129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
/*++
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Copyright (c) Microsoft Corporation. All rights reserved.
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You may only use this code if you agree to the terms of the Windows Research Kernel Source Code License agreement (see License.txt).
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If you do not agree to the terms, do not use the code.
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Module Name:
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vfirpdb.h
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Abstract:
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This header exposes prototypes for functions used to manage the database of
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IRP tracking data.
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--*/
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struct _IOV_DATABASE_HEADER;
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typedef struct _IOV_DATABASE_HEADER IOV_DATABASE_HEADER;
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typedef struct _IOV_DATABASE_HEADER *PIOV_DATABASE_HEADER;
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typedef enum _IOV_REFERENCE_TYPE {
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IOVREFTYPE_PACKET = 0,
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IOVREFTYPE_POINTER
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} IOV_REFERENCE_TYPE;
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typedef enum {
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IRPDBEVENT_POINTER_COUNT_ZERO = 1,
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IRPDBEVENT_REFERENCE_COUNT_ZERO
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} IRP_DATABASE_EVENT;
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typedef VOID (*PFN_IRPDBEVENT_CALLBACK)(
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IN PIOV_DATABASE_HEADER IovHeader,
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IN PIRP TrackedIrp OPTIONAL,
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IN IRP_DATABASE_EVENT Event
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);
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typedef struct _IOV_DATABASE_HEADER {
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PIRP TrackedIrp; // Tracked IRP
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KSPIN_LOCK HeaderLock; // Spinlock on data structure
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KIRQL LockIrql; // IRQL taken at.
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LONG ReferenceCount; // # of reasons to keep this packet
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LONG PointerCount; // # of reasons to track by irp addr
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ULONG HeaderFlags;
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LIST_ENTRY HashLink; // Link in hash table.
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LIST_ENTRY ChainLink; // Head is HeadPacket
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PIOV_DATABASE_HEADER ChainHead; // First packet in a chain.
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PFN_IRPDBEVENT_CALLBACK NotificationCallback;
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};
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VOID
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FASTCALL
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VfIrpDatabaseInit(
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VOID
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);
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BOOLEAN
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FASTCALL
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VfIrpDatabaseEntryInsertAndLock(
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IN PIRP Irp,
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IN PFN_IRPDBEVENT_CALLBACK NotificationCallback,
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IN OUT PIOV_DATABASE_HEADER IovHeader
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);
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PIOV_DATABASE_HEADER
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FASTCALL
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VfIrpDatabaseEntryFindAndLock(
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IN PIRP Irp
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);
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VOID
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FASTCALL
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VfIrpDatabaseEntryAcquireLock(
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IN PIOV_DATABASE_HEADER IovHeader OPTIONAL
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);
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VOID
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FASTCALL
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VfIrpDatabaseEntryReleaseLock(
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IN PIOV_DATABASE_HEADER IovHeader
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);
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VOID
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FASTCALL
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VfIrpDatabaseEntryReference(
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IN PIOV_DATABASE_HEADER IovHeader,
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IN IOV_REFERENCE_TYPE IovRefType
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);
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VOID
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FASTCALL
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VfIrpDatabaseEntryDereference(
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IN PIOV_DATABASE_HEADER IovHeader,
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IN IOV_REFERENCE_TYPE IovRefType
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);
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VOID
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FASTCALL
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VfIrpDatabaseEntryAppendToChain(
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IN OUT PIOV_DATABASE_HEADER IovExistingHeader,
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IN OUT PIOV_DATABASE_HEADER IovNewHeader
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);
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VOID
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FASTCALL
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VfIrpDatabaseEntryRemoveFromChain(
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IN OUT PIOV_DATABASE_HEADER IovHeader
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);
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PIOV_DATABASE_HEADER
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FASTCALL
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VfIrpDatabaseEntryGetChainPrevious(
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IN PIOV_DATABASE_HEADER IovHeader
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);
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PIOV_DATABASE_HEADER
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FASTCALL
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VfIrpDatabaseEntryGetChainNext(
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IN PIOV_DATABASE_HEADER IovHeader
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);
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