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Filename Latest commit message Latest commit date
Sungjong Seo 17d8731ce1 exfat: redefine DIR_DELETED as the bad cluster number 
When a file or a directory is deleted, the hint for the cluster of
its parent directory in its in-memory inode is set as DIR_DELETED.
Therefore, DIR_DELETED must be one of invalid cluster numbers. According
to the exFAT specification, a volume can have at most 2^32-11 clusters.
However, DIR_DELETED is wrongly defined as 0xFFFF0321, which could be
a valid cluster number. To fix it, let's redefine DIR_DELETED as
0xFFFFFFF7, the bad cluster number.

Fixes: 1acf1a564b60 ("exfat: add in-memory and on-disk structures and headers")
Cc: stable@vger.kernel.org # v5.7+
Reported-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Signed-off-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
2023-01-02 22:31:54 +09:00
.github/workflows exfat: remove generic/286 2022-12-09 23:20:49 +09:00
balloc.c
cache.c
dir.c exfat: fix reporting fs error when reading dir beyond EOF 2022-12-30 10:44:41 +09:00
exfat_fs.h exfat: redefine DIR_DELETED as the bad cluster number 2023-01-02 22:31:54 +09:00
exfat_raw.h
fatent.c exfat: fix overflow for large capacity partition 2022-08-24 08:21:31 +09:00
file.c exfat: remove i_size_write() from __exfat_truncate() 2022-12-15 08:29:26 +09:00
inode.c exfat: remove i_size_write() from __exfat_truncate() 2022-12-15 08:29:26 +09:00
Kconfig
Makefile
misc.c exfat: Expand exfat_err() and co directly to pr_*() macro 2022-07-29 17:26:04 +09:00
namei.c exfat: remove unnecessary arguments from exfat_find_dir_entry() 2022-12-15 08:29:19 +09:00
nls.c exfat: Drop superfluous new line for error messages 2022-07-29 17:26:12 +09:00
README.md
super.c exfat: Drop superfluous new line for error messages 2022-07-29 17:26:12 +09:00

README.md

exFAT filesystem

This is the exfat filesystem for support from the linux 4.1 kernel to the latest kernel.

Installing as a stand-alone module

Install prerequisite package for Fedora, RHEL:

	yum install kernel-devel-$(uname -r)

Build step:

	make
	sudo make install

To load the driver manually, run this as root:

	modprobe exfat

Installing as a part of the kernel

  1. Let's take [linux] as the path to your kernel source dir.
	cd [linux]
	cp -ar exfat [linux]/fs/
  1. edit [linux]/fs/Kconfig
	source "fs/fat/Kconfig"
	+source "fs/exfat/Kconfig"
	source "fs/ntfs/Kconfig"
  1. edit [linux]/fs/Makefile
	obj-$(CONFIG_FAT_FS)          += fat/
	+obj-$(CONFIG_EXFAT_FS)       += exfat/
	obj-$(CONFIG_BFS_FS)          += bfs/
  1. make menuconfig and set exfat
	File systems  --->
		DOS/FAT/NT Filesystems  --->
			<M> exFAT filesystem support
			(utf8) Default iocharset for exFAT

build your kernel