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Major refactoring: IRP_MJ_CREATE

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This commit is contained in:
Bill Zissimopoulos 2015-12-24 11:53:21 -08:00
parent 78c5fdb6f2
commit 645dafa5c6
1 changed files with 0 additions and 72 deletions
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72
src0/sys/fileobj.c
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@ -1,72 +0,0 @@
/**
* @file sys/fileobj.c
*
* @copyright 2015 Bill Zissimopoulos
*/
#include <sys/driver.h>
NTSTATUS FspFileContextCreate(PDEVICE_OBJECT DeviceObject,
ULONG ExtraSize, FSP_FILE_CONTEXT **PFsContext);
VOID FspFileContextDelete(FSP_FILE_CONTEXT *Context);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFileContextCreate)
#pragma alloc_text(PAGE, FspFileContextDelete)
#endif
NTSTATUS FspFileContextCreate(PDEVICE_OBJECT DeviceObject,
ULONG ExtraSize, FSP_FILE_CONTEXT **PFsContext)
{
PAGED_CODE();
*PFsContext = 0;
FSP_FILE_CONTEXT_NONPAGED *NonPaged = FspAllocNonPaged(sizeof *NonPaged);
if (0 == NonPaged)
return STATUS_INSUFFICIENT_RESOURCES;
FSP_FILE_CONTEXT *FsContext = FspAlloc(sizeof *FsContext + ExtraSize);
if (0 == FsContext)
{
FspFree(NonPaged);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlZeroMemory(NonPaged, sizeof *NonPaged);
ExInitializeResourceLite(&NonPaged->Resource);
ExInitializeResourceLite(&NonPaged->PagingIoResource);
ExInitializeFastMutex(&NonPaged->HeaderFastMutex);
RtlZeroMemory(FsContext, sizeof *FsContext + ExtraSize);
FsContext->Header.NodeTypeCode = FspFileContextFileKind;
FsContext->Header.NodeByteSize = sizeof *FsContext;
FsContext->Header.IsFastIoPossible = FastIoIsQuestionable;
FsContext->Header.Resource = &NonPaged->Resource;
FsContext->Header.PagingIoResource = &NonPaged->PagingIoResource;
FsRtlSetupAdvancedHeader(&FsContext->Header, &NonPaged->HeaderFastMutex);
FsContext->NonPaged = NonPaged;
FsContext->RefCount = 1;
FsContext->FsvolDeviceObject = DeviceObject;
FspDeviceRetain(FsContext->FsvolDeviceObject);
RtlInitEmptyUnicodeString(&FsContext->FileName, FsContext->FileNameBuf, (USHORT)ExtraSize);
*PFsContext = FsContext;
return STATUS_SUCCESS;
}
VOID FspFileContextDelete(FSP_FILE_CONTEXT *FsContext)
{
PAGED_CODE();
FsRtlTeardownPerStreamContexts(&FsContext->Header);
FspDeviceRelease(FsContext->FsvolDeviceObject);
ExDeleteResourceLite(&FsContext->NonPaged->PagingIoResource);
ExDeleteResourceLite(&FsContext->NonPaged->Resource);
FspFree(FsContext->NonPaged);
FspFree(FsContext);
}