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* COPYRIGHT: See COPYRIGHT.TXT * PROJECT: Ext2 File System Driver for WinNT/2K/XP * FILE: fileinfo.c * PROGRAMMER: Matt Wu <mattwu@163.com> * HOMEPAGE: http://www.ext2fsd.com * UPDATE HISTORY: */
/* INCLUDES *****************************************************************/
#include "ext2fs.h"#ifdef __REACTOS__#include "linux/ext4.h"#include "linux/ext4_xattr.h"#else#include "linux\ext4.h"#include "linux\ext4_xattr.h"#endif
/* GLOBALS ***************************************************************/
extern PEXT2_GLOBAL Ext2Global;
/* DEFINITIONS *************************************************************/
#ifdef ALLOC_PRAGMA#pragma alloc_text(PAGE, Ext2QueryFileInformation)#pragma alloc_text(PAGE, Ext2SetFileInformation)#pragma alloc_text(PAGE, Ext2ExpandFile)#pragma alloc_text(PAGE, Ext2TruncateFile)#pragma alloc_text(PAGE, Ext2SetDispositionInfo)#pragma alloc_text(PAGE, Ext2SetRenameInfo)#pragma alloc_text(PAGE, Ext2SetLinkInfo)#pragma alloc_text(PAGE, Ext2DeleteFile)#endif
static int Ext2IterateAllEa(struct ext4_xattr_ref *xattr_ref, struct ext4_xattr_item *item, BOOL is_last){ PULONG EaSize = xattr_ref->iter_arg; ULONG EaEntrySize = 4 + 1 + 1 + 2 + item->name_len + 1 + item->data_size;
*EaSize += EaEntrySize - 4; return EXT4_XATTR_ITERATE_CONT;}
NTSTATUSExt2QueryFileInformation (IN PEXT2_IRP_CONTEXT IrpContext){ PDEVICE_OBJECT DeviceObject; NTSTATUS Status = STATUS_UNSUCCESSFUL; PFILE_OBJECT FileObject; PEXT2_VCB Vcb = NULL; PEXT2_FCB Fcb = NULL; PEXT2_MCB Mcb = NULL; PEXT2_CCB Ccb = NULL; PIRP Irp = NULL; PIO_STACK_LOCATION IoStackLocation; FILE_INFORMATION_CLASS FileInformationClass; ULONG Length; PVOID Buffer; BOOLEAN FcbResourceAcquired = FALSE;
_SEH2_TRY {
ASSERT(IrpContext != NULL); ASSERT((IrpContext->Identifier.Type == EXT2ICX) && (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
DeviceObject = IrpContext->DeviceObject;
// // This request is not allowed on the main device object // if (IsExt2FsDevice(DeviceObject)) { Status = STATUS_INVALID_DEVICE_REQUEST; _SEH2_LEAVE; }
FileObject = IrpContext->FileObject; Fcb = (PEXT2_FCB) FileObject->FsContext; if (Fcb == NULL) { Status = STATUS_INVALID_PARAMETER; _SEH2_LEAVE; }
// // This request is not allowed on volumes // if (Fcb->Identifier.Type == EXT2VCB) { Status = STATUS_INVALID_PARAMETER; _SEH2_LEAVE; }
if (!((Fcb->Identifier.Type == EXT2FCB) && (Fcb->Identifier.Size == sizeof(EXT2_FCB)))) { Status = STATUS_INVALID_PARAMETER; _SEH2_LEAVE; }
Vcb = Fcb->Vcb;
{ if (!ExAcquireResourceSharedLite( &Fcb->MainResource, IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) )) {
Status = STATUS_PENDING; _SEH2_LEAVE; }
FcbResourceAcquired = TRUE; }
Ccb = (PEXT2_CCB) FileObject->FsContext2; ASSERT(Ccb != NULL); ASSERT((Ccb->Identifier.Type == EXT2CCB) && (Ccb->Identifier.Size == sizeof(EXT2_CCB))); Mcb = Ccb->SymLink; if (!Mcb) Mcb = Fcb->Mcb;
Irp = IrpContext->Irp; IoStackLocation = IoGetCurrentIrpStackLocation(Irp); FileInformationClass = IoStackLocation->Parameters.QueryFile.FileInformationClass;
Length = IoStackLocation->Parameters.QueryFile.Length; Buffer = Irp->AssociatedIrp.SystemBuffer; RtlZeroMemory(Buffer, Length);
switch (FileInformationClass) {
case FileBasicInformation: { PFILE_BASIC_INFORMATION FileBasicInformation;
if (Length < sizeof(FILE_BASIC_INFORMATION)) { Status = STATUS_BUFFER_OVERFLOW; _SEH2_LEAVE; }
FileBasicInformation = (PFILE_BASIC_INFORMATION) Buffer;
FileBasicInformation->CreationTime = Mcb->CreationTime; FileBasicInformation->LastAccessTime = Mcb->LastAccessTime; FileBasicInformation->LastWriteTime = Mcb->LastWriteTime; FileBasicInformation->ChangeTime = Mcb->ChangeTime;
FileBasicInformation->FileAttributes = Mcb->FileAttr; if (IsLinkInvalid(Mcb)) { ClearFlag(FileBasicInformation->FileAttributes, FILE_ATTRIBUTE_DIRECTORY); } if (FileBasicInformation->FileAttributes == 0) { FileBasicInformation->FileAttributes = FILE_ATTRIBUTE_NORMAL; }
Irp->IoStatus.Information = sizeof(FILE_BASIC_INFORMATION); Status = STATUS_SUCCESS; } break;
case FileStandardInformation: { PFILE_STANDARD_INFORMATION FSI;
if (Length < sizeof(FILE_STANDARD_INFORMATION)) { Status = STATUS_BUFFER_OVERFLOW; _SEH2_LEAVE; }
FSI = (PFILE_STANDARD_INFORMATION) Buffer;
FSI->NumberOfLinks = Mcb->Inode.i_nlink;
if (IsVcbReadOnly(Fcb->Vcb)) FSI->DeletePending = FALSE; else FSI->DeletePending = IsFlagOn(Fcb->Flags, FCB_DELETE_PENDING);
if (IsLinkInvalid(Mcb)) { FSI->Directory = FALSE; FSI->AllocationSize.QuadPart = 0; FSI->EndOfFile.QuadPart = 0; } else if (IsMcbDirectory(Mcb)) { FSI->Directory = TRUE; FSI->AllocationSize.QuadPart = 0; FSI->EndOfFile.QuadPart = 0; } else { FSI->Directory = FALSE; FSI->AllocationSize = Fcb->Header.AllocationSize; FSI->EndOfFile = Fcb->Header.FileSize; }
Irp->IoStatus.Information = sizeof(FILE_STANDARD_INFORMATION); Status = STATUS_SUCCESS; } break;
case FileInternalInformation: { PFILE_INTERNAL_INFORMATION FileInternalInformation;
if (Length < sizeof(FILE_INTERNAL_INFORMATION)) { Status = STATUS_BUFFER_OVERFLOW; _SEH2_LEAVE; }
FileInternalInformation = (PFILE_INTERNAL_INFORMATION) Buffer;
/* we use the inode number as the internal index */ FileInternalInformation->IndexNumber.QuadPart = (LONGLONG)Mcb->Inode.i_ino;
Irp->IoStatus.Information = sizeof(FILE_INTERNAL_INFORMATION); Status = STATUS_SUCCESS; } break;
case FileEaInformation: { struct ext4_xattr_ref xattr_ref; PFILE_EA_INFORMATION FileEaInformation;
if (Length < sizeof(FILE_EA_INFORMATION)) { Status = STATUS_BUFFER_OVERFLOW; _SEH2_LEAVE; }
FileEaInformation = (PFILE_EA_INFORMATION) Buffer; FileEaInformation->EaSize = 0;
Status = Ext2WinntError(ext4_fs_get_xattr_ref(IrpContext, Vcb, Fcb->Mcb, &xattr_ref)); if (!NT_SUCCESS(Status)) _SEH2_LEAVE;
xattr_ref.iter_arg = &FileEaInformation->EaSize; ext4_fs_xattr_iterate(&xattr_ref, Ext2IterateAllEa); ext4_fs_put_xattr_ref(&xattr_ref);
if (FileEaInformation->EaSize) FileEaInformation->EaSize += 4;
Irp->IoStatus.Information = sizeof(FILE_EA_INFORMATION); Status = STATUS_SUCCESS; } break;
case FileNameInformation: { PFILE_NAME_INFORMATION FileNameInformation; ULONG BytesToCopy = 0;
if (Length < (ULONG)FIELD_OFFSET(FILE_NAME_INFORMATION, FileName) + Mcb->FullName.Length) { BytesToCopy = Length - FIELD_OFFSET(FILE_NAME_INFORMATION, FileName); Status = STATUS_BUFFER_OVERFLOW; } else { BytesToCopy = Mcb->FullName.Length; Status = STATUS_SUCCESS; }
FileNameInformation = (PFILE_NAME_INFORMATION) Buffer; FileNameInformation->FileNameLength = Mcb->FullName.Length;
RtlCopyMemory( FileNameInformation->FileName, Mcb->FullName.Buffer, BytesToCopy );
Irp->IoStatus.Information = BytesToCopy + + FIELD_OFFSET(FILE_NAME_INFORMATION, FileName); } break;
case FilePositionInformation: { PFILE_POSITION_INFORMATION FilePositionInformation;
if (Length < sizeof(FILE_POSITION_INFORMATION)) { Status = STATUS_BUFFER_OVERFLOW; _SEH2_LEAVE; }
FilePositionInformation = (PFILE_POSITION_INFORMATION) Buffer; FilePositionInformation->CurrentByteOffset = FileObject->CurrentByteOffset;
Irp->IoStatus.Information = sizeof(FILE_POSITION_INFORMATION); Status = STATUS_SUCCESS; } break;
case FileAllInformation: { PFILE_ALL_INFORMATION FileAllInformation; PFILE_BASIC_INFORMATION FileBasicInformation; PFILE_STANDARD_INFORMATION FSI; PFILE_INTERNAL_INFORMATION FileInternalInformation; PFILE_EA_INFORMATION FileEaInformation; PFILE_POSITION_INFORMATION FilePositionInformation; PFILE_NAME_INFORMATION FileNameInformation;
if (Length < sizeof(FILE_ALL_INFORMATION)) { Status = STATUS_BUFFER_OVERFLOW; _SEH2_LEAVE; }
FileAllInformation = (PFILE_ALL_INFORMATION) Buffer;
FileBasicInformation = &FileAllInformation->BasicInformation;
FSI = &FileAllInformation->StandardInformation;
FileInternalInformation = &FileAllInformation->InternalInformation;
FileEaInformation = &FileAllInformation->EaInformation;
FilePositionInformation = &FileAllInformation->PositionInformation;
FileNameInformation = &FileAllInformation->NameInformation;
FileBasicInformation->CreationTime = Mcb->CreationTime; FileBasicInformation->LastAccessTime = Mcb->LastAccessTime; FileBasicInformation->LastWriteTime = Mcb->LastWriteTime; FileBasicInformation->ChangeTime = Mcb->ChangeTime;
FileBasicInformation->FileAttributes = Mcb->FileAttr; if (IsMcbSymLink(Mcb) && IsFileDeleted(Mcb->Target)) { ClearFlag(FileBasicInformation->FileAttributes, FILE_ATTRIBUTE_DIRECTORY); } if (FileBasicInformation->FileAttributes == 0) { FileBasicInformation->FileAttributes = FILE_ATTRIBUTE_NORMAL; }
FSI->NumberOfLinks = Mcb->Inode.i_nlink;
if (IsVcbReadOnly(Fcb->Vcb)) FSI->DeletePending = FALSE; else FSI->DeletePending = IsFlagOn(Fcb->Flags, FCB_DELETE_PENDING);
if (IsLinkInvalid(Mcb)) { FSI->Directory = FALSE; FSI->AllocationSize.QuadPart = 0; FSI->EndOfFile.QuadPart = 0; } else if (IsDirectory(Fcb)) { FSI->Directory = TRUE; FSI->AllocationSize.QuadPart = 0; FSI->EndOfFile.QuadPart = 0; } else { FSI->Directory = FALSE; FSI->AllocationSize = Fcb->Header.AllocationSize; FSI->EndOfFile = Fcb->Header.FileSize; }
// The "inode number" FileInternalInformation->IndexNumber.QuadPart = (LONGLONG)Mcb->Inode.i_ino;
// Romfs doesn't have any extended attributes FileEaInformation->EaSize = 0;
FilePositionInformation->CurrentByteOffset = FileObject->CurrentByteOffset;
FileNameInformation->FileNameLength = Mcb->ShortName.Length;
if (Length < sizeof(FILE_ALL_INFORMATION) + Mcb->ShortName.Length - sizeof(WCHAR)) { Irp->IoStatus.Information = sizeof(FILE_ALL_INFORMATION); Status = STATUS_BUFFER_OVERFLOW; RtlCopyMemory( FileNameInformation->FileName, Mcb->ShortName.Buffer, Length - FIELD_OFFSET(FILE_ALL_INFORMATION, NameInformation.FileName) ); _SEH2_LEAVE; }
RtlCopyMemory( FileNameInformation->FileName, Mcb->ShortName.Buffer, Mcb->ShortName.Length );
Irp->IoStatus.Information = sizeof(FILE_ALL_INFORMATION) + Mcb->ShortName.Length - sizeof(WCHAR);#if 0 sizeof(FILE_ACCESS_INFORMATION) - sizeof(FILE_MODE_INFORMATION) - sizeof(FILE_ALIGNMENT_INFORMATION);#endif
Status = STATUS_SUCCESS; } break;
/* case FileAlternateNameInformation: { // TODO: Handle FileAlternateNameInformation
// Here we would like to use RtlGenerate8dot3Name but I don't // know how to use the argument PGENERATE_NAME_CONTEXT } */
case FileNetworkOpenInformation: { PFILE_NETWORK_OPEN_INFORMATION PFNOI;
if (Length < sizeof(FILE_NETWORK_OPEN_INFORMATION)) { Status = STATUS_BUFFER_OVERFLOW; _SEH2_LEAVE; }
PFNOI = (PFILE_NETWORK_OPEN_INFORMATION) Buffer;
PFNOI->FileAttributes = Mcb->FileAttr; if (IsLinkInvalid(Mcb)) { ClearFlag(PFNOI->FileAttributes, FILE_ATTRIBUTE_DIRECTORY); PFNOI->AllocationSize.QuadPart = 0; PFNOI->EndOfFile.QuadPart = 0; } else if (IsDirectory(Fcb)) { PFNOI->AllocationSize.QuadPart = 0; PFNOI->EndOfFile.QuadPart = 0; } else { PFNOI->AllocationSize = Fcb->Header.AllocationSize; PFNOI->EndOfFile = Fcb->Header.FileSize; }
if (PFNOI->FileAttributes == 0) { PFNOI->FileAttributes = FILE_ATTRIBUTE_NORMAL; }
PFNOI->CreationTime = Mcb->CreationTime; PFNOI->LastAccessTime = Mcb->LastAccessTime; PFNOI->LastWriteTime = Mcb->LastWriteTime; PFNOI->ChangeTime = Mcb->ChangeTime;
Irp->IoStatus.Information = sizeof(FILE_NETWORK_OPEN_INFORMATION); Status = STATUS_SUCCESS; } break;
#if (_WIN32_WINNT >= 0x0500)
case FileAttributeTagInformation: { PFILE_ATTRIBUTE_TAG_INFORMATION FATI;
if (Length < sizeof(FILE_ATTRIBUTE_TAG_INFORMATION)) { Status = STATUS_BUFFER_OVERFLOW; _SEH2_LEAVE; }
FATI = (PFILE_ATTRIBUTE_TAG_INFORMATION) Buffer; FATI->FileAttributes = Mcb->FileAttr; if (IsLinkInvalid(Mcb)) { ClearFlag(FATI->FileAttributes, FILE_ATTRIBUTE_DIRECTORY); } if (FATI->FileAttributes == 0) { FATI->FileAttributes = FILE_ATTRIBUTE_NORMAL; } FATI->ReparseTag = IO_REPARSE_TAG_RESERVED_ZERO; Irp->IoStatus.Information = sizeof(FILE_ATTRIBUTE_TAG_INFORMATION); Status = STATUS_SUCCESS; } break;#endif // (_WIN32_WINNT >= 0x0500)
case FileStreamInformation: Status = STATUS_INVALID_PARAMETER; break;
default: DEBUG(DL_WRN, ( "Ext2QueryInformation: invalid class: %d\n", FileInformationClass)); Status = STATUS_INVALID_PARAMETER; /* STATUS_INVALID_INFO_CLASS; */ break; }
} _SEH2_FINALLY {
if (FcbResourceAcquired) { ExReleaseResourceLite(&Fcb->MainResource); }
if (!IrpContext->ExceptionInProgress) { if (Status == STATUS_PENDING || Status == STATUS_CANT_WAIT) { Status = Ext2QueueRequest(IrpContext); } else { Ext2CompleteIrpContext(IrpContext, Status); } } } _SEH2_END;
return Status;}
NTSTATUSExt2SetFileInformation (IN PEXT2_IRP_CONTEXT IrpContext){ PDEVICE_OBJECT DeviceObject; NTSTATUS Status = STATUS_UNSUCCESSFUL; PEXT2_VCB Vcb = NULL; PFILE_OBJECT FileObject = NULL; PEXT2_FCB Fcb = NULL; PEXT2_CCB Ccb = NULL; PEXT2_MCB Mcb = NULL; PIRP Irp = NULL; PIO_STACK_LOCATION IoStackLocation = NULL; FILE_INFORMATION_CLASS FileInformationClass;
ULONG NotifyFilter = 0;
ULONG Length; PVOID Buffer;
BOOLEAN FcbMainResourceAcquired = FALSE; BOOLEAN FcbPagingIoResourceAcquired = FALSE;
_SEH2_TRY {
ASSERT(IrpContext != NULL);
ASSERT((IrpContext->Identifier.Type == EXT2ICX) && (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT))); DeviceObject = IrpContext->DeviceObject;
// // This request is not allowed on the main device object // if (IsExt2FsDevice(DeviceObject)) { Status = STATUS_INVALID_DEVICE_REQUEST; _SEH2_LEAVE; }
/* check io stack location of irp stack */ Irp = IrpContext->Irp; IoStackLocation = IoGetCurrentIrpStackLocation(Irp); FileInformationClass = IoStackLocation->Parameters.SetFile.FileInformationClass; Length = IoStackLocation->Parameters.SetFile.Length; Buffer = Irp->AssociatedIrp.SystemBuffer;
/* check Vcb */ Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension; ASSERT(Vcb != NULL); ASSERT((Vcb->Identifier.Type == EXT2VCB) && (Vcb->Identifier.Size == sizeof(EXT2_VCB))); if (!IsMounted(Vcb)) { Status = STATUS_INVALID_DEVICE_REQUEST; _SEH2_LEAVE; }
if (FlagOn(Vcb->Flags, VCB_VOLUME_LOCKED)) { Status = STATUS_ACCESS_DENIED; _SEH2_LEAVE; }
FileObject = IrpContext->FileObject; Fcb = (PEXT2_FCB) FileObject->FsContext;
// This request is issued to volumes, just return success if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) { Status = STATUS_SUCCESS; _SEH2_LEAVE; } ASSERT((Fcb->Identifier.Type == EXT2FCB) && (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
if (IsFlagOn(Fcb->Mcb->Flags, MCB_FILE_DELETED)) { Status = STATUS_FILE_DELETED; _SEH2_LEAVE; }
Ccb = (PEXT2_CCB) FileObject->FsContext2; ASSERT(Ccb != NULL); ASSERT((Ccb->Identifier.Type == EXT2CCB) && (Ccb->Identifier.Size == sizeof(EXT2_CCB))); Mcb = Ccb->SymLink; if (Mcb) { if (IsFlagOn(Mcb->Flags, MCB_FILE_DELETED)) { Status = STATUS_FILE_DELETED; _SEH2_LEAVE; } } else { Mcb = Fcb->Mcb; }
if (FileInformationClass != FilePositionInformation) { if (IsVcbReadOnly(Vcb)) { Status = STATUS_MEDIA_WRITE_PROTECTED; _SEH2_LEAVE; } if (!Ext2CheckFileAccess(Vcb, Mcb, Ext2FileCanWrite)) { Status = STATUS_ACCESS_DENIED; _SEH2_LEAVE; } }
if ( !IsDirectory(Fcb) && !FlagOn(Fcb->Flags, FCB_PAGE_FILE) && ((FileInformationClass == FileEndOfFileInformation) || (FileInformationClass == FileValidDataLengthInformation) || (FileInformationClass == FileAllocationInformation))) {
Status = FsRtlCheckOplock( &Fcb->Oplock, Irp, IrpContext, NULL, NULL );
if (Status != STATUS_SUCCESS) { _SEH2_LEAVE; }
// // Set the flag indicating if Fast I/O is possible //
Fcb->Header.IsFastIoPossible = Ext2IsFastIoPossible(Fcb); }
/* for renaming or set link, we must not grab any Fcb locks, and later we will get Dcb or Fcb resources exclusively. */ if (!IsFlagOn(Fcb->Flags, FCB_PAGE_FILE) && FileInformationClass != FileRenameInformation && FileInformationClass != FileLinkInformation) {
if (!ExAcquireResourceExclusiveLite( &Fcb->MainResource, IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) )) { Status = STATUS_PENDING; _SEH2_LEAVE; }
FcbMainResourceAcquired = TRUE;
if ( FileInformationClass == FileAllocationInformation || FileInformationClass == FileEndOfFileInformation || FileInformationClass == FileValidDataLengthInformation) {
if (!ExAcquireResourceExclusiveLite( &Fcb->PagingIoResource, IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) )) { Status = STATUS_PENDING; DbgBreak(); _SEH2_LEAVE; } FcbPagingIoResourceAcquired = TRUE; } }
switch (FileInformationClass) {
case FileBasicInformation: { PFILE_BASIC_INFORMATION FBI = (PFILE_BASIC_INFORMATION) Buffer; struct inode *Inode = &Mcb->Inode;
if (FBI->CreationTime.QuadPart != 0 && FBI->CreationTime.QuadPart != -1) { Inode->i_ctime = Ext2LinuxTime(FBI->CreationTime); Mcb->CreationTime = Ext2NtTime(Inode->i_ctime); NotifyFilter |= FILE_NOTIFY_CHANGE_CREATION; }
if (FBI->LastAccessTime.QuadPart != 0 && FBI->LastAccessTime.QuadPart != -1) { Inode->i_atime = Ext2LinuxTime(FBI->LastAccessTime); Mcb->LastAccessTime = Ext2NtTime(Inode->i_atime); NotifyFilter |= FILE_NOTIFY_CHANGE_LAST_ACCESS; }
if (FBI->LastWriteTime.QuadPart != 0 && FBI->LastWriteTime.QuadPart != -1) { Inode->i_mtime = Ext2LinuxTime(FBI->LastWriteTime); Mcb->LastWriteTime = Ext2NtTime(Inode->i_mtime); NotifyFilter |= FILE_NOTIFY_CHANGE_LAST_WRITE; SetFlag(Ccb->Flags, CCB_LAST_WRITE_UPDATED); }
if (FBI->ChangeTime.QuadPart !=0 && FBI->ChangeTime.QuadPart != -1) { Mcb->ChangeTime = FBI->ChangeTime; }
if (FBI->FileAttributes != 0) {
BOOLEAN bIsDirectory = IsDirectory(Fcb); NotifyFilter |= FILE_NOTIFY_CHANGE_ATTRIBUTES;
if (IsFlagOn(FBI->FileAttributes, FILE_ATTRIBUTE_READONLY)) { Ext2SetOwnerReadOnly(Inode->i_mode); } else { Ext2SetOwnerWritable(Inode->i_mode); }
if (FBI->FileAttributes & FILE_ATTRIBUTE_TEMPORARY) { SetFlag(FileObject->Flags, FO_TEMPORARY_FILE); } else { ClearFlag(FileObject->Flags, FO_TEMPORARY_FILE); }
Mcb->FileAttr = FBI->FileAttributes; if (bIsDirectory) { SetFlag(Mcb->FileAttr, FILE_ATTRIBUTE_DIRECTORY); ClearFlag(Mcb->FileAttr, FILE_ATTRIBUTE_NORMAL); } }
if (NotifyFilter != 0) { if (Ext2SaveInode(IrpContext, Vcb, Inode)) { Status = STATUS_SUCCESS; } }
ClearFlag(NotifyFilter, FILE_NOTIFY_CHANGE_LAST_ACCESS); Status = STATUS_SUCCESS; }
break;
case FileAllocationInformation: { PFILE_ALLOCATION_INFORMATION FAI = (PFILE_ALLOCATION_INFORMATION)Buffer; LARGE_INTEGER AllocationSize;
if (IsMcbDirectory(Mcb) || IsMcbSpecialFile(Mcb)) { Status = STATUS_INVALID_DEVICE_REQUEST; _SEH2_LEAVE; } else { Status = STATUS_SUCCESS; }
/* set Mcb to it's target */ if (IsMcbSymLink(Mcb)) { ASSERT(Fcb->Mcb == Mcb->Target); } Mcb = Fcb->Mcb;
/* get user specified allocationsize aligned with BLOCK_SIZE */ AllocationSize.QuadPart = CEILING_ALIGNED(ULONGLONG, (ULONGLONG)FAI->AllocationSize.QuadPart, (ULONGLONG)BLOCK_SIZE);
if (AllocationSize.QuadPart > Fcb->Header.AllocationSize.QuadPart) {
Status = Ext2ExpandFile(IrpContext, Vcb, Mcb, &AllocationSize); Fcb->Header.AllocationSize = AllocationSize; NotifyFilter = FILE_NOTIFY_CHANGE_SIZE; SetLongFlag(Fcb->Flags, FCB_ALLOC_IN_SETINFO);
} else if (AllocationSize.QuadPart < Fcb->Header.AllocationSize.QuadPart) {
if (MmCanFileBeTruncated(&(Fcb->SectionObject), &AllocationSize)) {
/* truncate file blocks */ Status = Ext2TruncateFile(IrpContext, Vcb, Mcb, &AllocationSize);
if (NT_SUCCESS(Status)) { ClearLongFlag(Fcb->Flags, FCB_ALLOC_IN_CREATE); }
NotifyFilter = FILE_NOTIFY_CHANGE_SIZE; Fcb->Header.AllocationSize.QuadPart = AllocationSize.QuadPart; if (Mcb->Inode.i_size > (loff_t)AllocationSize.QuadPart) { Mcb->Inode.i_size = AllocationSize.QuadPart; } Fcb->Header.FileSize.QuadPart = Mcb->Inode.i_size; if (Fcb->Header.ValidDataLength.QuadPart > Fcb->Header.FileSize.QuadPart) { Fcb->Header.ValidDataLength.QuadPart = Fcb->Header.FileSize.QuadPart; }
} else {
Status = STATUS_USER_MAPPED_FILE; DbgBreak(); _SEH2_LEAVE; } }
if (NotifyFilter) {
SetFlag(FileObject->Flags, FO_FILE_MODIFIED); SetLongFlag(Fcb->Flags, FCB_FILE_MODIFIED); Ext2SaveInode(IrpContext, Vcb, &Mcb->Inode); if (CcIsFileCached(FileObject)) { CcSetFileSizes(FileObject, (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize))); } }
DEBUG(DL_IO, ("Ext2SetInformation: %wZ NewSize=%I64xh AllocationSize=%I64xh " "FileSize=%I64xh VDL=%I64xh i_size=%I64xh status = %xh\n", &Fcb->Mcb->ShortName, AllocationSize.QuadPart, Fcb->Header.AllocationSize.QuadPart, Fcb->Header.FileSize.QuadPart, Fcb->Header.ValidDataLength.QuadPart, Mcb->Inode.i_size, Status)); }
break;
case FileEndOfFileInformation: { PFILE_END_OF_FILE_INFORMATION FEOFI = (PFILE_END_OF_FILE_INFORMATION) Buffer; LARGE_INTEGER NewSize, OldSize, EndOfFile;
if (IsMcbDirectory(Mcb) || IsMcbSpecialFile(Mcb)) { Status = STATUS_INVALID_DEVICE_REQUEST; _SEH2_LEAVE; } else { Status = STATUS_SUCCESS; }
/* set Mcb to it's target */ if (IsMcbSymLink(Mcb)) { ASSERT(Fcb->Mcb == Mcb->Target); } Mcb = Fcb->Mcb;
OldSize = Fcb->Header.AllocationSize; EndOfFile = FEOFI->EndOfFile;
if (IoStackLocation->Parameters.SetFile.AdvanceOnly) {
if (IsFlagOn(Fcb->Flags, FCB_DELETE_PENDING)) { _SEH2_LEAVE; }
if (EndOfFile.QuadPart > Fcb->Header.FileSize.QuadPart) { EndOfFile.QuadPart = Fcb->Header.FileSize.QuadPart; }
if (EndOfFile.QuadPart > Fcb->Header.ValidDataLength.QuadPart) { Fcb->Header.ValidDataLength.QuadPart = EndOfFile.QuadPart; NotifyFilter = FILE_NOTIFY_CHANGE_SIZE; }
_SEH2_LEAVE; }
NewSize.QuadPart = CEILING_ALIGNED(ULONGLONG, EndOfFile.QuadPart, BLOCK_SIZE);
if (NewSize.QuadPart > OldSize.QuadPart) {
Fcb->Header.AllocationSize = NewSize; Status = Ext2ExpandFile( IrpContext, Vcb, Mcb, &(Fcb->Header.AllocationSize) ); NotifyFilter = FILE_NOTIFY_CHANGE_SIZE; SetLongFlag(Fcb->Flags, FCB_ALLOC_IN_SETINFO);
} else if (NewSize.QuadPart == OldSize.QuadPart) {
/* we are luck ;) */ Status = STATUS_SUCCESS;
} else {
/* don't truncate file data since it's still being written */ if (IsFlagOn(Fcb->Flags, FCB_ALLOC_IN_WRITE)) {
Status = STATUS_SUCCESS;
} else {
if (!MmCanFileBeTruncated(&(Fcb->SectionObject), &NewSize)) { Status = STATUS_USER_MAPPED_FILE; DbgBreak(); _SEH2_LEAVE; }
/* truncate file blocks */ Status = Ext2TruncateFile(IrpContext, Vcb, Mcb, &NewSize);
/* restore original file size */ if (NT_SUCCESS(Status)) { ClearLongFlag(Fcb->Flags, FCB_ALLOC_IN_CREATE); }
/* update file allocateion size */ Fcb->Header.AllocationSize.QuadPart = NewSize.QuadPart;
ASSERT((loff_t)NewSize.QuadPart >= Mcb->Inode.i_size); if ((loff_t)Fcb->Header.FileSize.QuadPart < Mcb->Inode.i_size) { Fcb->Header.FileSize.QuadPart = Mcb->Inode.i_size; } if (Fcb->Header.ValidDataLength.QuadPart > Fcb->Header.FileSize.QuadPart) { Fcb->Header.ValidDataLength.QuadPart = Fcb->Header.FileSize.QuadPart; }
SetFlag(FileObject->Flags, FO_FILE_MODIFIED); SetLongFlag(Fcb->Flags, FCB_FILE_MODIFIED); }
NotifyFilter = FILE_NOTIFY_CHANGE_SIZE; }
if (NT_SUCCESS(Status)) {
Fcb->Header.FileSize.QuadPart = Mcb->Inode.i_size = EndOfFile.QuadPart; if (CcIsFileCached(FileObject)) { CcSetFileSizes(FileObject, (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize))); }
if (Fcb->Header.FileSize.QuadPart >= 0x80000000 && !IsFlagOn(SUPER_BLOCK->s_feature_ro_compat, EXT2_FEATURE_RO_COMPAT_LARGE_FILE)) { SetFlag(SUPER_BLOCK->s_feature_ro_compat, EXT2_FEATURE_RO_COMPAT_LARGE_FILE); Ext2SaveSuper(IrpContext, Vcb); }
SetFlag(FileObject->Flags, FO_FILE_MODIFIED); SetLongFlag(Fcb->Flags, FCB_FILE_MODIFIED); NotifyFilter = FILE_NOTIFY_CHANGE_SIZE; }
Ext2SaveInode( IrpContext, Vcb, &Mcb->Inode);
DEBUG(DL_IO, ("Ext2SetInformation: FileEndOfFileInformation %wZ EndofFile=%I64xh " "AllocatieonSize=%I64xh FileSize=%I64xh VDL=%I64xh i_size=%I64xh status = %xh\n", &Fcb->Mcb->ShortName, EndOfFile.QuadPart, Fcb->Header.AllocationSize.QuadPart, Fcb->Header.FileSize.QuadPart, Fcb->Header.ValidDataLength.QuadPart, Mcb->Inode.i_size, Status)); }
break;
case FileValidDataLengthInformation: { PFILE_VALID_DATA_LENGTH_INFORMATION FVDL = (PFILE_VALID_DATA_LENGTH_INFORMATION) Buffer; LARGE_INTEGER NewVDL;
if (IsMcbDirectory(Mcb) || IsMcbSpecialFile(Mcb)) { Status = STATUS_INVALID_DEVICE_REQUEST; _SEH2_LEAVE; } else { Status = STATUS_SUCCESS; }
NewVDL = FVDL->ValidDataLength; if ((NewVDL.QuadPart < Fcb->Header.ValidDataLength.QuadPart)) { Status = STATUS_INVALID_PARAMETER; _SEH2_LEAVE; } if (NewVDL.QuadPart > Fcb->Header.FileSize.QuadPart) NewVDL = Fcb->Header.FileSize;
if (!MmCanFileBeTruncated(FileObject->SectionObjectPointer, &NewVDL)) { Status = STATUS_USER_MAPPED_FILE; _SEH2_LEAVE; }
Fcb->Header.ValidDataLength = NewVDL; FileObject->Flags |= FO_FILE_MODIFIED; if (CcIsFileCached(FileObject)) { CcSetFileSizes(FileObject, (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize))); } }
break;
case FileDispositionInformation: { PFILE_DISPOSITION_INFORMATION FDI = (PFILE_DISPOSITION_INFORMATION)Buffer;
Status = Ext2SetDispositionInfo(IrpContext, Vcb, Fcb, Ccb, FDI->DeleteFile);
DEBUG(DL_INF, ( "Ext2SetInformation: SetDispositionInformation: DeleteFile=%d %wZ status = %xh\n", FDI->DeleteFile, &Mcb->ShortName, Status)); }
break;
case FileRenameInformation: { Status = Ext2SetRenameInfo(IrpContext, Vcb, Fcb, Ccb); }
break;
case FileLinkInformation: { Status = Ext2SetLinkInfo(IrpContext, Vcb, Fcb, Ccb); }
break;
// // This is the only set file information request supported on read // only file systems // case FilePositionInformation: { PFILE_POSITION_INFORMATION FilePositionInformation;
if (Length < sizeof(FILE_POSITION_INFORMATION)) { Status = STATUS_INVALID_PARAMETER; _SEH2_LEAVE; }
FilePositionInformation = (PFILE_POSITION_INFORMATION) Buffer;
if ((FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) && (FilePositionInformation->CurrentByteOffset.LowPart & DeviceObject->AlignmentRequirement) ) { Status = STATUS_INVALID_PARAMETER; _SEH2_LEAVE; }
FileObject->CurrentByteOffset = FilePositionInformation->CurrentByteOffset;
Status = STATUS_SUCCESS; _SEH2_LEAVE; }
break;
default: DEBUG(DL_WRN, ( "Ext2SetInformation: invalid class: %d\n", FileInformationClass)); Status = STATUS_INVALID_PARAMETER;/* STATUS_INVALID_INFO_CLASS; */ }
} _SEH2_FINALLY {
if (FcbPagingIoResourceAcquired) { ExReleaseResourceLite(&Fcb->PagingIoResource); }
if (NT_SUCCESS(Status) && (NotifyFilter != 0)) { Ext2NotifyReportChange( IrpContext, Vcb, Mcb, NotifyFilter, FILE_ACTION_MODIFIED );
}
if (FcbMainResourceAcquired) { ExReleaseResourceLite(&Fcb->MainResource); }
if (!IrpContext->ExceptionInProgress) { if (Status == STATUS_PENDING || Status == STATUS_CANT_WAIT ) { DbgBreak(); Status = Ext2QueueRequest(IrpContext); } else { Ext2CompleteIrpContext(IrpContext, Status); } } } _SEH2_END;
return Status;}
ULONGExt2TotalBlocks( PEXT2_VCB Vcb, PLARGE_INTEGER Size, PULONG pMeta){ ULONG Blocks, Meta =0, Remain;
Blocks = (ULONG)((Size->QuadPart + BLOCK_SIZE - 1) >> BLOCK_BITS); if (Blocks <= EXT2_NDIR_BLOCKS) goto errorout; Blocks -= EXT2_NDIR_BLOCKS;
Meta += 1; if (Blocks <= Vcb->max_blocks_per_layer[1]) { goto errorout; } Blocks -= Vcb->max_blocks_per_layer[1];
level2:
if (Blocks <= Vcb->max_blocks_per_layer[2]) { Meta += 1 + ((Blocks + BLOCK_SIZE/4 - 1) >> (BLOCK_BITS - 2)); goto errorout; } Meta += 1 + BLOCK_SIZE/4; Blocks -= Vcb->max_blocks_per_layer[2];
if (Blocks > Vcb->max_blocks_per_layer[3]) { Blocks = Vcb->max_blocks_per_layer[3]; }
ASSERT(Vcb->max_blocks_per_layer[2]); Remain = Blocks % Vcb->max_blocks_per_layer[2]; Blocks = Blocks / Vcb->max_blocks_per_layer[2]; Meta += 1 + Blocks * (1 + BLOCK_SIZE/4); if (Remain) { Blocks = Remain; goto level2; }
errorout:
if (pMeta) *pMeta = Meta; Blocks = (ULONG)((Size->QuadPart + BLOCK_SIZE - 1) >> BLOCK_BITS); return (Blocks + Meta);}
NTSTATUSExt2BlockMap( IN PEXT2_IRP_CONTEXT IrpContext, IN PEXT2_VCB Vcb, IN PEXT2_MCB Mcb, IN ULONG Index, IN BOOLEAN bAlloc, OUT PULONG pBlock, OUT PULONG Number){ NTSTATUS status;
if (INODE_HAS_EXTENT(&Mcb->Inode)) { status = Ext2MapExtent(IrpContext, Vcb, Mcb, Index, bAlloc, pBlock, Number ); } else { status = Ext2MapIndirect(IrpContext, Vcb, Mcb, Index, bAlloc, pBlock, Number ); }
return status;}
NTSTATUSExt2ExpandFile( PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb, PEXT2_MCB Mcb, PLARGE_INTEGER Size){ NTSTATUS status = STATUS_SUCCESS; ULONG Start = 0; ULONG End = 0;
Start = (ULONG)((Mcb->Inode.i_size + BLOCK_SIZE - 1) >> BLOCK_BITS); End = (ULONG)((Size->QuadPart + BLOCK_SIZE - 1) >> BLOCK_BITS);
/* it's a truncate operation, not expanding */ if (Start >= End) { Size->QuadPart = ((LONGLONG) Start) << BLOCK_BITS; return STATUS_SUCCESS; }
/* ignore special files */ if (IsMcbSpecialFile(Mcb)) { return STATUS_INVALID_DEVICE_REQUEST; }
/* expandind file extents */ if (INODE_HAS_EXTENT(&Mcb->Inode)) {
status = Ext2ExpandExtent(IrpContext, Vcb, Mcb, Start, End, Size);
} else {
BOOLEAN do_expand;
#if EXT2_PRE_ALLOCATION_SUPPORT do_expand = TRUE;#else do_expand = (IrpContext->MajorFunction == IRP_MJ_WRITE) || IsMcbDirectory(Mcb);#endif if (!do_expand) goto errorout;
status = Ext2ExpandIndirect(IrpContext, Vcb, Mcb, Start, End, Size); }
errorout: return status;}
NTSTATUSExt2TruncateFile( PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb, PEXT2_MCB Mcb, PLARGE_INTEGER Size){ NTSTATUS status = STATUS_SUCCESS;
if (INODE_HAS_EXTENT(&Mcb->Inode)) { status = Ext2TruncateExtent(IrpContext, Vcb, Mcb, Size); } else { status = Ext2TruncateIndirect(IrpContext, Vcb, Mcb, Size); }
/* check and clear data/meta mcb extents */ if (Size->QuadPart == 0) {
/* check and remove all data extents */ if (Ext2ListExtents(&Mcb->Extents)) { DbgBreak(); } Ext2ClearAllExtents(&Mcb->Extents); /* check and remove all meta extents */ if (Ext2ListExtents(&Mcb->MetaExts)) { DbgBreak(); } Ext2ClearAllExtents(&Mcb->MetaExts); ClearLongFlag(Mcb->Flags, MCB_ZONE_INITED); }
return status;}
NTSTATUSExt2IsFileRemovable( IN PEXT2_IRP_CONTEXT IrpContext, IN PEXT2_VCB Vcb, IN PEXT2_FCB Fcb, IN PEXT2_CCB Ccb){ PEXT2_MCB Mcb = Fcb->Mcb;
if (Mcb->Inode.i_ino == EXT2_ROOT_INO) { return STATUS_CANNOT_DELETE; }
if (IsMcbDirectory(Mcb)) { if (!Ext2IsDirectoryEmpty(IrpContext, Vcb, Mcb)) { return STATUS_DIRECTORY_NOT_EMPTY; } }
if (!MmFlushImageSection(&Fcb->SectionObject, MmFlushForDelete )) { return STATUS_CANNOT_DELETE; }
if (IsMcbDirectory(Mcb)) { FsRtlNotifyFullChangeDirectory( Vcb->NotifySync, &Vcb->NotifyList, Ccb, NULL, FALSE, FALSE, 0, NULL, NULL, NULL ); }
return STATUS_SUCCESS;}
NTSTATUSExt2SetDispositionInfo( PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb, PEXT2_FCB Fcb, PEXT2_CCB Ccb, BOOLEAN bDelete){ PIRP Irp = IrpContext->Irp; PIO_STACK_LOCATION IrpSp; NTSTATUS status = STATUS_SUCCESS; PEXT2_MCB Mcb = Fcb->Mcb;
IrpSp = IoGetCurrentIrpStackLocation(Irp);
DEBUG(DL_INF, ( "Ext2SetDispositionInfo: bDelete=%x\n", bDelete));
if (bDelete) {
DEBUG(DL_INF, ( "Ext2SetDispositionInformation: Removing %wZ.\n", &Mcb->FullName));
if (Ccb->SymLink || IsInodeSymLink(&Mcb->Inode)) { /* always allow deleting on symlinks */ } else { status = Ext2IsFileRemovable(IrpContext, Vcb, Fcb, Ccb); }
if (NT_SUCCESS(status)) { SetLongFlag(Fcb->Flags, FCB_DELETE_PENDING); IrpSp->FileObject->DeletePending = TRUE; }
} else {
ClearLongFlag(Fcb->Flags, FCB_DELETE_PENDING); IrpSp->FileObject->DeletePending = FALSE; }
return status;}
NTSTATUSExt2SetRenameInfo( PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb, PEXT2_FCB Fcb, PEXT2_CCB Ccb){ PEXT2_MCB Mcb = Fcb->Mcb;
PEXT2_FCB TargetDcb = NULL; /* Dcb of target directory */ PEXT2_MCB TargetMcb = NULL; PEXT2_FCB ParentDcb = NULL; /* Dcb of it's current parent */ PEXT2_MCB ParentMcb = NULL;
PEXT2_FCB ExistingFcb = NULL; /* Target file Fcb if it exists*/ PEXT2_MCB ExistingMcb = NULL;
UNICODE_STRING FileName;
NTSTATUS Status;
PIRP Irp; PIO_STACK_LOCATION IrpSp;
PFILE_OBJECT FileObject; PFILE_OBJECT TargetObject;
struct dentry *NewEntry = NULL;
BOOLEAN ReplaceIfExists; BOOLEAN bMove = FALSE; BOOLEAN bTargetRemoved = FALSE;
BOOLEAN bFcbLockAcquired = FALSE;
PFILE_RENAME_INFORMATION FRI;
if (Ccb->SymLink) { Mcb = Ccb->SymLink; }
if (Mcb->Inode.i_ino == EXT2_ROOT_INO) { Status = STATUS_INVALID_PARAMETER; goto errorout; }
Irp = IrpContext->Irp; IrpSp = IoGetCurrentIrpStackLocation(Irp);
FileObject = IrpSp->FileObject; TargetObject = IrpSp->Parameters.SetFile.FileObject; ReplaceIfExists = IrpSp->Parameters.SetFile.ReplaceIfExists;
FRI = (PFILE_RENAME_INFORMATION)Irp->AssociatedIrp.SystemBuffer;
if (TargetObject == NULL) {
UNICODE_STRING NewName;
NewName.Buffer = FRI->FileName; NewName.MaximumLength = NewName.Length = (USHORT)FRI->FileNameLength;
while (NewName.Length > 0 && NewName.Buffer[NewName.Length/2 - 1] == L'\\') { NewName.Buffer[NewName.Length/2 - 1] = 0; NewName.Length -= 2; }
while (NewName.Length > 0 && NewName.Buffer[NewName.Length/2 - 1] != L'\\') { NewName.Length -= 2; }
NewName.Buffer = (USHORT *)((UCHAR *)NewName.Buffer + NewName.Length); NewName.Length = (USHORT)(FRI->FileNameLength - NewName.Length);
FileName = NewName;
TargetMcb = Mcb->Parent; if (IsMcbSymLink(TargetMcb)) { TargetMcb = TargetMcb->Target; ASSERT(!IsMcbSymLink(TargetMcb)); }
if (TargetMcb == NULL || FileName.Length >= EXT2_NAME_LEN*2) { Status = STATUS_OBJECT_NAME_INVALID; goto errorout; }
} else {
TargetDcb = (PEXT2_FCB)(TargetObject->FsContext);
if (!TargetDcb || TargetDcb->Vcb != Vcb) {
DbgBreak();
Status = STATUS_INVALID_PARAMETER; goto errorout; }
TargetMcb = TargetDcb->Mcb; FileName = TargetObject->FileName; }
if (FsRtlDoesNameContainWildCards(&FileName)) { Status = STATUS_OBJECT_NAME_INVALID; goto errorout; }
if (TargetMcb->Inode.i_ino == Mcb->Parent->Inode.i_ino) { if (FsRtlAreNamesEqual( &FileName, &(Mcb->ShortName), FALSE, NULL )) { Status = STATUS_SUCCESS; goto errorout; } } else { bMove = TRUE; }
if (!bFcbLockAcquired) { ExAcquireResourceExclusiveLite(&Vcb->FcbLock, TRUE); bFcbLockAcquired = TRUE; }
TargetDcb = TargetMcb->Fcb; if (TargetDcb == NULL) { TargetDcb = Ext2AllocateFcb(Vcb, TargetMcb); } if (TargetDcb) { Ext2ReferXcb(&TargetDcb->ReferenceCount); }
ParentMcb = Mcb->Parent; ParentDcb = ParentMcb->Fcb;
if ((TargetMcb->Inode.i_ino != ParentMcb->Inode.i_ino)) {
if (ParentDcb == NULL) { ParentDcb = Ext2AllocateFcb(Vcb, ParentMcb); } } if (ParentDcb) { Ext2ReferXcb(&ParentDcb->ReferenceCount); }
if (bFcbLockAcquired) { ExReleaseResourceLite(&Vcb->FcbLock); bFcbLockAcquired = FALSE; }
if (!TargetDcb || !ParentDcb) { Status = STATUS_INSUFFICIENT_RESOURCES; goto errorout; }
DEBUG(DL_RES, ("Ext2SetRenameInfo: rename %wZ to %wZ\\%wZ\n", &Mcb->FullName, &TargetMcb->FullName, &FileName));
Status = Ext2LookupFile( IrpContext, Vcb, &FileName, TargetMcb, &ExistingMcb, 0 );
if (NT_SUCCESS(Status) && ExistingMcb != Mcb) {
if (!ReplaceIfExists) {
Status = STATUS_OBJECT_NAME_COLLISION; DEBUG(DL_RES, ("Ext2SetRenameInfo: Target file %wZ exists\n", &ExistingMcb->FullName)); goto errorout;
} else {
if ( (ExistingFcb = ExistingMcb->Fcb) && !IsMcbSymLink(ExistingMcb) ) {
Status = Ext2IsFileRemovable(IrpContext, Vcb, ExistingFcb, Ccb); if (!NT_SUCCESS(Status)) { DEBUG(DL_REN, ("Ext2SetRenameInfo: Target file %wZ cannot be removed.\n", &ExistingMcb->FullName)); goto errorout; } }
Status = Ext2DeleteFile(IrpContext, Vcb, ExistingFcb, ExistingMcb); if (!NT_SUCCESS(Status)) { DEBUG(DL_REN, ("Ext2SetRenameInfo: Failed to delete %wZ with status: %xh.\n", &FileName, Status));
goto errorout; }
bTargetRemoved = TRUE; } }
/* remove directory entry of old name */ Status = Ext2RemoveEntry(IrpContext, Vcb, ParentDcb, Mcb); if (!NT_SUCCESS(Status)) { DEBUG(DL_REN, ("Ext2SetRenameInfo: Failed to remove entry %wZ with status %xh.\n", &Mcb->FullName, Status)); DbgBreak(); goto errorout; }
/* add new entry for new target name */ Status = Ext2AddEntry(IrpContext, Vcb, TargetDcb, &Mcb->Inode, &FileName, &NewEntry); if (!NT_SUCCESS(Status)) { DEBUG(DL_REN, ("Ext2SetRenameInfo: Failed to add entry for %wZ with status: %xh.\n", &FileName, Status)); Ext2AddEntry(IrpContext, Vcb, ParentDcb, &Mcb->Inode, &Mcb->ShortName, &NewEntry); goto errorout; }
/* correct the inode number in .. entry */ if (IsMcbDirectory(Mcb)) { Status = Ext2SetParentEntry( IrpContext, Vcb, Fcb, ParentMcb->Inode.i_ino, TargetMcb->Inode.i_ino ); if (!NT_SUCCESS(Status)) { DEBUG(DL_REN, ("Ext2SetRenameInfo: Failed to set parent refer of %wZ with %xh.\n", &Mcb->FullName, Status)); DbgBreak(); goto errorout; } }
/* Update current dentry from the newly created one. We need keep the original dentry to assure children's links are valid if current entry is a directory */ if (Mcb->de) { char *np = Mcb->de->d_name.name; *(Mcb->de) = *NewEntry; NewEntry->d_name.name = np; }
if (bTargetRemoved) { Ext2NotifyReportChange( IrpContext, Vcb, ExistingMcb, (IsMcbDirectory(ExistingMcb) ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME ), FILE_ACTION_REMOVED); }
if (NT_SUCCESS(Status)) {
if (bMove) { Ext2NotifyReportChange( IrpContext, Vcb, Mcb, (IsDirectory(Fcb) ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME ), FILE_ACTION_REMOVED);
} else { Ext2NotifyReportChange( IrpContext, Vcb, Mcb, (IsDirectory(Fcb) ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME ), FILE_ACTION_RENAMED_OLD_NAME);
}
if (TargetMcb->Inode.i_ino != ParentMcb->Inode.i_ino) { Ext2RemoveMcb(Vcb, Mcb); Ext2InsertMcb(Vcb, TargetMcb, Mcb); }
if (!Ext2BuildName( &Mcb->ShortName, &FileName, NULL )) { Status = STATUS_INSUFFICIENT_RESOURCES; goto errorout; }
if (!Ext2BuildName( &Mcb->FullName, &FileName, &TargetMcb->FullName)) { Status = STATUS_INSUFFICIENT_RESOURCES; goto errorout; }
if (bMove) { Ext2NotifyReportChange( IrpContext, Vcb, Mcb, (IsDirectory(Fcb) ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME ), FILE_ACTION_ADDED); } else { Ext2NotifyReportChange( IrpContext, Vcb, Mcb, (IsDirectory(Fcb) ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME ), FILE_ACTION_RENAMED_NEW_NAME ); } }
errorout:
if (bFcbLockAcquired) { ExReleaseResourceLite(&Vcb->FcbLock); bFcbLockAcquired = FALSE; }
if (NewEntry) Ext2FreeEntry(NewEntry);
if (TargetDcb) { Ext2ReleaseFcb(TargetDcb); }
if (ParentDcb) { Ext2ReleaseFcb(ParentDcb); }
if (ExistingMcb) Ext2DerefMcb(ExistingMcb);
return Status;}
NTSTATUSExt2SetLinkInfo( PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb, PEXT2_FCB Fcb, PEXT2_CCB Ccb){ PEXT2_MCB Mcb = Fcb->Mcb;
PEXT2_FCB TargetDcb = NULL; /* Dcb of target directory */ PEXT2_MCB TargetMcb = NULL; PEXT2_FCB ParentDcb = NULL; /* Dcb of it's current parent */ PEXT2_MCB ParentMcb = NULL;
PEXT2_FCB ExistingFcb = NULL; /* Target file Fcb if it exists*/ PEXT2_MCB ExistingMcb = NULL; PEXT2_MCB LinkMcb = NULL; /* Mcb for new hardlink */
UNICODE_STRING FileName;
NTSTATUS Status;
PIRP Irp; PIO_STACK_LOCATION IrpSp;
PFILE_OBJECT FileObject; PFILE_OBJECT TargetObject;
BOOLEAN ReplaceIfExists; BOOLEAN bTargetRemoved = FALSE;
BOOLEAN bFcbLockAcquired = FALSE;
PFILE_LINK_INFORMATION FLI;
if (Ccb->SymLink) { Mcb = Ccb->SymLink; }
if (IsMcbDirectory(Mcb)) { Status = STATUS_INVALID_PARAMETER; goto errorout; }
Irp = IrpContext->Irp; IrpSp = IoGetCurrentIrpStackLocation(Irp);
FileObject = IrpSp->FileObject; TargetObject = IrpSp->Parameters.SetFile.FileObject; ReplaceIfExists = IrpSp->Parameters.SetFile.ReplaceIfExists;
FLI = (PFILE_LINK_INFORMATION)Irp->AssociatedIrp.SystemBuffer;
if (TargetObject == NULL) {
UNICODE_STRING NewName;
NewName.Buffer = FLI->FileName; NewName.MaximumLength = NewName.Length = (USHORT)FLI->FileNameLength;
while (NewName.Length > 0 && NewName.Buffer[NewName.Length/2 - 1] == L'\\') { NewName.Buffer[NewName.Length/2 - 1] = 0; NewName.Length -= 2; }
while (NewName.Length > 0 && NewName.Buffer[NewName.Length/2 - 1] != L'\\') { NewName.Length -= 2; }
NewName.Buffer = (USHORT *)((UCHAR *)NewName.Buffer + NewName.Length); NewName.Length = (USHORT)(FLI->FileNameLength - NewName.Length);
FileName = NewName;
TargetMcb = Mcb->Parent; if (IsMcbSymLink(TargetMcb)) { TargetMcb = TargetMcb->Target; ASSERT(!IsMcbSymLink(TargetMcb)); }
if (TargetMcb == NULL || FileName.Length >= EXT2_NAME_LEN*2) { Status = STATUS_OBJECT_NAME_INVALID; goto errorout; }
} else {
TargetDcb = (PEXT2_FCB)(TargetObject->FsContext); if (!TargetDcb || TargetDcb->Vcb != Vcb) { DbgBreak(); Status = STATUS_INVALID_PARAMETER; goto errorout; }
TargetMcb = TargetDcb->Mcb; FileName = TargetObject->FileName; }
if (FsRtlDoesNameContainWildCards(&FileName)) { Status = STATUS_OBJECT_NAME_INVALID; goto errorout; }
if (TargetMcb->Inode.i_ino == Mcb->Parent->Inode.i_ino) { if (FsRtlAreNamesEqual( &FileName, &(Mcb->ShortName), FALSE, NULL )) { Status = STATUS_SUCCESS; goto errorout; } }
ExAcquireResourceExclusiveLite(&Vcb->FcbLock, TRUE); bFcbLockAcquired = TRUE;
TargetDcb = TargetMcb->Fcb; if (TargetDcb == NULL) { TargetDcb = Ext2AllocateFcb(Vcb, TargetMcb); } if (TargetDcb) { Ext2ReferXcb(&TargetDcb->ReferenceCount); }
ParentMcb = Mcb->Parent; ParentDcb = ParentMcb->Fcb;
if ((TargetMcb->Inode.i_ino != ParentMcb->Inode.i_ino)) {
if (ParentDcb == NULL) { ParentDcb = Ext2AllocateFcb(Vcb, ParentMcb); } } if (ParentDcb) { Ext2ReferXcb(&ParentDcb->ReferenceCount); }
if (bFcbLockAcquired) { ExReleaseResourceLite(&Vcb->FcbLock); bFcbLockAcquired = FALSE; }
if (!TargetDcb || !ParentDcb) { Status = STATUS_INSUFFICIENT_RESOURCES; goto errorout; }
DEBUG(DL_RES, ("Ext2SetLinkInfo: %wZ\\%wZ -> %wZ\n", &TargetMcb->FullName, &FileName, &Mcb->FullName));
Status = Ext2LookupFile(IrpContext, Vcb, &FileName, TargetMcb, &ExistingMcb, 0); if (NT_SUCCESS(Status) && ExistingMcb != Mcb) {
if (!ReplaceIfExists) {
Status = STATUS_OBJECT_NAME_COLLISION; DEBUG(DL_RES, ("Ext2SetRenameInfo: Target file %wZ exists\n", &ExistingMcb->FullName)); goto errorout;
} else {
if ( (ExistingFcb = ExistingMcb->Fcb) && !IsMcbSymLink(ExistingMcb) ) { Status = Ext2IsFileRemovable(IrpContext, Vcb, ExistingFcb, Ccb); if (!NT_SUCCESS(Status)) { DEBUG(DL_REN, ("Ext2SetRenameInfo: Target file %wZ cannot be removed.\n", &ExistingMcb->FullName)); goto errorout; } }
Status = Ext2DeleteFile(IrpContext, Vcb, ExistingFcb, ExistingMcb); if (!NT_SUCCESS(Status)) { DEBUG(DL_REN, ("Ext2SetRenameInfo: Failed to delete %wZ with status: %xh.\n", &FileName, Status));
goto errorout; } bTargetRemoved = TRUE; } }
/* add new entry for new target name */ Status = Ext2AddEntry(IrpContext, Vcb, TargetDcb, &Mcb->Inode, &FileName, NULL); if (!NT_SUCCESS(Status)) { DEBUG(DL_REN, ("Ext2SetLinkInfo: Failed to add entry for %wZ with status: %xh.\n", &FileName, Status)); goto errorout; }
if (bTargetRemoved) { Ext2NotifyReportChange( IrpContext, Vcb, ExistingMcb, (IsMcbDirectory(ExistingMcb) ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME ), FILE_ACTION_REMOVED); }
if (NT_SUCCESS(Status)) {
Ext2LookupFile(IrpContext, Vcb, &FileName, TargetMcb, &LinkMcb, 0); if (!LinkMcb) goto errorout;
Ext2NotifyReportChange( IrpContext, Vcb, LinkMcb, FILE_NOTIFY_CHANGE_FILE_NAME, FILE_ACTION_ADDED); }
errorout:
if (bFcbLockAcquired) { ExReleaseResourceLite(&Vcb->FcbLock); bFcbLockAcquired = FALSE; }
if (TargetDcb) { Ext2ReleaseFcb(TargetDcb); }
if (ParentDcb) { Ext2ReleaseFcb(ParentDcb); }
if (ExistingMcb) Ext2DerefMcb(ExistingMcb);
if (LinkMcb) Ext2DerefMcb(LinkMcb);
return Status;}
ULONGExt2InodeType(PEXT2_MCB Mcb){ if (IsMcbSymLink(Mcb)) { return EXT2_FT_SYMLINK; }
if (IsMcbDirectory(Mcb)) { return EXT2_FT_DIR; }
return EXT2_FT_REG_FILE;}
NTSTATUSExt2DeleteFile( PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb, PEXT2_FCB Fcb, PEXT2_MCB Mcb){ PEXT2_FCB Dcb = NULL;
NTSTATUS Status = STATUS_UNSUCCESSFUL;
BOOLEAN VcbResourceAcquired = FALSE; BOOLEAN FcbPagingIoAcquired = FALSE; BOOLEAN FcbResourceAcquired = FALSE; BOOLEAN DcbResourceAcquired = FALSE;
LARGE_INTEGER Size; LARGE_INTEGER SysTime;
BOOLEAN bFcbLockAcquired = FALSE;
DEBUG(DL_INF, ( "Ext2DeleteFile: File %wZ (%xh) will be deleted!\n", &Mcb->FullName, Mcb->Inode.i_ino));
if (IsFlagOn(Mcb->Flags, MCB_FILE_DELETED)) { return STATUS_SUCCESS; }
if (!IsMcbSymLink(Mcb) && IsMcbDirectory(Mcb)) { if (!Ext2IsDirectoryEmpty(IrpContext, Vcb, Mcb)) { return STATUS_DIRECTORY_NOT_EMPTY; } }
_SEH2_TRY {
Ext2ReferMcb(Mcb);
ExAcquireResourceExclusiveLite(&Vcb->MainResource, TRUE); VcbResourceAcquired = TRUE;
ExAcquireResourceExclusiveLite(&Vcb->FcbLock, TRUE); bFcbLockAcquired = TRUE;
/* Mcb->Parent could be NULL when working with layered file systems */ if (Mcb->Parent) { Dcb = Mcb->Parent->Fcb; if (!Dcb) Dcb = Ext2AllocateFcb(Vcb, Mcb->Parent); } if (Dcb) Ext2ReferXcb(&Dcb->ReferenceCount);
if (bFcbLockAcquired) { ExReleaseResourceLite(&Vcb->FcbLock); bFcbLockAcquired = FALSE; }
if (Dcb) { DcbResourceAcquired = ExAcquireResourceExclusiveLite(&Dcb->MainResource, TRUE);
/* remove it's entry form it's parent */ Status = Ext2RemoveEntry(IrpContext, Vcb, Dcb, Mcb); }
if (NT_SUCCESS(Status)) {
SetFlag(Mcb->Flags, MCB_FILE_DELETED); Ext2RemoveMcb(Vcb, Mcb);
if (Fcb) { FcbResourceAcquired = ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE);
FcbPagingIoAcquired = ExAcquireResourceExclusiveLite(&Fcb->PagingIoResource, TRUE); }
if (DcbResourceAcquired) { ExReleaseResourceLite(&Dcb->MainResource); DcbResourceAcquired = FALSE; }
if (VcbResourceAcquired) { ExReleaseResourceLite(&Vcb->MainResource); VcbResourceAcquired = FALSE; }
if (IsMcbSymLink(Mcb)) { if (Mcb->Inode.i_nlink > 0) { Status = STATUS_CANNOT_DELETE; _SEH2_LEAVE; } } else if (!IsMcbDirectory(Mcb)) { if (Mcb->Inode.i_nlink > 0) { _SEH2_LEAVE; } } else { if (Mcb->Inode.i_nlink >= 2) { _SEH2_LEAVE; } }
if (S_ISLNK(Mcb->Inode.i_mode)) {
/* for symlink, we should do differenctly */ if (Mcb->Inode.i_size > EXT2_LINKLEN_IN_INODE) { Size.QuadPart = (LONGLONG)0; Status = Ext2TruncateFile(IrpContext, Vcb, Mcb, &Size); }
} else {
/* truncate file size */ Size.QuadPart = (LONGLONG)0; Status = Ext2TruncateFile(IrpContext, Vcb, Mcb, &Size);
/* check file offset mappings */ DEBUG(DL_EXT, ("Ext2DeleteFile ...: %wZ\n", &Mcb->FullName));
if (Fcb) { Fcb->Header.AllocationSize.QuadPart = Size.QuadPart; if (Fcb->Header.FileSize.QuadPart > Size.QuadPart) { Fcb->Header.FileSize.QuadPart = Size.QuadPart; Fcb->Mcb->Inode.i_size = Size.QuadPart; } if (Fcb->Header.ValidDataLength.QuadPart > Fcb->Header.FileSize.QuadPart) { Fcb->Header.ValidDataLength.QuadPart = Fcb->Header.FileSize.QuadPart; } } else if (Mcb) { /* Update the inode's data length . It should be ZERO if succeeds. */ if (Mcb->Inode.i_size > (loff_t)Size.QuadPart) { Mcb->Inode.i_size = Size.QuadPart; } } }
/* set delete time and free the inode */ KeQuerySystemTime(&SysTime); Mcb->Inode.i_nlink = 0; Mcb->Inode.i_dtime = Ext2LinuxTime(SysTime); Ext2SaveInode(IrpContext, Vcb, &Mcb->Inode); Ext2FreeInode(IrpContext, Vcb, Mcb->Inode.i_ino, Ext2InodeType(Mcb)); }
} _SEH2_FINALLY {
if (FcbPagingIoAcquired) { ExReleaseResourceLite(&Fcb->PagingIoResource); }
if (FcbResourceAcquired) { ExReleaseResourceLite(&Fcb->MainResource); }
if (DcbResourceAcquired) { ExReleaseResourceLite(&Dcb->MainResource); }
if (bFcbLockAcquired) { ExReleaseResourceLite(&Vcb->FcbLock); }
if (VcbResourceAcquired) { ExReleaseResourceLite(&Vcb->MainResource); }
if (Dcb) { Ext2ReleaseFcb(Dcb); }
Ext2DerefMcb(Mcb); } _SEH2_END;
DEBUG(DL_INF, ( "Ext2DeleteFile: %wZ Succeed... EXT2SB->S_FREE_BLOCKS = %I64xh .\n", &Mcb->FullName, ext3_free_blocks_count(SUPER_BLOCK)));
return Status;}