windows-xp/Source/XPSP1/NT/base/fs/rdr2/rdbss/smb.mrx/rename.c

/*++

Copyright (c) 1989  Microsoft Corporation

Module Name:

    rename.c

Abstract:

    This module implements rename in the smb minirdr.

Author:

    Balan Sethu Raman      [SethuR]      7-March-1995

Revision History:

--*/

#include "precomp.h"
#pragma hdrstop

#ifdef  ALLOC_PRAGMA
#pragma alloc_text(PAGE, MRxSmbRename)
#pragma alloc_text(PAGE, MRxSmbBuildRename)
#pragma alloc_text(PAGE, MRxSmbBuildDeleteForRename)
#pragma alloc_text(PAGE, SmbPseExchangeStart_Rename)
#pragma alloc_text(PAGE, MRxSmbFinishRename)
#pragma alloc_text(PAGE, MRxSmbBuildCheckEmptyDirectory)
#pragma alloc_text(PAGE, SmbPseExchangeStart_SetDeleteDisposition)
#pragma alloc_text(PAGE, MRxSmbSetDeleteDisposition)
#endif

//
//  The debug trace level
//

#define Dbg                              (DEBUG_TRACE_FILEINFO)

NTSTATUS
SmbPseExchangeStart_Rename(
    SMBPSE_ORDINARY_EXCHANGE_ARGUMENT_SIGNATURE
    );
NTSTATUS
SmbPseExchangeStart_SetDeleteDisposition(
    SMBPSE_ORDINARY_EXCHANGE_ARGUMENT_SIGNATURE
    );



MRxSmbRename(
      IN PRX_CONTEXT            RxContext
      )
/*++

Routine Description:

   This routine does a rename by
     1) purge and remove buffering rights....setup the FCB so that no more stuff can get thru.
     2) closing its fid along with any deferred fids.
     3) if replace...do a delete
     4) do a downlevel smb_com_rename.

   there are many provisos but i think that this is the best balance. it is a real shame that the
   NT-->NT path was never implemented in nt4.0 or before.

Arguments:

    RxContext - the RDBSS context

Return Value:

    RXSTATUS - The return status for the operation

--*/
{
    NTSTATUS Status = RX_MAP_STATUS(SUCCESS);
    RxCaptureFcb; RxCaptureFobx;

    PSMB_PSE_ORDINARY_EXCHANGE OrdinaryExchange;

    PAGED_CODE();

RETRY:
    RxDbgTrace(0, Dbg, ("MRxSmbRename\n", 0 ));

    ASSERT( NodeType(capFobx->pSrvOpen) == RDBSS_NTC_SRVOPEN );
    //ASSERT( RxContext->Info.FileInformationClass == FileRenameInformation); //later we'll do downlevel delete here as well

    Status = SmbPseCreateOrdinaryExchange(RxContext,
                                          capFobx->pSrvOpen->pVNetRoot,
                                          SMBPSE_OE_FROM_RENAME,
                                          SmbPseExchangeStart_Rename,
                                          &OrdinaryExchange);

    if (Status != STATUS_SUCCESS) {
        RxDbgTrace(0, Dbg, ("Couldn't get the smb buf!\n"));
        return(Status);
    }

    Status = SmbPseInitiateOrdinaryExchange(OrdinaryExchange);

    ASSERT (Status != RX_MAP_STATUS(PENDING));

    SmbPseFinalizeOrdinaryExchange(OrdinaryExchange);

    if (Status == STATUS_RETRY) {
        goto RETRY;
    }

    if (Status == STATUS_SUCCESS) {
        // create the name based file not found cache
        MRxSmbCacheFileNotFound(RxContext);
        // invalide the file not found cache for the new name if exists
        MRxSmbInvalidateFileNotFoundCacheForRename(RxContext);
    }

    // invalidate the name based file info cache
    MRxSmbInvalidateFileInfoCache(RxContext);
    MRxSmbInvalidateInternalFileInfoCache(RxContext);

    RxDbgTrace(0, Dbg, ("MRxSmbRename  exit with status=%08lx\n", Status ));
    return(Status);
}


NTSTATUS
MRxSmbBuildRename (
    PSMBSTUFFER_BUFFER_STATE StufferState
    )
/*++

Routine Description:

   This builds a Rename SMB. we don't have to worry about login id and such
   since that is done by the connection engine....pretty neat huh? all we have to do
   is to format up the bits.

Arguments:

   StufferState - the state of the smbbuffer from the stuffer's point of view

Return Value:

   RXSTATUS
      SUCCESS
      NOT_IMPLEMENTED  something has appeared in the arguments that i can't handle

Notes:



--*/
{
    NTSTATUS Status;
    NTSTATUS StufferStatus;
    PRX_CONTEXT RxContext = StufferState->RxContext;
    RxCaptureFcb;RxCaptureFobx;

    PMRX_SRV_OPEN SrvOpen = capFobx->pSrvOpen;
    PMRX_SMB_SRV_OPEN smbSrvOpen = MRxSmbGetSrvOpenExtension(SrvOpen);

    PUNICODE_STRING RemainingName = GET_ALREADY_PREFIXED_NAME(SrvOpen,capFcb);

    PSMB_PSE_ORDINARY_EXCHANGE OrdinaryExchange = (PSMB_PSE_ORDINARY_EXCHANGE)StufferState->Exchange;

    PFILE_RENAME_INFORMATION RenameInformation = RxContext->Info.Buffer;
    UNICODE_STRING RenameName;
    USHORT SearchAttributes = SMB_FILE_ATTRIBUTE_SYSTEM | SMB_FILE_ATTRIBUTE_HIDDEN | SMB_FILE_ATTRIBUTE_DIRECTORY;

    PAGED_CODE();
    RxDbgTrace(+1, Dbg, ("MRxSmbBuildRename\n", 0 ));

    ASSERT( NodeType(SrvOpen) == RDBSS_NTC_SRVOPEN );

    RenameName.Buffer = &RenameInformation->FileName[0];
    RenameName.Length = (USHORT)RenameInformation->FileNameLength;

    if (RxContext->Info.FileInformationClass == FileRenameInformation) {
        COVERED_CALL(MRxSmbStartSMBCommand (StufferState,SetInitialSMB_ForReuse, SMB_COM_RENAME,
                                    SMB_REQUEST_SIZE(RENAME),
                                    NO_EXTRA_DATA,SMB_BEST_ALIGNMENT(1,0),RESPONSE_HEADER_SIZE_NOT_SPECIFIED,
                                    0,0,0,0 STUFFERTRACE(Dbg,'FC'))
                    );
    
        MRxSmbDumpStufferState (1100,"SMB w/ RENAME before stuffing",StufferState);
    
        MRxSmbStuffSMB (StufferState,
             "0wB",
                                        //  0         UCHAR WordCount;                    // Count of parameter words = 1
                 SearchAttributes,      //  w         _USHORT( SearchAttributes );
                 SMB_WCT_CHECK(1) 0     //  B         _USHORT( ByteCount );               // Count of data bytes = 0
                                        //            UCHAR Buffer[1];                    // Buffer containing:
                                        //            //UCHAR BufferFormat1;              //  0x04 -- ASCII
                                        //            //UCHAR OldFileName[];              //  Old file name
                                        //            //UCHAR BufferFormat2;              //  0x04 -- ASCII
                                        //            //UCHAR NewFileName[];              //  New file name
                 );
    } else {
        COVERED_CALL(MRxSmbStartSMBCommand (StufferState,SetInitialSMB_ForReuse, SMB_COM_NT_RENAME,
                                    SMB_REQUEST_SIZE(NTRENAME),
                                    NO_EXTRA_DATA,SMB_BEST_ALIGNMENT(1,0),RESPONSE_HEADER_SIZE_NOT_SPECIFIED,
                                    0,0,0,0 STUFFERTRACE(Dbg,'FC'))
                    );
    
        MRxSmbDumpStufferState (1100,"SMB w/ NTRENAME before stuffing",StufferState);
    
        MRxSmbStuffSMB (StufferState,
             "0wwdB",
                                              //  0         UCHAR WordCount;                    // Count of parameter words = 1
                 SearchAttributes,            //  w         _USHORT( SearchAttributes );
                 SMB_NT_RENAME_SET_LINK_INFO, //  w         _USHORT( InformationLevel );
                 0,                           //  d         _ULONG( ClusterCount );
                 SMB_WCT_CHECK(4) 0           //  B         _USHORT( ByteCount );               // Count of data bytes = 0
                                              //            UCHAR Buffer[1];                    // Buffer containing:
                                              //            //UCHAR BufferFormat1;              //  0x04 -- ASCII
                                              //            //UCHAR OldFileName[];              //  Old file name
                                              //            //UCHAR BufferFormat2;              //  0x04 -- ASCII
                                              //            //UCHAR NewFileName[];              //  New file name
                 );
    }
    
    //CODE.IMPROVEMENT we don't need to copy here, we can just Mdl like in writes
    //                 of course, this causes a problem later for an NCB rdr in that
    //                 you can't andX without copying....also, the stuffer would probably
    //                 get confused
    //Code.IMPROVEMENT since you know that you're gonna copy, we might as well
    //                 include this earlier unless we want to MDL it in
    Status = MRxSmbStuffSMB (StufferState,
                                    "44!", RemainingName, &RenameName );

    MRxSmbDumpStufferState (700,"SMB w/ RENAME after stuffing",StufferState);
    //ASSERT(!"Now it's stuffed");

FINALLY:
    RxDbgTraceUnIndent(-1,Dbg);
    return(Status);

}

NTSTATUS
MRxSmbBuildDeleteForRename (
    PSMBSTUFFER_BUFFER_STATE StufferState
    )
/*++

Routine Description:

   This builds a Delete SMB. we don't have to worry about login id and such
   since that is done by the connection engine....pretty neat huh? all we have to do
   is to format up the bits.

Arguments:

   StufferState - the state of the smbbuffer from the stuffer's point of view

Return Value:

   RXSTATUS
      SUCCESS
      NOT_IMPLEMENTED  something has appeared in the arguments that i can't handle

Notes:



--*/
{
    NTSTATUS Status;
    NTSTATUS StufferStatus;
    PRX_CONTEXT RxContext = StufferState->RxContext;
    RxCaptureFcb;RxCaptureFobx;

    PMRX_SRV_OPEN SrvOpen = capFobx->pSrvOpen;
    PMRX_SMB_SRV_OPEN smbSrvOpen = MRxSmbGetSrvOpenExtension(SrvOpen);

    PSMB_PSE_ORDINARY_EXCHANGE OrdinaryExchange = (PSMB_PSE_ORDINARY_EXCHANGE)StufferState->Exchange;

    PFILE_RENAME_INFORMATION RenameInformation = RxContext->Info.Buffer;
    UNICODE_STRING RenameName;
    ULONG SearchAttributes = SMB_FILE_ATTRIBUTE_SYSTEM | SMB_FILE_ATTRIBUTE_HIDDEN;  // a la rdr1

    PAGED_CODE();
    RxDbgTrace(+1, Dbg, ("MRxSmbBuild Delete 4RENAME\n", 0 ));

    ASSERT( NodeType(SrvOpen) == RDBSS_NTC_SRVOPEN );

    RenameName.Buffer = &RenameInformation->FileName[0];
    RenameName.Length = (USHORT)RenameInformation->FileNameLength;


    COVERED_CALL(MRxSmbStartSMBCommand (StufferState,SetInitialSMB_ForReuse,SMB_COM_DELETE,
                                SMB_REQUEST_SIZE(DELETE),
                                NO_EXTRA_DATA,SMB_BEST_ALIGNMENT(1,0),RESPONSE_HEADER_SIZE_NOT_SPECIFIED,
                                0,0,0,0 STUFFERTRACE(Dbg,'FC'))
                 );

    MRxSmbDumpStufferState (1100,"SMB  Delete 4RENAME before stuffing",StufferState);

    //CODE.IMPROVEMENT if this is truly core, we have to copy the name since it's in UNICODE
    //                 otherwise, we don't need to copy the name here, we can just Mdl like in writes
    //                 on the other hand, if it's NT<-->NT we don't do it here anyway
    MRxSmbStuffSMB (StufferState,
         "0wB4!",
                                    //  0         UCHAR WordCount;                    // Count of parameter words = 1
                SearchAttributes,   //  w         _USHORT( SearchAttributes );
                SMB_WCT_CHECK(1)    //  B         _USHORT( ByteCount );               // Count of data bytes; min = 2
                                    //            UCHAR Buffer[1];                    // Buffer containing:
                &RenameName         //  4         //UCHAR BufferFormat;               //  0x04 -- ASCII
                                    //            //UCHAR FileName[];                 //  File name
            );

    MRxSmbDumpStufferState (700,"SMB w/ Delete 4RENAME after stuffing",StufferState);
    //ASSERT(!"Now it's stuffed");

FINALLY:
    RxDbgTraceUnIndent(-1,Dbg);
    return(Status);

}

NTSTATUS
SmbPseExchangeStart_Rename(
    SMBPSE_ORDINARY_EXCHANGE_ARGUMENT_SIGNATURE
      )
/*++

Routine Description:

    This is the start routine for rename and downlevel delete.

Arguments:

    pExchange - the exchange instance

Return Value:

    RXSTATUS - The return status for the operation

--*/
{
    NTSTATUS Status = RX_MAP_STATUS(NOT_IMPLEMENTED);
    PSMBSTUFFER_BUFFER_STATE StufferState = &OrdinaryExchange->AssociatedStufferState;

    RxCaptureFcb; RxCaptureFobx;
    PMRX_SRV_OPEN SrvOpen = RxContext->pRelevantSrvOpen;
    PMRX_SMB_SRV_OPEN smbSrvOpen = MRxSmbGetSrvOpenExtension(SrvOpen);
    
    PUNICODE_STRING RemainingName = GET_ALREADY_PREFIXED_NAME(SrvOpen,capFcb);

    PMRX_SMB_FOBX smbFobx = MRxSmbGetFileObjectExtension(capFobx);
    NODE_TYPE_CODE TypeOfOpen = NodeType(capFcb);

    PSMBCE_SERVER pServer = SmbCeGetExchangeServer(OrdinaryExchange);
    ULONG SmbLength;

    PAGED_CODE();

    RxDbgTrace(+1, Dbg, ("SmbPseExchangeStart_Rename\n", 0 ));

    ASSERT(OrdinaryExchange->Type == ORDINARY_EXCHANGE);
    ASSERT(!FlagOn(RxContext->Flags,RX_CONTEXT_FLAG_ASYNC_OPERATION));

    //first we have to close the fid....if it's a directory, we close the search handle as well
    //CODE.IMPROVEMENT do we have to do that for NT servers.....or will the server close them auto.

    MRxSmbSetInitialSMB( StufferState STUFFERTRACE(Dbg,'FC') );
    ASSERT (StufferState->CurrentCommand == SMB_COM_NO_ANDX_COMMAND);

    if( (TypeOfOpen==RDBSS_NTC_STORAGE_TYPE_DIRECTORY)
            &&  FlagOn(smbFobx->Enumeration.Flags,SMBFOBX_ENUMFLAG_SEARCH_HANDLE_OPEN)  ){
        // we have a search handle open.....close it
        NTSTATUS Status2 = MRxSmbBuildFindClose(StufferState);

        if (Status2 == RX_MAP_STATUS(SUCCESS)) {
            Status = SmbPseOrdinaryExchange(SMBPSE_ORDINARY_EXCHANGE_ARGUMENTS,
                                            SMBPSE_OETYPE_FINDCLOSE
                                            );
        }

        ClearFlag(smbFobx->Enumeration.Flags,SMBFOBX_ENUMFLAG_SEARCH_HANDLE_OPEN);
        ClearFlag(smbFobx->Enumeration.Flags,SMBFOBX_ENUMFLAG_SEARCH_NOT_THE_FIRST);

        if (smbFobx->Enumeration.ResumeInfo!=NULL) {
            RxFreePool(smbFobx->Enumeration.ResumeInfo);
            smbFobx->Enumeration.ResumeInfo = NULL;
        }
    }

    if (!FlagOn(smbSrvOpen->Flags,SMB_SRVOPEN_FLAG_NOT_REALLY_OPEN)) {
        COVERED_CALL(MRxSmbBuildClose(StufferState));

        // we also get here when hardlink is being created. We want to
        // set the rename flag only when the file is really renamed
        // otherwise other operations such as flush etc. start to fail because 
        // the flag indicates that the file has been renamed when it isn't.
        if(RxContext->Info.FileInformationClass == FileRenameInformation)
        {
            SetFlag(SrvOpen->Flags,SRVOPEN_FLAG_FILE_RENAMED);
        }
        
        Status = SmbPseOrdinaryExchange(SMBPSE_ORDINARY_EXCHANGE_ARGUMENTS,
                                        SMBPSE_OETYPE_CLOSE
                                        );

        SetFlag(smbSrvOpen->Flags,SMB_SRVOPEN_FLAG_NOT_REALLY_OPEN);
    }

    MRxSmbSetInitialSMB(StufferState STUFFERTRACE(Dbg,'FC'));

    //
    // the fid is now closed and we are almost ready to do the rename. first, tho, we have
    // to check for ReplaceIfExists. our implementation here is the same as rdr1....we pop out
    // a smb_com_delete, which only works for a file. be like mike!! remember to ignore any errors....

    if (0) {
        DbgPrint("RxContext->Info.ReplaceIfExists %08lx %02lx\n",
                      &RxContext->Info.ReplaceIfExists,
                      RxContext->Info.ReplaceIfExists);
        if (0) {
            //DbgBreakPoint();
        }
    }

    if (RxContext->Info.ReplaceIfExists) {
        NTSTATUS DeleteStatus;
        PFILE_RENAME_INFORMATION RenameInformation = RxContext->Info.Buffer;
        UNICODE_STRING RenameName;
        BOOLEAN CaseInsensitive;

        CaseInsensitive= BooleanFlagOn(capFcb->pNetRoot->pSrvCall->Flags,SRVCALL_FLAG_CASE_INSENSITIVE_FILENAMES);
        RenameName.Buffer = &RenameInformation->FileName[0];
        RenameName.Length = (USHORT)RenameInformation->FileNameLength;

        // We cannot delete the file that is renamed as its own.
        if (RtlCompareUnicodeString(RemainingName,
                                    &RenameName,
                                    CaseInsensitive)) {
            DeleteStatus = MRxSmbBuildDeleteForRename(StufferState);
            if (DeleteStatus==STATUS_SUCCESS) {

                DeleteStatus = SmbPseOrdinaryExchange(SMBPSE_ORDINARY_EXCHANGE_ARGUMENTS,
                                                      SMBPSE_OETYPE_DELETE_FOR_RENAME);
            }
        } else {
            if ( !CaseInsensitive || (CaseInsensitive &&
                 !RtlCompareUnicodeString(RemainingName,&RenameName,FALSE)) ) {
                    Status = STATUS_SUCCESS;
                    goto FINALLY;
            }
        }
    }

    //
    // now do the rename..........

    Status = MRxSmbBuildRename(StufferState);
    SmbLength = (ULONG)(StufferState->CurrentPosition - StufferState->BufferBase);
    if ( (Status == STATUS_BUFFER_OVERFLOW)
                 || (SmbLength>pServer->MaximumBufferSize) ){
        RxDbgTrace(0, Dbg, ("MRxSmbRename - name too long\n", 0 ));
        Status = STATUS_OBJECT_NAME_INVALID;
    }

    if (Status!=STATUS_SUCCESS) {
        goto FINALLY;
    }

    Status = SmbPseOrdinaryExchange(SMBPSE_ORDINARY_EXCHANGE_ARGUMENTS,
                                    SMBPSE_OETYPE_RENAME
                                    );

FINALLY:
    RxDbgTrace(-1, Dbg, ("SmbPseExchangeStart_Rename exit w %08lx\n", Status ));
    return Status;
}

#if 0
NTSTATUS
MRxSmbFinishRename (
      PSMB_PSE_ORDINARY_EXCHANGE  OrdinaryExchange,
      PRESP_RENAME                 Response
      )
/*++

Routine Description:

    This routine actually gets the stuff out of the Rename response and finishes the close.

Arguments:

    OrdinaryExchange - the exchange instance
    Response - the response

Return Value:

    RXSTATUS - The return status for the operation

--*/
{
    NTSTATUS Status = RX_MAP_STATUS(SUCCESS);
    PMRX_SRV_OPEN SrvOpen = capFobx->pSrvOpen;
    PMRX_SMB_SRV_OPEN smbSrvOpen = MRxSmbGetSrvOpenExtension(SrvOpen);


    PAGED_CODE();

    RxDbgTrace(+1, Dbg, ("MRxSmbFinishRename\n", 0 ));
    SmbPseOEAssertConsistentLinkageFromOE("MRxSmbFinishRename:");

    if (Response->WordCount != 0 ||
        SmbGetUshort(&Response->ByteCount) != 0) {
        Status = STATUS_INVALID_NETWORK_RESPONSE;
        OrdinaryExchange->Status = STATUS_INVALID_NETWORK_RESPONSE;
    } else {
        smbSrvOpen->Fid = 0xffff;
    }

    RxDbgTrace(-1, Dbg, ("MRxSmbFinishRename   returning %08lx\n", Status ));
    return Status;
}
#endif

extern UNICODE_STRING MRxSmbAll8dot3Files;

NTSTATUS
MRxSmbBuildCheckEmptyDirectory (
    PSMBSTUFFER_BUFFER_STATE StufferState
    )
/*++

Routine Description:

   This builds a FindFirst SMB.

Arguments:

   StufferState - the state of the smbbuffer from the stuffer's point of view

Return Value:

   RXSTATUS
      SUCCESS
      NOT_IMPLEMENTED  something has appeared in the arguments that i can't handle

Notes:



--*/
{
    NTSTATUS Status;

    PRX_CONTEXT RxContext = StufferState->RxContext;
    RxCaptureFcb;

    PUNICODE_STRING RemainingName = GET_ALREADY_PREFIXED_NAME_FROM_CONTEXT(RxContext);

    PSMB_PSE_ORDINARY_EXCHANGE OrdinaryExchange = (PSMB_PSE_ORDINARY_EXCHANGE)StufferState->Exchange;
    ULONG ResumeKeyLength = 0;

    UNICODE_STRING FindFirstPattern;

    // SearchAttributes is hardcoded to the magic number 0x16  CODE.IMPROVEMENT.ASHAMED use a macro!!!
    ULONG SearchAttributes =
            (SMB_FILE_ATTRIBUTE_DIRECTORY
                | SMB_FILE_ATTRIBUTE_SYSTEM | SMB_FILE_ATTRIBUTE_HIDDEN);

    PAGED_CODE();

    RxDbgTrace(+1, Dbg, ("MRxSmbBuildCheckEmptyDirectory \n"));

    if (OrdinaryExchange->Info.CoreSearch.EmptyCheckResumeKey == NULL) {
        PUNICODE_STRING DirectoryName = RemainingName;
        PUNICODE_STRING Template = &MRxSmbAll8dot3Files;
        ULONG DirectoryNameLength,TemplateLength,AllocationLength;
        PBYTE SmbFileName;

        //the stuffer cannot handle the intricate logic here so we
        //will have to preallocate for the name

        DirectoryNameLength = DirectoryName->Length;
        TemplateLength = Template->Length;
        AllocationLength = sizeof(WCHAR)  // backslash separator
                            +DirectoryNameLength
                            +TemplateLength;
        RxDbgTrace(0, Dbg, ("  --> d/t/dl/tl/al <%wZ><%wZ>%08lx/%08lx/%08lx!\n",
                      DirectoryName,Template,
                      DirectoryNameLength,TemplateLength,AllocationLength));

        FindFirstPattern.Buffer = (PWCHAR)RxAllocatePoolWithTag( PagedPool,AllocationLength,'0SxR');
        if (FindFirstPattern.Buffer==NULL) {
            RxDbgTrace(0, Dbg, ("  --> Couldn't get the findfind pattern buffer!\n"));
            Status = STATUS_INSUFFICIENT_RESOURCES;
            goto FINALLY;
        }

        SmbFileName = (PBYTE)FindFirstPattern.Buffer;
        RtlCopyMemory(SmbFileName,DirectoryName->Buffer,DirectoryNameLength);
        SmbFileName += DirectoryNameLength;
        if (*((PWCHAR)(SmbFileName-sizeof(WCHAR))) != L'\\') {
            *((PWCHAR)SmbFileName) = L'\\'; SmbFileName+= sizeof(WCHAR);
        }
        RtlCopyMemory(SmbFileName,Template->Buffer,TemplateLength);
        SmbFileName += TemplateLength;
        if ((TemplateLength == sizeof(WCHAR)) && (Template->Buffer[0]==DOS_STAR)) {
            *((PWCHAR)SmbFileName) = L'.'; SmbFileName+= sizeof(WCHAR);
            *((PWCHAR)SmbFileName) = L'*'; SmbFileName+= sizeof(WCHAR);
        }
        //*((PWCHAR)SmbFileName) = 0; SmbFileName+= sizeof(WCHAR); //trailing NULL;
        //CODE.IMPROVEMENT we should potentially 8.3ize the string here
        FindFirstPattern.Length = (USHORT)(SmbFileName - (PBYTE)FindFirstPattern.Buffer);
        RxDbgTrace(0, Dbg, ("  --> find1stpattern <%wZ>!\n",&FindFirstPattern));
    } else {
        ResumeKeyLength = sizeof(SMB_RESUME_KEY);
        FindFirstPattern.Buffer = NULL;
        FindFirstPattern.Length = 0;
    }


    ASSERT( StufferState );

    COVERED_CALL(MRxSmbStartSMBCommand (StufferState,SetInitialSMB_Never, SMB_COM_SEARCH,
                                SMB_REQUEST_SIZE(SEARCH),
                                NO_EXTRA_DATA,SMB_BEST_ALIGNMENT(1,0),RESPONSE_HEADER_SIZE_NOT_SPECIFIED,
                                0,0,0,0 STUFFERTRACE(Dbg,'FC'))
                 );

    MRxSmbDumpStufferState (1100,"SMB w/ core search before stuffing",StufferState);

    MRxSmbStuffSMB (StufferState,
         "0wwB4ywc!",
                                    //  0         UCHAR WordCount;                    // Count of parameter words = 2
               3,                   //  w         _USHORT( MaxCount );                // Number of dir. entries to return
               SearchAttributes,    //  w         _USHORT( SearchAttributes );
               SMB_WCT_CHECK(2)     //  B         _USHORT( ByteCount );               // Count of data bytes; min = 5
                                    //            UCHAR Buffer[1];                    // Buffer containing:
               &FindFirstPattern,   //  4        //UCHAR BufferFormat1;              //  0x04 -- ASCII
                                    //            //UCHAR FileName[];                 //  File name, may be null
               0x05,                //  y         //UCHAR BufferFormat2;              //  0x05 -- Variable block
               ResumeKeyLength,     //  w         //USHORT ResumeKeyLength;           //  Length of resume key, may be 0
                                    //  c
               ResumeKeyLength,OrdinaryExchange->Info.CoreSearch.EmptyCheckResumeKey
             );


    MRxSmbDumpStufferState (700,"SMB w/ core search for checkempty after stuffing",StufferState);
    //ASSERT(!"Now it's stuffed");


FINALLY:
    if (FindFirstPattern.Buffer != NULL) {
        RxFreePool(FindFirstPattern.Buffer);
    }

    RxDbgTrace(-1, Dbg, ("MRxSmbBuildCheckEmptyDirectory exiting.......st=%08lx\n",Status));
    return(Status);
}

NTSTATUS
SmbPseExchangeStart_SetDeleteDisposition(
    SMBPSE_ORDINARY_EXCHANGE_ARGUMENT_SIGNATURE
      )
/*++

Routine Description:

    This is the start routine for SetDeleteDisposition and downlevel delete. This only thing that happens here
    is that we check for an empty directory. On core, this is harder than you think. what we do is to try to get three
    entries. if the directory is empty, we will get only two . and ..; since we do not know whether the server just terminated
    early or whether those are the only two, we go again. we do this until either we get a name that is not . or .. or until
    NO_MORE_FILES is returned. sigh..................

Arguments:

    pExchange - the exchange instance

Return Value:

    RXSTATUS - The return status for the operation

--*/
{
    NTSTATUS Status = RX_MAP_STATUS(NOT_IMPLEMENTED);
    PSMBSTUFFER_BUFFER_STATE StufferState = &OrdinaryExchange->AssociatedStufferState;

    RxCaptureFcb; RxCaptureFobx;
    PMRX_SRV_OPEN SrvOpen = capFobx->pSrvOpen;
    PMRX_SMB_FOBX smbFobx = MRxSmbGetFileObjectExtension(capFobx);
    NODE_TYPE_CODE TypeOfOpen = NodeType(capFcb);

    PSMBCE_SERVER pServer = SmbCeGetExchangeServer(OrdinaryExchange);
    ULONG SmbLength;

    PAGED_CODE();
    RxDbgTrace(+1, Dbg, ("SmbPseExchangeStart_SetDeleteDisposition\n", 0 ));

    ASSERT_ORDINARY_EXCHANGE(OrdinaryExchange);

    ASSERT(!FlagOn(RxContext->Flags,RX_CONTEXT_FLAG_ASYNC_OPERATION));
    ASSERT (OrdinaryExchange->Info.CoreSearch.EmptyCheckResumeKey == NULL);

    for (;;) {
        MRxSmbSetInitialSMB(StufferState STUFFERTRACE(Dbg,'FC')); //CODE.IMPROVEMENT do this in the buildroutine

        Status = MRxSmbBuildCheckEmptyDirectory(StufferState);
        SmbLength = (ULONG)(StufferState->CurrentPosition - StufferState->BufferBase);
        if ( (Status == RX_MAP_STATUS(BUFFER_OVERFLOW))
                     || (SmbLength>pServer->MaximumBufferSize) ){
            RxDbgTrace(-1, Dbg, ("MRxSmbSetDeleteDisposition - name too long\n", 0 ));
            return(RX_MAP_STATUS(OBJECT_NAME_INVALID));
        } else if ( Status != RX_MAP_STATUS(SUCCESS) ){
            goto FINALLY;
        }

        Status = SmbPseOrdinaryExchange(SMBPSE_ORDINARY_EXCHANGE_ARGUMENTS,
                                        SMBPSE_OETYPE_CORESEARCHFORCHECKEMPTY
                                        );
        //
        // if success is returned with a resume key then we have to go again

        if ( (Status == RX_MAP_STATUS(SUCCESS)) && (OrdinaryExchange->Info.CoreSearch.EmptyCheckResumeKey != NULL) ) continue;
        break;
    }

    //
    // this is pretty strange. if it succeeds, then fail the empty check. similarly, if the search
    // fails with the right status...succeeed the check. otherwise fail

FINALLY:
    if (Status == RX_MAP_STATUS(SUCCESS)) {
        Status = RX_MAP_STATUS(DIRECTORY_NOT_EMPTY);
    } else if (Status == RX_MAP_STATUS(NO_MORE_FILES)) {
        Status = RX_MAP_STATUS(SUCCESS);
    }

    RxDbgTrace(-1, Dbg, ("SmbPseExchangeStart_SetDeleteDisposition exit w %08lx\n", Status ));
    return Status;
}


MRxSmbSetDeleteDisposition(
      IN PRX_CONTEXT            RxContext
      )
/*++

Routine Description:

   This routine does a delete for downlevel.

   It is impossible to provide exact NTish semantics on a core server. So, all we do here is to ensure that
   a directory is empty. The actual delete happens when on the last close.


Arguments:

    RxContext - the RDBSS context

Return Value:

    RXSTATUS - The return status for the operation

--*/
{
    NTSTATUS Status = RX_MAP_STATUS(SUCCESS);
    PUNICODE_STRING RemainingName;
    RxCaptureFcb; RxCaptureFobx;

    PSMB_PSE_ORDINARY_EXCHANGE OrdinaryExchange;

    PAGED_CODE();


    RxDbgTrace(+1, Dbg, ("MRxSmbSetDeleteDisposition\n", 0 ));

    ASSERT( NodeType(capFobx->pSrvOpen) == RDBSS_NTC_SRVOPEN );

    if (NodeType(capFcb) != RDBSS_NTC_STORAGE_TYPE_DIRECTORY ) {
        RxDbgTrace(-1, Dbg, ("MRxSmbSetDeleteDisposition not a directory!\n"));
        return(RX_MAP_STATUS(SUCCESS));
    }

    Status = SmbPseCreateOrdinaryExchange(RxContext,
                                                    capFobx->pSrvOpen->pVNetRoot,
                                                    SMBPSE_OE_FROM_FAKESETDELETEDISPOSITION,
                                                    SmbPseExchangeStart_SetDeleteDisposition,
                                                    &OrdinaryExchange
                                                    );
    if (Status != STATUS_SUCCESS) {
        RxDbgTrace(-1, Dbg, ("Couldn't get the smb buf!\n"));
        return(Status);
    }

    Status = SmbPseInitiateOrdinaryExchange(OrdinaryExchange);

    ASSERT (Status != RX_MAP_STATUS(PENDING));

    SmbPseFinalizeOrdinaryExchange(OrdinaryExchange);

    RxDbgTrace(-1, Dbg, ("MRxSmbSetDeleteDisposition  exit with status=%08lx\n", Status ));
    return(Status);

}