EXFAT 1.2.5 merged with Samsung Source 1.2.4 and modded, READ MORE be…

…low.

Driver modded to work with 3.0.y up to 3.10.y

+ all recent fixes and guide how to add to kernel.

I will be happy to add any other fixes to this driver.

RXRZ passed ownership of the source to me.

Kconfig

@@ -0,0 +1,19 @@
+config EXFAT_FS
+	tristate "exFAT filesystem support"
+	select NLS
+	help
+	  exFAT driver from Samsung
+
+config EXFAT_DEFAULT_CODEPAGE
+	int "Default codepage for exFAT"
+	depends on EXFAT_FS
+	default 437
+	help
+	  This option should be set to the codepage of your exFAT filesystems.
+
+config EXFAT_DEFAULT_IOCHARSET
+	string "Default iocharset for exFAT"
+	depends on EXFAT_FS
+	default "utf8"
+	help
+	  Set this to the default input/output character set you'd like exFAT to use.

Makefile

@@ -1,26 +1,4 @@
-# Exfat Linux kernel modules
-#
-
-obj-m += exfat.o
+obj-$(CONFIG_EXFAT_FS) += exfat.o
 
 exfat-y := exfat_core.o exfat_api.o exfat_blkdev.o exfat_cache.o exfat_super.o \
-   		   exfat_data.o exfat_global.o exfat_nls.o exfat_oal.o exfat_upcase.o
-
-EXTRA_FLAGS += -I$(PWD)
-
-#KDIR	:= /usr/src/linux/
-KDIR	:= /lib/modules/$(shell uname -r)/build
-PWD		:= $(shell pwd)
-
-all:
-	$(MAKE) -C $(KDIR) M=$(PWD) modules
-
-clean:
-	$(MAKE) -C $(KDIR) M=$(PWD) clean
-
-help:
-	$(MAKE) -C $(KDIR) M=$(PWD) help
-
-.PHONY : install
-install : all
-	sudo $(MAKE) -C $(KDIR) M=$(PWD) modules_install; sudo depmod
+	   exfat_data.o exfat_global.o exfat_nls.o exfat_oal.o exfat_upcase.o

README.md

@@ -1,25 +1,55 @@
-exfat-nofuse
-============
-
-Linux non-fuse read/write kernel driver for the exFAT file system.<br />
-Originally ported from android kernel v3.0.
-
-
-Kudos to ksv1986 for the mutex patch!<br />
-Thanks to JackNorris for being awesome and providing the clear_inode() patch.<br />
-<br />
-Big thanks to lqs for completing the driver!
-
-
-Special thanks to github user AndreiLux for spreading the word about the leak!<br />
-
-
-Installation:
-> make<br />
-> make install
-
-To load the driver manually, run this as root:
-> modprobe exfat
-
-
-Free Software for the Free Minds!
+exfat-nofuse
+============
+
+Linux non-fuse read/write kernel driver for the exFAT file system.<br />
+Originally ported from android kernel v3.0.
+
+
+Kudos to ksv1986 for the mutex patch!<br />
+Thanks to JackNorris for being awesome and providing the clear_inode() patch.<br />
+<br />
+Big thanks to lqs for completing the driver!
+
+
+Special thanks to github user AndreiLux for spreading the word about the leak!<br />
+
+To load the driver manually, run this as root:
+> modprobe exfat
+
+
+Free Software for the Free Minds!
+=====================================
+
+To add to kernel you need to do this:
+
+cd your kernel source dir
+
+mkdir fs/exfat
+
+copy all files (exept .git) from exfat-nofuse to your kernel source fs/exfat/
+
+see
+https://github.com/dorimanx/Dorimanx-SG2-I9100-Kernel/commit/e8fc728a68096db9ffcebff40244ebfb60a3de18
+
+edit fs/Kconfig
+edit fs/Makefile
+
+cd your kernel source
+make menuconfig
+
+go to: File systems > DOS/FAT/NT > check the exfat as MODULE (M)
+<M> exFAT filesystem support
+(437) Default codepage for exFAT
+(utf8) Default iocharset for exFAT
+
+ESC to main menu
+Save an Alternate Configuration File
+ESC ESC
+
+build your kernel.
+
+and you will have new module!
+
+exfat.ko
+
+have fun.

exfat.h

@@ -1,3 +1,21 @@
+/*
+ *  Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
 /************************************************************************/
 /*                                                                      */
 /*  PROJECT : exFAT & FAT12/16/32 File System                           */
@@ -510,7 +528,7 @@ extern "C" {
 	INT32 ffsCreateFile(struct inode *inode, UINT8 *path, UINT8 mode, FILE_ID_T *fid);
 	INT32 ffsReadFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *rcount);
 	INT32 ffsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *wcount);
-	INT32 ffsTruncateFile(struct inode *inode, UINT64 new_size);
+	INT32 ffsTruncateFile(struct inode *inode, UINT64 old_size, UINT64 new_size);
 	INT32 ffsMoveFile(struct inode *old_parent_inode, FILE_ID_T *fid, struct inode *new_parent_inode, struct dentry *new_dentry);
 	INT32 ffsRemoveFile(struct inode *inode, FILE_ID_T *fid);
 	INT32 ffsSetAttr(struct inode *inode, UINT32 attr);

exfat_api.c

@@ -1,3 +1,21 @@
+/*
+ *  Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
 /************************************************************************/
 /*                                                                      */
 /*  PROJECT : exFAT & FAT12/16/32 File System                           */
@@ -287,24 +305,24 @@ INT32 FsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 coun
 } /* end of FsWriteFile */
 
 /* FsTruncateFile : resize the file length */
-INT32 FsTruncateFile(struct inode *inode, UINT64 new_size)
+INT32 FsTruncateFile(struct inode *inode, UINT64 old_size, UINT64 new_size)
 {
 	INT32 err;
 	struct super_block *sb = inode->i_sb;
 	FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
 
-	PRINTK("FsTruncateFile entered (inode %p size %llu\n", inode, new_size);
-
 	/* acquire the lock for file system critical section */
 	sm_P(&(fs_struct[p_fs->drv].v_sem));
 
-	err = ffsTruncateFile(inode, new_size);
+	PRINTK("FsTruncateFile entered (inode %p size %llu)\n", inode, new_size);
 
-	/* release the lock for file system critical section */
-	sm_V(&(fs_struct[p_fs->drv].v_sem));
+	err = ffsTruncateFile(inode, old_size, new_size);
 
 	PRINTK("FsTruncateFile exitted (%d)\n", err);
 
+	/* release the lock for file system critical section */
+	sm_V(&(fs_struct[p_fs->drv].v_sem));
+
 	return(err);
 } /* end of FsTruncateFile */
 

exfat_api.h

@@ -1,3 +1,21 @@
+/*
+ *  Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
 /************************************************************************/
 /*                                                                      */
 /*  PROJECT : exFAT & FAT12/16/32 File System                           */
@@ -173,7 +191,7 @@ extern "C" {
 	INT32 FsCreateFile(struct inode *inode, UINT8 *path, UINT8 mode, FILE_ID_T *fid);
 	INT32 FsReadFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *rcount);
 	INT32 FsWriteFile(struct inode *inode, FILE_ID_T *fid, void *buffer, UINT64 count, UINT64 *wcount);
-	INT32 FsTruncateFile(struct inode *inode, UINT64 new_size);
+	INT32 FsTruncateFile(struct inode *inode, UINT64 old_size, UINT64 new_size);
 	INT32 FsMoveFile(struct inode *old_parent_inode, FILE_ID_T *fid, struct inode *new_parent_inode, struct dentry *new_dentry);
 	INT32 FsRemoveFile(struct inode *inode, FILE_ID_T *fid);
 	INT32 FsSetAttr(struct inode *inode, UINT32 attr);

exfat_blkdev.c

@@ -1,3 +1,21 @@
+/*
+ *  Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
 /************************************************************************/
 /*                                                                      */
 /*  PROJECT : exFAT & FAT12/16/32 File System                           */
@@ -41,7 +59,7 @@
 
 INT32 bdev_init(void)
 {
-  return(FFS_SUCCESS);
+	return(FFS_SUCCESS);
 }
 
 INT32 bdev_shutdown(void)
@@ -78,6 +96,7 @@ INT32 bdev_close(struct super_block *sb)
 INT32 bdev_read(struct super_block *sb, UINT32 secno, struct buffer_head **bh, UINT32 num_secs, INT32 read)
 {
 	BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info);
+	FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
 #if EXFAT_CONFIG_KERNEL_DEBUG
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
 	long flags = sbi->debug_flags;
@@ -96,7 +115,8 @@ INT32 bdev_read(struct super_block *sb, UINT32 secno, struct buffer_head **bh, U
 
 	if (*bh) return(FFS_SUCCESS);
 
-	WARN_ONCE(1, "EXFAT: Out of memory\n");
+	WARN(!p_fs->dev_ejected,
+		"[EXFAT] No bh, device seems wrong or to be ejected.\n");
 
 	return(FFS_MEDIAERR);
 }
@@ -106,6 +126,7 @@ INT32 bdev_write(struct super_block *sb, UINT32 secno, struct buffer_head *bh, U
 	INT32 count;
 	struct buffer_head *bh2;
 	BD_INFO_T *p_bd = &(EXFAT_SB(sb)->bd_info);
+	FS_INFO_T *p_fs = &(EXFAT_SB(sb)->fs_info);
 #if EXFAT_CONFIG_KERNEL_DEBUG
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
 	long flags = sbi->debug_flags;
@@ -128,7 +149,7 @@ INT32 bdev_write(struct super_block *sb, UINT32 secno, struct buffer_head *bh, U
 		bh2 = __getblk(sb->s_bdev, secno, count);
 
 		if (bh2 == NULL)
-			return (FFS_MEDIAERR);
+			goto no_bh;
 
 		lock_buffer(bh2);
 		MEMCPY(bh2->b_data, bh->b_data, count);
@@ -137,12 +158,18 @@ INT32 bdev_write(struct super_block *sb, UINT32 secno, struct buffer_head *bh, U
 		unlock_buffer(bh2);
 		if (sync && (sync_dirty_buffer(bh2) != 0)) {
 			__brelse(bh2);
-			return (FFS_MEDIAERR);
+			goto no_bh;
 		}
 		__brelse(bh2);
 	}
 
 	return(FFS_SUCCESS);
+
+no_bh:
+	WARN(!p_fs->dev_ejected,
+		"[EXFAT] No bh, device seems wrong or to be ejected.\n");
+
+	return (FFS_MEDIAERR);
 }
 
 INT32 bdev_sync(struct super_block *sb)

exfat_blkdev.h

@@ -1,3 +1,21 @@
+/*
+ *  Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
 /************************************************************************/
 /*                                                                      */
 /*  PROJECT : exFAT & FAT12/16/32 File System                           */