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https://github.com/reactos/reactos.git
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92 lines
2.3 KiB
C
92 lines
2.3 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/fileobsup.c
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* PURPOSE: Pipes File Object 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_FILEOBSUP)
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/* FUNCTIONS ******************************************************************/
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NODE_TYPE_CODE
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NTAPI
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NpDecodeFileObject(IN PFILE_OBJECT FileObject,
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OUT PVOID* PrimaryContext OPTIONAL,
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OUT PNP_CCB* Ccb,
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OUT PULONG NamedPipeEnd OPTIONAL)
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{
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ULONG_PTR Context;
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PNP_CCB Node;
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PAGED_CODE();
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Context = (ULONG_PTR)FileObject->FsContext;
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if ((Context) && (Context != 1))
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{
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if (NamedPipeEnd) *NamedPipeEnd = Context & 1;
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Node = (PVOID)(Context & ~1);
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switch (Node->NodeType)
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{
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case NPFS_NTC_VCB:
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return NPFS_NTC_VCB;
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case NPFS_NTC_ROOT_DCB:
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*Ccb = FileObject->FsContext2;
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if (PrimaryContext) *PrimaryContext = Node;
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return NPFS_NTC_ROOT_DCB;
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case NPFS_NTC_CCB:
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*Ccb = Node;
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if (PrimaryContext) *PrimaryContext = Node->Fcb;
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return NPFS_NTC_CCB;
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default:
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NpBugCheck(Node->NodeType, 0, 0);
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break;
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}
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}
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return 0;
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}
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VOID
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NTAPI
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NpSetFileObject(IN PFILE_OBJECT FileObject,
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IN PVOID PrimaryContext,
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IN PVOID Ccb,
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IN ULONG NamedPipeEnd)
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{
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BOOLEAN FileIsPipe;
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PAGED_CODE();
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if (!FileObject) return;
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if ((PrimaryContext) && (((PNP_CCB)PrimaryContext)->NodeType == NPFS_NTC_CCB))
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{
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FileIsPipe = TRUE;
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if (NamedPipeEnd == FILE_PIPE_SERVER_END)
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{
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PrimaryContext = (PVOID) ((ULONG_PTR) PrimaryContext | 1);
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}
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}
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else
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{
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FileIsPipe = FALSE;
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}
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FileObject->FsContext = PrimaryContext;
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FileObject->FsContext2 = Ccb;
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FileObject->PrivateCacheMap = (PVOID)1;
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if (FileIsPipe) FileObject->Flags |= FO_NAMED_PIPE;
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}
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/* EOF */
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