Big patchset to exFAT version v1.2.24-dragon

Linux non-fuse read/write kernel driver for exFat and vFat file systems

remote https://github.com/AndyLavr/exfat-nofuse
branch exfat-v1.2.24-dragon

 - Full adaptation to Kernel 4.19.y

 - Support exFat capacity more than 2TB


Signed-off-by: Andy Lavr <andy.lavr@gmail.com>

Kconfig

@@ -1,26 +1,33 @@
 config EXFAT_FS
 	tristate "exFAT fs support"
+	default m
 	select NLS
+	select NLS_UTF8
+	select NLS_CODEPAGE_437
+	select NLS_ISO8859_1
 	help
-	  This adds support for the exFAT file system.
+	  If you want to use the exFAT file systems, then you must say Y or M here
+	  to inlucde exFAT support.
 
-config EXFAT_DISCARD
-	bool "enable discard support"
-	depends on EXFAT_FS
+config EXFAT_USE_FOR_VFAT
+	bool "Register exFAT as VFAT"
 	default y
+	depends on EXFAT_FS && !VFAT_FS
+	help
+	  If you want to register exFAT as available for VFAT, say Y.
 
-config EXFAT_DELAYED_SYNC
-	bool "enable delayed sync"
+config EXFAT_DISCARD
+	bool "Enable discard support"
 	depends on EXFAT_FS
-	default n
+	default y
 
 config EXFAT_KERNEL_DEBUG
-	bool "enable kernel debug features via ioctl"
+	bool "Enable kernel debug features via ioctl"
 	depends on EXFAT_FS
 	default n
 
 config EXFAT_DEBUG_MSG
-	bool "print debug messages"
+	bool "Print debug messages"
 	depends on EXFAT_FS
 	default n
 
@@ -37,3 +44,22 @@ config EXFAT_DEFAULT_IOCHARSET
 	depends on EXFAT_FS
 	help
 	  Set this to the default input/output character set you'd like exFAT to use.
+
+config EXFAT_VIRTUAL_XATTR
+	bool "Virtual xattr support for exFAT filesystem"
+	default y
+	depends on EXFAT_FS
+	help
+	  Modification of exFAT filesystem for virtual xattr
+
+config EXFAT_VIRTUAL_XATTR_SELINUX_LABEL
+	string "Default string for SELinux label"
+	depends on EXFAT_FS && EXFAT_VIRTUAL_XATTR
+	default "u:object_r:sdcard_external:s0"
+	help
+	  Set this to the default string for SELinux label.
+
+config EXFAT_SUPPORT_STLOG
+	bool "Enable storage log"
+	default y
+	depends on EXFAT_FS && PROC_STLOG

Makefile

@@ -5,10 +5,19 @@
 ifneq ($(KERNELRELEASE),)
 # call from kernel build system
 
-obj-$(CONFIG_EXFAT_FS) += exfat.o
+obj-$(CONFIG_EXFAT_FS) += exfat_core.o exfat_fs.o
 
-exfat-objs := exfat_core.o exfat_super.o exfat_api.o exfat_blkdev.o exfat_cache.o \
-			   exfat_data.o exfat_bitmap.o exfat_nls.o exfat_oal.o exfat_upcase.o
+exfat_fs-y	:= exfat_super.o
+
+exfat_core-y	:= exfat.o exfat_api.o exfat_blkdev.o exfat_cache.o \
+			   exfat_data.o exfat_global.o exfat_nls.o \
+			   exfat_oal.o exfat_upcase.o exfat_xattr.o
+
+all:
+	$(MAKE) -C /lib/modules/$(KERNELRELEASE)/build M=$(PWD) modules
+
+clean:
+	$(MAKE) -C /lib/modules/$(KERNELRELEASE)/build M=$(PWD) clean
 
 else
 # external module build
@@ -24,9 +33,11 @@ EXTRA_FLAGS += -I$(PWD)
 # any valid path to the directory in which the target kernel's source is located
 # can be provided on the command line.
 #
-KDIR	?= /lib/modules/$(shell uname -r)/build
-MDIR	?= /lib/modules/$(shell uname -r)
+KVER	?= $(shell uname -r)
+KDIR	:= /lib/modules/$(KVER)/build
+MDIR	:= /lib/modules/$(KVER)
 PWD	:= $(shell pwd)
+KREL	:= $(shell cd ${KDIR} && make -s kernelrelease)
 PWD	:= $(shell pwd)
 
 export CONFIG_EXFAT_FS := m
@@ -40,14 +51,20 @@ clean:
 help:
 	$(MAKE) -C $(KDIR) M=$(PWD) help
 
-install: exfat.ko
-	rm -f ${MDIR}/kernel/fs/exfat/exfat.ko
-	install -m644 -b -D exfat.ko ${MDIR}/kernel/fs/exfat/exfat.ko
-	depmod -aq
-
+install:all
+	rm -f ${DESTDIR}${MDIR}/kernel/fs/exfat/exfat.ko
+	rm -f ${DESTDIR}${MDIR}/kernel/fs/exfat/exfat_fs.ko
+	rm -f ${DESTDIR}${MDIR}/kernel/fs/exfat/exfat_core.ko
+	install -m644 -b -D exfat_core.ko ${DESTDIR}${MDIR}/kernel/fs/exfat/exfat_core.ko
+	install -m644 -b -D exfat_fs.ko ${DESTDIR}${MDIR}/kernel/fs/exfat/exfat_fs.ko
+ifeq ($(DESTDIR),)
+		depmod -a
+endif
 uninstall:
-	rm -rf ${MDIR}/kernel/fs/exfat
-	depmod -aq
+	rm -rf ${DESTDIR}/${MDIR}/kernel/fs/exfat
+ifeq ($(DESTDIR),)
+		depmod -a
+endif
 
 endif
 

README.md

@@ -1,98 +1,41 @@
-exfat-nofuse
+exFAT-nofuse v1.2.24-dragon
 ============
 
 Linux non-fuse read/write kernel driver for the exFAT, FAT12, FAT16 and vfat (FAT32) file systems.<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!<br />
-Big thanks to benpicco for fixing 3.11.y compatibility!
 
+**Full adaptation to kernel 4.19.y**
 
-Special thanks to github user AndreiLux for spreading the word about the leak!<br />
-
-
-Installing as a stand-alone module:
-====================================
-
-    make
-    sudo make install
 
 To load the driver manually, run this as root:
+==============================================
 
-    modprobe exfat
-
-You may also specify custom toolchains by using CROSS_COMPILE flag, in my case:
->CROSS_COMPILE=../dorimanx-SG2-I9100-Kernel/android-toolchain/bin/arm-eabi-
-
-Installing as a part of the kernel:
-======================================
-
-Let's take [linux] as the path to your kernel source dir...
-
-	cd [linux]
-	cp -rvf exfat-nofuse [linux]/fs/exfat
-
-edit [linux]/fs/Kconfig
-```
- menu "DOS/FAT/NT Filesystems"
-
-  source "fs/fat/Kconfig"
- +source "fs/exfat/Kconfig"
-  source "fs/ntfs/Kconfig"
-  endmenu
-```
-
-
-edit [linux]/fs/Makefile
-```
-  obj-$(CONFIG_FAT_FS)    += fat/
- +obj-$(CONFIG_EXFAT_FS)  += exfat/
-  obj-$(CONFIG_BFS_FS)    += bfs/
-```
-
-	cd [linux]
-	make menuconfig
-
-Go to:
-> File systems > DOS/FAT/NT
->   check exfat as MODULE (M)
->   (437) Default codepage for exFAT
->   (utf8) Default iocharset for exFAT
-
-> ESC to main menu
-> Save an Alternate Configuration File
-> ESC ESC
-
-build your kernel
-
-Have fun.
-
-
-Installing as a DKMS module:
-=================================
+    modprobe exfat_core
+    modprobe exfat_fs
 
-You can have even more fun with exfat-nofuse by installing it as a DKMS module has the main advantage of being auto-compiled (and thus, possibly surviving) between kernel upgrades.
 
-First, get dkms. On Ubuntu this should be:
+Enable exFAT module and install exfat-utils:
+============================================
 
-	sudo apt install dkms
+Add to /etc/initramfs-tools/modules:
 
-Then copy the root of this repository to /usr/share:
+    exfat_core
+    exfat_fs
 
-	sudo cp -R . /usr/src/exfat-1.2.8 (or whatever version number declared on dkms.conf is)
-	sudo dkms add -m exfat -v 1.2.8
+For filesystem creation and manipulation beyond that of the mount command it is necessary to install the exfat-utils package:
+=============================================================================================================================
 
-Build and load the module:
+    $ sudo apt install exfat-utils
+    $ sudo apt purge exfat-fuse
 
-	sudo dkms build -m exfat -v 1.2.8
-	sudo dkms install -m exfat -v 1.2.8
 
-Now you have a proper dkms module that will work for a long time... hopefully.
+To create an exFAT file system, use mkfs.exfat (or the mkexfatfs command, which is synonymous):
+===============================================================================================
 
+    root #mkfs.exfat
+    mkexfatfs 1.2.8
+    Usage: mkfs.exfat [-i volume-id] [-n label] [-p partition-first-sector] [-s sectors-per-cluster] [-V] <device>
+    For instance, to create it on a removable device present at /dev/sde1 while assigning "Flash" as the file system label:
 
+    root #mkfs.exfat -n Flash /dev/sde1
 
-Free Software for the Free Minds!
-=================================