)
bool linux_ficlone(const std::string& src_path, const std::string& dst_path, std::error_code& ec)
@ -1236,14 +1528,14 @@ bool linux_ficlone(const std::string& src_path, const std::string& dst_path, std
int src_fd = open(src_path.c_str(), O_RDONLY);
if(src_fd == -1) {
qWarning() << "Failed to open file:" << src_path.c_str();
qDebug() << "Failed to open file:" << src_path.c_str();
qDebug() << "Error:" << strerror(errno);
ec = std::make_error_code(static_cast<std::errc>(errno));
return false;
}
int dst_fd = open(dst_path.c_str(), O_CREAT | O_WRONLY | O_TRUNC, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
if(dst_fd == -1) {
qWarning() << "Failed to open file:" << dst_path.c_str();
qDebug() << "Failed to open file:" << dst_path.c_str();
qDebug() << "Error:" << strerror(errno);
ec = std::make_error_code(static_cast<std::errc>(errno));
close(src_fd);
@ -1251,7 +1543,7 @@ bool linux_ficlone(const std::string& src_path, const std::string& dst_path, std
}
// attempt to clone
if(ioctl(dst_fd, FICLONE, src_fd) == -1){
qWarning() << "Failed to clone file:" << src_path.c_str() << "to" << dst_path.c_str();
qDebug() << "Failed to clone file:" << src_path.c_str() << "to" << dst_path.c_str();
qDebug() << "Error:" << strerror(errno);
ec = std::make_error_code(static_cast<std::errc>(errno));
close(src_fd);
@ -1259,11 +1551,11 @@ bool linux_ficlone(const std::string& src_path, const std::string& dst_path, std
return false;
}
if(close(src_fd)) {
qWarning() << "Failed to close file:" << src_path.c_str();
qDebug() << "Failed to close file:" << src_path.c_str();
qDebug() << "Error:" << strerror(errno);
}
if(close(dst_fd)) {
qWarning() << "Failed to close file:" << dst_path.c_str();
qDebug() << "Failed to close file:" << dst_path.c_str();
qDebug() << "Error:" << strerror(errno);
}
return true;
@ -1277,7 +1569,7 @@ bool macos_bsd_clonefile(const std::string& src_path, const std::string& dst_pat
qDebug() << "attempting file clone via clonefile" << src_path.c_str() << "to" << dst_path.c_str();
if (clonefile(src_path.c_str(), dst_path.c_str(), 0) == -1) {
qWarning() << "Failed to clone file:" << src_path.c_str() << "to" << dst_path.c_str();
qDebug() << "Failed to clone file:" << src_path.c_str() << "to" << dst_path.c_str();
qDebug() << "Error:" << strerror(errno);
ec = std::make_error_code(static_cast<std::errc>(errno));
return false;

10
launcher/FileSystem.h
View File

@ -409,6 +409,7 @@ inline QString getFilesystemTypeName(FilesystemType type) {
struct FilesystemInfo {
FilesystemType fsType = FilesystemType::UNKNOWN;
QString fsTypeName;
int blockSize;
qint64 bytesAvailable;
qint64 bytesFree;
@ -496,8 +497,17 @@ class clone : public QObject {
bool clone_file(const QString& src, const QString& dst, std::error_code& ec);
#if defined(Q_OS_WIN)
#ifndef FSCTL_DUPLICATE_EXTENTS_TO_FILE
#define FSCTL_DUPLICATE_EXTENTS_TO_FILE CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 209, METHOD_BUFFERED, FILE_WRITE_DATA )
#endif
bool winbtrfs_clone(const std::wstring& src_path, const std::wstring& dst_path, std::error_code& ec);
bool refs_clone(const std::wstring& src_path, const std::wstring& dst_path, std::error_code& ec);
bool ioctl_clone(const std::wstring& src_path, const std::wstring& dst_path, std::error_code& ec);
#define USE_IOCTL_CLONE true
#elif defined(Q_OS_LINUX)
bool linux_ficlone(const std::string& src_path, const std::string& dst_path, std::error_code& ec);
#elif defined(Q_OS_MACOS) || defined(Q_OS_FREEBSD) || defined(Q_OS_OPENBSD)