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553 lines
11 KiB
553 lines
11 KiB
/*++
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Copyright (c) 1999 Microsoft Corporation
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Module Name:
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wpipm.cxx
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Abstract:
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Contains the WPIPM class that handles communication with
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the admin service. WPIPM responds to pings, and tells
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the process when to shut down.
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Author:
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Michael Courage (MCourage) 22-Feb-1999
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Revision History:
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--*/
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#include <precomp.hxx>
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#include "dbgutil.h"
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#include "wpipm.hxx"
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extern PFN_ULATQ_COLLECT_PERF_COUNTERS g_pfnCollectCounters;
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/**
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*
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* Routine Description:
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*
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* Initializes WPIPM.
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*
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* Arguments:
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*
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* pWpContext - pointer to the wp context (so we can tell it to shutdown)
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*
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* Return Value:
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*
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* HRESULT
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*/
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HRESULT
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WP_IPM::Initialize(
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WP_CONTEXT * pWpContext
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)
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{
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HRESULT hr = S_OK;
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m_pWpContext = pWpContext;
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DWORD dwId = GetCurrentProcessId();
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//
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// create pipe
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//
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hr = IPM_MESSAGE_PIPE::CreateIpmMessagePipe(this,
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pWpContext->QueryConfig()->QueryNamedPipeId(),
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FALSE, // not server side
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NULL, // security descriptor
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&m_pPipe);
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if (FAILED(hr))
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{
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goto exit;
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}
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//
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// Send the real pid over the pipe
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//
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hr = m_pPipe->WriteMessage(IPM_OP_GETPID,
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sizeof(dwId),
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&dwId);
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if (FAILED(hr))
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{
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goto exit;
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}
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hr = S_OK;
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exit:
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if (FAILED(hr))
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{
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Terminate();
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}
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return hr;
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}
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/**
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*
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* Routine Description:
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*
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* Terminates WPIPM.
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*
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* If the message pipe is open this function will disconnect it
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* and wait for the pipe's disconnection callback.
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*
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* Arguments:
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*
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* None.
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*
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* Return Value:
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*
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* HRESULT
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*/
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HRESULT
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WP_IPM::Terminate(
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VOID
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)
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{
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if (m_pPipe)
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{
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m_pPipe->DestroyIpmMessagePipe();
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// pipe deletes itself
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m_pPipe = NULL;
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}
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m_pWpContext = NULL;
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return S_OK;
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}
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/**
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*
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*
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* Routine Description:
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*
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* This is a callback from the message pipe that means
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* the pipe has received a message.
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*
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* We decode the message and respond appropriately.
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*
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* Arguments:
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*
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* pPipeMessage - the message that we received
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*
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* Return Value:
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*
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* HRESULT
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*
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*/
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VOID
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WP_IPM::AcceptMessage(
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IN const IPM_MESSAGE * pPipeMessage
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)
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{
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HRESULT hr = NO_ERROR;
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BOOL fRet = FALSE;
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switch (pPipeMessage->GetOpcode())
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{
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case IPM_OP_PING:
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//
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// Pings must go through the same mechanism that requests go through
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// to verify that requests are being picked off of the completion port
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//
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fRet = ThreadPoolPostCompletion(0, HandlePing, (LPOVERLAPPED)this);
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if (FALSE == fRet)
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{
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hr = HRESULT_FROM_WIN32(GetLastError());
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DBGPRINTF((DBG_CONTEXT, "Posting completion for ping handling failed"));
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break;
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}
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break;
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case IPM_OP_SHUTDOWN:
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hr = HandleShutdown(
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*( reinterpret_cast<const BOOL *>( pPipeMessage->GetData() ) )
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);
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break;
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case IPM_OP_REQUEST_COUNTERS:
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hr = HandleCounterRequest();
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break;
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case IPM_OP_PERIODIC_PROCESS_RESTART_PERIOD_IN_MINUTES:
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DBG_ASSERT( pPipeMessage->GetData() != NULL );
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hr = WP_RECYCLER::StartTimeBased(
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*( reinterpret_cast<const DWORD *>( pPipeMessage->GetData() ) )
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);
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hr = NO_ERROR;
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break;
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case IPM_OP_PERIODIC_PROCESS_RESTART_MEMORY_USAGE_IN_KB:
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{
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DBG_ASSERT( pPipeMessage->GetData() != NULL );
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// there are 2 DWORDS sent with memory based recycling
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// first is Max Virtual Memory, second is Max Private Bytes
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DWORD dwMaxVirtualMemoryKbUsage =
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*( reinterpret_cast<const DWORD *>( pPipeMessage->GetData() ) );
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DWORD dwMaxPrivateBytesKbUsage =
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*( reinterpret_cast<const DWORD *>( pPipeMessage->GetData() ) + 1 );
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hr = WP_RECYCLER::StartMemoryBased(
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dwMaxVirtualMemoryKbUsage,
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dwMaxPrivateBytesKbUsage );
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hr = NO_ERROR;
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break;
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}
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case IPM_OP_PERIODIC_PROCESS_RESTART_SCHEDULE:
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DBG_ASSERT( pPipeMessage->GetData() != NULL );
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hr = WP_RECYCLER::StartScheduleBased(
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( reinterpret_cast<const WCHAR *>( pPipeMessage->GetData() ) )
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);
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hr = NO_ERROR;
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break;
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default:
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DBG_ASSERT(FALSE);
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hr = E_FAIL;
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break;
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}
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return;
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}
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/**
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*
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* Routine Description:
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*
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* This is a callback from the message pipe that means
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* the pipe has been connected and is ready for use.
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*
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* Arguments:
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*
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* None.
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*
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* Return Value:
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*
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* VOID
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*/
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VOID
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WP_IPM::PipeConnected(
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VOID
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)
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{
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return;
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}
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/**
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*
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* Routine Description:
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*
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* This is a callback from the message pipe that means
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* the pipe has been disconnected and you won't be receiving
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* any more messages.
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*
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* Tells WPIPM::Terminate that it's ok to exit now.
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*
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* Arguments:
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*
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* hr - the error code associated with the pipe disconnection
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*
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* Return Value:
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*
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* VOID
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*/
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VOID
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WP_IPM::PipeDisconnected(
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IN HRESULT hr
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)
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{
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if (FAILED(hr))
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{
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IF_DEBUG( WPIPM )
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{
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DBGPRINTF(( DBG_CONTEXT, "FSDF" ));
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}
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}
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//
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// If the pipe disappears out from under us, WAS has probably orphaned
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// us, initiate fast shutdown of this worker process.
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//
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if (!m_pWpContext->IsInShutdown() &&
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hr != HRESULT_FROM_WIN32(ERROR_OPERATION_ABORTED) &&
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IsDebuggerPresent())
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{
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DBG_ASSERT( !"w3wp.exe is getting orphaned" );
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}
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m_pWpContext->IndicateShutdown( TRUE );
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return;
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}
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/**
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*
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* Routine Description:
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*
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* This is a callback from the message pipe that means
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* that the pipe received an invalid message.
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* Therefore, we signal to shutdown.
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*
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* Arguments:
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*
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* VOID
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*
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* Return Value:
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*
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* VOID
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*/
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VOID
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WP_IPM::PipeMessageInvalid(
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VOID
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)
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{
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return PipeDisconnected(HRESULT_FROM_WIN32(ERROR_INVALID_DATA));
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}
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/**
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*
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* Routine Description:
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*
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* Handles the ping message. Sends the ping response message.
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*
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* Arguments:
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*
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* None.
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*
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* Return Value:
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*
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* HRESULT
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*/
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//static
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VOID
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WP_IPM::HandlePing(
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DWORD,
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DWORD dwNumberOfBytesTransferred,
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LPOVERLAPPED lpOverlapped
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)
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{
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if (0 != dwNumberOfBytesTransferred)
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{
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DBG_ASSERT(0 == dwNumberOfBytesTransferred);
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return;
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}
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DBG_ASSERT(NULL != lpOverlapped);
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WP_IPM * pThis = (WP_IPM*) lpOverlapped;
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DBG_ASSERT(pThis->m_pPipe);
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HRESULT hr = NO_ERROR;
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IF_DEBUG( WPIPM )
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{
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DBGPRINTF((DBG_CONTEXT, "Handle Ping\n\n"));
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}
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hr = pThis->m_pPipe->WriteMessage(
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IPM_OP_PING_REPLY, // ping reply opcode
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0, // no data to send
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NULL // pointer to no data
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);
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if ( FAILED ( hr ) )
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{
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IF_DEBUG( WPIPM )
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{
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DBGPRINTF((DBG_CONTEXT, "Failed to respond to ping\n\n"));
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}
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goto exit;
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}
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//
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// if we are not healthy then we need to to ask WAS to
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// shut us down.
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//
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if ( !( g_pwpContext->GetUnhealthy()))
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{
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IF_DEBUG( WPIPM )
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{
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DBGPRINTF((DBG_CONTEXT, "Requesting shutdown due to isapi reporting unhealthiness\n\n"));
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}
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hr = pThis->SendMsgToAdminProcess( IPM_WP_RESTART_ISAPI_REQUESTED_RECYCLE );
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if ( FAILED ( hr ) )
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{
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IF_DEBUG( WPIPM )
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{
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DBGPRINTF((DBG_CONTEXT, "Failed telling WAS to shut us down\n\n"));
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}
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goto exit;
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}
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}
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exit:
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return;
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}
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/**
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*
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* Routine Description:
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*
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* Handles the counter request message.
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*
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* Arguments:
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*
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* None.
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*
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* Return Value:
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*
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* HRESULT
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*/
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HRESULT
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WP_IPM::HandleCounterRequest(
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VOID
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)
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{
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IF_DEBUG( WPIPM )
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{
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DBGPRINTF((DBG_CONTEXT, "Handle Counter Request\n\n"));
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}
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HRESULT hr;
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PBYTE pCounterData;
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DWORD dwCounterData;
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DBG_ASSERT ( m_pPipe );
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if (FAILED(hr = g_pfnCollectCounters(&pCounterData, &dwCounterData)))
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{
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return hr;
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}
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return m_pPipe->WriteMessage(IPM_OP_SEND_COUNTERS, // ping reply opcode
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dwCounterData, // no data to send
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pCounterData); // pointer to no data
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}
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/**
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*
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* Routine Description:
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*
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*
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* Handles the shutdown message. Shuts down the process
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*
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* Arguments:
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*
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* None.
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*
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* Return Value:
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*
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* HRESULT
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*/
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HRESULT
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WP_IPM::HandleShutdown(
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BOOL fDoImmediate
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)
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{
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HRESULT hr = S_OK;
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IF_DEBUG( WPIPM )
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{
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DBGPRINTF((DBG_CONTEXT, "Handle ******************** Shutdown\n\n"));
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}
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m_pWpContext->IndicateShutdown( fDoImmediate );
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return hr;
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}
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/**
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*
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* Routine Description:
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*
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* Sends the message to indicate the worker process has either finished
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* initializing or has failed to initialize.
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*
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* Arguments:
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*
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* HRESULT indicating success/failure of initialization
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*
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* Return Value:
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*
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* HRESULT
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*/
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HRESULT
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WP_IPM::SendInitCompleteMessage(
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HRESULT hrToSend
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)
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{
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if ( m_pPipe )
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{
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return m_pPipe->WriteMessage(
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IPM_OP_HRESULT, // opcode
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sizeof( hrToSend ), // data length
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reinterpret_cast<BYTE*>( &hrToSend ) // pointer to data
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);
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}
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// if the pipe did not exist then we started up
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// without the IPM, probably we are attempting
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// to run without WAS support. ( from the cmd line )
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return S_OK;
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}
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/**
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*
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* Routine Description:
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*
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* Sends the message to indicate the worker process has reach certain state.
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* Main use is in shutdown. See IPM_WP_SHUTDOWN_MSG for reasons.
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*
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* Arguments:
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*
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* None.
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*
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* Return Value:
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*
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* HRESULT
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*/
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HRESULT
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WP_IPM::SendMsgToAdminProcess(
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IPM_WP_SHUTDOWN_MSG reason
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)
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{
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if (m_pPipe)
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{
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return m_pPipe->WriteMessage(
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IPM_OP_WORKER_REQUESTS_SHUTDOWN, // sends message indicate shutdown
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sizeof(reason), // no data to send
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(BYTE *)&reason // pointer to no data
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);
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}
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return S_OK;
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}
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