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