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94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/*
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* PROJECT: ReactOS Named Pipe FileSystem
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: drivers/filesystems/npfs/flushbuf.c
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* PURPOSE: Buffers Flushing Support
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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/* INCLUDES *******************************************************************/
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#include "npfs.h"
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// File ID number for NPFS bugchecking support
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#define NPFS_BUGCHECK_FILE_ID (NPFS_BUGCHECK_FLUSHBUF)
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/* FUNCTIONS ******************************************************************/
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NTSTATUS
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NTAPI
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NpCommonFlushBuffers(IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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NODE_TYPE_CODE NodeTypeCode;
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PNP_CCB Ccb;
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ULONG NamedPipeEnd;
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NTSTATUS Status;
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PNP_DATA_QUEUE FlushQueue;
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PAGED_CODE();
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NodeTypeCode = NpDecodeFileObject(IoGetCurrentIrpStackLocation(Irp)->FileObject,
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NULL,
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&Ccb,
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&NamedPipeEnd);
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if (NodeTypeCode != NPFS_NTC_CCB) return STATUS_PIPE_DISCONNECTED;
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ExAcquireResourceExclusiveLite(&Ccb->NonPagedCcb->Lock, TRUE);
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if (NamedPipeEnd == FILE_PIPE_SERVER_END)
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{
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FlushQueue = &Ccb->DataQueue[FILE_PIPE_OUTBOUND];
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}
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else
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{
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FlushQueue = &Ccb->DataQueue[FILE_PIPE_INBOUND];
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}
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if (FlushQueue->QueueState == WriteEntries)
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{
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Status = NpAddDataQueueEntry(NamedPipeEnd,
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Ccb,
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FlushQueue,
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WriteEntries,
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2,
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0,
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Irp,
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NULL,
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0);
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}
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else
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{
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Status = STATUS_SUCCESS;
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}
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ExReleaseResourceLite(&Ccb->NonPagedCcb->Lock);
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return Status;
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}
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NTSTATUS
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NTAPI
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NpFsdFlushBuffers(IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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NTSTATUS Status;
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PAGED_CODE();
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FsRtlEnterFileSystem();
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NpAcquireSharedVcb();
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Status = NpCommonFlushBuffers(DeviceObject, Irp);
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NpReleaseVcb();
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FsRtlExitFileSystem();
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if (Status != STATUS_PENDING)
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{
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Irp->IoStatus.Status = Status;
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IoCompleteRequest(Irp, IO_NAMED_PIPE_INCREMENT);
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}
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return Status;
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}
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/* EOF */
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