757 lines
22 KiB
C++
757 lines
22 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2000 Microsoft Corporation
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//
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// Module Name:
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// StartupNotify.cpp
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//
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// Description:
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// This file contains the implementation of the CStartupNotify
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// class.
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//
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// Documentation:
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// TODO: fill in pointer to external documentation
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//
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// Header File:
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// StartupNotify.h
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//
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// Maintained By:
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// Vij Vasu (VVasu) 15-JUN-2000
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//
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// Include Files
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//////////////////////////////////////////////////////////////////////////////
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// The precompiled header for this library
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#include "pch.h"
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// The header file for this class
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#include "StartupNotify.h"
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// For POSTCONFIG_COMPLETE_EVENT_NAME
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#include "EventName.h"
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//////////////////////////////////////////////////////////////////////////////
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// Macro Definitions
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//////////////////////////////////////////////////////////////////////////////
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DEFINE_THISCLASS( "CStartupNotify" );
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//////////////////////////////////////////////////////////////////////////////
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//++
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//
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// CStartupNotify::CStartupNotify()
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//
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// Description:
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// Constructor of the CStartupNotify class. This initializes
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// the m_cRef variable to 1 instead of 0 to account of possible
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// QueryInterface failure in DllGetClassObject.
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//
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// Arguments:
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// None.
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//
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// Return Value:
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// None.
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//
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// Remarks:
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// None.
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//
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//--
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//////////////////////////////////////////////////////////////////////////////
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CStartupNotify::CStartupNotify( void )
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: m_cRef( 1 )
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{
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TraceFunc( "" );
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// Increment the count of components in memory so the DLL hosting this
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// object cannot be unloaded.
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InterlockedIncrement( &g_cObjects );
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TraceFlow1( "Component count = %d.", g_cObjects );
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TraceFuncExit();
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} //*** CStartupNotify::CStartupNotify
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//////////////////////////////////////////////////////////////////////////////
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//++
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//
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// CStartupNotify::~CStartupNotify()
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//
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// Description:
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// Destructor of the CStartupNotify class.
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//
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// Arguments:
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// None.
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//
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// Return Value:
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// None.
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//
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// Remarks:
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// None.
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//
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//--
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//////////////////////////////////////////////////////////////////////////////
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CStartupNotify::~CStartupNotify( void )
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{
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TraceFunc( "" );
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// There's going to be one less component in memory. Decrement component count.
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InterlockedDecrement( &g_cObjects );
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TraceFlow1( "Component count = %d.", g_cObjects );
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TraceFuncExit();
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} //*** CStartupNotify::~CStartupNotify
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//////////////////////////////////////////////////////////////////////////////
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//++
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//
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// HRESULT
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// CStartupNotify::S_HrCreateInstance(
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// IUnknown ** ppunkOut
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// )
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//
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// Description:
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// Creates a CStartupNotify instance.
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//
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// Arguments:
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// ppunkOut
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// The IUnknown interface of the new object.
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//
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// Return Values:
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// S_OK
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// Success.
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//
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// E_OUTOFMEMORY
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// Not enough memory to create the object.
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//
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// other HRESULTs
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// Object initialization failed.
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//
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//--
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//////////////////////////////////////////////////////////////////////////////
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HRESULT
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CStartupNotify::S_HrCreateInstance( IUnknown ** ppunkOut )
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{
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TraceFunc( "" );
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HRESULT hr = E_INVALIDARG;
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CStartupNotify * pStartupNotify = NULL;
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do
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{
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// Allocate memory for the new object.
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pStartupNotify = new CStartupNotify();
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if ( pStartupNotify == NULL )
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{
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LogMsg( "Could not allocate memory for a evict cleanup object." );
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TraceFlow( "Could not allocate memory for a evict cleanup object." );
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hr = THR( E_OUTOFMEMORY );
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break;
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} // if: out of memory
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hr = THR( pStartupNotify->QueryInterface( IID_IUnknown, reinterpret_cast< void ** >( ppunkOut ) ) );
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TraceFlow1( "*ppunkOut = %#X.", *ppunkOut );
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}
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while( false ); // dummy do-while loop to avoid gotos.
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if ( pStartupNotify != NULL )
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{
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pStartupNotify->Release();
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} // if: the pointer to the notification object is not NULL
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HRETURN( hr );
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} //*** CStartupNotify::S_HrCreateInstance()
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//////////////////////////////////////////////////////////////////////////////
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//++
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//
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// STDMETHODIMP_( ULONG )
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// CStartupNotify::AddRef()
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//
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// Description:
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// Increment the reference count of this object by one.
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//
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// Arguments:
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// None.
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//
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// Return Value:
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// The new reference count.
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//
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// Remarks:
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// None.
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//
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//--
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//////////////////////////////////////////////////////////////////////////////
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STDMETHODIMP_( ULONG )
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CStartupNotify::AddRef( void )
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{
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TraceFunc( "[IUnknown]" );
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InterlockedIncrement( &m_cRef );
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TraceFlow1( "m_cRef = %d", m_cRef );
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RETURN( m_cRef );
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} //*** CStartupNotify::AddRef()
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//////////////////////////////////////////////////////////////////////////////
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//++
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//
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// STDMETHODIMP_( ULONG )
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// CStartupNotify::Release()
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//
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// Description:
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// Decrement the reference count of this object by one.
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//
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// Arguments:
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// None.
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//
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// Return Value:
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// The new reference count.
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//
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// Remarks:
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// None.
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//
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//--
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//////////////////////////////////////////////////////////////////////////////
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STDMETHODIMP_( ULONG )
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CStartupNotify::Release( void )
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{
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TraceFunc( "[IUnknown]" );
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InterlockedDecrement( &m_cRef );
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TraceFlow1( "m_cRef = %d", m_cRef );
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if ( m_cRef == 0 )
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{
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TraceDo( delete this );
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RETURN( 0 );
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} // if: reference count decremented to zero
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RETURN( m_cRef );
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} //*** CStartupNotify::Release()
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//////////////////////////////////////////////////////////////////////////////
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//++
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//
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// STDMETHODIMP
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// CStartupNotify::QueryInterface()
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//
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// Description:
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// Decrement the reference count of this object by one.
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//
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// Arguments:
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// IN REFIID riid
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// Id of interface requested.
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//
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// OUT void ** ppv
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// Pointer to the requested interface.
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//
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// Return Value:
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// S_OK
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// If the interface is available on this object.
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//
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// E_NOINTERFACE
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// If the interface is not available.
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//
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// Remarks:
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// None.
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//
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//--
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//////////////////////////////////////////////////////////////////////////////
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STDMETHODIMP
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CStartupNotify::QueryInterface( REFIID riid, void ** ppv )
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{
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TraceQIFunc( riid, ppv );
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HRESULT hr = S_OK;
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if ( ppv != NULL )
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{
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if ( IsEqualIID( riid, IID_IUnknown ) )
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{
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*ppv = static_cast< IClusCfgStartupNotify * >( this );
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} // if: IUnknown
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else if ( IsEqualIID( riid, IID_IClusCfgStartupNotify ) )
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{
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*ppv = TraceInterface( __THISCLASS__, IClusCfgStartupNotify, this, 0 );
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} // else if:
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else
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{
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hr = E_NOINTERFACE;
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} // else
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if ( SUCCEEDED( hr ) )
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{
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((IUnknown *) *ppv)->AddRef( );
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} // if: success
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else
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{
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*ppv = NULL;
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} // else: something failed
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} // if: the output pointer was valid
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else
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{
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hr = E_INVALIDARG;
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} // else: the output pointer is invalid
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QIRETURN( hr, riid );
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} //*** CStartupNotify::QueryInterface()
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//////////////////////////////////////////////////////////////////////////////
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//++
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//
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// CStartupNotify::SendNotifications()
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//
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// Description:
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// This method is called by the Cluster Service to inform the implementor
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// of this interface to send out notification of cluster service startup
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// to interested listeners. If this method is being called for the first
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// time, the method waits till the post configuration steps are complete
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// before sending out the notifications.
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//
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// Arguments:
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// None.
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//
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// Return Values:
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// S_OK
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// Success.
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//
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// Other HRESULTs
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// The call failed.
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//
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//--
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//////////////////////////////////////////////////////////////////////////////
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STDMETHODIMP
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CStartupNotify::SendNotifications( void )
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{
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TraceFunc( "[IClusCfgStartupNotify]" );
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HRESULT hr = S_OK;
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HANDLE heventPostCfgCompletion = NULL;
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do
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{
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//
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// If the cluster service is being started for the first time, as a part
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// of adding this node to a cluster (forming or joining), then we have
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// to wait till the post-configuration steps are completed before we
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// can send out notifications.
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//
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TraceFlow1( "Trying to create an event named '%s'.", POSTCONFIG_COMPLETE_EVENT_NAME );
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// Create an event in the signalled state. If this event already existed
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// we get a handle to that event, and the state of the event is not changed.
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heventPostCfgCompletion = CreateEvent(
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NULL // event security attributes
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, TRUE // manual-reset event
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, TRUE // create in signaled state
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, POSTCONFIG_COMPLETE_EVENT_NAME
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);
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if ( heventPostCfgCompletion == NULL )
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{
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hr = HRESULT_FROM_WIN32( TW32( GetLastError() ) );
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LogMsg( "Error %#x occurred trying to create an event named '%s'.", hr, POSTCONFIG_COMPLETE_EVENT_NAME );
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TraceFlow2( "Error %#x occurred trying to create an event named '%s'.", hr, POSTCONFIG_COMPLETE_EVENT_NAME );
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break;
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} // if: we could not get a handle to the event
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TraceFlow( "Waiting for the event to be signaled." );
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//
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// Now, wait for this event to be signaled. If this method was called due to this
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// node being part of a cluster, this event would have been created in the unsignaled state
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// by the cluster configuration server. However, if this was not the first time that
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// the cluster service is starting on this node, the event would have been created in the
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// signaled state above, and so, the wait below will exit immediately.
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//
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do
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{
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DWORD dwStatus;
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// Wait for any message sent or posted to this queue
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// or for our event to be signaled.
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dwStatus = MsgWaitForMultipleObjects(
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1
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, &heventPostCfgCompletion
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, FALSE
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, 900000 // If no one has signaled this event in 15 minutes, abort.
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, QS_ALLINPUT
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);
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// The result tells us the type of event we have.
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if ( dwStatus == ( WAIT_OBJECT_0 + 1 ) )
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{
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MSG msg;
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// Read all of the messages in this next loop,
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// removing each message as we read it.
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while ( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) != 0 )
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{
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// If it is a quit message, we are done pumping messages.
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if ( msg.message == WM_QUIT)
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{
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TraceFlow( "Get a WM_QUIT message. Exit message pump loop." );
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break;
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} // if: we got a WM_QUIT message
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// Otherwise, dispatch the message.
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DispatchMessage( &msg );
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} // while: there are still messages in the window message queue
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} // if: we have a message in the window message queue
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else
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{
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if ( dwStatus == WAIT_OBJECT_0 )
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{
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TraceFlow( "Our event has been signaled. Exiting wait loop." );
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break;
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} // else if: our event is signaled
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else
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{
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if ( dwStatus == -1 )
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{
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hr = HRESULT_FROM_WIN32( TW32( GetLastError() ) );
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LogMsg( "Error %#x occurred trying to wait for an event to be signaled.", hr );
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TraceFlow1( "Error %#x occurred trying to wait for an event to be signaled.", hr );
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} // if: MsgWaitForMultipleObjects() returned an error
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else
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{
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hr = THR( HRESULT_FROM_WIN32( dwStatus ) );
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LogMsg( "An error occurred trying to wait for an event to be signaled. Status code is %d.", dwStatus );
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TraceFlow1( "An error occurred trying to wait for an event to be signaled. Status code is %d.", dwStatus );
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} // else: an unexpected value was returned by MsgWaitForMultipleObjects()
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break;
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} // else: an unexpected result
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} // else: MsgWaitForMultipleObjects() exited for a reason other than a waiting message
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}
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while( true ); // do-while: loop infinitely
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if ( FAILED( hr ) )
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{
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TraceFlow( "Something went wrong trying to wait for the event to be signaled." );
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break;
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} // if: something has gone wrong
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TraceFlow( "Our event has been signaled. Proceed with the notifications." );
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// Send out the notifications
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hr = THR( HrNotifyListeners() );
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if ( FAILED( hr ) )
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{
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TraceFlow1( "Error %#x occurred trying to notify cluster startup listeners.", hr );
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LogMsg( "Error %#x occurred trying to notify cluster startup listeners.", hr );
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break;
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} // if: something went wrong while sending out notifications
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TraceFlow( "Sending of cluster startup notifications complete." );
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LogMsg( "Sending of cluster startup notifications complete." );
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}
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while( false ); // dummy do-while loop to avoid gotos
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//
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// Clean up
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//
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if ( heventPostCfgCompletion != NULL )
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{
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CloseHandle( heventPostCfgCompletion );
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} // if: we had created the event
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HRETURN( hr );
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} //*** CStartupNotify::SendNotifications()
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//////////////////////////////////////////////////////////////////////////////
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//++
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//
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// HRESULT
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// CStartupNotify::HrNotifyListeners
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//
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// Description:
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// Enumerate all components on the local computer registered for cluster
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// startup notification.
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//
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// Arguments:
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// None.
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//
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// Return Values:
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// S_OK
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// Success.
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//
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// other HRESULTs
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// Something went wrong during the enumeration.
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//
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//--
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//////////////////////////////////////////////////////////////////////////////
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HRESULT
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CStartupNotify::HrNotifyListeners( void )
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{
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TraceFunc( "" );
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const UINT uiCHUNK_SIZE = 16;
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HRESULT hr = S_OK;
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ICatInformation * pciCatInfo = NULL;
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IEnumCLSID * psleStartupListenerClsidEnum = NULL;
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IUnknown * punkResTypeServices = NULL;
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do
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{
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ULONG cReturned = 0;
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CATID rgCatIdsImplemented[ 1 ];
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rgCatIdsImplemented[ 0 ] = CATID_ClusCfgStartupListeners;
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//
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// Enumerate all the enumerators registered in the
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// CATID_ClusCfgStartupListeners category
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//
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hr = THR(
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CoCreateInstance(
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CLSID_StdComponentCategoriesMgr
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, NULL
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, CLSCTX_SERVER
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, IID_ICatInformation
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, reinterpret_cast< void ** >( &pciCatInfo )
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)
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);
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if ( FAILED( hr ) )
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{
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TraceFlow1( "Error %#x occurred trying to get a pointer to the enumerator of the CATID_ClusCfgStartupListeners category.", hr );
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LogMsg( "Error %#x occurred trying to get a pointer to the enumerator of the CATID_ClusCfgStartupListeners category.", hr );
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break;
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} // if: we could not get a pointer to the ICatInformation interface
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// Get a pointer to the enumerator of the CLSIDs that belong to the CATID_ClusCfgStartupListeners category.
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hr = THR(
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pciCatInfo->EnumClassesOfCategories(
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1
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, rgCatIdsImplemented
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, 0
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, NULL
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, &psleStartupListenerClsidEnum
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)
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);
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if ( FAILED( hr ) )
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{
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TraceFlow1( "Error %#x occurred trying to get a pointer to the enumerator of the CATID_ClusCfgStartupListeners category.", hr );
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LogMsg( "Error %#x occurred trying to get a pointer to the enumerator of the CATID_ClusCfgStartupListeners category.", hr );
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break;
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} // if: we could not get a pointer to the IEnumCLSID interface
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//
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// Create an instance of the resource type services component
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//
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hr = THR(
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CoCreateInstance(
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CLSID_ClusCfgResTypeServices
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, NULL
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, CLSCTX_INPROC_SERVER
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, __uuidof( punkResTypeServices )
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, reinterpret_cast< void ** >( &punkResTypeServices )
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)
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);
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if ( FAILED( hr ) )
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{
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TraceFlow1( "Error %#x occurred trying to create the resource type services component.", hr );
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LogMsg( "Error %#x occurred trying to create the resource type services component.", hr );
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break;
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} // if: we could not create the resource type services component
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// Enumerate the CLSIDs of the registered startup listeners
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do
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{
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CLSID rgStartupListenerClsids[ uiCHUNK_SIZE ];
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ULONG idxCLSID;
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|
cReturned = 0;
|
|
hr = STHR(
|
|
psleStartupListenerClsidEnum->Next(
|
|
uiCHUNK_SIZE
|
|
, rgStartupListenerClsids
|
|
, &cReturned
|
|
)
|
|
);
|
|
|
|
if ( FAILED( hr ) )
|
|
{
|
|
TraceFlow1( "Error %#x occurred trying enumerate startup listener components.", hr );
|
|
LogMsg( "Error %#x occurred trying enumerate startup listener components.", hr );
|
|
break;
|
|
} // if: we could not get the next set of CLSIDs
|
|
|
|
// hr may be S_FALSE here, so reset it.
|
|
hr = S_OK;
|
|
|
|
for ( idxCLSID = 0; idxCLSID < cReturned; ++idxCLSID )
|
|
{
|
|
hr = THR( HrProcessListener( rgStartupListenerClsids[ idxCLSID ], punkResTypeServices ) );
|
|
|
|
if ( FAILED( hr ) )
|
|
{
|
|
// The processing of one of the listeners failed.
|
|
// Log the error, but continue processing other listeners.
|
|
TraceFlow1( "Error %#x occurred trying to process a cluster startup listener. Other listeners will be processed.", hr );
|
|
TraceMsgGUID( mtfALWAYS, "The CLSID of the failed listener is ", rgStartupListenerClsids[ idxCLSID ] );
|
|
LogMsg( "Error %#x occurred trying to process a cluster startup listener. Other listeners will be processed.", hr );
|
|
hr = S_OK;
|
|
} // if: this enumerator failed
|
|
} // for: iterate through the returned CLSIDs
|
|
}
|
|
while( cReturned > 0 ); // while: there are still CLSIDs to be enumerated
|
|
|
|
if ( FAILED( hr ) )
|
|
{
|
|
break;
|
|
} // if: something went wrong in the loop above
|
|
}
|
|
while( false ); // dummy do-while loop to avoid gotos.
|
|
|
|
//
|
|
// Cleanup code
|
|
//
|
|
|
|
if ( pciCatInfo != NULL )
|
|
{
|
|
pciCatInfo->Release();
|
|
} // if: we had obtained a pointer to the ICatInformation interface
|
|
|
|
if ( psleStartupListenerClsidEnum != NULL )
|
|
{
|
|
psleStartupListenerClsidEnum->Release();
|
|
} // if: we had obtained a pointer to the enumerator of startup listener CLSIDs
|
|
|
|
if ( punkResTypeServices != NULL )
|
|
{
|
|
punkResTypeServices->Release();
|
|
} // if: we had created the resource type services component
|
|
|
|
HRETURN( hr );
|
|
|
|
} //*** CStartupNotify::HrNotifyListeners()
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//++
|
|
//
|
|
// HRESULT
|
|
// CStartupNotify::HrProcessListener
|
|
//
|
|
// Description:
|
|
// This function instantiates a cluster startup listener component
|
|
// and calls the appropriate methods.
|
|
//
|
|
// Arguments:
|
|
// rclsidListenerCLSIDIn
|
|
// CLSID of the startup listener component
|
|
//
|
|
// punkResTypeServicesIn
|
|
// Pointer to the IUnknown interface on the resource type services
|
|
// component. This interface provides methods that help configure
|
|
// resource types.
|
|
//
|
|
// Return Values:
|
|
// S_OK
|
|
// Success.
|
|
//
|
|
// other HRESULTs
|
|
// Something went wrong during the processing of the listener.
|
|
//
|
|
//--
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
HRESULT
|
|
CStartupNotify::HrProcessListener(
|
|
const CLSID & rclsidListenerCLSIDIn
|
|
, IUnknown * punkResTypeServicesIn
|
|
)
|
|
{
|
|
TraceFunc( "" );
|
|
|
|
HRESULT hr = S_OK;
|
|
IClusCfgStartupListener * pcslStartupListener = NULL;
|
|
|
|
TraceMsgGUID( mtfALWAYS, "The CLSID of this startup listener is ", rclsidListenerCLSIDIn );
|
|
|
|
do
|
|
{
|
|
//
|
|
// Create the component represented by the CLSID passed in
|
|
//
|
|
hr = THR(
|
|
CoCreateInstance(
|
|
rclsidListenerCLSIDIn
|
|
, NULL
|
|
, CLSCTX_INPROC_SERVER
|
|
, __uuidof( pcslStartupListener )
|
|
, reinterpret_cast< void ** >( &pcslStartupListener )
|
|
)
|
|
);
|
|
|
|
if ( FAILED( hr ) )
|
|
{
|
|
TraceFlow1( "Error %#x occurred trying to create the cluster startup listener component.", hr );
|
|
LogMsg( "Error %#x occurred trying to create a cluster startup listener component.", hr );
|
|
break;
|
|
} // if: we could not create the cluster startup listener component
|
|
|
|
// Notify this listener.
|
|
hr = THR( pcslStartupListener->Notify( punkResTypeServicesIn ) );
|
|
|
|
if ( FAILED( hr ) )
|
|
{
|
|
TraceFlow1( "Error %#x occurred trying to notify this startup listener.", hr );
|
|
LogMsg( "Error %#x occurred trying to notify a cluster startup listener.", hr );
|
|
break;
|
|
} // if: this notification
|
|
}
|
|
while( false ); // dummy do-while loop to avoid gotos.
|
|
|
|
//
|
|
// Cleanup code
|
|
//
|
|
|
|
if ( pcslStartupListener != NULL )
|
|
{
|
|
pcslStartupListener->Release();
|
|
} // if: we had obtained a pointer to the startup listener interface
|
|
|
|
HRETURN( hr );
|
|
|
|
} //*** CStartupNotify::HrProcessListener()
|
|
|