1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2019 Namjae Jeon <linkinjeon@kernel.org> 4 */ 5 6 #ifndef _LIBEXFAT_H 7 8 #include <stdbool.h> 9 #include <sys/types.h> 10 #include <wchar.h> 11 #include <limits.h> 12 13 #define KB (1024) 14 #define MB (1024*1024) 15 #define GB (1024UL*1024UL*1024UL) 16 17 #define __round_mask(x, y) ((__typeof__(x))((y)-1)) 18 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) 19 #define round_down(x, y) ((x) & ~__round_mask(x, y)) 20 21 #define MIN(a, b) ((a) < (b) ? (a) : (b)) 22 #define MAX(a, b) ((a) > (b) ? (a) : (b)) 23 24 #define DIV_ROUND_UP(__i, __d) (((__i) + (__d) - 1) / (__d)) 25 26 #define EXFAT_MIN_NUM_SEC_VOL (2048) 27 #define EXFAT_MAX_NUM_SEC_VOL ((2 << 64) - 1) 28 29 #define EXFAT_MAX_NUM_CLUSTER (0xFFFFFFF5) 30 31 #define DEFAULT_BOUNDARY_ALIGNMENT (1024*1024) 32 33 #define DEFAULT_SECTOR_SIZE (512) 34 35 #define VOLUME_LABEL_BUFFER_SIZE (VOLUME_LABEL_MAX_LEN*MB_LEN_MAX+1) 36 37 /* Upcase table macro */ 38 #define EXFAT_UPCASE_TABLE_SIZE (5836) 39 40 /* Flags for tune.exfat and exfatlabel */ 41 #define EXFAT_GET_VOLUME_LABEL 0x01 42 #define EXFAT_SET_VOLUME_LABEL 0x02 43 #define EXFAT_GET_VOLUME_SERIAL 0x03 44 #define EXFAT_SET_VOLUME_SERIAL 0x04 45 46 #define EXFAT_MAX_SECTOR_SIZE 4096 47 48 enum { 49 BOOT_SEC_IDX = 0, 50 EXBOOT_SEC_IDX, 51 EXBOOT_SEC_NUM = 8, 52 OEM_SEC_IDX, 53 RESERVED_SEC_IDX, 54 CHECKSUM_SEC_IDX, 55 BACKUP_BOOT_SEC_IDX, 56 }; 57 58 struct exfat_blk_dev { 59 int dev_fd; 60 unsigned long long offset; 61 unsigned long long size; 62 unsigned int sector_size; 63 unsigned int sector_size_bits; 64 unsigned long long num_sectors; 65 unsigned int num_clusters; 66 unsigned int cluster_size; 67 }; 68 69 struct exfat_user_input { 70 char dev_name[255]; 71 bool writeable; 72 unsigned int cluster_size; 73 unsigned int sec_per_clu; 74 unsigned int boundary_align; 75 bool pack_bitmap; 76 bool quick; 77 __u16 volume_label[VOLUME_LABEL_MAX_LEN]; 78 int volume_label_len; 79 unsigned int volume_serial; 80 }; 81 82 void show_version(void); 83 84 void exfat_set_bit(struct exfat_blk_dev *bd, char *bitmap, 85 unsigned int clu); 86 void exfat_clear_bit(struct exfat_blk_dev *bd, char *bitmap, 87 unsigned int clu); 88 wchar_t exfat_bad_char(wchar_t w); 89 void boot_calc_checksum(unsigned char *sector, unsigned short size, 90 bool is_boot_sec, __le32 *checksum); 91 void init_user_input(struct exfat_user_input *ui); 92 int exfat_get_blk_dev_info(struct exfat_user_input *ui, 93 struct exfat_blk_dev *bd); 94 ssize_t exfat_read(int fd, void *buf, size_t size, off_t offset); 95 ssize_t exfat_write(int fd, void *buf, size_t size, off_t offset); 96 97 size_t exfat_utf16_len(const __le16 *str, size_t max_size); 98 ssize_t exfat_utf16_enc(const char *in_str, __u16 *out_str, size_t out_size); 99 ssize_t exfat_utf16_dec(const __u16 *in_str, size_t in_len, 100 char *out_str, size_t out_size); 101 off_t exfat_get_root_entry_offset(struct exfat_blk_dev *bd); 102 int exfat_show_volume_label(struct exfat_blk_dev *bd, off_t root_clu_off); 103 int exfat_set_volume_label(struct exfat_blk_dev *bd, 104 char *label_input, off_t root_clu_off); 105 int exfat_read_sector(struct exfat_blk_dev *bd, void *buf, 106 unsigned int sec_off); 107 int exfat_write_sector(struct exfat_blk_dev *bd, void *buf, 108 unsigned int sec_off); 109 int exfat_write_checksum_sector(struct exfat_blk_dev *bd, 110 unsigned int checksum, bool is_backup); 111 char *exfat_conv_volume_label(struct exfat_dentry *vol_entry); 112 int exfat_show_volume_serial(int fd); 113 int exfat_set_volume_serial(struct exfat_blk_dev *bd, 114 struct exfat_user_input *ui); 115 unsigned int exfat_clus_to_blk_dev_off(struct exfat_blk_dev *bd, 116 unsigned int clu_off, unsigned int clu); 117 118 119 /* 120 * Exfat Print 121 */ 122 123 extern unsigned int print_level; 124 125 #define EXFAT_ERROR (1) 126 #define EXFAT_INFO (2) 127 #define EXFAT_DEBUG (3) 128 129 #define exfat_msg(level, dir, fmt, ...) \ 130 do { \ 131 if (print_level >= level) { \ 132 fprintf(dir, fmt, ##__VA_ARGS__); \ 133 } \ 134 } while (0) \ 135 136 #define exfat_err(fmt, ...) exfat_msg(EXFAT_ERROR, stderr, \ 137 fmt, ##__VA_ARGS__) 138 #define exfat_info(fmt, ...) exfat_msg(EXFAT_INFO, stdout, \ 139 fmt, ##__VA_ARGS__) 140 #define exfat_debug(fmt, ...) exfat_msg(EXFAT_DEBUG, stdout, \ 141 "[%s:%4d] " fmt, __func__, \ 142 __LINE__, ##__VA_ARGS__) 143 144 #endif /* !_LIBEXFAT_H */ 145