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/*++
Copyright (c) 1989 Microsoft Corporation
Module Name:
afddata.c
Abstract:
This module contains global data for AFD.
Author:
David Treadwell (davidtr) 21-Feb-1992
Revision History:
--*/
#include "afdp.h"
#ifdef ALLOC_PRAGMA
#pragma alloc_text( INIT, AfdInitializeData )
#endif
PDEVICE_OBJECT AfdDeviceObject;
KSPIN_LOCK AfdSpinLock;
PERESOURCE AfdResource;
LIST_ENTRY AfdEndpointListHead;
LIST_ENTRY AfdDisconnectListHead;
LIST_ENTRY AfdPollListHead;
LIST_ENTRY AfdTransportInfoListHead;
LIST_ENTRY AfdConstrainedEndpointListHead;
PKPROCESS AfdSystemProcess;
//
// Global lookaside lists. These must always be in nonpaged pool,
// even when the driver is paged out.
//
PAFD_LOOKASIDE_LISTS AfdLookasideLists;
//
// Globals for dealing with AFD's executive worker thread.
//
KSPIN_LOCK AfdWorkQueueSpinLock;
LIST_ENTRY AfdWorkQueueListHead;
BOOLEAN AfdWorkThreadRunning = FALSE;
WORK_QUEUE_ITEM AfdWorkQueueItem;
//
// Globals to track the buffers used by AFD.
//
ULONG AfdLargeBufferListDepth;
ULONG AfdMediumBufferListDepth;
ULONG AfdSmallBufferListDepth;
CLONG AfdLargeBufferSize; // default == AfdBufferLengthForOnePage
CLONG AfdMediumBufferSize = AFD_DEFAULT_MEDIUM_BUFFER_SIZE;
CLONG AfdSmallBufferSize = AFD_DEFAULT_SMALL_BUFFER_SIZE;
ULONG AfdCacheLineSize;
CLONG AfdBufferLengthForOnePage;
//
// Globals for tuning TransmitFile().
//
LIST_ENTRY AfdQueuedTransmitFileListHead;
ULONG AfdActiveTransmitFileCount;
ULONG AfdMaxActiveTransmitFileCount;
//
// Various pieces of configuration information, with default values.
//
CLONG AfdStandardAddressLength = AFD_DEFAULT_STD_ADDRESS_LENGTH;
CCHAR AfdIrpStackSize = AFD_DEFAULT_IRP_STACK_SIZE;
CCHAR AfdPriorityBoost = AFD_DEFAULT_PRIORITY_BOOST;
ULONG AfdFastSendDatagramThreshold = AFD_FAST_SEND_DATAGRAM_THRESHOLD;
CLONG AfdReceiveWindowSize;
CLONG AfdSendWindowSize;
CLONG AfdBufferMultiplier = AFD_DEFAULT_BUFFER_MULTIPLIER;
CLONG AfdTransmitIoLength;
CLONG AfdMaxFastTransmit = AFD_DEFAULT_MAX_FAST_TRANSMIT;
CLONG AfdMaxFastCopyTransmit = AFD_DEFAULT_MAX_FAST_COPY_TRANSMIT;
ULONG AfdEndpointsOpened = 0;
ULONG AfdEndpointsCleanedUp = 0;
ULONG AfdEndpointsClosed = 0;
BOOLEAN AfdIgnorePushBitOnReceives = FALSE;
BOOLEAN AfdEnableDynamicBacklog = AFD_DEFAULT_ENABLE_DYNAMIC_BACKLOG;
LONG AfdMinimumDynamicBacklog = AFD_DEFAULT_MINIMUM_DYNAMIC_BACKLOG;
LONG AfdMaximumDynamicBacklog = AFD_DEFAULT_MAXIMUM_DYNAMIC_BACKLOG;
LONG AfdDynamicBacklogGrowthDelta = AFD_DEFAULT_DYNAMIC_BACKLOG_GROWTH_DELTA;
BOOLEAN AfdDisableRawSecurity = FALSE;
//
// Global which holds AFD's discardable code handle, and a BOOLEAN
// that tells whether AFD is loaded.
//
PVOID AfdDiscardableCodeHandle;
BOOLEAN AfdLoaded = FALSE;
FAST_IO_DISPATCH AfdFastIoDispatch =
{
11, // SizeOfFastIoDispatch
NULL, // FastIoCheckIfPossible
AfdFastIoRead, // FastIoRead
AfdFastIoWrite, // FastIoWrite
NULL, // FastIoQueryBasicInfo
NULL, // FastIoQueryStandardInfo
NULL, // FastIoLock
NULL, // FastIoUnlockSingle
NULL, // FastIoUnlockAll
NULL, // FastIoUnlockAllByKey
AfdFastIoDeviceControl // FastIoDeviceControl
};
#if DBG
ULONG AfdDebug = 0;
ULONG AfdLocksAcquired = 0;
BOOLEAN AfdUsePrivateAssert = FALSE;
#endif
//
// Some counters used for monitoring performance. These are not enabled
// in the normal build.
//
#if AFD_PERF_DBG
CLONG AfdFullReceiveIndications = 0;
CLONG AfdPartialReceiveIndications = 0;
CLONG AfdFullReceiveDatagramIndications = 0;
CLONG AfdPartialReceiveDatagramIndications = 0;
CLONG AfdFastPollsSucceeded = 0;
CLONG AfdFastPollsFailed = 0;
CLONG AfdFastSendsSucceeded = 0;
CLONG AfdFastSendsFailed = 0;
CLONG AfdFastReceivesSucceeded = 0;
CLONG AfdFastReceivesFailed = 0;
CLONG AfdFastSendDatagramsSucceeded = 0;
CLONG AfdFastSendDatagramsFailed = 0;
CLONG AfdFastReceiveDatagramsSucceeded = 0;
CLONG AfdFastReceiveDatagramsFailed = 0;
BOOLEAN AfdDisableFastIo = FALSE;
BOOLEAN AfdDisableConnectionReuse = FALSE;
#endif // AFD_PERF_DBG
#if AFD_KEEP_STATS
AFD_QUOTA_STATS AfdQuotaStats;
AFD_HANDLE_STATS AfdHandleStats;
AFD_QUEUE_STATS AfdQueueStats;
AFD_CONNECTION_STATS AfdConnectionStats;
#endif // AFD_KEEP_STATS
#if ENABLE_ABORT_TIMER_HACK
LARGE_INTEGER AfdAbortTimerTimeout;
#endif // ENABLE_ABORT_TIMER_HACK
QOS AfdDefaultQos =
{
{ // SendingFlowspec
-1, // TokenRate
-1, // TokenBucketSize
-1, // PeakBandwidth
-1, // Latency
-1, // DelayVariation
BestEffortService, // LevelOfGuarantee
0, // CostOfCall
1 // NetworkAvailability
},
{ // ReceivingFlowspec
-1, // TokenRate
-1, // TokenBucketSize
-1, // PeakBandwidth
-1, // Latency
-1, // DelayVariation
BestEffortService, // LevelOfGuarantee
0, // CostOfCall
1 // NetworkAvailability
},
{ // ProviderSpecific
0, // len
NULL // buf
}
};
BOOLEAN
AfdInitializeData (
VOID
)
{
PAGED_CODE( );
#if DBG || REFERENCE_DEBUG
AfdInitializeDebugData( );
#endif
//
// Initialize global spin locks and resources used by AFD.
//
KeInitializeSpinLock( &AfdSpinLock );
KeInitializeSpinLock( &AfdWorkQueueSpinLock );
AfdResource = AFD_ALLOCATE_POOL(
NonPagedPool,
sizeof(*AfdResource),
AFD_RESOURCE_POOL_TAG
);
if ( AfdResource == NULL ) {
return FALSE;
}
ExInitializeResource( AfdResource );
//
// Initialize global lists.
//
InitializeListHead( &AfdEndpointListHead );
InitializeListHead( &AfdDisconnectListHead );
InitializeListHead( &AfdPollListHead );
InitializeListHead( &AfdTransportInfoListHead );
InitializeListHead( &AfdWorkQueueListHead );
InitializeListHead( &AfdConstrainedEndpointListHead );
InitializeListHead( &AfdQueuedTransmitFileListHead );
AfdCacheLineSize= HalGetDmaAlignmentRequirement( );
AfdBufferLengthForOnePage = PAGE_SIZE - AfdCalculateBufferSize( 4, 0 );
AfdLargeBufferSize = AfdBufferLengthForOnePage;
#if ENABLE_ABORT_TIMER_HACK
//
// Initialize the abort timer timeout value.
//
AfdAbortTimerTimeout = RtlEnlargedIntegerMultiply(
AFD_ABORT_TIMER_TIMEOUT_VALUE,
-10*1000*1000
);
#endif // ENABLE_ABORT_TIMER_HACK
//
// Set up buffer counts based on machine size. For smaller
// machines, it is OK to take the perf hit of the additional
// allocations in order to save the nonpaged pool overhead.
//
switch ( MmQuerySystemSize( ) ) {
case MmSmallSystem:
AfdReceiveWindowSize = AFD_SM_DEFAULT_RECEIVE_WINDOW;
AfdSendWindowSize = AFD_SM_DEFAULT_SEND_WINDOW;
AfdTransmitIoLength = AFD_SM_DEFAULT_TRANSMIT_IO_LENGTH;
AfdLargeBufferListDepth = AFD_SM_DEFAULT_LARGE_LIST_DEPTH;
AfdMediumBufferListDepth = AFD_SM_DEFAULT_MEDIUM_LIST_DEPTH;
AfdSmallBufferListDepth = AFD_SM_DEFAULT_SMALL_LIST_DEPTH;
break;
case MmMediumSystem:
AfdReceiveWindowSize = AFD_MM_DEFAULT_RECEIVE_WINDOW;
AfdSendWindowSize = AFD_MM_DEFAULT_SEND_WINDOW;
AfdTransmitIoLength = AFD_MM_DEFAULT_TRANSMIT_IO_LENGTH;
AfdLargeBufferListDepth = AFD_MM_DEFAULT_LARGE_LIST_DEPTH;
AfdMediumBufferListDepth = AFD_MM_DEFAULT_MEDIUM_LIST_DEPTH;
AfdSmallBufferListDepth = AFD_MM_DEFAULT_SMALL_LIST_DEPTH;
break;
case MmLargeSystem:
AfdReceiveWindowSize = AFD_LM_DEFAULT_RECEIVE_WINDOW;
AfdSendWindowSize = AFD_LM_DEFAULT_SEND_WINDOW;
AfdTransmitIoLength = AFD_LM_DEFAULT_TRANSMIT_IO_LENGTH;
AfdLargeBufferListDepth = AFD_LM_DEFAULT_LARGE_LIST_DEPTH;
AfdMediumBufferListDepth = AFD_LM_DEFAULT_MEDIUM_LIST_DEPTH;
AfdSmallBufferListDepth = AFD_LM_DEFAULT_SMALL_LIST_DEPTH;
break;
default:
ASSERT( FALSE );
}
if( MmIsThisAnNtAsSystem() ) {
//
// On the NT Server product, there is no maximum active TransmitFile
// count. Setting this counter to zero short-circuits a number of
// tests for queueing TransmitFile IRPs.
//
AfdMaxActiveTransmitFileCount = 0;
} else {
//
// On the workstation product, the TransmitFile default I/O length
// is always a page size. This conserves memory on workstatioons
// and keeps the server product's performance high.
//
AfdTransmitIoLength = PAGE_SIZE;
//
// Enforce a maximum active TransmitFile count.
//
AfdMaxActiveTransmitFileCount =
AFD_DEFAULT_MAX_ACTIVE_TRANSMIT_FILE_COUNT;
}
return TRUE;
} // AfdInitializeData
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