mirror of
https://github.com/reactos/reactos.git
synced 2024-06-01 02:01:57 +00:00
3491 lines
96 KiB
C
3491 lines
96 KiB
C
/*
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* COPYRIGHT: See COPYRIGHT.TXT
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* PROJECT: Ext2 File System Driver for WinNT/2K/XP
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* FILE: memory.c
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* PROGRAMMER: Matt Wu <mattwu@163.com>
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* HOMEPAGE: http://www.ext2fsd.com
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* UPDATE HISTORY:
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*/
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/* INCLUDES *****************************************************************/
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#include "ext2fs.h"
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/* GLOBALS ***************************************************************/
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extern PEXT2_GLOBAL Ext2Global;
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/* DEFINITIONS *************************************************************/
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, Ext2AllocateInode)
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#pragma alloc_text(PAGE, Ext2DestroyInode)
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#pragma alloc_text(PAGE, Ext2CheckBitmapConsistency)
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#pragma alloc_text(PAGE, Ext2CheckSetBlock)
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#pragma alloc_text(PAGE, Ext2InitializeVcb)
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#pragma alloc_text(PAGE, Ext2TearDownStream)
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#pragma alloc_text(PAGE, Ext2DestroyVcb)
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#pragma alloc_text(PAGE, Ext2SyncUninitializeCacheMap)
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#pragma alloc_text(PAGE, Ext2ReaperThread)
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#pragma alloc_text(PAGE, Ext2StartReaper)
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#pragma alloc_text(PAGE, Ext2StopReaper)
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#endif
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PEXT2_IRP_CONTEXT
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Ext2AllocateIrpContext (IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp )
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{
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PIO_STACK_LOCATION irpSp;
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PEXT2_IRP_CONTEXT IrpContext;
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ASSERT(DeviceObject != NULL);
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ASSERT(Irp != NULL);
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irpSp = IoGetCurrentIrpStackLocation(Irp);
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IrpContext = (PEXT2_IRP_CONTEXT) (
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ExAllocateFromNPagedLookasideList(
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&(Ext2Global->Ext2IrpContextLookasideList)));
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if (IrpContext == NULL) {
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return NULL;
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}
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RtlZeroMemory(IrpContext, sizeof(EXT2_IRP_CONTEXT) );
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IrpContext->Identifier.Type = EXT2ICX;
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IrpContext->Identifier.Size = sizeof(EXT2_IRP_CONTEXT);
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IrpContext->Irp = Irp;
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IrpContext->MajorFunction = irpSp->MajorFunction;
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IrpContext->MinorFunction = irpSp->MinorFunction;
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IrpContext->DeviceObject = DeviceObject;
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IrpContext->FileObject = irpSp->FileObject;
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if (NULL != IrpContext->FileObject) {
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IrpContext->Fcb = (PEXT2_FCB)IrpContext->FileObject->FsContext;
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IrpContext->Ccb = (PEXT2_CCB)IrpContext->FileObject->FsContext2;
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}
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if (IrpContext->FileObject != NULL) {
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IrpContext->RealDevice = IrpContext->FileObject->DeviceObject;
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} else if (IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL) {
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if (irpSp->Parameters.MountVolume.Vpb) {
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IrpContext->RealDevice = irpSp->Parameters.MountVolume.Vpb->RealDevice;
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}
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}
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if (IsFlagOn(irpSp->Flags, SL_WRITE_THROUGH)) {
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SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WRITE_THROUGH);
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}
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if (IsFlagOn(irpSp->Flags, SL_OVERRIDE_VERIFY_VOLUME)) {
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SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_VERIFY_READ);
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}
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if (IrpContext->MajorFunction == IRP_MJ_CLEANUP ||
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IrpContext->MajorFunction == IRP_MJ_CLOSE ||
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IrpContext->MajorFunction == IRP_MJ_SHUTDOWN ||
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IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL ||
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IrpContext->MajorFunction == IRP_MJ_PNP ) {
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if (IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL ||
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IrpContext->MajorFunction == IRP_MJ_PNP) {
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if (IoGetCurrentIrpStackLocation(Irp)->FileObject == NULL ||
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IoIsOperationSynchronous(Irp)) {
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SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
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}
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} else {
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SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
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}
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} else if (IoIsOperationSynchronous(Irp)) {
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SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
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}
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IrpContext->IsTopLevel = (IoGetTopLevelIrp() == Irp);
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IrpContext->ExceptionInProgress = FALSE;
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INC_IRP_COUNT(IrpContext);
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return IrpContext;
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}
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VOID
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Ext2FreeIrpContext (IN PEXT2_IRP_CONTEXT IrpContext)
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{
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ASSERT(IrpContext != NULL);
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ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
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(IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
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/* free the IrpContext to NonPagedList */
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IrpContext->Identifier.Type = 0;
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IrpContext->Identifier.Size = 0;
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DEC_IRP_COUNT(IrpContext);
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ExFreeToNPagedLookasideList(&(Ext2Global->Ext2IrpContextLookasideList), IrpContext);
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}
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PEXT2_FCB
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Ext2AllocateFcb (
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IN PEXT2_VCB Vcb,
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IN PEXT2_MCB Mcb
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)
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{
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PEXT2_FCB Fcb;
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ASSERT(ExIsResourceAcquiredExclusiveLite(&Vcb->FcbLock));
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Fcb = (PEXT2_FCB) ExAllocateFromNPagedLookasideList(
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&(Ext2Global->Ext2FcbLookasideList));
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if (!Fcb) {
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return NULL;
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}
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RtlZeroMemory(Fcb, sizeof(EXT2_FCB));
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Fcb->Identifier.Type = EXT2FCB;
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Fcb->Identifier.Size = sizeof(EXT2_FCB);
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#ifndef _WIN2K_TARGET_
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ExInitializeFastMutex(&Fcb->Mutex);
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FsRtlSetupAdvancedHeader(&Fcb->Header, &Fcb->Mutex);
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#endif
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FsRtlInitializeOplock(&Fcb->Oplock);
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FsRtlInitializeFileLock (
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&Fcb->FileLockAnchor,
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NULL,
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NULL );
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Fcb->OpenHandleCount = 0;
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Fcb->ReferenceCount = 0;
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Fcb->Vcb = Vcb;
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Fcb->Inode = &Mcb->Inode;
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ASSERT(Mcb->Fcb == NULL);
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Ext2ReferMcb(Mcb);
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Fcb->Mcb = Mcb;
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Mcb->Fcb = Fcb;
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DEBUG(DL_RES, ("Ext2AllocateFcb: Fcb %p created: %wZ.\n",
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Fcb, &Fcb->Mcb->FullName));
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RtlZeroMemory(&Fcb->Header, sizeof(FSRTL_COMMON_FCB_HEADER));
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Fcb->Header.NodeTypeCode = (USHORT) EXT2FCB;
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Fcb->Header.NodeByteSize = sizeof(EXT2_FCB);
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Fcb->Header.IsFastIoPossible = FastIoIsNotPossible;
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Fcb->Header.Resource = &(Fcb->MainResource);
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Fcb->Header.PagingIoResource = &(Fcb->PagingIoResource);
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Fcb->Header.FileSize.QuadPart = Mcb->Inode.i_size;
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Fcb->Header.ValidDataLength.QuadPart = Mcb->Inode.i_size;
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Fcb->Header.AllocationSize.QuadPart = CEILING_ALIGNED(ULONGLONG,
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Fcb->Header.FileSize.QuadPart, (ULONGLONG)Vcb->BlockSize);
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Fcb->SectionObject.DataSectionObject = NULL;
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Fcb->SectionObject.SharedCacheMap = NULL;
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Fcb->SectionObject.ImageSectionObject = NULL;
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ExInitializeResourceLite(&(Fcb->MainResource));
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ExInitializeResourceLite(&(Fcb->PagingIoResource));
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Ext2InsertFcb(Vcb, Fcb);
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INC_MEM_COUNT(PS_FCB, Fcb, sizeof(EXT2_FCB));
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return Fcb;
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}
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VOID
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Ext2UnlinkFcb(IN PEXT2_FCB Fcb)
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{
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PEXT2_VCB Vcb = Fcb->Vcb;
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PEXT2_MCB Mcb;
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ExAcquireResourceExclusiveLite(&Vcb->McbLock, TRUE);
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Mcb = Fcb->Mcb;
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DEBUG(DL_ERR, ("Ext2FreeFcb: Fcb (%p) to be unlinked: %wZ.\n",
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Fcb, Mcb ? &Mcb->FullName : NULL));
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if ((Mcb != NULL) &&
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(Mcb->Identifier.Type == EXT2MCB) &&
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(Mcb->Identifier.Size == sizeof(EXT2_MCB))) {
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ASSERT (Mcb->Fcb == Fcb);
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if (IsMcbSpecialFile(Mcb) ||
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IsFileDeleted(Mcb)) {
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ASSERT(!IsRoot(Fcb));
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Ext2RemoveMcb(Vcb, Mcb);
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Mcb->Fcb = NULL;
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Ext2UnlinkMcb(Vcb, Mcb);
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Ext2DerefMcb(Mcb);
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Ext2LinkHeadMcb(Vcb, Mcb);
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} else {
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Mcb->Fcb = NULL;
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Ext2DerefMcb(Mcb);
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}
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Fcb->Mcb = NULL;
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}
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ExReleaseResourceLite(&Vcb->McbLock);
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}
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VOID
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Ext2FreeFcb (IN PEXT2_FCB Fcb)
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{
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PEXT2_VCB Vcb = Fcb->Vcb;
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_SEH2_TRY {
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ASSERT((Fcb != NULL) && (Fcb->Identifier.Type == EXT2FCB) &&
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(Fcb->Identifier.Size == sizeof(EXT2_FCB)));
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ASSERT(0 == Fcb->ReferenceCount);
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#ifndef _WIN2K_TARGET_
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FsRtlTeardownPerStreamContexts(&Fcb->Header);
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#endif
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FsRtlUninitializeFileLock(&Fcb->FileLockAnchor);
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FsRtlUninitializeOplock(&Fcb->Oplock);
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ExDeleteResourceLite(&Fcb->MainResource);
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ExDeleteResourceLite(&Fcb->PagingIoResource);
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Fcb->Identifier.Type = 0;
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Fcb->Identifier.Size = 0;
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ExFreeToNPagedLookasideList(&(Ext2Global->Ext2FcbLookasideList), Fcb);
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DEC_MEM_COUNT(PS_FCB, Fcb, sizeof(EXT2_FCB));
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if (0 == Ext2DerefXcb(&Vcb->ReferenceCount)) {
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if (!IsMounted(Vcb) || IsDispending(Vcb)) {
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Ext2CheckDismount(NULL, Vcb, FALSE);
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}
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}
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} _SEH2_FINALLY {
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} _SEH2_END;
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}
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VOID
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Ext2ReleaseFcb (IN PEXT2_FCB Fcb)
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{
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PEXT2_VCB Vcb = Fcb->Vcb;
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PEXT2_MCB Mcb;
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if (0 != Ext2DerefXcb(&Fcb->ReferenceCount))
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return;
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ExAcquireResourceExclusiveLite(&Vcb->FcbLock, TRUE);
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ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE);
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Mcb = Fcb->Mcb;
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RemoveEntryList(&Fcb->Next);
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if (IsFlagOn(Fcb->Flags, FCB_DELETE_PENDING) ||
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NULL == Mcb || IsFileDeleted(Mcb)) {
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InsertHeadList(&Vcb->FcbList, &Fcb->Next);
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Fcb->TsDrop.QuadPart = 0;
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} else {
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InsertTailList(&Vcb->FcbList, &Fcb->Next);
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KeQuerySystemTime(&Fcb->TsDrop);
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}
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ExReleaseResourceLite(&Fcb->MainResource);
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ExReleaseResourceLite(&Vcb->FcbLock);
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if ((Vcb->FcbCount >> 6) > (ULONG)(Ext2Global->MaxDepth)) {
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KeSetEvent(&Ext2Global->FcbReaper.Wait, 0, FALSE);
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}
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}
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/* Insert Fcb to Vcb->FcbList queue, with Vcb->FcbLock Acquired. */
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VOID
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Ext2InsertFcb(PEXT2_VCB Vcb, PEXT2_FCB Fcb)
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{
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ASSERT(ExIsResourceAcquiredExclusiveLite(&Vcb->FcbLock));
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KeQuerySystemTime(&Fcb->TsDrop);
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Ext2ReferXcb(&Vcb->FcbCount);
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Ext2ReferXcb(&Vcb->ReferenceCount);
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InsertTailList(&Vcb->FcbList, &Fcb->Next);
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}
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PEXT2_CCB
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Ext2AllocateCcb (ULONG Flags, PEXT2_MCB SymLink)
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{
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PEXT2_CCB Ccb;
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Ccb = (PEXT2_CCB) (ExAllocateFromNPagedLookasideList(
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&(Ext2Global->Ext2CcbLookasideList)));
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if (!Ccb) {
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return NULL;
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}
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DEBUG(DL_RES, ( "ExtAllocateCcb: Ccb created: %ph.\n", Ccb));
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RtlZeroMemory(Ccb, sizeof(EXT2_CCB));
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Ccb->Identifier.Type = EXT2CCB;
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Ccb->Identifier.Size = sizeof(EXT2_CCB);
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Ccb->Flags = Flags;
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Ccb->SymLink = SymLink;
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if (SymLink) {
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ASSERT(SymLink->Refercount > 0);
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Ext2ReferMcb(SymLink);
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DEBUG(DL_INF, ( "ExtAllocateCcb: Ccb SymLink: %wZ.\n",
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&Ccb->SymLink->FullName));
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}
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Ccb->DirectorySearchPattern.Length = 0;
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Ccb->DirectorySearchPattern.MaximumLength = 0;
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Ccb->DirectorySearchPattern.Buffer = 0;
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INC_MEM_COUNT(PS_CCB, Ccb, sizeof(EXT2_CCB));
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return Ccb;
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}
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VOID
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Ext2FreeCcb (IN PEXT2_VCB Vcb, IN PEXT2_CCB Ccb)
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{
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ASSERT(Ccb != NULL);
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ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
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(Ccb->Identifier.Size == sizeof(EXT2_CCB)));
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DEBUG(DL_RES, ( "Ext2FreeCcb: Ccb = %ph.\n", Ccb));
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if (Ccb->SymLink) {
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DEBUG(DL_INF, ( "Ext2FreeCcb: Ccb SymLink: %wZ.\n",
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&Ccb->SymLink->FullName));
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if (IsFileDeleted(Ccb->SymLink->Target)) {
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Ext2UnlinkMcb(Vcb, Ccb->SymLink);
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Ext2DerefMcb(Ccb->SymLink);
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Ext2LinkHeadMcb(Vcb, Ccb->SymLink);
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} else {
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Ext2DerefMcb(Ccb->SymLink);
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}
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}
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if (Ccb->DirectorySearchPattern.Buffer != NULL) {
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DEC_MEM_COUNT(PS_DIR_PATTERN, Ccb->DirectorySearchPattern.Buffer,
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Ccb->DirectorySearchPattern.MaximumLength );
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Ext2FreePool(Ccb->DirectorySearchPattern.Buffer, EXT2_DIRSP_MAGIC);
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}
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ExFreeToNPagedLookasideList(&(Ext2Global->Ext2CcbLookasideList), Ccb);
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DEC_MEM_COUNT(PS_CCB, Ccb, sizeof(EXT2_CCB));
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}
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PEXT2_INODE
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Ext2AllocateInode (PEXT2_VCB Vcb)
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{
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PVOID inode = NULL;
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inode = ExAllocateFromNPagedLookasideList(
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&(Vcb->InodeLookasideList));
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if (!inode) {
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return NULL;
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}
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RtlZeroMemory(inode, INODE_SIZE);
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DEBUG(DL_INF, ("ExtAllocateInode: Inode created: %ph.\n", inode));
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INC_MEM_COUNT(PS_EXT2_INODE, inode, INODE_SIZE);
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return inode;
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}
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VOID
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Ext2DestroyInode (IN PEXT2_VCB Vcb, IN PEXT2_INODE inode)
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{
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ASSERT(inode != NULL);
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DEBUG(DL_INF, ("Ext2FreeInode: Inode = %ph.\n", inode));
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ExFreeToNPagedLookasideList(&(Vcb->InodeLookasideList), inode);
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DEC_MEM_COUNT(PS_EXT2_INODE, inode, INODE_SIZE);
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}
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struct dentry * Ext2AllocateEntry()
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{
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struct dentry *de;
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de = (struct dentry *)ExAllocateFromNPagedLookasideList(
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&(Ext2Global->Ext2DentryLookasideList));
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if (!de) {
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return NULL;
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}
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RtlZeroMemory(de, sizeof(struct dentry));
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INC_MEM_COUNT(PS_DENTRY, de, sizeof(struct dentry));
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return de;
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}
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VOID Ext2FreeEntry (IN struct dentry *de)
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{
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ASSERT(de != NULL);
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if (de->d_name.name)
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ExFreePool(de->d_name.name);
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ExFreeToNPagedLookasideList(&(Ext2Global->Ext2DentryLookasideList), de);
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DEC_MEM_COUNT(PS_DENTRY, de, sizeof(struct dentry));
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}
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struct dentry *Ext2BuildEntry(PEXT2_VCB Vcb, PEXT2_MCB Dcb, PUNICODE_STRING FileName)
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{
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OEM_STRING Oem = { 0 };
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struct dentry *de = NULL;
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NTSTATUS Status = STATUS_INSUFFICIENT_RESOURCES;
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_SEH2_TRY {
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de = Ext2AllocateEntry();
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if (!de) {
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DEBUG(DL_ERR, ("Ext2BuildEntry: failed to allocate dentry.\n"));
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_SEH2_LEAVE;
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}
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de->d_sb = &Vcb->sb;
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if (Dcb)
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de->d_parent = Dcb->de;
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Oem.MaximumLength = (USHORT)Ext2UnicodeToOEMSize(Vcb, FileName) + 1;
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Oem.Buffer = ExAllocatePool(PagedPool, Oem.MaximumLength);
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if (!Oem.Buffer) {
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DEBUG(DL_ERR, ( "Ex2BuildEntry: failed to allocate OEM name.\n"));
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_SEH2_LEAVE;
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}
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de->d_name.name = Oem.Buffer;
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RtlZeroMemory(Oem.Buffer, Oem.MaximumLength);
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Status = Ext2UnicodeToOEM(Vcb, &Oem, FileName);
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if (!NT_SUCCESS(Status)) {
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DEBUG(DL_CP, ("Ext2BuildEntry: failed to convert %S to OEM.\n", FileName->Buffer));
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_SEH2_LEAVE;
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}
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de->d_name.len = Oem.Length;
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} _SEH2_FINALLY {
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if (!NT_SUCCESS(Status)) {
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if (de)
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Ext2FreeEntry(de);
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}
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} _SEH2_END;
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return de;
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}
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PEXT2_EXTENT
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Ext2AllocateExtent ()
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{
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PEXT2_EXTENT Extent;
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Extent = (PEXT2_EXTENT)ExAllocateFromNPagedLookasideList(
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&(Ext2Global->Ext2ExtLookasideList));
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if (!Extent) {
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return NULL;
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}
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|
|
|
RtlZeroMemory(Extent, sizeof(EXT2_EXTENT));
|
|
INC_MEM_COUNT(PS_EXTENT, Extent, sizeof(EXT2_EXTENT));
|
|
|
|
return Extent;
|
|
}
|
|
|
|
VOID
|
|
Ext2FreeExtent (IN PEXT2_EXTENT Extent)
|
|
{
|
|
ASSERT(Extent != NULL);
|
|
ExFreeToNPagedLookasideList(&(Ext2Global->Ext2ExtLookasideList), Extent);
|
|
DEC_MEM_COUNT(PS_EXTENT, Extent, sizeof(EXT2_EXTENT));
|
|
}
|
|
|
|
ULONG
|
|
Ext2CountExtents(IN PEXT2_EXTENT Chain)
|
|
{
|
|
ULONG count = 0;
|
|
PEXT2_EXTENT List = Chain;
|
|
|
|
while (List) {
|
|
count += 1;
|
|
List = List->Next;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
VOID
|
|
Ext2JointExtents(
|
|
IN PEXT2_EXTENT Chain,
|
|
IN PEXT2_EXTENT Extent
|
|
)
|
|
{
|
|
#ifndef __REACTOS__
|
|
ULONG count = 0;
|
|
#endif
|
|
PEXT2_EXTENT List = Chain;
|
|
|
|
while (List->Next) {
|
|
List = List->Next;
|
|
}
|
|
|
|
List->Next = Extent;
|
|
}
|
|
|
|
|
|
VOID
|
|
Ext2DestroyExtentChain(IN PEXT2_EXTENT Chain)
|
|
{
|
|
PEXT2_EXTENT Extent = NULL, List = Chain;
|
|
|
|
while (List) {
|
|
Extent = List->Next;
|
|
Ext2FreeExtent(List);
|
|
List = Extent;
|
|
}
|
|
}
|
|
|
|
BOOLEAN
|
|
Ext2ListExtents(PLARGE_MCB Extents)
|
|
{
|
|
if (FsRtlNumberOfRunsInLargeMcb(Extents) != 0) {
|
|
|
|
LONGLONG DirtyVba;
|
|
LONGLONG DirtyLba;
|
|
LONGLONG DirtyLength;
|
|
int i, n = 0;
|
|
|
|
for (i = 0; FsRtlGetNextLargeMcbEntry(
|
|
Extents, i, &DirtyVba,
|
|
&DirtyLba, &DirtyLength); i++) {
|
|
if (DirtyVba > 0 && DirtyLba != -1) {
|
|
DEBUG(DL_EXT, ("Vba:%I64xh Lba:%I64xh Len:%I64xh.\n", DirtyVba, DirtyLba, DirtyLength));
|
|
n++;
|
|
}
|
|
}
|
|
|
|
return n ? TRUE : FALSE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
VOID
|
|
Ext2CheckExtent(
|
|
PLARGE_MCB Zone,
|
|
LONGLONG Vbn,
|
|
LONGLONG Lbn,
|
|
LONGLONG Length,
|
|
BOOLEAN bAdded
|
|
)
|
|
{
|
|
#if EXT2_DEBUG
|
|
LONGLONG DirtyLbn;
|
|
LONGLONG DirtyLen;
|
|
LONGLONG RunStart;
|
|
LONGLONG RunLength;
|
|
ULONG Index;
|
|
BOOLEAN bFound = FALSE;
|
|
|
|
bFound = FsRtlLookupLargeMcbEntry(
|
|
Zone,
|
|
Vbn,
|
|
&DirtyLbn,
|
|
&DirtyLen,
|
|
&RunStart,
|
|
&RunLength,
|
|
&Index );
|
|
|
|
if (!bAdded && (!bFound || DirtyLbn == -1)) {
|
|
return;
|
|
}
|
|
|
|
if ( !bFound || (DirtyLbn == -1) ||
|
|
(DirtyLbn != Lbn) ||
|
|
(DirtyLen < Length)) {
|
|
|
|
DbgBreak();
|
|
|
|
for (Index = 0; TRUE; Index++) {
|
|
|
|
if (!FsRtlGetNextLargeMcbEntry(
|
|
Zone,
|
|
Index,
|
|
&Vbn,
|
|
&Lbn,
|
|
&Length)) {
|
|
break;
|
|
}
|
|
|
|
DEBUG(DL_EXT, ("Index = %xh Vbn = %I64xh Lbn = %I64xh Len = %I64xh\n",
|
|
Index, Vbn, Lbn, Length ));
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
VOID
|
|
Ext2ClearAllExtents(PLARGE_MCB Zone)
|
|
{
|
|
_SEH2_TRY {
|
|
FsRtlTruncateLargeMcb(Zone, (LONGLONG)0);
|
|
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
|
|
DbgBreak();
|
|
} _SEH2_END;
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
Ext2AddVcbExtent (
|
|
IN PEXT2_VCB Vcb,
|
|
IN LONGLONG Vbn,
|
|
IN LONGLONG Length
|
|
)
|
|
{
|
|
ULONG TriedTimes = 0;
|
|
|
|
LONGLONG Offset = 0;
|
|
BOOLEAN rc = FALSE;
|
|
|
|
Offset = Vbn & (~(Vcb->IoUnitSize - 1));
|
|
Length = (Vbn - Offset + Length + Vcb->IoUnitSize - 1) &
|
|
~(Vcb->IoUnitSize - 1);
|
|
|
|
ASSERT ((Offset & (Vcb->IoUnitSize - 1)) == 0);
|
|
ASSERT ((Length & (Vcb->IoUnitSize - 1)) == 0);
|
|
|
|
Offset = (Offset >> Vcb->IoUnitBits) + 1;
|
|
Length = (Length >> Vcb->IoUnitBits);
|
|
|
|
Again:
|
|
|
|
_SEH2_TRY {
|
|
rc = FsRtlAddLargeMcbEntry(
|
|
&Vcb->Extents,
|
|
Offset,
|
|
Offset,
|
|
Length
|
|
);
|
|
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
|
|
DbgBreak();
|
|
rc = FALSE;
|
|
} _SEH2_END;
|
|
|
|
if (!rc && ++TriedTimes < 10) {
|
|
Ext2Sleep(TriedTimes * 100);
|
|
goto Again;
|
|
}
|
|
|
|
DEBUG(DL_EXT, ("Ext2AddVcbExtent: Vbn=%I64xh Length=%I64xh,"
|
|
" rc=%d Runs=%u\n", Offset, Length, rc,
|
|
FsRtlNumberOfRunsInLargeMcb(&Vcb->Extents)));
|
|
|
|
if (rc) {
|
|
Ext2CheckExtent(&Vcb->Extents, Offset, Offset, Length, TRUE);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
BOOLEAN
|
|
Ext2RemoveVcbExtent (
|
|
IN PEXT2_VCB Vcb,
|
|
IN LONGLONG Vbn,
|
|
IN LONGLONG Length
|
|
)
|
|
{
|
|
ULONG TriedTimes = 0;
|
|
LONGLONG Offset = 0;
|
|
BOOLEAN rc = TRUE;
|
|
|
|
Offset = Vbn & (~(Vcb->IoUnitSize - 1));
|
|
Length = (Length + Vbn - Offset + Vcb->IoUnitSize - 1) & (~(Vcb->IoUnitSize - 1));
|
|
|
|
ASSERT ((Offset & (Vcb->IoUnitSize - 1)) == 0);
|
|
ASSERT ((Length & (Vcb->IoUnitSize - 1)) == 0);
|
|
|
|
Offset = (Offset >> Vcb->IoUnitBits) + 1;
|
|
Length = (Length >> Vcb->IoUnitBits);
|
|
|
|
Again:
|
|
|
|
_SEH2_TRY {
|
|
FsRtlRemoveLargeMcbEntry(
|
|
&Vcb->Extents,
|
|
Offset,
|
|
Length
|
|
);
|
|
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
|
|
DbgBreak();
|
|
rc = FALSE;
|
|
} _SEH2_END;
|
|
|
|
if (!rc && ++TriedTimes < 10) {
|
|
Ext2Sleep(TriedTimes * 100);
|
|
goto Again;
|
|
}
|
|
|
|
DEBUG(DL_EXT, ("Ext2RemoveVcbExtent: Vbn=%I64xh Length=%I64xh Runs=%u\n",
|
|
Offset, Length, FsRtlNumberOfRunsInLargeMcb(&Vcb->Extents)));
|
|
if (rc) {
|
|
Ext2CheckExtent(&Vcb->Extents, Offset, 0, Length, FALSE);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
BOOLEAN
|
|
Ext2LookupVcbExtent (
|
|
IN PEXT2_VCB Vcb,
|
|
IN LONGLONG Vbn,
|
|
OUT PLONGLONG Lbn,
|
|
OUT PLONGLONG Length
|
|
)
|
|
{
|
|
LONGLONG offset;
|
|
BOOLEAN rc;
|
|
|
|
offset = Vbn & (~(Vcb->IoUnitSize - 1));
|
|
ASSERT ((offset & (Vcb->IoUnitSize - 1)) == 0);
|
|
offset = (offset >> Vcb->IoUnitBits) + 1;
|
|
|
|
rc = FsRtlLookupLargeMcbEntry(
|
|
&(Vcb->Extents),
|
|
offset,
|
|
Lbn,
|
|
Length,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
);
|
|
|
|
if (rc) {
|
|
|
|
if (Lbn && ((*Lbn) != -1)) {
|
|
ASSERT((*Lbn) > 0);
|
|
(*Lbn) = (((*Lbn) - 1) << Vcb->IoUnitBits);
|
|
(*Lbn) += ((Vbn) & (Vcb->IoUnitSize - 1));
|
|
}
|
|
|
|
if (Length && *Length) {
|
|
(*Length) <<= Vcb->IoUnitBits;
|
|
(*Length) -= ((Vbn) & (Vcb->IoUnitSize - 1));
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
Ext2AddMcbExtent (
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb,
|
|
IN LONGLONG Vbn,
|
|
IN LONGLONG Lbn,
|
|
IN LONGLONG Length
|
|
)
|
|
{
|
|
ULONG TriedTimes = 0;
|
|
LONGLONG Base = 0;
|
|
UCHAR Bits = 0;
|
|
BOOLEAN rc = FALSE;
|
|
|
|
Base = (LONGLONG)BLOCK_SIZE;
|
|
Bits = (UCHAR)BLOCK_BITS;
|
|
|
|
ASSERT ((Vbn & (Base - 1)) == 0);
|
|
ASSERT ((Lbn & (Base - 1)) == 0);
|
|
ASSERT ((Length & (Base - 1)) == 0);
|
|
|
|
Vbn = (Vbn >> Bits) + 1;
|
|
Lbn = (Lbn >> Bits) + 1;
|
|
Length = (Length >> Bits);
|
|
|
|
Again:
|
|
|
|
_SEH2_TRY {
|
|
|
|
rc = FsRtlAddLargeMcbEntry(
|
|
&Mcb->Extents,
|
|
Vbn,
|
|
Lbn,
|
|
Length
|
|
);
|
|
|
|
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
|
|
|
|
DbgBreak();
|
|
rc = FALSE;
|
|
} _SEH2_END;
|
|
|
|
if (!rc && ++TriedTimes < 10) {
|
|
Ext2Sleep(TriedTimes * 100);
|
|
goto Again;
|
|
}
|
|
|
|
DEBUG(DL_EXT, ("Ext2AddMcbExtent: Vbn=%I64xh Lbn=%I64xh Length=%I64xh,"
|
|
" rc=%d Runs=%u\n", Vbn, Lbn, Length, rc,
|
|
FsRtlNumberOfRunsInLargeMcb(&Mcb->Extents)));
|
|
|
|
if (rc) {
|
|
Ext2CheckExtent(&Mcb->Extents, Vbn, Lbn, Length, TRUE);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
BOOLEAN
|
|
Ext2RemoveMcbExtent (
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb,
|
|
IN LONGLONG Vbn,
|
|
IN LONGLONG Length
|
|
)
|
|
{
|
|
ULONG TriedTimes = 0;
|
|
LONGLONG Base = 0;
|
|
UCHAR Bits = 0;
|
|
BOOLEAN rc = TRUE;
|
|
|
|
Base = (LONGLONG)BLOCK_SIZE;
|
|
Bits = (UCHAR)BLOCK_BITS;
|
|
|
|
ASSERT ((Vbn & (Base - 1)) == 0);
|
|
ASSERT ((Length & (Base - 1)) == 0);
|
|
|
|
Vbn = (Vbn >> Bits) + 1;
|
|
Length = (Length >> Bits);
|
|
|
|
Again:
|
|
|
|
_SEH2_TRY {
|
|
FsRtlRemoveLargeMcbEntry(
|
|
&Mcb->Extents,
|
|
Vbn,
|
|
Length
|
|
);
|
|
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
|
|
DbgBreak();
|
|
rc = FALSE;
|
|
} _SEH2_END;
|
|
|
|
if (!rc && ++TriedTimes < 10) {
|
|
Ext2Sleep(TriedTimes * 100);
|
|
goto Again;
|
|
}
|
|
|
|
DEBUG(DL_EXT, ("Ext2RemoveMcbExtent: Vbn=%I64xh Length=%I64xh Runs=%u\n",
|
|
Vbn, Length, FsRtlNumberOfRunsInLargeMcb(&Mcb->Extents)));
|
|
if (rc) {
|
|
Ext2CheckExtent(&Mcb->Extents, Vbn, 0, Length, FALSE);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
BOOLEAN
|
|
Ext2LookupMcbExtent (
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb,
|
|
IN LONGLONG Vbn,
|
|
OUT PLONGLONG Lbn,
|
|
OUT PLONGLONG Length
|
|
)
|
|
{
|
|
LONGLONG offset;
|
|
BOOLEAN rc;
|
|
|
|
offset = Vbn & (~((LONGLONG)BLOCK_SIZE - 1));
|
|
ASSERT ((offset & (BLOCK_SIZE - 1)) == 0);
|
|
offset = (offset >> BLOCK_BITS) + 1;
|
|
|
|
rc = FsRtlLookupLargeMcbEntry(
|
|
&(Mcb->Extents),
|
|
offset,
|
|
Lbn,
|
|
Length,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
);
|
|
|
|
if (rc) {
|
|
|
|
if (Lbn && ((*Lbn) != -1)) {
|
|
ASSERT((*Lbn) > 0);
|
|
(*Lbn) = (((*Lbn) - 1) << BLOCK_BITS);
|
|
(*Lbn) += ((Vbn) & ((LONGLONG)BLOCK_SIZE - 1));
|
|
}
|
|
|
|
if (Length && *Length) {
|
|
(*Length) <<= BLOCK_BITS;
|
|
(*Length) -= ((Vbn) & ((LONGLONG)BLOCK_SIZE - 1));
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
Ext2AddMcbMetaExts (
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb,
|
|
IN ULONG Block,
|
|
IN ULONG Length
|
|
)
|
|
{
|
|
ULONG TriedTimes = 0;
|
|
LONGLONG Lbn = Block + 1;
|
|
BOOLEAN rc = TRUE;
|
|
|
|
Again:
|
|
|
|
_SEH2_TRY {
|
|
|
|
rc = FsRtlAddLargeMcbEntry(
|
|
&Mcb->MetaExts,
|
|
Lbn,
|
|
Lbn,
|
|
Length
|
|
);
|
|
|
|
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
|
|
|
|
DbgBreak();
|
|
rc = FALSE;
|
|
} _SEH2_END;
|
|
|
|
if (!rc && ++TriedTimes < 10) {
|
|
Ext2Sleep(TriedTimes * 100);
|
|
goto Again;
|
|
}
|
|
|
|
DEBUG(DL_EXT, ("Ext2AddMcbMetaExts: Block: %xh-%xh rc=%d Runs=%u\n", Block,
|
|
Length, rc, FsRtlNumberOfRunsInLargeMcb(&Mcb->MetaExts)));
|
|
|
|
if (rc) {
|
|
Ext2CheckExtent(&Mcb->MetaExts, Lbn, Lbn, Length, TRUE);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
BOOLEAN
|
|
Ext2RemoveMcbMetaExts (
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb,
|
|
IN ULONG Block,
|
|
IN ULONG Length
|
|
)
|
|
{
|
|
ULONG TriedTimes = 0;
|
|
LONGLONG Lbn = Block + 1;
|
|
BOOLEAN rc = TRUE;
|
|
|
|
Again:
|
|
|
|
_SEH2_TRY {
|
|
|
|
FsRtlRemoveLargeMcbEntry(
|
|
&Mcb->MetaExts,
|
|
Lbn,
|
|
Length
|
|
);
|
|
|
|
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
|
|
DbgBreak();
|
|
rc = FALSE;
|
|
} _SEH2_END;
|
|
|
|
if (!rc && ++TriedTimes < 10) {
|
|
Ext2Sleep(TriedTimes * 100);
|
|
goto Again;
|
|
}
|
|
|
|
DEBUG(DL_EXT, ("Ext2RemoveMcbMetaExts: Block: %xh-%xhh Runs=%u\n", Block,
|
|
Length, FsRtlNumberOfRunsInLargeMcb(&Mcb->MetaExts)));
|
|
if (rc) {
|
|
Ext2CheckExtent(&Mcb->MetaExts, Lbn, 0, Length, FALSE);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
Ext2AddBlockExtent(
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb,
|
|
IN ULONG Start,
|
|
IN ULONG Block,
|
|
IN ULONG Number
|
|
)
|
|
{
|
|
LONGLONG Vbn = 0;
|
|
LONGLONG Lbn = 0;
|
|
LONGLONG Length = 0;
|
|
|
|
Vbn = ((LONGLONG) Start) << BLOCK_BITS;
|
|
Lbn = ((LONGLONG) Block) << BLOCK_BITS;
|
|
Length = ((LONGLONG)Number << BLOCK_BITS);
|
|
|
|
if (Mcb) {
|
|
#if EXT2_DEBUG
|
|
ULONG _block = 0, _mapped = 0;
|
|
BOOLEAN _rc = Ext2LookupBlockExtent(Vcb, Mcb, Start, &_block, &_mapped);
|
|
if (_rc && _block != 0 && (_block != Block)) {
|
|
DbgBreak();
|
|
}
|
|
#endif
|
|
return Ext2AddMcbExtent(Vcb, Mcb, Vbn, Lbn, Length);
|
|
|
|
}
|
|
|
|
ASSERT(Start == Block);
|
|
return Ext2AddVcbExtent(Vcb, Vbn, Length);
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
Ext2LookupBlockExtent(
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb,
|
|
IN ULONG Start,
|
|
IN PULONG Block,
|
|
IN PULONG Mapped
|
|
)
|
|
{
|
|
LONGLONG Vbn = 0;
|
|
LONGLONG Lbn = 0;
|
|
LONGLONG Length = 0;
|
|
|
|
BOOLEAN rc = FALSE;
|
|
|
|
Vbn = ((LONGLONG) Start) << BLOCK_BITS;
|
|
|
|
if (Mcb) {
|
|
rc = Ext2LookupMcbExtent(Vcb, Mcb, Vbn, &Lbn, &Length);
|
|
} else {
|
|
rc = Ext2LookupVcbExtent(Vcb, Vbn, &Lbn, &Length);
|
|
}
|
|
|
|
if (rc) {
|
|
*Mapped = (ULONG)(Length >> BLOCK_BITS);
|
|
if (Lbn != -1 && Length > 0) {
|
|
*Block = (ULONG)(Lbn >> BLOCK_BITS);
|
|
} else {
|
|
*Block = 0;
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
Ext2RemoveBlockExtent(
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb,
|
|
IN ULONG Start,
|
|
IN ULONG Number
|
|
)
|
|
{
|
|
LONGLONG Vbn = 0;
|
|
LONGLONG Length = 0;
|
|
BOOLEAN rc;
|
|
|
|
Vbn = ((LONGLONG) Start) << BLOCK_BITS;
|
|
Length = ((LONGLONG)Number << BLOCK_BITS);
|
|
|
|
if (Mcb) {
|
|
rc = Ext2RemoveMcbExtent(Vcb, Mcb, Vbn, Length);
|
|
} else {
|
|
rc = Ext2RemoveVcbExtent(Vcb, Vbn, Length);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
NTSTATUS
|
|
Ext2InitializeZone(
|
|
IN PEXT2_IRP_CONTEXT IrpContext,
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb
|
|
)
|
|
{
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
|
|
ULONG Start = 0;
|
|
ULONG End;
|
|
ULONG Block;
|
|
ULONG Mapped;
|
|
|
|
Ext2ClearAllExtents(&Mcb->Extents);
|
|
Ext2ClearAllExtents(&Mcb->MetaExts);
|
|
|
|
ASSERT(Mcb != NULL);
|
|
End = (ULONG)((Mcb->Inode.i_size + BLOCK_SIZE - 1) >> BLOCK_BITS);
|
|
|
|
while (Start < End) {
|
|
|
|
Block = Mapped = 0;
|
|
|
|
/* mapping file offset to ext2 block */
|
|
if (INODE_HAS_EXTENT(&Mcb->Inode)) {
|
|
Status = Ext2MapExtent(
|
|
IrpContext,
|
|
Vcb,
|
|
Mcb,
|
|
Start,
|
|
FALSE,
|
|
&Block,
|
|
&Mapped
|
|
);
|
|
} else {
|
|
Status = Ext2MapIndirect(
|
|
IrpContext,
|
|
Vcb,
|
|
Mcb,
|
|
Start,
|
|
FALSE,
|
|
&Block,
|
|
&Mapped
|
|
);
|
|
}
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
goto errorout;
|
|
}
|
|
|
|
/* skip wrong blocks, in case wrongly treating symlink
|
|
target names as blocks, silly */
|
|
if (Block >= TOTAL_BLOCKS) {
|
|
Block = 0;
|
|
}
|
|
|
|
if (Block) {
|
|
if (!Ext2AddBlockExtent(Vcb, Mcb, Start, Block, Mapped)) {
|
|
DbgBreak();
|
|
ClearFlag(Mcb->Flags, MCB_ZONE_INITED);
|
|
Ext2ClearAllExtents(&Mcb->Extents);
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto errorout;
|
|
}
|
|
DEBUG(DL_MAP, ("Ext2InitializeZone %wZ: Block = %xh Mapped = %xh\n",
|
|
&Mcb->FullName, Block, Mapped));
|
|
}
|
|
|
|
/* Mapped is total number of continous blocks or NULL blocks */
|
|
Start += Mapped;
|
|
}
|
|
|
|
/* set mcb zone as initialized */
|
|
SetLongFlag(Mcb->Flags, MCB_ZONE_INITED);
|
|
|
|
errorout:
|
|
|
|
if (!IsZoneInited(Mcb)) {
|
|
Ext2ClearAllExtents(&Mcb->Extents);
|
|
Ext2ClearAllExtents(&Mcb->MetaExts);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
NTSTATUS
|
|
Ext2BuildExtents(
|
|
IN PEXT2_IRP_CONTEXT IrpContext,
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_MCB Mcb,
|
|
IN ULONGLONG Offset,
|
|
IN ULONG Size,
|
|
IN BOOLEAN bAlloc,
|
|
OUT PEXT2_EXTENT * Chain
|
|
)
|
|
{
|
|
ULONG Start, End;
|
|
ULONG Total = 0;
|
|
|
|
LONGLONG Lba = 0;
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
|
|
PEXT2_EXTENT Extent = NULL;
|
|
PEXT2_EXTENT List = *Chain = NULL;
|
|
|
|
if (!IsZoneInited(Mcb)) {
|
|
Status = Ext2InitializeZone(IrpContext, Vcb, Mcb);
|
|
if (!NT_SUCCESS(Status)) {
|
|
DbgBreak();
|
|
}
|
|
}
|
|
|
|
if ((IrpContext && IrpContext->Irp) &&
|
|
((IrpContext->Irp->Flags & IRP_NOCACHE) ||
|
|
(IrpContext->Irp->Flags & IRP_PAGING_IO))) {
|
|
Size = (Size + SECTOR_SIZE - 1) & (~(SECTOR_SIZE - 1));
|
|
}
|
|
|
|
Start = (ULONG)(Offset >> BLOCK_BITS);
|
|
End = (ULONG)((Size + Offset + BLOCK_SIZE - 1) >> BLOCK_BITS);
|
|
|
|
if (End > (ULONG)((Mcb->Inode.i_size + BLOCK_SIZE - 1) >> BLOCK_BITS) ) {
|
|
End = (ULONG)((Mcb->Inode.i_size + BLOCK_SIZE - 1) >> BLOCK_BITS);
|
|
}
|
|
|
|
while (Size > 0 && Start < End) {
|
|
|
|
ULONG Mapped = 0;
|
|
ULONG Length = 0;
|
|
ULONG Block = 0;
|
|
|
|
BOOLEAN rc = FALSE;
|
|
|
|
/* try to map file offset to ext2 block upon Extents cache */
|
|
if (IsZoneInited(Mcb)) {
|
|
rc = Ext2LookupBlockExtent(
|
|
Vcb,
|
|
Mcb,
|
|
Start,
|
|
&Block,
|
|
&Mapped);
|
|
|
|
if (!rc) {
|
|
/* we likely get a sparse file here */
|
|
Mapped = 1;
|
|
Block = 0;
|
|
}
|
|
}
|
|
|
|
/* try to BlockMap in case failed to access Extents cache */
|
|
if (!IsZoneInited(Mcb) || (bAlloc && Block == 0)) {
|
|
|
|
Status = Ext2BlockMap(
|
|
IrpContext,
|
|
Vcb,
|
|
Mcb,
|
|
Start,
|
|
bAlloc,
|
|
&Block,
|
|
&Mapped
|
|
);
|
|
if (!NT_SUCCESS(Status)) {
|
|
break;
|
|
}
|
|
|
|
/* skip wrong blocks, in case wrongly treating symlink
|
|
target names as blocks, silly */
|
|
if (Block >= TOTAL_BLOCKS) {
|
|
Block = 0;
|
|
}
|
|
|
|
/* add new allocated blocks to Mcb zone */
|
|
if (IsZoneInited(Mcb) && Block) {
|
|
if (!Ext2AddBlockExtent(Vcb, Mcb, Start, Block, Mapped)) {
|
|
DbgBreak();
|
|
ClearFlag(Mcb->Flags, MCB_ZONE_INITED);
|
|
Ext2ClearAllExtents(&Mcb->Extents);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* calculate i/o extent */
|
|
Lba = ((LONGLONG)Block << BLOCK_BITS) + Offset - ((LONGLONG)Start << BLOCK_BITS);
|
|
Length = (ULONG)(((LONGLONG)(Start + Mapped) << BLOCK_BITS) - Offset);
|
|
if (Length > Size) {
|
|
Length = Size;
|
|
}
|
|
|
|
if (0 == Length) {
|
|
DbgBreak();
|
|
break;
|
|
}
|
|
|
|
Start += Mapped;
|
|
Offset = (ULONGLONG)Start << BLOCK_BITS;
|
|
|
|
if (Block != 0) {
|
|
|
|
if (List && List->Lba + List->Length == Lba) {
|
|
|
|
/* it's continuous upon previous Extent */
|
|
List->Length += Length;
|
|
|
|
} else {
|
|
|
|
/* have to allocate a new Extent */
|
|
Extent = Ext2AllocateExtent();
|
|
if (!Extent) {
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
DbgBreak();
|
|
break;
|
|
}
|
|
|
|
Extent->Lba = Lba;
|
|
Extent->Length = Length;
|
|
Extent->Offset = Total;
|
|
|
|
/* insert new Extent to chain */
|
|
if (List) {
|
|
List->Next = Extent;
|
|
List = Extent;
|
|
} else {
|
|
*Chain = List = Extent;
|
|
}
|
|
}
|
|
} else {
|
|
if (bAlloc) {
|
|
DbgBreak();
|
|
}
|
|
}
|
|
|
|
Total += Length;
|
|
Size -= Length;
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
Ext2BuildName(
|
|
IN OUT PUNICODE_STRING Target,
|
|
IN PUNICODE_STRING File,
|
|
IN PUNICODE_STRING Parent
|
|
)
|
|
{
|
|
USHORT Length = 0;
|
|
USHORT ParentLen = 0;
|
|
BOOLEAN bBackslash = TRUE;
|
|
|
|
/* free the original buffer */
|
|
if (Target->Buffer) {
|
|
DEC_MEM_COUNT(PS_MCB_NAME, Target->Buffer, Target->MaximumLength);
|
|
Ext2FreePool(Target->Buffer, EXT2_FNAME_MAGIC);
|
|
Target->Length = Target->MaximumLength = 0;
|
|
}
|
|
|
|
/* check the parent directory's name and backslash */
|
|
if (Parent && Parent->Buffer && Parent->Length > 0) {
|
|
ParentLen = Parent->Length / sizeof(WCHAR);
|
|
if (Parent->Buffer[ParentLen - 1] == L'\\') {
|
|
bBackslash = FALSE;
|
|
}
|
|
}
|
|
|
|
if (Parent == NULL || File->Buffer[0] == L'\\') {
|
|
/* must be root inode */
|
|
ASSERT(ParentLen == 0);
|
|
bBackslash = FALSE;
|
|
}
|
|
|
|
/* allocate and initialize new name buffer */
|
|
Length = File->Length;
|
|
Length += (ParentLen + (bBackslash ? 1 : 0)) * sizeof(WCHAR);
|
|
|
|
Target->Buffer = Ext2AllocatePool(
|
|
PagedPool,
|
|
Length + 2,
|
|
EXT2_FNAME_MAGIC
|
|
);
|
|
|
|
if (!Target->Buffer) {
|
|
DEBUG(DL_ERR, ( "Ex2BuildName: failed to allocate name bufer.\n"));
|
|
return FALSE;
|
|
}
|
|
RtlZeroMemory(Target->Buffer, Length + 2);
|
|
|
|
if (ParentLen) {
|
|
RtlCopyMemory(&Target->Buffer[0],
|
|
Parent->Buffer,
|
|
ParentLen * sizeof(WCHAR));
|
|
}
|
|
|
|
if (bBackslash) {
|
|
Target->Buffer[ParentLen++] = L'\\';
|
|
}
|
|
|
|
RtlCopyMemory( &Target->Buffer[ParentLen],
|
|
File->Buffer,
|
|
File->Length);
|
|
|
|
INC_MEM_COUNT(PS_MCB_NAME, Target->Buffer, Length + 2);
|
|
Target->Length = Length;
|
|
Target->MaximumLength = Length + 2;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
PEXT2_MCB
|
|
Ext2AllocateMcb (
|
|
IN PEXT2_VCB Vcb,
|
|
IN PUNICODE_STRING FileName,
|
|
IN PUNICODE_STRING Parent,
|
|
IN ULONG FileAttr
|
|
)
|
|
{
|
|
PEXT2_MCB Mcb = NULL;
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
|
|
/* need wake the reaper thread if there are many Mcb allocated */
|
|
if (Ext2Global->PerfStat.Current.Mcb > (((ULONG)Ext2Global->MaxDepth) * 4)) {
|
|
KeSetEvent(&Ext2Global->McbReaper.Wait, 0, FALSE);
|
|
}
|
|
|
|
/* allocate Mcb from LookasideList */
|
|
Mcb = (PEXT2_MCB) (ExAllocateFromNPagedLookasideList(
|
|
&(Ext2Global->Ext2McbLookasideList)));
|
|
|
|
if (Mcb == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
/* initialize Mcb header */
|
|
RtlZeroMemory(Mcb, sizeof(EXT2_MCB));
|
|
Mcb->Identifier.Type = EXT2MCB;
|
|
Mcb->Identifier.Size = sizeof(EXT2_MCB);
|
|
Mcb->FileAttr = FileAttr;
|
|
|
|
Mcb->Inode.i_priv = (PVOID)Mcb;
|
|
Mcb->Inode.i_sb = &Vcb->sb;
|
|
|
|
/* initialize Mcb names */
|
|
if (FileName) {
|
|
|
|
#if EXT2_DEBUG
|
|
if ( FileName->Length == 2 &&
|
|
FileName->Buffer[0] == L'\\') {
|
|
DEBUG(DL_RES, ( "Ext2AllocateMcb: Root Mcb is to be created !\n"));
|
|
}
|
|
|
|
if ( FileName->Length == 2 &&
|
|
FileName->Buffer[0] == L'.') {
|
|
DbgBreak();
|
|
}
|
|
|
|
if ( FileName->Length == 4 &&
|
|
FileName->Buffer[0] == L'.' &&
|
|
FileName->Buffer[1] == L'.' ) {
|
|
DbgBreak();
|
|
}
|
|
#endif
|
|
|
|
if (( FileName->Length >= 4 && FileName->Buffer[0] == L'.') &&
|
|
((FileName->Length == 4 && FileName->Buffer[1] != L'.') ||
|
|
FileName->Length >= 6 )) {
|
|
SetFlag(Mcb->FileAttr, FILE_ATTRIBUTE_HIDDEN);
|
|
}
|
|
|
|
if (!Ext2BuildName(&Mcb->ShortName, FileName, NULL)) {
|
|
goto errorout;
|
|
}
|
|
if (!Ext2BuildName(&Mcb->FullName, FileName, Parent)) {
|
|
goto errorout;
|
|
}
|
|
}
|
|
|
|
/* initialize Mcb Extents, it will raise an expcetion if failed */
|
|
_SEH2_TRY {
|
|
FsRtlInitializeLargeMcb(&(Mcb->Extents), NonPagedPool);
|
|
FsRtlInitializeLargeMcb(&(Mcb->MetaExts), NonPagedPool);
|
|
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
DbgBreak();
|
|
} _SEH2_END;
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
goto errorout;
|
|
}
|
|
|
|
INC_MEM_COUNT(PS_MCB, Mcb, sizeof(EXT2_MCB));
|
|
DEBUG(DL_INF, ( "Ext2AllocateMcb: Mcb %wZ created.\n", &Mcb->FullName));
|
|
|
|
return Mcb;
|
|
|
|
errorout:
|
|
|
|
if (Mcb) {
|
|
|
|
if (Mcb->ShortName.Buffer) {
|
|
DEC_MEM_COUNT(PS_MCB_NAME, Mcb->ShortName.Buffer,
|
|
Mcb->ShortName.MaximumLength);
|
|
Ext2FreePool(Mcb->ShortName.Buffer, EXT2_FNAME_MAGIC);
|
|
}
|
|
|
|
if (Mcb->FullName.Buffer) {
|
|
DEC_MEM_COUNT(PS_MCB_NAME, Mcb->FullName.Buffer,
|
|
Mcb->FullName.MaximumLength);
|
|
Ext2FreePool(Mcb->FullName.Buffer, EXT2_FNAME_MAGIC);
|
|
}
|
|
|
|
ExFreeToNPagedLookasideList(&(Ext2Global->Ext2McbLookasideList), Mcb);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
VOID
|
|
Ext2FreeMcb (IN PEXT2_VCB Vcb, IN PEXT2_MCB Mcb)
|
|
{
|
|
#ifndef __REACTOS__
|
|
PEXT2_MCB Parent = Mcb->Parent;
|
|
#endif
|
|
|
|
ASSERT(Mcb != NULL);
|
|
|
|
ASSERT((Mcb->Identifier.Type == EXT2MCB) &&
|
|
(Mcb->Identifier.Size == sizeof(EXT2_MCB)));
|
|
|
|
if ((Mcb->Identifier.Type != EXT2MCB) ||
|
|
(Mcb->Identifier.Size != sizeof(EXT2_MCB))) {
|
|
return;
|
|
}
|
|
|
|
DEBUG(DL_INF, ( "Ext2FreeMcb: Mcb %wZ will be freed.\n", &Mcb->FullName));
|
|
|
|
if (IsMcbSymLink(Mcb) && Mcb->Target) {
|
|
Ext2DerefMcb(Mcb->Target);
|
|
}
|
|
|
|
if (FsRtlNumberOfRunsInLargeMcb(&Mcb->Extents)) {
|
|
DEBUG(DL_EXT, ("List data extents for: %wZ\n", &Mcb->FullName));
|
|
Ext2ListExtents(&Mcb->Extents);
|
|
}
|
|
FsRtlUninitializeLargeMcb(&(Mcb->Extents));
|
|
if (FsRtlNumberOfRunsInLargeMcb(&Mcb->MetaExts)) {
|
|
DEBUG(DL_EXT, ("List meta extents for: %wZ\n", &Mcb->FullName));
|
|
Ext2ListExtents(&Mcb->MetaExts);
|
|
}
|
|
FsRtlUninitializeLargeMcb(&(Mcb->MetaExts));
|
|
ClearLongFlag(Mcb->Flags, MCB_ZONE_INITED);
|
|
|
|
if (Mcb->ShortName.Buffer) {
|
|
DEC_MEM_COUNT(PS_MCB_NAME, Mcb->ShortName.Buffer,
|
|
Mcb->ShortName.MaximumLength);
|
|
Ext2FreePool(Mcb->ShortName.Buffer, EXT2_FNAME_MAGIC);
|
|
}
|
|
|
|
if (Mcb->FullName.Buffer) {
|
|
DEC_MEM_COUNT(PS_MCB_NAME, Mcb->FullName.Buffer,
|
|
Mcb->FullName.MaximumLength);
|
|
Ext2FreePool(Mcb->FullName.Buffer, EXT2_FNAME_MAGIC);
|
|
}
|
|
|
|
/* free dentry */
|
|
if (Mcb->de) {
|
|
Ext2FreeEntry(Mcb->de);
|
|
}
|
|
|
|
Mcb->Identifier.Type = 0;
|
|
Mcb->Identifier.Size = 0;
|
|
|
|
ExFreeToNPagedLookasideList(&(Ext2Global->Ext2McbLookasideList), Mcb);
|
|
DEC_MEM_COUNT(PS_MCB, Mcb, sizeof(EXT2_MCB));
|
|
}
|
|
|
|
|
|
PEXT2_MCB
|
|
Ext2SearchMcb(
|
|
PEXT2_VCB Vcb,
|
|
PEXT2_MCB Parent,
|
|
PUNICODE_STRING FileName
|
|
)
|
|
{
|
|
BOOLEAN LockAcquired = FALSE;
|
|
PEXT2_MCB Mcb = NULL;
|
|
|
|
_SEH2_TRY {
|
|
ExAcquireResourceSharedLite(&Vcb->McbLock, TRUE);
|
|
LockAcquired = TRUE;
|
|
Mcb = Ext2SearchMcbWithoutLock(Parent, FileName);
|
|
} _SEH2_FINALLY {
|
|
if (LockAcquired) {
|
|
ExReleaseResourceLite(&Vcb->McbLock);
|
|
}
|
|
} _SEH2_END;
|
|
|
|
return Mcb;
|
|
}
|
|
|
|
|
|
PEXT2_MCB
|
|
Ext2SearchMcbWithoutLock(
|
|
PEXT2_MCB Parent,
|
|
PUNICODE_STRING FileName
|
|
)
|
|
{
|
|
PEXT2_MCB TmpMcb = NULL;
|
|
|
|
DEBUG(DL_RES, ("Ext2SearchMcb: %wZ\n", FileName));
|
|
|
|
_SEH2_TRY {
|
|
|
|
Ext2ReferMcb(Parent);
|
|
|
|
if (Ext2IsDot(FileName)) {
|
|
TmpMcb = Parent;
|
|
Ext2ReferMcb(Parent);
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
if (Ext2IsDotDot(FileName)) {
|
|
if (IsMcbRoot(Parent)) {
|
|
TmpMcb = Parent;
|
|
} else {
|
|
TmpMcb = Parent->Parent;
|
|
}
|
|
if (TmpMcb) {
|
|
Ext2ReferMcb(TmpMcb);
|
|
}
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
if (IsMcbSymLink(Parent)) {
|
|
if (Parent->Target) {
|
|
TmpMcb = Parent->Target->Child;
|
|
ASSERT(!IsMcbSymLink(Parent->Target));
|
|
} else {
|
|
TmpMcb = NULL;
|
|
_SEH2_LEAVE;
|
|
}
|
|
} else {
|
|
TmpMcb = Parent->Child;
|
|
}
|
|
|
|
while (TmpMcb) {
|
|
|
|
if (!RtlCompareUnicodeString(
|
|
&(TmpMcb->ShortName),
|
|
FileName, TRUE )) {
|
|
Ext2ReferMcb(TmpMcb);
|
|
break;
|
|
}
|
|
|
|
TmpMcb = TmpMcb->Next;
|
|
}
|
|
|
|
} _SEH2_FINALLY {
|
|
|
|
Ext2DerefMcb(Parent);
|
|
} _SEH2_END;
|
|
|
|
return TmpMcb;
|
|
}
|
|
|
|
VOID
|
|
Ext2InsertMcb (
|
|
PEXT2_VCB Vcb,
|
|
PEXT2_MCB Parent,
|
|
PEXT2_MCB Child
|
|
)
|
|
{
|
|
BOOLEAN LockAcquired = FALSE;
|
|
PEXT2_MCB Mcb = NULL;
|
|
|
|
_SEH2_TRY {
|
|
|
|
ExAcquireResourceExclusiveLite(
|
|
&Vcb->McbLock,
|
|
TRUE );
|
|
LockAcquired = TRUE;
|
|
|
|
/* use it's target if it's a symlink */
|
|
if (IsMcbSymLink(Parent)) {
|
|
Parent = Parent->Target;
|
|
ASSERT(!IsMcbSymLink(Parent));
|
|
}
|
|
|
|
Mcb = Parent->Child;
|
|
while (Mcb) {
|
|
if (Mcb == Child) {
|
|
break;
|
|
}
|
|
Mcb = Mcb->Next;
|
|
}
|
|
|
|
if (Mcb) {
|
|
/* already attached in the list */
|
|
DEBUG(DL_ERR, ( "Ext2InsertMcb: Child Mcb is alreay attached.\n"));
|
|
if (!IsFlagOn(Mcb->Flags, MCB_ENTRY_TREE)) {
|
|
SetLongFlag(Child->Flags, MCB_ENTRY_TREE);
|
|
DEBUG(DL_ERR, ( "Ext2InsertMcb: Child Mcb's flag isn't set.\n"));
|
|
}
|
|
|
|
DbgBreak();
|
|
|
|
} else {
|
|
|
|
/* insert this Mcb into the head */
|
|
Child->Next = Parent->Child;
|
|
Parent->Child = Child;
|
|
Child->Parent = Parent;
|
|
Child->de->d_parent = Parent->de;
|
|
Ext2ReferMcb(Parent);
|
|
SetLongFlag(Child->Flags, MCB_ENTRY_TREE);
|
|
}
|
|
|
|
} _SEH2_FINALLY {
|
|
|
|
if (LockAcquired) {
|
|
ExReleaseResourceLite(&Vcb->McbLock);
|
|
}
|
|
} _SEH2_END;
|
|
}
|
|
|
|
BOOLEAN
|
|
Ext2RemoveMcb (
|
|
PEXT2_VCB Vcb,
|
|
PEXT2_MCB Mcb
|
|
)
|
|
{
|
|
PEXT2_MCB TmpMcb = NULL;
|
|
BOOLEAN LockAcquired = FALSE;
|
|
BOOLEAN bLinked = FALSE;
|
|
|
|
_SEH2_TRY {
|
|
|
|
ExAcquireResourceExclusiveLite(&Vcb->McbLock, TRUE);
|
|
LockAcquired = TRUE;
|
|
|
|
if (Mcb->Parent) {
|
|
|
|
if (Mcb->Parent->Child == Mcb) {
|
|
Mcb->Parent->Child = Mcb->Next;
|
|
bLinked = TRUE;
|
|
} else {
|
|
TmpMcb = Mcb->Parent->Child;
|
|
|
|
while (TmpMcb && TmpMcb->Next != Mcb) {
|
|
TmpMcb = TmpMcb->Next;
|
|
}
|
|
|
|
if (TmpMcb) {
|
|
TmpMcb->Next = Mcb->Next;
|
|
bLinked = TRUE;
|
|
} else {
|
|
/* we got errors: link broken */
|
|
}
|
|
}
|
|
|
|
if (bLinked) {
|
|
if (IsFlagOn(Mcb->Flags, MCB_ENTRY_TREE)) {
|
|
DEBUG(DL_RES, ("Mcb %p %wZ removed from Mcb %p %wZ\n", Mcb,
|
|
&Mcb->FullName, Mcb->Parent, &Mcb->Parent->FullName));
|
|
Ext2DerefMcb(Mcb->Parent);
|
|
ClearLongFlag(Mcb->Flags, MCB_ENTRY_TREE);
|
|
} else {
|
|
DbgBreak();
|
|
}
|
|
} else {
|
|
if (IsFlagOn(Mcb->Flags, MCB_ENTRY_TREE)) {
|
|
ClearLongFlag(Mcb->Flags, MCB_ENTRY_TREE);
|
|
}
|
|
DbgBreak();
|
|
}
|
|
Mcb->Parent = NULL;
|
|
Mcb->de->d_parent = NULL;
|
|
}
|
|
|
|
} _SEH2_FINALLY {
|
|
|
|
if (LockAcquired) {
|
|
ExReleaseResourceLite(&Vcb->McbLock);
|
|
}
|
|
} _SEH2_END;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
VOID
|
|
Ext2CleanupAllMcbs(PEXT2_VCB Vcb)
|
|
{
|
|
BOOLEAN LockAcquired = FALSE;
|
|
PEXT2_MCB Mcb = NULL;
|
|
|
|
_SEH2_TRY {
|
|
|
|
ExAcquireResourceExclusiveLite(
|
|
&Vcb->McbLock,
|
|
TRUE );
|
|
LockAcquired = TRUE;
|
|
|
|
while ((Mcb = Ext2FirstUnusedMcb(Vcb, TRUE, Vcb->NumOfMcb)) != 0) {
|
|
while (Mcb) {
|
|
PEXT2_MCB Next = Mcb->Next;
|
|
if (IsMcbSymLink(Mcb)) {
|
|
Mcb->Target = NULL;
|
|
}
|
|
Ext2FreeMcb(Vcb, Mcb);
|
|
Mcb = Next;
|
|
}
|
|
}
|
|
Ext2FreeMcb(Vcb, Vcb->McbTree);
|
|
Vcb->McbTree = NULL;
|
|
|
|
} _SEH2_FINALLY {
|
|
|
|
if (LockAcquired) {
|
|
ExReleaseResourceLite(&Vcb->McbLock);
|
|
}
|
|
} _SEH2_END;
|
|
}
|
|
|
|
BOOLEAN
|
|
Ext2CheckSetBlock(PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb, LONGLONG Block)
|
|
{
|
|
PEXT2_GROUP_DESC gd;
|
|
struct buffer_head *gb = NULL;
|
|
struct buffer_head *bh = NULL;
|
|
ULONG group, dwBlk, Length;
|
|
RTL_BITMAP bitmap;
|
|
BOOLEAN bModified = FALSE;
|
|
|
|
group = (ULONG)(Block - EXT2_FIRST_DATA_BLOCK) / BLOCKS_PER_GROUP;
|
|
dwBlk = (ULONG)(Block - EXT2_FIRST_DATA_BLOCK) % BLOCKS_PER_GROUP;
|
|
|
|
gd = ext4_get_group_desc(&Vcb->sb, group, &gb);
|
|
if (!gd) {
|
|
return FALSE;
|
|
}
|
|
bh = sb_getblk(&Vcb->sb, ext4_block_bitmap(&Vcb->sb, gd));
|
|
|
|
if (group == Vcb->sbi.s_groups_count - 1) {
|
|
Length = (ULONG)(TOTAL_BLOCKS % BLOCKS_PER_GROUP);
|
|
|
|
/* s_blocks_count is integer multiple of s_blocks_per_group */
|
|
if (Length == 0)
|
|
Length = BLOCKS_PER_GROUP;
|
|
} else {
|
|
Length = BLOCKS_PER_GROUP;
|
|
}
|
|
|
|
if (dwBlk >= Length) {
|
|
fini_bh(&gb);
|
|
fini_bh(&bh);
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
RtlInitializeBitMap(&bitmap, (PULONG)bh->b_data, Length);
|
|
|
|
if (RtlCheckBit(&bitmap, dwBlk) == 0) {
|
|
DbgBreak();
|
|
RtlSetBits(&bitmap, dwBlk, 1);
|
|
bModified = TRUE;
|
|
mark_buffer_dirty(bh);
|
|
}
|
|
|
|
fini_bh(&gb);
|
|
fini_bh(&bh);
|
|
|
|
return (!bModified);
|
|
}
|
|
|
|
BOOLEAN
|
|
Ext2CheckBitmapConsistency(PEXT2_IRP_CONTEXT IrpContext, PEXT2_VCB Vcb)
|
|
{
|
|
ULONG i, j, InodeBlocks;
|
|
|
|
for (i = 0; i < Vcb->sbi.s_groups_count; i++) {
|
|
|
|
PEXT2_GROUP_DESC gd;
|
|
struct buffer_head *bh = NULL;
|
|
|
|
gd = ext4_get_group_desc(&Vcb->sb, i, &bh);
|
|
if (!gd)
|
|
continue;
|
|
Ext2CheckSetBlock(IrpContext, Vcb, ext4_block_bitmap(&Vcb->sb, gd));
|
|
Ext2CheckSetBlock(IrpContext, Vcb, ext4_inode_bitmap(&Vcb->sb, gd));
|
|
|
|
|
|
if (i == Vcb->sbi.s_groups_count - 1) {
|
|
InodeBlocks = ((INODES_COUNT % INODES_PER_GROUP) *
|
|
Vcb->InodeSize + Vcb->BlockSize - 1) /
|
|
(Vcb->BlockSize);
|
|
} else {
|
|
InodeBlocks = (INODES_PER_GROUP * Vcb->InodeSize +
|
|
Vcb->BlockSize - 1) / (Vcb->BlockSize);
|
|
}
|
|
|
|
for (j = 0; j < InodeBlocks; j++ )
|
|
Ext2CheckSetBlock(IrpContext, Vcb, ext4_inode_table(&Vcb->sb, gd) + j);
|
|
|
|
fini_bh(&bh);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Ext2Global->Resource should be already acquired */
|
|
VOID
|
|
Ext2InsertVcb(PEXT2_VCB Vcb)
|
|
{
|
|
InsertTailList(&(Ext2Global->VcbList), &Vcb->Next);
|
|
}
|
|
|
|
|
|
/* Ext2Global->Resource should be already acquired */
|
|
VOID
|
|
Ext2RemoveVcb(PEXT2_VCB Vcb)
|
|
{
|
|
RemoveEntryList(&Vcb->Next);
|
|
InitializeListHead(&Vcb->Next);
|
|
}
|
|
|
|
NTSTATUS
|
|
Ext2QueryVolumeParams(IN PEXT2_VCB Vcb, IN PUNICODE_STRING Params)
|
|
{
|
|
NTSTATUS Status;
|
|
RTL_QUERY_REGISTRY_TABLE QueryTable[2];
|
|
|
|
UNICODE_STRING UniName;
|
|
PUSHORT UniBuffer = NULL;
|
|
|
|
USHORT UUID[50];
|
|
|
|
int i;
|
|
int len = 0;
|
|
|
|
/* zero params */
|
|
RtlZeroMemory(Params, sizeof(UNICODE_STRING));
|
|
|
|
/* constructing volume UUID name */
|
|
memset(UUID, 0, sizeof(USHORT) * 50);
|
|
for (i=0; i < 16; i++) {
|
|
if (i == 0) {
|
|
swprintf((wchar_t *)&UUID[len], L"{%2.2X",Vcb->SuperBlock->s_uuid[i]);
|
|
len += 3;
|
|
} else if (i == 15) {
|
|
swprintf((wchar_t *)&UUID[len], L"-%2.2X}", Vcb->SuperBlock->s_uuid[i]);
|
|
len +=4;
|
|
} else {
|
|
swprintf((wchar_t *)&UUID[len], L"-%2.2X", Vcb->SuperBlock->s_uuid[i]);
|
|
len += 3;
|
|
}
|
|
}
|
|
|
|
/* allocating memory for UniBuffer */
|
|
UniBuffer = Ext2AllocatePool(PagedPool, 1024, EXT2_PARAM_MAGIC);
|
|
if (NULL == UniBuffer) {
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
goto errorout;
|
|
}
|
|
RtlZeroMemory(UniBuffer, 1024);
|
|
|
|
/* querying volume parameter string */
|
|
RtlZeroMemory(&QueryTable[0], sizeof(RTL_QUERY_REGISTRY_TABLE) * 2);
|
|
QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_REQUIRED;
|
|
QueryTable[0].Name = UUID;
|
|
QueryTable[0].EntryContext = &(UniName);
|
|
UniName.MaximumLength = 1024;
|
|
UniName.Length = 0;
|
|
UniName.Buffer = UniBuffer;
|
|
|
|
Status = RtlQueryRegistryValues(
|
|
RTL_REGISTRY_ABSOLUTE,
|
|
Ext2Global->RegistryPath.Buffer,
|
|
&QueryTable[0],
|
|
NULL,
|
|
NULL
|
|
);
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
goto errorout;
|
|
}
|
|
|
|
errorout:
|
|
|
|
if (NT_SUCCESS(Status)) {
|
|
*Params = UniName;
|
|
} else {
|
|
if (UniBuffer) {
|
|
Ext2FreePool(UniBuffer, EXT2_PARAM_MAGIC);
|
|
}
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
VOID
|
|
Ext2ParseRegistryVolumeParams(
|
|
IN PUNICODE_STRING Params,
|
|
OUT PEXT2_VOLUME_PROPERTY3 Property
|
|
)
|
|
{
|
|
WCHAR Codepage[CODEPAGE_MAXLEN];
|
|
WCHAR Prefix[HIDINGPAT_LEN];
|
|
WCHAR Suffix[HIDINGPAT_LEN];
|
|
USHORT MountPoint[4];
|
|
UCHAR DrvLetter[4];
|
|
WCHAR wUID[8], wGID[8], wEUID[8], wEGID[8];
|
|
CHAR sUID[8], sGID[8], sEUID[8], sEGID[8];
|
|
|
|
BOOLEAN bWriteSupport = FALSE,
|
|
bCheckBitmap = FALSE,
|
|
bCodeName = FALSE,
|
|
bMountPoint = FALSE;
|
|
BOOLEAN bUID = 0, bGID = 0, bEUID = 0, bEGID = 0;
|
|
|
|
struct {
|
|
PWCHAR Name; /* parameters name */
|
|
PBOOLEAN bExist; /* is it contained in params */
|
|
USHORT Length; /* parameter value length */
|
|
PWCHAR uValue; /* value buffer in unicode */
|
|
PCHAR aValue; /* value buffer in ansi */
|
|
} ParamPattern[] = {
|
|
/* writing support */
|
|
{READING_ONLY, &Property->bReadonly, 0, NULL, NULL},
|
|
{WRITING_SUPPORT, &bWriteSupport, 0, NULL, NULL},
|
|
{EXT3_FORCEWRITING, &Property->bExt3Writable, 0, NULL, NULL},
|
|
|
|
/* need check bitmap */
|
|
{CHECKING_BITMAP, &bCheckBitmap, 0, NULL, NULL},
|
|
/* codepage */
|
|
{CODEPAGE_NAME, &bCodeName, CODEPAGE_MAXLEN,
|
|
&Codepage[0], Property->Codepage},
|
|
/* filter prefix and suffix */
|
|
{HIDING_PREFIX, &Property->bHidingPrefix, HIDINGPAT_LEN,
|
|
&Prefix[0], Property->sHidingPrefix},
|
|
{HIDING_SUFFIX, &Property->bHidingSuffix, HIDINGPAT_LEN,
|
|
&Suffix[0], Property->sHidingSuffix},
|
|
{MOUNT_POINT, &bMountPoint, 4,
|
|
&MountPoint[0], &DrvLetter[0]},
|
|
|
|
{UID, &bUID, 8, &wUID[0], &sUID[0],},
|
|
{GID, &bGID, 8, &wGID[0], &sGID[0]},
|
|
{EUID, &bEUID, 8, &wEUID[0], &sEUID[0]},
|
|
{EGID, &bEGID, 8, &wEGID[0], &sEGID[0]},
|
|
|
|
/* end */
|
|
{NULL, NULL, 0, NULL}
|
|
};
|
|
|
|
USHORT i, j, k;
|
|
|
|
RtlZeroMemory(Codepage, CODEPAGE_MAXLEN);
|
|
RtlZeroMemory(Prefix, HIDINGPAT_LEN);
|
|
RtlZeroMemory(Suffix, HIDINGPAT_LEN);
|
|
RtlZeroMemory(MountPoint, sizeof(USHORT) * 4);
|
|
RtlZeroMemory(DrvLetter, sizeof(CHAR) * 4);
|
|
|
|
RtlZeroMemory(Property, sizeof(EXT2_VOLUME_PROPERTY3));
|
|
Property->Magic = EXT2_VOLUME_PROPERTY_MAGIC;
|
|
Property->Command = APP_CMD_SET_PROPERTY3;
|
|
|
|
for (i=0; ParamPattern[i].Name != NULL; i++) {
|
|
|
|
UNICODE_STRING Name1=*Params, Name2;
|
|
RtlInitUnicodeString(&Name2, ParamPattern[i].Name);
|
|
*ParamPattern[i].bExist = FALSE;
|
|
|
|
for (j=0; j * sizeof(WCHAR) + Name2.Length <= Params->Length ; j++) {
|
|
|
|
Name1.MaximumLength = Params->Length - j * sizeof(WCHAR);
|
|
Name1.Length = Name2.Length;
|
|
Name1.Buffer = &Params->Buffer[j];
|
|
|
|
if (!RtlCompareUnicodeString(&Name1, &Name2, TRUE)) {
|
|
if (j * sizeof(WCHAR) + Name2.Length == Params->Length ||
|
|
Name1.Buffer[Name2.Length/sizeof(WCHAR)] == L';' ||
|
|
Name1.Buffer[Name2.Length/sizeof(WCHAR)] == L',' ) {
|
|
*(ParamPattern[i].bExist) = TRUE;
|
|
} else if ((j * 2 + Name2.Length < Params->Length + 2) ||
|
|
(Name1.Buffer[Name2.Length/sizeof(WCHAR)] == L'=' )) {
|
|
j += Name2.Length/sizeof(WCHAR) + 1;
|
|
k = 0;
|
|
while ( j + k < Params->Length/2 &&
|
|
k < ParamPattern[i].Length &&
|
|
Params->Buffer[j+k] != L';' &&
|
|
Params->Buffer[j+k] != L',' ) {
|
|
#ifdef __REACTOS__
|
|
ParamPattern[i].uValue[k] = Params->Buffer[j + k];
|
|
k++;
|
|
#else
|
|
ParamPattern[i].uValue[k] = Params->Buffer[j + k++];
|
|
#endif
|
|
}
|
|
if (k) {
|
|
NTSTATUS status;
|
|
ANSI_STRING AnsiName;
|
|
AnsiName.Length = 0;
|
|
AnsiName.MaximumLength =ParamPattern[i].Length;
|
|
AnsiName.Buffer = ParamPattern[i].aValue;
|
|
|
|
Name2.Buffer = ParamPattern[i].uValue;
|
|
Name2.MaximumLength = Name2.Length = k * sizeof(WCHAR);
|
|
status = RtlUnicodeStringToAnsiString(
|
|
&AnsiName, &Name2, FALSE);
|
|
if (NT_SUCCESS(status)) {
|
|
*(ParamPattern[i].bExist) = TRUE;
|
|
} else {
|
|
*ParamPattern[i].bExist = FALSE;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (bMountPoint) {
|
|
Property->DrvLetter = DrvLetter[0];
|
|
Property->DrvLetter |= 0x80;
|
|
}
|
|
|
|
if (bUID && bGID) {
|
|
SetFlag(Property->Flags2, EXT2_VPROP3_USERIDS);
|
|
sUID[7] = sGID[7] = sEUID[7] = sEGID[7] = 0;
|
|
Property->uid = (USHORT)atoi(sUID);
|
|
Property->gid = (USHORT)atoi(sGID);
|
|
if (bEUID) {
|
|
Property->euid = (USHORT)atoi(sEUID);
|
|
Property->egid = (USHORT)atoi(sEGID);
|
|
Property->EIDS = TRUE;
|
|
} else {
|
|
Property->EIDS = FALSE;
|
|
}
|
|
} else {
|
|
ClearFlag(Property->Flags2, EXT2_VPROP3_USERIDS);
|
|
}
|
|
}
|
|
|
|
NTSTATUS
|
|
Ext2PerformRegistryVolumeParams(IN PEXT2_VCB Vcb)
|
|
{
|
|
NTSTATUS Status;
|
|
UNICODE_STRING VolumeParams;
|
|
|
|
Status = Ext2QueryVolumeParams(Vcb, &VolumeParams);
|
|
if (NT_SUCCESS(Status)) {
|
|
|
|
/* set Vcb settings from registery */
|
|
EXT2_VOLUME_PROPERTY3 Property;
|
|
Ext2ParseRegistryVolumeParams(&VolumeParams, &Property);
|
|
Ext2ProcessVolumeProperty(Vcb, &Property, sizeof(Property));
|
|
|
|
} else {
|
|
|
|
/* don't support auto mount */
|
|
if (IsFlagOn(Ext2Global->Flags, EXT2_AUTO_MOUNT)) {
|
|
Status = STATUS_SUCCESS;
|
|
} else {
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
goto errorout;
|
|
}
|
|
|
|
/* set Vcb settings from Ext2Global */
|
|
if (IsFlagOn(Ext2Global->Flags, EXT2_SUPPORT_WRITING)) {
|
|
if (Vcb->IsExt3fs) {
|
|
if (IsFlagOn(Ext2Global->Flags, EXT3_FORCE_WRITING)) {
|
|
ClearLongFlag(Vcb->Flags, VCB_READ_ONLY);
|
|
} else {
|
|
SetLongFlag(Vcb->Flags, VCB_READ_ONLY);
|
|
}
|
|
} else {
|
|
ClearLongFlag(Vcb->Flags, VCB_READ_ONLY);
|
|
}
|
|
} else {
|
|
SetLongFlag(Vcb->Flags, VCB_READ_ONLY);
|
|
}
|
|
|
|
/* set the default codepage */
|
|
Vcb->Codepage.PageTable = Ext2Global->Codepage.PageTable;
|
|
memcpy(Vcb->Codepage.AnsiName, Ext2Global->Codepage.AnsiName, CODEPAGE_MAXLEN);
|
|
Vcb->Codepage.PageTable = Ext2Global->Codepage.PageTable;
|
|
|
|
if (Vcb->bHidingPrefix == Ext2Global->bHidingPrefix) {
|
|
RtlCopyMemory( Vcb->sHidingPrefix,
|
|
Ext2Global->sHidingPrefix,
|
|
HIDINGPAT_LEN);
|
|
} else {
|
|
RtlZeroMemory( Vcb->sHidingPrefix,
|
|
HIDINGPAT_LEN);
|
|
}
|
|
|
|
if (Vcb->bHidingSuffix == Ext2Global->bHidingSuffix) {
|
|
RtlCopyMemory( Vcb->sHidingSuffix,
|
|
Ext2Global->sHidingSuffix,
|
|
HIDINGPAT_LEN);
|
|
} else {
|
|
RtlZeroMemory( Vcb->sHidingSuffix,
|
|
HIDINGPAT_LEN);
|
|
}
|
|
}
|
|
|
|
errorout:
|
|
|
|
if (VolumeParams.Buffer) {
|
|
Ext2FreePool(VolumeParams.Buffer, EXT2_PARAM_MAGIC);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
NTSTATUS
|
|
Ext2InitializeLabel(
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_SUPER_BLOCK Sb
|
|
)
|
|
{
|
|
NTSTATUS status;
|
|
|
|
USHORT Length;
|
|
UNICODE_STRING Label;
|
|
OEM_STRING OemName;
|
|
|
|
Label.MaximumLength = 16 * sizeof(WCHAR);
|
|
Label.Length = 0;
|
|
Label.Buffer = Vcb->Vpb->VolumeLabel;
|
|
Vcb->Vpb->VolumeLabelLength = 0;
|
|
RtlZeroMemory(Label.Buffer, Label.MaximumLength);
|
|
|
|
Length = 16;
|
|
while ( (Length > 0) &&
|
|
((Sb->s_volume_name[Length -1] == 0x00) ||
|
|
(Sb->s_volume_name[Length - 1] == 0x20) )
|
|
) {
|
|
Length--;
|
|
}
|
|
|
|
if (Length == 0) {
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
OemName.Buffer = Sb->s_volume_name;
|
|
OemName.MaximumLength = 16;
|
|
OemName.Length = Length;
|
|
|
|
status = Ext2OEMToUnicode(Vcb, &Label, &OemName);
|
|
if (NT_SUCCESS(status)) {
|
|
Vcb->Vpb->VolumeLabelLength = Label.Length;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static __inline BOOLEAN Ext2IsNullUuid (__u8 * uuid)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 16; i++) {
|
|
if (uuid[i]) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (i >= 16);
|
|
}
|
|
|
|
#define is_power_of_2(x) ((x) != 0 && (((x) & ((x) - 1)) == 0))
|
|
|
|
NTSTATUS
|
|
Ext2InitializeVcb( IN PEXT2_IRP_CONTEXT IrpContext,
|
|
IN PEXT2_VCB Vcb,
|
|
IN PEXT2_SUPER_BLOCK sb,
|
|
IN PDEVICE_OBJECT TargetDevice,
|
|
IN PDEVICE_OBJECT VolumeDevice,
|
|
IN PVPB Vpb )
|
|
{
|
|
NTSTATUS Status = STATUS_UNRECOGNIZED_VOLUME;
|
|
ULONG IoctlSize;
|
|
LONGLONG DiskSize;
|
|
LONGLONG PartSize;
|
|
UNICODE_STRING RootNode;
|
|
USHORT Buffer[2];
|
|
ULONG ChangeCount = 0, features;
|
|
CC_FILE_SIZES FileSizes;
|
|
int i, has_huge_files;
|
|
|
|
BOOLEAN VcbResourceInitialized = FALSE;
|
|
BOOLEAN NotifySyncInitialized = FALSE;
|
|
BOOLEAN ExtentsInitialized = FALSE;
|
|
BOOLEAN InodeLookasideInitialized = FALSE;
|
|
BOOLEAN GroupLoaded = FALSE;
|
|
|
|
_SEH2_TRY {
|
|
|
|
if (Vpb == NULL) {
|
|
Status = STATUS_DEVICE_NOT_READY;
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
/* Reject mounting volume if we encounter unsupported incompat features */
|
|
if (FlagOn(sb->s_feature_incompat, ~EXT4_FEATURE_INCOMPAT_SUPP)) {
|
|
Status = STATUS_UNRECOGNIZED_VOLUME;
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
/* Mount the volume RO if we encounter unsupported ro_compat features */
|
|
if (FlagOn(sb->s_feature_ro_compat, ~EXT4_FEATURE_RO_COMPAT_SUPP)) {
|
|
SetLongFlag(Vcb->Flags, VCB_RO_COMPAT_READ_ONLY);
|
|
}
|
|
|
|
/* Recognize the filesystem as Ext3fs if it supports journalling */
|
|
if (IsFlagOn(sb->s_feature_compat, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) {
|
|
Vcb->IsExt3fs = TRUE;
|
|
}
|
|
|
|
/* check block size */
|
|
Vcb->BlockSize = (EXT2_MIN_BLOCK_SIZE << sb->s_log_block_size);
|
|
/* we cannot handle volume with block size bigger than 64k */
|
|
if (Vcb->BlockSize > EXT2_MAX_USER_BLKSIZE) {
|
|
Status = STATUS_UNRECOGNIZED_VOLUME;
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
if (Vcb->BlockSize >= PAGE_SIZE) {
|
|
Vcb->IoUnitBits = PAGE_SHIFT;
|
|
Vcb->IoUnitSize = PAGE_SIZE;
|
|
} else {
|
|
Vcb->IoUnitSize = Vcb->BlockSize;
|
|
Vcb->IoUnitBits = Ext2Log2(Vcb->BlockSize);
|
|
}
|
|
|
|
/* initialize vcb header members ... */
|
|
Vcb->Header.IsFastIoPossible = FastIoIsNotPossible;
|
|
Vcb->Header.Resource = &(Vcb->MainResource);
|
|
Vcb->Header.PagingIoResource = &(Vcb->PagingIoResource);
|
|
Vcb->OpenVolumeCount = 0;
|
|
Vcb->OpenHandleCount = 0;
|
|
Vcb->ReferenceCount = 0;
|
|
|
|
/* initialize eresources */
|
|
ExInitializeResourceLite(&Vcb->MainResource);
|
|
ExInitializeResourceLite(&Vcb->PagingIoResource);
|
|
ExInitializeResourceLite(&Vcb->MetaInode);
|
|
ExInitializeResourceLite(&Vcb->MetaBlock);
|
|
ExInitializeResourceLite(&Vcb->McbLock);
|
|
ExInitializeResourceLite(&Vcb->sbi.s_gd_lock);
|
|
#ifndef _WIN2K_TARGET_
|
|
ExInitializeFastMutex(&Vcb->Mutex);
|
|
FsRtlSetupAdvancedHeader(&Vcb->Header, &Vcb->Mutex);
|
|
#endif
|
|
VcbResourceInitialized = TRUE;
|
|
|
|
/* initialize Fcb list head */
|
|
InitializeListHead(&Vcb->FcbList);
|
|
ExInitializeResourceLite(&Vcb->FcbLock);
|
|
|
|
/* initialize Mcb list head */
|
|
InitializeListHead(&(Vcb->McbList));
|
|
|
|
/* initialize directory notify list */
|
|
InitializeListHead(&Vcb->NotifyList);
|
|
FsRtlNotifyInitializeSync(&Vcb->NotifySync);
|
|
NotifySyncInitialized = TRUE;
|
|
|
|
/* superblock checking */
|
|
Vcb->SuperBlock = sb;
|
|
|
|
/* initialize Vpb and Label */
|
|
Vcb->DeviceObject = VolumeDevice;
|
|
Vcb->TargetDeviceObject = TargetDevice;
|
|
Vcb->Vpb = Vpb;
|
|
Vcb->RealDevice = Vpb->RealDevice;
|
|
Vpb->DeviceObject = VolumeDevice;
|
|
|
|
/* set inode size */
|
|
Vcb->InodeSize = (ULONG)sb->s_inode_size;
|
|
if (Vcb->InodeSize == 0) {
|
|
Vcb->InodeSize = EXT2_GOOD_OLD_INODE_SIZE;
|
|
}
|
|
|
|
/* initialize inode lookaside list */
|
|
ExInitializeNPagedLookasideList(&(Vcb->InodeLookasideList),
|
|
NULL, NULL, 0, sizeof(EXT2_INODE),
|
|
'SNIE', 0);
|
|
|
|
InodeLookasideInitialized = TRUE;
|
|
|
|
/* initialize label in Vpb */
|
|
Status = Ext2InitializeLabel(Vcb, sb);
|
|
if (!NT_SUCCESS(Status)) {
|
|
DbgBreak();
|
|
}
|
|
|
|
/* check device characteristics flags */
|
|
if (IsFlagOn(Vpb->RealDevice->Characteristics, FILE_REMOVABLE_MEDIA)) {
|
|
SetLongFlag(Vcb->Flags, VCB_REMOVABLE_MEDIA);
|
|
}
|
|
|
|
if (IsFlagOn(Vpb->RealDevice->Characteristics, FILE_FLOPPY_DISKETTE)) {
|
|
SetLongFlag(Vcb->Flags, VCB_FLOPPY_DISK);
|
|
}
|
|
|
|
if (IsFlagOn(Vpb->RealDevice->Characteristics, FILE_READ_ONLY_DEVICE)) {
|
|
SetLongFlag(Vcb->Flags, VCB_WRITE_PROTECTED);
|
|
}
|
|
|
|
if (IsFlagOn(TargetDevice->Characteristics, FILE_READ_ONLY_DEVICE)) {
|
|
SetLongFlag(Vcb->Flags, VCB_WRITE_PROTECTED);
|
|
}
|
|
|
|
/* verify device is writable ? */
|
|
if (Ext2IsMediaWriteProtected(IrpContext, TargetDevice)) {
|
|
SetFlag(Vcb->Flags, VCB_WRITE_PROTECTED);
|
|
}
|
|
|
|
/* initialize UUID and serial number */
|
|
if (Ext2IsNullUuid(sb->s_uuid)) {
|
|
ExUuidCreate((UUID *)sb->s_uuid);
|
|
}
|
|
Vpb->SerialNumber = ((ULONG*)sb->s_uuid)[0] +
|
|
((ULONG*)sb->s_uuid)[1] +
|
|
((ULONG*)sb->s_uuid)[2] +
|
|
((ULONG*)sb->s_uuid)[3];
|
|
|
|
/* query partition size and disk geometry parameters */
|
|
DiskSize = Vcb->DiskGeometry.Cylinders.QuadPart *
|
|
Vcb->DiskGeometry.TracksPerCylinder *
|
|
Vcb->DiskGeometry.SectorsPerTrack *
|
|
Vcb->DiskGeometry.BytesPerSector;
|
|
|
|
IoctlSize = sizeof(PARTITION_INFORMATION);
|
|
Status = Ext2DiskIoControl(
|
|
TargetDevice,
|
|
IOCTL_DISK_GET_PARTITION_INFO,
|
|
NULL,
|
|
0,
|
|
&Vcb->PartitionInformation,
|
|
&IoctlSize );
|
|
if (NT_SUCCESS(Status)) {
|
|
PartSize = Vcb->PartitionInformation.PartitionLength.QuadPart;
|
|
} else {
|
|
Vcb->PartitionInformation.StartingOffset.QuadPart = 0;
|
|
Vcb->PartitionInformation.PartitionLength.QuadPart = DiskSize;
|
|
PartSize = DiskSize;
|
|
Status = STATUS_SUCCESS;
|
|
}
|
|
Vcb->Header.AllocationSize.QuadPart =
|
|
Vcb->Header.FileSize.QuadPart = PartSize;
|
|
|
|
Vcb->Header.ValidDataLength.QuadPart =
|
|
Vcb->Header.FileSize.QuadPart;
|
|
|
|
/* verify count */
|
|
IoctlSize = sizeof(ULONG);
|
|
Status = Ext2DiskIoControl(
|
|
TargetDevice,
|
|
IOCTL_DISK_CHECK_VERIFY,
|
|
NULL,
|
|
0,
|
|
&ChangeCount,
|
|
&IoctlSize );
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
_SEH2_LEAVE;
|
|
}
|
|
Vcb->ChangeCount = ChangeCount;
|
|
|
|
/* create the stream object for ext2 volume */
|
|
Vcb->Volume = IoCreateStreamFileObject(NULL, Vcb->Vpb->RealDevice);
|
|
if (!Vcb->Volume) {
|
|
Status = STATUS_UNRECOGNIZED_VOLUME;
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
/* initialize streaming object file */
|
|
Vcb->Volume->SectionObjectPointer = &(Vcb->SectionObject);
|
|
Vcb->Volume->ReadAccess = TRUE;
|
|
Vcb->Volume->WriteAccess = TRUE;
|
|
Vcb->Volume->DeleteAccess = TRUE;
|
|
Vcb->Volume->FsContext = (PVOID) Vcb;
|
|
Vcb->Volume->FsContext2 = NULL;
|
|
Vcb->Volume->Vpb = Vcb->Vpb;
|
|
|
|
FileSizes.AllocationSize.QuadPart =
|
|
FileSizes.FileSize.QuadPart =
|
|
FileSizes.ValidDataLength.QuadPart =
|
|
Vcb->Header.AllocationSize.QuadPart;
|
|
|
|
CcInitializeCacheMap( Vcb->Volume,
|
|
&FileSizes,
|
|
TRUE,
|
|
&(Ext2Global->CacheManagerNoOpCallbacks),
|
|
Vcb );
|
|
|
|
/* initialize disk block LargetMcb and entry Mcb,
|
|
it will raise an expcetion if failed */
|
|
_SEH2_TRY {
|
|
FsRtlInitializeLargeMcb(&(Vcb->Extents), PagedPool);
|
|
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
DbgBreak();
|
|
} _SEH2_END;
|
|
if (!NT_SUCCESS(Status)) {
|
|
_SEH2_LEAVE;
|
|
}
|
|
ExtentsInitialized = TRUE;
|
|
|
|
/* set block device */
|
|
Vcb->bd.bd_dev = Vcb->RealDevice;
|
|
Vcb->bd.bd_geo = Vcb->DiskGeometry;
|
|
Vcb->bd.bd_part = Vcb->PartitionInformation;
|
|
Vcb->bd.bd_volume = Vcb->Volume;
|
|
Vcb->bd.bd_priv = (void *) Vcb;
|
|
memset(&Vcb->bd.bd_bh_root, 0, sizeof(struct rb_root));
|
|
InitializeListHead(&Vcb->bd.bd_bh_free);
|
|
ExInitializeResourceLite(&Vcb->bd.bd_bh_lock);
|
|
KeInitializeEvent(&Vcb->bd.bd_bh_notify,
|
|
NotificationEvent, TRUE);
|
|
Vcb->bd.bd_bh_cache = kmem_cache_create("bd_bh_buffer",
|
|
Vcb->BlockSize, 0, 0, NULL);
|
|
if (!Vcb->bd.bd_bh_cache) {
|
|
Status = STATUS_INSUFFICIENT_RESOURCES;
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
Vcb->SectorBits = Ext2Log2(SECTOR_SIZE);
|
|
Vcb->sb.s_magic = sb->s_magic;
|
|
Vcb->sb.s_bdev = &Vcb->bd;
|
|
Vcb->sb.s_blocksize = BLOCK_SIZE;
|
|
Vcb->sb.s_blocksize_bits = BLOCK_BITS;
|
|
Vcb->sb.s_priv = (void *) Vcb;
|
|
Vcb->sb.s_fs_info = &Vcb->sbi;
|
|
|
|
Vcb->sbi.s_es = sb;
|
|
Vcb->sbi.s_blocks_per_group = sb->s_blocks_per_group;
|
|
Vcb->sbi.s_first_ino = sb->s_first_ino;
|
|
Vcb->sbi.s_desc_size = sb->s_desc_size;
|
|
|
|
if (EXT3_HAS_INCOMPAT_FEATURE(&Vcb->sb, EXT4_FEATURE_INCOMPAT_64BIT)) {
|
|
if (Vcb->sbi.s_desc_size < EXT4_MIN_DESC_SIZE_64BIT ||
|
|
Vcb->sbi.s_desc_size > EXT4_MAX_DESC_SIZE ||
|
|
!is_power_of_2(Vcb->sbi.s_desc_size)) {
|
|
DEBUG(DL_ERR, ("EXT4-fs: unsupported descriptor size %lu\n", Vcb->sbi.s_desc_size));
|
|
Status = STATUS_DISK_CORRUPT_ERROR;
|
|
_SEH2_LEAVE;
|
|
}
|
|
} else {
|
|
Vcb->sbi.s_desc_size = EXT4_MIN_DESC_SIZE;
|
|
}
|
|
|
|
Vcb->sbi.s_blocks_per_group = sb->s_blocks_per_group;
|
|
Vcb->sbi.s_inodes_per_group = sb->s_inodes_per_group;
|
|
if (EXT3_INODES_PER_GROUP(&Vcb->sb) == 0) {
|
|
Status = STATUS_DISK_CORRUPT_ERROR;
|
|
_SEH2_LEAVE;
|
|
}
|
|
Vcb->sbi.s_inodes_per_block = BLOCK_SIZE / Vcb->InodeSize;
|
|
if (Vcb->sbi.s_inodes_per_block == 0) {
|
|
Status = STATUS_DISK_CORRUPT_ERROR;
|
|
_SEH2_LEAVE;
|
|
}
|
|
Vcb->sbi.s_itb_per_group = Vcb->sbi.s_inodes_per_group /
|
|
Vcb->sbi.s_inodes_per_block;
|
|
|
|
|
|
Vcb->sbi.s_desc_per_block = BLOCK_SIZE / GROUP_DESC_SIZE;
|
|
Vcb->sbi.s_desc_per_block_bits = ilog2(Vcb->sbi.s_desc_per_block);
|
|
|
|
for (i=0; i < 4; i++) {
|
|
Vcb->sbi.s_hash_seed[i] = sb->s_hash_seed[i];
|
|
}
|
|
Vcb->sbi.s_def_hash_version = sb->s_def_hash_version;
|
|
|
|
if (le32_to_cpu(sb->s_rev_level) == EXT3_GOOD_OLD_REV &&
|
|
(EXT3_HAS_COMPAT_FEATURE(&Vcb->sb, ~0U) ||
|
|
EXT3_HAS_RO_COMPAT_FEATURE(&Vcb->sb, ~0U) ||
|
|
EXT3_HAS_INCOMPAT_FEATURE(&Vcb->sb, ~0U))) {
|
|
printk(KERN_WARNING
|
|
"EXT3-fs warning: feature flags set on rev 0 fs, "
|
|
"running e2fsck is recommended\n");
|
|
}
|
|
|
|
/*
|
|
* Check feature flags regardless of the revision level, since we
|
|
* previously didn't change the revision level when setting the flags,
|
|
* so there is a chance incompat flags are set on a rev 0 filesystem.
|
|
*/
|
|
features = EXT3_HAS_INCOMPAT_FEATURE(&Vcb->sb, ~EXT4_FEATURE_INCOMPAT_SUPP);
|
|
if (features & EXT4_FEATURE_INCOMPAT_DIRDATA) {
|
|
SetLongFlag(Vcb->Flags, VCB_READ_ONLY);
|
|
ClearFlag(features, EXT4_FEATURE_INCOMPAT_DIRDATA);
|
|
}
|
|
if (features) {
|
|
printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of "
|
|
"unsupported optional features (%x).\n",
|
|
Vcb->sb.s_id, le32_to_cpu(features));
|
|
Status = STATUS_UNRECOGNIZED_VOLUME;
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
features = EXT3_HAS_RO_COMPAT_FEATURE(&Vcb->sb, ~EXT4_FEATURE_RO_COMPAT_SUPP);
|
|
if (features) {
|
|
printk(KERN_ERR "EXT3-fs: %s: unsupported optional features in this volume: (%x).\n",
|
|
Vcb->sb.s_id, le32_to_cpu(features));
|
|
if (CanIWrite(Vcb)) {
|
|
} else {
|
|
SetLongFlag(Vcb->Flags, VCB_READ_ONLY);
|
|
}
|
|
}
|
|
|
|
has_huge_files = EXT3_HAS_RO_COMPAT_FEATURE(&Vcb->sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE);
|
|
|
|
Vcb->sb.s_maxbytes = ext3_max_size(BLOCK_BITS, has_huge_files);
|
|
Vcb->max_bitmap_bytes = ext3_max_bitmap_size(BLOCK_BITS,
|
|
has_huge_files);
|
|
Vcb->max_bytes = ext3_max_size(BLOCK_BITS, has_huge_files);
|
|
|
|
/* calculate maximum file bocks ... */
|
|
{
|
|
ULONG dwData[EXT2_BLOCK_TYPES] = {EXT2_NDIR_BLOCKS, 1, 1, 1};
|
|
ULONG i;
|
|
|
|
ASSERT(BLOCK_BITS == Ext2Log2(BLOCK_SIZE));
|
|
|
|
Vcb->sbi.s_groups_count = (ULONG)(ext3_blocks_count(sb) - sb->s_first_data_block +
|
|
sb->s_blocks_per_group - 1) / sb->s_blocks_per_group;
|
|
|
|
Vcb->max_data_blocks = 0;
|
|
for (i = 0; i < EXT2_BLOCK_TYPES; i++) {
|
|
if (BLOCK_BITS >= 12 && i == (EXT2_BLOCK_TYPES - 1)) {
|
|
dwData[i] = 0x40000000;
|
|
} else {
|
|
dwData[i] = dwData[i] << ((BLOCK_BITS - 2) * i);
|
|
}
|
|
Vcb->max_blocks_per_layer[i] = dwData[i];
|
|
Vcb->max_data_blocks += Vcb->max_blocks_per_layer[i];
|
|
}
|
|
}
|
|
|
|
Vcb->sbi.s_gdb_count = (Vcb->sbi.s_groups_count + Vcb->sbi.s_desc_per_block - 1) /
|
|
Vcb->sbi.s_desc_per_block;
|
|
/* load all gorup desc */
|
|
if (!Ext2LoadGroup(Vcb)) {
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
_SEH2_LEAVE;
|
|
}
|
|
GroupLoaded = TRUE;
|
|
|
|
/* recovery journal since it's ext3 */
|
|
if (Vcb->IsExt3fs) {
|
|
Ext2RecoverJournal(IrpContext, Vcb);
|
|
if (IsFlagOn(Vcb->Flags, VCB_JOURNAL_RECOVER)) {
|
|
SetLongFlag(Vcb->Flags, VCB_READ_ONLY);
|
|
}
|
|
}
|
|
|
|
/* Now allocating the mcb for root ... */
|
|
Buffer[0] = L'\\';
|
|
Buffer[1] = 0;
|
|
RootNode.Buffer = Buffer;
|
|
RootNode.MaximumLength = RootNode.Length = 2;
|
|
Vcb->McbTree = Ext2AllocateMcb(
|
|
Vcb, &RootNode, NULL,
|
|
FILE_ATTRIBUTE_DIRECTORY
|
|
);
|
|
if (!Vcb->McbTree) {
|
|
DbgBreak();
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
Vcb->sb.s_root = Ext2BuildEntry(Vcb, NULL, &RootNode);
|
|
if (!Vcb->sb.s_root) {
|
|
DbgBreak();
|
|
Status = STATUS_UNSUCCESSFUL;
|
|
_SEH2_LEAVE;
|
|
}
|
|
Vcb->sb.s_root->d_sb = &Vcb->sb;
|
|
Vcb->sb.s_root->d_inode = &Vcb->McbTree->Inode;
|
|
Vcb->McbTree->de = Vcb->sb.s_root;
|
|
|
|
/* load root inode */
|
|
Vcb->McbTree->Inode.i_ino = EXT2_ROOT_INO;
|
|
Vcb->McbTree->Inode.i_sb = &Vcb->sb;
|
|
if (!Ext2LoadInode(Vcb, &Vcb->McbTree->Inode)) {
|
|
DbgBreak();
|
|
Status = STATUS_CANT_WAIT;
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
/* initializeroot node */
|
|
Vcb->McbTree->CreationTime = Ext2NtTime(Vcb->McbTree->Inode.i_ctime);
|
|
Vcb->McbTree->LastAccessTime = Ext2NtTime(Vcb->McbTree->Inode.i_atime);
|
|
Vcb->McbTree->LastWriteTime = Ext2NtTime(Vcb->McbTree->Inode.i_mtime);
|
|
Vcb->McbTree->ChangeTime = Ext2NtTime(Vcb->McbTree->Inode.i_mtime);
|
|
|
|
/* check bitmap if user specifies it */
|
|
if (IsFlagOn(Ext2Global->Flags, EXT2_CHECKING_BITMAP)) {
|
|
Ext2CheckBitmapConsistency(IrpContext, Vcb);
|
|
}
|
|
|
|
/* get anything doen, then refer target device */
|
|
ObReferenceObject(Vcb->TargetDeviceObject);
|
|
|
|
/* query parameters from registry */
|
|
Ext2PerformRegistryVolumeParams(Vcb);
|
|
|
|
SetLongFlag(Vcb->Flags, VCB_INITIALIZED);
|
|
|
|
} _SEH2_FINALLY {
|
|
|
|
if (!NT_SUCCESS(Status)) {
|
|
|
|
if (Vcb->McbTree) {
|
|
Ext2FreeMcb(Vcb, Vcb->McbTree);
|
|
}
|
|
|
|
if (InodeLookasideInitialized) {
|
|
ExDeleteNPagedLookasideList(&(Vcb->InodeLookasideList));
|
|
}
|
|
|
|
if (ExtentsInitialized) {
|
|
if (Vcb->bd.bd_bh_cache) {
|
|
if (GroupLoaded)
|
|
Ext2PutGroup(Vcb);
|
|
kmem_cache_destroy(Vcb->bd.bd_bh_cache);
|
|
}
|
|
FsRtlUninitializeLargeMcb(&(Vcb->Extents));
|
|
}
|
|
|
|
if (Vcb->Volume) {
|
|
if (Vcb->Volume->PrivateCacheMap) {
|
|
Ext2SyncUninitializeCacheMap(Vcb->Volume);
|
|
}
|
|
ObDereferenceObject(Vcb->Volume);
|
|
}
|
|
|
|
if (NotifySyncInitialized) {
|
|
FsRtlNotifyUninitializeSync(&Vcb->NotifySync);
|
|
}
|
|
|
|
if (VcbResourceInitialized) {
|
|
ExDeleteResourceLite(&Vcb->McbLock);
|
|
ExDeleteResourceLite(&Vcb->MetaInode);
|
|
ExDeleteResourceLite(&Vcb->MetaBlock);
|
|
ExDeleteResourceLite(&Vcb->sbi.s_gd_lock);
|
|
ExDeleteResourceLite(&Vcb->MainResource);
|
|
ExDeleteResourceLite(&Vcb->PagingIoResource);
|
|
}
|
|
}
|
|
} _SEH2_END;
|
|
|
|
return Status;
|
|
}
|
|
|
|
|
|
VOID
|
|
Ext2TearDownStream(IN PEXT2_VCB Vcb)
|
|
{
|
|
PFILE_OBJECT Stream = Vcb->Volume;
|
|
IO_STATUS_BLOCK IoStatus;
|
|
|
|
ASSERT(Vcb != NULL);
|
|
ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
|
|
(Vcb->Identifier.Size == sizeof(EXT2_VCB)));
|
|
|
|
if (Stream) {
|
|
|
|
Vcb->Volume = NULL;
|
|
|
|
if (IsFlagOn(Stream->Flags, FO_FILE_MODIFIED)) {
|
|
CcFlushCache(&(Vcb->SectionObject), NULL, 0, &IoStatus);
|
|
ClearFlag(Stream->Flags, FO_FILE_MODIFIED);
|
|
}
|
|
|
|
if (Stream->PrivateCacheMap) {
|
|
Ext2SyncUninitializeCacheMap(Stream);
|
|
}
|
|
|
|
ObDereferenceObject(Stream);
|
|
}
|
|
}
|
|
|
|
VOID
|
|
Ext2DestroyVcb (IN PEXT2_VCB Vcb)
|
|
{
|
|
ASSERT(Vcb != NULL);
|
|
ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
|
|
(Vcb->Identifier.Size == sizeof(EXT2_VCB)));
|
|
|
|
DEBUG(DL_FUN, ("Ext2DestroyVcb ...\n"));
|
|
|
|
if (Vcb->Volume) {
|
|
Ext2TearDownStream(Vcb);
|
|
}
|
|
ASSERT(NULL == Vcb->Volume);
|
|
|
|
FsRtlNotifyUninitializeSync(&Vcb->NotifySync);
|
|
Ext2ListExtents(&Vcb->Extents);
|
|
FsRtlUninitializeLargeMcb(&(Vcb->Extents));
|
|
|
|
Ext2CleanupAllMcbs(Vcb);
|
|
|
|
Ext2DropBH(Vcb);
|
|
|
|
if (Vcb->bd.bd_bh_cache)
|
|
kmem_cache_destroy(Vcb->bd.bd_bh_cache);
|
|
ExDeleteResourceLite(&Vcb->bd.bd_bh_lock);
|
|
|
|
if (Vcb->SuperBlock) {
|
|
Ext2FreePool(Vcb->SuperBlock, EXT2_SB_MAGIC);
|
|
Vcb->SuperBlock = NULL;
|
|
}
|
|
|
|
if (IsFlagOn(Vcb->Flags, VCB_NEW_VPB)) {
|
|
ASSERT(Vcb->Vpb2 != NULL);
|
|
DEBUG(DL_DBG, ("Ext2DestroyVcb: Vpb2 to be freed: %p\n", Vcb->Vpb2));
|
|
ExFreePoolWithTag(Vcb->Vpb2, TAG_VPB);
|
|
DEC_MEM_COUNT(PS_VPB, Vcb->Vpb2, sizeof(VPB));
|
|
Vcb->Vpb2 = NULL;
|
|
}
|
|
|
|
ObDereferenceObject(Vcb->TargetDeviceObject);
|
|
|
|
ExDeleteNPagedLookasideList(&(Vcb->InodeLookasideList));
|
|
ExDeleteResourceLite(&Vcb->FcbLock);
|
|
ExDeleteResourceLite(&Vcb->McbLock);
|
|
ExDeleteResourceLite(&Vcb->MetaInode);
|
|
ExDeleteResourceLite(&Vcb->MetaBlock);
|
|
ExDeleteResourceLite(&Vcb->sbi.s_gd_lock);
|
|
ExDeleteResourceLite(&Vcb->PagingIoResource);
|
|
ExDeleteResourceLite(&Vcb->MainResource);
|
|
|
|
DEBUG(DL_DBG, ("Ext2DestroyVcb: DevObject=%p Vcb=%p\n", Vcb->DeviceObject, Vcb));
|
|
IoDeleteDevice(Vcb->DeviceObject);
|
|
DEC_MEM_COUNT(PS_VCB, Vcb->DeviceObject, sizeof(EXT2_VCB));
|
|
}
|
|
|
|
|
|
/* uninitialize cache map */
|
|
|
|
VOID
|
|
Ext2SyncUninitializeCacheMap (
|
|
IN PFILE_OBJECT FileObject
|
|
)
|
|
{
|
|
CACHE_UNINITIALIZE_EVENT UninitializeCompleteEvent;
|
|
NTSTATUS WaitStatus;
|
|
LARGE_INTEGER Ext2LargeZero = {0,0};
|
|
|
|
|
|
KeInitializeEvent( &UninitializeCompleteEvent.Event,
|
|
SynchronizationEvent,
|
|
FALSE);
|
|
|
|
CcUninitializeCacheMap( FileObject,
|
|
&Ext2LargeZero,
|
|
&UninitializeCompleteEvent );
|
|
|
|
WaitStatus = KeWaitForSingleObject( &UninitializeCompleteEvent.Event,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
NULL);
|
|
|
|
ASSERT (NT_SUCCESS(WaitStatus));
|
|
}
|
|
|
|
/* Link Mcb to tail of Vcb->McbList queue */
|
|
|
|
VOID
|
|
Ext2LinkTailMcb(PEXT2_VCB Vcb, PEXT2_MCB Mcb)
|
|
{
|
|
if (Mcb->Inode.i_ino == EXT2_ROOT_INO) {
|
|
return;
|
|
}
|
|
|
|
ExAcquireResourceExclusiveLite(&Vcb->McbLock, TRUE);
|
|
|
|
if (IsFlagOn(Mcb->Flags, MCB_VCB_LINK)) {
|
|
DEBUG(DL_RES, ( "Ext2LinkTailMcb: %wZ already linked.\n",
|
|
&Mcb->FullName));
|
|
} else {
|
|
InsertTailList(&Vcb->McbList, &Mcb->Link);
|
|
SetLongFlag(Mcb->Flags, MCB_VCB_LINK);
|
|
Ext2ReferXcb(&Vcb->NumOfMcb);
|
|
}
|
|
|
|
ExReleaseResourceLite(&Vcb->McbLock);
|
|
}
|
|
|
|
/* Link Mcb to head of Vcb->McbList queue */
|
|
|
|
VOID
|
|
Ext2LinkHeadMcb(PEXT2_VCB Vcb, PEXT2_MCB Mcb)
|
|
{
|
|
if (Mcb->Inode.i_ino == EXT2_ROOT_INO) {
|
|
return;
|
|
}
|
|
|
|
ExAcquireResourceExclusiveLite(&Vcb->McbLock, TRUE);
|
|
|
|
if (!IsFlagOn(Mcb->Flags, MCB_VCB_LINK)) {
|
|
InsertHeadList(&Vcb->McbList, &Mcb->Link);
|
|
SetLongFlag(Mcb->Flags, MCB_VCB_LINK);
|
|
Ext2ReferXcb(&Vcb->NumOfMcb);
|
|
} else {
|
|
DEBUG(DL_RES, ( "Ext2LinkHeadMcb: %wZ already linked.\n",
|
|
&Mcb->FullName));
|
|
}
|
|
ExReleaseResourceLite(&Vcb->McbLock);
|
|
}
|
|
|
|
/* Unlink Mcb from Vcb->McbList queue */
|
|
|
|
VOID
|
|
Ext2UnlinkMcb(PEXT2_VCB Vcb, PEXT2_MCB Mcb)
|
|
{
|
|
if (Mcb->Inode.i_ino == EXT2_ROOT_INO) {
|
|
return;
|
|
}
|
|
|
|
ExAcquireResourceExclusiveLite(&Vcb->McbLock, TRUE);
|
|
|
|
if (IsFlagOn(Mcb->Flags, MCB_VCB_LINK)) {
|
|
RemoveEntryList(&(Mcb->Link));
|
|
ClearLongFlag(Mcb->Flags, MCB_VCB_LINK);
|
|
Ext2DerefXcb(&Vcb->NumOfMcb);
|
|
} else {
|
|
DEBUG(DL_RES, ( "Ext2UnlinkMcb: %wZ already unlinked.\n",
|
|
&Mcb->FullName));
|
|
}
|
|
ExReleaseResourceLite(&Vcb->McbLock);
|
|
}
|
|
|
|
/* get the first Mcb record in Vcb->McbList */
|
|
|
|
PEXT2_MCB
|
|
Ext2FirstUnusedMcb(PEXT2_VCB Vcb, BOOLEAN Wait, ULONG Number)
|
|
{
|
|
PEXT2_MCB Head = NULL;
|
|
PEXT2_MCB Tail = NULL;
|
|
PEXT2_MCB Mcb = NULL;
|
|
PLIST_ENTRY List = NULL;
|
|
ULONG i = 0;
|
|
|
|
if (!ExAcquireResourceExclusiveLite(&Vcb->McbLock, Wait)) {
|
|
return NULL;
|
|
}
|
|
|
|
while (Number--) {
|
|
|
|
if (!IsListEmpty(&Vcb->McbList)) {
|
|
|
|
while (i++ < Vcb->NumOfMcb) {
|
|
|
|
List = RemoveHeadList(&Vcb->McbList);
|
|
Mcb = CONTAINING_RECORD(List, EXT2_MCB, Link);
|
|
ASSERT(IsFlagOn(Mcb->Flags, MCB_VCB_LINK));
|
|
|
|
if (Mcb->Fcb == NULL && !IsMcbRoot(Mcb) &&
|
|
Mcb->Refercount == 0 &&
|
|
(Mcb->Child == NULL || IsMcbSymLink(Mcb))) {
|
|
|
|
Ext2RemoveMcb(Vcb, Mcb);
|
|
ClearLongFlag(Mcb->Flags, MCB_VCB_LINK);
|
|
Ext2DerefXcb(&Vcb->NumOfMcb);
|
|
|
|
/* attach all Mcb into a chain*/
|
|
if (Head) {
|
|
ASSERT(Tail != NULL);
|
|
Tail->Next = Mcb;
|
|
Tail = Mcb;
|
|
} else {
|
|
Head = Tail = Mcb;
|
|
}
|
|
Tail->Next = NULL;
|
|
|
|
} else {
|
|
|
|
InsertTailList(&Vcb->McbList, &Mcb->Link);
|
|
Mcb = NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
ExReleaseResourceLite(&Vcb->McbLock);
|
|
|
|
return Head;
|
|
}
|
|
|
|
|
|
/* Reaper thread to release unused Mcb blocks */
|
|
VOID NTAPI
|
|
Ext2McbReaperThread(
|
|
PVOID Context
|
|
)
|
|
{
|
|
PEXT2_REAPER Reaper = Context;
|
|
PLIST_ENTRY List = NULL;
|
|
LARGE_INTEGER Timeout;
|
|
|
|
PEXT2_VCB Vcb = NULL;
|
|
PEXT2_MCB Mcb = NULL;
|
|
|
|
ULONG i, NumOfMcbs;
|
|
|
|
BOOLEAN GlobalAcquired = FALSE;
|
|
|
|
BOOLEAN DidNothing = TRUE;
|
|
BOOLEAN LastState = TRUE;
|
|
BOOLEAN WaitLock;
|
|
|
|
_SEH2_TRY {
|
|
|
|
Reaper->Thread = PsGetCurrentThread();
|
|
|
|
/* wake up DirverEntry */
|
|
KeSetEvent(&Reaper->Engine, 0, FALSE);
|
|
|
|
/* now process looping */
|
|
while (!IsFlagOn(Reaper->Flags, EXT2_REAPER_FLAG_STOP)) {
|
|
|
|
WaitLock = FALSE;
|
|
|
|
/* calculate how long we need wait */
|
|
if (Ext2Global->PerfStat.Current.Mcb > (((ULONG)Ext2Global->MaxDepth) * 128)) {
|
|
Timeout.QuadPart = (LONGLONG)-1000*1000; /* 0.1 second */
|
|
NumOfMcbs = Ext2Global->MaxDepth * 4;
|
|
WaitLock = TRUE;
|
|
} else if (Ext2Global->PerfStat.Current.Mcb > (((ULONG)Ext2Global->MaxDepth) * 32)) {
|
|
Timeout.QuadPart = (LONGLONG)-1000*1000*5; /* 0.5 second */
|
|
NumOfMcbs = Ext2Global->MaxDepth * 2;
|
|
WaitLock = TRUE;
|
|
} else if (Ext2Global->PerfStat.Current.Mcb > (((ULONG)Ext2Global->MaxDepth) * 8)) {
|
|
Timeout.QuadPart = (LONGLONG)-1000*1000*10; /* 1 second */
|
|
NumOfMcbs = Ext2Global->MaxDepth;
|
|
} else if (Ext2Global->PerfStat.Current.Mcb > (((ULONG)Ext2Global->MaxDepth) * 2)) {
|
|
Timeout.QuadPart = (LONGLONG)-2*1000*1000*10; /* 2 second */
|
|
NumOfMcbs = Ext2Global->MaxDepth / 4;
|
|
} else if (Ext2Global->PerfStat.Current.Mcb > (ULONG)Ext2Global->MaxDepth) {
|
|
Timeout.QuadPart = (LONGLONG)-4*1000*1000*10; /* 4 seconds */
|
|
NumOfMcbs = Ext2Global->MaxDepth / 8;
|
|
} else if (DidNothing) {
|
|
Timeout.QuadPart = (LONGLONG)-8*1000*1000*10; /* 8 seconds */
|
|
if (LastState) {
|
|
Timeout.QuadPart *= 2;
|
|
}
|
|
NumOfMcbs = Ext2Global->MaxDepth / 16;
|
|
} else {
|
|
Timeout.QuadPart = (LONGLONG)-5*1000*1000*10; /* 5 seconds */
|
|
if (LastState) {
|
|
Timeout.QuadPart *= 2;
|
|
}
|
|
NumOfMcbs = Ext2Global->MaxDepth / 32;
|
|
}
|
|
|
|
if (NumOfMcbs == 0)
|
|
NumOfMcbs = 1;
|
|
|
|
LastState = DidNothing;
|
|
|
|
/* wait until it is waken or it times out */
|
|
KeWaitForSingleObject(
|
|
&Reaper->Wait,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
&Timeout
|
|
);
|
|
|
|
if (IsFlagOn(Reaper->Flags, EXT2_REAPER_FLAG_STOP))
|
|
break;
|
|
|
|
DidNothing = TRUE;
|
|
|
|
/* acquire global exclusive lock */
|
|
if (!ExAcquireResourceSharedLite(&Ext2Global->Resource, WaitLock)) {
|
|
continue;
|
|
}
|
|
GlobalAcquired = TRUE;
|
|
|
|
/* search all Vcb to get unused resources freed to system */
|
|
for (List = Ext2Global->VcbList.Flink;
|
|
List != &(Ext2Global->VcbList);
|
|
List = List->Flink ) {
|
|
|
|
Vcb = CONTAINING_RECORD(List, EXT2_VCB, Next);
|
|
|
|
Mcb = Ext2FirstUnusedMcb(Vcb, WaitLock, NumOfMcbs);
|
|
while (Mcb) {
|
|
PEXT2_MCB Next = Mcb->Next;
|
|
DEBUG(DL_RES, ( "Ext2ReaperThread: releasing Mcb (%p): %wZ"
|
|
" Total: %xh\n", Mcb, &Mcb->FullName,
|
|
Ext2Global->PerfStat.Current.Mcb));
|
|
Ext2FreeMcb(Vcb, Mcb);
|
|
Mcb = Next;
|
|
LastState = DidNothing = FALSE;
|
|
}
|
|
}
|
|
|
|
if (GlobalAcquired) {
|
|
ExReleaseResourceLite(&Ext2Global->Resource);
|
|
GlobalAcquired = FALSE;
|
|
}
|
|
}
|
|
|
|
} _SEH2_FINALLY {
|
|
|
|
if (GlobalAcquired) {
|
|
ExReleaseResourceLite(&Ext2Global->Resource);
|
|
}
|
|
|
|
KeSetEvent(&Reaper->Engine, 0, FALSE);
|
|
} _SEH2_END;
|
|
|
|
PsTerminateSystemThread(STATUS_SUCCESS);
|
|
}
|
|
|
|
|
|
/* get buffer heads from global Vcb BH list */
|
|
|
|
BOOLEAN
|
|
Ext2QueryUnusedBH(PEXT2_VCB Vcb, PLIST_ENTRY head)
|
|
{
|
|
struct buffer_head *bh = NULL;
|
|
PLIST_ENTRY next = NULL;
|
|
LARGE_INTEGER now;
|
|
BOOLEAN wake = FALSE;
|
|
|
|
KeQuerySystemTime(&now);
|
|
|
|
ExAcquireResourceExclusiveLite(&Vcb->bd.bd_bh_lock, TRUE);
|
|
|
|
while (!IsListEmpty(&Vcb->bd.bd_bh_free)) {
|
|
next = RemoveHeadList(&Vcb->bd.bd_bh_free);
|
|
bh = CONTAINING_RECORD(next, struct buffer_head, b_link);
|
|
if (atomic_read(&bh->b_count)) {
|
|
InitializeListHead(&bh->b_link);
|
|
/* to be inserted by brelse */
|
|
continue;
|
|
}
|
|
|
|
if ( IsFlagOn(Vcb->Flags, VCB_BEING_DROPPED) ||
|
|
(bh->b_ts_drop.QuadPart + (LONGLONG)10*1000*1000*15) > now.QuadPart ||
|
|
(bh->b_ts_creat.QuadPart + (LONGLONG)10*1000*1000*180) > now.QuadPart) {
|
|
InsertTailList(head, &bh->b_link);
|
|
} else {
|
|
InsertHeadList(&Vcb->bd.bd_bh_free, &bh->b_link);
|
|
break;
|
|
}
|
|
}
|
|
|
|
wake = IsListEmpty(&Vcb->bd.bd_bh_free);
|
|
ExReleaseResourceLite(&Vcb->bd.bd_bh_lock);
|
|
|
|
if (wake)
|
|
KeSetEvent(&Vcb->bd.bd_bh_notify, 0, FALSE);
|
|
|
|
return IsFlagOn(Vcb->Flags, VCB_BEING_DROPPED);
|
|
}
|
|
|
|
|
|
/* Reaper thread to release unused buffer heads */
|
|
VOID NTAPI
|
|
Ext2bhReaperThread(
|
|
PVOID Context
|
|
)
|
|
{
|
|
PEXT2_REAPER Reaper = Context;
|
|
PEXT2_VCB Vcb = NULL;
|
|
LIST_ENTRY List, *Link;
|
|
LARGE_INTEGER Timeout;
|
|
|
|
BOOLEAN GlobalAcquired = FALSE;
|
|
BOOLEAN DidNothing = FALSE;
|
|
BOOLEAN NonWait = FALSE;
|
|
|
|
_SEH2_TRY {
|
|
|
|
Reaper->Thread = PsGetCurrentThread();
|
|
|
|
/* wake up DirverEntry */
|
|
KeSetEvent(&Reaper->Engine, 0, FALSE);
|
|
|
|
/* now process looping */
|
|
while (!IsFlagOn(Reaper->Flags, EXT2_REAPER_FLAG_STOP)) {
|
|
|
|
/* wait until it is waken or it times out */
|
|
if (NonWait) {
|
|
Timeout.QuadPart = (LONGLONG)-10*1000*10;
|
|
NonWait = FALSE;
|
|
} else if (DidNothing) {
|
|
Timeout.QuadPart = Timeout.QuadPart * 2;
|
|
} else {
|
|
Timeout.QuadPart = (LONGLONG)-10*1000*1000*10; /* 10 seconds */
|
|
}
|
|
KeWaitForSingleObject(
|
|
&Reaper->Wait,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
&Timeout
|
|
);
|
|
|
|
if (IsFlagOn(Reaper->Flags, EXT2_REAPER_FLAG_STOP))
|
|
break;
|
|
|
|
InitializeListHead(&List);
|
|
|
|
/* acquire global exclusive lock */
|
|
ExAcquireResourceSharedLite(&Ext2Global->Resource, TRUE);
|
|
GlobalAcquired = TRUE;
|
|
/* search all Vcb to get unused resources freed to system */
|
|
for (Link = Ext2Global->VcbList.Flink;
|
|
Link != &(Ext2Global->VcbList);
|
|
Link = Link->Flink ) {
|
|
|
|
Vcb = CONTAINING_RECORD(Link, EXT2_VCB, Next);
|
|
NonWait = Ext2QueryUnusedBH(Vcb, &List);
|
|
}
|
|
if (GlobalAcquired) {
|
|
ExReleaseResourceLite(&Ext2Global->Resource);
|
|
GlobalAcquired = FALSE;
|
|
}
|
|
|
|
DidNothing = IsListEmpty(&List);
|
|
while (!IsListEmpty(&List)) {
|
|
struct buffer_head *bh;
|
|
Link = RemoveHeadList(&List);
|
|
bh = CONTAINING_RECORD(Link, struct buffer_head, b_link);
|
|
ASSERT(0 == atomic_read(&bh->b_count));
|
|
free_buffer_head(bh);
|
|
}
|
|
}
|
|
|
|
} _SEH2_FINALLY {
|
|
|
|
if (GlobalAcquired) {
|
|
ExReleaseResourceLite(&Ext2Global->Resource);
|
|
}
|
|
|
|
KeSetEvent(&Reaper->Engine, 0, FALSE);
|
|
} _SEH2_END;
|
|
|
|
PsTerminateSystemThread(STATUS_SUCCESS);
|
|
}
|
|
|
|
/* get unused Fcbs to free */
|
|
|
|
BOOLEAN
|
|
Ext2QueryUnusedFcb(PEXT2_VCB Vcb, PLIST_ENTRY list)
|
|
{
|
|
PEXT2_FCB Fcb;
|
|
PLIST_ENTRY next = NULL;
|
|
LARGE_INTEGER now;
|
|
|
|
ULONG count = 0;
|
|
ULONG tries = 0;
|
|
BOOLEAN wake = FALSE;
|
|
BOOLEAN retry = TRUE;
|
|
|
|
KeQuerySystemTime(&now);
|
|
|
|
ExAcquireResourceExclusiveLite(&Vcb->FcbLock, TRUE);
|
|
|
|
again:
|
|
|
|
while (!IsListEmpty(&Vcb->FcbList)) {
|
|
|
|
next = RemoveHeadList(&Vcb->FcbList);
|
|
Fcb = CONTAINING_RECORD(next, EXT2_FCB, Next);
|
|
|
|
if (Fcb->ReferenceCount > 0) {
|
|
InsertTailList(&Vcb->FcbList, &Fcb->Next);
|
|
break;
|
|
}
|
|
|
|
retry = FALSE;
|
|
|
|
if (now.QuadPart < Fcb->TsDrop.QuadPart + 10*1000*1000*120) {
|
|
InsertHeadList(&Vcb->FcbList, &Fcb->Next);
|
|
break;
|
|
}
|
|
|
|
Ext2UnlinkFcb(Fcb);
|
|
Ext2DerefXcb(&Vcb->FcbCount);
|
|
InsertTailList(list, &Fcb->Next);
|
|
if (++count >= Ext2Global->MaxDepth) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retry) {
|
|
if (++tries < (Vcb->FcbCount >> 4) )
|
|
goto again;
|
|
}
|
|
|
|
ExReleaseResourceLite(&Vcb->FcbLock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Reaper thread to release Fcb */
|
|
VOID NTAPI
|
|
Ext2FcbReaperThread(
|
|
PVOID Context
|
|
)
|
|
{
|
|
PEXT2_REAPER Reaper = Context;
|
|
PEXT2_VCB Vcb = NULL;
|
|
LIST_ENTRY List, *Link;
|
|
LARGE_INTEGER Timeout;
|
|
|
|
BOOLEAN GlobalAcquired = FALSE;
|
|
BOOLEAN DidNothing = FALSE;
|
|
BOOLEAN NonWait = FALSE;
|
|
|
|
_SEH2_TRY {
|
|
|
|
Reaper->Thread = PsGetCurrentThread();
|
|
|
|
/* wake up DirverEntry */
|
|
KeSetEvent(&Reaper->Engine, 0, FALSE);
|
|
|
|
/* now process looping */
|
|
while (!IsFlagOn(Reaper->Flags, EXT2_REAPER_FLAG_STOP)) {
|
|
|
|
/* wait until it is waken or it times out */
|
|
if (NonWait) {
|
|
Timeout.QuadPart = (LONGLONG)-10*1000*100;
|
|
NonWait = FALSE;
|
|
} else if (DidNothing) {
|
|
Timeout.QuadPart = Timeout.QuadPart * 2;
|
|
} else {
|
|
Timeout.QuadPart = (LONGLONG)-10*1000*1000*20; /* 20 seconds */
|
|
}
|
|
KeWaitForSingleObject(
|
|
&Reaper->Wait,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
&Timeout
|
|
);
|
|
|
|
if (IsFlagOn(Reaper->Flags, EXT2_REAPER_FLAG_STOP))
|
|
break;
|
|
|
|
InitializeListHead(&List);
|
|
|
|
/* acquire global exclusive lock */
|
|
ExAcquireResourceSharedLite(&Ext2Global->Resource, TRUE);
|
|
GlobalAcquired = TRUE;
|
|
/* search all Vcb to get unused resources freed to system */
|
|
for (Link = Ext2Global->VcbList.Flink;
|
|
Link != &(Ext2Global->VcbList);
|
|
Link = Link->Flink ) {
|
|
|
|
Vcb = CONTAINING_RECORD(Link, EXT2_VCB, Next);
|
|
NonWait = Ext2QueryUnusedFcb(Vcb, &List);
|
|
}
|
|
if (GlobalAcquired) {
|
|
ExReleaseResourceLite(&Ext2Global->Resource);
|
|
GlobalAcquired = FALSE;
|
|
}
|
|
|
|
DidNothing = IsListEmpty(&List);
|
|
while (!IsListEmpty(&List)) {
|
|
PEXT2_FCB Fcb;
|
|
Link = RemoveHeadList(&List);
|
|
Fcb = CONTAINING_RECORD(Link, EXT2_FCB, Next);
|
|
ASSERT(0 == Fcb->ReferenceCount);
|
|
Ext2FreeFcb(Fcb);
|
|
}
|
|
}
|
|
|
|
} _SEH2_FINALLY {
|
|
|
|
if (GlobalAcquired) {
|
|
ExReleaseResourceLite(&Ext2Global->Resource);
|
|
}
|
|
|
|
KeSetEvent(&Reaper->Engine, 0, FALSE);
|
|
} _SEH2_END;
|
|
|
|
PsTerminateSystemThread(STATUS_SUCCESS);
|
|
}
|
|
|
|
NTSTATUS
|
|
Ext2StartReaper(PEXT2_REAPER Reaper, EXT2_REAPER_RELEASE Free)
|
|
{
|
|
NTSTATUS status = STATUS_SUCCESS;
|
|
OBJECT_ATTRIBUTES oa;
|
|
HANDLE handle = 0;
|
|
LARGE_INTEGER timeout;
|
|
|
|
Reaper->Free = Free;
|
|
|
|
/* initialize wait event */
|
|
KeInitializeEvent(
|
|
&Reaper->Wait,
|
|
SynchronizationEvent, FALSE
|
|
);
|
|
|
|
/* Reaper thread engine event */
|
|
KeInitializeEvent(
|
|
&Reaper->Engine,
|
|
SynchronizationEvent, FALSE
|
|
);
|
|
|
|
/* initialize oa */
|
|
InitializeObjectAttributes(
|
|
&oa,
|
|
NULL,
|
|
OBJ_CASE_INSENSITIVE |
|
|
OBJ_KERNEL_HANDLE,
|
|
NULL,
|
|
NULL
|
|
);
|
|
|
|
/* start a new system thread */
|
|
status = PsCreateSystemThread(
|
|
&handle,
|
|
0,
|
|
&oa,
|
|
NULL,
|
|
NULL,
|
|
Free,
|
|
(PVOID)Reaper
|
|
);
|
|
|
|
if (NT_SUCCESS(status)) {
|
|
ZwClose(handle);
|
|
|
|
/* make sure Reaperthread is started */
|
|
timeout.QuadPart = (LONGLONG)-10*1000*1000*2; /* 2 seconds */
|
|
status = KeWaitForSingleObject(
|
|
&Reaper->Engine,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
&timeout
|
|
);
|
|
if (status != STATUS_SUCCESS) {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
VOID NTAPI
|
|
Ext2StopReaper(PEXT2_REAPER Reaper)
|
|
{
|
|
LARGE_INTEGER timeout;
|
|
|
|
Reaper->Flags |= EXT2_REAPER_FLAG_STOP;
|
|
KeSetEvent(&Reaper->Wait, 0, FALSE);
|
|
|
|
/* make sure Reaperthread is started */
|
|
timeout.QuadPart = (LONGLONG)-10*1000*1000*2; /* 2 seconds */
|
|
KeWaitForSingleObject(
|
|
&Reaper->Engine,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
&timeout);
|
|
}
|