588 lines
19 KiB
C
588 lines
19 KiB
C
/*++
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joejoe most of this will just disappear....VBO will remain......
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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Rx.h
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Abstract:
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This module defines the on-disk structure of the Rx file system.
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Author:
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Gary Kimura [GaryKi] 28-Dec-1989
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Revision History:
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--*/
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#ifndef _RDBSS_
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#define _RDBSS_
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//
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// The following nomenclature is used to describe the Rx on-disk
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// structure:
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//
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// LBN - is the number of a sector relative to the start of the disk.
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//
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// VBN - is the number of a sector relative to the start of a file,
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// directory, or allocation.
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//
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// LBO - is a byte offset relative to the start of the disk.
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//
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// VBO - is a byte offset relative to the start of a file, directory
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// or allocation.
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//
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//typedef ULONG LBO;
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//typedef LBO *PLBO;
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//typedef ULONG VBO;
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//typedef LONGLONG RXVBO;
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//typedef VBO *PVBO;
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#if 0
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//
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// The boot sector is the first physical sector (LBN == 0) on the volume.
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// Part of the sector contains a BIOS Parameter Block. The BIOS in the
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// sector is packed (i.e., unaligned) so we'll supply a unpacking macro
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// to translate a packed BIOS into its unpacked equivalent. The unpacked
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// BIOS structure is already defined in ntioapi.h so we only need to define
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// the packed BIOS.
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//
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//
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// Define the Packed and Unpacked BIOS Parameter Block
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//
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typedef struct _PACKED_BIOS_PARAMETER_BLOCK {
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UCHAR BytesPerSector[2]; // offset = 0x000 0
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UCHAR SectorsPerCluster[1]; // offset = 0x002 2
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UCHAR ReservedSectors[2]; // offset = 0x003 3
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UCHAR Rxs[1]; // offset = 0x005 5
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UCHAR RootEntries[2]; // offset = 0x006 6
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UCHAR Sectors[2]; // offset = 0x008 8
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UCHAR Media[1]; // offset = 0x00A 10
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UCHAR SectorsPerRx[2]; // offset = 0x00B 11
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UCHAR SectorsPerTrack[2]; // offset = 0x00D 13
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UCHAR Heads[2]; // offset = 0x00F 15
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UCHAR HiddenSectors[4]; // offset = 0x011 17
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UCHAR LargeSectors[4]; // offset = 0x015 21
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} PACKED_BIOS_PARAMETER_BLOCK; // sizeof = 0x019 25
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typedef PACKED_BIOS_PARAMETER_BLOCK *PPACKED_BIOS_PARAMETER_BLOCK;
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typedef struct BIOS_PARAMETER_BLOCK {
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USHORT BytesPerSector;
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UCHAR SectorsPerCluster;
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USHORT ReservedSectors;
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UCHAR Rxs;
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USHORT RootEntries;
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USHORT Sectors;
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UCHAR Media;
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USHORT SectorsPerRx;
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USHORT SectorsPerTrack;
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USHORT Heads;
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ULONG HiddenSectors;
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ULONG LargeSectors;
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} BIOS_PARAMETER_BLOCK, *PBIOS_PARAMETER_BLOCK;
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//
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// This macro takes a Packed BIOS and fills in its Unpacked equivalent
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//
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#define RxUnpackBios(Bios,Pbios) { \
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CopyUchar2(&(Bios)->BytesPerSector, &(Pbios)->BytesPerSector[0] ); \
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CopyUchar1(&(Bios)->SectorsPerCluster, &(Pbios)->SectorsPerCluster[0]); \
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CopyUchar2(&(Bios)->ReservedSectors, &(Pbios)->ReservedSectors[0] ); \
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CopyUchar1(&(Bios)->Rxs, &(Pbios)->Rxs[0] ); \
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CopyUchar2(&(Bios)->RootEntries, &(Pbios)->RootEntries[0] ); \
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CopyUchar2(&(Bios)->Sectors, &(Pbios)->Sectors[0] ); \
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CopyUchar1(&(Bios)->Media, &(Pbios)->Media[0] ); \
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CopyUchar2(&(Bios)->SectorsPerRx, &(Pbios)->SectorsPerRx[0] ); \
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CopyUchar2(&(Bios)->SectorsPerTrack, &(Pbios)->SectorsPerTrack[0] ); \
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CopyUchar2(&(Bios)->Heads, &(Pbios)->Heads[0] ); \
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CopyUchar4(&(Bios)->HiddenSectors, &(Pbios)->HiddenSectors[0] ); \
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CopyUchar4(&(Bios)->LargeSectors, &(Pbios)->LargeSectors[0] ); \
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}
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//
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// Define the boot sector
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//
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typedef struct _PACKED_BOOT_SECTOR {
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UCHAR Jump[3]; // offset = 0x000 0
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UCHAR Oem[8]; // offset = 0x003 3
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PACKED_BIOS_PARAMETER_BLOCK PackedBpb; // offset = 0x00B 11
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UCHAR PhysicalDriveNumber; // offset = 0x024 36
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UCHAR Reserved; // offset = 0x025 37
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UCHAR Signature; // offset = 0x026 38
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UCHAR Id[4]; // offset = 0x027 39
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UCHAR VolumeLabel[11]; // offset = 0x02B 43
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UCHAR SystemId[8]; // offset = 0x036 54
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} PACKED_BOOT_SECTOR; // sizeof = 0x03E 62
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typedef PACKED_BOOT_SECTOR *PPACKED_BOOT_SECTOR;
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//
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// Define a Rx Entry type.
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//
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// This type is used when representing a rx table entry. It also used
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// to be used when dealing with a rx table index and a count of entries,
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// but the ensuing type casting nightmare sealed this rxe. These other
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// two types are represented as ULONGs.
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//
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typedef USHORT RDBSS_ENTRY;
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typedef RDBSS_ENTRY *PRDBSS_ENTRY;
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#define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(RDBSS_ENTRY))
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//
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// The following constants the are the valid Rx index values.
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//
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#define RDBSS_CLUSTER_AVAILABLE (RDBSS_ENTRY)0x0000
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#define RDBSS_CLUSTER_RESERVED (RDBSS_ENTRY)0xfff0
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#define RDBSS_CLUSTER_BAD (RDBSS_ENTRY)0xfff7
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#define RDBSS_CLUSTER_LAST (RDBSS_ENTRY)0xffff
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//
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// Rx files have the following time/date structures. Note that the
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// following structure is a 32 bits long but USHORT aligned.
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//
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typedef struct _RDBSS_TIME {
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USHORT DoubleSeconds : 5;
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USHORT Minute : 6;
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USHORT Hour : 5;
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} RDBSS_TIME;
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typedef RDBSS_TIME *PRDBSS_TIME;
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typedef struct _RDBSS_DATE {
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USHORT Day : 5;
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USHORT Month : 4;
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USHORT Year : 7; // Relative to 1980
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} RDBSS_DATE;
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typedef RDBSS_DATE *PRDBSS_DATE;
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typedef struct _RDBSS_TIME_STAMP {
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RDBSS_TIME Time;
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RDBSS_DATE Date;
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} RDBSS_TIME_STAMP;
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typedef RDBSS_TIME_STAMP *PRDBSS_TIME_STAMP;
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//
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// Rx files have 8 character file names and 3 character extensions
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//
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typedef UCHAR RDBSS8DOT3[11];
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typedef RDBSS8DOT3 *PRDBSS8DOT3;
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//
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// The directory entry record exists for every file/directory on the
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// disk except for the root directory.
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//
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typedef struct _PACKED_DIRENT {
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RDBSS8DOT3 FileName; // offset = 0
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UCHAR Attributes; // offset = 11
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UCHAR NtByte; // offset = 12
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UCHAR CreationMSec; // offset = 13
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RDBSS_TIME_STAMP CreationTime; // offset = 14
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RDBSS_DATE LastAccessDate; // offset = 18
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USHORT ExtendedAttributes; // offset = 20
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RDBSS_TIME_STAMP LastWriteTime; // offset = 22
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RDBSS_ENTRY FirstClusterOfFile; // offset = 26
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ULONG FileSize; // offset = 28
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} PACKED_DIRENT; // sizeof = 32
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typedef PACKED_DIRENT *PPACKED_DIRENT;
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//
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// A packed dirent is already quadword aligned so simply declare a dirent as a
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// packed dirent
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//
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typedef PACKED_DIRENT DIRENT;
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typedef DIRENT *PDIRENT;
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//
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// The first byte of a dirent describes the dirent. There is also a routine
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// to help in deciding how to interpret the dirent.
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//
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#define RDBSS_DIRENT_NEVER_USED 0x00
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#define RDBSS_DIRENT_REALLY_0E5 0x05
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#define RDBSS_DIRENT_DIRECTORY_ALIAS 0x2e
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#define RDBSS_DIRENT_DELETED 0xe5
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//
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// Define the NtByte bits.
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//
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#define RDBSS_DIRENT_NT_BYTE_DIRTY 0x01
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#define RDBSS_DIRENT_NT_BYTE_TEST_SURFACE 0x02
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#define RDBSS_DIRENT_NT_BYTE_8_LOWER_CASE 0x08
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#define RDBSS_DIRENT_NT_BYTE_3_LOWER_CASE 0x10
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//
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// Define the various dirent attributes
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//
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#define RDBSS_DIRENT_ATTR_READ_ONLY 0x01
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#define RDBSS_DIRENT_ATTR_HIDDEN 0x02
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#define RDBSS_DIRENT_ATTR_SYSTEM 0x04
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#define RDBSS_DIRENT_ATTR_VOLUME_ID 0x08
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#define RDBSS_DIRENT_ATTR_DIRECTORY 0x10
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#define RDBSS_DIRENT_ATTR_ARCHIVE 0x20
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#define RDBSS_DIRENT_ATTR_DEVICE 0x40
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#define RDBSS_DIRENT_ATTR_LFN (RDBSS_DIRENT_ATTR_READ_ONLY | \
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RDBSS_DIRENT_ATTR_HIDDEN | \
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RDBSS_DIRENT_ATTR_SYSTEM | \
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RDBSS_DIRENT_ATTR_VOLUME_ID)
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//
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// These macros convert a number of fields in the Bpb to bytes from sectors
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//
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// ULONG
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// RxBytesPerCluster (
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// IN PBIOS_PARAMETER_BLOCK Bios
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// );
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//
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// ULONG
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// RxBytesPerRx (
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// IN PBIOS_PARAMETER_BLOCK Bios
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// );
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//
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// ULONG
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// RxReservedBytes (
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// IN PBIOS_PARAMETER_BLOCK Bios
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// );
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//
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#define RxBytesPerCluster(B) ((ULONG)((B)->BytesPerSector * (B)->SectorsPerCluster))
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#define RxBytesPerRx(B) ((ULONG)((B)->BytesPerSector * (B)->SectorsPerRx))
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#define RxReservedBytes(B) ((ULONG)((B)->BytesPerSector * (B)->ReservedSectors))
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//
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// This macro returns the size of the root directory dirent area in bytes
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//
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// ULONG
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// RxRootDirectorySize (
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// IN PBIOS_PARAMETER_BLOCK Bios
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// );
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//
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#define RxRootDirectorySize(B) ((ULONG)((B)->RootEntries * sizeof(DIRENT)))
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//
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// This macro returns the first Lbo (zero based) of the root directory on
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// the device. This area is after the reserved and rxs.
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//
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// LBO
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// RxRootDirectoryLbo (
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// IN PBIOS_PARAMETER_BLOCK Bios
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// );
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//
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#define RxRootDirectoryLbo(B) (RxReservedBytes(B) + ((B)->Rxs * RxBytesPerRx(B)))
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//
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// This macro returns the first Lbo (zero based) of the file area on the
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// the device. This area is after the reserved, rxs, and root directory.
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//
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// LBO
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// RxFirstFileAreaLbo (
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// IN PBIOS_PARAMTER_BLOCK Bios
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// );
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//
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#define RxFileAreaLbo(B) (RxRootDirectoryLbo(B) + RxRootDirectorySize(B))
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//
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// This macro returns the number of clusters on the disk. This value is
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// computed by taking the total sectors on the disk subtracting up to the
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// first file area sector and then dividing by the sectors per cluster count.
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// Note that I don't use any of the above macros since far too much
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// superfluous sector/byte conversion would take place.
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//
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// ULONG
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// RxNumberOfClusters (
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// IN PBIOS_PARAMETER_BLOCK Bios
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// );
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//
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#define RxNumberOfClusters(B) ( \
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\
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(((B)->Sectors + (B)->LargeSectors \
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\
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- ((B)->ReservedSectors + \
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(B)->Rxs * (B)->SectorsPerRx + \
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(B)->RootEntries * sizeof(DIRENT) / (B)->BytesPerSector ) ) \
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\
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/ \
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\
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(B)->SectorsPerCluster) \
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)
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//
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// This macro returns the rx table bit size (i.e., 12 or 16 bits)
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//
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// ULONG
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// RxIndexBitSize (
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// IN PBIOS_PARAMETER_BLOCK Bios
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// );
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//
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#define RxIndexBitSize(B) ((UCHAR)(RxNumberOfClusters(B) < 4087 ? 12 : 16))
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//
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// This macro raises RxStatus(FILE_CORRUPT) and marks the Fcb bad if an
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// index value is not within the proper range.
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// Note that the first two index values are invalid (0, 1), so we must
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// add two from the top end to make sure the everything is within range
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//
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// VOID
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// RxVerifyIndexIsValid (
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// IN PRX_CONTEXT RxContext,
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// IN PVCB Vcb,
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// IN ULONG Index
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// );
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//
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#define RxVerifyIndexIsValid(IC,V,I) { \
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if (((I) < 2) || ((I) > ((V)->AllocationSupport.NumberOfClusters + 1))) { \
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RxRaiseStatus(IC,RxStatus(FILE_CORRUPT_ERROR)); \
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} \
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}
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//
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// These two macros are used to translate between Logical Byte Offsets,
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// and rx entry indexes. Note the use of variables stored in the Vcb.
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// These two macros are used at a higher level than the other macros
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// above.
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//
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// LBO
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// GetLboFromRxIndex (
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// IN RDBSS_ENTRY Rx_Index,
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// IN PVCB Vcb
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// );
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//
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// RDBSS_ENTRY
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// GetRxIndexFromLbo (
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// IN LBO Lbo,
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// IN PVCB Vcb
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// );
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//
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#define RxGetLboFromIndex(VCB,RDBSS_INDEX) ( \
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(VCB)->AllocationSupport.FileAreaLbo + \
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((LBO)((RDBSS_INDEX) - 2) << (VCB)->AllocationSupport.LogOfBytesPerCluster) \
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)
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#define RxGetIndexFromLbo(VCB,LBO) ( \
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(((LBO) - (VCB)->AllocationSupport.FileAreaLbo) >> \
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(VCB)->AllocationSupport.LogOfBytesPerCluster) + 2 \
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)
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//
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// The following macro does the tmp shifting and such to lookup an entry
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//
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// VOID
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// RxLookup12BitEntry(
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// IN PVOID Rx,
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// IN RDBSS_ENTRY Index,
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// OUT PRDBSS_ENTRY Entry
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// );
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//
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#define RxLookup12BitEntry(RDBSS,INDEX,ENTRY) { \
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\
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CopyUchar2((PUCHAR)(ENTRY), (PUCHAR)(RDBSS) + (INDEX) * 3 / 2); \
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\
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*ENTRY = ((INDEX) & 1) ? *(ENTRY) >> 4 : (RDBSS_ENTRY)(*(ENTRY) & 0xfff); \
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}
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//
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// The following macro does the tmp shifting and such to store an entry
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//
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// VOID
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// RxSet12BitEntry(
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// IN PVOID Rx,
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// IN RDBSS_ENTRY Index,
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// IN RDBSS_ENTRY Entry
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// );
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//
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#define RxSet12BitEntry(RDBSS,INDEX,ENTRY) { \
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\
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RDBSS_ENTRY TmpRxEntry; \
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\
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CopyUchar2((PUCHAR)&TmpRxEntry, (PUCHAR)(RDBSS) + (INDEX) * 3 / 2); \
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\
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TmpRxEntry = (RDBSS_ENTRY) \
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(((INDEX) & 1) ? ((ENTRY) << 4) | (TmpRxEntry & 0xf) \
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: (ENTRY) | (TmpRxEntry & 0xf000)); \
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\
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*((UNALIGNED UCHAR2 *)((PUCHAR)(RDBSS) + (INDEX) * 3 / 2)) = *((UNALIGNED UCHAR2 *)(&TmpRxEntry)); \
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}
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//
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// The following macro compares two RDBSS_TIME_STAMPs
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//
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#define RxAreTimesEqual(TIME1,TIME2) ((BOOLEAN) \
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(RtlCompareMemory((TIME1),(TIME2), sizeof(RDBSS_TIME_STAMP)) == \
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sizeof(RDBSS_TIME_STAMP)) \
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)
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#define EA_FILE_SIGNATURE (0x4445) // "ED"
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#define EA_SET_SIGNATURE (0x4145) // "EA"
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//
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// If the volume contains any ea data then there is one EA file called
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// "EA DATA. SF" located in the root directory as Hidden, System and
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// ReadOnly.
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//
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typedef struct _EA_FILE_HEADER {
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USHORT Signature; // offset = 0
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USHORT FormatType; // offset = 2
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USHORT LogType; // offset = 4
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USHORT Cluster1; // offset = 6
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USHORT NewCValue1; // offset = 8
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USHORT Cluster2; // offset = 10
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USHORT NewCValue2; // offset = 12
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USHORT Cluster3; // offset = 14
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USHORT NewCValue3; // offset = 16
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USHORT Handle; // offset = 18
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USHORT NewHOffset; // offset = 20
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UCHAR Reserved[10]; // offset = 22
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USHORT EaBaseTable[240]; // offset = 32
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} EA_FILE_HEADER; // sizeof = 512
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typedef EA_FILE_HEADER *PEA_FILE_HEADER;
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typedef USHORT EA_OFF_TABLE[128];
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typedef EA_OFF_TABLE *PEA_OFF_TABLE;
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//
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// Every file with an extended attribute contains in its dirent an index
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// into the EaMapTable. The map table contains an offset within the ea
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// file (cluster aligned) of the ea data for the file. The individual
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// ea data for each file is prefaced with an Ea Data Header.
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//
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typedef struct _EA_SET_HEADER {
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USHORT Signature; // offset = 0
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USHORT OwnEaHandle; // offset = 2
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ULONG NeedEaCount; // offset = 4
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UCHAR OwnerFileName[14]; // offset = 8
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UCHAR Reserved[4]; // offset = 22
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UCHAR cbList[4]; // offset = 26
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UCHAR PackedEas[1]; // offset = 30
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} EA_SET_HEADER; // sizeof = 30
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typedef EA_SET_HEADER *PEA_SET_HEADER;
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#define SIZE_OF_EA_SET_HEADER 30
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#define MAXIMUM_EA_SIZE 0x0000ffff
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#define GetcbList(EASET) (((EASET)->cbList[0] << 0) + \
|
||
((EASET)->cbList[1] << 8) + \
|
||
((EASET)->cbList[2] << 16) + \
|
||
((EASET)->cbList[3] << 24))
|
||
|
||
#define SetcbList(EASET,CB) { \
|
||
(EASET)->cbList[0] = (CB >> 0) & 0x0ff; \
|
||
(EASET)->cbList[1] = (CB >> 8) & 0x0ff; \
|
||
(EASET)->cbList[2] = (CB >> 16) & 0x0ff; \
|
||
(EASET)->cbList[3] = (CB >> 24) & 0x0ff; \
|
||
}
|
||
|
||
//
|
||
// Every individual ea in an ea set is declared the following packed ea
|
||
//
|
||
|
||
typedef struct _PACKED_EA {
|
||
UCHAR Flags;
|
||
UCHAR EaNameLength;
|
||
UCHAR EaValueLength[2];
|
||
CHAR EaName[1];
|
||
} PACKED_EA;
|
||
typedef PACKED_EA *PPACKED_EA;
|
||
|
||
//
|
||
// The following two macros are used to get and set the ea value length
|
||
// field of a packed ea
|
||
//
|
||
// VOID
|
||
// GetEaValueLength (
|
||
// IN PPACKED_EA Ea,
|
||
// OUT PUSHORT ValueLength
|
||
// );
|
||
//
|
||
// VOID
|
||
// SetEaValueLength (
|
||
// IN PPACKED_EA Ea,
|
||
// IN USHORT ValueLength
|
||
// );
|
||
//
|
||
|
||
#define GetEaValueLength(EA,LEN) { \
|
||
*(LEN) = 0; \
|
||
CopyUchar2( (LEN), (EA)->EaValueLength ); \
|
||
}
|
||
|
||
#define SetEaValueLength(EA,LEN) { \
|
||
CopyUchar2( &((EA)->EaValueLength), (LEN) ); \
|
||
}
|
||
|
||
//
|
||
// The following macro is used to get the size of a packed ea
|
||
//
|
||
// VOID
|
||
// SizeOfPackedEa (
|
||
// IN PPACKED_EA Ea,
|
||
// OUT PUSHORT EaSize
|
||
// );
|
||
//
|
||
|
||
#define SizeOfPackedEa(EA,SIZE) { \
|
||
ULONG _NL,_DL; _NL = 0; _DL = 0; \
|
||
CopyUchar1(&_NL, &(EA)->EaNameLength); \
|
||
GetEaValueLength(EA, &_DL); \
|
||
*(SIZE) = 1 + 1 + 2 + _NL + 1 + _DL; \
|
||
}
|
||
|
||
#define EA_NEED_EA_FLAG 0x80
|
||
#define MIN_EA_HANDLE 1
|
||
#define MAX_EA_HANDLE 30719
|
||
#define UNUSED_EA_HANDLE 0xffff
|
||
#define EA_CBLIST_OFFSET 0x1a
|
||
#define MAX_EA_BASE_INDEX 240
|
||
#define MAX_EA_OFFSET_INDEX 128
|
||
|
||
#endif
|
||
#endif // _RDBSS_
|
||
|