Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 1 | #ifndef MTOOLS_FSP_H |
| 2 | #define MTOOLS_FSP_H |
| 3 | |
| 4 | /* Copyright 1996-1999,2001-2003,2008,2009 Alain Knaff. |
| 5 | * This file is part of mtools. |
| 6 | * |
| 7 | * Mtools is free software: you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation, either version 3 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * Mtools is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with Mtools. If not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | #include "stream.h" |
| 21 | #include "msdos.h" |
| 22 | #include "fs.h" |
| 23 | |
| 24 | typedef enum fatAccessMode_t { |
| 25 | FAT_ACCESS_READ, |
| 26 | FAT_ACCESS_WRITE |
| 27 | } fatAccessMode_t; |
| 28 | |
| 29 | typedef struct Fs_t { |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 30 | struct Stream_t head; |
| 31 | |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 32 | int serialized; |
| 33 | unsigned long serial_number; |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 34 | uint8_t cluster_size; |
| 35 | uint16_t sector_size; |
| 36 | |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 37 | int fat_error; |
| 38 | |
| 39 | unsigned int (*fat_decode)(struct Fs_t *This, unsigned int num); |
| 40 | void (*fat_encode)(struct Fs_t *This, unsigned int num, |
| 41 | unsigned int code); |
| 42 | |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 43 | int fat_dirty; |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 44 | uint16_t fat_start; |
| 45 | uint32_t fat_len; |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 46 | |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 47 | uint8_t num_fat; |
| 48 | uint32_t end_fat; |
| 49 | uint32_t last_fat; |
| 50 | unsigned int fat_bits; /* When it ends up here, all negative |
| 51 | special values have been |
| 52 | eliminated */ |
| 53 | |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 54 | struct FatMap_t *FatMap; |
| 55 | |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 56 | uint32_t dir_start; |
| 57 | uint16_t dir_len; |
| 58 | uint32_t clus_start; |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 59 | |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 60 | uint32_t num_clus; |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 61 | char drive; /* for error messages */ |
| 62 | |
| 63 | /* fat 32 */ |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 64 | uint32_t primaryFat; |
| 65 | uint32_t writeAllFats; |
| 66 | uint32_t rootCluster; |
| 67 | uint32_t infoSectorLoc; |
| 68 | uint16_t backupBoot; |
| 69 | uint32_t last; /* last sector allocated, or MAX32 if unknown */ |
| 70 | uint32_t freeSpace; /* free space, or MAX32 if unknown */ |
| 71 | unsigned int preallocatedClusters; |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 72 | |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 73 | uint32_t lastFatSectorNr; |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 74 | unsigned char *lastFatSectorData; |
| 75 | fatAccessMode_t lastFatAccessMode; |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 76 | unsigned int sectorMask; |
| 77 | unsigned int sectorShift; |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 78 | |
| 79 | doscp_t *cp; |
| 80 | } Fs_t; |
| 81 | |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 82 | #ifndef abs |
| 83 | #define abs(x) ((unsigned int)((x)>0?(x):-(x))) |
| 84 | #endif |
| 85 | |
| 86 | mt_off_t sectorsToBytes(Fs_t *This, uint32_t off); |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 87 | int fs_free(Stream_t *Stream); |
| 88 | |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 89 | void set_fat(Fs_t *This); |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 90 | unsigned int get_next_free_cluster(Fs_t *Fs, unsigned int last); |
| 91 | unsigned int fatDecode(Fs_t *This, unsigned int pos); |
| 92 | void fatAppend(Fs_t *This, unsigned int pos, unsigned int newpos); |
| 93 | void fatDeallocate(Fs_t *This, unsigned int pos); |
| 94 | void fatAllocate(Fs_t *This, unsigned int pos, unsigned int value); |
| 95 | void fatEncode(Fs_t *This, unsigned int pos, unsigned int value); |
| 96 | |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 97 | int fat_read(Fs_t *This, union bootsector *boot, int nodups); |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 98 | void fat_write(Fs_t *This); |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 99 | int zero_fat(Fs_t *Fs, uint8_t media_descriptor); |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 100 | extern Class_t FsClass; |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 101 | int fsPreallocateClusters(Fs_t *Fs, uint32_t); |
| 102 | void fsReleasePreallocateClusters(Fs_t *Fs, uint32_t); |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 103 | Fs_t *getFs(Stream_t *Stream); |
| 104 | |
Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 105 | int calc_fs_parameters(struct device *dev, bool fat32, uint32_t tot_sectors, |
| 106 | struct Fs_t *Fs, uint8_t *descr); |
| 107 | |
| 108 | /* Fs_t *makeFsForFormat(void); */ |
| 109 | void initFsForFormat(Fs_t *Fs); |
| 110 | void setFsSectorSize(Fs_t *Fs, struct device *dev, uint16_t msize); |
| 111 | |
| 112 | uint32_t parseFsParams( Fs_t *This, |
| 113 | union bootsector *boot, |
| 114 | int media, |
| 115 | unsigned int cylinder_size); |
| 116 | uint32_t calc_clus_start(Fs_t *Fs); |
| 117 | int calc_num_clus(Fs_t *Fs, uint32_t tot_sectors); |
Alistair Delva | beaee83 | 2021-02-24 11:27:23 -0800 | [diff] [blame] | 118 | |
| 119 | #endif |