[dfs_v1][elmfat] Remove obsolete old mutex API functions

Co-authored-by: BernardXiong <1241087+BernardXiong@users.noreply.github.com>

components/dfs/dfs_v1/filesystems/elmfat/00history.txt

@@ -357,3 +357,33 @@ R0.14b (April 17, 2021)
   Fixed some compiler warnings.
 
 
+
+R0.15 (November 6, 2022)
+  Changed user provided synchronization functions in order to completely eliminate the platform dependency from FatFs code.
+  FF_SYNC_t is removed from the configuration options.
+  Fixed a potential error in f_mount when FF_FS_REENTRANT.
+  Fixed file lock control FF_FS_LOCK is not mutal excluded when FF_FS_REENTRANT && FF_VOLUMES > 1 is true.
+  Fixed f_mkfs() creates broken exFAT volume when the size of volume is >= 2^32 sectors.
+  Fixed string functions cannot write the unicode characters not in BMP when FF_LFN_UNICODE == 2 (UTF-8).
+  Fixed a compatibility issue in identification of GPT header.
+
+
+
+R0.15a (November 22, 2024)
+  Fixed a complie error when FF_FS_LOCK != 0.
+  Fixed a potential issue when work FatFs concurrency with FF_FS_REENTRANT, FF_VOLUMES >= 2 and FF_FS_LOCK > 0.
+  Made f_setlabel() accept a volume label in Unix style volume ID when FF_STR_VOLUME_ID == 2.
+  Made FatFs update PercInUse field in exFAT VBR. (A preceding f_getfree() is needed for the accuracy)
+
+
+
+R0.15b (June 21, 2025)
+  Added support for timestamp of created time. (FF_FS_CRTIME)
+  Fixed FatFs fails to load the FsInfo in FAT32 volumes and the f_getfree always be forced a full FAT scan which takes a long time. (appeared at R0.15a)
+
+
+
+R0.16 (July 22, 2025)
+  Removed a long-pending limitation that f_getcwd and double-dot .. in the path name did not work on the exFAT volume.
+  Fixed f_readdir cannot detect end of directory and it leads the application process into infinite loop. (appeared at R0.15b)
+  Fixed dot names with terminating separator or duplicated separator are rejected when LFN is not enabled.

components/dfs/dfs_v1/filesystems/elmfat/00readme.txt

@@ -1,4 +1,4 @@
-FatFs Module Source Files R0.14b
+FatFs Module Source Files R0.16
 
 
 FILES

components/dfs/dfs_v1/filesystems/elmfat/dfs_elm.c

@@ -999,41 +999,41 @@ DWORD get_fattime(void)
 }
 
 #if FF_FS_REENTRANT
-int ff_cre_syncobj(BYTE drv, FF_SYNC_t *m)
+static rt_mutex_t Mutex[FF_VOLUMES + 1];
+
+int ff_mutex_create (int vol)
 {
     char name[8];
     rt_mutex_t mutex;
 
-    rt_snprintf(name, sizeof(name), "fat%d", drv);
+    rt_snprintf(name, sizeof(name), "fat%d", vol);
     mutex = rt_mutex_create(name, RT_IPC_FLAG_PRIO);
     if (mutex != RT_NULL)
     {
-        *m = mutex;
+        Mutex[vol] = mutex;
         return RT_TRUE;
     }
 
     return RT_FALSE;
 }
 
-int ff_del_syncobj(FF_SYNC_t m)
+void ff_mutex_delete (int vol)
 {
-    if (m != RT_NULL)
-        rt_mutex_delete(m);
-
-    return RT_TRUE;
+    if (Mutex[vol] != RT_NULL)
+        rt_mutex_delete(Mutex[vol]);
 }
 
-int ff_req_grant(FF_SYNC_t m)
+int ff_mutex_take (int vol)
 {
-    if (rt_mutex_take(m, FF_FS_TIMEOUT) == RT_EOK)
+    if (rt_mutex_take(Mutex[vol], FF_FS_TIMEOUT) == RT_EOK)
         return RT_TRUE;
 
     return RT_FALSE;
 }
 
-void ff_rel_grant(FF_SYNC_t m)
+void ff_mutex_give (int vol)
 {
-    rt_mutex_release(m);
+    rt_mutex_release(Mutex[vol]);
 }
 
 #endif

components/dfs/dfs_v1/filesystems/elmfat/diskio.h

@@ -1,5 +1,5 @@
 /*-----------------------------------------------------------------------/
-/  Low level disk interface modlue include file   (C)ChaN, 2019          /
+/  Low level disk interface modlue include file   (C)ChaN, 2025          /
 /-----------------------------------------------------------------------*/
 
 #ifndef _DISKIO_DEFINED
@@ -55,7 +55,7 @@ DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
 #define CTRL_EJECT			7	/* Eject media */
 #define CTRL_FORMAT			8	/* Create physical format on the media */
 
-/* MMC/SDC specific ioctl command */
+/* MMC/SDC specific ioctl command (Not used by FatFs) */
 #define MMC_GET_TYPE		10	/* Get card type */
 #define MMC_GET_CSD			11	/* Get CSD */
 #define MMC_GET_CID			12	/* Get CID */
@@ -65,7 +65,7 @@ DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
 #define ISDIO_WRITE			56	/* Write data to SD iSDIO register */
 #define ISDIO_MRITE			57	/* Masked write data to SD iSDIO register */
 
-/* ATA/CF specific ioctl command */
+/* ATA/CF specific ioctl command (Not used by FatFs) */
 #define ATA_GET_REV			20	/* Get F/W revision */
 #define ATA_GET_MODEL		21	/* Get model name */
 #define ATA_GET_SN			22	/* Get serial number */

components/dfs/dfs_v1/filesystems/elmfat/ff.h

@@ -1,8 +1,8 @@
 /*----------------------------------------------------------------------------/
-/  FatFs - Generic FAT Filesystem module  R0.14b                              /
+/  FatFs - Generic FAT Filesystem module  R0.16                               /
 /-----------------------------------------------------------------------------/
 /
-/ Copyright (C) 2021, ChaN, all right reserved.
+/ Copyright (C) 2025, ChaN, all right reserved.
 /
 / FatFs module is an open source software. Redistribution and use of FatFs in
 / source and binary forms, with or without modification, are permitted provided
@@ -20,15 +20,16 @@
 
 
 #ifndef FF_DEFINED
-#define FF_DEFINED	86631	/* Revision ID */
+#define FF_DEFINED	80386	/* Revision ID */
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 #include <rtthread.h>
+#if !defined(FFCONF_DEF)
 #include "ffconf.h"		/* FatFs configuration options */
-
+#endif
 #if FF_DEFINED != FFCONF_DEF
 #error Wrong configuration file (ffconf.h).
 #endif
@@ -49,18 +50,18 @@ typedef unsigned __int64 QWORD;
 #include <stdint.h>
 typedef unsigned int	UINT;	/* int must be 16-bit or 32-bit */
 typedef unsigned char	BYTE;	/* char must be 8-bit */
-typedef uint16_t		WORD;	/* 16-bit unsigned integer */
-typedef uint32_t		DWORD;	/* 32-bit unsigned integer */
-typedef uint64_t		QWORD;	/* 64-bit unsigned integer */
-typedef WORD			WCHAR;	/* UTF-16 character type */
+typedef uint16_t		WORD;	/* 16-bit unsigned */
+typedef uint32_t		DWORD;	/* 32-bit unsigned */
+typedef uint64_t		QWORD;	/* 64-bit unsigned */
+typedef WORD			WCHAR;	/* UTF-16 code unit */
 
 #else  	/* Earlier than C99 */
 #define FF_INTDEF 1
 typedef unsigned int	UINT;	/* int must be 16-bit or 32-bit */
 typedef unsigned char	BYTE;	/* char must be 8-bit */
-typedef unsigned short	WORD;	/* 16-bit unsigned integer */
-typedef unsigned long	DWORD;	/* 32-bit unsigned integer */
-typedef WORD			WCHAR;	/* UTF-16 character type */
+typedef unsigned short	WORD;	/* short must be 16-bit */
+typedef unsigned long	DWORD;	/* long must be 32-bit */
+typedef WORD			WCHAR;	/* UTF-16 code unit */
 #endif
 
 
@@ -114,66 +115,78 @@ typedef char TCHAR;
 
 #if FF_MULTI_PARTITION		/* Multiple partition configuration */
 typedef struct {
-	BYTE pd;	/* Physical drive number */
-	BYTE pt;	/* Partition: 0:Auto detect, 1-4:Forced partition) */
+	BYTE pd;	/* Associated physical drive */
+	BYTE pt;	/* Associated partition (0:Auto detect, 1-4:Forced partition) */
 } PARTITION;
-extern PARTITION VolToPart[];	/* Volume - Partition mapping table */
+extern PARTITION VolToPart[];	/* Volume to partition mapping table */
 #endif
 
 #if FF_STR_VOLUME_ID
 #ifndef FF_VOLUME_STRS
-extern const char* VolumeStr[FF_VOLUMES];	/* User defied volume ID */
+extern const char* VolumeStr[FF_VOLUMES];	/* User defined volume ID table */
 #endif
 #endif
 
 
+/* Current working directory structure (FFXCWDS) */
+
+#if FF_FS_EXFAT && FF_FS_RPATH
+#if FF_PATH_DEPTH < 1
+#error FF_PATH_DEPTH must not be zero
+#endif
+typedef struct {
+	DWORD	d_scl;		/* Directory start cluster (0:root dir) */
+	DWORD	d_size;		/* Size of directory (b7-b0: cluster chain status) (invalid if d_scl == 0) */
+	DWORD	nxt_ofs;	/* Offset of entry of next dir in this directory (invalid if last link) */
+} FFXCWDL;
+typedef struct {
+	UINT	depth;		/* Current directory depth (0:root dir) */
+	FFXCWDL	tbl[FF_PATH_DEPTH + 1];	/* Directory chain of current working directory path */
+} FFXCWDS;
+#endif
+
 
 /* Filesystem object structure (FATFS) */
 
 typedef struct {
-	BYTE	fs_type;		/* Filesystem type (0:not mounted) */
-	BYTE	pdrv;			/* Associated physical drive */
-	BYTE	n_fats;			/* Number of FATs (1 or 2) */
-	BYTE	wflag;			/* win[] flag (b0:dirty) */
-	BYTE	fsi_flag;		/* FSINFO flags (b7:disabled, b0:dirty) */
-	WORD	id;				/* Volume mount ID */
-	WORD	n_rootdir;		/* Number of root directory entries (FAT12/16) */
-	WORD	csize;			/* Cluster size [sectors] */
+	BYTE	fs_type;	/* Filesystem type (0:not mounted) */
+	BYTE	pdrv;		/* Physical drive that holds this volume */
+	BYTE	ldrv;		/* Logical drive number (used only when FF_FS_REENTRANT) */
+	BYTE	n_fats;		/* Number of FATs (1 or 2) */
+	BYTE	wflag;		/* win[] status (b0:dirty) */
+	BYTE	fsi_flag;	/* Allocation information control (b7:disabled, b0:dirty) */
+	WORD	id;			/* Volume mount ID */
+	WORD	n_rootdir;	/* Number of root directory entries (FAT12/16) */
+	WORD	csize;		/* Cluster size [sectors] */
 #if FF_MAX_SS != FF_MIN_SS
-	WORD	ssize;			/* Sector size (512, 1024, 2048 or 4096) */
+	WORD	ssize;		/* Sector size (512, 1024, 2048 or 4096) */
 #endif
 #if FF_USE_LFN
-	WCHAR*	lfnbuf;			/* LFN working buffer */
-#endif
-#if FF_FS_EXFAT
-	BYTE*	dirbuf;			/* Directory entry block scratchpad buffer for exFAT */
-#endif
-#if FF_FS_REENTRANT
-	FF_SYNC_t	sobj;		/* Identifier of sync object */
+	WCHAR*	lfnbuf;		/* Pointer to LFN working buffer */
 #endif
 #if !FF_FS_READONLY
-	DWORD	last_clst;		/* Last allocated cluster */
-	DWORD	free_clst;		/* Number of free clusters */
+	DWORD	last_clst;	/* Last allocated cluster (invalid if >=n_fatent) */
+	DWORD	free_clst;	/* Number of free clusters (invalid if >=fs->n_fatent-2) */
 #endif
 #if FF_FS_RPATH
-	DWORD	cdir;			/* Current directory start cluster (0:root) */
+	DWORD	cdir;		/* Current directory start cluster (0:root) */
+#endif
+	DWORD	n_fatent;	/* Number of FAT entries (number of clusters + 2) */
+	DWORD	fsize;		/* Number of sectors per FAT */
+	LBA_t	winsect;	/* Current sector appearing in the win[] */
+	LBA_t	volbase;	/* Volume base sector */
+	LBA_t	fatbase;	/* FAT base sector */
+	LBA_t	dirbase;	/* Root directory base sector (FAT12/16) or cluster (FAT32/exFAT) */
+	LBA_t	database;	/* Data base sector */
 #if FF_FS_EXFAT
-	DWORD	cdc_scl;		/* Containing directory start cluster (invalid when cdir is 0) */
-	DWORD	cdc_size;		/* b31-b8:Size of containing directory, b7-b0: Chain status */
-	DWORD	cdc_ofs;		/* Offset in the containing directory (invalid when cdir is 0) */
+	LBA_t	bitbase;	/* Allocation bitmap base sector */
+	BYTE*	dirbuf;		/* Pointer to directory entry block buffer */
+#if FF_FS_RPATH
+	FFXCWDS	xcwds;		/* Crrent working directory structure */
+	FFXCWDS	xcwds2;		/* Working buffer to follow the path */
 #endif
 #endif
-	DWORD	n_fatent;		/* Number of FAT entries (number of clusters + 2) */
-	DWORD	fsize;			/* Size of an FAT [sectors] */
-	LBA_t	volbase;		/* Volume base sector */
-	LBA_t	fatbase;		/* FAT base sector */
-	LBA_t	dirbase;		/* Root directory base sector/cluster */
-	LBA_t	database;		/* Data base sector */
-#if FF_FS_EXFAT
-	LBA_t	bitbase;		/* Allocation bitmap base sector */
-#endif
-	LBA_t	winsect;		/* Current sector appearing in the win[] */
-	BYTE	win[FF_MAX_SS];	/* Disk access window for Directory, FAT (and file data at tiny cfg) */
+	BYTE	win[FF_MAX_SS];	/* Disk access window for directory, FAT (and file data in tiny cfg) */
 } FATFS;
 
 
@@ -181,21 +194,21 @@ typedef struct {
 /* Object ID and allocation information (FFOBJID) */
 
 typedef struct {
-	FATFS*	fs;				/* Pointer to the hosting volume of this object */
-	WORD	id;				/* Hosting volume mount ID */
-	BYTE	attr;			/* Object attribute */
-	BYTE	stat;			/* Object chain status (b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session, b2:sub-directory stretched) */
-	DWORD	sclust;			/* Object data start cluster (0:no cluster or root directory) */
-	FSIZE_t	objsize;		/* Object size (valid when sclust != 0) */
+	FATFS*	fs;			/* Pointer to the volume holding this object */
+	WORD	id;			/* Volume mount ID when this object was opened */
+	BYTE	attr;		/* Object attribute */
+	BYTE	stat;		/* Object chain status (exFAT: b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session, b2:sub-directory stretched) */
+	DWORD	sclust;		/* Object data cluster (0:no data or root directory) */
+	FSIZE_t	objsize;	/* Object size (valid when sclust != 0) */
 #if FF_FS_EXFAT
-	DWORD	n_cont;			/* Size of first fragment - 1 (valid when stat == 3) */
-	DWORD	n_frag;			/* Size of last fragment needs to be written to FAT (valid when not zero) */
-	DWORD	c_scl;			/* Containing directory start cluster (valid when sclust != 0) */
-	DWORD	c_size;			/* b31-b8:Size of containing directory, b7-b0: Chain status (valid when c_scl != 0) */
-	DWORD	c_ofs;			/* Offset in the containing directory (valid when file object and sclust != 0) */
+	DWORD	n_cont;		/* Size of first fragment - 1 (valid when stat == 3) */
+	DWORD	n_frag;		/* Size of last fragment needs to be written to FAT (valid when not zero) */
+	DWORD	c_scl;		/* Cluster of directory holding this object (valid when sclust != 0) */
+	DWORD	c_size;		/* Size of directory holding this object (b7-b0: allocation status, valid when c_scl != 0) */
+	DWORD	c_ofs;		/* Offset of entry in the holding directory */
 #endif
 #if FF_FS_LOCK
-	UINT	lockid;			/* File lock ID origin from 1 (index of file semaphore table Files[]) */
+	UINT	lockid;		/* File lock ID origin from 1 (index of file semaphore table Files[]) */
 #endif
 } FFOBJID;
 
@@ -204,18 +217,18 @@ typedef struct {
 /* File object structure (FIL) */
 
 typedef struct {
-	FFOBJID	obj;			/* Object identifier (must be the 1st member to detect invalid object pointer) */
-	BYTE	flag;			/* File status flags */
-	BYTE	err;			/* Abort flag (error code) */
-	FSIZE_t	fptr;			/* File read/write pointer (Zeroed on file open) */
-	DWORD	clust;			/* Current cluster of fpter (invalid when fptr is 0) */
-	LBA_t	sect;			/* Sector number appearing in buf[] (0:invalid) */
+	FFOBJID	obj;		/* Object identifier (must be the 1st member to detect invalid object pointer) */
+	BYTE	flag;		/* File status flags */
+	BYTE	err;		/* Abort flag (error code) */
+	FSIZE_t	fptr;		/* File read/write pointer (0 on open) */
+	DWORD	clust;		/* Current cluster of fptr (invalid when fptr is 0) */
+	LBA_t	sect;		/* Sector number appearing in buf[] (0:invalid) */
 #if !FF_FS_READONLY
-	LBA_t	dir_sect;		/* Sector number containing the directory entry (not used at exFAT) */
-	BYTE*	dir_ptr;		/* Pointer to the directory entry in the win[] (not used at exFAT) */
+	LBA_t	dir_sect;	/* Sector number containing the directory entry (not used in exFAT) */
+	BYTE*	dir_ptr;	/* Pointer to the directory entry in the win[] (not used in exFAT) */
 #endif
 #if FF_USE_FASTSEEK
-	DWORD*	cltbl;			/* Pointer to the cluster link map table (nulled on open, set by application) */
+	DWORD*	cltbl;		/* Pointer to the cluster link map table (nulled on open; set by application) */
 #endif
 #if !FF_FS_TINY
 	BYTE	buf[FF_MAX_SS];	/* File private data read/write window */
@@ -227,40 +240,44 @@ typedef struct {
 /* Directory object structure (DIR) */
 
 typedef struct {
-	FFOBJID	obj;			/* Object identifier */
-	DWORD	dptr;			/* Current read/write offset */
-	DWORD	clust;			/* Current cluster */
-	LBA_t	sect;			/* Current sector (0:Read operation has terminated) */
-	BYTE*	dir;			/* Pointer to the directory item in the win[] */
-	BYTE	fn[12];			/* SFN (in/out) {body[8],ext[3],status[1]} */
+	FFOBJID	obj;		/* Object identifier (must be the 1st member to detect invalid object pointer) */
+	DWORD	dptr;		/* Current read/write offset */
+	DWORD	clust;		/* Current cluster */
+	LBA_t	sect;		/* Current sector (0:no more item to read) */
+	BYTE*	dir;		/* Pointer to the directory item in the win[] in filesystem object */
+	BYTE	fn[12];		/* SFN (in/out) {body[0-7],ext[8-10],status[11]} */
 #if FF_USE_LFN
-	DWORD	blk_ofs;		/* Offset of current entry block being processed (0xFFFFFFFF:Invalid) */
+	DWORD	blk_ofs;	/* Offset of current entry block being processed (0xFFFFFFFF:invalid) */
 #endif
 #if FF_USE_FIND
-	const TCHAR* pat;		/* Pointer to the name matching pattern */
+	const TCHAR *pat;	/* Pointer to the name matching pattern */
 #endif
 } DIR;
 
 
 
-/* File information structure (FILINFO) */
+/* File/directory information structure (FILINFO) */
 
 typedef struct {
-	FSIZE_t	fsize;			/* File size */
-	WORD	fdate;			/* Modified date */
-	WORD	ftime;			/* Modified time */
-	BYTE	fattrib;		/* File attribute */
+	FSIZE_t	fsize;			/* File size (invalid for directory) */
+	WORD	fdate;			/* Date of file modification or directory creation */
+	WORD	ftime;			/* Time of file modification or directory creation */
+#if FF_FS_CRTIME
+	WORD	crdate;			/* Date of object createion */
+	WORD	crtime;			/* Time of object createion */
+#endif
+	BYTE	fattrib;		/* Object attribute */
 #if FF_USE_LFN
-	TCHAR	altname[FF_SFN_BUF + 1];/* Altenative file name */
-	TCHAR	fname[FF_LFN_BUF + 1];	/* Primary file name */
+	TCHAR	altname[FF_SFN_BUF + 1];/* Alternative object name */
+	TCHAR	fname[FF_LFN_BUF + 1];	/* Primary object name */
 #else
-	TCHAR	fname[12 + 1];	/* File name */
+	TCHAR	fname[12 + 1];	/* Object name */
 #endif
 } FILINFO;
 
 
 
-/* Format parameter structure (MKFS_PARM) */
+/* Format parameter structure (MKFS_PARM) used for f_mkfs() */
 
 typedef struct {
 	BYTE fmt;			/* Format option (FM_FAT, FM_FAT32, FM_EXFAT and FM_SFD) */
@@ -275,32 +292,34 @@ typedef struct {
 /* File function return code (FRESULT) */
 
 typedef enum {
-	FR_OK = 0,				/* (0) Succeeded */
+	FR_OK = 0,				/* (0) Function succeeded */
 	FR_DISK_ERR,			/* (1) A hard error occurred in the low level disk I/O layer */
 	FR_INT_ERR,				/* (2) Assertion failed */
-	FR_NOT_READY,			/* (3) The physical drive cannot work */
+	FR_NOT_READY,			/* (3) The physical drive does not work */
 	FR_NO_FILE,				/* (4) Could not find the file */
 	FR_NO_PATH,				/* (5) Could not find the path */
 	FR_INVALID_NAME,		/* (6) The path name format is invalid */
-	FR_DENIED,				/* (7) Access denied due to prohibited access or directory full */
-	FR_EXIST,				/* (8) Access denied due to prohibited access */
+	FR_DENIED,				/* (7) Access denied due to a prohibited access or directory full */
+	FR_EXIST,				/* (8) Access denied due to a prohibited access */
 	FR_INVALID_OBJECT,		/* (9) The file/directory object is invalid */
 	FR_WRITE_PROTECTED,		/* (10) The physical drive is write protected */
 	FR_INVALID_DRIVE,		/* (11) The logical drive number is invalid */
 	FR_NOT_ENABLED,			/* (12) The volume has no work area */
-	FR_NO_FILESYSTEM,		/* (13) There is no valid FAT volume */
-	FR_MKFS_ABORTED,		/* (14) The f_mkfs() aborted due to any problem */
-	FR_TIMEOUT,				/* (15) Could not get a grant to access the volume within defined period */
+	FR_NO_FILESYSTEM,		/* (13) Could not find a valid FAT volume */
+	FR_MKFS_ABORTED,		/* (14) The f_mkfs function aborted due to some problem */
+	FR_TIMEOUT,				/* (15) Could not take control of the volume within defined period */
 	FR_LOCKED,				/* (16) The operation is rejected according to the file sharing policy */
-	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated */
+	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated, given buffer size is insufficient or too deep path */
 	FR_TOO_MANY_OPEN_FILES,	/* (18) Number of open files > FF_FS_LOCK */
 	FR_INVALID_PARAMETER	/* (19) Given parameter is invalid */
 } FRESULT;
 
 
 
+
+/*--------------------------------------------------------------*/
+/* FatFs Module Application Interface                           */
 /*--------------------------------------------------------------*/
-/* FatFs module application interface                           */
 
 FRESULT f_open (FIL* fp, const TCHAR* path, BYTE mode);				/* Open or create a file */
 FRESULT f_close (FIL* fp);											/* Close an open file object */
@@ -338,6 +357,8 @@ int f_puts (const TCHAR* str, FIL* cp);								/* Put a string to the file */
 int f_printf (FIL* fp, const TCHAR* str, ...);						/* Put a formatted string to the file */
 TCHAR* f_gets (TCHAR* buff, int len, FIL* fp);						/* Get a string from the file */
 
+/* Some API fucntions are implemented as macro */
+
 #define f_eof(fp) ((int)((fp)->fptr == (fp)->obj.objsize))
 #define f_error(fp) ((fp)->err)
 #define f_tell(fp) ((fp)->fptr)
@@ -351,40 +372,45 @@ TCHAR* f_gets (TCHAR* buff, int len, FIL* fp);						/* Get a string from the fil
 
 
 /*--------------------------------------------------------------*/
-/* Additional user defined functions                            */
+/* Additional Functions                                         */
+/*--------------------------------------------------------------*/
 
-/* RTC function */
+/* RTC function (provided by user) */
 #if !FF_FS_READONLY && !FF_FS_NORTC
-DWORD get_fattime (void);
+DWORD get_fattime (void);	/* Get current time */
 #endif
 
-/* LFN support functions */
-#if FF_USE_LFN >= 1						/* Code conversion (defined in unicode.c) */
+
+/* LFN support functions (defined in ffunicode.c) */
+
+#if FF_USE_LFN >= 1
 WCHAR ff_oem2uni (WCHAR oem, WORD cp);	/* OEM code to Unicode conversion */
 WCHAR ff_uni2oem (DWORD uni, WORD cp);	/* Unicode to OEM code conversion */
 DWORD ff_wtoupper (DWORD uni);			/* Unicode upper-case conversion */
 #endif
-#if FF_USE_LFN == 3						/* Dynamic memory allocation */
-void* ff_memalloc (UINT msize);			/* Allocate memory block */
-void ff_memfree (void* mblock);			/* Free memory block */
-#endif
 
-/* Sync functions */
-#if FF_FS_REENTRANT
-int ff_cre_syncobj (BYTE vol, FF_SYNC_t* sobj);	/* Create a sync object */
-int ff_req_grant (FF_SYNC_t sobj);		/* Lock sync object */
-void ff_rel_grant (FF_SYNC_t sobj);		/* Unlock sync object */
-int ff_del_syncobj (FF_SYNC_t sobj);	/* Delete a sync object */
+
+/* O/S dependent functions (samples available in ffsystem.c) */
+
+#if FF_USE_LFN == 3		/* Dynamic memory allocation */
+void* ff_memalloc (UINT msize);		/* Allocate memory block */
+void ff_memfree (void* mblock);		/* Free memory block */
+#endif
+#if FF_FS_REENTRANT		/* Sync functions */
+int ff_mutex_create (int vol);		/* Create a sync object */
+void ff_mutex_delete (int vol);		/* Delete a sync object */
+int ff_mutex_take (int vol);		/* Lock sync object */
+void ff_mutex_give (int vol);		/* Unlock sync object */
 #endif
 
 
 
 
 /*--------------------------------------------------------------*/
-/* Flags and offset address                                     */
+/* Flags and Offset Address                                     */
+/*--------------------------------------------------------------*/
 
-
-/* File access mode and open method flags (3rd argument of f_open) */
+/* File access mode and open method flags (3rd argument of f_open function) */
 #define	FA_READ				0x01
 #define	FA_WRITE			0x02
 #define	FA_OPEN_EXISTING	0x00
@@ -393,10 +419,10 @@ int ff_del_syncobj (FF_SYNC_t sobj);	/* Delete a sync object */
 #define	FA_OPEN_ALWAYS		0x10
 #define	FA_OPEN_APPEND		0x30
 
-/* Fast seek controls (2nd argument of f_lseek) */
+/* Fast seek controls (2nd argument of f_lseek function) */
 #define CREATE_LINKMAP	((FSIZE_t)0 - 1)
 
-/* Format options (2nd argument of f_mkfs) */
+/* Format options (2nd argument of f_mkfs function) */
 #define FM_FAT		0x01
 #define FM_FAT32	0x02
 #define FM_EXFAT	0x04

components/dfs/dfs_v1/filesystems/elmfat/ffconf.h

@@ -1,8 +1,8 @@
 /*---------------------------------------------------------------------------/
-/  FatFs Functional Configurations
+/  Configurations of FatFs Module
 /---------------------------------------------------------------------------*/
 
-#define FFCONF_DEF	86631	/* Revision ID */
+#define FFCONF_DEF	80386	/* Revision ID */
 
 /*---------------------------------------------------------------------------/
 / Function Configurations
@@ -31,36 +31,36 @@
 
 
 #define FF_USE_MKFS		1
-/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */
+/* This option switches f_mkfs(). (0:Disable or 1:Enable) */
 
 
 #define FF_USE_FASTSEEK	1
-/* This option switches fast seek function. (0:Disable or 1:Enable) */
+/* This option switches fast seek feature. (0:Disable or 1:Enable) */
 
 
 #define FF_USE_EXPAND	0
-/* This option switches f_expand function. (0:Disable or 1:Enable) */
+/* This option switches f_expand(). (0:Disable or 1:Enable) */
 
 
 #define FF_USE_CHMOD	0
-/* This option switches attribute manipulation functions, f_chmod() and f_utime().
+/* This option switches attribute control API functions, f_chmod() and f_utime().
 /  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */
 
 
 #define FF_USE_LABEL	0
-/* This option switches volume label functions, f_getlabel() and f_setlabel().
+/* This option switches volume label API functions, f_getlabel() and f_setlabel().
 /  (0:Disable or 1:Enable) */
 
 
 #define FF_USE_FORWARD	0
-/* This option switches f_forward() function. (0:Disable or 1:Enable) */
+/* This option switches f_forward(). (0:Disable or 1:Enable) */
 
 
 #define FF_USE_STRFUNC	0
 #define FF_PRINT_LLI	0
 #define FF_PRINT_FLOAT	0
 #define FF_STRF_ENCODE	3
-/* FF_USE_STRFUNC switches string functions, f_gets(), f_putc(), f_puts() and
+/* FF_USE_STRFUNC switches string API functions, f_gets(), f_putc(), f_puts() and
 /  f_printf().
 /
 /   0: Disable. FF_PRINT_LLI, FF_PRINT_FLOAT and FF_STRF_ENCODE have no effect.
@@ -68,8 +68,8 @@
 /   2: Enable with LF-CRLF conversion.
 /
 /  FF_PRINT_LLI = 1 makes f_printf() support long long argument and FF_PRINT_FLOAT = 1/2
-   makes f_printf() support floating point argument. These features want C99 or later.
-/  When FF_LFN_UNICODE >= 1 with LFN enabled, string functions convert the character
+/  makes f_printf() support floating point argument. These features want C99 or later.
+/  When FF_LFN_UNICODE >= 1 with LFN enabled, string API functions convert the character
 /  encoding in it. FF_STRF_ENCODE selects assumption of character encoding ON THE FILE
 /  to be read/written via those functions.
 /
@@ -127,15 +127,15 @@
 /* The FF_USE_LFN switches the support for LFN (long file name).
 /
 /   0: Disable LFN. FF_MAX_LFN has no effect.
-/   1: Enable LFN with static  working buffer on the BSS. Always NOT thread-safe.
+/   1: Enable LFN with static working buffer on the BSS. Always NOT thread-safe.
 /   2: Enable LFN with dynamic working buffer on the STACK.
 /   3: Enable LFN with dynamic working buffer on the HEAP.
 /
-/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN function
+/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN feature
 /  requiers certain internal working buffer occupies (FF_MAX_LFN + 1) * 2 bytes and
 /  additional (FF_MAX_LFN + 44) / 15 * 32 bytes when exFAT is enabled.
 /  The FF_MAX_LFN defines size of the working buffer in UTF-16 code unit and it can
-/  be in range of 12 to 255. It is recommended to be set it 255 to fully support LFN
+/  be in range of 12 to 255. It is recommended to be set 255 to fully support the LFN
 /  specification.
 /  When use stack for the working buffer, take care on stack overflow. When use heap
 /  memory for the working buffer, memory management functions, ff_memalloc() and
@@ -176,14 +176,26 @@
 
 
 #define FF_FS_RPATH		0
-/* This option configures support for relative path.
+/* This option configures support for relative path feature.
 /
-/   0: Disable relative path and remove related functions.
-/   1: Enable relative path. f_chdir() and f_chdrive() are available.
-/   2: f_getcwd() function is available in addition to 1.
+/   0: Disable relative path and remove related API functions.
+/   1: Enable relative path and dot names. f_chdir() and f_chdrive() are available.
+/   2: f_getcwd() is available in addition to 1.
 */
 
 
+#define FF_PATH_DEPTH	10
+/*  This option defines maximum depth of directory in the exFAT volume. It is NOT
+/   relevant to FAT/FAT32 volume.
+/   For example, FF_PATH_DEPTH = 3 will able to follow a path "/dir1/dir2/dir3/file"
+/   but a sub-directory in the dir3 will not able to be followed and set current
+/   directory.
+/   The size of filesystem object (FATFS) increases FF_PATH_DEPTH * 24 bytes.
+/   When FF_FS_EXFAT == 0 or FF_FS_RPATH == 0, this option has no effect.
+*/
+
+
+
 /*---------------------------------------------------------------------------/
 / Drive/Volume Configurations
 /---------------------------------------------------------------------------*/
@@ -201,10 +213,10 @@
 /* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
 /  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
 /  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each
-/  logical drives. Number of items must not be less than FF_VOLUMES. Valid
+/  logical drive. Number of items must not be less than FF_VOLUMES. Valid
 /  characters for the volume ID strings are A-Z, a-z and 0-9, however, they are
 /  compared in case-insensitive. If FF_STR_VOLUME_ID >= 1 and FF_VOLUME_STRS is
-/  not defined, a user defined volume string table needs to be defined as:
+/  not defined, a user defined volume string table is needed as:
 /
 /  const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sd","usb",...
 */
@@ -214,9 +226,9 @@
 /* This option switches support for multiple volumes on the physical drive.
 /  By default (0), each logical drive number is bound to the same physical drive
 /  number and only an FAT volume found on the physical drive will be mounted.
-/  When this function is enabled (1), each logical drive number can be bound to
+/  When this feature is enabled (1), each logical drive number can be bound to
 /  arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()
-/  funciton will be available. */
+/  will be available. */
 
 
 #define FF_MIN_SS		512
@@ -228,8 +240,8 @@
 /* This set of options configures the range of sector size to be supported. (512,
 /  1024, 2048 or 4096) Always set both 512 for most systems, generic memory card and
 /  harddisk, but a larger value may be required for on-board flash memory and some
-/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is configured
-/  for variable sector size mode and disk_ioctl() function needs to implement
+/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is
+/  configured for variable sector size mode and disk_ioctl() needs to implement
 /  GET_SECTOR_SIZE command. */
 
 
@@ -239,14 +251,14 @@
 
 
 #define FF_MIN_GPT		0x10000000
-/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs and
-/  f_fdisk function. 0x100000000 max. This option has no effect when FF_LBA64 == 0. */
+/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs() and 
+/  f_fdisk(). 2^32 sectors maximum. This option has no effect when FF_LBA64 == 0. */
 
 
 #define FF_USE_TRIM		0
 /* This option switches support for ATA-TRIM. (0:Disable or 1:Enable)
-/  To enable Trim function, also CTRL_TRIM command should be implemented to the
-/  disk_ioctl() function. */
+/  To enable this feature, also CTRL_TRIM command should be implemented to
+/  the disk_ioctl(). */
 
 
 
@@ -256,7 +268,7 @@
 
 #define FF_FS_TINY		0
 /* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)
-/  At the tiny configuration, size of file object (FIL) is shrinked FF_MAX_SS bytes.
+/  At the tiny configuration, size of file object (FIL) is reduced FF_MAX_SS bytes.
 /  Instead of private sector buffer eliminated from the file object, common sector
 /  buffer in the filesystem object (FATFS) is used for the file data transfer. */
 
@@ -273,20 +285,25 @@
 #define FF_FS_NORTC		0
 #define FF_NORTC_MON	1
 #define FF_NORTC_MDAY	1
-#define FF_NORTC_YEAR	2020
-/* The option FF_FS_NORTC switches timestamp functiton. If the system does not have
-/  any RTC function or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable
-/  the timestamp function. Every object modified by FatFs will have a fixed timestamp
+#define FF_NORTC_YEAR	2025
+/* The option FF_FS_NORTC switches timestamp feature. If the system does not have
+/  an RTC or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable the
+/  timestamp feature. Every object modified by FatFs will have a fixed timestamp
 /  defined by FF_NORTC_MON, FF_NORTC_MDAY and FF_NORTC_YEAR in local time.
-/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() function need to be
-/  added to the project to read current time form real-time clock. FF_NORTC_MON,
+/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() need to be added
+/  to the project to read current time form real-time clock. FF_NORTC_MON,
 /  FF_NORTC_MDAY and FF_NORTC_YEAR have no effect.
 /  These options have no effect in read-only configuration (FF_FS_READONLY = 1). */
 
 
+#define FF_FS_CRTIME	0
+/* This option enables(1)/disables(0) the timestamp of the file created. When
+/  set 1, the file created time is available in FILINFO structure. */
+
+
 #define FF_FS_NOFSINFO	0
-/* If you need to know correct free space on the FAT32 volume, set bit 0 of this
-/  option, and f_getfree() function at first time after volume mount will force
+/* If you need to know the correct free space on the FAT32 volume, set bit 0 of
+/  this option, and f_getfree() on the first time after volume mount will force
 /  a full FAT scan. Bit 1 controls the use of last allocated cluster number.
 /
 /  bit0=0: Use free cluster count in the FSINFO if available.
@@ -323,19 +340,16 @@
 /* The option FF_FS_REENTRANT switches the re-entrancy (thread safe) of the FatFs
 /  module itself. Note that regardless of this option, file access to different
 /  volume is always re-entrant and volume control functions, f_mount(), f_mkfs()
-/  and f_fdisk() function, are always not re-entrant. Only file/directory access
-/  to the same volume is under control of this function.
+/  and f_fdisk(), are always not re-entrant. Only file/directory access to
+/  the same volume is under control of this featuer.
 /
-/   0: Disable re-entrancy. FF_FS_TIMEOUT and FF_SYNC_t have no effect.
+/   0: Disable re-entrancy. FF_FS_TIMEOUT have no effect.
 /   1: Enable re-entrancy. Also user provided synchronization handlers,
-/      ff_req_grant(), ff_rel_grant(), ff_del_syncobj() and ff_cre_syncobj()
-/      function, must be added to the project. Samples are available in
-/      option/syscall.c.
+/      ff_mutex_create(), ff_mutex_delete(), ff_mutex_take() and ff_mutex_give(),
+/      must be added to the project. Samples are available in ffsystem.c.
 /
-/  The FF_FS_TIMEOUT defines timeout period in unit of time tick.
-/  The FF_SYNC_t defines O/S dependent sync object type. e.g. HANDLE, ID, OS_EVENT*,
-/  SemaphoreHandle_t and etc. A header file for O/S definitions needs to be
-/  included somewhere in the scope of ff.h. */
+/  The FF_FS_TIMEOUT defines timeout period in unit of O/S time tick.
+*/
 
 
 

components/dfs/dfs_v2/filesystems/elmfat/00history.txt

@@ -367,3 +367,23 @@ R0.15 (November 6, 2022)
   Fixed string functions cannot write the unicode characters not in BMP when FF_LFN_UNICODE == 2 (UTF-8).
   Fixed a compatibility issue in identification of GPT header.
 
+
+
+R0.15a (November 22, 2024)
+  Fixed a complie error when FF_FS_LOCK != 0.
+  Fixed a potential issue when work FatFs concurrency with FF_FS_REENTRANT, FF_VOLUMES >= 2 and FF_FS_LOCK > 0.
+  Made f_setlabel() accept a volume label in Unix style volume ID when FF_STR_VOLUME_ID == 2.
+  Made FatFs update PercInUse field in exFAT VBR. (A preceding f_getfree() is needed for the accuracy)
+
+
+
+R0.15b (June 21, 2025)
+  Added support for timestamp of created time. (FF_FS_CRTIME)
+  Fixed FatFs fails to load the FsInfo in FAT32 volumes and the f_getfree always be forced a full FAT scan which takes a long time. (appeared at R0.15a)
+
+
+
+R0.16 (July 22, 2025)
+  Removed a long-pending limitation that f_getcwd and double-dot .. in the path name did not work on the exFAT volume.
+  Fixed f_readdir cannot detect end of directory and it leads the application process into infinite loop. (appeared at R0.15b)
+  Fixed dot names with terminating separator or duplicated separator are rejected when LFN is not enabled.

components/dfs/dfs_v2/filesystems/elmfat/00readme.txt

@@ -1,4 +1,4 @@
-FatFs Module Source Files R0.15
+FatFs Module Source Files R0.16
 
 
 FILES

components/dfs/dfs_v2/filesystems/elmfat/diskio.h

@@ -1,5 +1,5 @@
 /*-----------------------------------------------------------------------/
-/  Low level disk interface modlue include file   (C)ChaN, 2019          /
+/  Low level disk interface modlue include file   (C)ChaN, 2025          /
 /-----------------------------------------------------------------------*/
 
 #ifndef _DISKIO_DEFINED
@@ -55,7 +55,7 @@ DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
 #define CTRL_EJECT			7	/* Eject media */
 #define CTRL_FORMAT			8	/* Create physical format on the media */
 
-/* MMC/SDC specific ioctl command */
+/* MMC/SDC specific ioctl command (Not used by FatFs) */
 #define MMC_GET_TYPE		10	/* Get card type */
 #define MMC_GET_CSD			11	/* Get CSD */
 #define MMC_GET_CID			12	/* Get CID */
@@ -65,7 +65,7 @@ DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
 #define ISDIO_WRITE			56	/* Write data to SD iSDIO register */
 #define ISDIO_MRITE			57	/* Masked write data to SD iSDIO register */
 
-/* ATA/CF specific ioctl command */
+/* ATA/CF specific ioctl command (Not used by FatFs) */
 #define ATA_GET_REV			20	/* Get F/W revision */
 #define ATA_GET_MODEL		21	/* Get model name */
 #define ATA_GET_SN			22	/* Get serial number */

components/dfs/dfs_v2/filesystems/elmfat/ff.h

@@ -1,8 +1,8 @@
 /*----------------------------------------------------------------------------/
-/  FatFs - Generic FAT Filesystem module  R0.15                               /
+/  FatFs - Generic FAT Filesystem module  R0.16                               /
 /-----------------------------------------------------------------------------/
 /
-/ Copyright (C) 2022, ChaN, all right reserved.
+/ Copyright (C) 2025, ChaN, all right reserved.
 /
 / FatFs module is an open source software. Redistribution and use of FatFs in
 / source and binary forms, with or without modification, are permitted provided
@@ -20,15 +20,16 @@
 
 
 #ifndef FF_DEFINED
-#define FF_DEFINED	80286	/* Revision ID */
+#define FF_DEFINED	80386	/* Revision ID */
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 #include <rtthread.h>
+#if !defined(FFCONF_DEF)
 #include "ffconf.h"		/* FatFs configuration options */
-
+#endif
 #if FF_DEFINED != FFCONF_DEF
 #error Wrong configuration file (ffconf.h).
 #endif
@@ -49,18 +50,18 @@ typedef unsigned __int64 QWORD;
 #include <stdint.h>
 typedef unsigned int	UINT;	/* int must be 16-bit or 32-bit */
 typedef unsigned char	BYTE;	/* char must be 8-bit */
-typedef uint16_t		WORD;	/* 16-bit unsigned integer */
-typedef uint32_t		DWORD;	/* 32-bit unsigned integer */
-typedef uint64_t		QWORD;	/* 64-bit unsigned integer */
-typedef WORD			WCHAR;	/* UTF-16 character type */
+typedef uint16_t		WORD;	/* 16-bit unsigned */
+typedef uint32_t		DWORD;	/* 32-bit unsigned */
+typedef uint64_t		QWORD;	/* 64-bit unsigned */
+typedef WORD			WCHAR;	/* UTF-16 code unit */
 
 #else  	/* Earlier than C99 */
 #define FF_INTDEF 1
 typedef unsigned int	UINT;	/* int must be 16-bit or 32-bit */
 typedef unsigned char	BYTE;	/* char must be 8-bit */
-typedef unsigned short	WORD;	/* 16-bit unsigned integer */
-typedef unsigned long	DWORD;	/* 32-bit unsigned integer */
-typedef WORD			WCHAR;	/* UTF-16 character type */
+typedef unsigned short	WORD;	/* short must be 16-bit */
+typedef unsigned long	DWORD;	/* long must be 32-bit */
+typedef WORD			WCHAR;	/* UTF-16 code unit */
 #endif
 
 
@@ -114,64 +115,78 @@ typedef char TCHAR;
 
 #if FF_MULTI_PARTITION		/* Multiple partition configuration */
 typedef struct {
-	BYTE pd;	/* Physical drive number */
-	BYTE pt;	/* Partition: 0:Auto detect, 1-4:Forced partition) */
+	BYTE pd;	/* Associated physical drive */
+	BYTE pt;	/* Associated partition (0:Auto detect, 1-4:Forced partition) */
 } PARTITION;
-extern PARTITION VolToPart[];	/* Volume - Partition mapping table */
+extern PARTITION VolToPart[];	/* Volume to partition mapping table */
 #endif
 
 #if FF_STR_VOLUME_ID
 #ifndef FF_VOLUME_STRS
-extern const char* VolumeStr[FF_VOLUMES];	/* User defied volume ID */
+extern const char* VolumeStr[FF_VOLUMES];	/* User defined volume ID table */
 #endif
 #endif
 
 
+/* Current working directory structure (FFXCWDS) */
+
+#if FF_FS_EXFAT && FF_FS_RPATH
+#if FF_PATH_DEPTH < 1
+#error FF_PATH_DEPTH must not be zero
+#endif
+typedef struct {
+	DWORD	d_scl;		/* Directory start cluster (0:root dir) */
+	DWORD	d_size;		/* Size of directory (b7-b0: cluster chain status) (invalid if d_scl == 0) */
+	DWORD	nxt_ofs;	/* Offset of entry of next dir in this directory (invalid if last link) */
+} FFXCWDL;
+typedef struct {
+	UINT	depth;		/* Current directory depth (0:root dir) */
+	FFXCWDL	tbl[FF_PATH_DEPTH + 1];	/* Directory chain of current working directory path */
+} FFXCWDS;
+#endif
+
 
 /* Filesystem object structure (FATFS) */
 
 typedef struct {
-	BYTE	fs_type;		/* Filesystem type (0:not mounted) */
-	BYTE	pdrv;			/* Volume hosting physical drive */
-	BYTE	ldrv;			/* Logical drive number (used only when FF_FS_REENTRANT) */
-	BYTE	n_fats;			/* Number of FATs (1 or 2) */
-	BYTE	wflag;			/* win[] status (b0:dirty) */
-	BYTE	fsi_flag;		/* FSINFO status (b7:disabled, b0:dirty) */
-	WORD	id;				/* Volume mount ID */
-	WORD	n_rootdir;		/* Number of root directory entries (FAT12/16) */
-	WORD	csize;			/* Cluster size [sectors] */
+	BYTE	fs_type;	/* Filesystem type (0:not mounted) */
+	BYTE	pdrv;		/* Physical drive that holds this volume */
+	BYTE	ldrv;		/* Logical drive number (used only when FF_FS_REENTRANT) */
+	BYTE	n_fats;		/* Number of FATs (1 or 2) */
+	BYTE	wflag;		/* win[] status (b0:dirty) */
+	BYTE	fsi_flag;	/* Allocation information control (b7:disabled, b0:dirty) */
+	WORD	id;			/* Volume mount ID */
+	WORD	n_rootdir;	/* Number of root directory entries (FAT12/16) */
+	WORD	csize;		/* Cluster size [sectors] */
 #if FF_MAX_SS != FF_MIN_SS
-	WORD	ssize;			/* Sector size (512, 1024, 2048 or 4096) */
+	WORD	ssize;		/* Sector size (512, 1024, 2048 or 4096) */
 #endif
 #if FF_USE_LFN
-	WCHAR*	lfnbuf;			/* LFN working buffer */
-#endif
-#if FF_FS_EXFAT
-	BYTE*	dirbuf;			/* Directory entry block scratchpad buffer for exFAT */
+	WCHAR*	lfnbuf;		/* Pointer to LFN working buffer */
 #endif
 #if !FF_FS_READONLY
-	DWORD	last_clst;		/* Last allocated cluster */
-	DWORD	free_clst;		/* Number of free clusters */
+	DWORD	last_clst;	/* Last allocated cluster (invalid if >=n_fatent) */
+	DWORD	free_clst;	/* Number of free clusters (invalid if >=fs->n_fatent-2) */
 #endif
 #if FF_FS_RPATH
-	DWORD	cdir;			/* Current directory start cluster (0:root) */
+	DWORD	cdir;		/* Current directory start cluster (0:root) */
+#endif
+	DWORD	n_fatent;	/* Number of FAT entries (number of clusters + 2) */
+	DWORD	fsize;		/* Number of sectors per FAT */
+	LBA_t	winsect;	/* Current sector appearing in the win[] */
+	LBA_t	volbase;	/* Volume base sector */
+	LBA_t	fatbase;	/* FAT base sector */
+	LBA_t	dirbase;	/* Root directory base sector (FAT12/16) or cluster (FAT32/exFAT) */
+	LBA_t	database;	/* Data base sector */
 #if FF_FS_EXFAT
-	DWORD	cdc_scl;		/* Containing directory start cluster (invalid when cdir is 0) */
-	DWORD	cdc_size;		/* b31-b8:Size of containing directory, b7-b0: Chain status */
-	DWORD	cdc_ofs;		/* Offset in the containing directory (invalid when cdir is 0) */
+	LBA_t	bitbase;	/* Allocation bitmap base sector */
+	BYTE*	dirbuf;		/* Pointer to directory entry block buffer */
+#if FF_FS_RPATH
+	FFXCWDS	xcwds;		/* Crrent working directory structure */
+	FFXCWDS	xcwds2;		/* Working buffer to follow the path */
 #endif
 #endif
-	DWORD	n_fatent;		/* Number of FAT entries (number of clusters + 2) */
-	DWORD	fsize;			/* Number of sectors per FAT */
-	LBA_t	volbase;		/* Volume base sector */
-	LBA_t	fatbase;		/* FAT base sector */
-	LBA_t	dirbase;		/* Root directory base sector (FAT12/16) or cluster (FAT32/exFAT) */
-	LBA_t	database;		/* Data base sector */
-#if FF_FS_EXFAT
-	LBA_t	bitbase;		/* Allocation bitmap base sector */
-#endif
-	LBA_t	winsect;		/* Current sector appearing in the win[] */
-	BYTE	win[FF_MAX_SS];	/* Disk access window for Directory, FAT (and file data at tiny cfg) */
+	BYTE	win[FF_MAX_SS];	/* Disk access window for directory, FAT (and file data in tiny cfg) */
 } FATFS;
 
 
@@ -179,21 +194,21 @@ typedef struct {
 /* Object ID and allocation information (FFOBJID) */
 
 typedef struct {
-	FATFS*	fs;				/* Pointer to the hosting volume of this object */
-	WORD	id;				/* Hosting volume's mount ID */
-	BYTE	attr;			/* Object attribute */
-	BYTE	stat;			/* Object chain status (b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session, b2:sub-directory stretched) */
-	DWORD	sclust;			/* Object data start cluster (0:no cluster or root directory) */
-	FSIZE_t	objsize;		/* Object size (valid when sclust != 0) */
+	FATFS*	fs;			/* Pointer to the volume holding this object */
+	WORD	id;			/* Volume mount ID when this object was opened */
+	BYTE	attr;		/* Object attribute */
+	BYTE	stat;		/* Object chain status (exFAT: b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session, b2:sub-directory stretched) */
+	DWORD	sclust;		/* Object data cluster (0:no data or root directory) */
+	FSIZE_t	objsize;	/* Object size (valid when sclust != 0) */
 #if FF_FS_EXFAT
-	DWORD	n_cont;			/* Size of first fragment - 1 (valid when stat == 3) */
-	DWORD	n_frag;			/* Size of last fragment needs to be written to FAT (valid when not zero) */
-	DWORD	c_scl;			/* Containing directory start cluster (valid when sclust != 0) */
-	DWORD	c_size;			/* b31-b8:Size of containing directory, b7-b0: Chain status (valid when c_scl != 0) */
-	DWORD	c_ofs;			/* Offset in the containing directory (valid when file object and sclust != 0) */
+	DWORD	n_cont;		/* Size of first fragment - 1 (valid when stat == 3) */
+	DWORD	n_frag;		/* Size of last fragment needs to be written to FAT (valid when not zero) */
+	DWORD	c_scl;		/* Cluster of directory holding this object (valid when sclust != 0) */
+	DWORD	c_size;		/* Size of directory holding this object (b7-b0: allocation status, valid when c_scl != 0) */
+	DWORD	c_ofs;		/* Offset of entry in the holding directory */
 #endif
 #if FF_FS_LOCK
-	UINT	lockid;			/* File lock ID origin from 1 (index of file semaphore table Files[]) */
+	UINT	lockid;		/* File lock ID origin from 1 (index of file semaphore table Files[]) */
 #endif
 } FFOBJID;
 
@@ -202,18 +217,18 @@ typedef struct {
 /* File object structure (FIL) */
 
 typedef struct {
-	FFOBJID	obj;			/* Object identifier (must be the 1st member to detect invalid object pointer) */
-	BYTE	flag;			/* File status flags */
-	BYTE	err;			/* Abort flag (error code) */
-	FSIZE_t	fptr;			/* File read/write pointer (Zeroed on file open) */
-	DWORD	clust;			/* Current cluster of fpter (invalid when fptr is 0) */
-	LBA_t	sect;			/* Sector number appearing in buf[] (0:invalid) */
+	FFOBJID	obj;		/* Object identifier (must be the 1st member to detect invalid object pointer) */
+	BYTE	flag;		/* File status flags */
+	BYTE	err;		/* Abort flag (error code) */
+	FSIZE_t	fptr;		/* File read/write pointer (0 on open) */
+	DWORD	clust;		/* Current cluster of fptr (invalid when fptr is 0) */
+	LBA_t	sect;		/* Sector number appearing in buf[] (0:invalid) */
 #if !FF_FS_READONLY
-	LBA_t	dir_sect;		/* Sector number containing the directory entry (not used at exFAT) */
-	BYTE*	dir_ptr;		/* Pointer to the directory entry in the win[] (not used at exFAT) */
+	LBA_t	dir_sect;	/* Sector number containing the directory entry (not used in exFAT) */
+	BYTE*	dir_ptr;	/* Pointer to the directory entry in the win[] (not used in exFAT) */
 #endif
 #if FF_USE_FASTSEEK
-	DWORD*	cltbl;			/* Pointer to the cluster link map table (nulled on open, set by application) */
+	DWORD*	cltbl;		/* Pointer to the cluster link map table (nulled on open; set by application) */
 #endif
 #if !FF_FS_TINY
 	BYTE	buf[FF_MAX_SS];	/* File private data read/write window */
@@ -225,40 +240,44 @@ typedef struct {
 /* Directory object structure (DIR) */
 
 typedef struct {
-	FFOBJID	obj;			/* Object identifier */
-	DWORD	dptr;			/* Current read/write offset */
-	DWORD	clust;			/* Current cluster */
-	LBA_t	sect;			/* Current sector (0:Read operation has terminated) */
-	BYTE*	dir;			/* Pointer to the directory item in the win[] */
-	BYTE	fn[12];			/* SFN (in/out) {body[8],ext[3],status[1]} */
+	FFOBJID	obj;		/* Object identifier (must be the 1st member to detect invalid object pointer) */
+	DWORD	dptr;		/* Current read/write offset */
+	DWORD	clust;		/* Current cluster */
+	LBA_t	sect;		/* Current sector (0:no more item to read) */
+	BYTE*	dir;		/* Pointer to the directory item in the win[] in filesystem object */
+	BYTE	fn[12];		/* SFN (in/out) {body[0-7],ext[8-10],status[11]} */
 #if FF_USE_LFN
-	DWORD	blk_ofs;		/* Offset of current entry block being processed (0xFFFFFFFF:Invalid) */
+	DWORD	blk_ofs;	/* Offset of current entry block being processed (0xFFFFFFFF:invalid) */
 #endif
 #if FF_USE_FIND
-	const TCHAR* pat;		/* Pointer to the name matching pattern */
+	const TCHAR *pat;	/* Pointer to the name matching pattern */
 #endif
 } DIR;
 
 
 
-/* File information structure (FILINFO) */
+/* File/directory information structure (FILINFO) */
 
 typedef struct {
-	FSIZE_t	fsize;			/* File size */
-	WORD	fdate;			/* Modified date */
-	WORD	ftime;			/* Modified time */
-	BYTE	fattrib;		/* File attribute */
+	FSIZE_t	fsize;			/* File size (invalid for directory) */
+	WORD	fdate;			/* Date of file modification or directory creation */
+	WORD	ftime;			/* Time of file modification or directory creation */
+#if FF_FS_CRTIME
+	WORD	crdate;			/* Date of object createion */
+	WORD	crtime;			/* Time of object createion */
+#endif
+	BYTE	fattrib;		/* Object attribute */
 #if FF_USE_LFN
-	TCHAR	altname[FF_SFN_BUF + 1];/* Alternative file name */
-	TCHAR	fname[FF_LFN_BUF + 1];	/* Primary file name */
+	TCHAR	altname[FF_SFN_BUF + 1];/* Alternative object name */
+	TCHAR	fname[FF_LFN_BUF + 1];	/* Primary object name */
 #else
-	TCHAR	fname[12 + 1];	/* File name */
+	TCHAR	fname[12 + 1];	/* Object name */
 #endif
 } FILINFO;
 
 
 
-/* Format parameter structure (MKFS_PARM) */
+/* Format parameter structure (MKFS_PARM) used for f_mkfs() */
 
 typedef struct {
 	BYTE fmt;			/* Format option (FM_FAT, FM_FAT32, FM_EXFAT and FM_SFD) */
@@ -273,24 +292,24 @@ typedef struct {
 /* File function return code (FRESULT) */
 
 typedef enum {
-	FR_OK = 0,				/* (0) Succeeded */
+	FR_OK = 0,				/* (0) Function succeeded */
 	FR_DISK_ERR,			/* (1) A hard error occurred in the low level disk I/O layer */
 	FR_INT_ERR,				/* (2) Assertion failed */
-	FR_NOT_READY,			/* (3) The physical drive cannot work */
+	FR_NOT_READY,			/* (3) The physical drive does not work */
 	FR_NO_FILE,				/* (4) Could not find the file */
 	FR_NO_PATH,				/* (5) Could not find the path */
 	FR_INVALID_NAME,		/* (6) The path name format is invalid */
-	FR_DENIED,				/* (7) Access denied due to prohibited access or directory full */
-	FR_EXIST,				/* (8) Access denied due to prohibited access */
+	FR_DENIED,				/* (7) Access denied due to a prohibited access or directory full */
+	FR_EXIST,				/* (8) Access denied due to a prohibited access */
 	FR_INVALID_OBJECT,		/* (9) The file/directory object is invalid */
 	FR_WRITE_PROTECTED,		/* (10) The physical drive is write protected */
 	FR_INVALID_DRIVE,		/* (11) The logical drive number is invalid */
 	FR_NOT_ENABLED,			/* (12) The volume has no work area */
-	FR_NO_FILESYSTEM,		/* (13) There is no valid FAT volume */
-	FR_MKFS_ABORTED,		/* (14) The f_mkfs() aborted due to any problem */
-	FR_TIMEOUT,				/* (15) Could not get a grant to access the volume within defined period */
+	FR_NO_FILESYSTEM,		/* (13) Could not find a valid FAT volume */
+	FR_MKFS_ABORTED,		/* (14) The f_mkfs function aborted due to some problem */
+	FR_TIMEOUT,				/* (15) Could not take control of the volume within defined period */
 	FR_LOCKED,				/* (16) The operation is rejected according to the file sharing policy */
-	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated */
+	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated, given buffer size is insufficient or too deep path */
 	FR_TOO_MANY_OPEN_FILES,	/* (18) Number of open files > FF_FS_LOCK */
 	FR_INVALID_PARAMETER	/* (19) Given parameter is invalid */
 } FRESULT;
@@ -377,7 +396,7 @@ DWORD ff_wtoupper (DWORD uni);			/* Unicode upper-case conversion */
 void* ff_memalloc (UINT msize);		/* Allocate memory block */
 void ff_memfree (void* mblock);		/* Free memory block */
 #endif
-#if FF_FS_REENTRANT	/* Sync functions */
+#if FF_FS_REENTRANT		/* Sync functions */
 int ff_mutex_create (int vol);		/* Create a sync object */
 void ff_mutex_delete (int vol);		/* Delete a sync object */
 int ff_mutex_take (int vol);		/* Lock sync object */
@@ -391,7 +410,7 @@ void ff_mutex_give (int vol);		/* Unlock sync object */
 /* Flags and Offset Address                                     */
 /*--------------------------------------------------------------*/
 
-/* File access mode and open method flags (3rd argument of f_open) */
+/* File access mode and open method flags (3rd argument of f_open function) */
 #define	FA_READ				0x01
 #define	FA_WRITE			0x02
 #define	FA_OPEN_EXISTING	0x00
@@ -400,10 +419,10 @@ void ff_mutex_give (int vol);		/* Unlock sync object */
 #define	FA_OPEN_ALWAYS		0x10
 #define	FA_OPEN_APPEND		0x30
 
-/* Fast seek controls (2nd argument of f_lseek) */
+/* Fast seek controls (2nd argument of f_lseek function) */
 #define CREATE_LINKMAP	((FSIZE_t)0 - 1)
 
-/* Format options (2nd argument of f_mkfs) */
+/* Format options (2nd argument of f_mkfs function) */
 #define FM_FAT		0x01
 #define FM_FAT32	0x02
 #define FM_EXFAT	0x04

components/dfs/dfs_v2/filesystems/elmfat/ffconf.h

@@ -2,7 +2,7 @@
 /  Configurations of FatFs Module
 /---------------------------------------------------------------------------*/
 
-#define FFCONF_DEF	80286	/* Revision ID */
+#define FFCONF_DEF	80386	/* Revision ID */
 
 /*---------------------------------------------------------------------------/
 / Function Configurations
@@ -31,36 +31,36 @@
 
 
 #define FF_USE_MKFS		1
-/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */
+/* This option switches f_mkfs(). (0:Disable or 1:Enable) */
 
 
 #define FF_USE_FASTSEEK	1
-/* This option switches fast seek function. (0:Disable or 1:Enable) */
+/* This option switches fast seek feature. (0:Disable or 1:Enable) */
 
 
 #define FF_USE_EXPAND	0
-/* This option switches f_expand function. (0:Disable or 1:Enable) */
+/* This option switches f_expand(). (0:Disable or 1:Enable) */
 
 
 #define FF_USE_CHMOD	0
-/* This option switches attribute manipulation functions, f_chmod() and f_utime().
+/* This option switches attribute control API functions, f_chmod() and f_utime().
 /  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */
 
 
 #define FF_USE_LABEL	0
-/* This option switches volume label functions, f_getlabel() and f_setlabel().
+/* This option switches volume label API functions, f_getlabel() and f_setlabel().
 /  (0:Disable or 1:Enable) */
 
 
 #define FF_USE_FORWARD	0
-/* This option switches f_forward() function. (0:Disable or 1:Enable) */
+/* This option switches f_forward(). (0:Disable or 1:Enable) */
 
 
 #define FF_USE_STRFUNC	0
 #define FF_PRINT_LLI	0
 #define FF_PRINT_FLOAT	0
 #define FF_STRF_ENCODE	3
-/* FF_USE_STRFUNC switches string functions, f_gets(), f_putc(), f_puts() and
+/* FF_USE_STRFUNC switches string API functions, f_gets(), f_putc(), f_puts() and
 /  f_printf().
 /
 /   0: Disable. FF_PRINT_LLI, FF_PRINT_FLOAT and FF_STRF_ENCODE have no effect.
@@ -69,7 +69,7 @@
 /
 /  FF_PRINT_LLI = 1 makes f_printf() support long long argument and FF_PRINT_FLOAT = 1/2
 /  makes f_printf() support floating point argument. These features want C99 or later.
-/  When FF_LFN_UNICODE >= 1 with LFN enabled, string functions convert the character
+/  When FF_LFN_UNICODE >= 1 with LFN enabled, string API functions convert the character
 /  encoding in it. FF_STRF_ENCODE selects assumption of character encoding ON THE FILE
 /  to be read/written via those functions.
 /
@@ -127,15 +127,15 @@
 /* The FF_USE_LFN switches the support for LFN (long file name).
 /
 /   0: Disable LFN. FF_MAX_LFN has no effect.
-/   1: Enable LFN with static  working buffer on the BSS. Always NOT thread-safe.
+/   1: Enable LFN with static working buffer on the BSS. Always NOT thread-safe.
 /   2: Enable LFN with dynamic working buffer on the STACK.
 /   3: Enable LFN with dynamic working buffer on the HEAP.
 /
-/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN function
+/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN feature
 /  requiers certain internal working buffer occupies (FF_MAX_LFN + 1) * 2 bytes and
 /  additional (FF_MAX_LFN + 44) / 15 * 32 bytes when exFAT is enabled.
 /  The FF_MAX_LFN defines size of the working buffer in UTF-16 code unit and it can
-/  be in range of 12 to 255. It is recommended to be set it 255 to fully support LFN
+/  be in range of 12 to 255. It is recommended to be set 255 to fully support the LFN
 /  specification.
 /  When use stack for the working buffer, take care on stack overflow. When use heap
 /  memory for the working buffer, memory management functions, ff_memalloc() and
@@ -176,14 +176,26 @@
 
 
 #define FF_FS_RPATH		0
-/* This option configures support for relative path.
+/* This option configures support for relative path feature.
 /
-/   0: Disable relative path and remove related functions.
-/   1: Enable relative path. f_chdir() and f_chdrive() are available.
-/   2: f_getcwd() function is available in addition to 1.
+/   0: Disable relative path and remove related API functions.
+/   1: Enable relative path and dot names. f_chdir() and f_chdrive() are available.
+/   2: f_getcwd() is available in addition to 1.
 */
 
 
+#define FF_PATH_DEPTH	10
+/*  This option defines maximum depth of directory in the exFAT volume. It is NOT
+/   relevant to FAT/FAT32 volume.
+/   For example, FF_PATH_DEPTH = 3 will able to follow a path "/dir1/dir2/dir3/file"
+/   but a sub-directory in the dir3 will not able to be followed and set current
+/   directory.
+/   The size of filesystem object (FATFS) increases FF_PATH_DEPTH * 24 bytes.
+/   When FF_FS_EXFAT == 0 or FF_FS_RPATH == 0, this option has no effect.
+*/
+
+
+
 /*---------------------------------------------------------------------------/
 / Drive/Volume Configurations
 /---------------------------------------------------------------------------*/
@@ -201,7 +213,7 @@
 /* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
 /  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
 /  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each
-/  logical drives. Number of items must not be less than FF_VOLUMES. Valid
+/  logical drive. Number of items must not be less than FF_VOLUMES. Valid
 /  characters for the volume ID strings are A-Z, a-z and 0-9, however, they are
 /  compared in case-insensitive. If FF_STR_VOLUME_ID >= 1 and FF_VOLUME_STRS is
 /  not defined, a user defined volume string table is needed as:
@@ -214,9 +226,9 @@
 /* This option switches support for multiple volumes on the physical drive.
 /  By default (0), each logical drive number is bound to the same physical drive
 /  number and only an FAT volume found on the physical drive will be mounted.
-/  When this function is enabled (1), each logical drive number can be bound to
+/  When this feature is enabled (1), each logical drive number can be bound to
 /  arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()
-/  function will be available. */
+/  will be available. */
 
 
 #define FF_MIN_SS		512
@@ -228,8 +240,8 @@
 /* This set of options configures the range of sector size to be supported. (512,
 /  1024, 2048 or 4096) Always set both 512 for most systems, generic memory card and
 /  harddisk, but a larger value may be required for on-board flash memory and some
-/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is configured
-/  for variable sector size mode and disk_ioctl() function needs to implement
+/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is
+/  configured for variable sector size mode and disk_ioctl() needs to implement
 /  GET_SECTOR_SIZE command. */
 
 
@@ -239,14 +251,14 @@
 
 
 #define FF_MIN_GPT		0x10000000
-/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs and
-/  f_fdisk function. 0x100000000 max. This option has no effect when FF_LBA64 == 0. */
+/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs() and 
+/  f_fdisk(). 2^32 sectors maximum. This option has no effect when FF_LBA64 == 0. */
 
 
 #define FF_USE_TRIM		0
 /* This option switches support for ATA-TRIM. (0:Disable or 1:Enable)
-/  To enable Trim function, also CTRL_TRIM command should be implemented to the
-/  disk_ioctl() function. */
+/  To enable this feature, also CTRL_TRIM command should be implemented to
+/  the disk_ioctl(). */
 
 
 
@@ -256,7 +268,7 @@
 
 #define FF_FS_TINY		0
 /* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)
-/  At the tiny configuration, size of file object (FIL) is shrinked FF_MAX_SS bytes.
+/  At the tiny configuration, size of file object (FIL) is reduced FF_MAX_SS bytes.
 /  Instead of private sector buffer eliminated from the file object, common sector
 /  buffer in the filesystem object (FATFS) is used for the file data transfer. */
 
@@ -273,20 +285,25 @@
 #define FF_FS_NORTC		0
 #define FF_NORTC_MON	1
 #define FF_NORTC_MDAY	1
-#define FF_NORTC_YEAR	2022
+#define FF_NORTC_YEAR	2025
 /* The option FF_FS_NORTC switches timestamp feature. If the system does not have
 /  an RTC or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable the
 /  timestamp feature. Every object modified by FatFs will have a fixed timestamp
 /  defined by FF_NORTC_MON, FF_NORTC_MDAY and FF_NORTC_YEAR in local time.
-/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() function need to be
-/  added to the project to read current time form real-time clock. FF_NORTC_MON,
+/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() need to be added
+/  to the project to read current time form real-time clock. FF_NORTC_MON,
 /  FF_NORTC_MDAY and FF_NORTC_YEAR have no effect.
 /  These options have no effect in read-only configuration (FF_FS_READONLY = 1). */
 
 
+#define FF_FS_CRTIME	0
+/* This option enables(1)/disables(0) the timestamp of the file created. When
+/  set 1, the file created time is available in FILINFO structure. */
+
+
 #define FF_FS_NOFSINFO	0
-/* If you need to know correct free space on the FAT32 volume, set bit 0 of this
-/  option, and f_getfree() function at the first time after volume mount will force
+/* If you need to know the correct free space on the FAT32 volume, set bit 0 of
+/  this option, and f_getfree() on the first time after volume mount will force
 /  a full FAT scan. Bit 1 controls the use of last allocated cluster number.
 /
 /  bit0=0: Use free cluster count in the FSINFO if available.
@@ -323,13 +340,13 @@
 /* The option FF_FS_REENTRANT switches the re-entrancy (thread safe) of the FatFs
 /  module itself. Note that regardless of this option, file access to different
 /  volume is always re-entrant and volume control functions, f_mount(), f_mkfs()
-/  and f_fdisk() function, are always not re-entrant. Only file/directory access
-/  to the same volume is under control of this featuer.
+/  and f_fdisk(), are always not re-entrant. Only file/directory access to
+/  the same volume is under control of this featuer.
 /
 /   0: Disable re-entrancy. FF_FS_TIMEOUT have no effect.
 /   1: Enable re-entrancy. Also user provided synchronization handlers,
-/      ff_mutex_create(), ff_mutex_delete(), ff_mutex_take() and ff_mutex_give()
-/      function, must be added to the project. Samples are available in ffsystem.c.
+/      ff_mutex_create(), ff_mutex_delete(), ff_mutex_take() and ff_mutex_give(),
+/      must be added to the project. Samples are available in ffsystem.c.
 /
 /  The FF_FS_TIMEOUT defines timeout period in unit of O/S time tick.
 */