161 lines
3.4 KiB
C
161 lines
3.4 KiB
C
/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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Except.c
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Abstract:
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This module implements the exception handling for the NetWare
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redirector called by the dispatch driver.
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Author:
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Colin Watson [ColinW] 19-Dec-1992
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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_CATCH_EXCEPTIONS)
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#if 0 // Not pageable
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NwExceptionFilter
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NwProcessException
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#endif
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LONG
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NwExceptionFilter (
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IN PIRP Irp,
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IN PEXCEPTION_POINTERS ExceptionPointer
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)
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/*++
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Routine Description:
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This routine is used to decide if we should or should not handle
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an exception status that is being raised. It inserts the status
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into the IrpContext and either indicates that we should handle
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the exception or bug check the system.
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Arguments:
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ExceptionCode - Supplies the exception code to being checked.
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Return Value:
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ULONG - returns EXCEPTION_EXECUTE_HANDLER or bugchecks
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--*/
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{
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NTSTATUS ExceptionCode;
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#ifdef NWDBG
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PVOID ExceptionAddress;
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ExceptionAddress = ExceptionPointer->ExceptionRecord->ExceptionAddress;
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#endif
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ExceptionCode = ExceptionPointer->ExceptionRecord->ExceptionCode;
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DebugTrace(0, DEBUG_TRACE_UNWIND, "NwExceptionFilter %X\n", ExceptionCode);
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#ifdef NWDBG
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DebugTrace(0, DEBUG_TRACE_UNWIND, " %X\n", ExceptionAddress);
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#endif
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//
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// If the exception is STATUS_IN_PAGE_ERROR, get the I/O error code
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// from the exception record.
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//
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if (ExceptionCode == STATUS_IN_PAGE_ERROR) {
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if (ExceptionPointer->ExceptionRecord->NumberParameters >= 3) {
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ExceptionCode = (NTSTATUS) ExceptionPointer->ExceptionRecord->ExceptionInformation[2];
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}
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}
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if (FsRtlIsNtstatusExpected( ExceptionCode )) {
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DebugTrace(0, DEBUG_TRACE_UNWIND, "Exception expected\n", 0);
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return EXCEPTION_EXECUTE_HANDLER;
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} else {
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return EXCEPTION_CONTINUE_SEARCH;
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}
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}
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NTSTATUS
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NwProcessException (
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IN PIRP_CONTEXT IrpContext,
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IN NTSTATUS ExceptionCode
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)
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/*++
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Routine Description:
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This routine process an exception. It either completes the request
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with the saved exception status or it sends it off to IoRaiseHardError()
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Arguments:
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IrpContext - Supplies the Irp being processed
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ExceptionCode - Supplies the normalized exception status being handled
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Return Value:
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NTSTATUS - Returns the results of either posting the Irp or the
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saved completion status.
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--*/
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{
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NTSTATUS Status;
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PIRP Irp;
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DebugTrace(0, Dbg, "NwProcessException\n", 0);
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Irp = IrpContext->pOriginalIrp;
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Irp->IoStatus.Status = ExceptionCode;
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//
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// If the error is a hard error, or verify required, then we will complete
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// it if this is a recursive Irp, or with a top-level Irp, either send
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// it to the Fsp for verification, or send it to IoRaiseHardError, who
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// will deal with it.
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//
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if (ExceptionCode == STATUS_CANT_WAIT) {
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Status = NwPostToFsp( IrpContext, TRUE );
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} else {
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//
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// We got an error, so zero out the information field before
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// completing the request if this was an input operation.
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// Otherwise IopCompleteRequest will try to copy to the user's buffer.
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//
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if ( FlagOn(Irp->Flags, IRP_INPUT_OPERATION) ) {
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Irp->IoStatus.Information = 0;
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}
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Status = ExceptionCode;
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}
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return Status;
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}
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