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[NTOSKRNL]

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svn path=/trunk/; revision=49759
This commit is contained in:
Pierre Schweitzer 2010-11-23 20:05:33 +00:00
parent 1ab061dba1
commit 92967f5f41
1 changed files with 8 additions and 0 deletions
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8
reactos/ntoskrnl/fsrtl/filtrctx.c
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@ -187,31 +187,39 @@ FsRtlInsertPerFileObjectContext(IN PFILE_OBJECT FileObject,
return STATUS_INVALID_DEVICE_REQUEST; return STATUS_INVALID_DEVICE_REQUEST;
} }
/* Get filter contexts */
FOContext = IoGetFileObjectFilterContext(FileObject); FOContext = IoGetFileObjectFilterContext(FileObject);
if (!FOContext) if (!FOContext)
{ {
/* If there's none, allocate new structure */
FOContext = ExAllocatePoolWithTag(NonPagedPool, sizeof(FILE_OBJECT_FILTER_CONTEXTS), 'FOCX'); FOContext = ExAllocatePoolWithTag(NonPagedPool, sizeof(FILE_OBJECT_FILTER_CONTEXTS), 'FOCX');
if (!FOContext) if (!FOContext)
{ {
return STATUS_INSUFFICIENT_RESOURCES; return STATUS_INSUFFICIENT_RESOURCES;
} }
/* Initialize it */
ExInitializeFastMutex(&(FOContext->FilterContextsMutex)); ExInitializeFastMutex(&(FOContext->FilterContextsMutex));
InitializeListHead(&(FOContext->FilterContexts)); InitializeListHead(&(FOContext->FilterContexts));
/* Set it */
if (!IoChangeFileObjectFilterContext(FileObject, FOContext, TRUE)) if (!IoChangeFileObjectFilterContext(FileObject, FOContext, TRUE))
{ {
/* If it fails, it means that someone else has set it in the meanwhile */
ExFreePoolWithTag(FOContext, 'FOCX'); ExFreePoolWithTag(FOContext, 'FOCX');
/* So, we can get it */
FOContext = IoGetFileObjectFilterContext(FileObject); FOContext = IoGetFileObjectFilterContext(FileObject);
if (!FOContext) if (!FOContext)
{ {
/* If we fall down here, something went very bad. This shouldn't happen */
ASSERT(FALSE); ASSERT(FALSE);
return STATUS_UNSUCCESSFUL; return STATUS_UNSUCCESSFUL;
} }
} }
} }
/* Finally, insert */
ExAcquireFastMutex(&(FOContext->FilterContextsMutex)); ExAcquireFastMutex(&(FOContext->FilterContextsMutex));
InsertHeadList(&(FOContext->FilterContexts), &(Ptr->Links)); InsertHeadList(&(FOContext->FilterContexts), &(Ptr->Links));
ExReleaseFastMutex(&(FOContext->FilterContextsMutex)); ExReleaseFastMutex(&(FOContext->FilterContextsMutex));