mirror of
https://github.com/winfsp/winfsp.git
synced 2025-10-30 19:48:38 -05:00
936 lines
29 KiB
C
936 lines
29 KiB
C
/**
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* @file passthrough.c
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*
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* @copyright 2015-2017 Bill Zissimopoulos
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*/
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/*
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* This file is part of WinFsp.
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*
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* You can redistribute it and/or modify it under the terms of the GNU
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* General Public License version 3 as published by the Free Software
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* Foundation.
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*
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* Licensees holding a valid commercial license may use this file in
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* accordance with the commercial license agreement provided with the
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* software.
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*/
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#include <winfsp/winfsp.h>
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#include <strsafe.h>
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#define PROGNAME "passthrough"
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#define ALLOCATION_UNIT 4096
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#define FULLPATH_SIZE (MAX_PATH + FSP_FSCTL_TRANSACT_PATH_SIZEMAX / sizeof(WCHAR))
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#define info(format, ...) FspServiceLog(EVENTLOG_INFORMATION_TYPE, format, __VA_ARGS__)
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#define warn(format, ...) FspServiceLog(EVENTLOG_WARNING_TYPE, format, __VA_ARGS__)
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#define fail(format, ...) FspServiceLog(EVENTLOG_ERROR_TYPE, format, __VA_ARGS__)
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#define ConcatPath(Ptfs, FN, FP) (0 == StringCbPrintfW(FP, sizeof FP, L"%s%s", Ptfs->Path, FN))
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#define HandleFromContext(FC) (((PTFS_FILE_CONTEXT *)(FC))->Handle)
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typedef struct
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{
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FSP_FILE_SYSTEM *FileSystem;
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PWSTR Path;
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} PTFS;
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typedef struct
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{
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HANDLE Handle;
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PVOID DirBuffer;
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} PTFS_FILE_CONTEXT;
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static NTSTATUS GetFileInfoInternal(HANDLE Handle, FSP_FSCTL_FILE_INFO *FileInfo)
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{
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BY_HANDLE_FILE_INFORMATION ByHandleFileInfo;
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if (!GetFileInformationByHandle(Handle, &ByHandleFileInfo))
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return FspNtStatusFromWin32(GetLastError());
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FileInfo->FileAttributes = ByHandleFileInfo.dwFileAttributes;
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FileInfo->ReparseTag = 0;
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FileInfo->FileSize =
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((UINT64)ByHandleFileInfo.nFileSizeHigh << 32) | (UINT64)ByHandleFileInfo.nFileSizeLow;
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FileInfo->AllocationSize = (FileInfo->FileSize + ALLOCATION_UNIT - 1)
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/ ALLOCATION_UNIT * ALLOCATION_UNIT;
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FileInfo->CreationTime = ((PLARGE_INTEGER)&ByHandleFileInfo.ftCreationTime)->QuadPart;
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FileInfo->LastAccessTime = ((PLARGE_INTEGER)&ByHandleFileInfo.ftLastAccessTime)->QuadPart;
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FileInfo->LastWriteTime = ((PLARGE_INTEGER)&ByHandleFileInfo.ftLastWriteTime)->QuadPart;
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FileInfo->ChangeTime = FileInfo->LastWriteTime;
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FileInfo->IndexNumber = 0;
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FileInfo->HardLinks = 0;
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return STATUS_SUCCESS;
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}
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static NTSTATUS GetVolumeInfo(FSP_FILE_SYSTEM *FileSystem,
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FSP_FSCTL_VOLUME_INFO *VolumeInfo)
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{
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PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
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WCHAR Root[MAX_PATH];
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ULARGE_INTEGER TotalSize, FreeSize;
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if (!GetVolumePathName(Ptfs->Path, Root, MAX_PATH))
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return FspNtStatusFromWin32(GetLastError());
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if (!GetDiskFreeSpaceEx(Root, 0, &TotalSize, &FreeSize))
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return FspNtStatusFromWin32(GetLastError());
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VolumeInfo->TotalSize = TotalSize.QuadPart;
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VolumeInfo->FreeSize = FreeSize.QuadPart;
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return STATUS_SUCCESS;
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}
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static NTSTATUS SetVolumeLabel_(FSP_FILE_SYSTEM *FileSystem,
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PWSTR VolumeLabel,
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FSP_FSCTL_VOLUME_INFO *VolumeInfo)
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{
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/* we do not support changing the volume label */
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return STATUS_INVALID_DEVICE_REQUEST;
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}
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static NTSTATUS GetSecurityByName(FSP_FILE_SYSTEM *FileSystem,
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PWSTR FileName, PUINT32 PFileAttributes,
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PSECURITY_DESCRIPTOR SecurityDescriptor, SIZE_T *PSecurityDescriptorSize)
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{
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PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
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WCHAR FullPath[FULLPATH_SIZE];
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HANDLE Handle;
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FILE_ATTRIBUTE_TAG_INFO AttributeTagInfo;
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DWORD SecurityDescriptorSizeNeeded;
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NTSTATUS Result;
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if (!ConcatPath(Ptfs, FileName, FullPath))
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return STATUS_OBJECT_NAME_INVALID;
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Handle = CreateFileW(FullPath,
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FILE_READ_ATTRIBUTES | READ_CONTROL, 0, 0,
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OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
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if (INVALID_HANDLE_VALUE == Handle)
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{
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Result = FspNtStatusFromWin32(GetLastError());
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goto exit;
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}
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if (0 != PFileAttributes)
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{
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if (!GetFileInformationByHandleEx(Handle,
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FileAttributeTagInfo, &AttributeTagInfo, sizeof AttributeTagInfo))
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{
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Result = FspNtStatusFromWin32(GetLastError());
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goto exit;
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}
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*PFileAttributes = AttributeTagInfo.FileAttributes;
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}
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if (0 != PSecurityDescriptorSize)
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{
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if (!GetKernelObjectSecurity(Handle,
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OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
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SecurityDescriptor, (DWORD)*PSecurityDescriptorSize, &SecurityDescriptorSizeNeeded))
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{
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*PSecurityDescriptorSize = SecurityDescriptorSizeNeeded;
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Result = FspNtStatusFromWin32(GetLastError());
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goto exit;
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}
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*PSecurityDescriptorSize = SecurityDescriptorSizeNeeded;
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}
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Result = STATUS_SUCCESS;
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exit:
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if (INVALID_HANDLE_VALUE != Handle)
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CloseHandle(Handle);
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return Result;
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}
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static NTSTATUS Create(FSP_FILE_SYSTEM *FileSystem,
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PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
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UINT32 FileAttributes, PSECURITY_DESCRIPTOR SecurityDescriptor, UINT64 AllocationSize,
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PVOID *PFileContext, FSP_FSCTL_FILE_INFO *FileInfo)
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{
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PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
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WCHAR FullPath[FULLPATH_SIZE];
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SECURITY_ATTRIBUTES SecurityAttributes;
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ULONG CreateFlags;
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PTFS_FILE_CONTEXT *FileContext;
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if (!ConcatPath(Ptfs, FileName, FullPath))
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return STATUS_OBJECT_NAME_INVALID;
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FileContext = malloc(sizeof *FileContext);
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if (0 == FileContext)
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return STATUS_INSUFFICIENT_RESOURCES;
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memset(FileContext, 0, sizeof *FileContext);
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SecurityAttributes.nLength = sizeof SecurityAttributes;
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SecurityAttributes.lpSecurityDescriptor = SecurityDescriptor;
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SecurityAttributes.bInheritHandle = FALSE;
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CreateFlags = FILE_FLAG_BACKUP_SEMANTICS;
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if (CreateOptions & FILE_DELETE_ON_CLOSE)
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CreateFlags |= FILE_FLAG_DELETE_ON_CLOSE;
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if (CreateOptions & FILE_DIRECTORY_FILE)
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{
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/*
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* It is not widely known but CreateFileW can be used to create directories!
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* It requires the specification of both FILE_FLAG_BACKUP_SEMANTICS and
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* FILE_FLAG_POSIX_SEMANTICS. It also requires that FileAttributes has
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* FILE_ATTRIBUTE_DIRECTORY set.
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*/
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CreateFlags |= FILE_FLAG_POSIX_SEMANTICS;
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FileAttributes |= FILE_ATTRIBUTE_DIRECTORY;
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}
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else
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FileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY;
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if (0 == FileAttributes)
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FileAttributes = FILE_ATTRIBUTE_NORMAL;
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FileContext->Handle = CreateFileW(FullPath,
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GrantedAccess, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, &SecurityAttributes,
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CREATE_NEW, CreateFlags | FileAttributes, 0);
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if (INVALID_HANDLE_VALUE == FileContext->Handle)
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{
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free(FileContext);
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return FspNtStatusFromWin32(GetLastError());
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}
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*PFileContext = FileContext;
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return GetFileInfoInternal(FileContext->Handle, FileInfo);
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}
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static NTSTATUS Open(FSP_FILE_SYSTEM *FileSystem,
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PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
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PVOID *PFileContext, FSP_FSCTL_FILE_INFO *FileInfo)
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{
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PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
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WCHAR FullPath[FULLPATH_SIZE];
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ULONG CreateFlags;
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PTFS_FILE_CONTEXT *FileContext;
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if (!ConcatPath(Ptfs, FileName, FullPath))
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return STATUS_OBJECT_NAME_INVALID;
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FileContext = malloc(sizeof *FileContext);
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if (0 == FileContext)
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return STATUS_INSUFFICIENT_RESOURCES;
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memset(FileContext, 0, sizeof *FileContext);
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CreateFlags = FILE_FLAG_BACKUP_SEMANTICS;
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if (CreateOptions & FILE_DELETE_ON_CLOSE)
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CreateFlags |= FILE_FLAG_DELETE_ON_CLOSE;
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FileContext->Handle = CreateFileW(FullPath,
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GrantedAccess, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 0,
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OPEN_EXISTING, CreateFlags, 0);
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if (INVALID_HANDLE_VALUE == FileContext->Handle)
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{
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free(FileContext);
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return FspNtStatusFromWin32(GetLastError());
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}
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*PFileContext = FileContext;
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return GetFileInfoInternal(FileContext->Handle, FileInfo);
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}
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static NTSTATUS Overwrite(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext, UINT32 FileAttributes, BOOLEAN ReplaceFileAttributes, UINT64 AllocationSize,
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FSP_FSCTL_FILE_INFO *FileInfo)
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{
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HANDLE Handle = HandleFromContext(FileContext);
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FILE_BASIC_INFO BasicInfo = { 0 };
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FILE_ALLOCATION_INFO AllocationInfo = { 0 };
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FILE_ATTRIBUTE_TAG_INFO AttributeTagInfo;
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if (ReplaceFileAttributes)
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{
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if (0 == FileAttributes)
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FileAttributes = FILE_ATTRIBUTE_NORMAL;
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BasicInfo.FileAttributes = FileAttributes;
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if (!SetFileInformationByHandle(Handle,
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FileBasicInfo, &BasicInfo, sizeof BasicInfo))
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return FspNtStatusFromWin32(GetLastError());
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}
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else if (0 != FileAttributes)
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{
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if (!GetFileInformationByHandleEx(Handle,
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FileAttributeTagInfo, &AttributeTagInfo, sizeof AttributeTagInfo))
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return FspNtStatusFromWin32(GetLastError());
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BasicInfo.FileAttributes = FileAttributes | AttributeTagInfo.FileAttributes;
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if (BasicInfo.FileAttributes ^ FileAttributes)
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{
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if (!SetFileInformationByHandle(Handle,
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FileBasicInfo, &BasicInfo, sizeof BasicInfo))
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return FspNtStatusFromWin32(GetLastError());
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}
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}
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if (!SetFileInformationByHandle(Handle,
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FileAllocationInfo, &AllocationInfo, sizeof AllocationInfo))
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return FspNtStatusFromWin32(GetLastError());
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return GetFileInfoInternal(Handle, FileInfo);
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}
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static VOID Cleanup(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext, PWSTR FileName, ULONG Flags)
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{
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HANDLE Handle = HandleFromContext(FileContext);
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if (Flags & FspCleanupDelete)
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{
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CloseHandle(Handle);
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/* this will make all future uses of Handle to fail with STATUS_INVALID_HANDLE */
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HandleFromContext(FileContext) = INVALID_HANDLE_VALUE;
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}
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}
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static VOID Close(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext0)
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{
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PTFS_FILE_CONTEXT *FileContext = FileContext0;
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HANDLE Handle = HandleFromContext(FileContext);
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CloseHandle(Handle);
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FspFileSystemDeleteDirectoryBuffer(&FileContext->DirBuffer);
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free(FileContext);
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}
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static NTSTATUS Read(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext, PVOID Buffer, UINT64 Offset, ULONG Length,
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PULONG PBytesTransferred)
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{
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HANDLE Handle = HandleFromContext(FileContext);
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OVERLAPPED Overlapped = { 0 };
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Overlapped.Offset = (DWORD)Offset;
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Overlapped.OffsetHigh = (DWORD)(Offset >> 32);
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if (!ReadFile(Handle, Buffer, Length, PBytesTransferred, &Overlapped))
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return FspNtStatusFromWin32(GetLastError());
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return STATUS_SUCCESS;
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}
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static NTSTATUS Write(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext, PVOID Buffer, UINT64 Offset, ULONG Length,
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BOOLEAN WriteToEndOfFile, BOOLEAN ConstrainedIo,
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PULONG PBytesTransferred, FSP_FSCTL_FILE_INFO *FileInfo)
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{
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HANDLE Handle = HandleFromContext(FileContext);
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LARGE_INTEGER FileSize;
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OVERLAPPED Overlapped = { 0 };
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if (ConstrainedIo)
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{
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if (!GetFileSizeEx(Handle, &FileSize))
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return FspNtStatusFromWin32(GetLastError());
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if (Offset >= (UINT64)FileSize.QuadPart)
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return STATUS_SUCCESS;
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if (Offset + Length > (UINT64)FileSize.QuadPart)
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Length = (ULONG)((UINT64)FileSize.QuadPart - Offset);
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}
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Overlapped.Offset = (DWORD)Offset;
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Overlapped.OffsetHigh = (DWORD)(Offset >> 32);
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if (!WriteFile(Handle, Buffer, Length, PBytesTransferred, &Overlapped))
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return FspNtStatusFromWin32(GetLastError());
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return GetFileInfoInternal(Handle, FileInfo);
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}
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NTSTATUS Flush(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext,
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FSP_FSCTL_FILE_INFO *FileInfo)
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{
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HANDLE Handle = HandleFromContext(FileContext);
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/* we do not flush the whole volume, so just return SUCCESS */
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if (0 == Handle)
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return STATUS_SUCCESS;
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if (!FlushFileBuffers(Handle))
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return FspNtStatusFromWin32(GetLastError());
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return GetFileInfoInternal(Handle, FileInfo);
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}
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static NTSTATUS GetFileInfo(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext,
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FSP_FSCTL_FILE_INFO *FileInfo)
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{
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HANDLE Handle = HandleFromContext(FileContext);
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return GetFileInfoInternal(Handle, FileInfo);
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}
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static NTSTATUS SetBasicInfo(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext, UINT32 FileAttributes,
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UINT64 CreationTime, UINT64 LastAccessTime, UINT64 LastWriteTime, UINT64 ChangeTime,
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FSP_FSCTL_FILE_INFO *FileInfo)
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{
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HANDLE Handle = HandleFromContext(FileContext);
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FILE_BASIC_INFO BasicInfo = { 0 };
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if (INVALID_FILE_ATTRIBUTES == FileAttributes)
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FileAttributes = 0;
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else if (0 == FileAttributes)
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FileAttributes = FILE_ATTRIBUTE_NORMAL;
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BasicInfo.FileAttributes = FileAttributes;
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BasicInfo.CreationTime.QuadPart = CreationTime;
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BasicInfo.LastAccessTime.QuadPart = LastAccessTime;
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BasicInfo.LastWriteTime.QuadPart = LastWriteTime;
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//BasicInfo.ChangeTime = ChangeTime;
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if (!SetFileInformationByHandle(Handle,
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FileBasicInfo, &BasicInfo, sizeof BasicInfo))
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return FspNtStatusFromWin32(GetLastError());
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return GetFileInfoInternal(Handle, FileInfo);
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}
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static NTSTATUS SetFileSize(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext, UINT64 NewSize, BOOLEAN SetAllocationSize,
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FSP_FSCTL_FILE_INFO *FileInfo)
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{
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HANDLE Handle = HandleFromContext(FileContext);
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FILE_ALLOCATION_INFO AllocationInfo;
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FILE_END_OF_FILE_INFO EndOfFileInfo;
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if (SetAllocationSize)
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{
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/*
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* This file system does not maintain AllocationSize, although NTFS clearly can.
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* However it must always be FileSize <= AllocationSize and NTFS will make sure
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* to truncate the FileSize if it sees an AllocationSize < FileSize.
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*
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* If OTOH a very large AllocationSize is passed, the call below will increase
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* the AllocationSize of the underlying file, although our file system does not
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* expose this fact. This AllocationSize is only temporary as NTFS will reset
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* the AllocationSize of the underlying file when it is closed.
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*/
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AllocationInfo.AllocationSize.QuadPart = NewSize;
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if (!SetFileInformationByHandle(Handle,
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FileAllocationInfo, &AllocationInfo, sizeof AllocationInfo))
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return FspNtStatusFromWin32(GetLastError());
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}
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else
|
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{
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EndOfFileInfo.EndOfFile.QuadPart = NewSize;
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|
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if (!SetFileInformationByHandle(Handle,
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FileEndOfFileInfo, &EndOfFileInfo, sizeof EndOfFileInfo))
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return FspNtStatusFromWin32(GetLastError());
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}
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return GetFileInfoInternal(Handle, FileInfo);
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}
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static NTSTATUS CanDelete(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext, PWSTR FileName)
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{
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HANDLE Handle = HandleFromContext(FileContext);
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FILE_DISPOSITION_INFO DispositionInfo;
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DispositionInfo.DeleteFile = TRUE;
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if (!SetFileInformationByHandle(Handle,
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FileDispositionInfo, &DispositionInfo, sizeof DispositionInfo))
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return FspNtStatusFromWin32(GetLastError());
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return STATUS_SUCCESS;
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}
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static NTSTATUS Rename(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext,
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PWSTR FileName, PWSTR NewFileName, BOOLEAN ReplaceIfExists)
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{
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PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
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WCHAR FullPath[FULLPATH_SIZE], NewFullPath[FULLPATH_SIZE];
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if (!ConcatPath(Ptfs, FileName, FullPath))
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return STATUS_OBJECT_NAME_INVALID;
|
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|
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if (!ConcatPath(Ptfs, NewFileName, NewFullPath))
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return STATUS_OBJECT_NAME_INVALID;
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|
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if (!MoveFileExW(FullPath, NewFullPath, ReplaceIfExists ? MOVEFILE_REPLACE_EXISTING : 0))
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return FspNtStatusFromWin32(GetLastError());
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return STATUS_SUCCESS;
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}
|
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|
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static NTSTATUS GetSecurity(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileContext,
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PSECURITY_DESCRIPTOR SecurityDescriptor, SIZE_T *PSecurityDescriptorSize)
|
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{
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HANDLE Handle = HandleFromContext(FileContext);
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DWORD SecurityDescriptorSizeNeeded;
|
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|
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if (!GetKernelObjectSecurity(Handle,
|
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OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
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SecurityDescriptor, (DWORD)*PSecurityDescriptorSize, &SecurityDescriptorSizeNeeded))
|
|
{
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*PSecurityDescriptorSize = SecurityDescriptorSizeNeeded;
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return FspNtStatusFromWin32(GetLastError());
|
|
}
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|
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*PSecurityDescriptorSize = SecurityDescriptorSizeNeeded;
|
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|
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return STATUS_SUCCESS;
|
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}
|
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|
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static NTSTATUS SetSecurity(FSP_FILE_SYSTEM *FileSystem,
|
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PVOID FileContext,
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SECURITY_INFORMATION SecurityInformation, PSECURITY_DESCRIPTOR ModificationDescriptor)
|
|
{
|
|
HANDLE Handle = HandleFromContext(FileContext);
|
|
|
|
if (!SetKernelObjectSecurity(Handle, SecurityInformation, ModificationDescriptor))
|
|
return FspNtStatusFromWin32(GetLastError());
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
static NTSTATUS ReadDirectory(FSP_FILE_SYSTEM *FileSystem,
|
|
PVOID FileContext0, PWSTR Pattern, PWSTR Marker,
|
|
PVOID Buffer, ULONG BufferLength, PULONG PBytesTransferred)
|
|
{
|
|
PTFS *Ptfs = (PTFS *)FileSystem->UserContext;
|
|
PTFS_FILE_CONTEXT *FileContext = FileContext0;
|
|
HANDLE Handle = HandleFromContext(FileContext);
|
|
WCHAR FullPath[FULLPATH_SIZE];
|
|
ULONG Length, PatternLength;
|
|
HANDLE FindHandle;
|
|
WIN32_FIND_DATAW FindData;
|
|
union
|
|
{
|
|
UINT8 B[FIELD_OFFSET(FSP_FSCTL_DIR_INFO, FileNameBuf) + MAX_PATH * sizeof(WCHAR)];
|
|
FSP_FSCTL_DIR_INFO D;
|
|
} DirInfoBuf;
|
|
FSP_FSCTL_DIR_INFO *DirInfo = &DirInfoBuf.D;
|
|
NTSTATUS DirBufferResult;
|
|
|
|
DirBufferResult = STATUS_SUCCESS;
|
|
if (FspFileSystemAcquireDirectoryBuffer(&FileContext->DirBuffer, 0 == Marker, &DirBufferResult))
|
|
{
|
|
if (0 == Pattern)
|
|
Pattern = L"*";
|
|
PatternLength = (ULONG)wcslen(Pattern);
|
|
|
|
Length = GetFinalPathNameByHandleW(Handle, FullPath, FULLPATH_SIZE - 1, 0);
|
|
if (0 == Length)
|
|
DirBufferResult = FspNtStatusFromWin32(GetLastError());
|
|
else if (Length + 1 + PatternLength >= FULLPATH_SIZE)
|
|
DirBufferResult = STATUS_OBJECT_NAME_INVALID;
|
|
if (!NT_SUCCESS(DirBufferResult))
|
|
{
|
|
FspFileSystemReleaseDirectoryBuffer(&FileContext->DirBuffer);
|
|
return DirBufferResult;
|
|
}
|
|
|
|
if (L'\\' != FullPath[Length - 1])
|
|
FullPath[Length++] = L'\\';
|
|
memcpy(FullPath + Length, Pattern, PatternLength * sizeof(WCHAR));
|
|
FullPath[Length + PatternLength] = L'\0';
|
|
|
|
FindHandle = FindFirstFileW(FullPath, &FindData);
|
|
if (INVALID_HANDLE_VALUE != FindHandle)
|
|
{
|
|
do
|
|
{
|
|
memset(DirInfo, 0, sizeof *DirInfo);
|
|
Length = (ULONG)wcslen(FindData.cFileName);
|
|
DirInfo->Size = (UINT16)(FIELD_OFFSET(FSP_FSCTL_DIR_INFO, FileNameBuf) + Length * sizeof(WCHAR));
|
|
DirInfo->FileInfo.FileAttributes = FindData.dwFileAttributes;
|
|
DirInfo->FileInfo.ReparseTag = 0;
|
|
DirInfo->FileInfo.FileSize =
|
|
((UINT64)FindData.nFileSizeHigh << 32) | (UINT64)FindData.nFileSizeLow;
|
|
DirInfo->FileInfo.AllocationSize = (DirInfo->FileInfo.FileSize + ALLOCATION_UNIT - 1)
|
|
/ ALLOCATION_UNIT * ALLOCATION_UNIT;
|
|
DirInfo->FileInfo.CreationTime = ((PLARGE_INTEGER)&FindData.ftCreationTime)->QuadPart;
|
|
DirInfo->FileInfo.LastAccessTime = ((PLARGE_INTEGER)&FindData.ftLastAccessTime)->QuadPart;
|
|
DirInfo->FileInfo.LastWriteTime = ((PLARGE_INTEGER)&FindData.ftLastWriteTime)->QuadPart;
|
|
DirInfo->FileInfo.ChangeTime = DirInfo->FileInfo.LastWriteTime;
|
|
DirInfo->FileInfo.IndexNumber = 0;
|
|
DirInfo->FileInfo.HardLinks = 0;
|
|
memcpy(DirInfo->FileNameBuf, FindData.cFileName, Length * sizeof(WCHAR));
|
|
|
|
if (!FspFileSystemFillDirectoryBuffer(&FileContext->DirBuffer, DirInfo, &DirBufferResult))
|
|
break;
|
|
} while (FindNextFileW(FindHandle, &FindData));
|
|
|
|
FindClose(FindHandle);
|
|
}
|
|
|
|
FspFileSystemReleaseDirectoryBuffer(&FileContext->DirBuffer);
|
|
}
|
|
|
|
if (!NT_SUCCESS(DirBufferResult))
|
|
return DirBufferResult;
|
|
|
|
FspFileSystemReadDirectoryBuffer(&FileContext->DirBuffer,
|
|
Marker, Buffer, BufferLength, PBytesTransferred);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
static FSP_FILE_SYSTEM_INTERFACE PtfsInterface =
|
|
{
|
|
GetVolumeInfo,
|
|
SetVolumeLabel_,
|
|
GetSecurityByName,
|
|
Create,
|
|
Open,
|
|
Overwrite,
|
|
Cleanup,
|
|
Close,
|
|
Read,
|
|
Write,
|
|
Flush,
|
|
GetFileInfo,
|
|
SetBasicInfo,
|
|
SetFileSize,
|
|
CanDelete,
|
|
Rename,
|
|
GetSecurity,
|
|
SetSecurity,
|
|
ReadDirectory,
|
|
};
|
|
|
|
static VOID PtfsDelete(PTFS *Ptfs);
|
|
|
|
static NTSTATUS PtfsCreate(PWSTR Path, PWSTR VolumePrefix, PWSTR MountPoint, UINT32 DebugFlags,
|
|
PTFS **PPtfs)
|
|
{
|
|
WCHAR FullPath[MAX_PATH];
|
|
ULONG Length;
|
|
HANDLE Handle;
|
|
FILETIME CreationTime;
|
|
DWORD LastError;
|
|
FSP_FSCTL_VOLUME_PARAMS VolumeParams;
|
|
PTFS *Ptfs = 0;
|
|
NTSTATUS Result;
|
|
|
|
*PPtfs = 0;
|
|
|
|
Handle = CreateFileW(
|
|
Path, FILE_READ_ATTRIBUTES, 0, 0,
|
|
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
|
|
if (INVALID_HANDLE_VALUE == Handle)
|
|
return FspNtStatusFromWin32(GetLastError());
|
|
|
|
Length = GetFinalPathNameByHandleW(Handle, FullPath, FULLPATH_SIZE - 1, 0);
|
|
if (0 == Length)
|
|
{
|
|
LastError = GetLastError();
|
|
CloseHandle(Handle);
|
|
return FspNtStatusFromWin32(LastError);
|
|
}
|
|
if (L'\\' == FullPath[Length - 1])
|
|
FullPath[--Length] = L'\0';
|
|
|
|
if (!GetFileTime(Handle, &CreationTime, 0, 0))
|
|
{
|
|
LastError = GetLastError();
|
|
CloseHandle(Handle);
|
|
return FspNtStatusFromWin32(LastError);
|
|
}
|
|
|
|
CloseHandle(Handle);
|
|
|
|
/* from now on we must goto exit on failure */
|
|
|
|
Ptfs = malloc(sizeof *Ptfs);
|
|
if (0 == Ptfs)
|
|
{
|
|
Result = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto exit;
|
|
}
|
|
memset(Ptfs, 0, sizeof *Ptfs);
|
|
|
|
Length = (Length + 1) * sizeof(WCHAR);
|
|
Ptfs->Path = malloc(Length);
|
|
if (0 == Ptfs->Path)
|
|
{
|
|
Result = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto exit;
|
|
}
|
|
memcpy(Ptfs->Path, FullPath, Length);
|
|
|
|
memset(&VolumeParams, 0, sizeof VolumeParams);
|
|
VolumeParams.SectorSize = ALLOCATION_UNIT;
|
|
VolumeParams.SectorsPerAllocationUnit = 1;
|
|
VolumeParams.VolumeCreationTime = ((PLARGE_INTEGER)&CreationTime)->QuadPart;
|
|
VolumeParams.VolumeSerialNumber = 0;
|
|
VolumeParams.FileInfoTimeout = 1000;
|
|
VolumeParams.CaseSensitiveSearch = 0;
|
|
VolumeParams.CasePreservedNames = 1;
|
|
VolumeParams.UnicodeOnDisk = 1;
|
|
VolumeParams.PersistentAcls = 1;
|
|
VolumeParams.PostCleanupWhenModifiedOnly = 1;
|
|
VolumeParams.PassQueryDirectoryPattern = 1;
|
|
VolumeParams.UmFileContextIsUserContext2 = 1;
|
|
if (0 != VolumePrefix)
|
|
wcscpy_s(VolumeParams.Prefix, sizeof VolumeParams.Prefix / sizeof(WCHAR), VolumePrefix);
|
|
wcscpy_s(VolumeParams.FileSystemName, sizeof VolumeParams.FileSystemName / sizeof(WCHAR),
|
|
L"" PROGNAME);
|
|
|
|
Result = FspFileSystemCreate(
|
|
VolumeParams.Prefix[0] ? L"" FSP_FSCTL_NET_DEVICE_NAME : L"" FSP_FSCTL_DISK_DEVICE_NAME,
|
|
&VolumeParams,
|
|
&PtfsInterface,
|
|
&Ptfs->FileSystem);
|
|
if (!NT_SUCCESS(Result))
|
|
goto exit;
|
|
Ptfs->FileSystem->UserContext = Ptfs;
|
|
|
|
Result = FspFileSystemSetMountPoint(Ptfs->FileSystem, MountPoint);
|
|
if (!NT_SUCCESS(Result))
|
|
goto exit;
|
|
|
|
FspFileSystemSetDebugLog(Ptfs->FileSystem, DebugFlags);
|
|
|
|
Result = STATUS_SUCCESS;
|
|
|
|
exit:
|
|
if (NT_SUCCESS(Result))
|
|
*PPtfs = Ptfs;
|
|
else if (0 != Ptfs)
|
|
PtfsDelete(Ptfs);
|
|
|
|
return Result;
|
|
}
|
|
|
|
static VOID PtfsDelete(PTFS *Ptfs)
|
|
{
|
|
if (0 != Ptfs->FileSystem)
|
|
FspFileSystemDelete(Ptfs->FileSystem);
|
|
|
|
if (0 != Ptfs->Path)
|
|
free(Ptfs->Path);
|
|
|
|
free(Ptfs);
|
|
}
|
|
|
|
static NTSTATUS EnableBackupRestorePrivileges(VOID)
|
|
{
|
|
union
|
|
{
|
|
TOKEN_PRIVILEGES P;
|
|
UINT8 B[sizeof(TOKEN_PRIVILEGES) + sizeof(LUID_AND_ATTRIBUTES)];
|
|
} Privileges;
|
|
HANDLE Token;
|
|
|
|
Privileges.P.PrivilegeCount = 2;
|
|
Privileges.P.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
|
|
Privileges.P.Privileges[1].Attributes = SE_PRIVILEGE_ENABLED;
|
|
|
|
if (!LookupPrivilegeValueW(0, SE_BACKUP_NAME, &Privileges.P.Privileges[0].Luid) ||
|
|
!LookupPrivilegeValueW(0, SE_RESTORE_NAME, &Privileges.P.Privileges[1].Luid))
|
|
return FspNtStatusFromWin32(GetLastError());
|
|
|
|
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &Token))
|
|
return FspNtStatusFromWin32(GetLastError());
|
|
|
|
if (!AdjustTokenPrivileges(Token, FALSE, &Privileges.P, 0, 0, 0))
|
|
{
|
|
CloseHandle(Token);
|
|
|
|
return FspNtStatusFromWin32(GetLastError());
|
|
}
|
|
|
|
CloseHandle(Token);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
static ULONG wcstol_deflt(wchar_t *w, ULONG deflt)
|
|
{
|
|
wchar_t *endp;
|
|
ULONG ul = wcstol(w, &endp, 0);
|
|
return L'\0' != w[0] && L'\0' == *endp ? ul : deflt;
|
|
}
|
|
|
|
static NTSTATUS SvcStart(FSP_SERVICE *Service, ULONG argc, PWSTR *argv)
|
|
{
|
|
#define argtos(v) if (arge > ++argp) v = *argp; else goto usage
|
|
#define argtol(v) if (arge > ++argp) v = wcstol_deflt(*argp, v); else goto usage
|
|
|
|
wchar_t **argp, **arge;
|
|
PWSTR DebugLogFile = 0;
|
|
ULONG DebugFlags = 0;
|
|
PWSTR VolumePrefix = 0;
|
|
PWSTR PassThrough = 0;
|
|
PWSTR MountPoint = 0;
|
|
HANDLE DebugLogHandle = INVALID_HANDLE_VALUE;
|
|
WCHAR PassThroughBuf[MAX_PATH];
|
|
PTFS *Ptfs = 0;
|
|
NTSTATUS Result;
|
|
|
|
for (argp = argv + 1, arge = argv + argc; arge > argp; argp++)
|
|
{
|
|
if (L'-' != argp[0][0])
|
|
break;
|
|
switch (argp[0][1])
|
|
{
|
|
case L'?':
|
|
goto usage;
|
|
case L'd':
|
|
argtol(DebugFlags);
|
|
break;
|
|
case L'D':
|
|
argtos(DebugLogFile);
|
|
break;
|
|
case L'm':
|
|
argtos(MountPoint);
|
|
break;
|
|
case L'p':
|
|
argtos(PassThrough);
|
|
break;
|
|
case L'u':
|
|
argtos(VolumePrefix);
|
|
break;
|
|
default:
|
|
goto usage;
|
|
}
|
|
}
|
|
|
|
if (arge > argp)
|
|
goto usage;
|
|
|
|
if (0 == PassThrough && 0 != VolumePrefix)
|
|
{
|
|
PWSTR P;
|
|
|
|
P = wcschr(VolumePrefix, L'\\');
|
|
if (0 != P && L'\\' != P[1])
|
|
{
|
|
P = wcschr(P + 1, L'\\');
|
|
if (0 != P &&
|
|
(
|
|
(L'A' <= P[1] && P[1] <= L'Z') ||
|
|
(L'a' <= P[1] && P[1] <= L'z')
|
|
) &&
|
|
L'$' == P[2])
|
|
{
|
|
StringCbPrintf(PassThroughBuf, sizeof PassThroughBuf, L"%c:%s", P[1], P + 3);
|
|
PassThrough = PassThroughBuf;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (0 == PassThrough || 0 == MountPoint)
|
|
goto usage;
|
|
|
|
EnableBackupRestorePrivileges();
|
|
|
|
if (0 != DebugLogFile)
|
|
{
|
|
if (0 == wcscmp(L"-", DebugLogFile))
|
|
DebugLogHandle = GetStdHandle(STD_ERROR_HANDLE);
|
|
else
|
|
DebugLogHandle = CreateFileW(
|
|
DebugLogFile,
|
|
FILE_APPEND_DATA,
|
|
FILE_SHARE_READ | FILE_SHARE_WRITE,
|
|
0,
|
|
OPEN_ALWAYS,
|
|
FILE_ATTRIBUTE_NORMAL,
|
|
0);
|
|
if (INVALID_HANDLE_VALUE == DebugLogHandle)
|
|
{
|
|
fail(L"cannot open debug log file");
|
|
goto usage;
|
|
}
|
|
|
|
FspDebugLogSetHandle(DebugLogHandle);
|
|
}
|
|
|
|
Result = PtfsCreate(PassThrough, VolumePrefix, MountPoint, DebugFlags, &Ptfs);
|
|
if (!NT_SUCCESS(Result))
|
|
{
|
|
fail(L"cannot create file system");
|
|
goto exit;
|
|
}
|
|
|
|
Result = FspFileSystemStartDispatcher(Ptfs->FileSystem, 0);
|
|
if (!NT_SUCCESS(Result))
|
|
{
|
|
fail(L"cannot start file system");
|
|
goto exit;
|
|
}
|
|
|
|
MountPoint = FspFileSystemMountPoint(Ptfs->FileSystem);
|
|
|
|
info(L"%s%s%s -p %s -m %s",
|
|
L"" PROGNAME,
|
|
0 != VolumePrefix && L'\0' != VolumePrefix[0] ? L" -u " : L"",
|
|
0 != VolumePrefix && L'\0' != VolumePrefix[0] ? VolumePrefix : L"",
|
|
PassThrough,
|
|
MountPoint);
|
|
|
|
Service->UserContext = Ptfs;
|
|
Result = STATUS_SUCCESS;
|
|
|
|
exit:
|
|
if (!NT_SUCCESS(Result) && 0 != Ptfs)
|
|
PtfsDelete(Ptfs);
|
|
|
|
return Result;
|
|
|
|
usage:
|
|
static wchar_t usage[] = L""
|
|
"usage: %s OPTIONS\n"
|
|
"\n"
|
|
"options:\n"
|
|
" -d DebugFlags [-1: enable all debug logs]\n"
|
|
" -D DebugLogFile [file path; use - for stderr]\n"
|
|
" -u \\Server\\Share [UNC prefix (single backslash)]\n"
|
|
" -p Directory [directory to expose as pass through file system]\n"
|
|
" -m MountPoint [X:|*|directory]\n";
|
|
|
|
fail(usage, L"" PROGNAME);
|
|
|
|
return STATUS_UNSUCCESSFUL;
|
|
|
|
#undef argtos
|
|
#undef argtol
|
|
}
|
|
|
|
static NTSTATUS SvcStop(FSP_SERVICE *Service)
|
|
{
|
|
PTFS *Ptfs = Service->UserContext;
|
|
|
|
FspFileSystemStopDispatcher(Ptfs->FileSystem);
|
|
PtfsDelete(Ptfs);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
int wmain(int argc, wchar_t **argv)
|
|
{
|
|
if (!NT_SUCCESS(FspLoad(0)))
|
|
return ERROR_DELAY_LOAD_FAILED;
|
|
|
|
return FspServiceRun(L"" PROGNAME, SvcStart, SvcStop, 0);
|
|
}
|