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/*++
Copyright (c) 1999 - 2002 Microsoft Corporation
Module Name:
MetadataManagerProc.h
Abstract:
This is the header file defining the functions of the kernel mode
filter driver implementing filter metadata management.
Environment:
Kernel mode
--*/
#define MAKE_RESOURCE_OWNER(X) (((ERESOURCE_THREAD)(X)) | 0x3)
//
// Functions implemented in operations.c
//
FLT_PREOP_CALLBACK_STATUS
FmmPreCreate (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_Flt_CompletionContext_Outptr_ PVOID *CompletionContext
);
FLT_POSTOP_CALLBACK_STATUS
FmmPostCreate (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_In_ PVOID CbdContext,
_In_ FLT_POST_OPERATION_FLAGS Flags
);
FLT_PREOP_CALLBACK_STATUS
FmmPreCleanup (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_Flt_CompletionContext_Outptr_ PVOID *CompletionContext
);
FLT_POSTOP_CALLBACK_STATUS
FmmPostCleanup (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_Inout_ PVOID CompletionContext,
_In_ FLT_POST_OPERATION_FLAGS Flags
);
FLT_PREOP_CALLBACK_STATUS
FmmPreFSControl (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_Flt_CompletionContext_Outptr_ PVOID *CompletionContext
);
FLT_POSTOP_CALLBACK_STATUS
FmmPostFSControl (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_In_ PVOID CompletionContext,
_In_ FLT_POST_OPERATION_FLAGS Flags
);
FLT_PREOP_CALLBACK_STATUS
FmmPreDeviceControl (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_Flt_CompletionContext_Outptr_ PVOID *CompletionContext
);
FLT_POSTOP_CALLBACK_STATUS
FmmPostDeviceControl (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_In_ PVOID CbdContext,
_In_ FLT_POST_OPERATION_FLAGS Flags
);
FLT_PREOP_CALLBACK_STATUS
FmmPreShutdown (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_Flt_CompletionContext_Outptr_ PVOID *CompletionContext
);
FLT_PREOP_CALLBACK_STATUS
FmmPrePnp (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_Flt_CompletionContext_Outptr_ PVOID *CompletionContext
);
FLT_POSTOP_CALLBACK_STATUS
FmmPostPnp (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_In_ PVOID CbdContext,
_In_ FLT_POST_OPERATION_FLAGS Flags
);
//
// Functions implemented in datastore.c
//
_Requires_lock_held_(_Global_critical_region_)
_Requires_lock_held_(InstanceContext->MetadataResource)
_IRQL_requires_max_(PASSIVE_LEVEL)
NTSTATUS
FmmOpenMetadata (
_In_ PFMM_INSTANCE_CONTEXT InstanceContext,
_In_ BOOLEAN CreateIfNotPresent
);
_Requires_lock_held_(_Global_critical_region_)
_Requires_lock_held_(InstanceContext->MetadataResource)
_IRQL_requires_max_(PASSIVE_LEVEL)
VOID
FmmCloseMetadata (
_In_ PFMM_INSTANCE_CONTEXT InstanceContext
);
NTSTATUS
FmmReleaseMetadataFileReferences (
_Inout_ PFLT_CALLBACK_DATA Cbd
);
NTSTATUS
FmmReacquireMetadataFileReferences (
_Inout_ PFLT_CALLBACK_DATA Cbd
);
NTSTATUS
FmmSetMetadataOpenTriggerFileObject (
_Inout_ PFLT_CALLBACK_DATA Cbd
);
_Releases_lock_(_Global_critical_region_)
_Requires_lock_held_(InstanceContext->MetadataResource)
_Releases_lock_(InstanceContext->MetadataResource)
_IRQL_requires_max_(APC_LEVEL)
VOID
FmmBeginFileSystemOperation (
IN PFMM_INSTANCE_CONTEXT InstanceContext
);
_Acquires_lock_(_Global_critical_region_)
_Requires_lock_not_held_(InstanceContext->MetadataResource)
_Acquires_exclusive_lock_(InstanceContext->MetadataResource)
_IRQL_requires_max_(APC_LEVEL)
VOID
FmmEndFileSystemOperation (
IN PFMM_INSTANCE_CONTEXT InstanceContext
);
#if VERIFY_METADATA_OPENED
NTSTATUS
FmmIsMetadataOpen (
_Inout_ PFLT_CALLBACK_DATA Cbd,
_Out_ BOOLEAN* MetadataOpen
);
#endif
//
// Functions implemented in support.c
//
NTSTATUS
FmmAllocateUnicodeString (
_Inout_ PUNICODE_STRING String
);
VOID
FmmFreeUnicodeString (
_Inout_ PUNICODE_STRING String
);
BOOLEAN
FmmTargetIsVolumeOpen (
_In_ PFLT_CALLBACK_DATA Cbd
);
NTSTATUS
FmmIsImplicitVolumeLock(
_In_ PFLT_CALLBACK_DATA Cbd,
_Out_ PBOOLEAN IsLock
);
//
// Lock primitives
//
_Acquires_lock_(_Global_critical_region_)
_IRQL_requires_max_(APC_LEVEL)
FORCEINLINE
VOID
FmmAcquireResourceExclusive (
_Inout_ _Requires_lock_not_held_(*_Curr_) _Acquires_exclusive_lock_(*_Curr_)
PERESOURCE Resource
)
{
FLT_ASSERT(KeGetCurrentIrql() <= APC_LEVEL);
FLT_ASSERT(ExIsResourceAcquiredExclusiveLite(Resource) ||
!ExIsResourceAcquiredSharedLite(Resource));
KeEnterCriticalRegion();
(VOID)ExAcquireResourceExclusiveLite( Resource, TRUE );
}
_Acquires_lock_(_Global_critical_region_)
_IRQL_requires_max_(APC_LEVEL)
FORCEINLINE
VOID
FmmAcquireResourceShared (
_Inout_ _Requires_lock_not_held_(*_Curr_) _Acquires_shared_lock_(*_Curr_)
PERESOURCE Resource
)
{
FLT_ASSERT(KeGetCurrentIrql() <= APC_LEVEL);
KeEnterCriticalRegion();
(VOID)ExAcquireResourceSharedLite( Resource, TRUE );
}
_Releases_lock_(_Global_critical_region_)
_IRQL_requires_max_(APC_LEVEL)
FORCEINLINE
VOID
FmmReleaseResource (
_Inout_ _Requires_lock_held_(*_Curr_) _Releases_lock_(*_Curr_)
PERESOURCE Resource
)
{
FLT_ASSERT(KeGetCurrentIrql() <= DISPATCH_LEVEL);
FLT_ASSERT(ExIsResourceAcquiredExclusiveLite(Resource) ||
ExIsResourceAcquiredSharedLite(Resource));
ExReleaseResourceLite(Resource);
KeLeaveCriticalRegion();
}
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