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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
*/
#ifndef _EXFAT_H
#define _EXFAT_H
#include <linux/types.h>
#include <linux/buffer_head.h>
#ifdef CONFIG_EXFAT_KERNEL_DEBUG
/* For Debugging Purpose */
/* IOCTL code 'f' used by
* - file systems typically #0~0x1F
* - embedded terminal devices #128~
* - exts for debugging purpose #99
* number 100 and 101 is available now but has possible conflicts
*/
#define EXFAT_IOC_GET_DEBUGFLAGS _IOR('f', 100, long)
#define EXFAT_IOC_SET_DEBUGFLAGS _IOW('f', 101, long)
#define EXFAT_DEBUGFLAGS_INVALID_UMOUNT 0x01
#define EXFAT_DEBUGFLAGS_ERROR_RW 0x02
#endif /* CONFIG_EXFAT_KERNEL_DEBUG */
#ifdef CONFIG_EXFAT_DEBUG_MSG
#define DEBUG 1
#else
#undef DEBUG
#endif
#define DENTRY_SIZE 32 /* dir entry size */
#define DENTRY_SIZE_BITS 5
/* PBR entries */
#define PBR_SIGNATURE 0xAA55
#define EXT_SIGNATURE 0xAA550000
#define VOL_LABEL "NO NAME " /* size should be 11 */
#define OEM_NAME "MSWIN4.1" /* size should be 8 */
#define STR_FAT12 "FAT12 " /* size should be 8 */
#define STR_FAT16 "FAT16 " /* size should be 8 */
#define STR_FAT32 "FAT32 " /* size should be 8 */
#define STR_EXFAT "EXFAT " /* size should be 8 */
#define VOL_CLEAN 0x0000
#define VOL_DIRTY 0x0002
/* max number of clusters */
#define FAT12_THRESHOLD 4087 /* 2^12 - 1 + 2 (clu 0 & 1) */
#define FAT16_THRESHOLD 65527 /* 2^16 - 1 + 2 */
#define FAT32_THRESHOLD 268435457 /* 2^28 - 1 + 2 */
#define EXFAT_THRESHOLD 268435457 /* 2^28 - 1 + 2 */
/* file types */
#define TYPE_UNUSED 0x0000
#define TYPE_DELETED 0x0001
#define TYPE_INVALID 0x0002
#define TYPE_CRITICAL_PRI 0x0100
#define TYPE_BITMAP 0x0101
#define TYPE_UPCASE 0x0102
#define TYPE_VOLUME 0x0103
#define TYPE_DIR 0x0104
#define TYPE_FILE 0x011F
#define TYPE_SYMLINK 0x015F
#define TYPE_CRITICAL_SEC 0x0200
#define TYPE_STREAM 0x0201
#define TYPE_EXTEND 0x0202
#define TYPE_ACL 0x0203
#define TYPE_BENIGN_PRI 0x0400
#define TYPE_GUID 0x0401
#define TYPE_PADDING 0x0402
#define TYPE_ACLTAB 0x0403
#define TYPE_BENIGN_SEC 0x0800
#define TYPE_ALL 0x0FFF
/* time modes */
#define TM_CREATE 0
#define TM_MODIFY 1
#define TM_ACCESS 2
/* checksum types */
#define CS_DIR_ENTRY 0
#define CS_PBR_SECTOR 1
#define CS_DEFAULT 2
#define CLUSTER_16(x) ((u16)(x))
#define CLUSTER_32(x) ((u32)(x))
#define FALSE 0
#define TRUE 1
#define START_SECTOR(x) \
((((sector_t)((x) - 2)) << p_fs->sectors_per_clu_bits) + \
p_fs->data_start_sector)
#define IS_LAST_SECTOR_IN_CLUSTER(sec) \
((((sec) - p_fs->data_start_sector + 1) & \
((1 << p_fs->sectors_per_clu_bits) - 1)) == 0)
#define GET_CLUSTER_FROM_SECTOR(sec) \
((u32)((((sec) - p_fs->data_start_sector) >> \
p_fs->sectors_per_clu_bits) + 2))
#define GET16(p_src) \
(((u16)(p_src)[0]) | (((u16)(p_src)[1]) << 8))
#define GET32(p_src) \
(((u32)(p_src)[0]) | (((u32)(p_src)[1]) << 8) | \
(((u32)(p_src)[2]) << 16) | (((u32)(p_src)[3]) << 24))
#define GET64(p_src) \
(((u64)(p_src)[0]) | (((u64)(p_src)[1]) << 8) | \
(((u64)(p_src)[2]) << 16) | (((u64)(p_src)[3]) << 24) | \
(((u64)(p_src)[4]) << 32) | (((u64)(p_src)[5]) << 40) | \
(((u64)(p_src)[6]) << 48) | (((u64)(p_src)[7]) << 56))
#define SET16(p_dst, src) \
do { \
(p_dst)[0] = (u8)(src); \
(p_dst)[1] = (u8)(((u16)(src)) >> 8); \
} while (0)
#define SET32(p_dst, src) \
do { \
(p_dst)[0] = (u8)(src); \
(p_dst)[1] = (u8)(((u32)(src)) >> 8); \
(p_dst)[2] = (u8)(((u32)(src)) >> 16); \
(p_dst)[3] = (u8)(((u32)(src)) >> 24); \
} while (0)
#define SET64(p_dst, src) \
do { \
(p_dst)[0] = (u8)(src); \
(p_dst)[1] = (u8)(((u64)(src)) >> 8); \
(p_dst)[2] = (u8)(((u64)(src)) >> 16); \
(p_dst)[3] = (u8)(((u64)(src)) >> 24); \
(p_dst)[4] = (u8)(((u64)(src)) >> 32); \
(p_dst)[5] = (u8)(((u64)(src)) >> 40); \
(p_dst)[6] = (u8)(((u64)(src)) >> 48); \
(p_dst)[7] = (u8)(((u64)(src)) >> 56); \
} while (0)
#ifdef __LITTLE_ENDIAN
#define GET16_A(p_src) (*((u16 *)(p_src)))
#define GET32_A(p_src) (*((u32 *)(p_src)))
#define GET64_A(p_src) (*((u64 *)(p_src)))
#define SET16_A(p_dst, src) (*((u16 *)(p_dst)) = (u16)(src))
#define SET32_A(p_dst, src) (*((u32 *)(p_dst)) = (u32)(src))
#define SET64_A(p_dst, src) (*((u64 *)(p_dst)) = (u64)(src))
#else /* BIG_ENDIAN */
#define GET16_A(p_src) GET16(p_src)
#define GET32_A(p_src) GET32(p_src)
#define GET64_A(p_src) GET64(p_src)
#define SET16_A(p_dst, src) SET16(p_dst, src)
#define SET32_A(p_dst, src) SET32(p_dst, src)
#define SET64_A(p_dst, src) SET64(p_dst, src)
#endif
/* cache size (in number of sectors) */
/* (should be an exponential value of 2) */
#define FAT_CACHE_SIZE 128
#define FAT_CACHE_HASH_SIZE 64
#define BUF_CACHE_SIZE 256
#define BUF_CACHE_HASH_SIZE 64
/* Upcase table macro */
#define HIGH_INDEX_BIT (8)
#define HIGH_INDEX_MASK (0xFF00)
#define LOW_INDEX_BIT (16-HIGH_INDEX_BIT)
#define UTBL_ROW_COUNT (1<<LOW_INDEX_BIT)
#define UTBL_COL_COUNT (1<<HIGH_INDEX_BIT)
static inline u16 get_col_index(u16 i)
{
return i >> LOW_INDEX_BIT;
}
static inline u16 get_row_index(u16 i)
{
return i & ~HIGH_INDEX_MASK;
}
#define EXFAT_SUPER_MAGIC (0x2011BAB0L)
#define EXFAT_ROOT_INO 1
/* FAT types */
#define FAT12 0x01 /* FAT12 */
#define FAT16 0x0E /* Win95 FAT16 (LBA) */
#define FAT32 0x0C /* Win95 FAT32 (LBA) */
#define EXFAT 0x07 /* exFAT */
/* file name lengths */
#define MAX_CHARSET_SIZE 3 /* max size of multi-byte character */
#define MAX_PATH_DEPTH 15 /* max depth of path name */
#define MAX_NAME_LENGTH 256 /* max len of filename including NULL */
#define MAX_PATH_LENGTH 260 /* max len of pathname including NULL */
#define DOS_NAME_LENGTH 11 /* DOS filename length excluding NULL */
#define DOS_PATH_LENGTH 80 /* DOS pathname length excluding NULL */
/* file attributes */
#define ATTR_NORMAL 0x0000
#define ATTR_READONLY 0x0001
#define ATTR_HIDDEN 0x0002
#define ATTR_SYSTEM 0x0004
#define ATTR_VOLUME 0x0008
#define ATTR_SUBDIR 0x0010
#define ATTR_ARCHIVE 0x0020
#define ATTR_SYMLINK 0x0040
#define ATTR_EXTEND 0x000F
#define ATTR_RWMASK 0x007E
/* file creation modes */
#define FM_REGULAR 0x00
#define FM_SYMLINK 0x40
/* return values */
#define FFS_SUCCESS 0
#define FFS_MEDIAERR 1
#define FFS_FORMATERR 2
#define FFS_MOUNTED 3
#define FFS_NOTMOUNTED 4
#define FFS_ALIGNMENTERR 5
#define FFS_SEMAPHOREERR 6
#define FFS_INVALIDPATH 7
#define FFS_INVALIDFID 8
#define FFS_NOTFOUND 9
#define FFS_FILEEXIST 10
#define FFS_PERMISSIONERR 11
#define FFS_NOTOPENED 12
#define FFS_MAXOPENED 13
#define FFS_FULL 14
#define FFS_EOF 15
#define FFS_DIRBUSY 16
#define FFS_MEMORYERR 17
#define FFS_NAMETOOLONG 18
#define FFS_ERROR 19
#define NUM_UPCASE 2918
#define DOS_CUR_DIR_NAME ". "
#define DOS_PAR_DIR_NAME ".. "
#ifdef __LITTLE_ENDIAN
#define UNI_CUR_DIR_NAME ".\0"
#define UNI_PAR_DIR_NAME ".\0.\0"
#else
#define UNI_CUR_DIR_NAME "\0."
#define UNI_PAR_DIR_NAME "\0.\0."
#endif
struct date_time_t {
u16 Year;
u16 Month;
u16 Day;
u16 Hour;
u16 Minute;
u16 Second;
u16 MilliSecond;
};
struct part_info_t {
u32 Offset; /* start sector number of the partition */
u32 Size; /* in sectors */
};
struct dev_info_t {
u32 SecSize; /* sector size in bytes */
u32 DevSize; /* block device size in sectors */
};
struct vol_info_t {
u32 FatType;
u32 ClusterSize;
u32 NumClusters;
u32 FreeClusters;
u32 UsedClusters;
};
/* directory structure */
struct chain_t {
u32 dir;
s32 size;
u8 flags;
};
struct file_id_t {
struct chain_t dir;
s32 entry;
u32 type;
u32 attr;
u32 start_clu;
u64 size;
u8 flags;
s64 rwoffset;
s32 hint_last_off;
u32 hint_last_clu;
};
struct dir_entry_t {
char Name[MAX_NAME_LENGTH * MAX_CHARSET_SIZE];
/* used only for FAT12/16/32, not used for exFAT */
char ShortName[DOS_NAME_LENGTH + 2];
u32 Attr;
u64 Size;
u32 NumSubdirs;
struct date_time_t CreateTimestamp;
struct date_time_t ModifyTimestamp;
struct date_time_t AccessTimestamp;
};
struct timestamp_t {
u16 sec; /* 0 ~ 59 */
u16 min; /* 0 ~ 59 */
u16 hour; /* 0 ~ 23 */
u16 day; /* 1 ~ 31 */
u16 mon; /* 1 ~ 12 */
u16 year; /* 0 ~ 127 (since 1980) */
};
/* MS_DOS FAT partition boot record (512 bytes) */
struct pbr_sector_t {
u8 jmp_boot[3];
u8 oem_name[8];
u8 bpb[109];
u8
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