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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019 Namjae Jeon <linkinjeon@kernel.org>
*/
#ifndef _LIBEXFAT_H
#include <stdbool.h>
#include <sys/types.h>
#include <wchar.h>
#include <limits.h>
typedef __u32 clus_t;
#define KB (1024)
#define MB (1024*1024)
#define GB (1024UL*1024UL*1024UL)
#define __round_mask(x, y) ((__typeof__(x))((y)-1))
#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
#define round_down(x, y) ((x) & ~__round_mask(x, y))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define DIV_ROUND_UP(__i, __d) (((__i) + (__d) - 1) / (__d))
#define EXFAT_MIN_NUM_SEC_VOL (2048)
#define EXFAT_MAX_NUM_SEC_VOL ((2 << 64) - 1)
#define EXFAT_MAX_NUM_CLUSTER (0xFFFFFFF5)
#define DEFAULT_BOUNDARY_ALIGNMENT (1024*1024)
#define DEFAULT_SECTOR_SIZE (512)
#define VOLUME_LABEL_BUFFER_SIZE (VOLUME_LABEL_MAX_LEN*MB_LEN_MAX+1)
/* Upcase table macro */
#define EXFAT_UPCASE_TABLE_CHARS (0x10000)
#define EXFAT_UPCASE_TABLE_SIZE (5836)
/* Flags for tune.exfat and exfatlabel */
#define EXFAT_GET_VOLUME_LABEL 0x01
#define EXFAT_SET_VOLUME_LABEL 0x02
#define EXFAT_GET_VOLUME_SERIAL 0x03
#define EXFAT_SET_VOLUME_SERIAL 0x04
#define EXFAT_GET_VOLUME_GUID 0x05
#define EXFAT_SET_VOLUME_GUID 0x06
#define EXFAT_MAX_SECTOR_SIZE 4096
#define EXFAT_CLUSTER_SIZE(pbr) (1 << ((pbr)->bsx.sect_size_bits + \
(pbr)->bsx.sect_per_clus_bits))
#define EXFAT_SECTOR_SIZE(pbr) (1 << (pbr)->bsx.sect_size_bits)
#define EXFAT_MAX_HASH_COUNT (UINT16_MAX + 1)
enum {
BOOT_SEC_IDX = 0,
EXBOOT_SEC_IDX,
EXBOOT_SEC_NUM = 8,
OEM_SEC_IDX,
RESERVED_SEC_IDX,
CHECKSUM_SEC_IDX,
BACKUP_BOOT_SEC_IDX,
};
struct exfat_blk_dev {
int dev_fd;
unsigned long long offset;
unsigned long long size;
unsigned int sector_size;
unsigned int sector_size_bits;
unsigned long long num_sectors;
unsigned int num_clusters;
unsigned int cluster_size;
};
struct exfat_user_input {
char dev_name[255];
bool writeable;
unsigned int cluster_size;
unsigned int sec_per_clu;
unsigned int boundary_align;
bool pack_bitmap;
bool quick;
__u16 volume_label[VOLUME_LABEL_MAX_LEN];
int volume_label_len;
unsigned int volume_serial;
const char *guid;
};
struct exfat;
struct exfat_inode;
#ifdef WORDS_BIGENDIAN
typedef __u8 bitmap_t;
#else
typedef __u32 bitmap_t;
#endif
#define BITS_PER (sizeof(bitmap_t) * 8)
#define BIT_MASK(__c) (1 << ((__c) % BITS_PER))
#define BIT_ENTRY(__c) ((__c) / BITS_PER)
#define EXFAT_BITMAP_SIZE(__c_count) \
(DIV_ROUND_UP(__c_count, BITS_PER) * sizeof(bitmap_t))
#define BITMAP_GET(bmap, bit) \
(((bitmap_t *)(bmap))[BIT_ENTRY(bit)] & BIT_MASK(bit))
#define BITMAP_SET(bmap, bit) \
(((bitmap_t *)(bmap))[BIT_ENTRY(bit)] |= BIT_MASK(bit))
static inline bool exfat_bitmap_get(char *bmap, clus_t c)
{
clus_t cc = c - EXFAT_FIRST_CLUSTER;
return BITMAP_GET(bmap, cc);
}
static inline void exfat_bitmap_set(char *bmap, clus_t c)
{
clus_t cc = c - EXFAT_FIRST_CLUSTER;
BITMAP_SET(bmap, cc);
}
static inline void exfat_bitmap_clear(char *bmap, clus_t c)
{
clus_t cc = c - EXFAT_FIRST_CLUSTER;
(((bitmap_t *)(bmap))[BIT_ENTRY(cc)] &= ~BIT_MASK(cc));
}
void exfat_bitmap_set_range(struct exfat *exfat, char *bitmap,
clus_t start_clus, clus_t count);
int exfat_bitmap_find_zero(struct exfat *exfat, char *bmap,
clus_t start_clu, clus_t *next);
int exfat_bitmap_find_one(struct exfat *exfat, char *bmap,
clus_t start_clu, clus_t *next);
void show_version(void);
wchar_t exfat_bad_char(wchar_t w);
void boot_calc_checksum(unsigned char *sector, unsigned short size,
bool is_boot_sec, __le32 *checksum);
void init_user_input(struct exfat_user_input *ui);
int exfat_get_blk_dev_info(struct exfat_user_input *ui,
struct exfat_blk_dev *bd);
ssize_t exfat_read(int fd, void *buf, size_t size, off_t offset);
ssize_t exfat_write(int fd, void *buf, size_t size, off_t offset);
size_t exfat_utf16_len(const __le16 *str, size_t max_size);
ssize_t exfat_utf16_enc(const char *in_str, __u16 *out_str, size_t out_size);
ssize_t exfat_utf16_dec(const __u16 *in_str, size_t in_len,
char *out_str, size_t out_size);
off_t exfat_get_root_entry_offset(struct exfat_blk_dev *bd);
int exfat_read_volume_label(struct exfat *exfat);
int exfat_set_volume_label(struct exfat *exfat, char *label_input);
int __exfat_set_volume_guid(struct exfat_dentry *dentry, const char *guid);
int exfat_read_volume_guid(struct exfat *exfat);
int exfat_set_volume_guid(struct exfat *exfat, const char *guid);
int exfat_read_sector(struct exfat_blk_dev *bd, void *buf,
unsigned int sec_off);
int exfat_write_sector(struct exfat_blk_dev *bd, void *buf,
unsigned int sec_off);
int exfat_write_checksum_sector(struct exfat_blk_dev *bd,
unsigned int checksum, bool is_backup);
char *exfat_conv_volume_label(struct exfat_dentry *vol_entry);
int exfat_show_volume_serial(int fd);
int exfat_set_volume_serial(struct exfat_blk_dev *bd,
struct exfat_user_input *ui);
unsigned int exfat_clus_to_blk_dev_off(struct exfat_blk_dev *bd,
unsigned int clu_off, unsigned int clu);
int exfat_get_next_clus(struct exfat *exfat, clus_t clus, clus_t *next);
int exfat_get_inode_next_clus(struct exfat *exfat, struct exfat_inode *node,
clus_t clus, clus_t *next);
int exfat_set_fat(struct exfat *exfat, clus_t clus, clus_t next_clus);
off_t exfat_s2o(struct exfat *exfat, off_t sect);
off_t exfat_c2o(struct exfat *exfat, unsigned int clus);
int exfat_o2c(struct exfat *exfat, off_t device_offset,
unsigned int *clu, unsigned int *offset);
bool exfat_heap_clus(struct exfat *exfat, clus_t clus);
int exfat_root_clus_count(struct exfat *exfat);
int read_boot_sect(struct exfat_blk_dev *bdev, struct pbr **bs);
/*
* Exfat Print
*/
extern unsigned int print_level;
#define EXFAT_ERROR (1)
#define EXFAT_INFO (2)
#define EXFAT_DEBUG (3)
#define exfat_msg(level, dir, fmt, ...) \
do { \
if (print_level >= level) { \
fprintf(dir, fmt, ##__VA_ARGS__); \
} \
} while (0) \
#define exfat_err(fmt, ...) exfat_msg(EXFAT_ERROR, stderr, \
fmt, ##__VA_ARGS__)
#define exfat_info(fmt, ...) exfat_msg(EXFAT_INFO, stdout, \
fmt, ##__VA_ARGS__)
#define exfat_debug(fmt, ...) exfat_msg(EXFAT_DEBUG, stdout, \
"[%s:%4d] " fmt, __func__, \
__LINE__, ##__VA_ARGS__)
#endif /* !_LIBEXFAT_H */
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