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fileinfo.c
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fileinfo.c
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/**
* @file sys/fileinfo.c
*
* @copyright 2015-2020 Bill Zissimopoulos
*/
/*
* This file is part of WinFsp.
*
* You can redistribute it and/or modify it under the terms of the GNU
* General Public License version 3 as published by the Free Software
* Foundation.
*
* Licensees holding a valid commercial license may use this software
* in accordance with the commercial license agreement provided in
* conjunction with the software. The terms and conditions of any such
* commercial license agreement shall govern, supersede, and render
* ineffective any application of the GPLv3 license to this software,
* notwithstanding of any reference thereto in the software or
* associated repository.
*/
#include <sys/driver.h>
static NTSTATUS FspFsvolQueryAllInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryAttributeTagInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryBasicInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryEaInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryInternalInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd);
static NTSTATUS FspFsvolQueryNameInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd);
static NTSTATUS FspFsvolQueryNetworkOpenInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryPositionInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd);
static NTSTATUS FspFsvolQueryStandardInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryStatBaseInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryStatLxBaseInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo);
static NTSTATUS FspFsvolQueryStatLxEaInformation(
PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd);
static NTSTATUS FspFsvolQueryStreamInformationCopy(
FSP_FSCTL_STREAM_INFO *StreamInfoBuffer, ULONG StreamInfoBufferSize,
PVOID DestBuf, PULONG PDestLen);
static NTSTATUS FspFsvolQueryStreamInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolQueryStreamInformationSuccess(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
static NTSTATUS FspFsvolQueryInformationEffectiveAccess(
PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
PACCESS_MASK PEffectiveAccess);
static NTSTATUS FspFsvolQueryInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolQueryInformationComplete;
static FSP_IOP_REQUEST_FINI FspFsvolQueryInformationRequestFini;
static NTSTATUS FspFsvolSetAllocationInformation(PFILE_OBJECT FileObject,
PVOID Buffer, ULONG Length,
FSP_FSCTL_TRANSACT_REQ *Request, const FSP_FSCTL_TRANSACT_RSP *Response);
static NTSTATUS FspFsvolSetBasicInformation(PFILE_OBJECT FileObject,
PVOID Buffer, ULONG Length,
FSP_FSCTL_TRANSACT_REQ *Request, const FSP_FSCTL_TRANSACT_RSP *Response);
static NTSTATUS FspFsvolSetEndOfFileInformation(PFILE_OBJECT FileObject,
PVOID Buffer, ULONG Length,
FSP_FSCTL_TRANSACT_REQ *Request, const FSP_FSCTL_TRANSACT_RSP *Response);
static NTSTATUS FspFsvolSetPositionInformation(PFILE_OBJECT FileObject,
PVOID Buffer, ULONG Length);
static NTSTATUS FspFsvolSetDispositionInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolSetDispositionInformationSuccess(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
static NTSTATUS FspFsvolSetRenameInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolSetRenameInformationSuccess(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
static NTSTATUS FspFsvolSetInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOPREP_DISPATCH FspFsvolSetInformationPrepare;
FSP_IOCMPL_DISPATCH FspFsvolSetInformationComplete;
static FSP_IOP_REQUEST_FINI FspFsvolSetInformationRequestFini;
FSP_DRIVER_DISPATCH FspQueryInformation;
FSP_DRIVER_DISPATCH FspSetInformation;
FAST_IO_QUERY_BASIC_INFO FspFastIoQueryBasicInfo;
FAST_IO_QUERY_STANDARD_INFO FspFastIoQueryStandardInfo;
FAST_IO_QUERY_NETWORK_OPEN_INFO FspFastIoQueryNetworkOpenInfo;
FAST_IO_QUERY_OPEN FspFastIoQueryOpen;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvolQueryAllInformation)
#pragma alloc_text(PAGE, FspFsvolQueryAttributeTagInformation)
#pragma alloc_text(PAGE, FspFsvolQueryBasicInformation)
#pragma alloc_text(PAGE, FspFsvolQueryEaInformation)
#pragma alloc_text(PAGE, FspFsvolQueryInternalInformation)
#pragma alloc_text(PAGE, FspFsvolQueryNameInformation)
#pragma alloc_text(PAGE, FspFsvolQueryNetworkOpenInformation)
#pragma alloc_text(PAGE, FspFsvolQueryPositionInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStandardInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStatBaseInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStatLxBaseInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStatLxEaInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStreamInformationCopy)
#pragma alloc_text(PAGE, FspFsvolQueryStreamInformation)
#pragma alloc_text(PAGE, FspFsvolQueryStreamInformationSuccess)
#pragma alloc_text(PAGE, FspFsvolQueryInformationEffectiveAccess)
#pragma alloc_text(PAGE, FspFsvolQueryInformation)
#pragma alloc_text(PAGE, FspFsvolQueryInformationComplete)
#pragma alloc_text(PAGE, FspFsvolQueryInformationRequestFini)
#pragma alloc_text(PAGE, FspFsvolSetAllocationInformation)
#pragma alloc_text(PAGE, FspFsvolSetBasicInformation)
#pragma alloc_text(PAGE, FspFsvolSetEndOfFileInformation)
#pragma alloc_text(PAGE, FspFsvolSetPositionInformation)
#pragma alloc_text(PAGE, FspFsvolSetDispositionInformation)
#pragma alloc_text(PAGE, FspFsvolSetDispositionInformationSuccess)
#pragma alloc_text(PAGE, FspFsvolSetRenameInformation)
#pragma alloc_text(PAGE, FspFsvolSetRenameInformationSuccess)
#pragma alloc_text(PAGE, FspFsvolSetInformation)
#pragma alloc_text(PAGE, FspFsvolSetInformationPrepare)
#pragma alloc_text(PAGE, FspFsvolSetInformationComplete)
#pragma alloc_text(PAGE, FspFsvolSetInformationRequestFini)
#pragma alloc_text(PAGE, FspQueryInformation)
#pragma alloc_text(PAGE, FspSetInformation)
#pragma alloc_text(PAGE, FspFastIoQueryBasicInfo)
#pragma alloc_text(PAGE, FspFastIoQueryStandardInfo)
#pragma alloc_text(PAGE, FspFastIoQueryNetworkOpenInfo)
#pragma alloc_text(PAGE, FspFastIoQueryOpen)
#endif
enum
{
/* QueryInformation */
RequestFileNode = 0,
RequestInfoChangeNumber = 1,
RequestAllInformationResult = 2,
RequestAllInformationBuffer = 3,
/* SetInformation */
//RequestFileNode = 0,
RequestDeviceObject = 1,
/* Rename */
RequestSubjectContextOrAccessToken = 2,
RequestProcess = 3,
};
static NTSTATUS FspFsvolQueryAllInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
PFILE_ALL_INFORMATION Info = (PFILE_ALL_INFORMATION)*PBuffer;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
BOOLEAN DeletePending;
if (0 == FileInfo)
{
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
*PBuffer = (PVOID)&Info->NameInformation;
return FspFsvolQueryNameInformation(FileObject, PBuffer, BufferEnd);
}
DeletePending = 0 != FileNode->DeletePending;
MemoryBarrier();
Info->BasicInformation.CreationTime.QuadPart = FileInfo->CreationTime;
Info->BasicInformation.LastAccessTime.QuadPart = FileInfo->LastAccessTime;
Info->BasicInformation.LastWriteTime.QuadPart = FileInfo->LastWriteTime;
Info->BasicInformation.ChangeTime.QuadPart = FileInfo->ChangeTime;
Info->BasicInformation.FileAttributes = 0 != FileInfo->FileAttributes ?
FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
Info->StandardInformation.AllocationSize.QuadPart = FileInfo->AllocationSize;
Info->StandardInformation.EndOfFile.QuadPart = FileInfo->FileSize;
Info->StandardInformation.NumberOfLinks = 1;
Info->StandardInformation.DeletePending = DeletePending || FileObject->DeletePending;
Info->StandardInformation.Directory = FileNode->IsDirectory;
Info->InternalInformation.IndexNumber.QuadPart = FileNode->IndexNumber;
Info->EaInformation.EaSize =
FspFsvolDeviceExtension(FileNode->FsvolDeviceObject)->VolumeParams.ExtendedAttributes ?
FileInfo->EaSize : 0;
/* magic computations are courtesy of NTFS */
if (0 != Info->EaInformation.EaSize)
Info->EaInformation.EaSize += 4;
Info->PositionInformation.CurrentByteOffset = FileObject->CurrentByteOffset;
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryAttributeTagInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
PFILE_ATTRIBUTE_TAG_INFORMATION Info = (PFILE_ATTRIBUTE_TAG_INFORMATION)*PBuffer;
if (0 == FileInfo)
{
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
return STATUS_SUCCESS;
}
Info->FileAttributes = 0 != FileInfo->FileAttributes ?
FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
Info->ReparseTag = FileInfo->ReparseTag;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryBasicInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
PFILE_BASIC_INFORMATION Info = (PFILE_BASIC_INFORMATION)*PBuffer;
if (0 == FileInfo)
{
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
return STATUS_SUCCESS;
}
Info->CreationTime.QuadPart = FileInfo->CreationTime;
Info->LastAccessTime.QuadPart = FileInfo->LastAccessTime;
Info->LastWriteTime.QuadPart = FileInfo->LastWriteTime;
Info->ChangeTime.QuadPart = FileInfo->ChangeTime;
Info->FileAttributes = 0 != FileInfo->FileAttributes ?
FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryEaInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
PFILE_EA_INFORMATION Info = (PFILE_EA_INFORMATION)*PBuffer;
if (0 == FileInfo)
{
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
return STATUS_SUCCESS;
}
FSP_FILE_NODE *FileNode = FileObject->FsContext;
Info->EaSize =
FspFsvolDeviceExtension(FileNode->FsvolDeviceObject)->VolumeParams.ExtendedAttributes ?
FileInfo->EaSize : 0;
/* magic computations are courtesy of NTFS */
if (0 != Info->EaSize)
Info->EaSize += 4;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryInternalInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd)
{
PAGED_CODE();
PFILE_INTERNAL_INFORMATION Info = (PFILE_INTERNAL_INFORMATION)*PBuffer;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
Info->IndexNumber.QuadPart = FileNode->IndexNumber;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryNameInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd)
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
PFILE_NAME_INFORMATION Info = (PFILE_NAME_INFORMATION)*PBuffer;
PUINT8 Buffer = (PUINT8)Info->FileName;
ULONG CopyLength;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
PDEVICE_OBJECT FsvolDeviceObject = FileNode->FsvolDeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
if ((PVOID)((PUINT8)Info + FIELD_OFFSET(FILE_NAME_INFORMATION, FileName)) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
FspFileNodeAcquireShared(FileNode, Main);
Info->FileNameLength = FsvolDeviceExtension->VolumePrefix.Length + FileNode->FileName.Length;
CopyLength = FsvolDeviceExtension->VolumePrefix.Length;
if (Buffer + CopyLength > (PUINT8)BufferEnd)
{
CopyLength = (ULONG)((PUINT8)BufferEnd - Buffer);
Result = STATUS_BUFFER_OVERFLOW;
}
RtlCopyMemory(Buffer, FsvolDeviceExtension->VolumePrefix.Buffer, CopyLength);
Buffer += CopyLength;
CopyLength = FileNode->FileName.Length;
if (Buffer + CopyLength > (PUINT8)BufferEnd)
{
CopyLength = (ULONG)((PUINT8)BufferEnd - Buffer);
Result = STATUS_BUFFER_OVERFLOW;
}
RtlCopyMemory(Buffer, FileNode->FileName.Buffer, CopyLength);
Buffer += CopyLength;
FspFileNodeRelease(FileNode, Main);
*PBuffer = Buffer;
return Result;
}
static NTSTATUS FspFsvolQueryNetworkOpenInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
PFILE_NETWORK_OPEN_INFORMATION Info = (PFILE_NETWORK_OPEN_INFORMATION)*PBuffer;
if (0 == FileInfo)
{
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
return STATUS_SUCCESS;
}
Info->AllocationSize.QuadPart = FileInfo->AllocationSize;
Info->EndOfFile.QuadPart = FileInfo->FileSize;
Info->CreationTime.QuadPart = FileInfo->CreationTime;
Info->LastAccessTime.QuadPart = FileInfo->LastAccessTime;
Info->LastWriteTime.QuadPart = FileInfo->LastWriteTime;
Info->ChangeTime.QuadPart = FileInfo->ChangeTime;
Info->FileAttributes = 0 != FileInfo->FileAttributes ?
FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryPositionInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd)
{
PAGED_CODE();
PFILE_POSITION_INFORMATION Info = (PFILE_POSITION_INFORMATION)*PBuffer;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
FspFileNodeAcquireShared(FileNode, Main);
Info->CurrentByteOffset = FileObject->CurrentByteOffset;
FspFileNodeRelease(FileNode, Main);
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryStandardInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
PFILE_STANDARD_INFORMATION Info = (PFILE_STANDARD_INFORMATION)*PBuffer;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
BOOLEAN DeletePending;
if (0 == FileInfo)
{
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
return STATUS_SUCCESS;
}
DeletePending = 0 != FileNode->DeletePending;
MemoryBarrier();
Info->AllocationSize.QuadPart = FileInfo->AllocationSize;
Info->EndOfFile.QuadPart = FileInfo->FileSize;
Info->NumberOfLinks = 1;
Info->DeletePending = DeletePending || FileObject->DeletePending;
Info->Directory = FileNode->IsDirectory;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryStatBaseInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
PFSP_FILE_STAT_INFORMATION Info = (PFSP_FILE_STAT_INFORMATION)*PBuffer;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
if (0 == FileInfo)
{
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
return STATUS_SUCCESS;
}
Info->FileId.QuadPart = FileNode->IndexNumber;
Info->CreationTime.QuadPart = FileInfo->CreationTime;
Info->LastAccessTime.QuadPart = FileInfo->LastAccessTime;
Info->LastWriteTime.QuadPart = FileInfo->LastWriteTime;
Info->ChangeTime.QuadPart = FileInfo->ChangeTime;
Info->AllocationSize.QuadPart = FileInfo->AllocationSize;
Info->EndOfFile.QuadPart = FileInfo->FileSize;
Info->FileAttributes = 0 != FileInfo->FileAttributes ?
FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
Info->ReparseTag = FileInfo->ReparseTag;
Info->NumberOfLinks = 1;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryStatLxBaseInformation(PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
PFSP_FILE_STAT_LX_INFORMATION Info = (PFSP_FILE_STAT_LX_INFORMATION)*PBuffer;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
if (0 == FileInfo)
{
if ((PVOID)(Info + 1) > BufferEnd)
return STATUS_BUFFER_TOO_SMALL;
return STATUS_SUCCESS;
}
Info->FileId.QuadPart = FileNode->IndexNumber;
Info->CreationTime.QuadPart = FileInfo->CreationTime;
Info->LastAccessTime.QuadPart = FileInfo->LastAccessTime;
Info->LastWriteTime.QuadPart = FileInfo->LastWriteTime;
Info->ChangeTime.QuadPart = FileInfo->ChangeTime;
Info->AllocationSize.QuadPart = FileInfo->AllocationSize;
Info->EndOfFile.QuadPart = FileInfo->FileSize;
Info->FileAttributes = 0 != FileInfo->FileAttributes ?
FileInfo->FileAttributes : FILE_ATTRIBUTE_NORMAL;
Info->ReparseTag = FileInfo->ReparseTag;
Info->NumberOfLinks = 1;
*PBuffer = (PVOID)(Info + 1);
return STATUS_SUCCESS;
}
static NTSTATUS FspFsvolQueryStatLxEaInformation(
PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
PVOID *PBuffer, PVOID BufferEnd)
{
#define ADD_GET_EA(Name, End) \
GetEa->NextEntryOffset = (ULONG)(End ? 0 :\
FSP_FSCTL_ALIGN_UP( \
FIELD_OFFSET(FILE_GET_EA_INFORMATION, EaName) + sizeof("" Name),\
sizeof(ULONG))); \
GetEa->EaNameLength = (UCHAR)(sizeof("" Name) - 1);\
RtlCopyMemory(GetEa->EaName, "" Name, sizeof("" Name));\
GetEaLength = (ULONG)((PUINT8)GetEa - (PUINT8)&GetEaBuf.V +\
FIELD_OFFSET(FILE_GET_EA_INFORMATION, EaName) + sizeof("" Name));\
GetEa = (PVOID)((PUINT8)GetEa + GetEa->NextEntryOffset);
#define EQUAL_EA_NAME(Name) \
CmpName.Length = \
CmpName.MaximumLength = sizeof("" Name) - 1,\
CmpName.Buffer = "" Name, \
RtlEqualString(&CmpName, &EaName, TRUE/* always case-insensitive */)
PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
PFSP_FILE_STAT_LX_INFORMATION Info = (PFSP_FILE_STAT_LX_INFORMATION)*PBuffer;
union
{
FILE_GET_EA_INFORMATION V;
UINT8 B[64];
} GetEaBuf;
PFILE_GET_EA_INFORMATION GetEa = &GetEaBuf.V;
ULONG GetEaLength = 0;
union
{
FILE_FULL_EA_INFORMATION V;
UINT8 B[128];
} EaBuf;
ULONG EaLength = sizeof EaBuf;
STRING EaName, CmpName;
NTSTATUS Result;
Info->LxFlags = 0;
Info->LxUid = 0;
Info->LxGid = 0;
Info->LxMode = 0;
Info->LxDeviceIdMajor = 0;
Info->LxDeviceIdMinor = 0;
if (!FsvolDeviceExtension->VolumeParams.ExtendedAttributes)
return STATUS_SUCCESS;
ADD_GET_EA("$LXUID", 0);
ADD_GET_EA("$LXGID", 0);
ADD_GET_EA("$LXMOD", 0);
ADD_GET_EA("$LXDEV", 1);
Result = FspSendQueryEaIrp(FsvolDeviceObject/* bypass filters */, FileObject,
&GetEaBuf.V, GetEaLength,
&EaBuf.V, &EaLength);
if (!NT_SUCCESS(Result))
return Result;
for (PFILE_FULL_EA_INFORMATION Ea = &EaBuf.V, EaEnd = (PVOID)((PUINT8)Ea + EaLength);
EaEnd > Ea; Ea = FSP_NEXT_EA(Ea, EaEnd))
{
EaName.Length =
EaName.MaximumLength = Ea->EaNameLength,
EaName.Buffer = Ea->EaName;
if (EQUAL_EA_NAME("$LXUID"))
{
if (sizeof(ULONG) == Ea->EaValueLength)
{
Info->LxFlags |= 0x1/*LX_FILE_METADATA_HAS_UID*/;
Info->LxUid = *(PULONG)(Ea->EaName + sizeof "$LXUID");
}
}
else
if (EQUAL_EA_NAME("$LXGID"))
{
if (sizeof(ULONG) == Ea->EaValueLength)
{
Info->LxFlags |= 0x2/*LX_FILE_METADATA_HAS_GID*/;
Info->LxGid = *(PULONG)(Ea->EaName + sizeof "$LXGID");
}
}
else
if (EQUAL_EA_NAME("$LXMOD"))
{
if (sizeof(ULONG) == Ea->EaValueLength)
{
Info->LxFlags |= 0x4/*LX_FILE_METADATA_HAS_MODE*/;
Info->LxMode = *(PULONG)(Ea->EaName + sizeof "$LXMOD");
}
}
else
if (EQUAL_EA_NAME("$LXDEV"))
{
if (sizeof(UINT64) == Ea->EaValueLength)
{
Info->LxFlags |= 0x8/*LX_FILE_METADATA_HAS_DEVICE_ID*/;
UINT64 Dev = *(PUINT64)(Ea->EaName + sizeof "$LXDEV");
Info->LxDeviceIdMajor = (Dev >> 32) & 0xffffffff;
Info->LxDeviceIdMinor = Dev & 0xffffffff;
}
}
}
return STATUS_SUCCESS;
#undef EQUAL_EA_NAME
#undef ADD_GET_EA
}
static NTSTATUS FspFsvolQueryStreamInformationCopy(
FSP_FSCTL_STREAM_INFO *StreamInfo, ULONG StreamInfoSize,
PVOID DestBuf, PULONG PDestLen)
{
#define STREAM_TYPE ":$DATA"
#define STREAM_TYPE_LENGTH (sizeof L"" STREAM_TYPE - sizeof(WCHAR))
#define STREAM_EXTRA_LENGTH (sizeof L":" STREAM_TYPE - sizeof(WCHAR))
#define FILL_INFO()\
do\
{\
FILE_STREAM_INFORMATION InfoStruct = { 0 }, *Info = &InfoStruct;\
Info->NextEntryOffset = 0;\
Info->StreamNameLength = StreamNameLength;\
Info->StreamSize.QuadPart = StreamInfo->StreamSize;\
Info->StreamAllocationSize.QuadPart = StreamInfo->StreamAllocationSize;\
Info = DestBuf;\
RtlCopyMemory(Info, &InfoStruct, FIELD_OFFSET(FILE_STREAM_INFORMATION, StreamName));\
{\
PWSTR StreamName = Info->StreamName;\
ULONG Length[3];\
Length[0] = 0 < CopyLength ? sizeof(WCHAR) : 0;\
Length[1] = Info->StreamNameLength - STREAM_EXTRA_LENGTH < CopyLength - Length[0] ?\
Info->StreamNameLength - STREAM_EXTRA_LENGTH : CopyLength - Length[0];\
Length[2] = CopyLength - Length[0] - Length[1];\
ASSERT(\
sizeof(WCHAR) >= Length[0] &&\
Info->StreamNameLength - STREAM_EXTRA_LENGTH >= Length[1] &&\
STREAM_TYPE_LENGTH >= Length[2]);\
RtlCopyMemory(StreamName, L":", Length[0]);\
StreamName += Length[0] / sizeof(WCHAR);\
RtlCopyMemory(StreamName, StreamInfo->StreamNameBuf, Length[1]);\
StreamName += Length[1] / sizeof(WCHAR);\
RtlCopyMemory(StreamName, L"" STREAM_TYPE, Length[2]);\
}\
} while (0,0)
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
PUINT8 StreamInfoEnd = (PUINT8)StreamInfo + StreamInfoSize;
PUINT8 DestBufBgn = (PUINT8)DestBuf;
PUINT8 DestBufEnd = (PUINT8)DestBuf + *PDestLen;
PVOID PrevDestBuf = 0;
ULONG StreamNameLength, CopyLength;
ULONG BaseInfoLen = FIELD_OFFSET(FILE_STREAM_INFORMATION, StreamName);
*PDestLen = 0;
for (;
NT_SUCCESS(Result) && (PUINT8)StreamInfo + sizeof(StreamInfo->Size) <= StreamInfoEnd;
StreamInfo = (PVOID)((PUINT8)StreamInfo + FSP_FSCTL_DEFAULT_ALIGN_UP(StreamInfoSize)))
{
StreamInfoSize = StreamInfo->Size;
if (sizeof(FSP_FSCTL_STREAM_INFO) > StreamInfoSize)
break;
StreamNameLength = StreamInfoSize - sizeof(FSP_FSCTL_STREAM_INFO) + STREAM_EXTRA_LENGTH;
/* CopyLength is the same as StreamNameLength except on STATUS_BUFFER_OVERFLOW */
CopyLength = StreamNameLength;
/* do we have enough space for this stream info? */
if ((PUINT8)DestBuf + BaseInfoLen + CopyLength > DestBufEnd)
{
/* can we even copy the base info? */
if ((PUINT8)DestBuf + BaseInfoLen > DestBufEnd)
{
if (0 == *PDestLen)
/* if we haven't copied anything yet, buffer is too small */
return STATUS_BUFFER_TOO_SMALL;
else
/* *PDestLen contains bytes copied so far */
return STATUS_BUFFER_OVERFLOW;
}
/* copy as much of the stream name as we can and return STATUS_BUFFER_OVERFLOW */
CopyLength = (ULONG)(DestBufEnd - ((PUINT8)DestBuf + BaseInfoLen));
Result = STATUS_BUFFER_OVERFLOW;
}
/* fill in NextEntryOffset */
if (0 != PrevDestBuf)
*(PULONG)PrevDestBuf = (ULONG)((PUINT8)DestBuf - (PUINT8)PrevDestBuf);
PrevDestBuf = DestBuf;
/* update bytes copied */
*PDestLen = (ULONG)((PUINT8)DestBuf + BaseInfoLen + CopyLength - DestBufBgn);
FILL_INFO();
/* advance DestBuf; make sure to align properly! */
DestBuf = (PVOID)((PUINT8)DestBuf +
FSP_FSCTL_ALIGN_UP(BaseInfoLen + CopyLength, sizeof(LONGLONG)));
}
/* our code flow should allow only these two status codes here */
ASSERT(STATUS_SUCCESS == Result || STATUS_BUFFER_OVERFLOW == Result);
return Result;
#undef FILL_INFO
#undef STREAM_EXTRA_LENGTH
#undef STREAM_TYPE_LENGTH
#undef STREAM_TYPE
}
static NTSTATUS FspFsvolQueryStreamInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
if (!FspFsvolDeviceExtension(FsvolDeviceObject)->VolumeParams.NamedStreams)
return STATUS_INVALID_PARAMETER;
NTSTATUS Result;
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
FSP_FILE_DESC *FileDesc = FileObject->FsContext2;
PVOID Buffer = Irp->AssociatedIrp.SystemBuffer;
ULONG Length = IrpSp->Parameters.QueryFile.Length;
PVOID StreamInfoBuffer;
ULONG StreamInfoBufferSize;
FSP_FSCTL_TRANSACT_REQ *Request;
ASSERT(FileNode == FileDesc->FileNode);
FspFileNodeAcquireShared(FileNode, Main);
if (FspFileNodeReferenceStreamInfo(FileNode, &StreamInfoBuffer, &StreamInfoBufferSize))
{
FspFileNodeRelease(FileNode, Main);
Result = FspFsvolQueryStreamInformationCopy(
StreamInfoBuffer, StreamInfoBufferSize, Buffer, &Length);
FspFileNodeDereferenceStreamInfo(StreamInfoBuffer);
Irp->IoStatus.Information = Length;
return Result;
}
FspFileNodeAcquireShared(FileNode, Pgio);
Result = FspIopCreateRequestEx(Irp, 0, 0, FspFsvolQueryInformationRequestFini, &Request);
if (!NT_SUCCESS(Result))
{
FspFileNodeRelease(FileNode, Full);
return Result;
}
Request->Kind = FspFsctlTransactQueryStreamInformationKind;
Request->Req.QueryStreamInformation.UserContext = FileNode->UserContext;
Request->Req.QueryStreamInformation.UserContext2 = FileDesc->UserContext2;
FspFileNodeSetOwner(FileNode, Full, Request);
FspIopRequestContext(Request, RequestFileNode) = FileNode;
return FSP_STATUS_IOQ_POST;
}
static NTSTATUS FspFsvolQueryStreamInformationSuccess(
PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
{
PAGED_CODE();
if (!FspFsvolDeviceExtension(IoGetCurrentIrpStackLocation(Irp)->DeviceObject)->
VolumeParams.NamedStreams)
return STATUS_INVALID_PARAMETER;
NTSTATUS Result;
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
PVOID Buffer = Irp->AssociatedIrp.SystemBuffer;
ULONG Length = IrpSp->Parameters.QueryFile.Length;
PVOID StreamInfoBuffer = 0;
ULONG StreamInfoBufferSize = 0;
FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
BOOLEAN Success;
if (0 != FspIopRequestContext(Request, RequestFileNode))
{
/* check that the stream info we got back is valid */
if (Response->Buffer + Response->Rsp.QueryStreamInformation.Buffer.Size >
(PUINT8)Response + Response->Size)
{
Irp->IoStatus.Information = 0;
return STATUS_INTERNAL_ERROR;
}
FspIopRequestContext(Request, RequestInfoChangeNumber) = (PVOID)
FspFileNodeStreamInfoChangeNumber(FileNode);
FspIopRequestContext(Request, RequestFileNode) = 0;
FspFileNodeReleaseOwner(FileNode, Full, Request);
}
Success = DEBUGTEST(90) && FspFileNodeTryAcquireExclusive(FileNode, Main);
if (!Success)
{
FspIopRetryCompleteIrp(Irp, Response, &Result);
return Result;
}
Success = !FspFileNodeTrySetStreamInfo(FileNode,
Response->Buffer, Response->Rsp.QueryStreamInformation.Buffer.Size,
(ULONG)(UINT_PTR)FspIopRequestContext(Request, RequestInfoChangeNumber));
Success = Success &&
FspFileNodeReferenceStreamInfo(FileNode, &StreamInfoBuffer, &StreamInfoBufferSize);
FspFileNodeRelease(FileNode, Main);
if (Success)
{
Result = FspFsvolQueryStreamInformationCopy(
StreamInfoBuffer, StreamInfoBufferSize, Buffer, &Length);
FspFileNodeDereferenceStreamInfo(StreamInfoBuffer);
}
else
{
StreamInfoBuffer = (PVOID)Response->Buffer;
StreamInfoBufferSize = Response->Rsp.QueryStreamInformation.Buffer.Size;
Result = FspFsvolQueryStreamInformationCopy(
StreamInfoBuffer, StreamInfoBufferSize, Buffer, &Length);
}
Irp->IoStatus.Information = Length;
return Result;
}
static NTSTATUS FspFsvolQueryInformationEffectiveAccess(
PDEVICE_OBJECT FsvolDeviceObject, PFILE_OBJECT FileObject,
PACCESS_MASK PEffectiveAccess)
{
PAGED_CODE();
union
{
SECURITY_DESCRIPTOR V;
UINT8 B[256];
} SecurityDescriptorBuf;
PSECURITY_DESCRIPTOR SecurityDescriptor = &SecurityDescriptorBuf.V;
ULONG Length;
SECURITY_SUBJECT_CONTEXT SecuritySubjectContext;
ACCESS_MASK EffectiveAccess;
NTSTATUS Result;
BOOLEAN AccessResult;
*PEffectiveAccess = 0;
Length = sizeof SecurityDescriptorBuf;
Result = FspSendQuerySecurityIrp(FsvolDeviceObject/* bypass filters */, FileObject,
OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
SecurityDescriptor, &Length);
if (STATUS_BUFFER_OVERFLOW == Result)
{
SecurityDescriptor = FspAlloc(Length);
if (0 == SecurityDescriptor)
{
Result = STATUS_INSUFFICIENT_RESOURCES;
goto exit;
}
Result = FspSendQuerySecurityIrp(FsvolDeviceObject/* bypass filters */, FileObject,
OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
SecurityDescriptor, &Length);
}
if (!NT_SUCCESS(Result))
goto exit;
SeCaptureSubjectContext(&SecuritySubjectContext);
AccessResult = SeAccessCheck(
SecurityDescriptor,
&SecuritySubjectContext,
FALSE,
MAXIMUM_ALLOWED,
0,
0,
IoGetFileObjectGenericMapping(),
UserMode,
&EffectiveAccess,
&Result);
if (!AccessResult)
goto exit;
*PEffectiveAccess = EffectiveAccess;
exit:
if (&SecurityDescriptorBuf.V != SecurityDescriptor && 0 != SecurityDescriptor)
FspFree(SecurityDescriptor);
return Result;
}
static NTSTATUS FspFsvolQueryInformation(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
/* is this a valid FileObject? */
if (!FspFileNodeIsValid(IrpSp->FileObject->FsContext))
return STATUS_INVALID_PARAMETER;
FILE_INFORMATION_CLASS FileInformationClass = IrpSp->Parameters.QueryFile.FileInformationClass;
/* special case FileStreamInformation */
if (FileStreamInformation == FileInformationClass)
return FspFsvolQueryStreamInformation(FsvolDeviceObject, Irp, IrpSp);
NTSTATUS Result;
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
FSP_FILE_DESC *FileDesc = FileObject->FsContext2;
PVOID Buffer = Irp->AssociatedIrp.SystemBuffer;
PVOID BufferEnd = (PUINT8)Buffer + IrpSp->Parameters.QueryFile.Length;
FSP_FSCTL_FILE_INFO FileInfoBuf;
NTSTATUS AllInformationResult = STATUS_INVALID_PARAMETER;
PVOID AllInformationBuffer = 0;
ASSERT(FileNode == FileDesc->FileNode);
switch (FileInformationClass)
{
case FileAllInformation:
Result = FspFsvolQueryAllInformation(FileObject, &Buffer, BufferEnd, 0);
AllInformationResult = Result;
AllInformationBuffer = Buffer;
if (STATUS_BUFFER_OVERFLOW == Result)
Result = STATUS_SUCCESS;
Buffer = Irp->AssociatedIrp.SystemBuffer;
break;
case FileAttributeTagInformation:
Result = FspFsvolQueryAttributeTagInformation(FileObject, &Buffer, BufferEnd, 0);
break;
case FileBasicInformation:
Result = FspFsvolQueryBasicInformation(FileObject, &Buffer, BufferEnd, 0);
break;
case FileCompressionInformation:
Result = STATUS_INVALID_PARAMETER; /* no compression support */
return Result;
case FileEaInformation:
Result = FspFsvolQueryEaInformation(FileObject, &Buffer, BufferEnd, 0);
break;
case FileHardLinkInformation:
Result = STATUS_NOT_SUPPORTED; /* no hard link support */
return Result;
case FileInternalInformation:
Result = FspFsvolQueryInternalInformation(FileObject, &Buffer, BufferEnd);
Irp->IoStatus.Information = (UINT_PTR)((PUINT8)Buffer - (PUINT8)Irp->AssociatedIrp.SystemBuffer);
return Result;
case FileNameInformation:
case FileNormalizedNameInformation:
Result = FspFsvolQueryNameInformation(FileObject, &Buffer, BufferEnd);
Irp->IoStatus.Information = (UINT_PTR)((PUINT8)Buffer - (PUINT8)Irp->AssociatedIrp.SystemBuffer);
return Result;
case FileAlternateNameInformation:
Result = STATUS_OBJECT_NAME_NOT_FOUND; /* WinFsp does not support short names */
return Result;
case FileNetworkOpenInformation:
Result = FspFsvolQueryNetworkOpenInformation(FileObject, &Buffer, BufferEnd, 0);
break;
case FilePositionInformation:
Result = FspFsvolQueryPositionInformation(FileObject, &Buffer, BufferEnd);
Irp->IoStatus.Information = (UINT_PTR)((PUINT8)Buffer - (PUINT8)Irp->AssociatedIrp.SystemBuffer);
return Result;
case FileStandardInformation:
Result = FspFsvolQueryStandardInformation(FileObject, &Buffer, BufferEnd, 0);
break;
case 68/*FileStatInformation*/:
if (FspFsvolDeviceExtension(FsvolDeviceObject)->VolumeParams.WslFeatures)
Result = FspFsvolQueryStatBaseInformation(FileObject, &Buffer, BufferEnd, 0);
else
Result = STATUS_INVALID_PARAMETER;
break;
case 70/*FileStatLxInformation*/:
if (FspFsvolDeviceExtension(FsvolDeviceObject)->VolumeParams.WslFeatures)
Result = FspFsvolQueryStatLxBaseInformation(FileObject, &Buffer, BufferEnd, 0);
else
Result = STATUS_INVALID_PARAMETER;
break;
default:
Result = STATUS_INVALID_PARAMETER;
return Result;
}