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Kconfig
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#
# File system configuration
#
menu "File systems"
if BLOCK
config EXT2_FS
tristate "Second extended fs support"
help
Ext2 is a standard Linux file system for hard disks.
To compile this file system support as a module, choose M here: the
module will be called ext2.
If unsure, say Y.
config EXT2_FS_XATTR
bool "Ext2 extended attributes"
depends on EXT2_FS
help
Extended attributes are name:value pairs associated with inodes by
the kernel or by users (see the attr(5) manual page, or visit
<http://acl.bestbits.at/> for details).
If unsure, say N.
config EXT2_FS_POSIX_ACL
bool "Ext2 POSIX Access Control Lists"
depends on EXT2_FS_XATTR
select FS_POSIX_ACL
help
Posix Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
To learn more about Access Control Lists, visit the Posix ACLs for
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N
config EXT2_FS_SECURITY
bool "Ext2 Security Labels"
depends on EXT2_FS_XATTR
help
Security labels support alternative access control models
implemented by security modules like SELinux. This option
enables an extended attribute handler for file security
labels in the ext2 filesystem.
If you are not using a security module that requires using
extended attributes for file security labels, say N.
config EXT2_FS_XIP
bool "Ext2 execute in place support"
depends on EXT2_FS && MMU
help
Execute in place can be used on memory-backed block devices. If you
enable this option, you can select to mount block devices which are
capable of this feature without using the page cache.
If you do not use a block device that is capable of using this,
or if unsure, say N.
config FS_XIP
# execute in place
bool
depends on EXT2_FS_XIP
default y
config EXT3_FS
tristate "Ext3 journalling file system support"
select JBD
help
This is the journalling version of the Second extended file system
(often called ext3), the de facto standard Linux file system
(method to organize files on a storage device) for hard disks.
The journalling code included in this driver means you do not have
to run e2fsck (file system checker) on your file systems after a
crash. The journal keeps track of any changes that were being made
at the time the system crashed, and can ensure that your file system
is consistent without the need for a lengthy check.
Other than adding the journal to the file system, the on-disk format
of ext3 is identical to ext2. It is possible to freely switch
between using the ext3 driver and the ext2 driver, as long as the
file system has been cleanly unmounted, or e2fsck is run on the file
system.
To add a journal on an existing ext2 file system or change the
behavior of ext3 file systems, you can use the tune2fs utility ("man
tune2fs"). To modify attributes of files and directories on ext3
file systems, use chattr ("man chattr"). You need to be using
e2fsprogs version 1.20 or later in order to create ext3 journals
(available at <http://sourceforge.net/projects/e2fsprogs/>).
To compile this file system support as a module, choose M here: the
module will be called ext3.
config EXT3_FS_XATTR
bool "Ext3 extended attributes"
depends on EXT3_FS
default y
help
Extended attributes are name:value pairs associated with inodes by
the kernel or by users (see the attr(5) manual page, or visit
<http://acl.bestbits.at/> for details).
If unsure, say N.
You need this for POSIX ACL support on ext3.
config EXT3_FS_POSIX_ACL
bool "Ext3 POSIX Access Control Lists"
depends on EXT3_FS_XATTR
select FS_POSIX_ACL
help
Posix Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
To learn more about Access Control Lists, visit the Posix ACLs for
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N
config EXT3_FS_SECURITY
bool "Ext3 Security Labels"
depends on EXT3_FS_XATTR
help
Security labels support alternative access control models
implemented by security modules like SELinux. This option
enables an extended attribute handler for file security
labels in the ext3 filesystem.
If you are not using a security module that requires using
extended attributes for file security labels, say N.
config EXT4DEV_FS
tristate "Ext4dev/ext4 extended fs support development (EXPERIMENTAL)"
depends on EXPERIMENTAL
select JBD2
help
Ext4dev is a predecessor filesystem of the next generation
extended fs ext4, based on ext3 filesystem code. It will be
renamed ext4 fs later, once ext4dev is mature and stabilized.
Unlike the change from ext2 filesystem to ext3 filesystem,
the on-disk format of ext4dev is not the same as ext3 any more:
it is based on extent maps and it supports 48-bit physical block
numbers. These combined on-disk format changes will allow
ext4dev/ext4 to handle more than 16 TB filesystem volumes --
a hard limit that ext3 cannot overcome without changing the
on-disk format.
Other than extent maps and 48-bit block numbers, ext4dev also is
likely to have other new features such as persistent preallocation,
high resolution time stamps, and larger file support etc. These
features will be added to ext4dev gradually.
To compile this file system support as a module, choose M here. The
module will be called ext4dev.
If unsure, say N.
config EXT4DEV_FS_XATTR
bool "Ext4dev extended attributes"
depends on EXT4DEV_FS
default y
help
Extended attributes are name:value pairs associated with inodes by
the kernel or by users (see the attr(5) manual page, or visit
<http://acl.bestbits.at/> for details).
If unsure, say N.
You need this for POSIX ACL support on ext4dev/ext4.
config EXT4DEV_FS_POSIX_ACL
bool "Ext4dev POSIX Access Control Lists"
depends on EXT4DEV_FS_XATTR
select FS_POSIX_ACL
help
POSIX Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
To learn more about Access Control Lists, visit the POSIX ACLs for
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N
config EXT4DEV_FS_SECURITY
bool "Ext4dev Security Labels"
depends on EXT4DEV_FS_XATTR
help
Security labels support alternative access control models
implemented by security modules like SELinux. This option
enables an extended attribute handler for file security
labels in the ext4dev/ext4 filesystem.
If you are not using a security module that requires using
extended attributes for file security labels, say N.
config JBD
tristate
help
This is a generic journalling layer for block devices. It is
currently used by the ext3 and OCFS2 file systems, but it could
also be used to add journal support to other file systems or block
devices such as RAID or LVM.
If you are using the ext3 or OCFS2 file systems, you need to
say Y here. If you are not using ext3 OCFS2 then you will probably
want to say N.
To compile this device as a module, choose M here: the module will be
called jbd. If you are compiling ext3 or OCFS2 into the kernel,
you cannot compile this code as a module.
config JBD_DEBUG
bool "JBD (ext3) debugging support"
depends on JBD
help
If you are using the ext3 journaled file system (or potentially any
other file system/device using JBD), this option allows you to
enable debugging output while the system is running, in order to
help track down any problems you are having. By default the
debugging output will be turned off.
If you select Y here, then you will be able to turn on debugging
with "echo N > /proc/sys/fs/jbd-debug", where N is a number between
1 and 5, the higher the number, the more debugging output is
generated. To turn debugging off again, do
"echo 0 > /proc/sys/fs/jbd-debug".
config JBD2
tristate
help
This is a generic journaling layer for block devices that support
both 32-bit and 64-bit block numbers. It is currently used by
the ext4dev/ext4 filesystem, but it could also be used to add
journal support to other file systems or block devices such
as RAID or LVM.
If you are using ext4dev/ext4, you need to say Y here. If you are not
using ext4dev/ext4 then you will probably want to say N.
To compile this device as a module, choose M here. The module will be
called jbd2. If you are compiling ext4dev/ext4 into the kernel,
you cannot compile this code as a module.
config JBD2_DEBUG
bool "JBD2 (ext4dev/ext4) debugging support"
depends on JBD2 && DEBUG_FS
help
If you are using the ext4dev/ext4 journaled file system (or
potentially any other filesystem/device using JBD2), this option
allows you to enable debugging output while the system is running,
in order to help track down any problems you are having.
By default, the debugging output will be turned off.
If you select Y here, then you will be able to turn on debugging
with "echo N > /sys/kernel/debug/jbd2/jbd2-debug", where N is a
number between 1 and 5. The higher the number, the more debugging
output is generated. To turn debugging off again, do
"echo 0 > /sys/kernel/debug/jbd2/jbd2-debug".
config FS_MBCACHE
# Meta block cache for Extended Attributes (ext2/ext3/ext4)
tristate
depends on EXT2_FS_XATTR || EXT3_FS_XATTR || EXT4DEV_FS_XATTR
default y if EXT2_FS=y || EXT3_FS=y || EXT4DEV_FS=y
default m if EXT2_FS=m || EXT3_FS=m || EXT4DEV_FS=m
config REISERFS_FS
tristate "Reiserfs support"
help
Stores not just filenames but the files themselves in a balanced
tree. Uses journalling.
Balanced trees are more efficient than traditional file system
architectural foundations.
In general, ReiserFS is as fast as ext2, but is very efficient with
large directories and small files. Additional patches are needed
for NFS and quotas, please see <http://www.namesys.com/> for links.
It is more easily extended to have features currently found in
database and keyword search systems than block allocation based file
systems are. The next version will be so extended, and will support
plugins consistent with our motto ``It takes more than a license to
make source code open.''
Read <http://www.namesys.com/> to learn more about reiserfs.
Sponsored by Threshold Networks, Emusic.com, and Bigstorage.com.
If you like it, you can pay us to add new features to it that you
need, buy a support contract, or pay us to port it to another OS.
config REISERFS_CHECK
bool "Enable reiserfs debug mode"
depends on REISERFS_FS
help
If you set this to Y, then ReiserFS will perform every check it can
possibly imagine of its internal consistency throughout its
operation. It will also go substantially slower. More than once we
have forgotten that this was on, and then gone despondent over the
latest benchmarks.:-) Use of this option allows our team to go all
out in checking for consistency when debugging without fear of its
effect on end users. If you are on the verge of sending in a bug
report, say Y and you might get a useful error message. Almost
everyone should say N.
config REISERFS_PROC_INFO
bool "Stats in /proc/fs/reiserfs"
depends on REISERFS_FS && PROC_FS
help
Create under /proc/fs/reiserfs a hierarchy of files, displaying
various ReiserFS statistics and internal data at the expense of
making your kernel or module slightly larger (+8 KB). This also
increases the amount of kernel memory required for each mount.
Almost everyone but ReiserFS developers and people fine-tuning
reiserfs or tracing problems should say N.
config REISERFS_FS_XATTR
bool "ReiserFS extended attributes"
depends on REISERFS_FS
help
Extended attributes are name:value pairs associated with inodes by
the kernel or by users (see the attr(5) manual page, or visit
<http://acl.bestbits.at/> for details).
If unsure, say N.
config REISERFS_FS_POSIX_ACL
bool "ReiserFS POSIX Access Control Lists"
depends on REISERFS_FS_XATTR
select FS_POSIX_ACL
help
Posix Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
To learn more about Access Control Lists, visit the Posix ACLs for
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N
config REISERFS_FS_SECURITY
bool "ReiserFS Security Labels"
depends on REISERFS_FS_XATTR
help
Security labels support alternative access control models
implemented by security modules like SELinux. This option
enables an extended attribute handler for file security
labels in the ReiserFS filesystem.
If you are not using a security module that requires using
extended attributes for file security labels, say N.
config JFS_FS
tristate "JFS filesystem support"
select NLS
help
This is a port of IBM's Journaled Filesystem . More information is
available in the file <file:Documentation/filesystems/jfs.txt>.
If you do not intend to use the JFS filesystem, say N.
config JFS_POSIX_ACL
bool "JFS POSIX Access Control Lists"
depends on JFS_FS
select FS_POSIX_ACL
help
Posix Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
To learn more about Access Control Lists, visit the Posix ACLs for
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N
config JFS_SECURITY
bool "JFS Security Labels"
depends on JFS_FS
help
Security labels support alternative access control models
implemented by security modules like SELinux. This option
enables an extended attribute handler for file security
labels in the jfs filesystem.
If you are not using a security module that requires using
extended attributes for file security labels, say N.
config JFS_DEBUG
bool "JFS debugging"
depends on JFS_FS
help
If you are experiencing any problems with the JFS filesystem, say
Y here. This will result in additional debugging messages to be
written to the system log. Under normal circumstances, this
results in very little overhead.
config JFS_STATISTICS
bool "JFS statistics"
depends on JFS_FS
help
Enabling this option will cause statistics from the JFS file system
to be made available to the user in the /proc/fs/jfs/ directory.
config FS_POSIX_ACL
# Posix ACL utility routines (for now, only ext2/ext3/jfs/reiserfs)
#
# NOTE: you can implement Posix ACLs without these helpers (XFS does).
# Never use this symbol for ifdefs.
#
bool
default n
source "fs/xfs/Kconfig"
source "fs/gfs2/Kconfig"
config OCFS2_FS
tristate "OCFS2 file system support"
depends on NET && SYSFS
select CONFIGFS_FS
select JBD
select CRC32
help
OCFS2 is a general purpose extent based shared disk cluster file
system with many similarities to ext3. It supports 64 bit inode
numbers, and has automatically extending metadata groups which may
also make it attractive for non-clustered use.
You'll want to install the ocfs2-tools package in order to at least
get "mount.ocfs2".
Project web page: http://oss.oracle.com/projects/ocfs2
Tools web page: http://oss.oracle.com/projects/ocfs2-tools
OCFS2 mailing lists: http://oss.oracle.com/projects/ocfs2/mailman/
Note: Features which OCFS2 does not support yet:
- extended attributes
- quotas
- cluster aware flock
- Directory change notification (F_NOTIFY)
- Distributed Caching (F_SETLEASE/F_GETLEASE/break_lease)
- POSIX ACLs
- readpages / writepages (not user visible)
config OCFS2_DEBUG_MASKLOG
bool "OCFS2 logging support"
depends on OCFS2_FS
default y
help
The ocfs2 filesystem has an extensive logging system. The system
allows selection of events to log via files in /sys/o2cb/logmask/.
This option will enlarge your kernel, but it allows debugging of
ocfs2 filesystem issues.
config MINIX_FS
tristate "Minix fs support"
help
Minix is a simple operating system used in many classes about OS's.
The minix file system (method to organize files on a hard disk
partition or a floppy disk) was the original file system for Linux,
but has been superseded by the second extended file system ext2fs.
You don't want to use the minix file system on your hard disk
because of certain built-in restrictions, but it is sometimes found
on older Linux floppy disks. This option will enlarge your kernel
by about 28 KB. If unsure, say N.
To compile this file system support as a module, choose M here: the
module will be called minix. Note that the file system of your root
partition (the one containing the directory /) cannot be compiled as
a module.
config ROMFS_FS
tristate "ROM file system support"
---help---
This is a very small read-only file system mainly intended for
initial ram disks of installation disks, but it could be used for
other read-only media as well. Read
<file:Documentation/filesystems/romfs.txt> for details.
To compile this file system support as a module, choose M here: the
module will be called romfs. Note that the file system of your
root partition (the one containing the directory /) cannot be a
module.
If you don't know whether you need it, then you don't need it:
answer N.
endif
config INOTIFY
bool "Inotify file change notification support"
default y
---help---
Say Y here to enable inotify support. Inotify is a file change
notification system and a replacement for dnotify. Inotify fixes
numerous shortcomings in dnotify and introduces several new features
including multiple file events, one-shot support, and unmount
notification.
For more information, see Documentation/filesystems/inotify.txt
If unsure, say Y.
config INOTIFY_USER
bool "Inotify support for userspace"
depends on INOTIFY
default y
---help---
Say Y here to enable inotify support for userspace, including the
associated system calls. Inotify allows monitoring of both files and
directories via a single open fd. Events are read from the file
descriptor, which is also select()- and poll()-able.
For more information, see Documentation/filesystems/inotify.txt
If unsure, say Y.
config QUOTA
bool "Quota support"
help
If you say Y here, you will be able to set per user limits for disk
usage (also called disk quotas). Currently, it works for the
ext2, ext3, and reiserfs file system. ext3 also supports journalled
quotas for which you don't need to run quotacheck(8) after an unclean
shutdown.
For further details, read the Quota mini-HOWTO, available from
<http://www.tldp.org/docs.html#howto>, or the documentation provided
with the quota tools. Probably the quota support is only useful for
multi user systems. If unsure, say N.
config QFMT_V1
tristate "Old quota format support"
depends on QUOTA
help
This quota format was (is) used by kernels earlier than 2.4.22. If
you have quota working and you don't want to convert to new quota
format say Y here.
config QFMT_V2
tristate "Quota format v2 support"
depends on QUOTA
help
This quota format allows using quotas with 32-bit UIDs/GIDs. If you
need this functionality say Y here.
config QUOTACTL
bool
depends on XFS_QUOTA || QUOTA
default y
config DNOTIFY
bool "Dnotify support" if EMBEDDED
default y
help
Dnotify is a directory-based per-fd file change notification system
that uses signals to communicate events to user-space. There exist
superior alternatives, but some applications may still rely on
dnotify.
Because of this, if unsure, say Y.
config AUTOFS_FS
tristate "Kernel automounter support"
help
The automounter is a tool to automatically mount remote file systems
on demand. This implementation is partially kernel-based to reduce
overhead in the already-mounted case; this is unlike the BSD
automounter (amd), which is a pure user space daemon.
To use the automounter you need the user-space tools from the autofs
package; you can find the location in <file:Documentation/Changes>.
You also want to answer Y to "NFS file system support", below.
If you want to use the newer version of the automounter with more
features, say N here and say Y to "Kernel automounter v4 support",
below.
To compile this support as a module, choose M here: the module will be
called autofs.
If you are not a part of a fairly large, distributed network, you
probably do not need an automounter, and can say N here.
config AUTOFS4_FS
tristate "Kernel automounter version 4 support (also supports v3)"
help
The automounter is a tool to automatically mount remote file systems
on demand. This implementation is partially kernel-based to reduce
overhead in the already-mounted case; this is unlike the BSD
automounter (amd), which is a pure user space daemon.
To use the automounter you need the user-space tools from
<ftp://ftp.kernel.org/pub/linux/daemons/autofs/v4/>; you also
want to answer Y to "NFS file system support", below.
To compile this support as a module, choose M here: the module will be
called autofs4. You will need to add "alias autofs autofs4" to your
modules configuration file.
If you are not a part of a fairly large, distributed network or
don't have a laptop which needs to dynamically reconfigure to the
local network, you probably do not need an automounter, and can say
N here.
config FUSE_FS
tristate "Filesystem in Userspace support"
help
With FUSE it is possible to implement a fully functional filesystem
in a userspace program.
There's also companion library: libfuse. This library along with
utilities is available from the FUSE homepage:
<http://fuse.sourceforge.net/>
See <file:Documentation/filesystems/fuse.txt> for more information.
See <file:Documentation/Changes> for needed library/utility version.
If you want to develop a userspace FS, or if you want to use
a filesystem based on FUSE, answer Y or M.
config GENERIC_ACL
bool
select FS_POSIX_ACL
if BLOCK
menu "CD-ROM/DVD Filesystems"
config ISO9660_FS
tristate "ISO 9660 CDROM file system support"
help
This is the standard file system used on CD-ROMs. It was previously
known as "High Sierra File System" and is called "hsfs" on other
Unix systems. The so-called Rock-Ridge extensions which allow for
long Unix filenames and symbolic links are also supported by this
driver. If you have a CD-ROM drive and want to do more with it than
just listen to audio CDs and watch its LEDs, say Y (and read
<file:Documentation/filesystems/isofs.txt> and the CD-ROM-HOWTO,
available from <http://www.tldp.org/docs.html#howto>), thereby
enlarging your kernel by about 27 KB; otherwise say N.
To compile this file system support as a module, choose M here: the
module will be called isofs.
config JOLIET
bool "Microsoft Joliet CDROM extensions"
depends on ISO9660_FS
select NLS
help
Joliet is a Microsoft extension for the ISO 9660 CD-ROM file system
which allows for long filenames in unicode format (unicode is the
new 16 bit character code, successor to ASCII, which encodes the
characters of almost all languages of the world; see
<http://www.unicode.org/> for more information). Say Y here if you
want to be able to read Joliet CD-ROMs under Linux.
config ZISOFS
bool "Transparent decompression extension"
depends on ISO9660_FS
select ZLIB_INFLATE
help
This is a Linux-specific extension to RockRidge which lets you store
data in compressed form on a CD-ROM and have it transparently
decompressed when the CD-ROM is accessed. See
<http://www.kernel.org/pub/linux/utils/fs/zisofs/> for the tools
necessary to create such a filesystem. Say Y here if you want to be
able to read such compressed CD-ROMs.
config UDF_FS
tristate "UDF file system support"
help
This is the new file system used on some CD-ROMs and DVDs. Say Y if
you intend to mount DVD discs or CDRW's written in packet mode, or
if written to by other UDF utilities, such as DirectCD.
Please read <file:Documentation/filesystems/udf.txt>.
To compile this file system support as a module, choose M here: the
module will be called udf.
If unsure, say N.
config UDF_NLS
bool
default y
depends on (UDF_FS=m && NLS) || (UDF_FS=y && NLS=y)
endmenu
endif
if BLOCK
menu "DOS/FAT/NT Filesystems"
config FAT_FS
tristate
select NLS
help
If you want to use one of the FAT-based file systems (the MS-DOS and
VFAT (Windows 95) file systems), then you must say Y or M here
to include FAT support. You will then be able to mount partitions or
diskettes with FAT-based file systems and transparently access the
files on them, i.e. MSDOS files will look and behave just like all
other Unix files.
This FAT support is not a file system in itself, it only provides
the foundation for the other file systems. You will have to say Y or
M to at least one of "MSDOS fs support" or "VFAT fs support" in
order to make use of it.
Another way to read and write MSDOS floppies and hard drive
partitions from within Linux (but not transparently) is with the
mtools ("man mtools") program suite. You don't need to say Y here in
order to do that.
If you need to move large files on floppies between a DOS and a
Linux box, say Y here, mount the floppy under Linux with an MSDOS
file system and use GNU tar's M option. GNU tar is a program
available for Unix and DOS ("man tar" or "info tar").
The FAT support will enlarge your kernel by about 37 KB. If unsure,
say Y.
To compile this as a module, choose M here: the module will be called
fat. Note that if you compile the FAT support as a module, you
cannot compile any of the FAT-based file systems into the kernel
-- they will have to be modules as well.
config MSDOS_FS
tristate "MSDOS fs support"
select FAT_FS
help
This allows you to mount MSDOS partitions of your hard drive (unless
they are compressed; to access compressed MSDOS partitions under
Linux, you can either use the DOS emulator DOSEMU, described in the
DOSEMU-HOWTO, available from
<http://www.tldp.org/docs.html#howto>, or try dmsdosfs in
<ftp://ibiblio.org/pub/Linux/system/filesystems/dosfs/>. If you
intend to use dosemu with a non-compressed MSDOS partition, say Y
here) and MSDOS floppies. This means that file access becomes
transparent, i.e. the MSDOS files look and behave just like all
other Unix files.
If you have Windows 95 or Windows NT installed on your MSDOS
partitions, you should use the VFAT file system (say Y to "VFAT fs
support" below), or you will not be able to see the long filenames
generated by Windows 95 / Windows NT.
This option will enlarge your kernel by about 7 KB. If unsure,
answer Y. This will only work if you said Y to "DOS FAT fs support"
as well. To compile this as a module, choose M here: the module will
be called msdos.
config VFAT_FS
tristate "VFAT (Windows-95) fs support"
select FAT_FS
help
This option provides support for normal Windows file systems with
long filenames. That includes non-compressed FAT-based file systems
used by Windows 95, Windows 98, Windows NT 4.0, and the Unix
programs from the mtools package.
The VFAT support enlarges your kernel by about 10 KB and it only
works if you said Y to the "DOS FAT fs support" above. Please read
the file <file:Documentation/filesystems/vfat.txt> for details. If
unsure, say Y.
To compile this as a module, choose M here: the module will be called
vfat.
config FAT_DEFAULT_CODEPAGE
int "Default codepage for FAT"
depends on MSDOS_FS || VFAT_FS
default 437
help
This option should be set to the codepage of your FAT filesystems.
It can be overridden with the "codepage" mount option.
See <file:Documentation/filesystems/vfat.txt> for more information.
config FAT_DEFAULT_IOCHARSET
string "Default iocharset for FAT"
depends on VFAT_FS
default "iso8859-1"
help
Set this to the default input/output character set you'd
like FAT to use. It should probably match the character set
that most of your FAT filesystems use, and can be overridden
with the "iocharset" mount option for FAT filesystems.
Note that "utf8" is not recommended for FAT filesystems.
If unsure, you shouldn't set "utf8" here.
See <file:Documentation/filesystems/vfat.txt> for more information.
config NTFS_FS
tristate "NTFS file system support"
select NLS
help
NTFS is the file system of Microsoft Windows NT, 2000, XP and 2003.
Saying Y or M here enables read support. There is partial, but
safe, write support available. For write support you must also
say Y to "NTFS write support" below.
There are also a number of user-space tools available, called
ntfsprogs. These include ntfsundelete and ntfsresize, that work
without NTFS support enabled in the kernel.
This is a rewrite from scratch of Linux NTFS support and replaced
the old NTFS code starting with Linux 2.5.11. A backport to
the Linux 2.4 kernel series is separately available as a patch
from the project web site.
For more information see <file:Documentation/filesystems/ntfs.txt>
and <http://linux-ntfs.sourceforge.net/>.
To compile this file system support as a module, choose M here: the
module will be called ntfs.
If you are not using Windows NT, 2000, XP or 2003 in addition to
Linux on your computer it is safe to say N.
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_RW
bool "NTFS write support"
depends on NTFS_FS
help
This enables the partial, but safe, write support in the NTFS driver.
The only supported operation is overwriting existing files, without
changing the file length. No file or directory creation, deletion or
renaming is possible. Note only non-resident files can be written to
so you may find that some very small files (<500 bytes or so) cannot
be written to.
While we cannot guarantee that it will not damage any data, we have
so far not received a single report where the driver would have
damaged someones data so we assume it is perfectly safe to use.
Note: While write support is safe in this version (a rewrite from
scratch of the NTFS support), it should be noted that the old NTFS
write support, included in Linux 2.5.10 and before (since 1997),
is not safe.
This is currently useful with TopologiLinux. TopologiLinux is run
on top of any DOS/Microsoft Windows system without partitioning your
hard disk. Unlike other Linux distributions TopologiLinux does not
need its own partition. For more information see
<http://topologi-linux.sourceforge.net/>
It is perfectly safe to say N here.
endmenu
endif
menu "Pseudo filesystems"
config PROC_FS
bool "/proc file system support" if EMBEDDED
default y
help
This is a virtual file system providing information about the status
of the system. "Virtual" means that it doesn't take up any space on
your hard disk: the files are created on the fly by the kernel when
you try to access them. Also, you cannot read the files with older
version of the program less: you need to use more or cat.
It's totally cool; for example, "cat /proc/interrupts" gives
information about what the different IRQs are used for at the moment
(there is a small number of Interrupt ReQuest lines in your computer
that are used by the attached devices to gain the CPU's attention --
often a source of trouble if two devices are mistakenly configured
to use the same IRQ). The program procinfo to display some
information about your system gathered from the /proc file system.
Before you can use the /proc file system, it has to be mounted,
meaning it has to be given a location in the directory hierarchy.
That location should be /proc. A command such as "mount -t proc proc
/proc" or the equivalent line in /etc/fstab does the job.
The /proc file system is explained in the file
<file:Documentation/filesystems/proc.txt> and on the proc(5) manpage
("man 5 proc").
This option will enlarge your kernel by about 67 KB. Several
programs depend on this, so everyone should say Y here.
config PROC_KCORE
bool "/proc/kcore support" if !ARM
depends on PROC_FS && MMU
config PROC_VMCORE
bool "/proc/vmcore support (EXPERIMENTAL)"
depends on PROC_FS && EXPERIMENTAL && CRASH_DUMP
default y
help
Exports the dump image of crashed kernel in ELF format.
config PROC_SYSCTL
bool "Sysctl support (/proc/sys)" if EMBEDDED
depends on PROC_FS
select SYSCTL
default y
---help---
The sysctl interface provides a means of dynamically changing
certain kernel parameters and variables on the fly without requiring
a recompile of the kernel or reboot of the system. The primary
interface is through /proc/sys. If you say Y here a tree of
modifiable sysctl entries will be generated beneath the
/proc/sys directory. They are explained in the files
in <file:Documentation/sysctl/>. Note that enabling this
option will enlarge the kernel by at least 8 KB.
As it is generally a good thing, you should say Y here unless
building a kernel for install/rescue disks or your system is very
limited in memory.
config SYSFS
bool "sysfs file system support" if EMBEDDED
default y
help
The sysfs filesystem is a virtual filesystem that the kernel uses to
export internal kernel objects, their attributes, and their
relationships to one another.
Users can use sysfs to ascertain useful information about the running
kernel, such as the devices the kernel has discovered on each bus and
which driver each is bound to. sysfs can also be used to tune devices
and other kernel subsystems.
Some system agents rely on the information in sysfs to operate.
/sbin/hotplug uses device and object attributes in sysfs to assist in
delegating policy decisions, like persistently naming devices.
sysfs is currently used by the block subsystem to mount the root
partition. If sysfs is disabled you must specify the boot device on
the kernel boot command line via its major and minor numbers. For
example, "root=03:01" for /dev/hda1.
Designers of embedded systems may wish to say N here to conserve space.
config TMPFS
bool "Virtual memory file system support (former shm fs)"
help
Tmpfs is a file system which keeps all files in virtual memory.
Everything in tmpfs is temporary in the sense that no files will be
created on your hard drive. The files live in memory and swap
space. If you unmount a tmpfs instance, everything stored therein is
lost.
See <file:Documentation/filesystems/tmpfs.txt> for details.
config TMPFS_POSIX_ACL
bool "Tmpfs POSIX Access Control Lists"
depends on TMPFS
select GENERIC_ACL
help
POSIX Access Control Lists (ACLs) support permissions for users and
groups beyond the owner/group/world scheme.
To learn more about Access Control Lists, visit the POSIX ACLs for
Linux website <http://acl.bestbits.at/>.
If you don't know what Access Control Lists are, say N.
config HUGETLBFS
bool "HugeTLB file system support"
depends on X86 || IA64 || PPC64 || SPARC64 || (SUPERH && MMU) || BROKEN
help
hugetlbfs is a filesystem backing for HugeTLB pages, based on
ramfs. For architectures that support it, say Y here and read
<file:Documentation/vm/hugetlbpage.txt> for details.
If unsure, say N.
config HUGETLB_PAGE
def_bool HUGETLBFS