mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1009 lines
27 KiB
1009 lines
27 KiB
/*++
|
|
|
|
Copyright (c) 1989 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
ResrcSup.c
|
|
|
|
Abstract:
|
|
|
|
This module implements the Rx Resource acquisition routines
|
|
|
|
Author:
|
|
|
|
Joe Linn [JoeLi] 22-Mar-1995
|
|
|
|
Revision History:
|
|
|
|
Balan Sethu Raman [SethuR] 7-June-95
|
|
|
|
Modified return value of resource acquistion routines to RXSTATUS to incorporate
|
|
aborts of cancelled requests.
|
|
|
|
Balan Sethu Raman [SethuR] 8-Nov-95
|
|
|
|
Unified FCB resource acquistion routines and incorporated the two step process
|
|
for handling change buffering state requests in progress.
|
|
|
|
--*/
|
|
|
|
#include "precomp.h"
|
|
#pragma hdrstop
|
|
|
|
//
|
|
// no special bug check id for this module
|
|
|
|
#define BugCheckFileId (0)
|
|
|
|
//
|
|
// The local debug trace level
|
|
//
|
|
|
|
#define Dbg (DEBUG_TRACE_RESRCSUP)
|
|
|
|
#ifdef RDBSS_TRACKER
|
|
#define TRACKER_Doit(XXX__) XXX__
|
|
#define TRACKER_ONLY_DECL(XXX__) XXX__
|
|
|
|
VOID RxTrackerUpdateHistory(
|
|
PRX_CONTEXT pRxContext,
|
|
IN OUT PMRX_FCB MrxFcb,
|
|
ULONG Operation
|
|
RX_FCBTRACKER_PARAMS
|
|
)
|
|
{
|
|
PFCB pFcb = (PFCB)MrxFcb;
|
|
ULONG i;
|
|
RX_FCBTRACKER_CASES TrackerType;
|
|
|
|
//boy this is some great code!
|
|
if (pRxContext == NULL) {
|
|
TrackerType = (RX_FCBTRACKER_CASE_NULLCONTEXT);
|
|
} else if (pRxContext == CHANGE_BUFFERING_STATE_CONTEXT) {
|
|
TrackerType = (RX_FCBTRACKER_CASE_CBS_CONTEXT);
|
|
} else if (pRxContext == CHANGE_BUFFERING_STATE_CONTEXT_WAIT) {
|
|
TrackerType = (RX_FCBTRACKER_CASE_CBS_WAIT_CONTEXT);
|
|
} else {
|
|
ASSERT(NodeType(pRxContext) == RDBSS_NTC_RX_CONTEXT);
|
|
TrackerType = (RX_FCBTRACKER_CASE_NORMAL);
|
|
}
|
|
|
|
if (pFcb!=NULL) {
|
|
ASSERT(NodeTypeIsFcb(pFcb));
|
|
if (Operation == 'aaaa') {
|
|
pFcb->FcbAcquires[TrackerType]++;
|
|
} else {
|
|
pFcb->FcbReleases[TrackerType]++;
|
|
}
|
|
}
|
|
|
|
if (TrackerType != RX_FCBTRACKER_CASE_NORMAL) {
|
|
return;
|
|
}
|
|
|
|
if (Operation == 'aaaa') {
|
|
InterlockedIncrement(&pRxContext->AcquireReleaseFcbTrackerX);
|
|
} else {
|
|
InterlockedDecrement(&pRxContext->AcquireReleaseFcbTrackerX);
|
|
}
|
|
|
|
i = InterlockedIncrement(&pRxContext->TrackerHistoryPointer) - 1;
|
|
if (i < RDBSS_TRACKER_HISTORY_SIZE) {
|
|
pRxContext->TrackerHistory[i].AcquireRelease = Operation;
|
|
pRxContext->TrackerHistory[i].LineNumber = (USHORT)LineNumber;
|
|
pRxContext->TrackerHistory[i].FileName = FileName;
|
|
pRxContext->TrackerHistory[i].SavedTrackerValue = (USHORT)(pRxContext->AcquireReleaseFcbTrackerX);
|
|
pRxContext->TrackerHistory[i].Flags = (ULONG)(pRxContext->Flags);
|
|
}
|
|
|
|
ASSERT(pRxContext->AcquireReleaseFcbTrackerX>=0);
|
|
|
|
}
|
|
#else
|
|
|
|
#define TRACKER_Doit(XXX__)
|
|
#define TRACKER_ONLY_DECL(XXX__)
|
|
|
|
#endif
|
|
|
|
|
|
#ifdef ALLOC_PRAGMA
|
|
#pragma alloc_text(PAGE, RxAcquireExclusiveFcbResourceInMRx)
|
|
#pragma alloc_text(PAGE, RxAcquireSharedFcbResourceInMRx)
|
|
#pragma alloc_text(PAGE, RxReleaseFcbResourceInMRx)
|
|
#pragma alloc_text(PAGE, __RxAcquireFcb)
|
|
#pragma alloc_text(PAGE, RxAcquireFcbForLazyWrite)
|
|
#pragma alloc_text(PAGE, RxAcquireFcbForReadAhead)
|
|
#pragma alloc_text(PAGE, RxNoOpAcquire)
|
|
#pragma alloc_text(PAGE, RxNoOpRelease)
|
|
#pragma alloc_text(PAGE, RxReleaseFcbFromLazyWrite)
|
|
#pragma alloc_text(PAGE, RxReleaseFcbFromReadAhead)
|
|
#pragma alloc_text(PAGE, RxVerifyOperationIsLegal)
|
|
#pragma alloc_text(PAGE, RxAcquireFileForNtCreateSection)
|
|
#pragma alloc_text(PAGE, RxReleaseFileForNtCreateSection)
|
|
#endif
|
|
|
|
NTSTATUS
|
|
RxAcquireExclusiveFcbResourceInMRx(
|
|
PMRX_FCB pFcb)
|
|
{
|
|
return RxAcquireExclusiveFcb(NULL,pFcb);
|
|
}
|
|
|
|
NTSTATUS
|
|
RxAcquireSharedFcbResourceInMRx(
|
|
PMRX_FCB pFcb)
|
|
{
|
|
return RxAcquireSharedFcb(NULL,pFcb);
|
|
}
|
|
|
|
VOID
|
|
RxReleaseFcbResourceInMRx(
|
|
PMRX_FCB pFcb)
|
|
{
|
|
RxReleaseFcb(NULL,pFcb);
|
|
}
|
|
|
|
NTSTATUS
|
|
__RxAcquireFcb(
|
|
IN OUT PMRX_FCB MrxFcb,
|
|
IN PRX_CONTEXT pRxContext,
|
|
IN ULONG Mode
|
|
RX_FCBTRACKER_PARAMS
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine acquires the Fcb in the specified mode and ensures that the desired
|
|
operation is legal. If it is not legal the resource is released and the
|
|
appropriate error code is returned.
|
|
|
|
Arguments:
|
|
|
|
pFcb - the FCB
|
|
|
|
RxContext - supplies the context of the operation for special treatement
|
|
particularly of async, noncached writes. if NULL, you don't do
|
|
the special treatment.
|
|
|
|
Mode - the mode in which the FCB is to be acquired.
|
|
|
|
Return Value:
|
|
|
|
STATUS_SUCCESS -- the Fcb was acquired
|
|
STATUS_LOCK_NOT_GRANTED -- the resource was not acquired
|
|
STATUS_CANCELLED -- the associated RxContext was cancelled.
|
|
|
|
Notes:
|
|
|
|
There are three kinds of resource acquistion patterns folded into this routine.
|
|
These are all dependent upon the context passed in.
|
|
|
|
1) When the context parameter is NULL the resource acquistion routines wait for the
|
|
the FCB resource to be free, i.e., this routine does not return control till the
|
|
resource has been accquired.
|
|
|
|
2) When the context is CHANGE_BUFFERING_STATE_CONTEXT the resource acquistion routines
|
|
do not wait for the resource to become free. The control is returned if the resource is not
|
|
available immmediately.
|
|
|
|
2) When the context is CHANGE_BUFFERING_STATE_CONTEXT_WAIT the resource acquistion routines
|
|
wait for the resource to become free but bypass the wait for the buffering state change
|
|
|
|
3) When the context parameter represents a valid context the behaviour is dictated
|
|
by the flags associated with the context. If the context was cancelled while
|
|
waiting the control is returned immediately with the appropriate erroc code
|
|
(STATUS_CANCELLED). If not the waiting behaviour is dictated by the wait flag in
|
|
the context.
|
|
|
|
--*/
|
|
{
|
|
PFCB pFcb = (PFCB)MrxFcb;
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
|
|
BOOLEAN ResourceAcquired;
|
|
BOOLEAN UncachedAsyncWrite;
|
|
BOOLEAN Wait;
|
|
BOOLEAN fValidContext = FALSE;
|
|
BOOLEAN fRecursiveAcquire;
|
|
BOOLEAN fChangeBufferingStateContext;
|
|
|
|
|
|
PAGED_CODE();
|
|
|
|
fChangeBufferingStateContext = (pRxContext == CHANGE_BUFFERING_STATE_CONTEXT) ||
|
|
(pRxContext == CHANGE_BUFFERING_STATE_CONTEXT_WAIT);
|
|
|
|
fRecursiveAcquire = RxIsFcbAcquiredExclusive(pFcb) || (RxIsFcbAcquiredShared(pFcb) > 0);
|
|
|
|
if (!fRecursiveAcquire &&
|
|
!fChangeBufferingStateContext) {
|
|
// Ensure that no change buffering requests are currently being processed
|
|
if (FlagOn(pFcb->FcbState,FCB_STATE_BUFFERING_STATE_CHANGE_PENDING)) {
|
|
BOOLEAN WaitForChangeBufferingStateProcessing;
|
|
|
|
// A buffering change state request is pending which gets priority
|
|
// over all other FCB resource acquistion requests. Hold this request
|
|
// till the buffering state change request has been completed.
|
|
|
|
RxAcquireSerializationMutex();
|
|
|
|
WaitForChangeBufferingStateProcessing =
|
|
BooleanFlagOn(pFcb->FcbState,FCB_STATE_BUFFERING_STATE_CHANGE_PENDING);
|
|
|
|
RxReleaseSerializationMutex();
|
|
|
|
if (WaitForChangeBufferingStateProcessing) {
|
|
RxLog(("_RxAcquireFcb CBS wait %lx\n",pFcb));
|
|
RxWmiLog(LOG,
|
|
RxAcquireFcb_1,
|
|
LOGPTR(pFcb));
|
|
|
|
ASSERT(pFcb->pBufferingStateChangeCompletedEvent != NULL);
|
|
KeWaitForSingleObject(pFcb->pBufferingStateChangeCompletedEvent,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
(PLARGE_INTEGER) NULL );
|
|
RxLog(("_RxAcquireFcb CBS wait over %lx\n",pFcb));
|
|
RxWmiLog(LOG,
|
|
RxAcquireFcb_2,
|
|
LOGPTR(pFcb));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Set up the parameters for acquiring the resource.
|
|
if (fChangeBufferingStateContext) {
|
|
// An acquisition operation initiated for changing the buffering state will
|
|
// not wait.
|
|
Wait = (pRxContext == CHANGE_BUFFERING_STATE_CONTEXT_WAIT);
|
|
UncachedAsyncWrite = FALSE;
|
|
} else if (pRxContext == NULL) {
|
|
Wait = TRUE;
|
|
UncachedAsyncWrite = FALSE;
|
|
} else {
|
|
fValidContext = TRUE;
|
|
|
|
Wait = BooleanFlagOn(pRxContext->Flags, RX_CONTEXT_FLAG_WAIT);
|
|
|
|
UncachedAsyncWrite = (pRxContext->MajorFunction == IRP_MJ_WRITE) &&
|
|
BooleanFlagOn(pRxContext->Flags, RX_CONTEXT_FLAG_ASYNC_OPERATION) &&
|
|
(FlagOn(pRxContext->CurrentIrp->Flags,IRP_NOCACHE) ||
|
|
!RxWriteCacheingAllowed(pFcb,((PFOBX)(pRxContext->pFobx))->SrvOpen));
|
|
|
|
Status = (BooleanFlagOn(pRxContext->Flags, RX_CONTEXT_FLAG_CANCELLED))
|
|
? STATUS_CANCELLED
|
|
: STATUS_SUCCESS;
|
|
}
|
|
|
|
if (Status == STATUS_SUCCESS) {
|
|
do {
|
|
Status = STATUS_LOCK_NOT_GRANTED;
|
|
|
|
switch (Mode) {
|
|
case FCB_MODE_EXCLUSIVE:
|
|
ResourceAcquired = ExAcquireResourceExclusiveLite(pFcb->Header.Resource, Wait);
|
|
break;
|
|
case FCB_MODE_SHARED:
|
|
ResourceAcquired = ExAcquireResourceSharedLite(pFcb->Header.Resource, Wait);
|
|
break;
|
|
case FCB_MODE_SHARED_WAIT_FOR_EXCLUSIVE:
|
|
ResourceAcquired = ExAcquireSharedWaitForExclusive(pFcb->Header.Resource, Wait);
|
|
break;
|
|
case FCB_MODE_SHARED_STARVE_EXCLUSIVE:
|
|
ResourceAcquired = ExAcquireSharedStarveExclusive(pFcb->Header.Resource, Wait);
|
|
break;
|
|
default:
|
|
ASSERT(!"Valid Mode for acquiring FCB resource");
|
|
ResourceAcquired = FALSE;
|
|
break;
|
|
}
|
|
|
|
if (ResourceAcquired) {
|
|
Status = STATUS_SUCCESS;
|
|
|
|
// If the resource was acquired and it is an async. uncached write operation
|
|
// if the number of outstanding writes operations are greater than zero and there
|
|
// are outstanding waiters,
|
|
|
|
ASSERT_CORRECT_FCB_STRUCTURE(pFcb);
|
|
|
|
if ((pFcb->NonPaged->OutstandingAsyncWrites != 0) &&
|
|
(!UncachedAsyncWrite ||
|
|
(pFcb->Header.Resource->NumberOfSharedWaiters != 0) ||
|
|
(pFcb->Header.Resource->NumberOfExclusiveWaiters != 0)) ) {
|
|
|
|
KeWaitForSingleObject( pFcb->NonPaged->OutstandingAsyncEvent,
|
|
Executive,
|
|
KernelMode,
|
|
FALSE,
|
|
(PLARGE_INTEGER) NULL );
|
|
|
|
ASSERT_CORRECT_FCB_STRUCTURE(pFcb);
|
|
|
|
RxReleaseFcb( NULL, pFcb ); //this is not a contextful release;
|
|
#ifdef RDBSS_TRACKER
|
|
//in fact, this doesn't count as a release at all; dec the count
|
|
pFcb->FcbReleases[RX_FCBTRACKER_CASE_NULLCONTEXT]--;
|
|
#endif
|
|
ResourceAcquired = FALSE;
|
|
|
|
if (fValidContext) {
|
|
ASSERT((NodeType(pRxContext) == RDBSS_NTC_RX_CONTEXT));
|
|
// if the context is still valid, i.e., it has not been cancelled
|
|
Status = (BooleanFlagOn(pRxContext->Flags, RX_CONTEXT_FLAG_CANCELLED))
|
|
? STATUS_CANCELLED
|
|
: STATUS_SUCCESS;
|
|
}
|
|
}
|
|
}
|
|
} while (!ResourceAcquired && (Status == STATUS_SUCCESS));
|
|
|
|
if (ResourceAcquired &&
|
|
fValidContext &&
|
|
!FlagOn(pRxContext->Flags,RX_CONTEXT_FLAG_BYPASS_VALIDOP_CHECK)) {
|
|
|
|
try {
|
|
|
|
RxVerifyOperationIsLegal( pRxContext );
|
|
|
|
} finally {
|
|
if ( AbnormalTermination() ) {
|
|
ExReleaseResourceLite(pFcb->Header.Resource);
|
|
Status = STATUS_LOCK_NOT_GRANTED;
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
if (Status == STATUS_SUCCESS) {
|
|
RxTrackerUpdateHistory(pRxContext,MrxFcb,'aaaa',LineNumber,FileName,SerialNumber);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
VOID
|
|
__RxReleaseFcb(
|
|
IN PRX_CONTEXT pRxContext,
|
|
IN OUT PMRX_FCB MrxFcb
|
|
RX_FCBTRACKER_PARAMS
|
|
)
|
|
{
|
|
PFCB pFcb = (PFCB)MrxFcb;
|
|
BOOLEAN ChangeBufferingStateRequestsPending;
|
|
BOOLEAN ResourceExclusivelyOwned;
|
|
|
|
RxAcquireSerializationMutex();
|
|
|
|
ChangeBufferingStateRequestsPending = BooleanFlagOn(pFcb->FcbState,FCB_STATE_BUFFERING_STATE_CHANGE_PENDING);
|
|
ResourceExclusivelyOwned = RxIsResourceOwnershipStateExclusive(pFcb->Header.Resource);
|
|
|
|
if (!ChangeBufferingStateRequestsPending) {
|
|
RxTrackerUpdateHistory(pRxContext,MrxFcb,'rrrr',LineNumber,FileName,SerialNumber);
|
|
ExReleaseResourceLite( pFcb->Header.Resource );
|
|
} else if (!ResourceExclusivelyOwned) {
|
|
RxTrackerUpdateHistory(pRxContext,MrxFcb,'rrr0',LineNumber,FileName,SerialNumber);
|
|
ExReleaseResourceLite( pFcb->Header.Resource );
|
|
}
|
|
|
|
RxReleaseSerializationMutex();
|
|
|
|
if (ChangeBufferingStateRequestsPending) {
|
|
if (ResourceExclusivelyOwned) {
|
|
ASSERT(RxIsFcbAcquiredExclusive(pFcb));
|
|
|
|
// If there are any buffering state change requests process them.
|
|
RxProcessFcbChangeBufferingStateRequest(pFcb);
|
|
|
|
RxTrackerUpdateHistory(pRxContext,MrxFcb,'rrr1',LineNumber,FileName,SerialNumber);
|
|
ExReleaseResourceLite( pFcb->Header.Resource );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
VOID
|
|
__RxReleaseFcbForThread(
|
|
IN PRX_CONTEXT pRxContext,
|
|
IN OUT PMRX_FCB MrxFcb,
|
|
IN ERESOURCE_THREAD ResourceThreadId
|
|
RX_FCBTRACKER_PARAMS
|
|
)
|
|
{
|
|
PFCB pFcb = (PFCB)MrxFcb;
|
|
BOOLEAN ChangeBufferingStateRequestsPending;
|
|
BOOLEAN ResourceExclusivelyOwned;
|
|
|
|
RxAcquireSerializationMutex();
|
|
|
|
ChangeBufferingStateRequestsPending = BooleanFlagOn(pFcb->FcbState,FCB_STATE_BUFFERING_STATE_CHANGE_PENDING);
|
|
ResourceExclusivelyOwned = RxIsResourceOwnershipStateExclusive(pFcb->Header.Resource);
|
|
|
|
if (!ChangeBufferingStateRequestsPending) {
|
|
RxTrackerUpdateHistory(pRxContext,MrxFcb,'rrtt',LineNumber,FileName,SerialNumber);
|
|
ExReleaseResourceForThreadLite( pFcb->Header.Resource, ResourceThreadId );
|
|
} else if (!ResourceExclusivelyOwned) {
|
|
RxTrackerUpdateHistory(pRxContext,MrxFcb,'rrt0',LineNumber,FileName,SerialNumber);
|
|
ExReleaseResourceForThreadLite( pFcb->Header.Resource, ResourceThreadId );
|
|
}
|
|
|
|
RxReleaseSerializationMutex();
|
|
|
|
|
|
if (ChangeBufferingStateRequestsPending) {
|
|
if (ResourceExclusivelyOwned) {
|
|
// If there are any buffering state change requests process them.
|
|
RxTrackerUpdateHistory(pRxContext,MrxFcb,'rrt1',LineNumber,FileName,SerialNumber);
|
|
|
|
RxProcessFcbChangeBufferingStateRequest(pFcb);
|
|
|
|
ExReleaseResourceForThreadLite( pFcb->Header.Resource, ResourceThreadId );
|
|
}
|
|
}
|
|
}
|
|
|
|
BOOLEAN
|
|
RxAcquireFcbForLazyWrite (
|
|
IN PVOID Fcb,
|
|
IN BOOLEAN Wait
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
The address of this routine is specified when creating a CacheMap for
|
|
a file. It is subsequently called by the Lazy Writer prior to its
|
|
performing lazy writes to the file.
|
|
|
|
Arguments:
|
|
|
|
Fcb - The Fcb which was specified as a context parameter for this
|
|
routine.
|
|
|
|
Wait - TRUE if the caller is willing to block.
|
|
|
|
Return Value:
|
|
|
|
FALSE - if Wait was specified as FALSE and blocking would have
|
|
been required. The Fcb is not acquired.
|
|
|
|
TRUE - if the Fcb has been acquired
|
|
|
|
--*/
|
|
{
|
|
BOOLEAN AcquiredFile;
|
|
//
|
|
// We assume the Lazy Writer only acquires this Fcb once.
|
|
// Therefore, it should be guaranteed that this flag is currently
|
|
// clear (the ASSERT), and then we will set this flag, to insure
|
|
// that the Lazy Writer will never try to advance Valid Data, and
|
|
// also not deadlock by trying to get the Fcb exclusive.
|
|
//
|
|
|
|
|
|
PAGED_CODE();
|
|
|
|
ASSERT( NodeType(((PFCB)Fcb)) == RDBSS_NTC_FCB );
|
|
ASSERT_CORRECT_FCB_STRUCTURE(((PFCB)Fcb));
|
|
ASSERT( ((PFCB)Fcb)->Specific.Fcb.LazyWriteThread == NULL );
|
|
|
|
AcquiredFile = RxAcquirePagingIoResourceShared(Fcb, Wait, NULL);
|
|
|
|
if (AcquiredFile) {
|
|
|
|
((PFCB)Fcb)->Specific.Fcb.LazyWriteThread = PsGetCurrentThread();
|
|
|
|
//
|
|
// This is a kludge because Cc is really the top level. When it
|
|
// enters the file system, we will think it is a resursive call
|
|
// and complete the request with hard errors or verify. It will
|
|
// then have to deal with them, somehow....
|
|
//
|
|
|
|
ASSERT(RxIsThisTheTopLevelIrp(NULL));
|
|
AcquiredFile = RxTryToBecomeTheTopLevelIrp(
|
|
NULL,
|
|
(PIRP)FSRTL_CACHE_TOP_LEVEL_IRP,
|
|
((PFCB)Fcb)->RxDeviceObject,
|
|
TRUE ); //force
|
|
|
|
if (!AcquiredFile) {
|
|
RxReleasePagingIoResource(Fcb,NULL);
|
|
((PFCB)Fcb)->Specific.Fcb.LazyWriteThread = NULL;
|
|
}
|
|
}
|
|
|
|
return AcquiredFile;
|
|
}
|
|
|
|
VOID
|
|
RxReleaseFcbFromLazyWrite (
|
|
IN PVOID Fcb
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
The address of this routine is specified when creating a CacheMap for
|
|
a file. It is subsequently called by the Lazy Writer after its
|
|
performing lazy writes to the file.
|
|
|
|
Arguments:
|
|
|
|
Fcb - The Fcb which was specified as a context parameter for this
|
|
routine.
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PAGED_CODE();
|
|
|
|
ASSERT( NodeType(((PFCB)Fcb)) == RDBSS_NTC_FCB );
|
|
ASSERT_CORRECT_FCB_STRUCTURE(((PFCB)Fcb));
|
|
|
|
((PFCB)Fcb)->Specific.Fcb.LazyWriteThread = NULL;
|
|
|
|
//
|
|
// Clear the kludge at this point.
|
|
//
|
|
|
|
// NTBUG #61902 this is a paged pool leak if the test fails....in fastfat, they assert
|
|
// that the condition is true.
|
|
|
|
if(RxGetTopIrpIfRdbssIrp() == (PIRP)FSRTL_CACHE_TOP_LEVEL_IRP){
|
|
RxUnwindTopLevelIrp( NULL );
|
|
}
|
|
|
|
RxReleasePagingIoResource(Fcb,NULL);
|
|
return;
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
RxAcquireFcbForReadAhead (
|
|
IN PVOID Fcb,
|
|
IN BOOLEAN Wait
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
The address of this routine is specified when creating a CacheMap for
|
|
a file. It is subsequently called by the Lazy Writer prior to its
|
|
performing read ahead to the file.
|
|
|
|
Arguments:
|
|
|
|
Fcb - The Fcb which was specified as a context parameter for this
|
|
routine.
|
|
|
|
Wait - TRUE if the caller is willing to block.
|
|
|
|
Return Value:
|
|
|
|
FALSE - if Wait was specified as FALSE and blocking would have
|
|
been required. The Fcb is not acquired.
|
|
|
|
TRUE - if the Fcb has been acquired
|
|
|
|
--*/
|
|
{
|
|
BOOLEAN AcquiredFile;
|
|
|
|
PAGED_CODE();
|
|
|
|
ASSERT_CORRECT_FCB_STRUCTURE(((PFCB)Fcb));
|
|
//
|
|
// We acquire the normal file resource shared here to synchronize
|
|
// correctly with purges.
|
|
//
|
|
|
|
if (!ExAcquireResourceSharedLite( ((PFCB)Fcb)->Header.Resource,
|
|
Wait )) {
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
//
|
|
// This is a kludge because Cc is really the top level. We it
|
|
// enters the file system, we will think it is a resursive call
|
|
// and complete the request with hard errors or verify. It will
|
|
// have to deal with them, somehow....
|
|
//
|
|
|
|
ASSERT(RxIsThisTheTopLevelIrp(NULL));
|
|
AcquiredFile = RxTryToBecomeTheTopLevelIrp(
|
|
NULL,
|
|
(PIRP)FSRTL_CACHE_TOP_LEVEL_IRP,
|
|
((PFCB)Fcb)->RxDeviceObject,
|
|
TRUE ); //force
|
|
|
|
if (!AcquiredFile) {
|
|
ExReleaseResourceLite( ((PFCB)Fcb)->Header.Resource );
|
|
}
|
|
|
|
return AcquiredFile;
|
|
}
|
|
|
|
|
|
VOID
|
|
RxReleaseFcbFromReadAhead (
|
|
IN PVOID Fcb
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
The address of this routine is specified when creating a CacheMap for
|
|
a file. It is subsequently called by the Lazy Writer after its
|
|
read ahead.
|
|
|
|
Arguments:
|
|
|
|
Fcb - The Fcb which was specified as a context parameter for this
|
|
routine.
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PAGED_CODE();
|
|
|
|
ASSERT_CORRECT_FCB_STRUCTURE(((PFCB)Fcb));
|
|
//
|
|
// Clear the kludge at this point.
|
|
//
|
|
|
|
ASSERT(RxGetTopIrpIfRdbssIrp() == (PIRP)FSRTL_CACHE_TOP_LEVEL_IRP);
|
|
RxUnwindTopLevelIrp( NULL );
|
|
|
|
ExReleaseResourceLite( ((PFCB)Fcb)->Header.Resource );
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
RxNoOpAcquire (
|
|
IN PVOID Fcb,
|
|
IN BOOLEAN Wait
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine does nothing.
|
|
|
|
Arguments:
|
|
|
|
Fcb - The Fcb/Dcb/Vcb which was specified as a context parameter for this
|
|
routine.
|
|
|
|
Wait - TRUE if the caller is willing to block.
|
|
|
|
Return Value:
|
|
|
|
TRUE
|
|
|
|
--*/
|
|
{
|
|
BOOLEAN AcquiredFile;
|
|
|
|
UNREFERENCED_PARAMETER( Wait );
|
|
|
|
PAGED_CODE();
|
|
|
|
//
|
|
// This is a kludge because Cc is really the top level. We it
|
|
// enters the file system, we will think it is a resursive call
|
|
// and complete the request with hard errors or verify. It will
|
|
// have to deal with them, somehow....
|
|
//
|
|
|
|
ASSERT(RxIsThisTheTopLevelIrp(NULL));
|
|
AcquiredFile = RxTryToBecomeTheTopLevelIrp(
|
|
NULL,
|
|
(PIRP)FSRTL_CACHE_TOP_LEVEL_IRP,
|
|
((PFCB)Fcb)->RxDeviceObject,
|
|
TRUE ); //force
|
|
|
|
return AcquiredFile;
|
|
}
|
|
|
|
VOID
|
|
RxNoOpRelease (
|
|
IN PVOID Fcb
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine does nothing.
|
|
|
|
Arguments:
|
|
|
|
Fcb - The Fcb/Dcb/Vcb which was specified as a context parameter for this
|
|
routine.
|
|
|
|
Return Value:
|
|
|
|
None
|
|
|
|
--*/
|
|
{
|
|
PAGED_CODE();
|
|
|
|
//
|
|
// Clear the kludge at this point.
|
|
//
|
|
|
|
ASSERT(RxGetTopIrpIfRdbssIrp() == (PIRP)FSRTL_CACHE_TOP_LEVEL_IRP);
|
|
RxUnwindTopLevelIrp( NULL );
|
|
|
|
UNREFERENCED_PARAMETER( Fcb );
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
VOID
|
|
RxVerifyOperationIsLegal ( RXCOMMON_SIGNATURE )
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
This routine determines is the requested operation should be allowed to
|
|
continue. It either returns to the user if the request is Okay, or
|
|
raises an appropriate status.
|
|
|
|
Arguments:
|
|
|
|
Irp - Supplies the Irp to check
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
{
|
|
RxCaptureRequestPacket;
|
|
RxCaptureParamBlock;
|
|
RxCaptureFileObject;
|
|
RxCaptureFobx;
|
|
|
|
#if DBG
|
|
ULONG SaveExceptionFlag; //to save the state of breakpoint-on-exception for this context
|
|
#endif
|
|
|
|
PAGED_CODE();
|
|
|
|
//
|
|
// If the Irp is not present, then we got here via close.
|
|
//
|
|
//
|
|
|
|
if ( capReqPacket == NULL ) {
|
|
|
|
return;
|
|
}
|
|
|
|
//
|
|
// If there is not a file object, we cannot continue.
|
|
//
|
|
|
|
if ( capFileObject == NULL ) {
|
|
|
|
return;
|
|
}
|
|
|
|
RxSaveAndSetExceptionNoBreakpointFlag(RxContext,SaveExceptionFlag);
|
|
|
|
if (capFobx) {
|
|
PSRV_OPEN pSrvOpen = (PSRV_OPEN)capFobx->SrvOpen;
|
|
|
|
////
|
|
//// If this fileobject is messed up for some reason--such as a
|
|
//// disconnection or a deferredopen that failed--then just get out.
|
|
////
|
|
//
|
|
//if (FlagOn(capFobx->Flags,FOBX_FLAG_BAD_HANDLE)) {
|
|
//
|
|
// RxRaiseStatus( RxContext, STATUS_INVALID_HANDLE );
|
|
//}
|
|
|
|
//
|
|
// If we are trying to do any other operation than close on a file
|
|
// object that has been renamed, raise RxStatus(FILE_RENAMED).
|
|
//
|
|
|
|
if ((pSrvOpen != NULL) &&
|
|
( RxContext->MajorFunction != IRP_MJ_CLEANUP ) &&
|
|
( RxContext->MajorFunction != IRP_MJ_CLOSE ) &&
|
|
( FlagOn(pSrvOpen->Flags,SRVOPEN_FLAG_FILE_RENAMED))) {
|
|
|
|
RxRaiseStatus( RxContext, STATUS_FILE_RENAMED );
|
|
}
|
|
|
|
//
|
|
// If we are trying to do any other operation than close on a file
|
|
// object that has been deleted, raise RxStatus(FILE_DELETED).
|
|
//
|
|
|
|
if ((pSrvOpen != NULL) &&
|
|
( RxContext->MajorFunction != IRP_MJ_CLEANUP ) &&
|
|
( RxContext->MajorFunction != IRP_MJ_CLOSE ) &&
|
|
( FlagOn(pSrvOpen->Flags,SRVOPEN_FLAG_FILE_DELETED))) {
|
|
|
|
RxRaiseStatus( RxContext, STATUS_FILE_DELETED );
|
|
}
|
|
}
|
|
|
|
//
|
|
// If we are doing a create, and there is a related file object, and
|
|
// it it is marked for delete, raise RxStatus(DELETE_PENDING).
|
|
//
|
|
|
|
if ( RxContext->MajorFunction == IRP_MJ_CREATE ) {
|
|
|
|
PFILE_OBJECT RelatedFileObject;
|
|
|
|
RelatedFileObject = capFileObject->RelatedFileObject;
|
|
|
|
if ( (RelatedFileObject != NULL) &&
|
|
FlagOn(((PFCB)RelatedFileObject->FsContext)->FcbState,
|
|
FCB_STATE_DELETE_ON_CLOSE) ) {
|
|
|
|
RxRaiseStatus( RxContext, STATUS_DELETE_PENDING );
|
|
}
|
|
}
|
|
|
|
//
|
|
// If the file object has already been cleaned up, and
|
|
//
|
|
// A) This request is a paging io read or write, or
|
|
// B) This request is a close operation, or
|
|
// C) This request is a set or query info call (for Lou)
|
|
// D) This is an MDL complete
|
|
//
|
|
// let it pass, otherwise return RxStatus(FILE_CLOSED).
|
|
//
|
|
|
|
if ( FlagOn(capFileObject->Flags, FO_CLEANUP_COMPLETE) ) {
|
|
|
|
if ( (FlagOn(capReqPacket->Flags, IRP_PAGING_IO)) ||
|
|
(capPARAMS->MajorFunction == IRP_MJ_CLOSE ) ||
|
|
(capPARAMS->MajorFunction == IRP_MJ_SET_INFORMATION) ||
|
|
(capPARAMS->MajorFunction == IRP_MJ_QUERY_INFORMATION) ||
|
|
( ( (capPARAMS->MajorFunction == IRP_MJ_READ) ||
|
|
(capPARAMS->MajorFunction == IRP_MJ_WRITE) ) &&
|
|
FlagOn(capPARAMS->MinorFunction, IRP_MN_COMPLETE) ) ) {
|
|
|
|
NOTHING;
|
|
|
|
} else {
|
|
|
|
RxRaiseStatus( RxContext, STATUS_FILE_CLOSED );
|
|
}
|
|
}
|
|
|
|
RxRestoreExceptionNoBreakpointFlag(RxContext,SaveExceptionFlag);
|
|
return;
|
|
}
|
|
|
|
VOID
|
|
RxAcquireFileForNtCreateSection (
|
|
IN PFILE_OBJECT FileObject
|
|
)
|
|
|
|
{
|
|
NTSTATUS Status;
|
|
PMRX_FCB pFcb = (PMRX_FCB)FileObject->FsContext;
|
|
|
|
PAGED_CODE();
|
|
|
|
Status = RxAcquireExclusiveFcb( NULL, pFcb );
|
|
|
|
//DbgPrint("came thru RxAcquireFileForNtCreateSection\n");
|
|
|
|
DbgDoit(
|
|
if (Status != STATUS_SUCCESS) {
|
|
RxBugCheck((ULONG_PTR)pFcb, 0, 0);
|
|
}
|
|
)
|
|
|
|
((PFCB)pFcb)->CreateSectionThread = PsGetCurrentThread();
|
|
}
|
|
|
|
VOID
|
|
RxReleaseFileForNtCreateSection (
|
|
IN PFILE_OBJECT FileObject
|
|
)
|
|
|
|
{
|
|
PMRX_FCB pFcb = (PMRX_FCB)FileObject->FsContext;
|
|
|
|
PAGED_CODE();
|
|
|
|
((PFCB)pFcb)->CreateSectionThread = NULL;
|
|
|
|
RxReleaseFcb( NULL, pFcb );
|
|
|
|
}
|
|
|
|
NTSTATUS
|
|
RxAcquireForCcFlush (
|
|
IN PFILE_OBJECT FileObject,
|
|
IN PDEVICE_OBJECT DeviceObject
|
|
)
|
|
{
|
|
return STATUS_INVALID_DEVICE_REQUEST;
|
|
}
|
|
|
|
|
|
NTSTATUS
|
|
RxReleaseForCcFlush (
|
|
IN PFILE_OBJECT FileObject,
|
|
IN PDEVICE_OBJECT DeviceObject
|
|
)
|
|
{
|
|
return STATUS_INVALID_DEVICE_REQUEST;
|
|
}
|
|
|
|
VOID
|
|
RxTrackPagingIoResource(
|
|
PVOID pInstance,
|
|
ULONG Type,
|
|
ULONG Line,
|
|
PCHAR File)
|
|
{
|
|
PFCB Fcb = (PFCB)pInstance;
|
|
|
|
switch(Type) {
|
|
case 1:
|
|
case 2:
|
|
Fcb->PagingIoResourceFile = File;
|
|
Fcb->PagingIoResourceLine = Line;
|
|
break;
|
|
case 3:
|
|
Fcb->PagingIoResourceFile = NULL;
|
|
Fcb->PagingIoResourceLine = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
switch (Type) {
|
|
case 1:
|
|
RxWmiLog(PAGEIORES,
|
|
RxTrackPagingIoResource_1,
|
|
LOGPTR(pInstance)
|
|
LOGULONG(Line)
|
|
LOGARSTR(File));
|
|
break;
|
|
case 2:
|
|
RxWmiLog(PAGEIORES,
|
|
RxTrackPagingIoResource_2,
|
|
LOGPTR(pInstance)
|
|
LOGULONG(Line)
|
|
LOGARSTR(File));
|
|
break;
|
|
case 3:
|
|
RxWmiLog(PAGEIORES,
|
|
RxTrackPagingIoResource_3,
|
|
LOGPTR(pInstance)
|
|
LOGULONG(Line)
|
|
LOGARSTR(File));
|
|
break;
|
|
} */
|
|
}
|
|
|