308 lines
6.7 KiB
C
308 lines
6.7 KiB
C
/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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smbnotfy.c
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Abstract:
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This module contains routine for processing the following SMBs:
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NT Notify Change.
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Author:
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Manny Weiser (mannyw) 29-Oct-1991
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Revision History:
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--*/
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#include "precomp.h"
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#include "smbnotfy.tmh"
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#pragma hdrstop
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//
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// Forward declarations
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//
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VOID SRVFASTCALL
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RestartNtNotifyChange (
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PWORK_CONTEXT WorkContext
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text( PAGE, SrvSmbNtNotifyChange )
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#pragma alloc_text( PAGE, RestartNtNotifyChange )
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#pragma alloc_text( PAGE, SrvSmbFindNotify )
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#pragma alloc_text( PAGE, SrvSmbFindNotifyClose )
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#endif
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SMB_TRANS_STATUS
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SrvSmbNtNotifyChange (
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IN OUT PWORK_CONTEXT WorkContext
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)
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/*++
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Routine Description:
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Processes an NT notify change SMB. This request arrives in an
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NT Transaction SMB.
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Arguments:
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WorkContext - Supplies the address of a Work Context Block
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describing the current request. See smbtypes.h for a more
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complete description of the valid fields.
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Return Value:
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BOOLEAN - Indicates whether an error occurred. See smbtypes.h for a
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more complete description.
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--*/
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{
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PREQ_NOTIFY_CHANGE request;
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NTSTATUS status;
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PTRANSACTION transaction;
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PRFCB rfcb;
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USHORT fid;
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PAGED_CODE( );
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transaction = WorkContext->Parameters.Transaction;
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request = (PREQ_NOTIFY_CHANGE)transaction->InSetup;
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if( transaction->SetupCount * sizeof( USHORT ) < sizeof( REQ_NOTIFY_CHANGE ) ) {
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SrvSetSmbError( WorkContext, STATUS_INVALID_PARAMETER );
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return SmbTransStatusErrorWithoutData;
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}
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fid = SmbGetUshort( &request->Fid );
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//
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// Verify the FID. If verified, the RFCB block is referenced
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// and its addresses is stored in the WorkContext block, and the
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// RFCB address is returned.
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//
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rfcb = SrvVerifyFid(
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WorkContext,
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fid,
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TRUE,
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NULL, // don't serialize with raw write
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&status
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);
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if ( rfcb == SRV_INVALID_RFCB_POINTER ) {
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//
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// Invalid file ID or write behind error. Reject the request.
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//
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IF_DEBUG(ERRORS) {
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KdPrint((
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"SrvSmbNtIoctl: Status %X on FID: 0x%lx\n",
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status,
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fid
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));
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}
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SrvSetSmbError( WorkContext, status );
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return SmbTransStatusErrorWithoutData;
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}
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CHECK_FUNCTION_ACCESS(
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rfcb->GrantedAccess,
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IRP_MJ_DIRECTORY_CONTROL,
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IRP_MN_NOTIFY_CHANGE_DIRECTORY,
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0,
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&status
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);
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if ( !NT_SUCCESS( status ) ) {
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SrvStatistics.GrantedAccessErrors++;
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SrvSetSmbError( WorkContext, status );
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return SmbTransStatusErrorWithoutData;
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}
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//
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// Set the Restart Routine addresses in the work context block.
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//
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WorkContext->FsdRestartRoutine = SrvQueueWorkToFspAtDpcLevel;
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WorkContext->FspRestartRoutine = RestartNtNotifyChange;
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//
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// Build the IRP to start a the I/O control.
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// Pass this request to the filesystem.
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//
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SrvBuildNotifyChangeRequest(
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WorkContext->Irp,
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rfcb->Lfcb->FileObject,
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WorkContext,
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SmbGetUlong( &request->CompletionFilter ),
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transaction->OutParameters,
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transaction->MaxParameterCount,
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request->WatchTree
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);
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#if DBG_STUCK
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//
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// Since change notify can take an arbitrary amount of time, do
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// not include it in the "stuck detection & printout" code in the
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// scavenger
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//
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WorkContext->IsNotStuck = TRUE;
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#endif
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(VOID)IoCallDriver(
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IoGetRelatedDeviceObject( rfcb->Lfcb->FileObject ),
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WorkContext->Irp
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);
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//
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// The call was successfully started, return InProgress to the caller
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//
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return SmbTransStatusInProgress;
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}
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VOID SRVFASTCALL
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RestartNtNotifyChange (
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PWORK_CONTEXT WorkContext
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)
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/*++
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Routine Description:
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Completes processing of an NT Notify Change SMB.
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Arguments:
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WorkContext - Work context block for the operation.
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Return Value:
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None.
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--*/
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{
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NTSTATUS status;
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PTRANSACTION transaction;
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PIRP irp;
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ULONG length;
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PAGED_CODE( );
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//
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// If we built an MDL for this IRP, free it now.
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//
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irp = WorkContext->Irp;
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if ( irp->MdlAddress != NULL ) {
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MmUnlockPages( irp->MdlAddress );
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IoFreeMdl( irp->MdlAddress );
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irp->MdlAddress = NULL;
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}
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status = irp->IoStatus.Status;
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if ( !NT_SUCCESS( status ) ) {
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SrvSetSmbError( WorkContext, status );
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SrvCompleteExecuteTransaction(
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WorkContext,
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SmbTransStatusErrorWithoutData
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);
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return;
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}
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//
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// The Notify change request has completed successfully. Send the
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// response.
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//
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length = (ULONG)irp->IoStatus.Information;
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transaction = WorkContext->Parameters.Transaction;
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ASSERT( length <= transaction->MaxParameterCount );
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if ( irp->UserBuffer != NULL ) {
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//
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// The file system wanted "neither" I/O for this request. This
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// means that the file system will have allocated a system
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// buffer for the returned data. Normally this would be copied
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// back to our user buffer during I/O completion, but we
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// short-circuit I/O completion before the copy happens. So we
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// have to copy the data ourselves.
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//
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if ( irp->AssociatedIrp.SystemBuffer != NULL ) {
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ASSERT( irp->UserBuffer == transaction->OutParameters );
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RtlCopyMemory( irp->UserBuffer, irp->AssociatedIrp.SystemBuffer, length );
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}
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}
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transaction->SetupCount = 0;
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transaction->ParameterCount = length;
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transaction->DataCount = 0;
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//
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// !!! Mask a base notify bug, remove when the bug is fixed.
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//
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if ( status == STATUS_NOTIFY_CLEANUP ) {
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transaction->ParameterCount = 0;
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}
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SrvCompleteExecuteTransaction( WorkContext, SmbTransStatusSuccess );
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return;
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} // RestartNtNotifyChange
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//
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// Since OS/2 chose not to expose the DosFindNotifyFirst/Next/Close APIs,
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// OS/2 LAN Man does not officially support these SMBs. This is true,
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// even though the Find Notify SMB is documented as a LAN Man 2.0 SMB
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// there is code in both the LM2.0 server and redir to support it.
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//
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// Therefore the NT server will also not support these SMBs.
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//
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SMB_TRANS_STATUS
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SrvSmbFindNotify (
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IN OUT PWORK_CONTEXT WorkContext
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)
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{
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PAGED_CODE( );
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return SrvTransactionNotImplemented( WorkContext );
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}
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SMB_PROCESSOR_RETURN_TYPE
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SrvSmbFindNotifyClose (
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SMB_PROCESSOR_PARAMETERS
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)
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{
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PAGED_CODE( );
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return SrvSmbNotImplemented( SMB_PROCESSOR_ARGUMENTS );
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}
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