mirror of https://github.com/ventoy/Ventoy
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
181 lines
5.8 KiB
C
181 lines
5.8 KiB
C
/*
|
|
exfatfs.h (29.08.09)
|
|
Definitions of structures and constants used in exFAT file system.
|
|
|
|
Free exFAT implementation.
|
|
Copyright (C) 2010-2018 Andrew Nayenko
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along
|
|
with this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef EXFATFS_H_INCLUDED
|
|
#define EXFATFS_H_INCLUDED
|
|
|
|
#include "byteorder.h"
|
|
#include "compiler.h"
|
|
|
|
typedef uint32_t cluster_t; /* cluster number */
|
|
|
|
#define EXFAT_FIRST_DATA_CLUSTER 2
|
|
#define EXFAT_LAST_DATA_CLUSTER 0xfffffff6
|
|
|
|
#define EXFAT_CLUSTER_FREE 0 /* free cluster */
|
|
#define EXFAT_CLUSTER_BAD 0xfffffff7 /* cluster contains bad sector */
|
|
#define EXFAT_CLUSTER_END 0xffffffff /* final cluster of file or directory */
|
|
|
|
#define EXFAT_STATE_MOUNTED 2
|
|
|
|
struct exfat_super_block
|
|
{
|
|
uint8_t jump[3]; /* 0x00 jmp and nop instructions */
|
|
uint8_t oem_name[8]; /* 0x03 "EXFAT " */
|
|
uint8_t __unused1[53]; /* 0x0B always 0 */
|
|
le64_t sector_start; /* 0x40 partition first sector */
|
|
le64_t sector_count; /* 0x48 partition sectors count */
|
|
le32_t fat_sector_start; /* 0x50 FAT first sector */
|
|
le32_t fat_sector_count; /* 0x54 FAT sectors count */
|
|
le32_t cluster_sector_start; /* 0x58 first cluster sector */
|
|
le32_t cluster_count; /* 0x5C total clusters count */
|
|
le32_t rootdir_cluster; /* 0x60 first cluster of the root dir */
|
|
le32_t volume_serial; /* 0x64 volume serial number */
|
|
struct /* 0x68 FS version */
|
|
{
|
|
uint8_t minor;
|
|
uint8_t major;
|
|
}
|
|
version;
|
|
le16_t volume_state; /* 0x6A volume state flags */
|
|
uint8_t sector_bits; /* 0x6C sector size as (1 << n) */
|
|
uint8_t spc_bits; /* 0x6D sectors per cluster as (1 << n) */
|
|
uint8_t fat_count; /* 0x6E always 1 */
|
|
uint8_t drive_no; /* 0x6F always 0x80 */
|
|
uint8_t allocated_percent; /* 0x70 percentage of allocated space */
|
|
uint8_t __unused2[397]; /* 0x71 always 0 */
|
|
le16_t boot_signature; /* the value of 0xAA55 */
|
|
}
|
|
PACKED;
|
|
STATIC_ASSERT(sizeof(struct exfat_super_block) == 512);
|
|
|
|
#define EXFAT_ENTRY_VALID 0x80
|
|
#define EXFAT_ENTRY_CONTINUED 0x40
|
|
#define EXFAT_ENTRY_OPTIONAL 0x20
|
|
|
|
#define EXFAT_ENTRY_BITMAP (0x01 | EXFAT_ENTRY_VALID)
|
|
#define EXFAT_ENTRY_UPCASE (0x02 | EXFAT_ENTRY_VALID)
|
|
#define EXFAT_ENTRY_LABEL (0x03 | EXFAT_ENTRY_VALID)
|
|
#define EXFAT_ENTRY_FILE (0x05 | EXFAT_ENTRY_VALID)
|
|
#define EXFAT_ENTRY_FILE_INFO (0x00 | EXFAT_ENTRY_VALID | EXFAT_ENTRY_CONTINUED)
|
|
#define EXFAT_ENTRY_FILE_NAME (0x01 | EXFAT_ENTRY_VALID | EXFAT_ENTRY_CONTINUED)
|
|
#define EXFAT_ENTRY_FILE_TAIL (0x00 | EXFAT_ENTRY_VALID \
|
|
| EXFAT_ENTRY_CONTINUED \
|
|
| EXFAT_ENTRY_OPTIONAL)
|
|
|
|
struct exfat_entry /* common container for all entries */
|
|
{
|
|
uint8_t type; /* any of EXFAT_ENTRY_xxx */
|
|
uint8_t data[31];
|
|
}
|
|
PACKED;
|
|
STATIC_ASSERT(sizeof(struct exfat_entry) == 32);
|
|
|
|
#define EXFAT_ENAME_MAX 15
|
|
|
|
struct exfat_entry_bitmap /* allocated clusters bitmap */
|
|
{
|
|
uint8_t type; /* EXFAT_ENTRY_BITMAP */
|
|
uint8_t __unknown1[19];
|
|
le32_t start_cluster;
|
|
le64_t size; /* in bytes */
|
|
}
|
|
PACKED;
|
|
STATIC_ASSERT(sizeof(struct exfat_entry_bitmap) == 32);
|
|
|
|
#define EXFAT_UPCASE_CHARS 0x10000
|
|
|
|
struct exfat_entry_upcase /* upper case translation table */
|
|
{
|
|
uint8_t type; /* EXFAT_ENTRY_UPCASE */
|
|
uint8_t __unknown1[3];
|
|
le32_t checksum;
|
|
uint8_t __unknown2[12];
|
|
le32_t start_cluster;
|
|
le64_t size; /* in bytes */
|
|
}
|
|
PACKED;
|
|
STATIC_ASSERT(sizeof(struct exfat_entry_upcase) == 32);
|
|
|
|
struct exfat_entry_label /* volume label */
|
|
{
|
|
uint8_t type; /* EXFAT_ENTRY_LABEL */
|
|
uint8_t length; /* number of characters */
|
|
le16_t name[EXFAT_ENAME_MAX]; /* in UTF-16LE */
|
|
}
|
|
PACKED;
|
|
STATIC_ASSERT(sizeof(struct exfat_entry_label) == 32);
|
|
|
|
#define EXFAT_ATTRIB_RO 0x01
|
|
#define EXFAT_ATTRIB_HIDDEN 0x02
|
|
#define EXFAT_ATTRIB_SYSTEM 0x04
|
|
#define EXFAT_ATTRIB_VOLUME 0x08
|
|
#define EXFAT_ATTRIB_DIR 0x10
|
|
#define EXFAT_ATTRIB_ARCH 0x20
|
|
|
|
struct exfat_entry_meta1 /* file or directory info (part 1) */
|
|
{
|
|
uint8_t type; /* EXFAT_ENTRY_FILE */
|
|
uint8_t continuations;
|
|
le16_t checksum;
|
|
le16_t attrib; /* combination of EXFAT_ATTRIB_xxx */
|
|
le16_t __unknown1;
|
|
le16_t crtime, crdate; /* creation date and time */
|
|
le16_t mtime, mdate; /* latest modification date and time */
|
|
le16_t atime, adate; /* latest access date and time */
|
|
uint8_t crtime_cs; /* creation time in cs (centiseconds) */
|
|
uint8_t mtime_cs; /* latest modification time in cs */
|
|
uint8_t __unknown2[10];
|
|
}
|
|
PACKED;
|
|
STATIC_ASSERT(sizeof(struct exfat_entry_meta1) == 32);
|
|
|
|
#define EXFAT_FLAG_ALWAYS1 (1u << 0)
|
|
#define EXFAT_FLAG_CONTIGUOUS (1u << 1)
|
|
|
|
struct exfat_entry_meta2 /* file or directory info (part 2) */
|
|
{
|
|
uint8_t type; /* EXFAT_ENTRY_FILE_INFO */
|
|
uint8_t flags; /* combination of EXFAT_FLAG_xxx */
|
|
uint8_t __unknown1;
|
|
uint8_t name_length;
|
|
le16_t name_hash;
|
|
le16_t __unknown2;
|
|
le64_t valid_size; /* in bytes, less or equal to size */
|
|
uint8_t __unknown3[4];
|
|
le32_t start_cluster;
|
|
le64_t size; /* in bytes */
|
|
}
|
|
PACKED;
|
|
STATIC_ASSERT(sizeof(struct exfat_entry_meta2) == 32);
|
|
|
|
struct exfat_entry_name /* file or directory name */
|
|
{
|
|
uint8_t type; /* EXFAT_ENTRY_FILE_NAME */
|
|
uint8_t __unknown;
|
|
le16_t name[EXFAT_ENAME_MAX]; /* in UTF-16LE */
|
|
}
|
|
PACKED;
|
|
STATIC_ASSERT(sizeof(struct exfat_entry_name) == 32);
|
|
|
|
#endif /* ifndef EXFATFS_H_INCLUDED */
|