reactos/drivers/filesystems/cdfs/common.c

243 lines
6.9 KiB
C

/*
* ReactOS kernel
* Copyright (C) 2002, 2003 ReactOS Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: drivers/filesystems/cdfs/common.c
* PURPOSE: CDROM (ISO 9660) filesystem driver
* PROGRAMMER: Art Yerkes
* Eric Kohl
*/
/* INCLUDES *****************************************************************/
#include "cdfs.h"
#define NDEBUG
#include <debug.h>
/* FUNCTIONS ****************************************************************/
NTSTATUS
CdfsReadSectors(IN PDEVICE_OBJECT DeviceObject,
IN ULONG DiskSector,
IN ULONG SectorCount,
IN OUT PUCHAR Buffer,
IN BOOLEAN Override)
{
PIO_STACK_LOCATION Stack;
IO_STATUS_BLOCK IoStatus;
LARGE_INTEGER Offset;
ULONG BlockSize;
KEVENT Event;
PIRP Irp;
NTSTATUS Status;
BOOLEAN LastChance = FALSE;
again:
KeInitializeEvent(&Event,
NotificationEvent,
FALSE);
Offset.u.LowPart = DiskSector << 11;
Offset.u.HighPart = DiskSector >> 21;
BlockSize = BLOCKSIZE * SectorCount;
DPRINT("CdfsReadSectors(DeviceObject %p, DiskSector %u, Buffer %p)\n",
DeviceObject, DiskSector, Buffer);
DPRINT("Offset %I64x BlockSize %u\n",
Offset.QuadPart,
BlockSize);
DPRINT("Building synchronous FSD Request...\n");
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
DeviceObject,
Buffer,
BlockSize,
&Offset,
&Event,
&IoStatus);
if (Irp == NULL)
{
DPRINT("IoBuildSynchronousFsdRequest failed\n");
return(STATUS_INSUFFICIENT_RESOURCES);
}
if (Override)
{
Stack = IoGetNextIrpStackLocation(Irp);
Stack->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
}
DPRINT("Calling IO Driver... with irp %p\n", Irp);
Status = IoCallDriver(DeviceObject, Irp);
DPRINT("Waiting for IO Operation for %p\n", Irp);
if (Status == STATUS_PENDING)
{
DPRINT("Operation pending\n");
KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
DPRINT("Getting IO Status... for %p\n", Irp);
Status = IoStatus.Status;
}
if (!NT_SUCCESS(Status))
{
if (Status == STATUS_VERIFY_REQUIRED)
{
PDEVICE_OBJECT DeviceToVerify;
DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
Status = IoVerifyVolume(DeviceToVerify, FALSE);
if (NT_SUCCESS(Status) && !LastChance)
{
DPRINT("Volume verify succeeded; trying request again\n");
LastChance = TRUE;
goto again;
}
else if (NT_SUCCESS(Status))
{
DPRINT1("Failed to read after successful verify, aborting\n");
Status = STATUS_DEVICE_NOT_READY;
}
else
{
DPRINT1("IoVerifyVolume() failed (Status %lx)\n", Status);
}
}
DPRINT("CdfsReadSectors() failed (Status %x)\n", Status);
DPRINT("(DeviceObject %p, DiskSector %u, Buffer %p, Offset 0x%I64x)\n",
DeviceObject, DiskSector, Buffer,
Offset.QuadPart);
return(Status);
}
DPRINT("Block request succeeded for %p\n", Irp);
return(STATUS_SUCCESS);
}
NTSTATUS
CdfsDeviceIoControl (IN PDEVICE_OBJECT DeviceObject,
IN ULONG CtlCode,
IN PVOID InputBuffer,
IN ULONG InputBufferSize,
IN OUT PVOID OutputBuffer,
IN OUT PULONG OutputBufferSize,
IN BOOLEAN Override)
{
PIO_STACK_LOCATION Stack;
IO_STATUS_BLOCK IoStatus;
KEVENT Event;
PIRP Irp;
NTSTATUS Status;
BOOLEAN LastChance = FALSE;
DPRINT("CdfsDeviceIoControl(DeviceObject %p, CtlCode %u, "
"InputBuffer %p, InputBufferSize %u, OutputBuffer %p, "
"POutputBufferSize %p (%x)\n", DeviceObject, CtlCode,
InputBuffer, InputBufferSize, OutputBuffer, OutputBufferSize,
OutputBufferSize ? *OutputBufferSize : 0);
again:
KeInitializeEvent (&Event, NotificationEvent, FALSE);
DPRINT("Building device I/O control request ...\n");
Irp = IoBuildDeviceIoControlRequest(CtlCode,
DeviceObject,
InputBuffer,
InputBufferSize,
OutputBuffer,
(OutputBufferSize != NULL) ? *OutputBufferSize : 0,
FALSE,
&Event,
&IoStatus);
if (Irp == NULL)
{
DPRINT("IoBuildDeviceIoControlRequest failed\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
if (Override)
{
Stack = IoGetNextIrpStackLocation(Irp);
Stack->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
}
DPRINT ("Calling IO Driver... with irp %p\n", Irp);
Status = IoCallDriver(DeviceObject, Irp);
DPRINT ("Waiting for IO Operation for %p\n", Irp);
if (Status == STATUS_PENDING)
{
DPRINT ("Operation pending\n");
KeWaitForSingleObject (&Event, Suspended, KernelMode, FALSE, NULL);
DPRINT ("Getting IO Status... for %p\n", Irp);
Status = IoStatus.Status;
}
if (OutputBufferSize != NULL)
{
*OutputBufferSize = IoStatus.Information;
}
if (Status == STATUS_VERIFY_REQUIRED)
{
PDEVICE_OBJECT DeviceToVerify;
DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
if (DeviceToVerify)
{
Status = IoVerifyVolume(DeviceToVerify, FALSE);
DPRINT("IoVerifyVolume() returned (Status %lx)\n", Status);
}
if (NT_SUCCESS(Status) && !LastChance)
{
DPRINT1("Volume verify succeeded; trying request again\n");
LastChance = TRUE;
goto again;
}
else if (NT_SUCCESS(Status))
{
DPRINT1("Failed to read after successful verify, aborting\n");
Status = STATUS_DEVICE_NOT_READY;
}
else
{
DPRINT1("IoVerifyVolume() failed (Status %lx)\n", Status);
}
}
DPRINT("Returning Status %x\n", Status);
return Status;
}
/* EOF */