176 lines
3.3 KiB
C
176 lines
3.3 KiB
C
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/*++
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Copyright (c) 1993 Microsoft Corporation
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Module Name:
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filobsup.c
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Abstract:
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This module implements the Netware Redirector object support routines.
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Author:
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Manny Weiser (mannyw) 10-Feb-1993
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Revision History:
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--*/
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#include "procs.h"
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//
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// The debug trace level
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//
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#define Dbg (DEBUG_TRACE_FILOBSUP)
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text( PAGE, NwSetFileObject )
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#pragma alloc_text( PAGE, NwDecodeFileObject )
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#endif
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VOID
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NwSetFileObject (
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IN PFILE_OBJECT FileObject OPTIONAL,
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IN PVOID FsContext,
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IN PVOID FsContext2
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)
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/*++
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Routine Description:
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This routine sets the file system pointers within the file object.
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Arguments:
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FileObject - Supplies a pointer to the file object being modified, and
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can optionally be null.
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FsContext - Supplies a pointer to either an icb, fcb, vcb, or dcb
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structure.
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FsContext2 - Supplies a pointer to a icb, or is null.
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Return Value:
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None.
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--*/
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{
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PAGED_CODE();
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DebugTrace(+1, Dbg, "NwSetFileObject, FileObject = %08lx\n", (ULONG_PTR)FileObject );
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//
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// Set the fscontext fields of the file object.
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//
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FileObject->FsContext = FsContext;
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FileObject->FsContext2 = FsContext2;
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DebugTrace(-1, Dbg, "NwSetFileObject -> VOID\n", 0);
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return;
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}
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NODE_TYPE_CODE
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NwDecodeFileObject (
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IN PFILE_OBJECT FileObject,
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OUT PVOID *FsContext,
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OUT PVOID *FsContext2
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)
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/*++
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Routine Description:
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This procedure takes a pointer to a file object, that has already been
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opened by the mailslot file system and figures out what it really
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is opened.
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Arguments:
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FileObject - Supplies the file object pointer being interrogated
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FsContext - Receives a pointer to the FsContext pointer
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FsContext2 - Receives a pointer to the FsContext2 pointer
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Return Value:
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NODE_TYPE_CODE - Returns the node type code for a Rcb, Scb, Dcb, Icb,
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or zero.
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Rcb - indicates that file object opens the netware redirector device.
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Scb - indicates that file object is for a server.
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Dcb - indicates that the file object is for a directory.
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Icb - indicates that the file object is for a file.
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Zero - indicates that the file object was for a netware file
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but has been closed.
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--*/
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{
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NODE_TYPE_CODE NodeTypeCode = NTC_UNDEFINED;
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PAGED_CODE();
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DebugTrace(+1, Dbg, "NwDecodeFileObject, FileObject = %08lx\n", (ULONG_PTR)FileObject);
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//
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// Read the fs FsContext fields of the file object.
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//
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*FsContext = FileObject->FsContext;
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*FsContext2 = FileObject->FsContext2;
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ASSERT ( *FsContext2 != NULL );
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NodeTypeCode = NodeType( *FsContext2 );
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DebugTrace(-1, Dbg, "NwDecodeFileObject -> %08lx\n", NodeTypeCode);
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return NodeTypeCode;
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}
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BOOLEAN
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NwIsIrpTopLevel (
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine detects if an Irp is the Top level requestor, ie. if it is OK
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to do a verify or pop-up now. If TRUE is returned, then no file system
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resources are held above us.
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Arguments:
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Irp - Supplies the Irp being processed
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Status - Supplies the status to complete the Irp with
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Return Value:
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None.
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--*/
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{
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if ( NwGetTopLevelIrp() == NULL ) {
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NwSetTopLevelIrp( Irp );
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return TRUE;
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} else {
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return FALSE;
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}
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}
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