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windows-server-2003/base/ntos/fsrtl/fsrtlp.h

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/*++
Copyright (c) 1989 Microsoft Corporation
Module Name:
FsRtlP.h
Abstract:
This module defines private part of the File System Rtl component
Author:
Gary Kimura [GaryKi] 30-Jul-1990
Revision History:
--*/
#ifndef _FSRTLP_
#define _FSRTLP_
#pragma warning(disable:4214) // bit field types other than int
#pragma warning(disable:4201) // nameless struct/union
#pragma warning(disable:4127) // condition expression is constant
#pragma warning(disable:4115) // named type definition in parentheses
#pragma warning(disable:4706) // assignment within conditional expression
#include <ntos.h>
#include <FsRtl.h>
#include <NtDdFt.h>
#include <zwapi.h>
#define FsRtlAllocatePool(PoolType, NumberOfBytes ) \
ExAllocatePoolWithTag((POOL_TYPE)((PoolType) | POOL_RAISE_IF_ALLOCATION_FAILURE), \
NumberOfBytes, \
'trSF')
#define FsRtlAllocatePoolWithQuota(PoolType, NumberOfBytes ) \
ExAllocatePoolWithQuotaTag((POOL_TYPE)((PoolType) | POOL_RAISE_IF_ALLOCATION_FAILURE), \
NumberOfBytes, \
'trSF')
#define FsRtlpAllocatePool(a,b) FsRtlAllocatePoolWithTag((a),(b),MODULE_POOL_TAG)
//
// The global FsRtl debug level variable, its values are:
//
// 0x00000000 Always gets printed (used when about to bug check)
//
// 0x00000001 Error conditions
// 0x00000002 Debug hooks
// 0x00000004
// 0x00000008
//
// 0x00000010
// 0x00000020
// 0x00000040
// 0x00000080
//
// 0x00000100
// 0x00000200
// 0x00000400
// 0x00000800
//
// 0x00001000
// 0x00002000
// 0x00004000
// 0x00008000
//
// 0x00010000
// 0x00020000
// 0x00040000
// 0x00080000
//
// 0x00100000
// 0x00200000
// 0x00400000
// 0x00800000
//
// 0x01000000
// 0x02000000
// 0x04000000 NotifyChange routines
// 0x08000000 Oplock routines
//
// 0x10000000 Name routines
// 0x20000000 FileLock routines
// 0x40000000 Vmcb routines
// 0x80000000 Mcb routines
//
//
// Debug trace support
//
#ifdef FSRTLDBG
extern LONG FsRtlDebugTraceLevel;
extern LONG FsRtlDebugTraceIndent;
#define DebugTrace(INDENT,LEVEL,X,Y) { \
LONG _i; \
if (((LEVEL) == 0) || (FsRtlDebugTraceLevel & (LEVEL))) { \
_i = (ULONG)PsGetCurrentThread(); \
DbgPrint("%08lx:",_i); \
if ((INDENT) < 0) { \
FsRtlDebugTraceIndent += (INDENT); \
} \
if (FsRtlDebugTraceIndent < 0) { \
FsRtlDebugTraceIndent = 0; \
} \
for (_i=0; _i<FsRtlDebugTraceIndent; _i+=1) { \
DbgPrint(" "); \
} \
DbgPrint(X,Y); \
if ((INDENT) > 0) { \
FsRtlDebugTraceIndent += (INDENT); \
} \
} \
}
#define DebugDump(STR,LEVEL,PTR) { \
ULONG _i; \
VOID FsRtlDump(); \
if (((LEVEL) == 0) || (FsRtlDebugTraceLevel & (LEVEL))) { \
_i = (ULONG)PsGetCurrentThread(); \
DbgPrint("%08lx:",_i); \
DbgPrint(STR); \
if (PTR != NULL) {FsRtlDump(PTR);} \
DbgBreakPoint(); \
} \
}
#else
#define DebugTrace(INDENT,LEVEL,X,Y) {NOTHING;}
#define DebugDump(STR,LEVEL,PTR) {NOTHING;}
#endif // FSRTLDBG
//
// Miscellaneous support routines
//
VOID
FsRtlInitializeFileLocks (
VOID
);
VOID
FsRtlInitializeLargeMcbs (
VOID
);
VOID
FsRtlInitializeTunnels(
VOID
);
NTSTATUS
FsRtlInitializeWorkerThread (
VOID
);
//
// This macro returns TRUE if a flag in a set of flags is on and FALSE
// otherwise
//
#define FlagOn(Flags,SingleFlag) ((Flags) & (SingleFlag))
#define BooleanFlagOn(Flags,SingleFlag) ((BOOLEAN)(((Flags) & (SingleFlag)) != 0))
#define SetFlag(F,SF) { \
(F) |= (SF); \
}
#define ClearFlag(F,SF) { \
(F) &= ~(SF); \
}
//
// This macro takes a pointer (or ulong) and returns its rounded up word
// value
//
#define WordAlign(Ptr) ( \
((((ULONG_PTR)(Ptr)) + 1) & -2) \
)
//
// This macro takes a pointer (or ulong) and returns its rounded up longword
// value
//
#define LongAlign(Ptr) ( \
((((ULONG_PTR)(Ptr)) + 3) & -4) \
)
//
// This macro takes a pointer (or ulong) and returns its rounded up quadword
// value
//
#define QuadAlign(Ptr) ( \
((((ULONG_PTR)(Ptr)) + 7) & -8) \
)
//
// This macro takes a ulong and returns its value rounded up to a sector
// boundary
//
#define SectorAlign(Ptr) ( \
((((ULONG_PTR)(Ptr)) + 511) & -512) \
)
//
// This macro takes a number of bytes and returns the number of sectors
// required to contain that many bytes, i.e., it sector aligns and divides
// by the size of a sector.
//
#define SectorsFromBytes(bytes) ( \
((bytes) + 511) / 512 \
)
//
// This macro takes a number of sectors and returns the number of bytes
// contained in that many sectors.
//
#define BytesFromSectors(sectors) ( \
(sectors) * 512 \
)
//
// The following types and macros are used to help unpack the packed and
// misaligned fields found in the Bios parameter block
//
typedef union _UCHAR1 {
UCHAR Uchar[1];
UCHAR ForceAlignment;
} UCHAR1, *PUCHAR1;
typedef union _UCHAR2 {
UCHAR Uchar[2];
USHORT ForceAlignment;
} UCHAR2, *PUCHAR2;
typedef union _UCHAR4 {
UCHAR Uchar[4];
ULONG ForceAlignment;
} UCHAR4, *PUCHAR4;
//
// This macro copies an unaligned src byte to an aligned dst byte
//
#define CopyUchar1(Dst,Src) { \
*((UCHAR1 *)(Dst)) = *((UNALIGNED UCHAR1 *)(Src)); \
}
//
// This macro copies an unaligned src word to an aligned dst word
//
#define CopyUchar2(Dst,Src) { \
*((UCHAR2 *)(Dst)) = *((UNALIGNED UCHAR2 *)(Src)); \
}
//
// This macro copies an unaligned src longword to an aligned dsr longword
//
#define CopyUchar4(Dst,Src) { \
*((UCHAR4 *)(Dst)) = *((UNALIGNED UCHAR4 *)(Src)); \
}
//
// The following macros are used to establish the semantics needed
// to do a return from within a try-finally clause. As a rule every
// try clause must end with a label call try_exit. For example,
//
// try {
// :
// :
//
// try_exit: NOTHING;
// } finally {
//
// :
// :
// }
//
// Every return statement executed inside of a try clause should use the
// try_return macro. If the compiler fully supports the try-finally construct
// then the macro should be
//
// #define try_return(S) { return(S); }
//
// If the compiler does not support the try-finally construct then the macro
// should be
//
// #define try_return(S) { S; goto try_exit; }
//
#define try_return(S) { S; goto try_exit; }
#define GET_FAST_IO_DISPATCH(DevObj) \
((DevObj)->DriverObject->FastIoDispatch)
#define GET_FS_FILTER_CALLBACKS(DevObj) \
((DevObj)->DriverObject->DriverExtension->FsFilterCallbacks)
//
// Macro for validating the FastIo dispatch routines before calling
// them in the FastIo pass through functions.
//
#define VALID_FAST_IO_DISPATCH_HANDLER(FastIoDispatchPtr, FieldName) \
(((FastIoDispatchPtr) != NULL) && \
(((FastIoDispatchPtr)->SizeOfFastIoDispatch) >= \
(FIELD_OFFSET(FAST_IO_DISPATCH, FieldName) + sizeof(VOID *))) && \
((FastIoDispatchPtr)->FieldName != NULL))
#define VALID_FS_FILTER_CALLBACK_HANDLER(FsFilterCallbackPtr, FieldName) \
(((FsFilterCallbackPtr) != NULL) && \
(((FsFilterCallbackPtr)->SizeOfFsFilterCallbacks) >= \
(FIELD_OFFSET(FS_FILTER_CALLBACKS, FieldName) + sizeof(VOID *))) && \
((FsFilterCallbackPtr)->FieldName != NULL))
#define FSRTL_FILTER_MEMORY_TAG 'gmSF'
typedef struct _FS_FILTER_COMPLETION_NODE {
PDEVICE_OBJECT DeviceObject;
PFILE_OBJECT FileObject;
PVOID CompletionContext;
PFS_FILTER_COMPLETION_CALLBACK CompletionCallback;
} FS_FILTER_COMPLETION_NODE, *PFS_FILTER_COMPLETION_NODE;
#define FS_FILTER_DEFAULT_STACK_SIZE 15
typedef struct _FS_FILTER_COMPLETION_STACK {
USHORT StackLength;
USHORT NextStackPosition;
PFS_FILTER_COMPLETION_NODE Stack;
FS_FILTER_COMPLETION_NODE DefaultStack[FS_FILTER_DEFAULT_STACK_SIZE];
} FS_FILTER_COMPLETION_STACK, *PFS_FILTER_COMPLETION_STACK;
typedef struct _FS_FILTER_CTRL {
FS_FILTER_CALLBACK_DATA Data;
ULONG Flags;
ULONG Reserved;
FS_FILTER_COMPLETION_STACK CompletionStack;
} FS_FILTER_CTRL, *PFS_FILTER_CTRL;
//
// Flag values for FS_FILTER_CTRL
//
#define FS_FILTER_ALLOCATED_COMPLETION_STACK 0x00000001
#define FS_FILTER_USED_RESERVE_POOL 0x00000002
#define FS_FILTER_CHANGED_DEVICE_STACKS 0x00000004
NTSTATUS
FsFilterInit(
);
NTSTATUS
FsFilterAllocateCompletionStack (
IN PFS_FILTER_CTRL FsFilterCtrl,
IN BOOLEAN CanFail,
OUT PULONG AllocationSize
);
VOID
FsFilterFreeCompletionStack (
IN PFS_FILTER_CTRL FsFilterCtrl
);
NTSTATUS
FsFilterCtrlInit (
IN OUT PFS_FILTER_CTRL FsFilterCtrl,
IN UCHAR Operation,
IN PDEVICE_OBJECT DeviceObject,
IN PDEVICE_OBJECT BaseFsDeviceObject,
IN PFILE_OBJECT FileObject,
IN BOOLEAN CanFail
);
VOID
FsFilterCtrlFree (
IN PFS_FILTER_CTRL FsFilterCtrl
);
#define PUSH_COMPLETION_NODE( completionStack ) \
(((completionStack)->NextStackPosition < (completionStack)->StackLength ) ? \
&(completionStack)->Stack[(completionStack)->NextStackPosition++] : \
(ASSERT( FALSE ), NULL) )
#define POP_COMPLETION_NODE( completionStack ) \
(ASSERT((completionStack)->NextStackPosition > 0), \
((completionStack)->NextStackPosition--))
#define GET_COMPLETION_NODE( completionStack ) \
(ASSERT((completionStack)->NextStackPosition > 0),\
(&(completionStack)->Stack[(completionStack)->NextStackPosition-1]))
#define FS_FILTER_HAVE_COMPLETIONS( fsFilterCtrl ) \
((fsFilterCtrl)->CompletionStack.NextStackPosition > 0)
VOID
FsFilterGetCallbacks (
IN UCHAR Operation,
IN PDEVICE_OBJECT DeviceObject,
OUT PFS_FILTER_CALLBACK *PreOperationCallback,
OUT PFS_FILTER_COMPLETION_CALLBACK *PostOperationCallback
);
NTSTATUS
FsFilterPerformCallbacks (
IN PFS_FILTER_CTRL FsFilterCtrl,
IN BOOLEAN AllowFilterToFail,
IN BOOLEAN AllowBaseFsToFail,
OUT BOOLEAN *BaseFsFailedOp
);
VOID
FsFilterPerformCompletionCallbacks(
IN PFS_FILTER_CTRL FsFilterCtrl,
IN NTSTATUS OperationStatus
);
#endif // _FSRTLP_