INT Ext2RecoverJournal( PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb ) { INT rc = 0; ULONG jNo = 0; PEXT2_MCB jcb = NULL; struct block_device * bd = &Vcb->bd; #ifndef __REACTOS__ struct super_block * sb = &Vcb->sb; #endif struct inode * ji = NULL; journal_t * journal = NULL; struct ext3_super_block *esb; /* check journal inode number */ if (!Ext2CheckJournal(Vcb, &jNo)) { return -1; } /* allocate journal Mcb */ jcb = Ext2LoadInternalJournal(Vcb, jNo); if (!jcb) { rc = -6; goto errorout; } /* allocate journal inode */ ji = &jcb->Inode; /* initialize journal file from inode */ journal = journal_init_inode(ji); /* initialzation succeeds ? */ if (!journal) { iput(ji); rc = -8; goto errorout; } /* start journal recovery */ rc = journal_load(journal); if (0 != rc) { rc = -9; DbgPrint("Ext2Fsd: recover_journal: failed " "to recover journal data.\n"); } /* reload super_block and group_description */ Ext2RefreshSuper(IrpContext, Vcb); Ext2RefreshGroup(IrpContext, Vcb); /* wipe journal data and clear recover flag in sb */ if (rc == 0) { journal_wipe_recovery(journal); ClearLongFlag( Vcb->SuperBlock->s_feature_incompat, EXT3_FEATURE_INCOMPAT_RECOVER ); Ext2SaveSuper(IrpContext, Vcb); sync_blockdev(bd); ClearLongFlag(Vcb->Flags, VCB_JOURNAL_RECOVER); } errorout: /* destroy journal structure */ if (journal) { journal_destroy(journal); } /* destory journal Mcb */ if (jcb) { Ext2FreeMcb(Vcb, jcb); } return rc; }
NTSTATUS Ext2ShutDown (IN PEXT2_IRP_CONTEXT IrpContext) { NTSTATUS Status; PIRP Irp; PIO_STACK_LOCATION IrpSp; PEXT2_VCB Vcb; PLIST_ENTRY ListEntry; BOOLEAN GlobalResourceAcquired = FALSE; __try { Status = STATUS_SUCCESS; ASSERT(IrpContext); ASSERT((IrpContext->Identifier.Type == EXT2ICX) && (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT))); Irp = IrpContext->Irp; IrpSp = IoGetCurrentIrpStackLocation(Irp); if (!ExAcquireResourceExclusiveLite( &Ext2Global->Resource, IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) )) { Status = STATUS_PENDING; __leave; } GlobalResourceAcquired = TRUE; for (ListEntry = Ext2Global->VcbList.Flink; ListEntry != &(Ext2Global->VcbList); ListEntry = ListEntry->Flink ) { Vcb = CONTAINING_RECORD(ListEntry, EXT2_VCB, Next); if (ExAcquireResourceExclusiveLite( &Vcb->MainResource, TRUE )) { if (IsMounted(Vcb)) { /* update mount count */ Vcb->SuperBlock->s_mnt_count++; if (Vcb->SuperBlock->s_mnt_count > Vcb->SuperBlock->s_max_mnt_count ) { Vcb->SuperBlock->s_mnt_count = Vcb->SuperBlock->s_max_mnt_count; } Ext2SaveSuper(IrpContext, Vcb); /* flush dirty cache for all files */ Status = Ext2FlushFiles(IrpContext, Vcb, TRUE); if (!NT_SUCCESS(Status)) { DbgBreak(); } /* flush volume stream's cache to disk */ Status = Ext2FlushVolume(IrpContext, Vcb, TRUE); if (!NT_SUCCESS(Status) && Status != STATUS_MEDIA_WRITE_PROTECTED) { DbgBreak(); } /* send shutdown request to underlying disk */ Ext2DiskShutDown(Vcb); } ExReleaseResourceLite(&Vcb->MainResource); } } /* IoUnregisterFileSystem(Ext2Global->DiskdevObject); IoUnregisterFileSystem(Ext2Global->CdromdevObject); */ } __finally { if (GlobalResourceAcquired) { ExReleaseResourceLite(&Ext2Global->Resource); } if (!IrpContext->ExceptionInProgress) { if (Status == STATUS_PENDING) { Ext2QueueRequest(IrpContext); } else { Ext2CompleteIrpContext(IrpContext, Status); } } } return Status; }
NTSTATUS Ext2WriteFile(IN PEXT2_IRP_CONTEXT IrpContext) { PEXT2_VCB Vcb = NULL; PEXT2_FCB Fcb = NULL; PEXT2_CCB Ccb = NULL; PFILE_OBJECT FileObject = NULL; PDEVICE_OBJECT DeviceObject = NULL; PIRP Irp = NULL; PIO_STACK_LOCATION IoStackLocation = NULL; PUCHAR Buffer = NULL; LARGE_INTEGER ByteOffset; ULONG ReturnedLength = 0; ULONG Length; NTSTATUS Status = STATUS_UNSUCCESSFUL; BOOLEAN OpPostIrp = FALSE; BOOLEAN PagingIo = FALSE; BOOLEAN Nocache = FALSE; BOOLEAN SynchronousIo = FALSE; BOOLEAN RecursiveWriteThrough = FALSE; BOOLEAN MainResourceAcquired = FALSE; BOOLEAN PagingIoResourceAcquired = FALSE; BOOLEAN bDeferred = FALSE; BOOLEAN UpdateFileValidSize = FALSE; BOOLEAN FileSizesChanged = FALSE; BOOLEAN rc; __try { ASSERT(IrpContext); ASSERT((IrpContext->Identifier.Type == EXT2ICX) && (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT))); DeviceObject = IrpContext->DeviceObject; Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension; ASSERT(Vcb != NULL); ASSERT((Vcb->Identifier.Type == EXT2VCB) && (Vcb->Identifier.Size == sizeof(EXT2_VCB))); FileObject = IrpContext->FileObject; Fcb = (PEXT2_FCB) FileObject->FsContext; Ccb = (PEXT2_CCB) FileObject->FsContext2; ASSERT(Fcb); ASSERT((Fcb->Identifier.Type == EXT2FCB) && (Fcb->Identifier.Size == sizeof(EXT2_FCB))); Irp = IrpContext->Irp; IoStackLocation = IoGetCurrentIrpStackLocation(Irp); Length = IoStackLocation->Parameters.Write.Length; ByteOffset = IoStackLocation->Parameters.Write.ByteOffset; PagingIo = IsFlagOn(Irp->Flags, IRP_PAGING_IO); Nocache = IsFlagOn(Irp->Flags, IRP_NOCACHE); SynchronousIo = IsFlagOn(FileObject->Flags, FO_SYNCHRONOUS_IO); if (PagingIo) { ASSERT(Nocache); } DEBUG(DL_INF, ("Ext2WriteFile: %wZ Offset=%I64xh Length=%xh Paging=%xh Nocache=%xh\n", &Fcb->Mcb->ShortName, ByteOffset.QuadPart, Length, PagingIo, Nocache)); if (IsSpecialFile(Fcb) || IsInodeSymLink(Fcb->Inode) ) { Status = STATUS_INVALID_DEVICE_REQUEST; __leave; } if (IsFileDeleted(Fcb->Mcb) || (IsSymLink(Fcb) && IsFileDeleted(Fcb->Mcb->Target)) ) { Status = STATUS_FILE_DELETED; __leave; } if (Length == 0) { Irp->IoStatus.Information = 0; Status = STATUS_SUCCESS; __leave; } if (ByteOffset.LowPart == FILE_USE_FILE_POINTER_POSITION && ByteOffset.HighPart == -1) { ByteOffset = FileObject->CurrentByteOffset; } else if (IsWritingToEof(ByteOffset)) { ByteOffset.QuadPart = Fcb->Header.FileSize.QuadPart; } if (Nocache && !PagingIo && ( (ByteOffset.LowPart & (SECTOR_SIZE - 1)) || (Length & (SECTOR_SIZE - 1))) ) { Status = STATUS_INVALID_PARAMETER; __leave; } if (FlagOn(IrpContext->MinorFunction, IRP_MN_DPC)) { ClearFlag(IrpContext->MinorFunction, IRP_MN_DPC); Status = STATUS_PENDING; __leave; } if (!Nocache) { BOOLEAN bAgain = IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_DEFERRED); BOOLEAN bWait = IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT); BOOLEAN bQueue = IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_REQUEUED); if ( !CcCanIWrite( FileObject, Length, (bWait && bQueue), bAgain ) ) { Status = Ext2LockUserBuffer( IrpContext->Irp, Length, IoReadAccess); if (NT_SUCCESS(Status)) { SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_DEFERRED); CcDeferWrite( FileObject, (PCC_POST_DEFERRED_WRITE)Ext2DeferWrite, IrpContext, Irp, Length, bAgain ); bDeferred = TRUE; Status = STATUS_PENDING; __leave; } } } if (IsDirectory(Fcb) && !PagingIo) { Status = STATUS_INVALID_DEVICE_REQUEST; __leave; } if (IsFlagOn(Irp->Flags, IRP_SYNCHRONOUS_PAGING_IO) && !IrpContext->IsTopLevel) { PIRP TopIrp; TopIrp = IoGetTopLevelIrp(); if ( (ULONG_PTR)TopIrp > FSRTL_MAX_TOP_LEVEL_IRP_FLAG && NodeType(TopIrp) == IO_TYPE_IRP) { PIO_STACK_LOCATION IrpStack; IrpStack = IoGetCurrentIrpStackLocation(TopIrp); if ((IrpStack->MajorFunction == IRP_MJ_WRITE) && (IrpStack->FileObject->FsContext == FileObject->FsContext) && !FlagOn(TopIrp->Flags, IRP_NOCACHE) ) { SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WRITE_THROUGH); RecursiveWriteThrough = TRUE; } } } if (PagingIo) { if (!ExAcquireResourceSharedLite(&Fcb->PagingIoResource, TRUE)) { Status = STATUS_PENDING; __leave; } PagingIoResourceAcquired = TRUE; if ( (ByteOffset.QuadPart + Length) > Fcb->Header.FileSize.QuadPart) { if (ByteOffset.QuadPart >= Fcb->Header.AllocationSize.QuadPart) { Status = STATUS_SUCCESS; Irp->IoStatus.Information = 0; __leave; } else { ReturnedLength = (ULONG)(Fcb->Header.FileSize.QuadPart - ByteOffset.QuadPart); if (ByteOffset.QuadPart + Length > Fcb->Header.AllocationSize.QuadPart) Length = (ULONG)(Fcb->Header.AllocationSize.QuadPart - ByteOffset.QuadPart); } } else { ReturnedLength = Length; } } else { if (!Ext2CheckFileAccess(Vcb, Fcb->Mcb, Ext2FileCanWrite)) { Status = STATUS_ACCESS_DENIED; __leave; } if (IsDirectory(Fcb)) { __leave; } if (!ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE)) { Status = STATUS_PENDING; __leave; } MainResourceAcquired = TRUE; // // Do flushing for such cases // if (Nocache && Ccb != NULL && Fcb->SectionObject.DataSectionObject != NULL) { ExAcquireSharedStarveExclusive( &Fcb->PagingIoResource, TRUE); ExReleaseResourceLite(&Fcb->PagingIoResource); CcFlushCache( &(Fcb->SectionObject), &ByteOffset, CEILING_ALIGNED(ULONG, Length, BLOCK_SIZE), &(Irp->IoStatus)); ClearLongFlag(Fcb->Flags, FCB_FILE_MODIFIED); if (!NT_SUCCESS(Irp->IoStatus.Status)) { Status = Irp->IoStatus.Status; __leave; } ExAcquireSharedStarveExclusive( &Fcb->PagingIoResource, TRUE); ExReleaseResourceLite(&Fcb->PagingIoResource); CcPurgeCacheSection( &(Fcb->SectionObject), &(ByteOffset), CEILING_ALIGNED(ULONG, Length, BLOCK_SIZE), FALSE ); } if (!FsRtlCheckLockForWriteAccess(&Fcb->FileLockAnchor, Irp)) { Status = STATUS_FILE_LOCK_CONFLICT; __leave; } if (Ccb != NULL) { Status = FsRtlCheckOplock( &Fcb->Oplock, Irp, IrpContext, Ext2OplockComplete, Ext2LockIrp ); if (Status != STATUS_SUCCESS) { OpPostIrp = TRUE; __leave; } // // Set the flag indicating if Fast I/O is possible // Fcb->Header.IsFastIoPossible = Ext2IsFastIoPossible(Fcb); } // // Extend the inode size when the i/o is beyond the file end ? // if ((ByteOffset.QuadPart + Length) > Fcb->Header.FileSize.QuadPart) { LARGE_INTEGER AllocationSize, Last; if (!ExAcquireResourceExclusiveLite(&Fcb->PagingIoResource, TRUE)) { Status = STATUS_PENDING; __leave; } PagingIoResourceAcquired = TRUE; /* let this irp wait, since it has to be synchronous */ SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT); Last.QuadPart = Fcb->Header.AllocationSize.QuadPart; AllocationSize.QuadPart = (LONGLONG)(ByteOffset.QuadPart + Length); AllocationSize.QuadPart = CEILING_ALIGNED(ULONGLONG, (ULONGLONG)AllocationSize.QuadPart, (ULONGLONG)BLOCK_SIZE); /* tell Ext2ExpandFile to allocate unwritten extent or NULL blocks for indirect files, otherwise we might get gabage data in holes */ IrpContext->MajorFunction += IRP_MJ_MAXIMUM_FUNCTION; Status = Ext2ExpandFile(IrpContext, Vcb, Fcb->Mcb, &AllocationSize); IrpContext->MajorFunction -= IRP_MJ_MAXIMUM_FUNCTION; if (AllocationSize.QuadPart > Last.QuadPart) { Fcb->Header.AllocationSize.QuadPart = AllocationSize.QuadPart; SetLongFlag(Fcb->Flags, FCB_ALLOC_IN_WRITE); } ExReleaseResourceLite(&Fcb->PagingIoResource); PagingIoResourceAcquired = FALSE; if (ByteOffset.QuadPart >= Fcb->Header.AllocationSize.QuadPart) { if (NT_SUCCESS(Status)) { DbgBreak(); Status = STATUS_UNSUCCESSFUL; } __leave; } if (ByteOffset.QuadPart + Length > Fcb->Header.AllocationSize.QuadPart) { Length = (ULONG)(Fcb->Header.AllocationSize.QuadPart - ByteOffset.QuadPart); } Fcb->Header.FileSize.QuadPart = Fcb->Inode->i_size = ByteOffset.QuadPart + Length; Ext2SaveInode(IrpContext, Vcb, Fcb->Inode); if (CcIsFileCached(FileObject)) { CcSetFileSizes(FileObject, (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize))); } FileObject->Flags |= FO_FILE_SIZE_CHANGED | FO_FILE_MODIFIED; FileSizesChanged = TRUE; 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); } DEBUG(DL_IO, ("Ext2WriteFile: expanding %wZ to FS: %I64xh FA: %I64xh\n", &Fcb->Mcb->ShortName, Fcb->Header.FileSize.QuadPart, Fcb->Header.AllocationSize.QuadPart)); } ReturnedLength = Length; } if (!Nocache) { if (FileObject->PrivateCacheMap == NULL) { CcInitializeCacheMap( FileObject, (PCC_FILE_SIZES)(&Fcb->Header.AllocationSize), FALSE, &Ext2Global->CacheManagerCallbacks, Fcb ); CcSetReadAheadGranularity( FileObject, READ_AHEAD_GRANULARITY ); } if (FlagOn(IrpContext->MinorFunction, IRP_MN_MDL)) { CcPrepareMdlWrite( FileObject, &ByteOffset, Length, &Irp->MdlAddress, &Irp->IoStatus ); Status = Irp->IoStatus.Status; } else { Buffer = Ext2GetUserBuffer(Irp); if (Buffer == NULL) { DbgBreak(); Status = STATUS_INVALID_USER_BUFFER; __leave; } if (ByteOffset.QuadPart > Fcb->Header.ValidDataLength.QuadPart) { /* let this irp wait, since it has to be synchronous */ SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT); rc = Ext2ZeroData(IrpContext, Vcb, FileObject, &Fcb->Header.ValidDataLength, &ByteOffset); if (!rc) { Status = STATUS_PENDING; DbgBreak(); __leave; } } if (!CcCopyWrite(FileObject, &ByteOffset, Length, Ext2CanIWait(), Buffer)) { if (Ext2CanIWait() || !CcCopyWrite(FileObject, &ByteOffset, Length, TRUE, Buffer)) { Status = STATUS_PENDING; DbgBreak(); __leave; } } if (ByteOffset.QuadPart + Length > Fcb->Header.ValidDataLength.QuadPart ) { if (Fcb->Header.FileSize.QuadPart < ByteOffset.QuadPart + Length) { Fcb->Header.ValidDataLength.QuadPart = Fcb->Header.FileSize.QuadPart; } else { if (Fcb->Header.ValidDataLength.QuadPart < ByteOffset.QuadPart + Length) Fcb->Header.ValidDataLength.QuadPart = ByteOffset.QuadPart + Length; } CcSetFileSizes(FileObject, (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize))); FileSizesChanged = TRUE; } Status = STATUS_SUCCESS; } if (NT_SUCCESS(Status)) { Irp->IoStatus.Information = Length; if (IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK)) { DEBUG(DL_FLP, ("Ext2WriteFile is starting FlushingDpc...\n")); Ext2StartFloppyFlushDpc(Vcb, Fcb, FileObject); } } } else { if (!PagingIo && !RecursiveWriteThrough && !IsLazyWriter(Fcb)) { if (ByteOffset.QuadPart > Fcb->Header.ValidDataLength.QuadPart) { /* let this irp wait, since it has to be synchronous */ SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT); rc = Ext2ZeroData(IrpContext, Vcb, FileObject, &Fcb->Header.ValidDataLength, &ByteOffset); if (!rc) { Status = STATUS_PENDING; DbgBreak(); __leave; } } } Status = Ext2LockUserBuffer( IrpContext->Irp, Length, IoReadAccess ); if (!NT_SUCCESS(Status)) { __leave; } Irp->IoStatus.Status = STATUS_SUCCESS; Irp->IoStatus.Information = ReturnedLength; Status = Ext2WriteInode( IrpContext, Vcb, Fcb->Mcb, (ULONGLONG)(ByteOffset.QuadPart), NULL, ReturnedLength, TRUE, &Length ); Irp = IrpContext->Irp; if (NT_SUCCESS(Status) && !RecursiveWriteThrough && !IsLazyWriter(Fcb)) { if (ByteOffset.QuadPart + Length > Fcb->Header.ValidDataLength.QuadPart ) { FileSizesChanged = TRUE; if (Fcb->Header.FileSize.QuadPart < ByteOffset.QuadPart + Length) { if (!PagingIo) Fcb->Header.FileSize.QuadPart = ByteOffset.QuadPart + Length; Fcb->Header.ValidDataLength.QuadPart = Fcb->Header.FileSize.QuadPart; } else { if (Fcb->Header.ValidDataLength.QuadPart < ByteOffset.QuadPart + Length) Fcb->Header.ValidDataLength.QuadPart = ByteOffset.QuadPart + Length; } if (!PagingIo && CcIsFileCached(FileObject)) { CcSetFileSizes(FileObject, (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize))); } DEBUG(DL_IO, ("Ext2WriteFile: %wZ written FS: %I64xh FA: %I64xh BO: %I64xh LEN: %u\n", &Fcb->Mcb->ShortName, Fcb->Header.FileSize.QuadPart, Fcb->Header.AllocationSize.QuadPart, ByteOffset.QuadPart, Length)); } } } if (FileSizesChanged) { FileObject->Flags |= FO_FILE_SIZE_CHANGED | FO_FILE_MODIFIED; Ext2NotifyReportChange( IrpContext, Vcb, Fcb->Mcb, FILE_NOTIFY_CHANGE_SIZE, FILE_ACTION_MODIFIED ); } } __finally { /* * in case we got excpetions, we need revert MajorFunction * back to IRP_MJ_WRITE. The reason we do this, is to tell * Ext2ExpandFile to allocate unwritten extent or don't add * new blocks for indirect files. */ if (IrpContext->MajorFunction > IRP_MJ_MAXIMUM_FUNCTION) IrpContext->MajorFunction -= IRP_MJ_MAXIMUM_FUNCTION; if (Irp) { if (PagingIoResourceAcquired) { ExReleaseResourceLite(&Fcb->PagingIoResource); } if (MainResourceAcquired) { ExReleaseResourceLite(&Fcb->MainResource); } } if (!OpPostIrp && !IrpContext->ExceptionInProgress) { if (Irp) { if (Status == STATUS_PENDING || Status == STATUS_CANT_WAIT ) { if (!bDeferred) { Status = Ext2QueueRequest(IrpContext); } } else { if (NT_SUCCESS(Status) && !PagingIo) { if (SynchronousIo) { FileObject->CurrentByteOffset.QuadPart = ByteOffset.QuadPart + Irp->IoStatus.Information; } SetFlag(FileObject->Flags, FO_FILE_MODIFIED); SetLongFlag(Fcb->Flags, FCB_FILE_MODIFIED); } Ext2CompleteIrpContext(IrpContext, Status); } } else { Ext2FreeIrpContext(IrpContext); } } } DEBUG(DL_IO, ("Ext2WriteFile: %wZ written at Offset=%I64xh Length=%xh PagingIo=%d Nocache=%d " "RetLen=%xh VDL=%I64xh FileSize=%I64xh i_size=%I64xh Status=%xh\n", &Fcb->Mcb->ShortName, ByteOffset, Length, PagingIo, Nocache, ReturnedLength, Fcb->Header.ValidDataLength.QuadPart,Fcb->Header.FileSize.QuadPart, Fcb->Inode->i_size, Status)); return Status; }
NTSTATUS Ext2SetVolumeInformation (IN PEXT2_IRP_CONTEXT IrpContext) { PDEVICE_OBJECT DeviceObject; NTSTATUS Status = STATUS_UNSUCCESSFUL; PEXT2_VCB Vcb; PIRP Irp; PIO_STACK_LOCATION IoStackLocation; FS_INFORMATION_CLASS FsInformationClass; BOOLEAN VcbResourceAcquired = FALSE; __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; __leave; } Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension; ASSERT(Vcb != NULL); ASSERT((Vcb->Identifier.Type == EXT2VCB) && (Vcb->Identifier.Size == sizeof(EXT2_VCB))); ASSERT(IsMounted(Vcb)); if (IsFlagOn(Vcb->Flags, VCB_READ_ONLY)) { Status = STATUS_MEDIA_WRITE_PROTECTED; __leave; } if (!ExAcquireResourceExclusiveLite( &Vcb->MainResource, TRUE)) { Status = STATUS_PENDING; __leave; } VcbResourceAcquired = TRUE; Ext2VerifyVcb(IrpContext, Vcb); Irp = IrpContext->Irp; IoStackLocation = IoGetCurrentIrpStackLocation(Irp); //Notes: SetVolume is not defined in ntddk.h of win2k ddk, // But it's same to QueryVolume .... FsInformationClass = IoStackLocation->Parameters./*SetVolume*/QueryVolume.FsInformationClass; switch (FsInformationClass) { case FileFsLabelInformation: { PFILE_FS_LABEL_INFORMATION VolLabelInfo = NULL; ULONG VolLabelLen; UNICODE_STRING LabelName ; OEM_STRING OemName; VolLabelInfo = (PFILE_FS_LABEL_INFORMATION) Irp->AssociatedIrp.SystemBuffer; VolLabelLen = VolLabelInfo->VolumeLabelLength; if (VolLabelLen > (16 * sizeof(WCHAR))) { Status = STATUS_INVALID_VOLUME_LABEL; __leave; } RtlCopyMemory( Vcb->Vpb->VolumeLabel, VolLabelInfo->VolumeLabel, VolLabelLen ); RtlZeroMemory(Vcb->SuperBlock->s_volume_name, 16); LabelName.Buffer = VolLabelInfo->VolumeLabel; LabelName.MaximumLength = (USHORT)16 * sizeof(WCHAR); LabelName.Length = (USHORT)VolLabelLen; OemName.Buffer = SUPER_BLOCK->s_volume_name; OemName.Length = 0; OemName.MaximumLength = 16; Ext2UnicodeToOEM(Vcb, &OemName, &LabelName); Vcb->Vpb->VolumeLabelLength = (USHORT) VolLabelLen; if (Ext2SaveSuper(IrpContext, Vcb)) { Status = STATUS_SUCCESS; } Irp->IoStatus.Information = 0; } break; default: Status = STATUS_INVALID_INFO_CLASS; } } __finally { if (VcbResourceAcquired) { ExReleaseResourceLite(&Vcb->MainResource); } if (!IrpContext->ExceptionInProgress) { if (Status == STATUS_PENDING) { Ext2QueueRequest(IrpContext); } else { Ext2CompleteIrpContext(IrpContext, Status); } } } return Status; }