mirror of
https://github.com/reactos/reactos.git
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Alex Vlasov
- Move and rewrite FAT ondisk structures to a standalone header file fat.h. svn path=/trunk/; revision=38982
This commit is contained in:
Aleksey Bragin
parent
f2e519c99a
commit
5862fb9aaa
2 changed files with 299 additions and 161 deletions
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@ -4,167 +4,7 @@
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#include <debug.h>
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/* FAT on-disk data structures */
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#include <pshpack1.h>
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struct _BootSector
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{
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unsigned char magic0, res0, magic1;
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unsigned char OEMName[8];
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unsigned short BytesPerSector;
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unsigned char SectorsPerCluster;
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unsigned short ReservedSectors;
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unsigned char FATCount;
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unsigned short RootEntries, Sectors;
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unsigned char Media;
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unsigned short FATSectors, SectorsPerTrack, Heads;
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unsigned long HiddenSectors, SectorsHuge;
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unsigned char Drive, Res1, Sig;
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unsigned long VolumeID;
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unsigned char VolumeLabel[11], SysType[8];
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unsigned char Res2[448];
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unsigned short Signatur1;
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};
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struct _BootSector32
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{
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unsigned char magic0, res0, magic1; // 0
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unsigned char OEMName[8]; // 3
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unsigned short BytesPerSector; // 11
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unsigned char SectorsPerCluster; // 13
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unsigned short ReservedSectors; // 14
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unsigned char FATCount; // 16
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unsigned short RootEntries, Sectors; // 17
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unsigned char Media; // 21
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unsigned short FATSectors, SectorsPerTrack, Heads; // 22
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unsigned long HiddenSectors, SectorsHuge; // 28
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unsigned long FATSectors32; // 36
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unsigned short ExtFlag; // 40
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unsigned short FSVersion; // 42
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unsigned long RootCluster; // 44
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unsigned short FSInfoSector; // 48
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unsigned short BootBackup; // 50
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unsigned char Res3[12]; // 52
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unsigned char Drive; // 64
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unsigned char Res4; // 65
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unsigned char ExtBootSignature; // 66
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unsigned long VolumeID; // 67
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unsigned char VolumeLabel[11], SysType[8]; // 71
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unsigned char Res2[420]; // 90
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unsigned short Signature1; // 510
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};
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struct _BootSectorFatX
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{
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unsigned char SysType[4]; // 0
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unsigned long VolumeID; // 4
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unsigned long SectorsPerCluster; // 8
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unsigned short FATCount; // 12
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unsigned long Unknown; // 14
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unsigned char Unused[4078]; // 18
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};
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struct _FsInfoSector
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{
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unsigned long ExtBootSignature2; // 0
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unsigned char Res6[480]; // 4
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unsigned long FSINFOSignature; // 484
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unsigned long FreeCluster; // 488
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unsigned long NextCluster; // 492
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unsigned char Res7[12]; // 496
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unsigned long Signatur2; // 508
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};
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typedef struct _BootSector BootSector;
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struct _FATDirEntry
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{
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union
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{
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struct { unsigned char Filename[8], Ext[3]; };
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unsigned char ShortName[11];
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};
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unsigned char Attrib;
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unsigned char lCase;
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unsigned char CreationTimeMs;
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unsigned short CreationTime,CreationDate,AccessDate;
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union
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{
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unsigned short FirstClusterHigh; // FAT32
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unsigned short ExtendedAttributes; // FAT12/FAT16
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};
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unsigned short UpdateTime; //time create/update
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unsigned short UpdateDate; //date create/update
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unsigned short FirstCluster;
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unsigned long FileSize;
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};
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#define FAT_EAFILE "EA DATA. SF"
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typedef struct _EAFileHeader FAT_EA_FILE_HEADER, *PFAT_EA_FILE_HEADER;
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struct _EAFileHeader
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{
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unsigned short Signature; // ED
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unsigned short Unknown[15];
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unsigned short EASetTable[240];
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};
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typedef struct _EASetHeader FAT_EA_SET_HEADER, *PFAT_EA_SET_HEADER;
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struct _EASetHeader
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{
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unsigned short Signature; // EA
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unsigned short Offset; // relative offset, same value as in the EASetTable
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unsigned short Unknown1[2];
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char TargetFileName[12];
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unsigned short Unknown2[3];
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unsigned int EALength;
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// EA Header
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};
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typedef struct _EAHeader FAT_EA_HEADER, *PFAT_EA_HEADER;
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struct _EAHeader
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{
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unsigned char Unknown;
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unsigned char EANameLength;
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unsigned short EAValueLength;
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// Name Data
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// Value Data
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};
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typedef struct _FATDirEntry FAT_DIR_ENTRY, *PFAT_DIR_ENTRY;
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struct _FATXDirEntry
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{
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unsigned char FilenameLength; // 0
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unsigned char Attrib; // 1
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unsigned char Filename[42]; // 2
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unsigned long FirstCluster; // 44
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unsigned long FileSize; // 48
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unsigned short UpdateTime; // 52
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unsigned short UpdateDate; // 54
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unsigned short CreationTime; // 56
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unsigned short CreationDate; // 58
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unsigned short AccessTime; // 60
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unsigned short AccessDate; // 62
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};
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struct _slot
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{
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unsigned char id; // sequence number for slot
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WCHAR name0_4[5]; // first 5 characters in name
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unsigned char attr; // attribute byte
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unsigned char reserved; // always 0
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unsigned char alias_checksum; // checksum for 8.3 alias
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WCHAR name5_10[6]; // 6 more characters in name
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unsigned char start[2]; // starting cluster number
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WCHAR name11_12[2]; // last 2 characters in name
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};
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typedef struct _slot slot;
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#include <poppack.h>
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#include <fat.h>
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/* File system types */
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#define FAT16 (1)
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298
reactos/drivers/filesystems/fastfat_new/fat.h
Normal file
298
reactos/drivers/filesystems/fastfat_new/fat.h
Normal file
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@ -0,0 +1,298 @@
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#ifndef __FAT_H__
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#define __FAT_H__
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//
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// Might be a good idea to have this as a shared
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// header with FS Recognizer.
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//
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//
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// Conversion types and macros taken from internal ntifs headers
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//
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typedef union _UCHAR1
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{
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UCHAR Uchar[1];
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UCHAR ForceAlignment;
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} UCHAR1, *PUCHAR1;
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typedef union _UCHAR2
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{
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UCHAR Uchar[2];
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USHORT ForceAlignment;
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} UCHAR2, *PUCHAR2;
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typedef union _UCHAR4
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{
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UCHAR Uchar[4];
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ULONG ForceAlignment;
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} UCHAR4, *PUCHAR4;
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#define CopyUchar1(Dst,Src) { \
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*((UCHAR1 *)(Dst)) = *((UNALIGNED UCHAR1 *)(Src)); \
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}
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#define CopyUchar2(Dst,Src) { \
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*((UCHAR2 *)(Dst)) = *((UNALIGNED UCHAR2 *)(Src)); \
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}
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#define CopyUchar4(Dst,Src) { \
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*((UCHAR4 *)(Dst)) = *((UNALIGNED UCHAR4 *)(Src)); \
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}
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#define FatUnpackBios(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)->Fats, &(Pbios)->Fats[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)->SectorsPerFat, &(Pbios)->SectorsPerFat[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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CopyUchar4(&(Bios)->LargeSectors, &(Pbios)->LargeSectors[0] ); \
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CopyUchar4(&(Bios)->LargeSectorsPerFat,&((PPACKED_BIOS_PARAMETER_BLOCK_EX)Pbios)->LargeSectorsPerFat[0] ); \
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CopyUchar2(&(Bios)->ExtendedFlags, &((PPACKED_BIOS_PARAMETER_BLOCK_EX)Pbios)->ExtendedFlags[0] ); \
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CopyUchar2(&(Bios)->FsVersion, &((PPACKED_BIOS_PARAMETER_BLOCK_EX)Pbios)->FsVersion[0] ); \
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CopyUchar4(&(Bios)->RootDirFirstCluster, \
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&((PPACKED_BIOS_PARAMETER_BLOCK_EX)Pbios)->RootDirFirstCluster[0] ); \
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CopyUchar2(&(Bios)->FsInfoSector, &((PPACKED_BIOS_PARAMETER_BLOCK_EX)Pbios)->FsInfoSector[0] ); \
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CopyUchar2(&(Bios)->BackupBootSector, &((PPACKED_BIOS_PARAMETER_BLOCK_EX)Pbios)->BackupBootSector[0] ); \
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}
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//
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// Packed versions of the BPB and Boot Sector
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//
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typedef struct _PACKED_BIOS_PARAMETER_BLOCK
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{
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UCHAR BytesPerSector[2];
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UCHAR SectorsPerCluster[1];
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UCHAR ReservedSectors[2];
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UCHAR Fats[1];
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UCHAR RootEntries[2];
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UCHAR Sectors[2];
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UCHAR Media[1];
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UCHAR SectorsPerFat[2];
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UCHAR SectorsPerTrack[2];
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UCHAR Heads[2];
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UCHAR HiddenSectors[4];
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UCHAR LargeSectors[4];
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} PACKED_BIOS_PARAMETER_BLOCK, *PPACKED_BIOS_PARAMETER_BLOCK;
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// sizeof = 0x019
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typedef struct _PACKED_BIOS_PARAMETER_BLOCK_EX
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{
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PACKED_BIOS_PARAMETER_BLOCK Block;
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UCHAR LargeSectorsPerFat[4];
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UCHAR ExtendedFlags[2];
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UCHAR FsVersion[2];
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UCHAR RootDirFirstCluster[4];
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UCHAR FsInfoSector[2];
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UCHAR BackupBootSector[2];
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UCHAR Reserved[12];
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} PACKED_BIOS_PARAMETER_BLOCK_EX, *PPACKED_BIOS_PARAMETER_BLOCK_EX;
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// sizeof = 0x035 53
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//
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// Unpacked version of the BPB
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//
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typedef struct BIOS_PARAMETER_BLOCK
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{
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USHORT BytesPerSector;
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UCHAR SectorsPerCluster;
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USHORT ReservedSectors;
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UCHAR Fats;
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USHORT RootEntries;
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USHORT Sectors;
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UCHAR Media;
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USHORT SectorsPerFat;
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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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ULONG LargeSectorsPerFat;
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union
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{
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USHORT ExtendedFlags;
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struct
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{
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ULONG ActiveFat:4;
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ULONG Reserved0:3;
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ULONG MirrorDisabled:1;
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ULONG Reserved1:8;
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};
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};
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USHORT FsVersion;
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ULONG RootDirFirstCluster;
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USHORT FsInfoSector;
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USHORT BackupBootSector;
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} BIOS_PARAMETER_BLOCK, *PBIOS_PARAMETER_BLOCK;
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#define FatValidBytesPerSector(xBytes) \
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(!((xBytes) & ((xBytes)-1)) && (xBytes)>=0x80 && (xBytes)<=0x1000)
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#define FatValidSectorsPerCluster(xSectors) \
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(!((xSectors) & ((xSectors)-1)) && (xSectors)>=0 && (xSectors)<=0x80)
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typedef struct _PACKED_BOOT_SECTOR
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{
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UCHAR Jump[3];
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UCHAR Oem[8];
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PACKED_BIOS_PARAMETER_BLOCK PackedBpb;
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UCHAR PhysicalDriveNumber;
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UCHAR CurrentHead;
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UCHAR Signature;
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UCHAR Id[4];
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UCHAR VolumeLabel[11];
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UCHAR SystemId[8];
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} PACKED_BOOT_SECTOR, *PPACKED_BOOT_SECTOR;
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// sizeof = 0x03E
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typedef struct _PACKED_BOOT_SECTOR_EX
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{
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UCHAR Jump[3];
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UCHAR Oem[8];
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PACKED_BIOS_PARAMETER_BLOCK_EX PackedBpb;
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UCHAR PhysicalDriveNumber;
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UCHAR CurrentHead;
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UCHAR Signature;
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UCHAR Id[4];
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UCHAR VolumeLabel[11];
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UCHAR SystemId[8];
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} PACKED_BOOT_SECTOR_EX, *PPACKED_BOOT_SECTOR_EX;
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// sizeof = 0x060
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#define FatBootSectorJumpValid(xMagic) \
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((xMagic)[0] == 0xe9 || (xMagic)[0] == 0xeb || (xMagic)[0] == 0x49)
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typedef struct _FSINFO_SECTOR
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{
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ULONG SectorBeginSignature;
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UCHAR Reserved[480];
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ULONG FsInfoSignature;
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ULONG FreeClusterCount;
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ULONG NextFreeCluster;
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UCHAR Reserved0[12];
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ULONG SectorEndSignature;
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} FSINFO_SECTOR, *PFSINFO_SECTOR;
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// sizeof = 0x200
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#define FSINFO_SECTOR_BEGIN_SIGNATURE 0x41615252
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#define FSINFO_SECTOR_END_SIGNATURE 0xaa550000
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#define FSINFO_SIGNATURE 0x61417272
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//
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// Cluster Markers:
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//
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//
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#define FAT_CLUSTER_AVAILABLE 0x00000000
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#define FAT_CLUSTER_RESERVED 0x0ffffff0
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#define FAT_CLUSTER_BAD 0x0ffffff7
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#define FAT_CLUSTER_LAST 0x0fffffff
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//
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// Directory Structure:
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//
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typedef struct _FAT_TIME
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{
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union {
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struct {
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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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};
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USHORT Value;
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};
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} FAT_TIME, *PFAT_TIME;
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//
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//
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//
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typedef struct _FAT_DATE {
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union {
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struct {
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USHORT Day : 5;
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USHORT Month : 4;
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/* Relative to 1980 */
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USHORT Year : 7;
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};
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USHORT Value;
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};
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} FAT_DATE, *PFAT_DATE;
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//
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//
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//
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typedef struct _FAT_DATETIME {
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union {
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struct {
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FAT_TIME Time;
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FAT_DATE Date;
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};
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ULONG Value;
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};
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} FAT_DATETIME, *PFAT_DATETIME;
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//
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//
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//
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typedef struct _DIR_ENTRY
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{
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UCHAR FileName[11];
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UCHAR Attributes;
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UCHAR Case;
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UCHAR CreationTimeTenMs;
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FAT_DATETIME CreationDateTime;
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FAT_DATE LastAccessDate;
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union {
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USHORT ExtendedAttributes;
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USHORT FirstClusterOfFileHi;
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};
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FAT_DATETIME LastWriteDateTime;
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USHORT FirstCluster;
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ULONG FileSize;
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} DIR_ENTRY, *PDIR_ENTRY;
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// sizeof = 0x020
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typedef struct _LONG_FILE_NAME_ENTRY {
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UCHAR Index;
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UCHAR NameA[10];
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UCHAR Attributes;
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UCHAR Type;
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UCHAR Checksum;
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USHORT NameB[6];
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USHORT Reserved;
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USHORT NameC[2];
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} LONG_FILE_NAME_ENTRY, *PLONG_FILE_NAME_ENTRY;
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// sizeof = 0x020
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#define FAT_FN_DIR_ENTRY_TERM_INDEX 0x40
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#define FAT_BYTES_PER_DIRENT 0x20
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#define FAT_BYTES_PER_DIRENT_LOG 0x05
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#define FAT_DIRENT_NEVER_USED 0x00
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#define FAT_DIRENT_REALLY_0E5 0x05
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#define FAT_DIRENT_DIRECTORY_ALIAS 0x2e
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#define FAT_DIRENT_DELETED 0xe5
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#define FAT_CASE_LOWER_BASE 0x08
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#define FAT_CASE_LOWER_EXT 0x10
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#define FAT_DIRENT_ATTR_READ_ONLY 0x01
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#define FAT_DIRENT_ATTR_HIDDEN 0x02
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#define FAT_DIRENT_ATTR_SYSTEM 0x04
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#define FAT_DIRENT_ATTR_VOLUME_ID 0x08
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#define FAT_DIRENT_ATTR_DIRECTORY 0x10
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#define FAT_DIRENT_ATTR_ARCHIVE 0x20
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#define FAT_DIRENT_ATTR_DEVICE 0x40
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#define FAT_DIRENT_ATTR_LFN (FAT_DIRENT_ATTR_READ_ONLY | \
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FAT_DIRENT_ATTR_HIDDEN | \
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FAT_DIRENT_ATTR_SYSTEM | \
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FAT_DIRENT_ATTR_VOLUME_ID)
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typedef struct _PACKED_LFN_DIRENT {
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UCHAR Ordinal; // offset = 0
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UCHAR Name1[10]; // offset = 1 (Really 5 chars, but not WCHAR aligned)
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UCHAR Attributes; // offset = 11
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UCHAR Type; // offset = 12
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UCHAR Checksum; // offset = 13
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WCHAR Name2[6]; // offset = 14
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USHORT MustBeZero; // offset = 26
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WCHAR Name3[2]; // offset = 28
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} PACKED_LFN_DIRENT; // sizeof = 32
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#endif//__FAT_H__
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