ntfs: add Kconfig and Makefile

Introduce Kconfig and Makefile for remade ntfs.
And this patch make ntfs and ntfs3 mutually exclusive so only one can be
built-in(y), while both can still be built as modules(m).

Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

fs/Kconfig

@@ -152,6 +152,7 @@ menu "DOS/FAT/EXFAT/NT Filesystems"
 
 source "fs/fat/Kconfig"
 source "fs/exfat/Kconfig"
+source "fs/ntfs/Kconfig"
 source "fs/ntfs3/Kconfig"
 
 endmenu

fs/Makefile

@@ -90,6 +90,7 @@ obj-$(CONFIG_NLS)		+= nls/
 obj-y				+= unicode/
 obj-$(CONFIG_SMBFS)		+= smb/
 obj-$(CONFIG_HPFS_FS)		+= hpfs/
+obj-$(CONFIG_NTFS_FS)		+= ntfs/
 obj-$(CONFIG_NTFS3_FS)		+= ntfs3/
 obj-$(CONFIG_UFS_FS)		+= ufs/
 obj-$(CONFIG_EFS_FS)		+= efs/

fs/ntfs/Kconfig

@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config NTFS_FS
+	tristate "NTFS file system support"
+	select NLS
+	help
+	  NTFS is the file system of Microsoft Windows NT, 2000, XP and 2003.
+	  This allows you to mount devices formatted with the ntfs file system.
+
+	  To compile this as a module, choose M here: the module will be called
+	  ntfs.
+
+config NTFS_DEBUG
+	bool "NTFS debugging support"
+	depends on NTFS_FS
+	help
+	  If you are experiencing any problems with the NTFS file system, say
+	  Y here.  This will result in additional consistency checks to be
+	  performed by the driver as well as additional debugging messages to
+	  be written to the system log.  Note that debugging messages are
+	  disabled by default.  To enable them, supply the option debug_msgs=1
+	  at the kernel command line when booting the kernel or as an option
+	  to insmod when loading the ntfs module.  Once the driver is active,
+	  you can enable debugging messages by doing (as root):
+	  echo 1 > /proc/sys/fs/ntfs-debug
+	  Replacing the "1" with "0" would disable debug messages.
+
+	  If you leave debugging messages disabled, this results in little
+	  overhead, but enabling debug messages results in very significant
+	  slowdown of the system.
+
+	  When reporting bugs, please try to have available a full dump of
+	  debugging messages while the misbehaviour was occurring.
+
+config NTFS_FS_POSIX_ACL
+	bool "NTFS POSIX Access Control Lists"
+	depends on NTFS_FS
+	select FS_POSIX_ACL
+	help
+	  POSIX Access Control Lists (ACLs) support additional access rights
+	  for users and groups beyond the standard owner/group/world scheme.
+
+	  This option enables ACL support for ntfs, providing functional parity
+	  with ntfs3 drivier.
+
+	  NOTE: this is linux only feature. Windows will ignore these ACLs.
+
+	  If you don't know what Access Control Lists are, say N.

fs/ntfs/Makefile

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_NTFS_FS) += ntfs.o
+
+ntfs-y := aops.o attrib.o collate.o dir.o file.o index.o inode.o \
+	  mft.o mst.o namei.o runlist.o super.o unistr.o attrlist.o ea.o \
+	  upcase.o bitmap.o lcnalloc.o logfile.o reparse.o compress.o \
+	  iomap.o debug.o sysctl.o quota.o object_id.o bdev-io.o
+
+ccflags-$(CONFIG_NTFS_DEBUG) += -DDEBUG

fs/ntfs3/Kconfig

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config NTFS3_FS
 	tristate "NTFS Read-Write file system support"
+	depends on !NTFS_FS || m
 	select BUFFER_HEAD
 	select NLS
 	select LEGACY_DIRECT_IO