+++ /dev/null
-/*
- * COPYRIGHT: See COPYRIGHT.TXT
- * PROJECT: Ext2 File System Driver for WinNT/2K/XP
- * FILE: memory.c
- * PROGRAMMER: Matt Wu <mattwu@163.com>
- * HOMEPAGE: http://www.ext2fsd.com
- * UPDATE HISTORY:
- */
-
-/* INCLUDES *****************************************************************/
-
-#include "ext2fs.h"
-
-/* GLOBALS ***************************************************************/
-
-extern PEXT2_GLOBAL Ext2Global;
-
-/* DEFINITIONS *************************************************************/
-
-#ifdef ALLOC_PRAGMA
-#pragma alloc_text(PAGE, Ext2AllocateInode)
-#pragma alloc_text(PAGE, Ext2DestroyInode)
-#pragma alloc_text(PAGE, Ext2CheckBitmapConsistency)
-#pragma alloc_text(PAGE, Ext2CheckSetBlock)
-#pragma alloc_text(PAGE, Ext2InitializeVcb)
-#pragma alloc_text(PAGE, Ext2TearDownStream)
-#pragma alloc_text(PAGE, Ext2DestroyVcb)
-#pragma alloc_text(PAGE, Ext2SyncUninitializeCacheMap)
-#pragma alloc_text(PAGE, Ext2ReaperThread)
-#pragma alloc_text(PAGE, Ext2StartReaper)
-#pragma alloc_text(PAGE, Ext2StopReaper)
-#endif
-
-PEXT2_IRP_CONTEXT
-Ext2AllocateIrpContext (IN PDEVICE_OBJECT DeviceObject,
- IN PIRP Irp )
-{
- PIO_STACK_LOCATION irpSp;
- PEXT2_IRP_CONTEXT IrpContext;
-
- ASSERT(DeviceObject != NULL);
- ASSERT(Irp != NULL);
-
- irpSp = IoGetCurrentIrpStackLocation(Irp);
-
- IrpContext = (PEXT2_IRP_CONTEXT) (
- ExAllocateFromNPagedLookasideList(
- &(Ext2Global->Ext2IrpContextLookasideList)));
-
- if (IrpContext == NULL) {
- return NULL;
- }
-
- RtlZeroMemory(IrpContext, sizeof(EXT2_IRP_CONTEXT) );
-
- IrpContext->Identifier.Type = EXT2ICX;
- IrpContext->Identifier.Size = sizeof(EXT2_IRP_CONTEXT);
-
- IrpContext->Irp = Irp;
- IrpContext->MajorFunction = irpSp->MajorFunction;
- IrpContext->MinorFunction = irpSp->MinorFunction;
- IrpContext->DeviceObject = DeviceObject;
- IrpContext->FileObject = irpSp->FileObject;
- if (NULL != IrpContext->FileObject) {
- IrpContext->Fcb = (PEXT2_FCB)IrpContext->FileObject->FsContext;
- IrpContext->Ccb = (PEXT2_CCB)IrpContext->FileObject->FsContext2;
- }
-
- if (IrpContext->FileObject != NULL) {
- IrpContext->RealDevice = IrpContext->FileObject->DeviceObject;
- } else if (IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL) {
- if (irpSp->Parameters.MountVolume.Vpb) {
- IrpContext->RealDevice = irpSp->Parameters.MountVolume.Vpb->RealDevice;
- }
- }
-
- if (IsFlagOn(irpSp->Flags, SL_WRITE_THROUGH)) {
- SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WRITE_THROUGH);
- }
-
- if (IsFlagOn(irpSp->Flags, SL_OVERRIDE_VERIFY_VOLUME)) {
- SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_VERIFY_READ);
- }
-
- if (IrpContext->MajorFunction == IRP_MJ_CLEANUP ||
- IrpContext->MajorFunction == IRP_MJ_CLOSE ||
- IrpContext->MajorFunction == IRP_MJ_SHUTDOWN ||
- IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL ||
- IrpContext->MajorFunction == IRP_MJ_PNP ) {
-
- if (IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL ||
- IrpContext->MajorFunction == IRP_MJ_PNP) {
- if (IoGetCurrentIrpStackLocation(Irp)->FileObject == NULL ||
- IoIsOperationSynchronous(Irp)) {
- SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
- }
- } else {
- SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
- }
-
- } else if (IoIsOperationSynchronous(Irp)) {
-
- SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
- }
-
- IrpContext->IsTopLevel = (IoGetTopLevelIrp() == Irp);
- IrpContext->ExceptionInProgress = FALSE;
- INC_IRP_COUNT(IrpContext);
-
- return IrpContext;
-}
-
-VOID
-Ext2FreeIrpContext (IN PEXT2_IRP_CONTEXT IrpContext)
-{
- ASSERT(IrpContext != NULL);
-
- ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
- (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
-
- /* free the IrpContext to NonPagedList */
- IrpContext->Identifier.Type = 0;
- IrpContext->Identifier.Size = 0;
-
- DEC_IRP_COUNT(IrpContext);
- ExFreeToNPagedLookasideList(&(Ext2Global->Ext2IrpContextLookasideList), IrpContext);
-}
-
-
-PEXT2_FCB
-Ext2AllocateFcb (
- IN PEXT2_VCB Vcb,
- IN PEXT2_MCB Mcb
-)
-{
- PEXT2_FCB Fcb;
-
- ASSERT(ExIsResourceAcquiredExclusiveLite(&Vcb->FcbLock));
-
- Fcb = (PEXT2_FCB) ExAllocateFromNPagedLookasideList(
- &(Ext2Global->Ext2FcbLookasideList));
-
- if (!Fcb) {
- return NULL;
- }
-
- RtlZeroMemory(Fcb, sizeof(EXT2_FCB));
- Fcb->Identifier.Type = EXT2FCB;
- Fcb->Identifier.Size = sizeof(EXT2_FCB);
-
-#ifndef _WIN2K_TARGET_
- ExInitializeFastMutex(&Fcb->Mutex);
- FsRtlSetupAdvancedHeader(&Fcb->Header, &Fcb->Mutex);
-#endif
-
- FsRtlInitializeOplock(&Fcb->Oplock);
- FsRtlInitializeFileLock (
- &Fcb->FileLockAnchor,
- NULL,
- NULL );
-
- Fcb->OpenHandleCount = 0;
- Fcb->ReferenceCount = 0;
- Fcb->Vcb = Vcb;
- Fcb->Inode = &Mcb->Inode;
-
- ASSERT(Mcb->Fcb == NULL);
- Ext2ReferMcb(Mcb);
- Fcb->Mcb = Mcb;
- Mcb->Fcb = Fcb;
-
- DEBUG(DL_RES, ("Ext2AllocateFcb: Fcb %p created: %wZ.\n",
- Fcb, &Fcb->Mcb->FullName));
-
- RtlZeroMemory(&Fcb->Header, sizeof(FSRTL_COMMON_FCB_HEADER));
- Fcb->Header.NodeTypeCode = (USHORT) EXT2FCB;
- Fcb->Header.NodeByteSize = sizeof(EXT2_FCB);
- Fcb->Header.IsFastIoPossible = FastIoIsNotPossible;
- Fcb->Header.Resource = &(Fcb->MainResource);
- Fcb->Header.PagingIoResource = &(Fcb->PagingIoResource);
-
- Fcb->Header.FileSize.QuadPart = Mcb->Inode.i_size;
- Fcb->Header.ValidDataLength.QuadPart = Mcb->Inode.i_size;
- Fcb->Header.AllocationSize.QuadPart = CEILING_ALIGNED(ULONGLONG,
- Fcb->Header.FileSize.QuadPart, (ULONGLONG)Vcb->BlockSize);
-
- Fcb->SectionObject.DataSectionObject = NULL;
- Fcb->SectionObject.SharedCacheMap = NULL;
- Fcb->SectionObject.ImageSectionObject = NULL;
-
- ExInitializeResourceLite(&(Fcb->MainResource));
- ExInitializeResourceLite(&(Fcb->PagingIoResource));
-
- Ext2InsertFcb(Vcb, Fcb);
-
- INC_MEM_COUNT(PS_FCB, Fcb, sizeof(EXT2_FCB));
-
- return Fcb;
-}
-
-VOID
-Ext2UnlinkFcb(IN PEXT2_FCB Fcb)
-{
- PEXT2_VCB Vcb = Fcb->Vcb;
- PEXT2_MCB Mcb;
-
- ExAcquireResourceExclusiveLite(&Vcb->McbLock, TRUE);
- Mcb = Fcb->Mcb;
-
- DEBUG(DL_ERR, ("Ext2FreeFcb: Fcb (%p) to be unlinked: %wZ.\n",
- Fcb, Mcb ? &Mcb->FullName : NULL));
-
- if ((Mcb != NULL) &&
- (Mcb->Identifier.Type == EXT2MCB) &&
- (Mcb->Identifier.Size == sizeof(EXT2_MCB))) {
-
- ASSERT (Mcb->Fcb == Fcb);
- if (IsMcbSpecialFile(Mcb) ||
- IsFileDeleted(Mcb)) {
-
- ASSERT(!IsRoot(Fcb));
- Ext2RemoveMcb(Vcb, Mcb);
- Mcb->Fcb = NULL;
-
- Ext2UnlinkMcb(Vcb, Mcb);
- Ext2DerefMcb(Mcb);
- Ext2LinkHeadMcb(Vcb, Mcb);
-
- } else {
- Mcb->Fcb = NULL;
- Ext2DerefMcb(Mcb);
- }
- Fcb->Mcb = NULL;
- }
-
- ExReleaseResourceLite(&Vcb->McbLock);
-}
-
-VOID
-Ext2FreeFcb (IN PEXT2_FCB Fcb)
-{
- PEXT2_VCB Vcb = Fcb->Vcb;
-
- _SEH2_TRY {
-
- ASSERT((Fcb != NULL) && (Fcb->Identifier.Type == EXT2FCB) &&
- (Fcb->Identifier.Size == sizeof(EXT2_FCB)));
- ASSERT(0 == Fcb->ReferenceCount);
-
-#ifndef _WIN2K_TARGET_
- FsRtlTeardownPerStreamContexts(&Fcb->Header);
-#endif
-
- FsRtlUninitializeFileLock(&Fcb->FileLockAnchor);
- FsRtlUninitializeOplock(&Fcb->Oplock);
- ExDeleteResourceLite(&Fcb->MainResource);
- ExDeleteResourceLite(&Fcb->PagingIoResource);
-
- Fcb->Identifier.Type = 0;
- Fcb->Identifier.Size = 0;
-
- ExFreeToNPagedLookasideList(&(Ext2Global->Ext2FcbLookasideList), Fcb);
- DEC_MEM_COUNT(PS_FCB, Fcb, sizeof(EXT2_FCB));
-
- if (0 == Ext2DerefXcb(&Vcb->ReferenceCount)) {
- if (!IsMounted(Vcb) || IsDispending(Vcb)) {
- Ext2CheckDismount(NULL, Vcb, FALSE);
- }
- }
-
- } _SEH2_FINALLY {
- } _SEH2_END;
-}
-
-VOID
-Ext2ReleaseFcb (IN PEXT2_FCB Fcb)
-{
- PEXT2_VCB Vcb = Fcb->Vcb;
- PEXT2_MCB Mcb;
-
- if (0 != Ext2DerefXcb(&Fcb->ReferenceCount))
- return;
-
- ExAcquireResourceExclusiveLite(&Vcb->FcbLock, TRUE);
- ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE);
-
- Mcb = Fcb->Mcb;
- RemoveEntryList(&Fcb->Next);
-
- if (IsFlagOn(Fcb->Flags, FCB_DELETE_PENDING) ||
- NULL == Mcb || IsFileDeleted(Mcb)) {
- InsertHeadList(&Vcb->FcbList, &Fcb->Next);
- Fcb->TsDrop.QuadPart = 0;
- } else {
- InsertTailList(&Vcb->FcbList, &Fcb->Next);
- KeQuerySystemTime(&Fcb->TsDrop);
- }
- ExReleaseResourceLite(&Fcb->MainResource);
- ExReleaseResourceLite(&Vcb->FcbLock);
-
- if ((Vcb->FcbCount >> 6) > (ULONG)(Ext2Global->MaxDepth)) {
- KeSetEvent(&Ext2Global->FcbReaper.Wait, 0, FALSE);
- }
-}
-
-/* Insert Fcb to Vcb->FcbList queue, with Vcb->FcbLock Acquired. */
-
-VOID
-Ext2InsertFcb(PEXT2_VCB Vcb, PEXT2_FCB Fcb)
-{
- ASSERT(ExIsResourceAcquiredExclusiveLite(&Vcb->FcbLock));
-
- KeQuerySystemTime(&Fcb->TsDrop);
- Ext2ReferXcb(&Vcb->FcbCount);
- Ext2ReferXcb(&Vcb->ReferenceCount);
- InsertTailList(&Vcb->FcbList, &Fcb->Next);
-}
-
-PEXT2_CCB
-Ext2AllocateCcb (ULONG Flags, PEXT2_MCB SymLink)
-{
- PEXT2_CCB Ccb;
-
- Ccb = (PEXT2_CCB) (ExAllocateFromNPagedLookasideList(
- &(Ext2Global->Ext2CcbLookasideList)));
- if (!Ccb) {
- return NULL;
- }
-
- DEBUG(DL_RES, ( "ExtAllocateCcb: Ccb created: %ph.\n", Ccb));
-
- RtlZeroMemory(Ccb, sizeof(EXT2_CCB));
-
- Ccb->Identifier.Type = EXT2CCB;
- Ccb->Identifier.Size = sizeof(EXT2_CCB);
- Ccb->Flags = Flags;
-
- Ccb->SymLink = SymLink;
- if (SymLink) {
- ASSERT(SymLink->Refercount > 0);
- Ext2ReferMcb(SymLink);
- DEBUG(DL_INF, ( "ExtAllocateCcb: Ccb SymLink: %wZ.\n",
- &Ccb->SymLink->FullName));
- }
-
- Ccb->DirectorySearchPattern.Length = 0;
- Ccb->DirectorySearchPattern.MaximumLength = 0;
- Ccb->DirectorySearchPattern.Buffer = 0;
-
- INC_MEM_COUNT(PS_CCB, Ccb, sizeof(EXT2_CCB));
-
- return Ccb;
-}
-
-VOID
-Ext2FreeCcb (IN PEXT2_VCB Vcb, IN PEXT2_CCB Ccb)
-{
- ASSERT(Ccb != NULL);
- ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
- (Ccb->Identifier.Size == sizeof(EXT2_CCB)));
-
- DEBUG(DL_RES, ( "Ext2FreeCcb: Ccb = %ph.\n", Ccb));
-
- if (Ccb->SymLink) {
- DEBUG(DL_INF, ( "Ext2FreeCcb: Ccb SymLink: %wZ.\n",
- &Ccb->SymLink->FullName));
- if (IsFileDeleted(Ccb->SymLink->Target)) {
- Ext2UnlinkMcb(Vcb, Ccb->SymLink);
- Ext2DerefMcb(Ccb->SymLink);
- Ext2LinkHeadMcb(Vcb, Ccb->SymLink);
- } else {
- Ext2DerefMcb(Ccb->SymLink);
- }
- }
-
- if (Ccb->DirectorySearchPattern.Buffer != NULL) {
- DEC_MEM_COUNT(PS_DIR_PATTERN, Ccb->DirectorySearchPattern.Buffer,
- Ccb->DirectorySearchPattern.MaximumLength );
- Ext2FreePool(Ccb->DirectorySearchPattern.Buffer, EXT2_DIRSP_MAGIC);
- }
-
- ExFreeToNPagedLookasideList(&(Ext2Global->Ext2CcbLookasideList), Ccb);
- DEC_MEM_COUNT(PS_CCB, Ccb, sizeof(EXT2_CCB));
-}
-
-PEXT2_INODE
-Ext2AllocateInode (PEXT2_VCB Vcb)
-{
- PVOID inode = NULL;
-
- inode = ExAllocateFromNPagedLookasideList(
- &(Vcb->InodeLookasideList));
- if (!inode) {
- return NULL;
- }
-
- RtlZeroMemory(inode, INODE_SIZE);
-
- DEBUG(DL_INF, ("ExtAllocateInode: Inode created: %ph.\n", inode));
- INC_MEM_COUNT(PS_EXT2_INODE, inode, INODE_SIZE);
-
- return inode;
-}
-
-VOID
-Ext2DestroyInode (IN PEXT2_VCB Vcb, IN PEXT2_INODE inode)
-{
- ASSERT(inode != NULL);
-
- DEBUG(DL_INF, ("Ext2FreeInode: Inode = %ph.\n", inode));
-
- ExFreeToNPagedLookasideList(&(Vcb->InodeLookasideList), inode);
- DEC_MEM_COUNT(PS_EXT2_INODE, inode, INODE_SIZE);
-}
-
-struct dentry * Ext2AllocateEntry()
-{
- struct dentry *de;
-
- de = (struct dentry *)ExAllocateFromNPagedLookasideList(
- &(Ext2Global->Ext2DentryLookasideList));
- if (!de) {
- return NULL;
- }
-
- RtlZeroMemory(de, sizeof(struct dentry));
- INC_MEM_COUNT(PS_DENTRY, de, sizeof(struct dentry));
-
- return de;
-}
-
-VOID Ext2FreeEntry (IN struct dentry *de)
-{
- ASSERT(de != NULL);
-
- if (de->d_name.name)
- ExFreePool(de->d_name.name);
-
- ExFreeToNPagedLookasideList(&(Ext2Global->Ext2DentryLookasideList), de);
- DEC_MEM_COUNT(PS_DENTRY, de, sizeof(struct dentry));
-}
-
-
-struct dentry *Ext2BuildEntry(PEXT2_VCB Vcb, PEXT2_MCB Dcb, PUNICODE_STRING FileName)
-{
- OEM_STRING Oem = { 0 };
- struct dentry *de = NULL;
- NTSTATUS Status = STATUS_INSUFFICIENT_RESOURCES;
-
- _SEH2_TRY {
-
- de = Ext2AllocateEntry();
- if (!de) {
- DEBUG(DL_ERR, ("Ext2BuildEntry: failed to allocate dentry.\n"));
- _SEH2_LEAVE;
- }
- de->d_sb = &Vcb->sb;
- if (Dcb)
- de->d_parent = Dcb->de;
-
- Oem.MaximumLength = (USHORT)Ext2UnicodeToOEMSize(Vcb, FileName) + 1;
- Oem.Buffer = ExAllocatePool(PagedPool, Oem.MaximumLength);
- if (!Oem.Buffer) {
- DEBUG(DL_ERR, ( "Ex2BuildEntry: failed to allocate OEM name.\n"));
- _SEH2_LEAVE;
- }
- de->d_name.name = Oem.Buffer;
- RtlZeroMemory(Oem.Buffer, Oem.MaximumLength);
- Status = Ext2UnicodeToOEM(Vcb, &Oem, FileName);
- if (!NT_SUCCESS(Status)) {
- DEBUG(DL_CP, ("Ext2BuildEntry: failed to convert %S to OEM.\n", FileName->Buffer));
- _SEH2_LEAVE;
- }
- de->d_name.len = Oem.Length;
-
- } _SEH2_FINALLY {
-
- if (!NT_SUCCESS(Status)) {
- if (de)
- Ext2FreeEntry(de);
- }
- } _SEH2_END;
-
- return de;
-}
-
-PEXT2_EXTENT
-Ext2AllocateExtent ()
-{
- PEXT2_EXTENT Extent;
-
- Extent = (PEXT2_EXTENT)ExAllocateFromNPagedLookasideList(
- &(Ext2Global->Ext2ExtLookasideList));
- if (!Extent) {
- return NULL;
- }
-
- 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);
-}
projects / reactos.git / blobdiff