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981 lines
36 KiB
C++
981 lines
36 KiB
C++
////////////////////////////////////////////////////////////////////
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// Copyright (C) Alexander Telyatnikov, Ivan Keliukh, Yegor Anchishkin, SKIF Software, 1999-2013. Kiev, Ukraine
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// All rights reserved
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// This file was released under the GPLv2 on June 2015.
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////////////////////////////////////////////////////////////////////
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/*
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Module Name: VerfySup.cpp
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Abstract:
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This module implements the UDF verification routines.
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Environment:
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Kernel mode only
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*/
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#include "udffs.h"
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// define the file specific bug-check id
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#define UDF_BUG_CHECK_ID UDF_FILE_VERIFY_FS_CONTROL
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/*
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Routine Description:
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This routine checks that the current Vcb is valid and currently mounted
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on the device. It will raise on an error condition.
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We check whether the volume needs verification and the current state
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of the Vcb.
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Arguments:
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Vcb - This is the volume to verify.
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*/
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NTSTATUS
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UDFVerifyVcb(
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IN PtrUDFIrpContext IrpContext,
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IN PVCB Vcb
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)
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{
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NTSTATUS RC = STATUS_SUCCESS;
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IO_STATUS_BLOCK Iosb;
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ULONG MediaChangeCount = 0;
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BOOLEAN Nop = TRUE;
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BOOLEAN UnsafeIoctl = (Vcb->VCBFlags & UDF_VCB_FLAGS_UNSAFE_IOCTL) ? TRUE : FALSE;
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UDFPrint(("UDFVerifyVCB: Modified=%d\n", Vcb->Modified));
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// Fail immediately if the volume is in the progress of being dismounted
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// or has been marked invalid.
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if (Vcb->VCBFlags & UDF_VCB_FLAGS_BEING_DISMOUNTED) {
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return STATUS_FILE_INVALID;
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}
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// If the media is removable and the verify volume flag in the
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// device object is not set then we want to ping the device
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// to see if it needs to be verified
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if ( (Vcb->VCBFlags & UDF_VCB_FLAGS_REMOVABLE_MEDIA) &&
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!(Vcb->Vpb->RealDevice->Flags & DO_VERIFY_VOLUME) &&
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(!(Vcb->VCBFlags & UDF_VCB_FLAGS_MEDIA_LOCKED) || UnsafeIoctl) ) {
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UDFPrint(("UDFVerifyVCB: UnsafeIoctl=%d, locked=%d\n", UnsafeIoctl, (Vcb->VCBFlags & UDF_VCB_FLAGS_MEDIA_LOCKED) ? 0 : 1));
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Vcb->VCBFlags &= ~UDF_VCB_FLAGS_UNSAFE_IOCTL;
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RC = UDFTSendIOCTL( IOCTL_STORAGE_CHECK_VERIFY,
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Vcb,
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NULL,0,
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&MediaChangeCount,sizeof(ULONG),
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FALSE,&Iosb );
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// Be safe about the count in case the driver didn't fill it in
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if (Iosb.Information != sizeof(ULONG)) MediaChangeCount = 0;
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UDFPrint((" MediaChangeCount %d -> %d\n", Vcb->MediaChangeCount, MediaChangeCount));
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// If the volume is now an empty device, or we have receieved a
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// bare STATUS_VERIFY_REQUIRED (various hardware conditions such
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// as bus resets, etc., will trigger this in the drivers), or the
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// media change count has moved since we last inspected the device,
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// then mark the volume to be verified.
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if ( (RC == STATUS_VERIFY_REQUIRED) ||
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(UDFIsRawDevice(RC) && (Vcb->VCBFlags & UDF_VCB_FLAGS_VOLUME_MOUNTED)) ||
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(NT_SUCCESS(RC) && (Vcb->MediaChangeCount != MediaChangeCount)) ||
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UnsafeIoctl) {
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UDFPrint((" set DO_VERIFY_VOLUME\n"));
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Vcb->Vpb->RealDevice->Flags |= DO_VERIFY_VOLUME;
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// If the volume is not mounted and we got a media change count,
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// update the Vcb so we do not trigger a verify again at this
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// count value. If the verify->mount path detects that the media
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// has actually changed and this Vcb is valid again, this will have
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// done nothing. We are already synchronized since the caller has
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// the Vcb.
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if (!(Vcb->VCBFlags & UDF_VCB_FLAGS_VOLUME_MOUNTED) &&
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NT_SUCCESS(RC) ) {
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Vcb->MediaChangeCount = MediaChangeCount;
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}
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} else if (!NT_SUCCESS(RC)) {
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// Vcb->Vpb->RealDevice->Flags |= DO_VERIFY_VOLUME;
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UDFPrint((" UDFNormalizeAndRaiseStatus(%x)\n", RC));
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UDFNormalizeAndRaiseStatus(IrpContext,RC);
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ASSERT(Nop);
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}
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}
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UDFPrint(("UDFVerifyVCB: Modified=%d\n", Vcb->Modified));
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// The Vcb may be mounted but the underlying real device may need to be verified.
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// If it does then we'll set the Iosb in the irp to be our real device
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if (Vcb->Vpb->RealDevice->Flags & DO_VERIFY_VOLUME) {
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UDFPrint((" DO_VERIFY_VOLUME -> IoSetHardErrorOrVerifyDevice()\n"));
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IoSetHardErrorOrVerifyDevice( IrpContext->Irp,
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Vcb->Vpb->RealDevice );
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RC = STATUS_VERIFY_REQUIRED;
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UDFPrint((" UDFRaiseStatus()\n"));
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UDFRaiseStatus(IrpContext, RC);
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ASSERT(Nop);
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}
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UDFPrint(("UDFVerifyVCB: Modified=%d\n", Vcb->Modified));
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if (!(Vcb->VCBFlags & UDF_VCB_FLAGS_VOLUME_MOUNTED)) {
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UDFPrint((" !UDF_VCB_FLAGS_VOLUME_MOUNTED -> IoSetHardErrorOrVerifyDevice()\n"));
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Vcb->Vpb->RealDevice->Flags |= DO_VERIFY_VOLUME;
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IoSetHardErrorOrVerifyDevice( IrpContext->Irp, Vcb->Vpb->RealDevice );
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RC = STATUS_WRONG_VOLUME;
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UDFPrint((" UDFRaiseStatus()\n"));
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UDFRaiseStatus(IrpContext, RC);
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// UDFRaiseStatus(IrpContext, STATUS_UNRECOGNIZED_VOLUME);
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ASSERT(Nop);
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}
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if ((Vcb->VCBFlags & UDF_VCB_FLAGS_BEING_DISMOUNTED)) {
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UDFPrint((" UDF_VCB_FLAGS_BEING_DISMOUNTED\n"));
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RC = STATUS_FILE_INVALID;
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UDFRaiseStatus( IrpContext, RC );
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ASSERT(Nop);
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}
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UDFPrint(("UDFVerifyVcb: RC = %x\n", RC));
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return RC;
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} // end UDFVerifyVcb()
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/*
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Routine Description:
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This routine performs the verify volume operation. It is responsible for
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either completing of enqueuing the input Irp.
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Arguments:
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Irp - Supplies the Irp to process
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Return Value:
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NTSTATUS - The return status for the operation
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--*/
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NTSTATUS
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UDFVerifyVolume(
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IN PIRP Irp
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)
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{
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PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( Irp );
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PVPB Vpb = IrpSp->Parameters.VerifyVolume.Vpb;
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PVCB Vcb = (PVCB)IrpSp->Parameters.VerifyVolume.DeviceObject->DeviceExtension;
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PVCB NewVcb = NULL;
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IO_STATUS_BLOCK Iosb;
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ULONG MediaChangeCount = 0;
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NTSTATUS RC;
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ULONG Mode;
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BOOLEAN UnsafeIoctl = (Vcb->VCBFlags & UDF_VCB_FLAGS_UNSAFE_IOCTL) ? TRUE : FALSE;
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// Update the real device in the IrpContext from the Vpb. There was no available
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// file object when the IrpContext was created.
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// IrpContext->RealDevice = Vpb->RealDevice;
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UDFPrint(("UDFVerifyVolume:\n"));
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// Acquire shared global access, the termination handler for the
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// following try statement will free the access.
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UDFAcquireResourceShared(&(UDFGlobalData.GlobalDataResource),TRUE);
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UDFAcquireResourceExclusive(&(Vcb->VCBResource),TRUE);
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_SEH2_TRY {
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UDFPrint(("UDFVerifyVolume: Modified=%d\n", Vcb->Modified));
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// Check if the real device still needs to be verified. If it doesn't
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// then obviously someone beat us here and already did the work
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// so complete the verify irp with success. Otherwise reenable
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// the real device and get to work.
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if( !(Vpb->RealDevice->Flags & DO_VERIFY_VOLUME) &&
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((Vcb->VCBFlags & UDF_VCB_FLAGS_MEDIA_LOCKED) && !UnsafeIoctl) ) {
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UDFPrint(("UDFVerifyVolume: STATUS_SUCCESS (1)\n"));
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try_return(RC = STATUS_SUCCESS);
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}
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Vcb->VCBFlags &= ~UDF_VCB_FLAGS_UNSAFE_IOCTL;
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// Verify that there is a disk here.
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RC = UDFPhSendIOCTL( IOCTL_STORAGE_CHECK_VERIFY,
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Vcb->TargetDeviceObject,
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NULL,0,
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&MediaChangeCount,sizeof(ULONG),
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TRUE,&Iosb );
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if(!NT_SUCCESS( RC )) {
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// If we will allow a raw mount then return WRONG_VOLUME to
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// allow the volume to be mounted by raw.
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if(FlagOn( IrpSp->Flags, SL_ALLOW_RAW_MOUNT )) {
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UDFPrint(("UDFVerifyVolume: STATUS_WRONG_VOLUME (1)\n"));
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RC = STATUS_WRONG_VOLUME;
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}
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if(UDFIsRawDevice(RC)) {
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UDFPrint(("UDFVerifyVolume: STATUS_WRONG_VOLUME (2)\n"));
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RC = STATUS_WRONG_VOLUME;
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}
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try_return( RC );
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}
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if(Iosb.Information != sizeof(ULONG)) {
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// Be safe about the count in case the driver didn't fill it in
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MediaChangeCount = 0;
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}
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UDFPrint(("UDFVerifyVolume: Modified=%d\n", Vcb->Modified));
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UDFPrint(("UDFVerifyVolume: MediaChangeCount=%x, Vcb->MediaChangeCount=%x, UnsafeIoctl=%x\n",
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MediaChangeCount, Vcb->MediaChangeCount, UnsafeIoctl));
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// Verify that the device actually saw a change. If the driver does not
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// support the MCC, then we must verify the volume in any case.
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if(MediaChangeCount == 0 ||
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(Vcb->MediaChangeCount != MediaChangeCount) ||
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UnsafeIoctl ) {
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UDFPrint(("UDFVerifyVolume: compare\n"));
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NewVcb = (PVCB)MyAllocatePool__(NonPagedPool,sizeof(VCB));
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if(!NewVcb)
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try_return(RC=STATUS_INSUFFICIENT_RESOURCES);
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RtlZeroMemory(NewVcb,sizeof(VCB));
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NewVcb->TargetDeviceObject = Vcb->TargetDeviceObject;
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NewVcb->Vpb = Vpb;
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// Set the removable media flag based on the real device's
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// characteristics
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if(Vpb->RealDevice->Characteristics & FILE_REMOVABLE_MEDIA) {
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UDFSetFlag( NewVcb->VCBFlags, UDF_VCB_FLAGS_REMOVABLE_MEDIA );
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}
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RC = UDFGetDiskInfo(NewVcb->TargetDeviceObject,NewVcb);
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if(!NT_SUCCESS(RC)) try_return(RC);
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// Prevent modification attempts durring Verify
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NewVcb->VCBFlags |= UDF_VCB_FLAGS_VOLUME_READ_ONLY |
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UDF_VCB_FLAGS_MEDIA_READ_ONLY;
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// Compare physical parameters (phase 1)
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UDFPrint(("UDFVerifyVolume: Modified=%d\n", Vcb->Modified));
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RC = UDFCompareVcb(Vcb,NewVcb, TRUE);
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if(!NT_SUCCESS(RC)) try_return(RC);
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if((Vcb->VCBFlags & UDF_VCB_FLAGS_RAW_DISK) &&
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Vcb->MountPhErrorCount > MOUNT_ERR_THRESHOLD ) {
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UDFPrint(("UDFVerifyVolume: it was very BAD volume. Do not perform Logical check\n"));
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goto skip_logical_check;
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}
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// Initialize internal cache
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// in *** READ ONLY *** mode
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Mode = WCACHE_MODE_ROM;
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RC = WCacheInit__(&(NewVcb->FastCache),
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UDFGlobalData.WCacheMaxFrames,
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UDFGlobalData.WCacheMaxBlocks,
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NewVcb->WriteBlockSize,
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5, NewVcb->BlockSizeBits,
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UDFGlobalData.WCacheBlocksPerFrameSh,
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0/*NewVcb->FirstLBA*/, NewVcb->LastPossibleLBA, Mode,
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/*WCACHE_CACHE_WHOLE_PACKET*/ 0 |
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(Vcb->DoNotCompareBeforeWrite ? WCACHE_DO_NOT_COMPARE : 0) |
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WCACHE_MARK_BAD_BLOCKS | WCACHE_RO_BAD_BLOCKS, // speed up mount on bad disks
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UDFGlobalData.WCacheFramesToKeepFree,
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UDFTWrite, UDFTRead,
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#ifdef UDF_ASYNC_IO
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UDFTWriteAsync, UDFTReadAsync,
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#else //UDF_ASYNC_IO
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NULL, NULL,
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#endif //UDF_ASYNC_IO
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UDFIsBlockAllocated, UDFUpdateVAT,
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UDFWCacheErrorHandler);
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if(!NT_SUCCESS(RC)) try_return(RC);
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UDFPrint(("UDFVerifyVolume: Modified=%d\n", Vcb->Modified));
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RC = UDFGetDiskInfoAndVerify(NewVcb->TargetDeviceObject,NewVcb);
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UDFPrint((" NewVcb->NSRDesc=%x\n", NewVcb->NSRDesc));
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if(!NT_SUCCESS(RC)) {
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if((Vcb->VCBFlags & UDF_VCB_FLAGS_RAW_DISK) &&
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(NewVcb->VCBFlags & UDF_VCB_FLAGS_RAW_DISK) &&
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!(NewVcb->NSRDesc & VRS_ISO9660_FOUND)) {
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UDFPrint(("UDFVerifyVolume: both are RAW -> remount\n", Vcb->Modified));
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RC = STATUS_SUCCESS;
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goto skip_logical_check;
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}
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if(RC == STATUS_UNRECOGNIZED_VOLUME) {
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try_return(RC = STATUS_WRONG_VOLUME);
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}
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try_return(RC);
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}
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WCacheChFlags__(&(Vcb->FastCache),
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WCACHE_CACHE_WHOLE_PACKET, // enable cache whole packet
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WCACHE_MARK_BAD_BLOCKS | WCACHE_RO_BAD_BLOCKS); // let user retry request on Bad Blocks
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NewVcb->VCBFlags |= UDF_VCB_FLAGS_VOLUME_MOUNTED;
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// Compare logical parameters (phase 2)
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UDFPrint(("UDFVerifyVolume: Modified=%d\n", Vcb->Modified));
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RC = UDFCompareVcb(Vcb,NewVcb, FALSE);
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if(!NT_SUCCESS(RC)) try_return(RC);
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// We have unitialized WCache, so it is better to
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// force MOUNT_VOLUME call
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if(!WCacheIsInitialized__(&(Vcb->FastCache)))
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try_return(RC = STATUS_WRONG_VOLUME);
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skip_logical_check:;
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}
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UDFPrint(("UDFVerifyVolume: compared\n"));
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UDFPrint(("UDFVerifyVolume: Modified=%d\n", Vcb->Modified));
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if(!(Vcb->VCBFlags & UDF_VCB_FLAGS_VOLUME_LOCKED)) {
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UDFPrint(("UDFVerifyVolume: set UDF_VCB_FLAGS_VOLUME_MOUNTED\n"));
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Vcb->VCBFlags |= UDF_VCB_FLAGS_VOLUME_MOUNTED;
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Vcb->SoftEjectReq = FALSE;
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}
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UDFClearFlag( Vpb->RealDevice->Flags, DO_VERIFY_VOLUME );
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try_exit: NOTHING;
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} _SEH2_FINALLY {
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// Update the media change count to note that we have verified the volume
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// at this value
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Vcb->MediaChangeCount = MediaChangeCount;
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// If we got the wrong volume, mark the Vcb as not mounted.
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if(RC == STATUS_WRONG_VOLUME) {
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UDFPrint(("UDFVerifyVolume: clear UDF_VCB_FLAGS_VOLUME_MOUNTED\n"));
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Vcb->VCBFlags &= ~UDF_VCB_FLAGS_VOLUME_MOUNTED;
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Vcb->WriteSecurity = FALSE;
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// ASSERT(!(Vcb->EjectWaiter));
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if(Vcb->EjectWaiter) {
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UDFReleaseResource(&(Vcb->VCBResource));
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UDFStopEjectWaiter(Vcb);
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UDFAcquireResourceExclusive(&(Vcb->VCBResource),TRUE);
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}
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} else
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if(NT_SUCCESS(RC) &&
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(Vcb->VCBFlags & UDF_VCB_FLAGS_VOLUME_MOUNTED)){
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BOOLEAN CacheInitialized = FALSE;
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UDFPrint((" !!! VerifyVolume - QUICK REMOUNT !!!\n"));
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// Initialize internal cache
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CacheInitialized = WCacheIsInitialized__(&(Vcb->FastCache));
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if(!CacheInitialized) {
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Mode = WCACHE_MODE_ROM;
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RC = WCacheInit__(&(Vcb->FastCache),
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Vcb->WCacheMaxFrames,
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Vcb->WCacheMaxBlocks,
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Vcb->WriteBlockSize,
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5, Vcb->BlockSizeBits,
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Vcb->WCacheBlocksPerFrameSh,
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0/*Vcb->FirstLBA*/, Vcb->LastPossibleLBA, Mode,
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/*WCACHE_CACHE_WHOLE_PACKET*/ 0 |
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(Vcb->DoNotCompareBeforeWrite ? WCACHE_DO_NOT_COMPARE : 0) |
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(Vcb->CacheChainedIo ? WCACHE_CHAINED_IO : 0),
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Vcb->WCacheFramesToKeepFree,
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// UDFTWrite, UDFTRead,
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UDFTWriteVerify, UDFTReadVerify,
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#ifdef UDF_ASYNC_IO
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UDFTWriteAsync, UDFTReadAsync,
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#else //UDF_ASYNC_IO
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NULL, NULL,
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#endif //UDF_ASYNC_IO
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UDFIsBlockAllocated, UDFUpdateVAT,
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UDFWCacheErrorHandler);
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}
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if(NT_SUCCESS(RC)) {
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if(!Vcb->VerifyCtx.VInited) {
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RC = UDFVInit(Vcb);
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}
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}
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if(NT_SUCCESS(RC)) {
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if(!CacheInitialized) {
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if(!(Vcb->VCBFlags & UDF_VCB_FLAGS_MEDIA_READ_ONLY)) {
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if(!Vcb->CDR_Mode) {
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if((Vcb->TargetDeviceObject->DeviceType == FILE_DEVICE_DISK) ||
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CdrwMediaClassEx_IsRAM(Vcb->MediaClassEx)) {
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UDFPrint(("UDFMountVolume: RAM mode\n"));
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Mode = WCACHE_MODE_RAM;
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} else {
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UDFPrint(("UDFMountVolume: RW mode\n"));
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Mode = WCACHE_MODE_RW;
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}
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/* if(FsDeviceType == FILE_DEVICE_CD_ROM_FILE_SYSTEM) {
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} else {
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Vcb->WriteSecurity = TRUE;
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}*/
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} else {
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Mode = WCACHE_MODE_R;
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}
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}
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WCacheSetMode__(&(Vcb->FastCache), Mode);
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WCacheChFlags__(&(Vcb->FastCache),
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WCACHE_CACHE_WHOLE_PACKET, // enable cache whole packet
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WCACHE_MARK_BAD_BLOCKS | WCACHE_RO_BAD_BLOCKS); // let user retry request on Bad Blocks
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}
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// we can't record ACL on old format disks
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if(!UDFNtAclSupported(Vcb)) {
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Vcb->WriteSecurity = FALSE;
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Vcb->UseExtendedFE = FALSE;
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}
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UDFPrint(("UDFVerifyVolume: try start EjectWaiter\n"));
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RC = UDFStartEjectWaiter(Vcb);
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if(!NT_SUCCESS(RC)) {
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UDFPrint(("UDFVerifyVolume: start EjectWaiter failed\n"));
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Vcb->VCBFlags &= ~UDF_VCB_FLAGS_VOLUME_MOUNTED;
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Vcb->WriteSecurity = FALSE;
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}
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}
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}
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if(NewVcb) {
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// Release internal cache
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UDFPrint(("UDFVerifyVolume: delete NewVcb\n"));
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WCacheFlushAll__(&(NewVcb->FastCache),NewVcb);
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WCacheRelease__(&(NewVcb->FastCache));
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ASSERT(!(NewVcb->EjectWaiter));
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// Waiter thread should be already stopped
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// if MediaChangeCount have changed
|
|
ASSERT(!(Vcb->EjectWaiter));
|
|
|
|
UDFCleanupVCB(NewVcb);
|
|
MyFreePool__(NewVcb);
|
|
}
|
|
UDFReleaseResource(&(Vcb->VCBResource));
|
|
UDFReleaseResource(&(UDFGlobalData.GlobalDataResource));
|
|
} _SEH2_END;
|
|
|
|
// Complete the request if no exception.
|
|
Irp->IoStatus.Information = 0;
|
|
|
|
Irp->IoStatus.Status = RC;
|
|
IoCompleteRequest(Irp,IO_DISK_INCREMENT);
|
|
|
|
UDFPrint(("UDFVerifyVolume: RC = %x\n", RC));
|
|
|
|
return RC;
|
|
} // end UDFVerifyVolume ()
|
|
|
|
/*
|
|
Routine Description:
|
|
|
|
This routines performs an IoVerifyVolume operation and takes the
|
|
appropriate action. If the verify is successful then we send the originating
|
|
Irp off to an Ex Worker Thread. This routine is called from the exception handler.
|
|
No file system resources are held when this routine is called.
|
|
|
|
Arguments:
|
|
|
|
Irp - The irp to send off after all is well and done.
|
|
Device - The real device needing verification.
|
|
|
|
*/
|
|
NTSTATUS
|
|
UDFPerformVerify(
|
|
IN PtrUDFIrpContext IrpContext,
|
|
IN PIRP Irp,
|
|
IN PDEVICE_OBJECT DeviceToVerify
|
|
)
|
|
{
|
|
|
|
PVCB Vcb;
|
|
NTSTATUS RC = STATUS_SUCCESS;
|
|
PIO_STACK_LOCATION IrpSp;
|
|
|
|
UDFPrint(("UDFPerformVerify:\n"));
|
|
if(!IrpContext) return STATUS_INVALID_PARAMETER;
|
|
if(!Irp) return STATUS_INVALID_PARAMETER;
|
|
|
|
// Check if this Irp has a status of Verify required and if it does
|
|
// then call the I/O system to do a verify.
|
|
//
|
|
// Skip the IoVerifyVolume if this is a mount or verify request
|
|
// itself. Trying a recursive mount will cause a deadlock with
|
|
// the DeviceObject->DeviceLock.
|
|
if ((IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL) &&
|
|
((IrpContext->MinorFunction == IRP_MN_MOUNT_VOLUME) ||
|
|
(IrpContext->MinorFunction == IRP_MN_VERIFY_VOLUME))) {
|
|
|
|
return UDFPostRequest(IrpContext, Irp);
|
|
}
|
|
|
|
// Extract a pointer to the Vcb from the VolumeDeviceObject.
|
|
// Note that since we have specifically excluded mount,
|
|
// requests, we know that IrpSp->DeviceObject is indeed a
|
|
// volume device object.
|
|
|
|
IrpSp = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
Vcb = (PVCB)IrpSp->DeviceObject->DeviceExtension;
|
|
|
|
UDFPrint(("UDFPerformVerify: check\n"));
|
|
// Check if the volume still thinks it needs to be verified,
|
|
// if it doesn't then we can skip doing a verify because someone
|
|
// else beat us to it.
|
|
_SEH2_TRY {
|
|
|
|
if (DeviceToVerify->Flags & DO_VERIFY_VOLUME) {
|
|
|
|
// If the IopMount in IoVerifyVolume did something, and
|
|
// this is an absolute open, force a reparse.
|
|
RC = IoVerifyVolume( DeviceToVerify, FALSE );
|
|
|
|
// Bug?
|
|
/* if (UDFIsRawDevice(RC)) {
|
|
RC = STATUS_WRONG_VOLUME;
|
|
}*/
|
|
|
|
// If the verify operation completed it will return
|
|
// either STATUS_SUCCESS or STATUS_WRONG_VOLUME, exactly.
|
|
if (RC == STATUS_SUCCESS) {
|
|
IrpContext->IrpContextFlags &= ~UDF_IRP_CONTEXT_EXCEPTION;
|
|
}
|
|
// If UDFVerifyVolume encountered an error during
|
|
// processing, it will return that error. If we got
|
|
// STATUS_WRONG_VOLUME from the verify, and our volume
|
|
// is now mounted, commute the status to STATUS_SUCCESS.
|
|
if ((RC == STATUS_WRONG_VOLUME) &&
|
|
(Vcb->VCBFlags & UDF_VCB_FLAGS_VOLUME_MOUNTED)) {
|
|
RC = STATUS_SUCCESS;
|
|
}
|
|
|
|
// Do a quick unprotected check here. The routine will do
|
|
// a safe check. After here we can release the resource.
|
|
// Note that if the volume really went away, we will be taking
|
|
// the Reparse path.
|
|
|
|
// If the device might need to go away then call our dismount routine.
|
|
if ( (!(Vcb->VCBFlags & UDF_VCB_FLAGS_VOLUME_MOUNTED) ||
|
|
(Vcb->VCBFlags & UDF_VCB_FLAGS_BEING_DISMOUNTED)) &&
|
|
(Vcb->VCBOpenCount <= UDF_RESIDUAL_REFERENCE) )
|
|
{
|
|
UDFPrint(("UDFPerformVerify: UDFCheckForDismount\n"));
|
|
UDFAcquireResourceExclusive(&(UDFGlobalData.GlobalDataResource), TRUE);
|
|
UDFCheckForDismount( IrpContext, Vcb, FALSE );
|
|
UDFReleaseResource(&(UDFGlobalData.GlobalDataResource));
|
|
}
|
|
|
|
// If this is a create and the verify succeeded then complete the
|
|
// request with a REPARSE status.
|
|
if ((IrpContext->MajorFunction == IRP_MJ_CREATE) &&
|
|
(IrpSp->FileObject->RelatedFileObject == NULL) &&
|
|
((RC == STATUS_SUCCESS) || (RC == STATUS_WRONG_VOLUME)) ) {
|
|
|
|
UDFPrint(("UDFPerformVerify: IO_REMOUNT\n"));
|
|
|
|
Irp->IoStatus.Information = IO_REMOUNT;
|
|
|
|
Irp->IoStatus.Status = STATUS_REPARSE;
|
|
IoCompleteRequest(Irp,IO_DISK_INCREMENT);
|
|
|
|
UDFReleaseIrpContext(IrpContext);
|
|
|
|
RC = STATUS_REPARSE;
|
|
Irp = NULL;
|
|
IrpContext = NULL;
|
|
|
|
// If there is still an error to process then call the Io system
|
|
// for a popup.
|
|
} else if ((Irp != NULL) && !NT_SUCCESS( RC )) {
|
|
|
|
UDFPrint(("UDFPerformVerify: check IoIsErrorUserInduced\n"));
|
|
// Fill in the device object if required.
|
|
if (IoIsErrorUserInduced( RC ) ) {
|
|
IoSetHardErrorOrVerifyDevice( Irp, DeviceToVerify );
|
|
}
|
|
UDFPrint(("UDFPerformVerify: UDFNormalizeAndRaiseStatus\n"));
|
|
UDFNormalizeAndRaiseStatus( IrpContext, RC );
|
|
}
|
|
}
|
|
|
|
// If there is still an Irp, send it off to an Ex Worker thread.
|
|
if (IrpContext != NULL) {
|
|
|
|
RC = UDFPostRequest( IrpContext, Irp );
|
|
}
|
|
|
|
} _SEH2_EXCEPT(UDFExceptionFilter( IrpContext, _SEH2_GetExceptionInformation())) {
|
|
// We had some trouble trying to perform the verify or raised
|
|
// an error ourselves. So we'll abort the I/O request with
|
|
// the error status that we get back from the execption code.
|
|
RC = UDFExceptionHandler( IrpContext, Irp);
|
|
} _SEH2_END;
|
|
|
|
UDFPrint(("UDFPerformVerify: RC = %x\n", RC));
|
|
|
|
return RC;
|
|
|
|
} // end UDFPerformVerify()
|
|
|
|
/*
|
|
|
|
Routine Description:
|
|
|
|
This routine is called to check if a volume is ready for dismount. This
|
|
occurs when only file system references are left on the volume.
|
|
|
|
If the dismount is not currently underway and the user reference count
|
|
has gone to zero then we can begin the dismount.
|
|
|
|
If the dismount is in progress and there are no references left on the
|
|
volume (we check the Vpb for outstanding references as well to catch
|
|
any create calls dispatched to the file system) then we can delete
|
|
the Vcb.
|
|
|
|
Arguments:
|
|
|
|
Vcb - Vcb for the volume to try to dismount.
|
|
|
|
*/
|
|
BOOLEAN
|
|
UDFCheckForDismount(
|
|
IN PtrUDFIrpContext IrpContext,
|
|
IN PVCB Vcb,
|
|
IN BOOLEAN _VcbAcquired
|
|
)
|
|
{
|
|
BOOLEAN VcbPresent = TRUE;
|
|
KIRQL SavedIrql;
|
|
BOOLEAN VcbAcquired;
|
|
ULONG ResidualReferenceCount;
|
|
|
|
UDFPrint(("UDFCheckForDismount:\n"));
|
|
if(!Vcb) return FALSE;
|
|
|
|
// GlobalDataResource is already acquired
|
|
if(!_VcbAcquired) {
|
|
VcbAcquired = UDFAcquireResourceExclusive(&(Vcb->VCBResource), TRUE/*FALSE*/ );
|
|
if(!VcbAcquired)
|
|
return TRUE;
|
|
} else {
|
|
VcbAcquired = TRUE;
|
|
}
|
|
|
|
if ((IrpContext->MajorFunction == IRP_MJ_CREATE) &&
|
|
(IrpContext->TargetDeviceObject == Vcb->TargetDeviceObject)) {
|
|
|
|
ResidualReferenceCount = 2;
|
|
|
|
} else {
|
|
|
|
ResidualReferenceCount = 1;
|
|
}
|
|
|
|
// If the dismount is not already underway then check if the
|
|
// user reference count has gone to zero. If so start the teardown
|
|
// on the Vcb.
|
|
if (!(Vcb->VCBFlags & UDF_VCB_FLAGS_BEING_DISMOUNTED)) {
|
|
if (Vcb->VCBOpenCount <= UDF_RESIDUAL_REFERENCE) {
|
|
VcbPresent = UDFDismountVcb(Vcb, VcbAcquired);
|
|
}
|
|
VcbAcquired = VcbAcquired && VcbPresent;
|
|
|
|
// If the teardown is underway and there are absolutely no references
|
|
// remaining then delete the Vcb. References here include the
|
|
// references in the Vcb and Vpb.
|
|
} else if (!(Vcb->VCBOpenCount)) {
|
|
|
|
IoAcquireVpbSpinLock( &SavedIrql );
|
|
// If there are no file objects and no reference counts in the
|
|
// Vpb we can delete the Vcb. Don't forget that we have the
|
|
// last reference in the Vpb.
|
|
if (Vcb->Vpb->ReferenceCount <= ResidualReferenceCount) {
|
|
|
|
IoReleaseVpbSpinLock( SavedIrql );
|
|
if(VcbAcquired)
|
|
UDFReleaseResource(&(Vcb->VCBResource));
|
|
UDFStopEjectWaiter(Vcb);
|
|
UDFReleaseVCB(Vcb);
|
|
VcbAcquired =
|
|
VcbPresent = FALSE;
|
|
|
|
} else {
|
|
|
|
IoReleaseVpbSpinLock( SavedIrql );
|
|
}
|
|
}
|
|
|
|
// Release any resources still acquired.
|
|
if (!_VcbAcquired && VcbAcquired) {
|
|
UDFReleaseResource(&(Vcb->VCBResource));
|
|
}
|
|
|
|
return VcbPresent;
|
|
} // end UDFCheckForDismount()
|
|
|
|
|
|
/*
|
|
|
|
Routine Description:
|
|
|
|
This routine is called when all of the user references to a volume are
|
|
gone. We will initiate all of the teardown any system resources.
|
|
|
|
If all of the references to this volume are gone at the end of this routine
|
|
then we will complete the teardown of this Vcb and mark the current Vpb
|
|
as not mounted. Otherwise we will allocated a new Vpb for this device
|
|
and keep the current Vpb attached to the Vcb.
|
|
|
|
Arguments:
|
|
|
|
Vcb - Vcb for the volume to dismount.
|
|
|
|
Return Value:
|
|
|
|
BOOLEAN - TRUE if we didn't delete the Vcb, FALSE otherwise.
|
|
|
|
*/
|
|
BOOLEAN
|
|
UDFDismountVcb(
|
|
IN PVCB Vcb,
|
|
IN BOOLEAN VcbAcquired
|
|
)
|
|
{
|
|
|
|
PVPB OldVpb;
|
|
PVPB NewVpb;
|
|
BOOLEAN VcbPresent = TRUE;
|
|
KIRQL SavedIrql;
|
|
|
|
BOOLEAN FinalReference;
|
|
|
|
UDFPrint(("UDFDismountVcb:\n"));
|
|
// We should only take this path once.
|
|
ASSERT( !(Vcb->VCBFlags & UDF_VCB_FLAGS_BEING_DISMOUNTED) );
|
|
|
|
// Mark the Vcb as DismountInProgress.
|
|
Vcb->VCBFlags |= UDF_VCB_FLAGS_BEING_DISMOUNTED;
|
|
|
|
// Allocate a new Vpb in case we will need it.
|
|
NewVpb = (PVPB)DbgAllocatePoolWithTag( NonPagedPool, sizeof( VPB ), 'bpvU' );
|
|
if(!NewVpb) {
|
|
Vcb->VCBFlags &= ~UDF_VCB_FLAGS_BEING_DISMOUNTED;
|
|
return TRUE;
|
|
}
|
|
|
|
RtlZeroMemory( NewVpb, sizeof(VPB) );
|
|
|
|
OldVpb = Vcb->Vpb;
|
|
|
|
// Remove the mount volume reference.
|
|
UDFCloseResidual(Vcb);
|
|
// the only residual reference is cleaned above
|
|
|
|
// Acquire the Vpb spinlock to check for Vpb references.
|
|
IoAcquireVpbSpinLock(&SavedIrql);
|
|
|
|
// Remember if this is the last reference on this Vcb. We incremented
|
|
// the count on the Vpb earlier so we get one last crack it. If our
|
|
// reference has gone to zero but the vpb reference count is greater
|
|
// than zero then the Io system will be responsible for deleting the
|
|
// Vpb.
|
|
FinalReference = (BOOLEAN)(OldVpb->ReferenceCount == 1);
|
|
|
|
// There is a reference count in the Vpb and in the Vcb. We have
|
|
// incremented the reference count in the Vpb to make sure that
|
|
// we have last crack at it. If this is a failed mount then we
|
|
// want to return the Vpb to the IO system to use for the next
|
|
// mount request.
|
|
if (OldVpb->RealDevice->Vpb == OldVpb) {
|
|
|
|
// If not the final reference then swap out the Vpb.
|
|
if (!FinalReference) {
|
|
|
|
NewVpb->Type = IO_TYPE_VPB;
|
|
NewVpb->Size = sizeof( VPB );
|
|
NewVpb->RealDevice = OldVpb->RealDevice;
|
|
|
|
NewVpb->RealDevice->Vpb = NewVpb;
|
|
|
|
NewVpb = NULL;
|
|
IoReleaseVpbSpinLock(SavedIrql);
|
|
// We want to leave the Vpb for the IO system. Mark it
|
|
// as being not mounted. Go ahead and delete the Vcb as
|
|
// well.
|
|
} else {
|
|
|
|
// Make sure to remove the last reference on the Vpb.
|
|
|
|
OldVpb->ReferenceCount--;
|
|
|
|
OldVpb->DeviceObject = NULL;
|
|
Vcb->Vpb->Flags &= ~VPB_MOUNTED;
|
|
|
|
// Clear the Vpb flag so we know not to delete it.
|
|
Vcb->Vpb = NULL;
|
|
|
|
IoReleaseVpbSpinLock(SavedIrql);
|
|
if(VcbAcquired)
|
|
UDFReleaseResource(&(Vcb->VCBResource));
|
|
UDFStopEjectWaiter(Vcb);
|
|
UDFReleaseVCB(Vcb);
|
|
VcbPresent = FALSE;
|
|
}
|
|
|
|
// Someone has already swapped in a new Vpb. If this is the final reference
|
|
// then the file system is responsible for deleting the Vpb.
|
|
} else if (FinalReference) {
|
|
|
|
// Make sure to remove the last reference on the Vpb.
|
|
OldVpb->ReferenceCount--;
|
|
|
|
IoReleaseVpbSpinLock( SavedIrql );
|
|
if(VcbAcquired)
|
|
UDFReleaseResource(&(Vcb->VCBResource));
|
|
UDFStopEjectWaiter(Vcb);
|
|
UDFReleaseVCB(Vcb);
|
|
VcbPresent = FALSE;
|
|
|
|
// The current Vpb is no longer the Vpb for the device (the IO system
|
|
// has already allocated a new one). We leave our reference in the
|
|
// Vpb and will be responsible for deleting it at a later time.
|
|
} else {
|
|
|
|
OldVpb->DeviceObject = NULL;
|
|
Vcb->Vpb->Flags &= ~VPB_MOUNTED;
|
|
|
|
IoReleaseVpbSpinLock( SavedIrql );
|
|
}
|
|
|
|
// Deallocate the new Vpb if we don't need it.
|
|
if (NewVpb != NULL) {
|
|
DbgFreePool( NewVpb );
|
|
}
|
|
|
|
// Let our caller know whether the Vcb is still present.
|
|
return VcbPresent;
|
|
} // end UDFDismountVcb()
|
|
|
|
|
|
NTSTATUS
|
|
UDFCompareVcb(
|
|
IN PVCB OldVcb,
|
|
IN PVCB NewVcb,
|
|
IN BOOLEAN PhysicalOnly
|
|
)
|
|
{
|
|
NTSTATUS RC;
|
|
UDF_FILE_INFO RootFileInfo;
|
|
BOOLEAN SimpleLogicalCheck = FALSE;
|
|
|
|
UDFPrint(("UDFCompareVcb:\n"));
|
|
if(UDFGlobalData.UDFFlags & UDF_DATA_FLAGS_BEING_UNLOADED) {
|
|
UDFPrint((" WRONG_VOLUME\n"));
|
|
return STATUS_WRONG_VOLUME;
|
|
}
|
|
|
|
#define VCB_NE(x) (OldVcb->x != NewVcb->x)
|
|
|
|
// compare physical parameters
|
|
if(PhysicalOnly) {
|
|
UDFPrint((" PhysicalOnly\n"));
|
|
if(VCB_NE(FirstLBA) ||
|
|
VCB_NE(LastLBA) ||
|
|
VCB_NE(FirstTrackNum) ||
|
|
VCB_NE(LastTrackNum) ||
|
|
VCB_NE(NWA) ||
|
|
VCB_NE(LastPossibleLBA) ||
|
|
VCB_NE(PhSerialNumber) ||
|
|
VCB_NE(PhErasable) ||
|
|
VCB_NE(PhDiskType) ||
|
|
VCB_NE(MediaClassEx) ||
|
|
|
|
/* We cannot compare these flags, because NewVcb is in unconditional ReadOnly */
|
|
|
|
/*((OldVcb->VCBFlags & UDF_VCB_FLAGS_VOLUME_READ_ONLY) != (NewVcb->VCBFlags & UDF_VCB_FLAGS_VOLUME_READ_ONLY)) ||
|
|
((OldVcb->VCBFlags & UDF_VCB_FLAGS_MEDIA_READ_ONLY) != (NewVcb->VCBFlags & UDF_VCB_FLAGS_MEDIA_READ_ONLY)) ||*/
|
|
|
|
VCB_NE(TargetDeviceObject) ||
|
|
// VCB_NE(xxx) ||
|
|
// VCB_NE(xxx) ||
|
|
VCB_NE(LastSession) ) {
|
|
|
|
UDFPrint((" WRONG_VOLUME (2)\n"));
|
|
return STATUS_WRONG_VOLUME;
|
|
}
|
|
// Note, MRWStatus can change while media is mounted (stoppped/in-progress/complete)
|
|
// We can compare only (Vcb->MRWStatus == 0) values
|
|
if((OldVcb->MRWStatus == 0) != (NewVcb->MRWStatus == 0)) {
|
|
UDFPrint((" WRONG_VOLUME (4), missmatch MRW status\n"));
|
|
}
|
|
for(uint32 i=OldVcb->FirstTrackNum; i<=OldVcb->LastTrackNum; i++) {
|
|
if(VCB_NE(TrackMap[i].FirstLba) ||
|
|
VCB_NE(TrackMap[i].LastLba) ||
|
|
VCB_NE(TrackMap[i].PacketSize) ||
|
|
VCB_NE(TrackMap[i].TrackParam) ||
|
|
VCB_NE(TrackMap[i].DataParam) ||
|
|
VCB_NE(TrackMap[i].NWA_V) ) {
|
|
UDFPrint((" WRONG_VOLUME (3), missmatch trk %d\n", i));
|
|
return STATUS_WRONG_VOLUME;
|
|
}
|
|
}
|
|
UDFPrint((" Vcb compare Ok\n"));
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
// Something is nasty!!! We perform verify for not flushed volume
|
|
// This should never happen, but some devices/buses and their drivers
|
|
// can lead us to such condition. For example with help of RESET.
|
|
// Now, we hope, that nobody changed media.
|
|
// We shall make simplified logical structure check
|
|
if(OldVcb->Modified) {
|
|
UDFPrint((" Vcb SIMPLE compare on !!!MODIFIED!!! volume\n"));
|
|
ASSERT(FALSE);
|
|
SimpleLogicalCheck = TRUE;
|
|
}
|
|
|
|
// compare logical structure
|
|
if(!SimpleLogicalCheck && (OldVcb->InitVatCount != NewVcb->InitVatCount)) {
|
|
UDFPrint((" InitVatCount %d != %d \n", OldVcb->InitVatCount, NewVcb->InitVatCount));
|
|
return STATUS_WRONG_VOLUME;
|
|
}
|
|
|
|
// Compare volume creation time
|
|
if(OldVcb->VolCreationTime != NewVcb->VolCreationTime) {
|
|
UDFPrint((" VolCreationTime %I64x != %I64x \n", OldVcb->VolCreationTime, NewVcb->VolCreationTime));
|
|
return STATUS_WRONG_VOLUME;
|
|
}
|
|
// Compare serial numbers
|
|
if(OldVcb->SerialNumber != NewVcb->SerialNumber) {
|
|
UDFPrint((" SerialNumber %x != %x \n", OldVcb->SerialNumber, NewVcb->SerialNumber));
|
|
return STATUS_WRONG_VOLUME;
|
|
}
|
|
// Compare volume idents
|
|
if(!SimpleLogicalCheck &&
|
|
RtlCompareUnicodeString(&(OldVcb->VolIdent),&(NewVcb->VolIdent),FALSE)) {
|
|
UDFPrint((" VolIdent missmatch \n"));
|
|
return STATUS_WRONG_VOLUME;
|
|
}
|
|
if(SimpleLogicalCheck) {
|
|
// do not touch RootDir. It can be partially recorded
|
|
UDFPrint((" SimpleLogicalCheck Ok\n"));
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
RC = UDFOpenRootFile__(NewVcb, &(NewVcb->RootLbAddr), &RootFileInfo);
|
|
if(!NT_SUCCESS(RC)) {
|
|
UDFPrint((" Can't open root file, status %x\n", RC));
|
|
UDFCleanUpFile__(NewVcb, &RootFileInfo);
|
|
return STATUS_WRONG_VOLUME;
|
|
}
|
|
// perform exhaustive check
|
|
if(!(OldVcb->RootDirFCB)) {
|
|
UDFPrint((" !(OldVcb->RootDirFCB)\n"));
|
|
wr_vol:
|
|
UDFCloseFile__(NewVcb, &RootFileInfo);
|
|
UDFCleanUpFile__(NewVcb, &RootFileInfo);
|
|
return STATUS_WRONG_VOLUME;
|
|
}
|
|
|
|
if(!UDFCompareFileInfo(&RootFileInfo, OldVcb->RootDirFCB->FileInfo)) {
|
|
UDFPrint((" !UDFCompareFileInfo\n"));
|
|
goto wr_vol;
|
|
}
|
|
UDFCloseFile__(NewVcb, &RootFileInfo);
|
|
UDFCleanUpFile__(NewVcb, &RootFileInfo);
|
|
|
|
UDFPrint(("UDFCompareVcb: Ok\n"));
|
|
return STATUS_SUCCESS;
|
|
|
|
#undef VCB_NE
|
|
|
|
} // end UDFCompareVcb()
|
|
|