staging: exfat: remove staging version of exfat filesystem

Now that there is a "real" solution for exfat in the vfs tree queued up
to be merged in 5.7-rc1 the "old" exfat code in staging can be removed.

Many thanks to Valdis for doing the work to get this into the tree in
the first place, it was greatly appreciated.

Acked-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Cc: Pali Rohár <pali@kernel.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Namjae Jeon <namjae.jeon@samsung.com>
Cc: Sungjong Seo <sj1557.seo@samsung.com>
Cc: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20200310105421.GA2810679@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 760 deletions

diff --git a/drivers/staging/exfat/exfat.h b/drivers/staging/exfat/exfat.h
deleted file mode 100644
index 341c9192f7e8..000000000000
--- a/drivers/staging/exfat/exfat.h
+++ /dev/null
@@ -1,760 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- *  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_STAGING_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_STAGING_EXFAT_KERNEL_DEBUG */
-
-#ifdef CONFIG_STAGING_EXFAT_DEBUG_MSG
-#define DEBUG	1
-#else
-#undef DEBUG
-#endif
-
-#define EFSCORRUPTED	EUCLEAN		/* Filesystem is corrupted */
-
-#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_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 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	BIT(LOW_INDEX_BIT)
-#define UTBL_COL_COUNT	BIT(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 */
-
-/* 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_EXTEND		0x000F
-#define ATTR_RWMASK		0x007E
-
-#define NUM_UPCASE              2918
-
-#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 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];
-	u32 attr;
-	u64 Size;
-	u32 num_subdirs;
-	struct date_time_t create_timestamp;
-	struct date_time_t modify_timestamp;
-	struct date_time_t access_timestamp;
-};
-
-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       boot_code[390];
-	u8       signature[2];
-};
-
-/* MS-DOS FAT12/16 BIOS parameter block (51 bytes) */
-struct bpb16_t {
-	u8       sector_size[2];
-	u8       sectors_per_clu;
-	u8       num_reserved[2];
-	u8       num_fats;
-	u8       num_root_entries[2];
-	u8       num_sectors[2];
-	u8       media_type;
-	u8       num_fat_sectors[2];
-	u8       sectors_in_track[2];
-	u8       num_heads[2];
-	u8       num_hid_sectors[4];
-	u8       num_huge_sectors[4];
-
-	u8       phy_drv_no;
-	u8       reserved;
-	u8       ext_signature;
-	u8       vol_serial[4];
-	u8       vol_label[11];
-	u8       vol_type[8];
-};
-
-/* MS-DOS FAT32 BIOS parameter block (79 bytes) */
-struct bpb32_t {
-	u8       sector_size[2];
-	u8       sectors_per_clu;
-	u8       num_reserved[2];
-	u8       num_fats;
-	u8       num_root_entries[2];
-	u8       num_sectors[2];
-	u8       media_type;
-	u8       num_fat_sectors[2];
-	u8       sectors_in_track[2];
-	u8       num_heads[2];
-	u8       num_hid_sectors[4];
-	u8       num_huge_sectors[4];
-	u8       num_fat32_sectors[4];
-	u8       ext_flags[2];
-	u8       fs_version[2];
-	u8       root_cluster[4];
-	u8       fsinfo_sector[2];
-	u8       backup_sector[2];
-	u8       reserved[12];
-
-	u8       phy_drv_no;
-	u8       ext_reserved;
-	u8       ext_signature;
-	u8       vol_serial[4];
-	u8       vol_label[11];
-	u8       vol_type[8];
-};
-
-/* MS-DOS EXFAT BIOS parameter block (109 bytes) */
-struct bpbex_t {
-	u8       reserved1[53];
-	u8       vol_offset[8];
-	u8       vol_length[8];
-	u8       fat_offset[4];
-	u8       fat_length[4];
-	u8       clu_offset[4];
-	u8       clu_count[4];
-	u8       root_cluster[4];
-	u8       vol_serial[4];
-	u8       fs_version[2];
-	u8       vol_flags[2];
-	u8       sector_size_bits;
-	u8       sectors_per_clu_bits;
-	u8       num_fats;
-	u8       phy_drv_no;
-	u8       perc_in_use;
-	u8       reserved2[7];
-};
-
-/* MS-DOS FAT file system information sector (512 bytes) */
-struct fsi_sector_t {
-	u8       signature1[4];
-	u8       reserved1[480];
-	u8       signature2[4];
-	u8       free_cluster[4];
-	u8       next_cluster[4];
-	u8       reserved2[14];
-	u8       signature3[2];
-};
-
-/* MS-DOS FAT directory entry (32 bytes) */
-struct dentry_t {
-	u8       dummy[32];
-};
-
-/* MS-DOS EXFAT file directory entry (32 bytes) */
-struct file_dentry_t {
-	u8       type;
-	u8       num_ext;
-	u8       checksum[2];
-	u8       attr[2];
-	u8       reserved1[2];
-	u8       create_time[2];
-	u8       create_date[2];
-	u8       modify_time[2];
-	u8       modify_date[2];
-	u8       access_time[2];
-	u8       access_date[2];
-	u8       create_time_ms;
-	u8       modify_time_ms;
-	u8       access_time_ms;
-	u8       reserved2[9];
-};
-
-/* MS-DOS EXFAT stream extension directory entry (32 bytes) */
-struct strm_dentry_t {
-	u8       type;
-	u8       flags;
-	u8       reserved1;
-	u8       name_len;
-	u8       name_hash[2];
-	u8       reserved2[2];
-	u8       valid_size[8];
-	u8       reserved3[4];
-	u8       start_clu[4];
-	u8       size[8];
-};
-
-/* MS-DOS EXFAT file name directory entry (32 bytes) */
-struct name_dentry_t {
-	u8       type;
-	u8       flags;
-	u8       unicode_0_14[30];
-};
-
-/* MS-DOS EXFAT allocation bitmap directory entry (32 bytes) */
-struct bmap_dentry_t {
-	u8       type;
-	u8       flags;
-	u8       reserved[18];
-	u8       start_clu[4];
-	u8       size[8];
-};
-
-/* MS-DOS EXFAT up-case table directory entry (32 bytes) */
-struct case_dentry_t {
-	u8       type;
-	u8       reserved1[3];
-	u8       checksum[4];
-	u8       reserved2[12];
-	u8       start_clu[4];
-	u8       size[8];
-};
-
-/* MS-DOS EXFAT volume label directory entry (32 bytes) */
-struct volm_dentry_t {
-	u8       type;
-	u8       label_len;
-	u8       unicode_0_10[22];
-	u8       reserved[8];
-};
-
-/* unused entry hint information */
-struct uentry_t {
-	u32      dir;
-	s32       entry;
-	struct chain_t     clu;
-};
-
-/* unicode name structure */
-struct uni_name_t {
-	u16      name[MAX_NAME_LENGTH];
-	u16      name_hash;
-	u8       name_len;
-};
-
-struct buf_cache_t {
-	struct buf_cache_t *next;
-	struct buf_cache_t *prev;
-	struct buf_cache_t *hash_next;
-	struct buf_cache_t *hash_prev;
-	s32                drv;
-	sector_t          sec;
-	bool              locked;
-	struct buffer_head   *buf_bh;
-};
-
-struct fs_info_t {
-	u32      drv;                    /* drive ID */
-	u32      vol_id;                 /* volume serial number */
-
-	u64      num_sectors;            /* num of sectors in volume */
-	u32      num_clusters;           /* num of clusters in volume */
-	u32      cluster_size;           /* cluster size in bytes */
-	u32      cluster_size_bits;
-	u32      sectors_per_clu;        /* cluster size in sectors */
-	u32      sectors_per_clu_bits;
-
-	u32      PBR_sector;             /* PBR sector */
-	u32      FAT1_start_sector;      /* FAT1 start sector */
-	u32      FAT2_start_sector;      /* FAT2 start sector */
-	u32      root_start_sector;      /* root dir start sector */
-	u32      data_start_sector;      /* data area start sector */
-	u32      num_FAT_sectors;        /* num of FAT sectors */
-
-	u32      root_dir;               /* root dir cluster */
-	u32      dentries_in_root;       /* num of dentries in root dir */
-	u32      dentries_per_clu;       /* num of dentries per cluster */
-
-	u32      vol_flag;               /* volume dirty flag */
-	struct buffer_head *pbr_bh;         /* PBR sector */
-
-	u32      map_clu;                /* allocation bitmap start cluster */
-	u32      map_sectors;            /* num of allocation bitmap sectors */
-	struct buffer_head **vol_amap;      /* allocation bitmap */
-
-	u16 **vol_utbl;			/* upcase table */
-
-	u32 clu_srch_ptr;		/* cluster search pointer */
-	u32 used_clusters;		/* number of used clusters */
-	struct uentry_t hint_uentry;	/* unused entry hint information */
-
-	u32 dev_ejected;	/* block device operation error flag */
-
-	struct mutex v_mutex;
-
-	/* FAT cache */
-	struct buf_cache_t FAT_cache_array[FAT_CACHE_SIZE];
-	struct buf_cache_t FAT_cache_lru_list;
-	struct buf_cache_t FAT_cache_hash_list[FAT_CACHE_HASH_SIZE];
-
-	/* buf cache */
-	struct buf_cache_t buf_cache_array[BUF_CACHE_SIZE];
-	struct buf_cache_t buf_cache_lru_list;
-	struct buf_cache_t buf_cache_hash_list[BUF_CACHE_HASH_SIZE];
-};
-
-#define ES_2_ENTRIES		2
-#define ES_3_ENTRIES		3
-#define ES_ALL_ENTRIES		0
-
-struct entry_set_cache_t {
-	/* sector number that contains file_entry */
-	sector_t sector;
-
-	/* byte offset in the sector */
-	s32 offset;
-
-	/*
-	 * flag in stream entry.
-	 * 01 for cluster chain,
-	 * 03 for contig. clusteres.
-	 */
-	s32 alloc_flag;
-
-	u32 num_entries;
-
-	/* __buf should be the last member */
-	void *__buf;
-};
-
-#define EXFAT_ERRORS_CONT	1	/* ignore error and continue */
-#define EXFAT_ERRORS_PANIC	2	/* panic on error */
-#define EXFAT_ERRORS_RO		3	/* remount r/o on error */
-
-/* ioctl command */
-#define EXFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32)
-
-struct exfat_mount_options {
-	kuid_t fs_uid;
-	kgid_t fs_gid;
-	unsigned short fs_fmask;
-	unsigned short fs_dmask;
-
-	/* permission for setting the [am]time */
-	unsigned short allow_utime;
-
-	/* codepage for shortname conversions */
-	unsigned short codepage;
-
-	/* charset for filename input/display */
-	char *iocharset;
-
-	unsigned char casesensitive;
-
-	/* on error: continue, panic, remount-ro */
-	unsigned char errors;
-#ifdef CONFIG_STAGING_EXFAT_DISCARD
-	/* flag on if -o dicard specified and device support discard() */
-	unsigned char discard;
-#endif /* CONFIG_STAGING_EXFAT_DISCARD */
-};
-
-#define EXFAT_HASH_BITS		8
-#define EXFAT_HASH_SIZE		BIT(EXFAT_HASH_BITS)
-
-/*
- * EXFAT file system in-core superblock data
- */
-struct bd_info_t {
-	s32 sector_size;	/* in bytes */
-	s32 sector_size_bits;
-	s32 sector_size_mask;
-
-	/* total number of sectors in this block device */
-	s32 num_sectors;
-
-	/* opened or not */
-	bool opened;
-};
-
-struct exfat_sb_info {
-	struct fs_info_t fs_info;
-	struct bd_info_t bd_info;
-
-	struct exfat_mount_options options;
-
-	int s_dirt;
-	struct mutex s_lock;
-	struct nls_table *nls_disk; /* Codepage used on disk */
-	struct nls_table *nls_io;   /* Charset used for input and display */
-
-	struct inode *fat_inode;
-
-	spinlock_t inode_hash_lock;
-	struct hlist_head inode_hashtable[EXFAT_HASH_SIZE];
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
-	long debug_flags;
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
-};
-
-/*
- * EXFAT file system inode data in memory
- */
-struct exfat_inode_info {
-	struct file_id_t fid;
-	char  *target;
-	/* NOTE: mmu_private is 64bits, so must hold ->i_mutex to access */
-	loff_t mmu_private;	/* physically allocated size */
-	loff_t i_pos;		/* on-disk position of directory entry or 0 */
-	struct hlist_node i_hash_fat;	/* hash by i_location */
-	struct rw_semaphore truncate_lock;
-	struct inode vfs_inode;
-	struct rw_semaphore i_alloc_sem; /* protect bmap against truncate */
-};
-
-#define EXFAT_SB(sb)		((struct exfat_sb_info *)((sb)->s_fs_info))
-
-static inline struct exfat_inode_info *EXFAT_I(struct inode *inode)
-{
-	return container_of(inode, struct exfat_inode_info, vfs_inode);
-}
-
-/* NLS management function */
-u16 nls_upper(struct super_block *sb, u16 a);
-int nls_uniname_cmp(struct super_block *sb, u16 *a, u16 *b);
-void nls_uniname_to_cstring(struct super_block *sb, u8 *p_cstring,
-			    struct uni_name_t *p_uniname);
-void nls_cstring_to_uniname(struct super_block *sb,
-			    struct uni_name_t *p_uniname, u8 *p_cstring,
-			    bool *p_lossy);
-
-/* buffer cache management */
-void exfat_buf_init(struct super_block *sb);
-void exfat_buf_shutdown(struct super_block *sb);
-int exfat_fat_read(struct super_block *sb, u32 loc, u32 *content);
-s32 exfat_fat_write(struct super_block *sb, u32 loc, u32 content);
-u8 *exfat_fat_getblk(struct super_block *sb, sector_t sec);
-void exfat_fat_modify(struct super_block *sb, sector_t sec);
-void exfat_fat_release_all(struct super_block *sb);
-u8 *exfat_buf_getblk(struct super_block *sb, sector_t sec);
-void exfat_buf_modify(struct super_block *sb, sector_t sec);
-void exfat_buf_lock(struct super_block *sb, sector_t sec);
-void exfat_buf_unlock(struct super_block *sb, sector_t sec);
-void exfat_buf_release(struct super_block *sb, sector_t sec);
-void exfat_buf_release_all(struct super_block *sb);
-
-/* fs management functions */
-void fs_set_vol_flags(struct super_block *sb, u32 new_flag);
-void fs_error(struct super_block *sb);
-
-/* cluster management functions */
-s32 count_num_clusters(struct super_block *sb, struct chain_t *dir);
-void exfat_chain_cont_cluster(struct super_block *sb, u32 chain, s32 len);
-
-/* allocation bitmap management functions */
-s32 load_alloc_bitmap(struct super_block *sb);
-void free_alloc_bitmap(struct super_block *sb);
-
-/* upcase table management functions */
-s32 load_upcase_table(struct super_block *sb);
-void free_upcase_table(struct super_block *sb);
-
-/* dir entry management functions */
-struct timestamp_t *tm_current(struct timestamp_t *tm);
-
-struct dentry_t *get_entry_in_dir(struct super_block *sb, struct chain_t *p_dir,
-				  s32 entry, sector_t *sector);
-struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
-					       struct chain_t *p_dir, s32 entry,
-					       u32 type,
-					       struct dentry_t **file_ep);
-void release_entry_set(struct entry_set_cache_t *es);
-s32 count_dir_entries(struct super_block *sb, struct chain_t *p_dir);
-void update_dir_checksum(struct super_block *sb, struct chain_t *p_dir,
-			 s32 entry);
-void update_dir_checksum_with_entry_set(struct super_block *sb,
-					struct entry_set_cache_t *es);
-bool is_dir_empty(struct super_block *sb, struct chain_t *p_dir);
-
-/* name conversion functions */
-s32 get_num_entries(struct super_block *sb, struct chain_t *p_dir,
-		    struct uni_name_t *p_uniname, s32 *entries);
-u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type);
-
-/* name resolution functions */
-s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
-		 struct uni_name_t *p_uniname);
-
-/* file operation functions */
-s32 exfat_mount(struct super_block *sb, struct pbr_sector_t *p_pbr);
-s32 create_dir(struct inode *inode, struct chain_t *p_dir,
-	       struct uni_name_t *p_uniname, struct file_id_t *fid);
-s32 create_file(struct inode *inode, struct chain_t *p_dir,
-		struct uni_name_t *p_uniname, struct file_id_t *fid);
-void remove_file(struct inode *inode, struct chain_t *p_dir, s32 entry);
-s32 exfat_rename_file(struct inode *inode, struct chain_t *p_dir, s32 old_entry,
-		      struct uni_name_t *p_uniname, struct file_id_t *fid);
-s32 move_file(struct inode *inode, struct chain_t *p_olddir, s32 oldentry,
-	      struct chain_t *p_newdir, struct uni_name_t *p_uniname,
-	      struct file_id_t *fid);
-
-/* sector read/write functions */
-int sector_read(struct super_block *sb, sector_t sec,
-		struct buffer_head **bh, bool read);
-int sector_write(struct super_block *sb, sector_t sec,
-		 struct buffer_head *bh, bool sync);
-int multi_sector_read(struct super_block *sb, sector_t sec,
-		      struct buffer_head **bh, s32 num_secs, bool read);
-int multi_sector_write(struct super_block *sb, sector_t sec,
-		       struct buffer_head *bh, s32 num_secs, bool sync);
-
-void exfat_bdev_open(struct super_block *sb);
-void exfat_bdev_close(struct super_block *sb);
-int exfat_bdev_read(struct super_block *sb, sector_t secno,
-		    struct buffer_head **bh, u32 num_secs, bool read);
-int exfat_bdev_write(struct super_block *sb, sector_t secno,
-		     struct buffer_head *bh, u32 num_secs, bool sync);
-int exfat_bdev_sync(struct super_block *sb);
-
-/* cluster operation functions */
-s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc,
-			struct chain_t *p_chain);
-void exfat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
-			s32 do_relse);
-s32 exfat_count_used_clusters(struct super_block *sb);
-
-/* dir operation functions */
-s32 exfat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
-			 struct uni_name_t *p_uniname, s32 num_entries,
-			 u32 type);
-void exfat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
-			    s32 entry, s32 order, s32 num_entries);
-void exfat_get_uni_name_from_ext_entry(struct super_block *sb,
-				       struct chain_t *p_dir, s32 entry,
-				       u16 *uniname);
-s32 exfat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
-			    s32 entry, struct dentry_t *p_entry);
-s32 exfat_calc_num_entries(struct uni_name_t *p_uniname);
-
-/* dir entry getter/setter */
-u32 exfat_get_entry_type(struct dentry_t *p_entry);
-u32 exfat_get_entry_attr(struct dentry_t *p_entry);
-void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr);
-u8 exfat_get_entry_flag(struct dentry_t *p_entry);
-void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flags);
-u32 exfat_get_entry_clu0(struct dentry_t *p_entry);
-void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu);
-u64 exfat_get_entry_size(struct dentry_t *p_entry);
-void exfat_set_entry_size(struct dentry_t *p_entry, u64 size);
-void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
-			  u8 mode);
-void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
-			  u8 mode);
-
-extern const u8 uni_upcase[];
-#endif /* _EXFAT_H */