/*++ Copyright (c) 1989 Microsoft Corporation Module Name: FsRtlP.c Abstract: This module declares the global data used by the FsRtl Module Author: Gary Kimura [GaryKi] 30-Jul-1990 Revision History: --*/ #include "FsRtlP.h" #define COMPATIBILITY_MODE_KEY_NAME L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\FileSystem" #define COMPATIBILITY_MODE_VALUE_NAME L"Win95TruncatedExtensions" #define KEY_WORK_AREA ((sizeof(KEY_VALUE_FULL_INFORMATION) + \ sizeof(ULONG)) + 64) #ifdef FSRTLDBG LONG FsRtlDebugTraceLevel = 0x0000000f; LONG FsRtlDebugTraceIndent = 0; #endif // FSRTLDBG // // Local Support routine // NTSTATUS FsRtlGetCompatibilityModeValue ( IN PUNICODE_STRING ValueName, IN OUT PULONG Value ); #ifdef ALLOC_PRAGMA #pragma alloc_text(PAGE, FsRtlAllocateResource) #pragma alloc_text(INIT, FsRtlInitSystem) #pragma alloc_text(INIT, FsRtlGetCompatibilityModeValue) #endif // // Define the number of resources, a pointer to them and a counter for // resource selection. // #define FSRTL_NUMBER_OF_RESOURCES (16) PERESOURCE FsRtlPagingIoResources; #ifdef ALLOC_DATA_PRAGMA #pragma data_seg("PAGEDATA") #endif ULONG FsRtlPagingIoResourceSelector = 0; BOOLEAN FsRtlSafeExtensions = TRUE; #ifdef ALLOC_DATA_PRAGMA #pragma data_seg() #endif // // The global static legal ANSI character array. Wild characters // are not considered legal, they should be checked seperately if // allowed. // #define _FAT_ FSRTL_FAT_LEGAL #define _HPFS_ FSRTL_HPFS_LEGAL #define _NTFS_ FSRTL_NTFS_LEGAL #define _OLE_ FSRTL_OLE_LEGAL #define _WILD_ FSRTL_WILD_CHARACTER static const UCHAR LocalLegalAnsiCharacterArray[128] = { 0 , // 0x00 ^@ _OLE_, // 0x01 ^A _OLE_, // 0x02 ^B _OLE_, // 0x03 ^C _OLE_, // 0x04 ^D _OLE_, // 0x05 ^E _OLE_, // 0x06 ^F _OLE_, // 0x07 ^G _OLE_, // 0x08 ^H _OLE_, // 0x09 ^I _OLE_, // 0x0A ^J _OLE_, // 0x0B ^K _OLE_, // 0x0C ^L _OLE_, // 0x0D ^M _OLE_, // 0x0E ^N _OLE_, // 0x0F ^O _OLE_, // 0x10 ^P _OLE_, // 0x11 ^Q _OLE_, // 0x12 ^R _OLE_, // 0x13 ^S _OLE_, // 0x14 ^T _OLE_, // 0x15 ^U _OLE_, // 0x16 ^V _OLE_, // 0x17 ^W _OLE_, // 0x18 ^X _OLE_, // 0x19 ^Y _OLE_, // 0x1A ^Z _OLE_, // 0x1B ESC _OLE_, // 0x1C FS _OLE_, // 0x1D GS _OLE_, // 0x1E RS _OLE_, // 0x1F US _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x20 space _FAT_ | _HPFS_ | _NTFS_ , // 0x21 ! _WILD_| _OLE_, // 0x22 " _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x23 # _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x24 $ _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x25 % _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x26 & _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x27 ' _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x28 ( _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x29 ) _WILD_| _OLE_, // 0x2A * _HPFS_ | _NTFS_ | _OLE_, // 0x2B + _HPFS_ | _NTFS_ | _OLE_, // 0x2C , _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x2D - _FAT_ | _HPFS_ | _NTFS_ , // 0x2E . 0 , // 0x2F / _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x30 0 _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x31 1 _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x32 2 _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x33 3 _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x34 4 _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x35 5 _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x36 6 _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x37 7 _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x38 8 _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x39 9 _NTFS_ , // 0x3A : _HPFS_ | _NTFS_ | _OLE_, // 0x3B ; _WILD_| _OLE_, // 0x3C < _HPFS_ | _NTFS_ | _OLE_, // 0x3D = _WILD_| _OLE_, // 0x3E > _WILD_| _OLE_, // 0x3F ? _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x40 @ _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x41 A _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x42 B _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x43 C _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x44 D _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x45 E _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x46 F _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x47 G _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x48 H _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x49 I _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x4A J _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x4B K _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x4C L _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x4D M _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x4E N _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x4F O _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x50 P _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x51 Q _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x52 R _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x53 S _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x54 T _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x55 U _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x56 V _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x57 W _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x58 X _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x59 Y _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x5A Z _HPFS_ | _NTFS_ | _OLE_, // 0x5B [ 0 , // 0x5C backslash _HPFS_ | _NTFS_ | _OLE_, // 0x5D ] _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x5E ^ _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x5F _ _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x60 ` _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x61 a _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x62 b _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x63 c _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x64 d _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x65 e _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x66 f _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x67 g _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x68 h _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x69 i _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x6A j _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x6B k _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x6C l _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x6D m _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x6E n _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x6F o _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x70 p _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x71 q _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x72 r _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x73 s _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x74 t _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x75 u _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x76 v _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x77 w _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x78 x _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x79 y _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x7A z _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x7B { 0 | _OLE_, // 0x7C | _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x7D } _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x7E ~ _FAT_ | _HPFS_ | _NTFS_ | _OLE_, // 0x7F  }; UCHAR const* const FsRtlLegalAnsiCharacterArray = &LocalLegalAnsiCharacterArray[0]; // // This routine is called during phase one initialization. // BOOLEAN FsRtlInitSystem ( ) { ULONG i; ULONG Value; UNICODE_STRING ValueName; extern KSEMAPHORE FsRtlpUncSemaphore; PAGED_CODE(); // // Allocate and initialize all the paging Io resources // FsRtlPagingIoResources = FsRtlAllocatePool( NonPagedPool, FSRTL_NUMBER_OF_RESOURCES * sizeof(ERESOURCE) ); for (i=0; i < FSRTL_NUMBER_OF_RESOURCES; i++) { ExInitializeResourceLite( &FsRtlPagingIoResources[i] ); } // // Initialize the global tunneling structures. // FsRtlInitializeTunnels(); // // Initialize the global filelock structures. // FsRtlInitializeFileLocks(); // // Initialize the global largemcb structures. // FsRtlInitializeLargeMcbs(); // // Initialize the semaphore used to guard loading of the MUP // KeInitializeSemaphore( &FsRtlpUncSemaphore, 1, MAXLONG ); // // Pull the bit from the registry telling us whether to do a safe // or dangerous extension truncation. // ValueName.Buffer = COMPATIBILITY_MODE_VALUE_NAME; ValueName.Length = sizeof(COMPATIBILITY_MODE_VALUE_NAME) - sizeof(WCHAR); ValueName.MaximumLength = sizeof(COMPATIBILITY_MODE_VALUE_NAME); if (NT_SUCCESS(FsRtlGetCompatibilityModeValue( &ValueName, &Value )) && (Value != 0)) { FsRtlSafeExtensions = FALSE; } // // Initialize the FsRtl stack overflow work QueueObject and thread. // if (!NT_SUCCESS(FsRtlInitializeWorkerThread())) { return FALSE; } // // Initialize the FsFilter component of FsRtl. // if (!NT_SUCCESS(FsFilterInit())) { return FALSE; } return TRUE; } PERESOURCE FsRtlAllocateResource ( ) /*++ Routine Description: This routine is used to allocate a resource from the FsRtl pool. Arguments: Return Value: PERESOURCE - A pointer to the provided resource. --*/ { PAGED_CODE(); return &FsRtlPagingIoResources[ FsRtlPagingIoResourceSelector++ % FSRTL_NUMBER_OF_RESOURCES]; } // // Local Support routine // NTSTATUS FsRtlGetCompatibilityModeValue ( IN PUNICODE_STRING ValueName, IN OUT PULONG Value ) /*++ Routine Description: Given a unicode value name this routine will go into the registry location for the Chicago compatibilitymode information and get the value. Arguments: ValueName - the unicode name for the registry value located in the double space configuration location of the registry. Value - a pointer to the ULONG for the result. Return Value: NTSTATUS If STATUS_SUCCESSFUL is returned, the location *Value will be updated with the DWORD value from the registry. If any failing status is returned, this value is untouched. --*/ { HANDLE Handle; NTSTATUS Status; ULONG RequestLength; ULONG ResultLength; UCHAR Buffer[KEY_WORK_AREA]; UNICODE_STRING KeyName; OBJECT_ATTRIBUTES ObjectAttributes; PKEY_VALUE_FULL_INFORMATION KeyValueInformation; KeyName.Buffer = COMPATIBILITY_MODE_KEY_NAME; KeyName.Length = sizeof(COMPATIBILITY_MODE_KEY_NAME) - sizeof(WCHAR); KeyName.MaximumLength = sizeof(COMPATIBILITY_MODE_KEY_NAME); InitializeObjectAttributes(&ObjectAttributes, &KeyName, OBJ_CASE_INSENSITIVE, NULL, NULL); Status = ZwOpenKey(&Handle, KEY_READ, &ObjectAttributes); if (!NT_SUCCESS(Status)) { return Status; } RequestLength = KEY_WORK_AREA; KeyValueInformation = (PKEY_VALUE_FULL_INFORMATION)Buffer; while (1) { Status = ZwQueryValueKey(Handle, ValueName, KeyValueFullInformation, KeyValueInformation, RequestLength, &ResultLength); ASSERT( Status != STATUS_BUFFER_OVERFLOW ); if (Status == STATUS_BUFFER_OVERFLOW) { // // Try to get a buffer big enough. // if (KeyValueInformation != (PKEY_VALUE_FULL_INFORMATION)Buffer) { ExFreePool(KeyValueInformation); } RequestLength += 256; KeyValueInformation = (PKEY_VALUE_FULL_INFORMATION) ExAllocatePoolWithTag(PagedPool, RequestLength, ' taF'); if (!KeyValueInformation) { return STATUS_NO_MEMORY; } } else { break; } } ZwClose(Handle); if (NT_SUCCESS(Status)) { if (KeyValueInformation->DataLength != 0) { PULONG DataPtr; // // Return contents to the caller. // DataPtr = (PULONG) ((PUCHAR)KeyValueInformation + KeyValueInformation->DataOffset); *Value = *DataPtr; } else { // // Treat as if no value was found // Status = STATUS_OBJECT_NAME_NOT_FOUND; } } if (KeyValueInformation != (PKEY_VALUE_FULL_INFORMATION)Buffer) { ExFreePool(KeyValueInformation); } return Status; }