mirror of
https://github.com/reactos/reactos.git
synced 2024-12-28 18:15:11 +00:00
516 lines
15 KiB
C
516 lines
15 KiB
C
/*
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* PROJECT: VFAT Filesystem
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: Temporary sector reading support
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* COPYRIGHT: Copyright 1999-2001 David Welch <welch@cwcom.net>
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*/
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/* INCLUDES *****************************************************************/
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#include "vfat.h"
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ***************************************************************/
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static IO_COMPLETION_ROUTINE VfatReadWritePartialCompletion;
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static
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NTSTATUS
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NTAPI
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VfatReadWritePartialCompletion(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN PVOID Context)
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{
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PVFAT_IRP_CONTEXT IrpContext;
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PMDL Mdl;
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UNREFERENCED_PARAMETER(DeviceObject);
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DPRINT("VfatReadWritePartialCompletion() called\n");
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IrpContext = (PVFAT_IRP_CONTEXT)Context;
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while ((Mdl = Irp->MdlAddress))
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{
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Irp->MdlAddress = Mdl->Next;
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IoFreeMdl(Mdl);
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}
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if (Irp->PendingReturned)
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{
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IrpContext->Flags |= IRPCONTEXT_PENDINGRETURNED;
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}
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else
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{
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IrpContext->Flags &= ~IRPCONTEXT_PENDINGRETURNED;
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}
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if (!NT_SUCCESS(Irp->IoStatus.Status))
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{
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IrpContext->Irp->IoStatus.Status = Irp->IoStatus.Status;
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}
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if (0 == InterlockedDecrement((PLONG)&IrpContext->RefCount) &&
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BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_PENDINGRETURNED))
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{
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KeSetEvent(&IrpContext->Event, IO_NO_INCREMENT, FALSE);
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}
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IoFreeIrp(Irp);
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DPRINT("VfatReadWritePartialCompletion() done\n");
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return STATUS_MORE_PROCESSING_REQUIRED;
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}
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NTSTATUS
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VfatReadDisk(
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IN PDEVICE_OBJECT pDeviceObject,
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IN PLARGE_INTEGER ReadOffset,
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IN ULONG ReadLength,
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IN OUT PUCHAR Buffer,
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IN BOOLEAN Override)
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{
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PIO_STACK_LOCATION Stack;
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PIRP Irp;
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IO_STATUS_BLOCK IoStatus;
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KEVENT Event;
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NTSTATUS Status;
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again:
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KeInitializeEvent(&Event, NotificationEvent, FALSE);
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DPRINT("VfatReadDisk(pDeviceObject %p, Offset %I64x, Length %u, Buffer %p)\n",
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pDeviceObject, ReadOffset->QuadPart, ReadLength, Buffer);
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DPRINT ("Building synchronous FSD Request...\n");
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Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
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pDeviceObject,
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Buffer,
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ReadLength,
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ReadOffset,
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&Event,
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&IoStatus);
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if (Irp == NULL)
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{
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DPRINT("IoBuildSynchronousFsdRequest failed\n");
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return STATUS_UNSUCCESSFUL;
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}
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if (Override)
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{
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Stack = IoGetNextIrpStackLocation(Irp);
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Stack->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
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}
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DPRINT("Calling IO Driver... with irp %p\n", Irp);
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Status = IoCallDriver (pDeviceObject, Irp);
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DPRINT("Waiting for IO Operation for %p\n", Irp);
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if (Status == STATUS_PENDING)
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{
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DPRINT("Operation pending\n");
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KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
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DPRINT("Getting IO Status... for %p\n", Irp);
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Status = IoStatus.Status;
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}
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if (Status == STATUS_VERIFY_REQUIRED)
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{
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PDEVICE_OBJECT DeviceToVerify;
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DPRINT1 ("Media change detected!\n");
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/* Find the device to verify and reset the thread field to empty value again. */
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DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
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IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
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Status = IoVerifyVolume(DeviceToVerify,
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FALSE);
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if (NT_SUCCESS(Status))
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{
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DPRINT1("Volume verification successful; Reissuing read request\n");
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goto again;
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}
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}
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if (!NT_SUCCESS(Status))
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{
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DPRINT("IO failed!!! VfatReadDisk : Error code: %x\n", Status);
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DPRINT("(pDeviceObject %p, Offset %I64x, Size %u, Buffer %p\n",
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pDeviceObject, ReadOffset->QuadPart, ReadLength, Buffer);
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return Status;
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}
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DPRINT("Block request succeeded for %p\n", Irp);
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return STATUS_SUCCESS;
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}
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NTSTATUS
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VfatReadDiskPartial(
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IN PVFAT_IRP_CONTEXT IrpContext,
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IN PLARGE_INTEGER ReadOffset,
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IN ULONG ReadLength,
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ULONG BufferOffset,
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IN BOOLEAN Wait)
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{
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PIRP Irp;
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PIO_STACK_LOCATION StackPtr;
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NTSTATUS Status;
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PVOID Buffer;
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DPRINT("VfatReadDiskPartial(IrpContext %p, ReadOffset %I64x, ReadLength %u, BufferOffset %u, Wait %u)\n",
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IrpContext, ReadOffset->QuadPart, ReadLength, BufferOffset, Wait);
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DPRINT("Building asynchronous FSD Request...\n");
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Buffer = (PCHAR)MmGetMdlVirtualAddress(IrpContext->Irp->MdlAddress) + BufferOffset;
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again:
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Irp = IoAllocateIrp(IrpContext->DeviceExt->StorageDevice->StackSize, TRUE);
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if (Irp == NULL)
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{
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DPRINT("IoAllocateIrp failed\n");
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return STATUS_UNSUCCESSFUL;
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}
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Irp->UserIosb = NULL;
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Irp->Tail.Overlay.Thread = PsGetCurrentThread();
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StackPtr = IoGetNextIrpStackLocation(Irp);
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StackPtr->MajorFunction = IRP_MJ_READ;
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StackPtr->MinorFunction = 0;
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StackPtr->Flags = 0;
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StackPtr->Control = 0;
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StackPtr->DeviceObject = IrpContext->DeviceExt->StorageDevice;
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StackPtr->FileObject = NULL;
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StackPtr->CompletionRoutine = NULL;
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StackPtr->Parameters.Read.Length = ReadLength;
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StackPtr->Parameters.Read.ByteOffset = *ReadOffset;
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if (!IoAllocateMdl(Buffer, ReadLength, FALSE, FALSE, Irp))
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{
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DPRINT("IoAllocateMdl failed\n");
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IoFreeIrp(Irp);
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return STATUS_UNSUCCESSFUL;
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}
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IoBuildPartialMdl(IrpContext->Irp->MdlAddress, Irp->MdlAddress, Buffer, ReadLength);
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IoSetCompletionRoutine(Irp,
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VfatReadWritePartialCompletion,
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IrpContext,
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TRUE,
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TRUE,
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TRUE);
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if (Wait)
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{
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KeInitializeEvent(&IrpContext->Event, NotificationEvent, FALSE);
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IrpContext->RefCount = 1;
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}
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else
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{
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InterlockedIncrement((PLONG)&IrpContext->RefCount);
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}
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DPRINT("Calling IO Driver... with irp %p\n", Irp);
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Status = IoCallDriver(IrpContext->DeviceExt->StorageDevice, Irp);
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if (Wait && Status == STATUS_PENDING)
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{
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KeWaitForSingleObject(&IrpContext->Event, Executive, KernelMode, FALSE, NULL);
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Status = IrpContext->Irp->IoStatus.Status;
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}
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if (Status == STATUS_VERIFY_REQUIRED)
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{
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PDEVICE_OBJECT DeviceToVerify;
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DPRINT1("Media change detected!\n");
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/* Find the device to verify and reset the thread field to empty value again. */
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DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
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IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
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Status = IoVerifyVolume(DeviceToVerify,
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FALSE);
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if (NT_SUCCESS(Status))
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{
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DPRINT1("Volume verification successful; Reissuing read request\n");
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goto again;
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}
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}
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DPRINT("%x\n", Status);
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return Status;
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}
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/* Used by dirty bit code, likely to be killed the day it's properly handle
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* This is just a copy paste from VfatReadDisk()
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*/
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NTSTATUS
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VfatWriteDisk(
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IN PDEVICE_OBJECT pDeviceObject,
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IN PLARGE_INTEGER WriteOffset,
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IN ULONG WriteLength,
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IN OUT PUCHAR Buffer,
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IN BOOLEAN Override)
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{
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PIO_STACK_LOCATION Stack;
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PIRP Irp;
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IO_STATUS_BLOCK IoStatus;
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KEVENT Event;
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NTSTATUS Status;
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again:
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KeInitializeEvent(&Event, NotificationEvent, FALSE);
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DPRINT("VfatWriteDisk(pDeviceObject %p, Offset %I64x, Length %u, Buffer %p)\n",
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pDeviceObject, WriteOffset->QuadPart, WriteLength, Buffer);
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DPRINT ("Building synchronous FSD Request...\n");
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Irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
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pDeviceObject,
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Buffer,
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WriteLength,
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WriteOffset,
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&Event,
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&IoStatus);
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if (Irp == NULL)
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{
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DPRINT("IoBuildSynchronousFsdRequest failed\n");
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return STATUS_UNSUCCESSFUL;
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}
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if (Override)
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{
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Stack = IoGetNextIrpStackLocation(Irp);
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Stack->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
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}
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DPRINT("Calling IO Driver... with irp %p\n", Irp);
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Status = IoCallDriver (pDeviceObject, Irp);
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DPRINT("Waiting for IO Operation for %p\n", Irp);
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if (Status == STATUS_PENDING)
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{
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DPRINT("Operation pending\n");
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KeWaitForSingleObject(&Event, Suspended, KernelMode, FALSE, NULL);
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DPRINT("Getting IO Status... for %p\n", Irp);
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Status = IoStatus.Status;
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}
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if (Status == STATUS_VERIFY_REQUIRED)
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{
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PDEVICE_OBJECT DeviceToVerify;
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DPRINT1 ("Media change detected!\n");
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/* Find the device to verify and reset the thread field to empty value again. */
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DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
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IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
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Status = IoVerifyVolume(DeviceToVerify,
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FALSE);
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if (NT_SUCCESS(Status))
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{
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DPRINT1("Volume verification successful; Reissuing write request\n");
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goto again;
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}
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}
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if (!NT_SUCCESS(Status))
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{
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DPRINT("IO failed!!! VfatWriteDisk : Error code: %x\n", Status);
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DPRINT("(pDeviceObject %p, Offset %I64x, Size %u, Buffer %p\n",
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pDeviceObject, WriteOffset->QuadPart, WriteLength, Buffer);
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return Status;
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}
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DPRINT("Block request succeeded for %p\n", Irp);
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return STATUS_SUCCESS;
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}
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NTSTATUS
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VfatWriteDiskPartial(
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IN PVFAT_IRP_CONTEXT IrpContext,
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IN PLARGE_INTEGER WriteOffset,
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IN ULONG WriteLength,
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IN ULONG BufferOffset,
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IN BOOLEAN Wait)
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{
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PIRP Irp;
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PIO_STACK_LOCATION StackPtr;
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NTSTATUS Status;
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PVOID Buffer;
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DPRINT("VfatWriteDiskPartial(IrpContext %p, WriteOffset %I64x, WriteLength %u, BufferOffset %x, Wait %u)\n",
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IrpContext, WriteOffset->QuadPart, WriteLength, BufferOffset, Wait);
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Buffer = (PCHAR)MmGetMdlVirtualAddress(IrpContext->Irp->MdlAddress) + BufferOffset;
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again:
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DPRINT("Building asynchronous FSD Request...\n");
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Irp = IoAllocateIrp(IrpContext->DeviceExt->StorageDevice->StackSize, TRUE);
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if (Irp == NULL)
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{
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DPRINT("IoAllocateIrp failed\n");
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return STATUS_UNSUCCESSFUL;
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}
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Irp->UserIosb = NULL;
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Irp->Tail.Overlay.Thread = PsGetCurrentThread();
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StackPtr = IoGetNextIrpStackLocation(Irp);
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StackPtr->MajorFunction = IRP_MJ_WRITE;
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StackPtr->MinorFunction = 0;
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StackPtr->Flags = 0;
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StackPtr->Control = 0;
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StackPtr->DeviceObject = IrpContext->DeviceExt->StorageDevice;
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StackPtr->FileObject = NULL;
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StackPtr->CompletionRoutine = NULL;
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StackPtr->Parameters.Read.Length = WriteLength;
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StackPtr->Parameters.Read.ByteOffset = *WriteOffset;
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if (!IoAllocateMdl(Buffer, WriteLength, FALSE, FALSE, Irp))
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{
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DPRINT("IoAllocateMdl failed\n");
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IoFreeIrp(Irp);
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return STATUS_UNSUCCESSFUL;
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}
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IoBuildPartialMdl(IrpContext->Irp->MdlAddress, Irp->MdlAddress, Buffer, WriteLength);
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IoSetCompletionRoutine(Irp,
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VfatReadWritePartialCompletion,
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IrpContext,
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TRUE,
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TRUE,
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TRUE);
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if (Wait)
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{
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KeInitializeEvent(&IrpContext->Event, NotificationEvent, FALSE);
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IrpContext->RefCount = 1;
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}
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else
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{
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InterlockedIncrement((PLONG)&IrpContext->RefCount);
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}
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DPRINT("Calling IO Driver...\n");
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Status = IoCallDriver(IrpContext->DeviceExt->StorageDevice, Irp);
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if (Wait && Status == STATUS_PENDING)
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{
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KeWaitForSingleObject(&IrpContext->Event, Executive, KernelMode, FALSE, NULL);
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Status = IrpContext->Irp->IoStatus.Status;
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}
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if (Status == STATUS_VERIFY_REQUIRED)
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{
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PDEVICE_OBJECT DeviceToVerify;
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DPRINT1("Media change detected!\n");
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/* Find the device to verify and reset the thread field to empty value again. */
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DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
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IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
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Status = IoVerifyVolume(DeviceToVerify,
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FALSE);
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if (NT_SUCCESS(Status))
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{
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DPRINT1("Volume verification successful; Reissuing write request\n");
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goto again;
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}
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}
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return Status;
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}
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NTSTATUS
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VfatBlockDeviceIoControl(
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IN PDEVICE_OBJECT DeviceObject,
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IN ULONG CtlCode,
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IN PVOID InputBuffer OPTIONAL,
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IN ULONG InputBufferSize,
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IN OUT PVOID OutputBuffer OPTIONAL,
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IN OUT PULONG OutputBufferSize,
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IN BOOLEAN Override)
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{
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PIO_STACK_LOCATION Stack;
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KEVENT Event;
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PIRP Irp;
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IO_STATUS_BLOCK IoStatus;
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NTSTATUS Status;
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DPRINT("VfatBlockDeviceIoControl(DeviceObject %p, CtlCode %x, "
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"InputBuffer %p, InputBufferSize %x, OutputBuffer %p, "
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"OutputBufferSize %p (%x)\n", DeviceObject, CtlCode,
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InputBuffer, InputBufferSize, OutputBuffer, OutputBufferSize,
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OutputBufferSize ? *OutputBufferSize : 0);
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again:
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KeInitializeEvent(&Event, NotificationEvent, FALSE);
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DPRINT("Building device I/O control request ...\n");
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Irp = IoBuildDeviceIoControlRequest(CtlCode,
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DeviceObject,
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InputBuffer,
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InputBufferSize,
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OutputBuffer,
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(OutputBufferSize) ? *OutputBufferSize : 0,
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FALSE,
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&Event,
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&IoStatus);
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if (Irp == NULL)
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{
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DPRINT("IoBuildDeviceIoControlRequest failed\n");
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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if (Override)
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{
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Stack = IoGetNextIrpStackLocation(Irp);
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Stack->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
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}
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DPRINT("Calling IO Driver... with irp %p\n", Irp);
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Status = IoCallDriver(DeviceObject, Irp);
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DPRINT("Waiting for IO Operation for %p\n", Irp);
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if (Status == STATUS_PENDING)
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{
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DPRINT("Operation pending\n");
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KeWaitForSingleObject (&Event, Suspended, KernelMode, FALSE, NULL);
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DPRINT("Getting IO Status... for %p\n", Irp);
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Status = IoStatus.Status;
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}
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if (Status == STATUS_VERIFY_REQUIRED)
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{
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PDEVICE_OBJECT DeviceToVerify;
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DPRINT1("Media change detected!\n");
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/* Find the device to verify and reset the thread field to empty value again. */
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DeviceToVerify = IoGetDeviceToVerify(PsGetCurrentThread());
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IoSetDeviceToVerify(PsGetCurrentThread(), NULL);
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Status = IoVerifyVolume(DeviceToVerify,
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FALSE);
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if (NT_SUCCESS(Status))
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{
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DPRINT1("Volume verification successful; Reissuing IOCTL request\n");
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goto again;
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}
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}
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if (OutputBufferSize)
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{
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*OutputBufferSize = IoStatus.Information;
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}
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DPRINT("Returning Status %x\n", Status);
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return Status;
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}
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