mirror of
https://github.com/reactos/reactos.git
synced 2024-11-18 21:13:52 +00:00
341 lines
12 KiB
C
341 lines
12 KiB
C
/*++
|
|
|
|
Copyright (C) Microsoft Corporation, 1991 - 1999
|
|
|
|
Module Name:
|
|
|
|
retry.c
|
|
|
|
Abstract:
|
|
|
|
Packet retry routines for CLASSPNP
|
|
|
|
Environment:
|
|
|
|
kernel mode only
|
|
|
|
Notes:
|
|
|
|
|
|
Revision History:
|
|
|
|
--*/
|
|
|
|
#include "classp.h"
|
|
|
|
/*
|
|
* InterpretTransferPacketError
|
|
*
|
|
* Interpret the SRB error into a meaningful IRP status.
|
|
* ClassInterpretSenseInfo also may modify the SRB for the retry.
|
|
*
|
|
* Return TRUE iff packet should be retried.
|
|
*/
|
|
BOOLEAN NTAPI InterpretTransferPacketError(PTRANSFER_PACKET Pkt)
|
|
{
|
|
BOOLEAN shouldRetry = FALSE;
|
|
PCDB pCdb = (PCDB)Pkt->Srb.Cdb;
|
|
|
|
/*
|
|
* Interpret the error using the returned sense info first.
|
|
*/
|
|
Pkt->RetryIntervalSec = 0;
|
|
if (pCdb->MEDIA_REMOVAL.OperationCode == SCSIOP_MEDIUM_REMOVAL){
|
|
/*
|
|
* This is an Ejection Control SRB. Interpret its sense info specially.
|
|
*/
|
|
shouldRetry = ClassInterpretSenseInfo(
|
|
Pkt->Fdo,
|
|
&Pkt->Srb,
|
|
IRP_MJ_SCSI,
|
|
0,
|
|
MAXIMUM_RETRIES - Pkt->NumRetries,
|
|
&Pkt->Irp->IoStatus.Status,
|
|
&Pkt->RetryIntervalSec);
|
|
if (shouldRetry){
|
|
/*
|
|
* If the device is not ready, wait at least 2 seconds before retrying.
|
|
*/
|
|
PSENSE_DATA senseInfoBuffer = Pkt->Srb.SenseInfoBuffer;
|
|
ASSERT(senseInfoBuffer);
|
|
if (((Pkt->Irp->IoStatus.Status == STATUS_DEVICE_NOT_READY) &&
|
|
(senseInfoBuffer->AdditionalSenseCode == SCSI_ADSENSE_LUN_NOT_READY)) ||
|
|
(SRB_STATUS(Pkt->Srb.SrbStatus) == SRB_STATUS_SELECTION_TIMEOUT)){
|
|
|
|
Pkt->RetryIntervalSec = MAX(Pkt->RetryIntervalSec, 2);
|
|
}
|
|
}
|
|
}
|
|
else if ((pCdb->MODE_SENSE.OperationCode == SCSIOP_MODE_SENSE) ||
|
|
(pCdb->MODE_SENSE.OperationCode == SCSIOP_MODE_SENSE10)){
|
|
/*
|
|
* This is an Mode Sense SRB. Interpret its sense info specially.
|
|
*/
|
|
shouldRetry = ClassInterpretSenseInfo(
|
|
Pkt->Fdo,
|
|
&Pkt->Srb,
|
|
IRP_MJ_SCSI,
|
|
0,
|
|
MAXIMUM_RETRIES - Pkt->NumRetries,
|
|
&Pkt->Irp->IoStatus.Status,
|
|
&Pkt->RetryIntervalSec);
|
|
if (shouldRetry){
|
|
/*
|
|
* If the device is not ready, wait at least 2 seconds before retrying.
|
|
*/
|
|
PSENSE_DATA senseInfoBuffer = Pkt->Srb.SenseInfoBuffer;
|
|
ASSERT(senseInfoBuffer);
|
|
if (((Pkt->Irp->IoStatus.Status == STATUS_DEVICE_NOT_READY) &&
|
|
(senseInfoBuffer->AdditionalSenseCode == SCSI_ADSENSE_LUN_NOT_READY)) ||
|
|
(SRB_STATUS(Pkt->Srb.SrbStatus) == SRB_STATUS_SELECTION_TIMEOUT)){
|
|
|
|
Pkt->RetryIntervalSec = MAX(Pkt->RetryIntervalSec, 2);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Some special cases for mode sense.
|
|
*/
|
|
if (Pkt->Irp->IoStatus.Status == STATUS_VERIFY_REQUIRED){
|
|
shouldRetry = TRUE;
|
|
}
|
|
else if (SRB_STATUS(Pkt->Srb.SrbStatus) == SRB_STATUS_DATA_OVERRUN){
|
|
/*
|
|
* This is a HACK.
|
|
* Atapi returns SRB_STATUS_DATA_OVERRUN when it really means
|
|
* underrun (i.e. success, and the buffer is longer than needed).
|
|
* So treat this as a success.
|
|
*/
|
|
Pkt->Irp->IoStatus.Status = STATUS_SUCCESS;
|
|
InterlockedExchangeAdd((PLONG)&Pkt->OriginalIrp->IoStatus.Information, (LONG)Pkt->Srb.DataTransferLength);
|
|
shouldRetry = FALSE;
|
|
}
|
|
}
|
|
else if (pCdb->CDB10.OperationCode == SCSIOP_READ_CAPACITY){
|
|
/*
|
|
* This is a Drive Capacity SRB. Interpret its sense info specially.
|
|
*/
|
|
shouldRetry = ClassInterpretSenseInfo(
|
|
Pkt->Fdo,
|
|
&Pkt->Srb,
|
|
IRP_MJ_SCSI,
|
|
0,
|
|
MAXIMUM_RETRIES - Pkt->NumRetries,
|
|
&Pkt->Irp->IoStatus.Status,
|
|
&Pkt->RetryIntervalSec);
|
|
if (Pkt->Irp->IoStatus.Status == STATUS_VERIFY_REQUIRED){
|
|
shouldRetry = TRUE;
|
|
}
|
|
}
|
|
else if ((pCdb->CDB10.OperationCode == SCSIOP_READ) ||
|
|
(pCdb->CDB10.OperationCode == SCSIOP_WRITE)){
|
|
/*
|
|
* This is a Read/Write Data packet.
|
|
*/
|
|
PIO_STACK_LOCATION origCurrentSp = IoGetCurrentIrpStackLocation(Pkt->OriginalIrp);
|
|
|
|
shouldRetry = ClassInterpretSenseInfo(
|
|
Pkt->Fdo,
|
|
&Pkt->Srb,
|
|
origCurrentSp->MajorFunction,
|
|
0,
|
|
MAXIMUM_RETRIES - Pkt->NumRetries,
|
|
&Pkt->Irp->IoStatus.Status,
|
|
&Pkt->RetryIntervalSec);
|
|
/*
|
|
* Deal with some special cases.
|
|
*/
|
|
if (Pkt->Irp->IoStatus.Status == STATUS_INSUFFICIENT_RESOURCES){
|
|
/*
|
|
* We are in extreme low-memory stress.
|
|
* We will retry in smaller chunks.
|
|
*/
|
|
shouldRetry = TRUE;
|
|
}
|
|
else if (TEST_FLAG(origCurrentSp->Flags, SL_OVERRIDE_VERIFY_VOLUME) &&
|
|
(Pkt->Irp->IoStatus.Status == STATUS_VERIFY_REQUIRED)){
|
|
/*
|
|
* We are still verifying a (possibly) reloaded disk/cdrom.
|
|
* So retry the request.
|
|
*/
|
|
Pkt->Irp->IoStatus.Status = STATUS_IO_DEVICE_ERROR;
|
|
shouldRetry = TRUE;
|
|
}
|
|
}
|
|
else {
|
|
DBGERR(("Unhandled SRB Function %xh in error path for packet %p (did miniport change Srb.Cdb.OperationCode ?)", (ULONG)pCdb->CDB10.OperationCode, Pkt));
|
|
}
|
|
|
|
return shouldRetry;
|
|
}
|
|
|
|
/*
|
|
* RetryTransferPacket
|
|
*
|
|
* Retry sending a TRANSFER_PACKET.
|
|
*
|
|
* Return TRUE iff the packet is complete.
|
|
* (if so the status in pkt->irp is the final status).
|
|
*/
|
|
BOOLEAN NTAPI RetryTransferPacket(PTRANSFER_PACKET Pkt)
|
|
{
|
|
BOOLEAN packetDone;
|
|
|
|
DBGTRACE(ClassDebugTrace, ("retrying failed transfer (pkt=%ph, op=%s)", Pkt, DBGGETSCSIOPSTR(&Pkt->Srb)));
|
|
|
|
ASSERT(Pkt->NumRetries > 0);
|
|
Pkt->NumRetries--;
|
|
|
|
/*
|
|
* Tone down performance on the retry.
|
|
* This increases the chance for success on the retry.
|
|
* We've seen instances of drives that fail consistently but then start working
|
|
* once this scale-down is applied.
|
|
*/
|
|
SET_FLAG(Pkt->Srb.SrbFlags, SRB_FLAGS_DISABLE_DISCONNECT);
|
|
SET_FLAG(Pkt->Srb.SrbFlags, SRB_FLAGS_DISABLE_SYNCH_TRANSFER);
|
|
CLEAR_FLAG(Pkt->Srb.SrbFlags, SRB_FLAGS_QUEUE_ACTION_ENABLE);
|
|
Pkt->Srb.QueueTag = SP_UNTAGGED;
|
|
|
|
if (Pkt->Irp->IoStatus.Status == STATUS_INSUFFICIENT_RESOURCES){
|
|
PCDB pCdb = (PCDB)Pkt->Srb.Cdb;
|
|
BOOLEAN isReadWrite = ((pCdb->CDB10.OperationCode == SCSIOP_READ) ||
|
|
(pCdb->CDB10.OperationCode == SCSIOP_WRITE));
|
|
|
|
if (Pkt->InLowMemRetry || !isReadWrite){
|
|
/*
|
|
* This should never happen.
|
|
* The memory manager guarantees that at least four pages will
|
|
* be available to allow forward progress in the port driver.
|
|
* So a one-page transfer should never fail with insufficient resources.
|
|
*/
|
|
ASSERT(isReadWrite && !Pkt->InLowMemRetry);
|
|
packetDone = TRUE;
|
|
}
|
|
else {
|
|
/*
|
|
* We are in low-memory stress.
|
|
* Start the low-memory retry state machine, which tries to
|
|
* resend the packet in little one-page chunks.
|
|
*/
|
|
InitLowMemRetry( Pkt,
|
|
Pkt->BufPtrCopy,
|
|
Pkt->BufLenCopy,
|
|
Pkt->TargetLocationCopy);
|
|
StepLowMemRetry(Pkt);
|
|
packetDone = FALSE;
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* Retry the packet by simply resending it after a delay.
|
|
* Put the packet back in the pending queue and
|
|
* schedule a timer to retry the transfer.
|
|
*
|
|
* Do not call SetupReadWriteTransferPacket again because:
|
|
* (1) The minidriver may have set some bits
|
|
* in the SRB that it needs again and
|
|
* (2) doing so would reset numRetries.
|
|
*
|
|
* BECAUSE we do not call SetupReadWriteTransferPacket again,
|
|
* we have to reset a couple fields in the SRB that
|
|
* some miniports overwrite when they fail an SRB.
|
|
*/
|
|
|
|
Pkt->Srb.DataBuffer = Pkt->BufPtrCopy;
|
|
Pkt->Srb.DataTransferLength = Pkt->BufLenCopy;
|
|
|
|
if (Pkt->RetryIntervalSec == 0){
|
|
/*
|
|
* Always delay by at least a little when retrying.
|
|
* Some problems (e.g. CRC errors) are not recoverable without a slight delay.
|
|
*/
|
|
LARGE_INTEGER timerPeriod;
|
|
|
|
timerPeriod.HighPart = -1;
|
|
timerPeriod.LowPart = -(LONG)((ULONG)MINIMUM_RETRY_UNITS*KeQueryTimeIncrement());
|
|
KeInitializeTimer(&Pkt->RetryTimer);
|
|
KeInitializeDpc(&Pkt->RetryTimerDPC, TransferPacketRetryTimerDpc, Pkt);
|
|
KeSetTimer(&Pkt->RetryTimer, timerPeriod, &Pkt->RetryTimerDPC);
|
|
}
|
|
else {
|
|
LARGE_INTEGER timerPeriod;
|
|
|
|
ASSERT(Pkt->RetryIntervalSec < 100); // sanity check
|
|
timerPeriod.HighPart = -1;
|
|
timerPeriod.LowPart = Pkt->RetryIntervalSec*-10000000;
|
|
KeInitializeTimer(&Pkt->RetryTimer);
|
|
KeInitializeDpc(&Pkt->RetryTimerDPC, TransferPacketRetryTimerDpc, Pkt);
|
|
KeSetTimer(&Pkt->RetryTimer, timerPeriod, &Pkt->RetryTimerDPC);
|
|
}
|
|
packetDone = FALSE;
|
|
}
|
|
|
|
return packetDone;
|
|
}
|
|
|
|
VOID NTAPI TransferPacketRetryTimerDpc(IN PKDPC Dpc,
|
|
IN PVOID DeferredContext,
|
|
IN PVOID SystemArgument1,
|
|
IN PVOID SystemArgument2)
|
|
{
|
|
PTRANSFER_PACKET pkt = (PTRANSFER_PACKET)DeferredContext;
|
|
SubmitTransferPacket(pkt);
|
|
}
|
|
|
|
VOID NTAPI InitLowMemRetry(PTRANSFER_PACKET Pkt, PVOID BufPtr, ULONG Len, LARGE_INTEGER TargetLocation)
|
|
{
|
|
ASSERT(Len > 0);
|
|
ASSERT(!Pkt->InLowMemRetry);
|
|
Pkt->InLowMemRetry = TRUE;
|
|
Pkt->LowMemRetry_remainingBufPtr = BufPtr;
|
|
Pkt->LowMemRetry_remainingBufLen = Len;
|
|
Pkt->LowMemRetry_nextChunkTargetLocation = TargetLocation;
|
|
}
|
|
|
|
/*
|
|
* StepLowMemRetry
|
|
*
|
|
* During extreme low-memory stress, this function retries
|
|
* a packet in small one-page chunks, sent serially.
|
|
*
|
|
* Returns TRUE iff the packet is done.
|
|
*/
|
|
BOOLEAN NTAPI StepLowMemRetry(PTRANSFER_PACKET Pkt)
|
|
{
|
|
BOOLEAN packetDone;
|
|
|
|
if (Pkt->LowMemRetry_remainingBufLen == 0){
|
|
packetDone = TRUE;
|
|
}
|
|
else {
|
|
ULONG thisChunkLen;
|
|
ULONG bytesToNextPageBoundary;
|
|
|
|
/*
|
|
* Make sure the little chunk we send is <= a page length
|
|
* AND that it does not cross any page boundaries.
|
|
*/
|
|
bytesToNextPageBoundary = PAGE_SIZE-(ULONG)((ULONG_PTR)Pkt->LowMemRetry_remainingBufPtr%PAGE_SIZE);
|
|
thisChunkLen = MIN(Pkt->LowMemRetry_remainingBufLen, bytesToNextPageBoundary);
|
|
|
|
/*
|
|
* Set up the transfer packet for the new little chunk.
|
|
* This will reset numRetries so that we retry each chunk as required.
|
|
*/
|
|
SetupReadWriteTransferPacket(Pkt,
|
|
Pkt->LowMemRetry_remainingBufPtr,
|
|
thisChunkLen,
|
|
Pkt->LowMemRetry_nextChunkTargetLocation,
|
|
Pkt->OriginalIrp);
|
|
|
|
Pkt->LowMemRetry_remainingBufPtr += thisChunkLen;
|
|
Pkt->LowMemRetry_remainingBufLen -= thisChunkLen;
|
|
Pkt->LowMemRetry_nextChunkTargetLocation.QuadPart += thisChunkLen;
|
|
|
|
SubmitTransferPacket(Pkt);
|
|
packetDone = FALSE;
|
|
}
|
|
|
|
return packetDone;
|
|
}
|