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mirror.c
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/*
Dokan : user-mode file system library for Windows
Copyright (C) 2020 - 2023 Google, Inc.
Copyright (C) 2015 - 2019 Adrien J. <liryna.stark@gmail.com> and Maxime C. <maxime@islog.com>
Copyright (C) 2007 - 2011 Hiroki Asakawa <info@dokan-dev.net>
http://dokan-dev.github.io
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include "../../dokan/dokan.h"
#include "../../dokan/fileinfo.h"
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <winbase.h>
// Enable Long Paths on Windows 10 version 1607 and later by changing
// the OS configuration (see Microsoft own documentation for the steps)
// and rebuild the mirror with the following line uncommented.
#define WIN10_ENABLE_LONG_PATH
#ifdef WIN10_ENABLE_LONG_PATH
//dirty but should be enough
#define DOKAN_MAX_PATH 32768
#else
#define DOKAN_MAX_PATH MAX_PATH
#endif // DEBUG
BOOL g_UseStdErr;
BOOL g_DebugMode;
BOOL g_CaseSensitive;
BOOL g_HasSeSecurityPrivilege;
BOOL g_ImpersonateCallerUser;
static void DbgPrint(LPCWSTR format, ...) {
if (g_DebugMode) {
const WCHAR *outputString;
WCHAR *buffer = NULL;
size_t length;
va_list argp;
va_start(argp, format);
length = _vscwprintf(format, argp) + 1;
buffer = _malloca(length * sizeof(WCHAR));
if (buffer) {
vswprintf_s(buffer, length, format, argp);
outputString = buffer;
} else {
outputString = format;
}
if (g_UseStdErr)
fputws(outputString, stderr);
else
OutputDebugStringW(outputString);
if (buffer)
_freea(buffer);
va_end(argp);
if (g_UseStdErr)
fflush(stderr);
}
}
static WCHAR gRootDirectory[DOKAN_MAX_PATH] = L"C:";
static WCHAR gMountPoint[DOKAN_MAX_PATH] = L"M:\\";
static WCHAR gUNCName[DOKAN_MAX_PATH] = L"";
static WCHAR gVolumeName[MAX_PATH + 1] = L"DOKAN";
static void GetFilePath(PWCHAR filePath, ULONG numberOfElements,
LPCWSTR FileName) {
wcsncpy_s(filePath, numberOfElements, gRootDirectory, wcslen(gRootDirectory));
wcsncat_s(filePath, numberOfElements, FileName, wcslen(FileName));
}
static void PrintUserName(PDOKAN_FILE_INFO DokanFileInfo) {
HANDLE handle;
UCHAR buffer[1024];
DWORD returnLength;
WCHAR accountName[256];
WCHAR domainName[256];
DWORD accountLength = sizeof(accountName) / sizeof(WCHAR);
DWORD domainLength = sizeof(domainName) / sizeof(WCHAR);
PTOKEN_USER tokenUser;
SID_NAME_USE snu;
if (!g_DebugMode)
return;
handle = DokanOpenRequestorToken(DokanFileInfo);
if (handle == INVALID_HANDLE_VALUE) {
DbgPrint(L" DokanOpenRequestorToken failed\n");
return;
}
if (!GetTokenInformation(handle, TokenUser, buffer, sizeof(buffer),
&returnLength)) {
DbgPrint(L" GetTokenInformaiton failed: %d\n", GetLastError());
CloseHandle(handle);
return;
}
CloseHandle(handle);
tokenUser = (PTOKEN_USER)buffer;
if (!LookupAccountSid(NULL, tokenUser->User.Sid, accountName, &accountLength,
domainName, &domainLength, &snu)) {
DbgPrint(L" LookupAccountSid failed: %d\n", GetLastError());
return;
}
DbgPrint(L" AccountName: %s, DomainName: %s\n", accountName, domainName);
}
static BOOL AddSeSecurityNamePrivilege() {
HANDLE token = 0;
DbgPrint(
L"## Attempting to add SE_SECURITY_NAME privilege to process token ##\n");
DWORD err;
LUID luid;
if (!LookupPrivilegeValue(0, SE_SECURITY_NAME, &luid)) {
err = GetLastError();
if (err != ERROR_SUCCESS) {
DbgPrint(L" failed: Unable to lookup privilege value. error = %u\n",
err);
return FALSE;
}
}
LUID_AND_ATTRIBUTES attr;
attr.Attributes = SE_PRIVILEGE_ENABLED;
attr.Luid = luid;
TOKEN_PRIVILEGES priv;
priv.PrivilegeCount = 1;
priv.Privileges[0] = attr;
if (!OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &token)) {
err = GetLastError();
if (err != ERROR_SUCCESS) {
DbgPrint(L" failed: Unable obtain process token. error = %u\n", err);
return FALSE;
}
}
TOKEN_PRIVILEGES oldPriv;
DWORD retSize;
AdjustTokenPrivileges(token, FALSE, &priv, sizeof(TOKEN_PRIVILEGES), &oldPriv,
&retSize);
err = GetLastError();
if (err != ERROR_SUCCESS) {
DbgPrint(L" failed: Unable to adjust token privileges: %u\n", err);
CloseHandle(token);
return FALSE;
}
BOOL privAlreadyPresent = FALSE;
for (unsigned int i = 0; i < oldPriv.PrivilegeCount; i++) {
if (oldPriv.Privileges[i].Luid.HighPart == luid.HighPart &&
oldPriv.Privileges[i].Luid.LowPart == luid.LowPart) {
privAlreadyPresent = TRUE;
break;
}
}
DbgPrint(privAlreadyPresent ? L" success: privilege already present\n"
: L" success: privilege added\n");
if (token)
CloseHandle(token);
return TRUE;
}
#define MirrorCheckFlag(val, flag) \
if (val & flag) { \
DbgPrint(L"\t" L#flag L"\n"); \
}
static NTSTATUS DOKAN_CALLBACK
MirrorCreateFile(LPCWSTR FileName, PDOKAN_IO_SECURITY_CONTEXT SecurityContext,
ACCESS_MASK DesiredAccess, ULONG FileAttributes,
ULONG ShareAccess, ULONG CreateDisposition,
ULONG CreateOptions, PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle;
DWORD fileAttr;
NTSTATUS status = STATUS_SUCCESS;
DWORD creationDisposition;
DWORD fileAttributesAndFlags;
DWORD error = 0;
SECURITY_ATTRIBUTES securityAttrib;
ACCESS_MASK genericDesiredAccess;
// userTokenHandle is for Impersonate Caller User Option
HANDLE userTokenHandle = INVALID_HANDLE_VALUE;
securityAttrib.nLength = sizeof(securityAttrib);
securityAttrib.lpSecurityDescriptor =
SecurityContext->AccessState.SecurityDescriptor;
securityAttrib.bInheritHandle = FALSE;
DokanMapKernelToUserCreateFileFlags(
DesiredAccess, FileAttributes, CreateOptions, CreateDisposition,
&genericDesiredAccess, &fileAttributesAndFlags, &creationDisposition);
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"CreateFile : %s\n", filePath);
PrintUserName(DokanFileInfo);
DbgPrint(L"\tShareMode = 0x%x\n", ShareAccess);
MirrorCheckFlag(ShareAccess, FILE_SHARE_READ);
MirrorCheckFlag(ShareAccess, FILE_SHARE_WRITE);
MirrorCheckFlag(ShareAccess, FILE_SHARE_DELETE);
DbgPrint(L"\tDesiredAccess = 0x%x\n", DesiredAccess);
MirrorCheckFlag(DesiredAccess, GENERIC_READ);
MirrorCheckFlag(DesiredAccess, GENERIC_WRITE);
MirrorCheckFlag(DesiredAccess, GENERIC_EXECUTE);
MirrorCheckFlag(DesiredAccess, DELETE);
MirrorCheckFlag(DesiredAccess, FILE_READ_DATA);
MirrorCheckFlag(DesiredAccess, FILE_READ_ATTRIBUTES);
MirrorCheckFlag(DesiredAccess, FILE_READ_EA);
MirrorCheckFlag(DesiredAccess, READ_CONTROL);
MirrorCheckFlag(DesiredAccess, FILE_WRITE_DATA);
MirrorCheckFlag(DesiredAccess, FILE_WRITE_ATTRIBUTES);
MirrorCheckFlag(DesiredAccess, FILE_WRITE_EA);
MirrorCheckFlag(DesiredAccess, FILE_APPEND_DATA);
MirrorCheckFlag(DesiredAccess, WRITE_DAC);
MirrorCheckFlag(DesiredAccess, WRITE_OWNER);
MirrorCheckFlag(DesiredAccess, SYNCHRONIZE);
MirrorCheckFlag(DesiredAccess, FILE_EXECUTE);
MirrorCheckFlag(DesiredAccess, STANDARD_RIGHTS_READ);
MirrorCheckFlag(DesiredAccess, STANDARD_RIGHTS_WRITE);
MirrorCheckFlag(DesiredAccess, STANDARD_RIGHTS_EXECUTE);
// When filePath is a directory, needs to change the flag so that the file can
// be opened.
fileAttr = GetFileAttributes(filePath);
if (fileAttr != INVALID_FILE_ATTRIBUTES &&
fileAttr & FILE_ATTRIBUTE_DIRECTORY) {
if (CreateOptions & FILE_NON_DIRECTORY_FILE) {
DbgPrint(L"\tCannot open a dir as a file\n");
return STATUS_FILE_IS_A_DIRECTORY;
}
DokanFileInfo->IsDirectory = TRUE;
// Needed by FindFirstFile to list files in it
// TODO: use ReOpenFile in MirrorFindFiles to set share read temporary
ShareAccess |= FILE_SHARE_READ;
}
DbgPrint(L"\tFlagsAndAttributes = 0x%x\n", fileAttributesAndFlags);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_ARCHIVE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_COMPRESSED);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_DEVICE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_DIRECTORY);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_ENCRYPTED);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_HIDDEN);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_INTEGRITY_STREAM);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_NORMAL);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_NOT_CONTENT_INDEXED);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_NO_SCRUB_DATA);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_OFFLINE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_READONLY);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_REPARSE_POINT);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_SPARSE_FILE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_SYSTEM);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_TEMPORARY);
MirrorCheckFlag(fileAttributesAndFlags, FILE_ATTRIBUTE_VIRTUAL);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_WRITE_THROUGH);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_OVERLAPPED);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_NO_BUFFERING);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_RANDOM_ACCESS);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_SEQUENTIAL_SCAN);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_DELETE_ON_CLOSE);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_BACKUP_SEMANTICS);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_POSIX_SEMANTICS);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_OPEN_REPARSE_POINT);
MirrorCheckFlag(fileAttributesAndFlags, FILE_FLAG_OPEN_NO_RECALL);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_ANONYMOUS);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_IDENTIFICATION);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_IMPERSONATION);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_DELEGATION);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_CONTEXT_TRACKING);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_EFFECTIVE_ONLY);
MirrorCheckFlag(fileAttributesAndFlags, SECURITY_SQOS_PRESENT);
if (g_CaseSensitive)
fileAttributesAndFlags |= FILE_FLAG_POSIX_SEMANTICS;
if (creationDisposition == CREATE_NEW) {
DbgPrint(L"\tCREATE_NEW\n");
} else if (creationDisposition == OPEN_ALWAYS) {
DbgPrint(L"\tOPEN_ALWAYS\n");
} else if (creationDisposition == CREATE_ALWAYS) {
DbgPrint(L"\tCREATE_ALWAYS\n");
} else if (creationDisposition == OPEN_EXISTING) {
DbgPrint(L"\tOPEN_EXISTING\n");
} else if (creationDisposition == TRUNCATE_EXISTING) {
DbgPrint(L"\tTRUNCATE_EXISTING\n");
} else {
DbgPrint(L"\tUNKNOWN creationDisposition!\n");
}
if (g_ImpersonateCallerUser) {
userTokenHandle = DokanOpenRequestorToken(DokanFileInfo);
if (userTokenHandle == INVALID_HANDLE_VALUE) {
DbgPrint(L" DokanOpenRequestorToken failed\n");
// Should we return some error?
}
}
if (DokanFileInfo->IsDirectory) {
// It is a create directory request
if (creationDisposition == CREATE_NEW ||
creationDisposition == OPEN_ALWAYS) {
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// if g_ImpersonateCallerUser option is on, call the ImpersonateLoggedOnUser function.
if (!ImpersonateLoggedOnUser(userTokenHandle)) {
// handle the error if failed to impersonate
DbgPrint(L"\tImpersonateLoggedOnUser failed.\n");
}
}
// We create folder
if (!CreateDirectory(filePath, &securityAttrib)) {
error = GetLastError();
// Fail to create folder for OPEN_ALWAYS is not an error
if (error != ERROR_ALREADY_EXISTS ||
creationDisposition == CREATE_NEW) {
DbgPrint(L"\terror code = %d\n\n", error);
status = DokanNtStatusFromWin32(error);
}
}
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// Clean Up operation for impersonate
DWORD lastError = GetLastError();
if (status != STATUS_SUCCESS) //Keep the handle open for CreateFile
CloseHandle(userTokenHandle);
RevertToSelf();
SetLastError(lastError);
}
}
if (status == STATUS_SUCCESS) {
//Check first if we're trying to open a file as a directory.
if (fileAttr != INVALID_FILE_ATTRIBUTES &&
!(fileAttr & FILE_ATTRIBUTE_DIRECTORY) &&
(CreateOptions & FILE_DIRECTORY_FILE)) {
return STATUS_NOT_A_DIRECTORY;
}
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// if g_ImpersonateCallerUser option is on, call the ImpersonateLoggedOnUser function.
if (!ImpersonateLoggedOnUser(userTokenHandle)) {
// handle the error if failed to impersonate
DbgPrint(L"\tImpersonateLoggedOnUser failed.\n");
}
}
// FILE_FLAG_BACKUP_SEMANTICS is required for opening directory handles
handle =
CreateFile(filePath, genericDesiredAccess, ShareAccess,
&securityAttrib, OPEN_EXISTING,
fileAttributesAndFlags | FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// Clean Up operation for impersonate
DWORD lastError = GetLastError();
CloseHandle(userTokenHandle);
RevertToSelf();
SetLastError(lastError);
}
if (handle == INVALID_HANDLE_VALUE) {
error = GetLastError();
DbgPrint(L"\terror code = %d\n\n", error);
status = DokanNtStatusFromWin32(error);
} else {
DokanFileInfo->Context =
(ULONG64)handle; // save the file handle in Context
// Open succeed but we need to inform the driver
// that the dir open and not created by returning STATUS_OBJECT_NAME_COLLISION
if (creationDisposition == OPEN_ALWAYS &&
fileAttr != INVALID_FILE_ATTRIBUTES)
return STATUS_OBJECT_NAME_COLLISION;
}
}
} else {
// It is a create file request
// Cannot overwrite a hidden or system file if flag not set
if (fileAttr != INVALID_FILE_ATTRIBUTES &&
((!(fileAttributesAndFlags & FILE_ATTRIBUTE_HIDDEN) &&
(fileAttr & FILE_ATTRIBUTE_HIDDEN)) ||
(!(fileAttributesAndFlags & FILE_ATTRIBUTE_SYSTEM) &&
(fileAttr & FILE_ATTRIBUTE_SYSTEM))) &&
(creationDisposition == TRUNCATE_EXISTING ||
creationDisposition == CREATE_ALWAYS))
return STATUS_ACCESS_DENIED;
// Cannot delete a read only file
if ((fileAttr != INVALID_FILE_ATTRIBUTES &&
(fileAttr & FILE_ATTRIBUTE_READONLY) ||
(fileAttributesAndFlags & FILE_ATTRIBUTE_READONLY)) &&
(fileAttributesAndFlags & FILE_FLAG_DELETE_ON_CLOSE))
return STATUS_CANNOT_DELETE;
// Truncate should always be used with write access
if (creationDisposition == TRUNCATE_EXISTING)
genericDesiredAccess |= GENERIC_WRITE;
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// if g_ImpersonateCallerUser option is on, call the ImpersonateLoggedOnUser function.
if (!ImpersonateLoggedOnUser(userTokenHandle)) {
// handle the error if failed to impersonate
DbgPrint(L"\tImpersonateLoggedOnUser failed.\n");
}
}
handle =
CreateFile(filePath, genericDesiredAccess, ShareAccess, &securityAttrib,
creationDisposition, fileAttributesAndFlags, NULL);
if (g_ImpersonateCallerUser && userTokenHandle != INVALID_HANDLE_VALUE) {
// Clean Up operation for impersonate
DWORD lastError = GetLastError();
CloseHandle(userTokenHandle);
RevertToSelf();
SetLastError(lastError);
}
if (handle == INVALID_HANDLE_VALUE) {
error = GetLastError();
DbgPrint(L"\terror code = %d\n\n", error);
status = DokanNtStatusFromWin32(error);
} else {
//Need to update FileAttributes with previous when Overwrite file
if (fileAttr != INVALID_FILE_ATTRIBUTES &&
creationDisposition == TRUNCATE_EXISTING) {
SetFileAttributes(filePath, fileAttributesAndFlags | fileAttr);
}
DokanFileInfo->Context =
(ULONG64)handle; // save the file handle in Context
if (creationDisposition == OPEN_ALWAYS ||
creationDisposition == CREATE_ALWAYS) {
error = GetLastError();
if (error == ERROR_ALREADY_EXISTS) {
DbgPrint(L"\tOpen an already existing file\n");
// Open succeed but we need to inform the driver
// that the file open and not created by returning STATUS_OBJECT_NAME_COLLISION
status = STATUS_OBJECT_NAME_COLLISION;
}
}
}
}
DbgPrint(L"\n");
return status;
}
#pragma warning(push)
#pragma warning(disable : 4305)
static void DOKAN_CALLBACK MirrorCloseFile(LPCWSTR FileName,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
if (DokanFileInfo->Context) {
DbgPrint(L"CloseFile: %s\n", filePath);
DbgPrint(L"\terror : not cleanuped file\n\n");
CloseHandle((HANDLE)DokanFileInfo->Context);
DokanFileInfo->Context = 0;
} else {
DbgPrint(L"Close: %s\n\n", filePath);
}
}
static void DOKAN_CALLBACK MirrorCleanup(LPCWSTR FileName,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
if (DokanFileInfo->Context) {
DbgPrint(L"Cleanup: %s\n\n", filePath);
CloseHandle((HANDLE)(DokanFileInfo->Context));
DokanFileInfo->Context = 0;
} else {
DbgPrint(L"Cleanup: %s\n\tinvalid handle\n\n", filePath);
}
if (DokanFileInfo->DeleteOnClose) {
// Should already be deleted by CloseHandle
// if open with FILE_FLAG_DELETE_ON_CLOSE
DbgPrint(L"\tDeleteOnClose\n");
if (DokanFileInfo->IsDirectory) {
DbgPrint(L" DeleteDirectory ");
if (!RemoveDirectory(filePath)) {
DbgPrint(L"error code = %d\n\n", GetLastError());
} else {
DbgPrint(L"success\n\n");
}
} else {
DbgPrint(L" DeleteFile ");
if (DeleteFile(filePath) == 0) {
DbgPrint(L" error code = %d\n\n", GetLastError());
} else {
DbgPrint(L"success\n\n");
}
}
}
}
static NTSTATUS DOKAN_CALLBACK MirrorReadFile(LPCWSTR FileName, LPVOID Buffer,
DWORD BufferLength,
LPDWORD ReadLength,
LONGLONG Offset,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
ULONG offset = (ULONG)Offset;
BOOL opened = FALSE;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"ReadFile : %s\n", filePath);
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle, cleanuped?\n");
handle = CreateFile(filePath, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, 0, NULL);
if (handle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tCreateFile error : %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
opened = TRUE;
}
OVERLAPPED overlap;
memset(&overlap, 0, sizeof(OVERLAPPED));
overlap.Offset = Offset & 0xFFFFFFFF;
overlap.OffsetHigh = (Offset >> 32) & 0xFFFFFFFF;
if (!ReadFile(handle, Buffer, BufferLength, ReadLength, &overlap)) {
DWORD error = GetLastError();
DbgPrint(L"\tread error = %u, buffer length = %d, read length = %d\n\n",
error, BufferLength, *ReadLength);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
} else {
DbgPrint(L"\tByte to read: %d, Byte read %d, offset %d\n\n", BufferLength,
*ReadLength, offset);
}
if (opened)
CloseHandle(handle);
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK MirrorWriteFile(LPCWSTR FileName, LPCVOID Buffer,
DWORD NumberOfBytesToWrite,
LPDWORD NumberOfBytesWritten,
LONGLONG Offset,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
BOOL opened = FALSE;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"WriteFile : %s, offset %I64d, length %d\n", filePath, Offset,
NumberOfBytesToWrite);
// reopen the file
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle, cleanuped?\n");
handle = CreateFile(filePath, GENERIC_WRITE, FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, 0, NULL);
if (handle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tCreateFile error : %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
opened = TRUE;
}
UINT64 fileSize = 0;
DWORD fileSizeLow = 0;
DWORD fileSizeHigh = 0;
fileSizeLow = GetFileSize(handle, &fileSizeHigh);
if (fileSizeLow == INVALID_FILE_SIZE) {
DWORD error = GetLastError();
DbgPrint(L"\tcan not get a file size error = %d\n", error);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
}
fileSize = ((UINT64)fileSizeHigh << 32) | fileSizeLow;
OVERLAPPED overlap;
memset(&overlap, 0, sizeof(OVERLAPPED));
if (DokanFileInfo->WriteToEndOfFile) {
overlap.Offset = 0xFFFFFFFF;
overlap.OffsetHigh = 0xFFFFFFFF;
} else {
// Paging IO cannot write after allocate file size.
if (DokanFileInfo->PagingIo) {
if ((UINT64)Offset >= fileSize) {
*NumberOfBytesWritten = 0;
if (opened)
CloseHandle(handle);
return STATUS_SUCCESS;
}
if (((UINT64)Offset + NumberOfBytesToWrite) > fileSize) {
UINT64 bytes = fileSize - Offset;
if (bytes >> 32) {
NumberOfBytesToWrite = (DWORD)(bytes & 0xFFFFFFFFUL);
} else {
NumberOfBytesToWrite = (DWORD)bytes;
}
}
}
if ((UINT64)Offset > fileSize) {
// In the mirror sample helperZeroFileData is not necessary. NTFS will
// zero a hole.
// But if user's file system is different from NTFS( or other Windows's
// file systems ) then users will have to zero the hole themselves.
}
overlap.Offset = Offset & 0xFFFFFFFF;
overlap.OffsetHigh = (Offset >> 32) & 0xFFFFFFFF;
}
if (!WriteFile(handle, Buffer, NumberOfBytesToWrite, NumberOfBytesWritten,
&overlap)) {
DWORD error = GetLastError();
DbgPrint(L"\twrite error = %u, buffer length = %d, write length = %d\n",
error, NumberOfBytesToWrite, *NumberOfBytesWritten);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
} else {
DbgPrint(L"\twrite %d, offset %I64d\n\n", *NumberOfBytesWritten, Offset);
}
// close the file when it is reopened
if (opened)
CloseHandle(handle);
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorFlushFileBuffers(LPCWSTR FileName, PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"FlushFileBuffers : %s\n", filePath);
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle\n\n");
return STATUS_SUCCESS;
}
if (FlushFileBuffers(handle)) {
return STATUS_SUCCESS;
} else {
DWORD error = GetLastError();
DbgPrint(L"\tflush error code = %d\n", error);
return DokanNtStatusFromWin32(error);
}
}
static NTSTATUS DOKAN_CALLBACK MirrorGetFileInformation(
LPCWSTR FileName, LPBY_HANDLE_FILE_INFORMATION HandleFileInformation,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
BOOL opened = FALSE;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"GetFileInfo : %s\n", filePath);
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle, cleanuped?\n");
handle = CreateFile(filePath, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, 0, NULL);
if (handle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tCreateFile error : %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
opened = TRUE;
}
if (!GetFileInformationByHandle(handle, HandleFileInformation)) {
DbgPrint(L"\terror code = %d\n", GetLastError());
// FileName is a root directory
// in this case, FindFirstFile can't get directory information
if (wcslen(FileName) == 1) {
DbgPrint(L" root dir\n");
HandleFileInformation->dwFileAttributes = GetFileAttributes(filePath);
} else {
WIN32_FIND_DATAW find;
ZeroMemory(&find, sizeof(WIN32_FIND_DATAW));
HANDLE findHandle = FindFirstFile(filePath, &find);
if (findHandle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tFindFirstFile error code = %d\n\n", error);
if (opened)
CloseHandle(handle);
return DokanNtStatusFromWin32(error);
}
HandleFileInformation->dwFileAttributes = find.dwFileAttributes;
HandleFileInformation->ftCreationTime = find.ftCreationTime;
HandleFileInformation->ftLastAccessTime = find.ftLastAccessTime;
HandleFileInformation->ftLastWriteTime = find.ftLastWriteTime;
HandleFileInformation->nFileSizeHigh = find.nFileSizeHigh;
HandleFileInformation->nFileSizeLow = find.nFileSizeLow;
DbgPrint(L"\tFindFiles OK, file size = %d\n", find.nFileSizeLow);
FindClose(findHandle);
}
} else {
DbgPrint(L"\tGetFileInformationByHandle success, file size = %d\n",
HandleFileInformation->nFileSizeLow);
}
DbgPrint(L"FILE ATTRIBUTE = %d\n", HandleFileInformation->dwFileAttributes);
if (opened)
CloseHandle(handle);
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorFindFiles(LPCWSTR FileName,
PFillFindData FillFindData, // function pointer
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
size_t fileLen;
HANDLE hFind;
WIN32_FIND_DATAW findData;
DWORD error;
int count = 0;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"FindFiles : %s\n", filePath);
fileLen = wcslen(filePath);
if (filePath[fileLen - 1] != L'\\') {
filePath[fileLen++] = L'\\';
}
if (fileLen + 1 >= DOKAN_MAX_PATH)
return STATUS_BUFFER_OVERFLOW;
filePath[fileLen] = L'*';
filePath[fileLen + 1] = L'\0';
hFind = FindFirstFile(filePath, &findData);
if (hFind == INVALID_HANDLE_VALUE) {
error = GetLastError();
DbgPrint(L"\tinvalid file handle. Error is %u\n\n", error);
return DokanNtStatusFromWin32(error);
}
// Root folder does not have . and .. folder - we remove them
BOOLEAN rootFolder = (wcscmp(FileName, L"\\") == 0);
do {
if (!rootFolder || (wcscmp(findData.cFileName, L".") != 0 &&
wcscmp(findData.cFileName, L"..") != 0))
FillFindData(&findData, DokanFileInfo);
count++;
} while (FindNextFile(hFind, &findData) != 0);
error = GetLastError();
FindClose(hFind);
if (error != ERROR_NO_MORE_FILES) {
DbgPrint(L"\tFindNextFile error. Error is %u\n\n", error);
return DokanNtStatusFromWin32(error);
}
DbgPrint(L"\tFindFiles return %d entries in %s\n\n", count, filePath);
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorDeleteFile(LPCWSTR FileName, PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle = (HANDLE)DokanFileInfo->Context;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"DeleteFile %s - %d\n", filePath, DokanFileInfo->DeleteOnClose);
DWORD dwAttrib = GetFileAttributes(filePath);
if (dwAttrib != INVALID_FILE_ATTRIBUTES &&
(dwAttrib & FILE_ATTRIBUTE_DIRECTORY))
return STATUS_ACCESS_DENIED;
if (handle && handle != INVALID_HANDLE_VALUE) {
FILE_DISPOSITION_INFO fdi;
fdi.DeleteFile = DokanFileInfo->DeleteOnClose;
if (!SetFileInformationByHandle(handle, FileDispositionInfo, &fdi,
sizeof(FILE_DISPOSITION_INFO)))
return DokanNtStatusFromWin32(GetLastError());
}
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorDeleteDirectory(LPCWSTR FileName, PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
// HANDLE handle = (HANDLE)DokanFileInfo->Context;
HANDLE hFind;
WIN32_FIND_DATAW findData;
size_t fileLen;
ZeroMemory(filePath, sizeof(filePath));
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"DeleteDirectory %s - %d\n", filePath,
DokanFileInfo->DeleteOnClose);
if (!DokanFileInfo->DeleteOnClose)
//Dokan notify that the file is requested not to be deleted.
return STATUS_SUCCESS;
fileLen = wcslen(filePath);
if (filePath[fileLen - 1] != L'\\') {
filePath[fileLen++] = L'\\';
}
if (fileLen + 1 >= DOKAN_MAX_PATH)
return STATUS_BUFFER_OVERFLOW;
filePath[fileLen] = L'*';
filePath[fileLen + 1] = L'\0';
hFind = FindFirstFile(filePath, &findData);
if (hFind == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
DbgPrint(L"\tDeleteDirectory error code = %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
do {
if (wcscmp(findData.cFileName, L"..") != 0 &&
wcscmp(findData.cFileName, L".") != 0) {
FindClose(hFind);
DbgPrint(L"\tDirectory is not empty: %s\n", findData.cFileName);
return STATUS_DIRECTORY_NOT_EMPTY;
}
} while (FindNextFile(hFind, &findData) != 0);
DWORD error = GetLastError();
FindClose(hFind);
if (error != ERROR_NO_MORE_FILES) {
DbgPrint(L"\tDeleteDirectory error code = %d\n\n", error);
return DokanNtStatusFromWin32(error);
}
return STATUS_SUCCESS;
}
static NTSTATUS DOKAN_CALLBACK
MirrorMoveFile(LPCWSTR FileName, // existing file name
LPCWSTR NewFileName, BOOL ReplaceIfExisting,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
WCHAR newFilePath[DOKAN_MAX_PATH];
HANDLE handle;
DWORD bufferSize;
BOOL result;
size_t newFilePathLen;
PFILE_RENAME_INFO renameInfo = NULL;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
if (wcslen(NewFileName) && NewFileName[0] != ':') {
GetFilePath(newFilePath, DOKAN_MAX_PATH, NewFileName);
} else {
// For a stream rename, FileRenameInfo expect the FileName param without the filename
// like :<stream name>:<stream type>
wcsncpy_s(newFilePath, DOKAN_MAX_PATH, NewFileName, wcslen(NewFileName));
}
DbgPrint(L"MoveFile %s -> %s\n\n", filePath, newFilePath);
handle = (HANDLE)DokanFileInfo->Context;
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle\n\n");
return STATUS_INVALID_HANDLE;
}
newFilePathLen = wcslen(newFilePath);
// the PFILE_RENAME_INFO struct has space for one WCHAR for the name at
// the end, so that
// accounts for the null terminator
bufferSize = (DWORD)(sizeof(FILE_RENAME_INFO) +
newFilePathLen * sizeof(newFilePath[0]));
renameInfo = (PFILE_RENAME_INFO)malloc(bufferSize);
if (!renameInfo) {
return STATUS_BUFFER_OVERFLOW;
}
ZeroMemory(renameInfo, bufferSize);
renameInfo->ReplaceIfExists =
ReplaceIfExisting
? TRUE
: FALSE; // some warning about converting BOOL to BOOLEAN
renameInfo->RootDirectory = NULL; // hope it is never needed, shouldn't be
renameInfo->FileNameLength =
(DWORD)newFilePathLen *
sizeof(newFilePath[0]); // they want length in bytes
wcscpy_s(renameInfo->FileName, newFilePathLen + 1, newFilePath);
result = SetFileInformationByHandle(handle, FileRenameInfo, renameInfo,
bufferSize);
free(renameInfo);
if (result) {
return STATUS_SUCCESS;
} else {
DWORD error = GetLastError();
DbgPrint(L"\tMoveFile error = %u\n", error);
return DokanNtStatusFromWin32(error);
}
}
static NTSTATUS DOKAN_CALLBACK MirrorLockFile(LPCWSTR FileName,
LONGLONG ByteOffset,
LONGLONG Length,
PDOKAN_FILE_INFO DokanFileInfo) {
WCHAR filePath[DOKAN_MAX_PATH];
HANDLE handle;
LARGE_INTEGER offset;
LARGE_INTEGER length;
GetFilePath(filePath, DOKAN_MAX_PATH, FileName);
DbgPrint(L"LockFile %s\n", filePath);
handle = (HANDLE)DokanFileInfo->Context;
if (!handle || handle == INVALID_HANDLE_VALUE) {
DbgPrint(L"\tinvalid handle\n\n");
return STATUS_INVALID_HANDLE;