From e611b132f9b8abe35b362e5870b74bce94a1e58e Mon Sep 17 00:00:00 2001
From: Adam <you@example.com>
Date: Sat, 16 May 2020 20:51:50 -0700
Subject: initial commit

---
 private/ntos/npfs/close.c | 236 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 236 insertions(+)
 create mode 100644 private/ntos/npfs/close.c

(limited to 'private/ntos/npfs/close.c')

diff --git a/private/ntos/npfs/close.c b/private/ntos/npfs/close.c
new file mode 100644
index 000000000..8b169d3b5
--- /dev/null
+++ b/private/ntos/npfs/close.c
@@ -0,0 +1,236 @@
+/*++
+
+Copyright (c) 1989  Microsoft Corporation
+
+Module Name:
+
+    Close.c
+
+Abstract:
+
+    This module implements the File Close routine for NPFS called by the
+    dispatch driver.
+
+Author:
+
+    Gary Kimura     [GaryKi]    21-Aug-1990
+
+Revision History:
+
+--*/
+
+#include "NpProcs.h"
+
+//
+//  The debug trace level
+//
+
+#define Dbg                              (DEBUG_TRACE_CLOSE)
+
+//
+//  local procedure prototypes
+//
+
+NTSTATUS
+NpCommonClose (
+    IN PNPFS_DEVICE_OBJECT NpfsDeviceObject,
+    IN PIRP Irp
+    );
+
+#ifdef ALLOC_PRAGMA
+#pragma alloc_text(PAGE, NpCommonClose)
+#pragma alloc_text(PAGE, NpFsdClose)
+#endif
+
+
+NTSTATUS
+NpFsdClose (
+    IN PNPFS_DEVICE_OBJECT NpfsDeviceObject,
+    IN PIRP Irp
+    )
+
+/*++
+
+Routine Description:
+
+    This routine implements the FSD part of the NtCloseFile API calls.
+
+Arguments:
+
+    NpfsDeviceObject - Supplies the device object to use.
+
+    Irp - Supplies the Irp being processed
+
+Return Value:
+
+    NTSTATUS - The Fsd status for the Irp
+
+--*/
+
+{
+    NTSTATUS Status;
+
+    PAGED_CODE();
+
+    DebugTrace(+1, Dbg, "NpFsdClose\n", 0);
+
+    //
+    //  Call the common Close routine.
+    //
+
+    FsRtlEnterFileSystem();
+
+    try {
+
+        Status = NpCommonClose( NpfsDeviceObject, Irp );
+
+    } except(NpExceptionFilter( GetExceptionCode() )) {
+
+        //
+        //  We had some trouble trying to perform the requested
+        //  operation, so we'll abort the I/O request with
+        //  the error status that we get back from the
+        //  execption code
+        //
+
+        Status = NpProcessException( NpfsDeviceObject, Irp, GetExceptionCode() );
+    }
+
+    FsRtlExitFileSystem();
+
+    //
+    //  And return to our caller
+    //
+
+    DebugTrace(-1, Dbg, "NpFsdClose -> %08lx\n", Status );
+
+    return Status;
+}
+
+//
+//  Internal support routine
+//
+
+NTSTATUS
+NpCommonClose (
+    IN PNPFS_DEVICE_OBJECT NpfsDeviceObject,
+    IN PIRP Irp
+    )
+
+/*++
+
+Routine Description:
+
+    This is the common routine for creating/opening a file.
+
+Arguments:
+
+    Irp - Supplies the Irp to process
+
+Return Value:
+
+    NTSTATUS - the return status for the operation
+
+--*/
+
+{
+    NTSTATUS Status;
+
+    PIO_STACK_LOCATION IrpSp;
+
+    NODE_TYPE_CODE NodeTypeCode;
+    PFCB Fcb;
+    PCCB Ccb;
+
+    PAGED_CODE();
+
+    //
+    //  Get the current stack location
+    //
+
+    IrpSp = IoGetCurrentIrpStackLocation( Irp );
+
+    DebugTrace(+1, Dbg, "NpCommonClose...\n", 0);
+    DebugTrace( 0, Dbg, " Irp                    = %08lx\n", Irp);
+
+    //
+    //  Now acquire exclusive access to the vcb
+    //
+
+    NpAcquireExclusiveVcb();
+
+    try {
+
+        //
+        //  Decode the file object to figure out who we are.  If the result
+        //  is null then the pipe has been disconnected.
+        //
+
+        if ((NodeTypeCode = NpDecodeFileObject( IrpSp->FileObject,
+                                                &Fcb,
+                                                &Ccb,
+                                                NULL )) == NTC_UNDEFINED) {
+
+            DebugTrace(0, Dbg, "Pipe is disconnected from us\n", 0);
+
+            NpCompleteRequest( Irp, STATUS_PIPE_DISCONNECTED );
+            try_return( Status = STATUS_PIPE_DISCONNECTED );
+        }
+
+        //
+        //  Now case on the type of file object we're closing
+        //
+
+        switch (NodeTypeCode) {
+
+        case NPFS_NTC_VCB:
+
+            //
+            //  Decrement the Open count and clear our fields in the file object
+            //
+
+            NpVcb->OpenCount -= 1;
+            NpSetFileObject( IrpSp->FileObject, NULL, NULL, FILE_PIPE_SERVER_END );
+
+            break;
+
+        case NPFS_NTC_ROOT_DCB:
+
+            //
+            //  Decrement the Open count and clear our fields in the file object
+            //
+
+            Fcb->OpenCount -= 1;
+            NpSetFileObject( IrpSp->FileObject, NULL, NULL, FILE_PIPE_SERVER_END );
+
+            //
+            //  Remove the root dcb ccb.
+            //
+
+            NpDeleteCcb( Ccb );
+
+            break;
+
+        case NPFS_NTC_CCB:
+
+            break;
+        }
+
+        //
+        //  Complete the close irp
+        //
+
+        NpCompleteRequest( Irp, STATUS_SUCCESS );
+
+        Status = STATUS_SUCCESS;
+
+    try_exit: NOTHING;
+    } finally {
+
+        NpReleaseVcb( );
+    }
+
+    DebugTrace(-1, Dbg, "NpCommonClose -> %08lx\n", Status);
+    return Status;
+}
+
-- 
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