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2b82fe44ea
- Create a branch to drop my ndisuio work svn path=/branches/wlan-bringup/; revision=54809
127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
/*
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* PROJECT: ReactOS FAT file system driver
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* LICENSE: GNU GPLv3 as published by the Free Software Foundation
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* FILE: drivers/filesystems/fastfat/lock.c
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* PURPOSE: Lock support routines
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* PROGRAMMERS: Aleksey Bragin (aleksey@reactos.org)
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*/
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/* INCLUDES *****************************************************************/
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#define NDEBUG
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#include "fastfat.h"
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/* FUNCTIONS ****************************************************************/
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NTSTATUS
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NTAPI
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FatiLockControl(PFAT_IRP_CONTEXT IrpContext, PIRP Irp)
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{
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PIO_STACK_LOCATION IrpSp;
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TYPE_OF_OPEN TypeOfOpen;
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PVCB Vcb;
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PFCB Fcb;
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PCCB Ccb;
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NTSTATUS Status;
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/* Get IRP stack location */
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IrpSp = IoGetCurrentIrpStackLocation(Irp);
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/* Determine type of open */
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TypeOfOpen = FatDecodeFileObject(IrpSp->FileObject, &Vcb, &Fcb, &Ccb);
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/* Only user file open is allowed */
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if (TypeOfOpen != UserFileOpen)
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{
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FatCompleteRequest(IrpContext, Irp, STATUS_INVALID_PARAMETER);
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return STATUS_INVALID_PARAMETER;
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}
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/* Acquire shared FCB lock */
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if (!FatAcquireSharedFcb(IrpContext, Fcb))
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{
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UNIMPLEMENTED;
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//Status = FatFsdPostRequest(IrpContext, Irp);
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Status = STATUS_NOT_IMPLEMENTED;
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return Status;
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}
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/* Check oplock state */
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Status = FsRtlCheckOplock(&Fcb->Fcb.Oplock,
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Irp,
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IrpContext,
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FatOplockComplete,
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NULL);
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if (Status != STATUS_SUCCESS)
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{
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/* Release FCB lock */
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FatReleaseFcb(IrpContext, Fcb);
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return Status;
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}
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/* Process the lock */
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Status = FsRtlProcessFileLock(&Fcb->Fcb.Lock, Irp, NULL);
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/* Update Fast I/O state */
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Fcb->Header.IsFastIoPossible = FatIsFastIoPossible(Fcb);
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/* Complete the request */
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FatCompleteRequest(IrpContext, NULL, 0);
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/* Release FCB lock */
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FatReleaseFcb(IrpContext, Fcb);
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return Status;
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}
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NTSTATUS
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NTAPI
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FatLockControl(PDEVICE_OBJECT DeviceObject, PIRP Irp)
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{
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PFAT_IRP_CONTEXT IrpContext;
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NTSTATUS Status;
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BOOLEAN TopLevel;
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DPRINT1("FatLockControl()\n");
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/* Enter FsRtl critical region */
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FsRtlEnterFileSystem();
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/* Set Top Level IRP if not set */
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TopLevel = FatIsTopLevelIrp(Irp);
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/* Build an irp context */
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IrpContext = FatBuildIrpContext(Irp, IoIsOperationSynchronous(Irp));
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/* Call internal function */
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Status = FatiLockControl(IrpContext, Irp);
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/* Reset Top Level IRP */
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if (TopLevel) IoSetTopLevelIrp(NULL);
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/* Leave FsRtl critical region */
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FsRtlExitFileSystem();
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return Status;
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}
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VOID
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NTAPI
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FatOplockComplete(IN PVOID Context,
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IN PIRP Irp)
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{
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UNIMPLEMENTED;
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}
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VOID
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NTAPI
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FatPrePostIrp(IN PVOID Context,
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IN PIRP Irp)
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{
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UNIMPLEMENTED;
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}
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/* EOF */
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