Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...

[mirror_ubuntu-bionic-kernel.git] / fs / Kconfig

#
# 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
        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 > /proc/sys/fs/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 > /proc/sys/fs/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
        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
                  - shared writeable mmap
                  - loopback is supported, but data written will not
                    be cluster coherent.
                  - 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 ZISOFS_FS
# for fs/nls/Config.in
        tristate
        depends on ZISOFS
        default ISO9660_FS

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").

          It is now also becoming possible to read and write compressed FAT
          file systems; read <file:Documentation/filesystems/fat_cvf.txt> for
          details.

          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 || 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

config RAMFS
        bool
        default y
        ---help---
          Ramfs is a file system which keeps all files in RAM. It allows
          read and write access.

          It is more of an programming example than a useable file system.  If
          you need a file system which lives in RAM with limit checking use
          tmpfs.

          To compile this as a module, choose M here: the module will be called
          ramfs.

config CONFIGFS_FS
        tristate "Userspace-driven configuration filesystem (EXPERIMENTAL)"
        depends on SYSFS && EXPERIMENTAL
        help
          configfs is a ram-based filesystem that provides the converse
          of sysfs's functionality. Where sysfs is a filesystem-based
          view of kernel objects, configfs is a filesystem-based manager
          of kernel objects, or config_items.

          Both sysfs and configfs can and should exist together on the
          same system. One is not a replacement for the other.

endmenu

menu "Miscellaneous filesystems"

config ADFS_FS
        tristate "ADFS file system support (EXPERIMENTAL)"
        depends on BLOCK && EXPERIMENTAL
        help
          The Acorn Disc Filing System is the standard file system of the
          RiscOS operating system which runs on Acorn's ARM-based Risc PC
          systems and the Acorn Archimedes range of machines. If you say Y
          here, Linux will be able to read from ADFS partitions on hard drives
          and from ADFS-formatted floppy discs. If you also want to be able to
          write to those devices, say Y to "ADFS write support" below.

          The ADFS partition should be the first partition (i.e.,
          /dev/[hs]d?1) on each of your drives. Please read the file
          <file:Documentation/filesystems/adfs.txt> for further details.

          To compile this code as a module, choose M here: the module will be
          called adfs.

          If unsure, say N.

config ADFS_FS_RW
        bool "ADFS write support (DANGEROUS)"
        depends on ADFS_FS
        help
          If you say Y here, you will be able to write to ADFS partitions on
          hard drives and ADFS-formatted floppy disks. This is experimental
          codes, so if you're unsure, say N.

config AFFS_FS
        tristate "Amiga FFS file system support (EXPERIMENTAL)"
        depends on BLOCK && EXPERIMENTAL
        help
          The Fast File System (FFS) is the common file system used on hard
          disks by Amiga(tm) systems since AmigaOS Version 1.3 (34.20).  Say Y
          if you want to be able to read and write files from and to an Amiga
          FFS partition on your hard drive.  Amiga floppies however cannot be
          read with this driver due to an incompatibility of the floppy
          controller used in an Amiga and the standard floppy controller in
          PCs and workstations. Read <file:Documentation/filesystems/affs.txt>
          and <file:fs/affs/Changes>.

          With this driver you can also mount disk files used by Bernd
          Schmidt's Un*X Amiga Emulator
          (<http://www.freiburg.linux.de/~uae/>).
          If you want to do this, you will also need to say Y or M to "Loop
          device support", above.

          To compile this file system support as a module, choose M here: the
          module will be called affs.  If unsure, say N.

config ECRYPT_FS
        tristate "eCrypt filesystem layer support (EXPERIMENTAL)"
        depends on EXPERIMENTAL && KEYS && CRYPTO
        help
          Encrypted filesystem that operates on the VFS layer.  See
          <file:Documentation/ecryptfs.txt> to learn more about
          eCryptfs.  Userspace components are required and can be
          obtained from <http://ecryptfs.sf.net>.

          To compile this file system support as a module, choose M here: the
          module will be called ecryptfs.

config HFS_FS
        tristate "Apple Macintosh file system support (EXPERIMENTAL)"
        depends on BLOCK && EXPERIMENTAL
        select NLS
        help
          If you say Y here, you will be able to mount Macintosh-formatted
          floppy disks and hard drive partitions with full read-write access.
          Please read <file:fs/hfs/HFS.txt> to learn about the available mount
          options.

          To compile this file system support as a module, choose M here: the
          module will be called hfs.

config HFSPLUS_FS
        tristate "Apple Extended HFS file system support"
        depends on BLOCK
        select NLS
        select NLS_UTF8
        help
          If you say Y here, you will be able to mount extended format
          Macintosh-formatted hard drive partitions with full read-write access.

          This file system is often called HFS+ and was introduced with
          MacOS 8. It includes all Mac specific filesystem data such as
          data forks and creator codes, but it also has several UNIX
          style features such as file ownership and permissions.

config BEFS_FS
        tristate "BeOS file system (BeFS) support (read only) (EXPERIMENTAL)"
        depends on BLOCK && EXPERIMENTAL
        select NLS
        help
          The BeOS File System (BeFS) is the native file system of Be, Inc's
          BeOS. Notable features include support for arbitrary attributes
          on files and directories, and database-like indices on selected
          attributes. (Also note that this driver doesn't make those features
          available at this time). It is a 64 bit filesystem, so it supports
          extremely large volumes and files.

          If you use this filesystem, you should also say Y to at least one
          of the NLS (native language support) options below.

          If you don't know what this is about, say N.

          To compile this as a module, choose M here: the module will be
          called befs.

config BEFS_DEBUG
        bool "Debug BeFS"
        depends on BEFS_FS
        help
          If you say Y here, you can use the 'debug' mount option to enable
          debugging output from the driver. 

config BFS_FS
        tristate "BFS file system support (EXPERIMENTAL)"
        depends on BLOCK && EXPERIMENTAL
        help
          Boot File System (BFS) is a file system used under SCO UnixWare to
          allow the bootloader access to the kernel image and other important
          files during the boot process.  It is usually mounted under /stand
          and corresponds to the slice marked as "STAND" in the UnixWare
          partition.  You should say Y if you want to read or write the files
          on your /stand slice from within Linux.  You then also need to say Y
          to "UnixWare slices support", below.  More information about the BFS
          file system is contained in the file
          <file:Documentation/filesystems/bfs.txt>.

          If you don't know what this is about, say N.

          To compile this as a module, choose M here: the module will be called
          bfs.  Note that the file system of your root partition (the one
          containing the directory /) cannot be compiled as a module.



config EFS_FS
        tristate "EFS file system support (read only) (EXPERIMENTAL)"
        depends on BLOCK && EXPERIMENTAL
        help
          EFS is an older file system used for non-ISO9660 CD-ROMs and hard
          disk partitions by SGI's IRIX operating system (IRIX 6.0 and newer
          uses the XFS file system for hard disk partitions however).

          This implementation only offers read-only access. If you don't know
          what all this is about, it's safe to say N. For more information
          about EFS see its home page at <http://aeschi.ch.eu.org/efs/>.

          To compile the EFS file system support as a module, choose M here: the
          module will be called efs.

config JFFS_FS
        tristate "Journalling Flash File System (JFFS) support"
        depends on MTD && BLOCK && BROKEN
        help
          JFFS is the Journalling Flash File System developed by Axis
          Communications in Sweden, aimed at providing a crash/powerdown-safe
          file system for disk-less embedded devices. Further information is
          available at (<http://developer.axis.com/software/jffs/>).

          NOTE: This filesystem is deprecated and is scheduled for removal in
          2.6.21.  See Documentation/feature-removal-schedule.txt

config JFFS_FS_VERBOSE
        int "JFFS debugging verbosity (0 = quiet, 3 = noisy)"
        depends on JFFS_FS
        default "0"
        help
          Determines the verbosity level of the JFFS debugging messages.

config JFFS_PROC_FS
        bool "JFFS stats available in /proc filesystem"
        depends on JFFS_FS && PROC_FS
        help
          Enabling this option will cause statistics from mounted JFFS file systems
          to be made available to the user in the /proc/fs/jffs/ directory.

config JFFS2_FS
        tristate "Journalling Flash File System v2 (JFFS2) support"
        select CRC32
        depends on MTD
        help
          JFFS2 is the second generation of the Journalling Flash File System
          for use on diskless embedded devices. It provides improved wear
          levelling, compression and support for hard links. You cannot use
          this on normal block devices, only on 'MTD' devices.

          Further information on the design and implementation of JFFS2 is
          available at <http://sources.redhat.com/jffs2/>.

config JFFS2_FS_DEBUG
        int "JFFS2 debugging verbosity (0 = quiet, 2 = noisy)"
        depends on JFFS2_FS
        default "0"
        help
          This controls the amount of debugging messages produced by the JFFS2
          code. Set it to zero for use in production systems. For evaluation,
          testing and debugging, it's advisable to set it to one. This will
          enable a few assertions and will print debugging messages at the
          KERN_DEBUG loglevel, where they won't normally be visible. Level 2
          is unlikely to be useful - it enables extra debugging in certain
          areas which at one point needed debugging, but when the bugs were
          located and fixed, the detailed messages were relegated to level 2.

          If reporting bugs, please try to have available a full dump of the
          messages at debug level 1 while the misbehaviour was occurring.

config JFFS2_FS_WRITEBUFFER
        bool "JFFS2 write-buffering support"
        depends on JFFS2_FS
        default y
        help
          This enables the write-buffering support in JFFS2.

          This functionality is required to support JFFS2 on the following
          types of flash devices:
            - NAND flash
            - NOR flash with transparent ECC
            - DataFlash

config JFFS2_SUMMARY
        bool "JFFS2 summary support (EXPERIMENTAL)"
        depends on JFFS2_FS && EXPERIMENTAL
        default n
        help
          This feature makes it possible to use summary information
          for faster filesystem mount.

          The summary information can be inserted into a filesystem image
          by the utility 'sumtool'.

          If unsure, say 'N'.

config JFFS2_FS_XATTR
        bool "JFFS2 XATTR support (EXPERIMENTAL)"
        depends on JFFS2_FS && EXPERIMENTAL
        default n
        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 JFFS2_FS_POSIX_ACL
        bool "JFFS2 POSIX Access Control Lists"
        depends on JFFS2_FS_XATTR
        default y
        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 JFFS2_FS_SECURITY
        bool "JFFS2 Security Labels"
        depends on JFFS2_FS_XATTR
        default y
        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 jffs2 filesystem.
          
          If you are not using a security module that requires using
          extended attributes for file security labels, say N.

config JFFS2_COMPRESSION_OPTIONS
        bool "Advanced compression options for JFFS2"
        depends on JFFS2_FS
        default n
        help
          Enabling this option allows you to explicitly choose which
          compression modules, if any, are enabled in JFFS2. Removing
          compressors and mean you cannot read existing file systems,
          and enabling experimental compressors can mean that you
          write a file system which cannot be read by a standard kernel.

          If unsure, you should _definitely_ say 'N'.

config JFFS2_ZLIB
        bool "JFFS2 ZLIB compression support" if JFFS2_COMPRESSION_OPTIONS
        select ZLIB_INFLATE
        select ZLIB_DEFLATE
        depends on JFFS2_FS
        default y
        help
          Zlib is designed to be a free, general-purpose, legally unencumbered,
          lossless data-compression library for use on virtually any computer
          hardware and operating system. See <http://www.gzip.org/zlib/> for
          further information.

          Say 'Y' if unsure.

config JFFS2_RTIME
        bool "JFFS2 RTIME compression support" if JFFS2_COMPRESSION_OPTIONS
        depends on JFFS2_FS
        default y
        help
          Rtime does manage to recompress already-compressed data. Say 'Y' if unsure.

config JFFS2_RUBIN
        bool "JFFS2 RUBIN compression support" if JFFS2_COMPRESSION_OPTIONS
        depends on JFFS2_FS
        default n
        help
          RUBINMIPS and DYNRUBIN compressors. Say 'N' if unsure.

choice
        prompt "JFFS2 default compression mode" if JFFS2_COMPRESSION_OPTIONS
        default JFFS2_CMODE_PRIORITY
        depends on JFFS2_FS
        help
          You can set here the default compression mode of JFFS2 from
          the available compression modes. Don't touch if unsure.

config JFFS2_CMODE_NONE
        bool "no compression"
        help
          Uses no compression.

config JFFS2_CMODE_PRIORITY
        bool "priority"
        help
          Tries the compressors in a predefined order and chooses the first
          successful one.

config JFFS2_CMODE_SIZE
        bool "size (EXPERIMENTAL)"
        help
          Tries all compressors and chooses the one which has the smallest
          result.

endchoice

config CRAMFS
        tristate "Compressed ROM file system support (cramfs)"
        depends on BLOCK
        select ZLIB_INFLATE
        help
          Saying Y here includes support for CramFs (Compressed ROM File
          System).  CramFs is designed to be a simple, small, and compressed
          file system for ROM based embedded systems.  CramFs is read-only,
          limited to 256MB file systems (with 16MB files), and doesn't support
          16/32 bits uid/gid, hard links and timestamps.

          See <file:Documentation/filesystems/cramfs.txt> and
          <file:fs/cramfs/README> for further information.

          To compile this as a module, choose M here: the module will be called
          cramfs.  Note that the root file system (the one containing the
          directory /) cannot be compiled as a module.

          If unsure, say N.

config VXFS_FS
        tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
        depends on BLOCK
        help
          FreeVxFS is a file system driver that support the VERITAS VxFS(TM)
          file system format.  VERITAS VxFS(TM) is the standard file system
          of SCO UnixWare (and possibly others) and optionally available
          for Sunsoft Solaris, HP-UX and many other operating systems.
          Currently only readonly access is supported.

          NOTE: the file system type as used by mount(1), mount(2) and
          fstab(5) is 'vxfs' as it describes the file system format, not
          the actual driver.

          To compile this as a module, choose M here: the module will be
          called freevxfs.  If unsure, say N.


config HPFS_FS
        tristate "OS/2 HPFS file system support"
        depends on BLOCK
        help
          OS/2 is IBM's operating system for PC's, the same as Warp, and HPFS
          is the file system used for organizing files on OS/2 hard disk
          partitions. Say Y if you want to be able to read files from and
          write files to an OS/2 HPFS partition on your hard drive. OS/2
          floppies however are in regular MSDOS format, so you don't need this
          option in order to be able to read them. Read
          <file:Documentation/filesystems/hpfs.txt>.

          To compile this file system support as a module, choose M here: the
          module will be called hpfs.  If unsure, say N.



config QNX4FS_FS
        tristate "QNX4 file system support (read only)"
        depends on BLOCK
        help
          This is the file system used by the real-time operating systems
          QNX 4 and QNX 6 (the latter is also called QNX RTP).
          Further information is available at <http://www.qnx.com/>.
          Say Y if you intend to mount QNX hard disks or floppies.
          Unless you say Y to "QNX4FS read-write support" below, you will
          only be able to read these file systems.

          To compile this file system support as a module, choose M here: the
          module will be called qnx4.

          If you don't know whether you need it, then you don't need it:
          answer N.

config QNX4FS_RW
        bool "QNX4FS write support (DANGEROUS)"
        depends on QNX4FS_FS && EXPERIMENTAL && BROKEN
        help
          Say Y if you want to test write support for QNX4 file systems.

          It's currently broken, so for now:
          answer N.



config SYSV_FS
        tristate "System V/Xenix/V7/Coherent file system support"
        depends on BLOCK
        help
          SCO, Xenix and Coherent are commercial Unix systems for Intel
          machines, and Version 7 was used on the DEC PDP-11. Saying Y
          here would allow you to read from their floppies and hard disk
          partitions.

          If you have floppies or hard disk partitions like that, it is likely
          that they contain binaries from those other Unix systems; in order
          to run these binaries, you will want to install linux-abi which is
          a set of kernel modules that lets you run SCO, Xenix, Wyse,
          UnixWare, Dell Unix and System V programs under Linux.  It is
          available via FTP (user: ftp) from
          <ftp://ftp.openlinux.org/pub/people/hch/linux-abi/>).
          NOTE: that will work only for binaries from Intel-based systems;
          PDP ones will have to wait until somebody ports Linux to -11 ;-)

          If you only intend to mount files from some other Unix over the
          network using NFS, you don't need the System V file system support
          (but you need NFS file system support obviously).

          Note that this option is generally not needed for floppies, since a
          good portable way to transport files and directories between unixes
          (and even other operating systems) is given by the tar program ("man
          tar" or preferably "info tar").  Note also that this option has
          nothing whatsoever to do with the option "System V IPC". Read about
          the System V file system in
          <file:Documentation/filesystems/sysv-fs.txt>.
          Saying Y here will enlarge your kernel by about 27 KB.

          To compile this as a module, choose M here: the module will be called
          sysv.

          If you haven't heard about all of this before, it's safe to say N.



config UFS_FS
        tristate "UFS file system support (read only)"
        depends on BLOCK
        help
          BSD and derivate versions of Unix (such as SunOS, FreeBSD, NetBSD,
          OpenBSD and NeXTstep) use a file system called UFS. Some System V
          Unixes can create and mount hard disk partitions and diskettes using
          this file system as well. Saying Y here will allow you to read from
          these partitions; if you also want to write to them, say Y to the
          experimental "UFS file system write support", below. Please read the
          file <file:Documentation/filesystems/ufs.txt> for more information.

          The recently released UFS2 variant (used in FreeBSD 5.x) is
          READ-ONLY supported.

          If you only intend to mount files from some other Unix over the
          network using NFS, you don't need the UFS file system support (but
          you need NFS file system support obviously).

          Note that this option is generally not needed for floppies, since a
          good portable way to transport files and directories between unixes
          (and even other operating systems) is given by the tar program ("man
          tar" or preferably "info tar").

          When accessing NeXTstep files, you may need to convert them from the
          NeXT character set to the Latin1 character set; use the program
          recode ("info recode") for this purpose.

          To compile the UFS file system support as a module, choose M here: the
          module will be called ufs.

          If you haven't heard about all of this before, it's safe to say N.

config UFS_FS_WRITE
        bool "UFS file system write support (DANGEROUS)"
        depends on UFS_FS && EXPERIMENTAL
        help
          Say Y here if you want to try writing to UFS partitions. This is
          experimental, so you should back up your UFS partitions beforehand.

config UFS_DEBUG
        bool "UFS debugging"
        depends on UFS_FS
        help
          If you are experiencing any problems with the UFS filesystem, say
          Y here.  This will result in _many_ additional debugging messages to be
          written to the system log.

endmenu

menu "Network File Systems"
        depends on NET

config NFS_FS
        tristate "NFS file system support"
        depends on INET
        select LOCKD
        select SUNRPC
        select NFS_ACL_SUPPORT if NFS_V3_ACL
        help
          If you are connected to some other (usually local) Unix computer
          (using SLIP, PLIP, PPP or Ethernet) and want to mount files residing
          on that computer (the NFS server) using the Network File Sharing
          protocol, say Y. "Mounting files" means that the client can access
          the files with usual UNIX commands as if they were sitting on the
          client's hard disk. For this to work, the server must run the
          programs nfsd and mountd (but does not need to have NFS file system
          support enabled in its kernel). NFS is explained in the Network
          Administrator's Guide, available from
          <http://www.tldp.org/docs.html#guide>, on its man page: "man
          nfs", and in the NFS-HOWTO.

          A superior but less widely used alternative to NFS is provided by
          the Coda file system; see "Coda file system support" below.

          If you say Y here, you should have said Y to TCP/IP networking also.
          This option would enlarge your kernel by about 27 KB.

          To compile this file system support as a module, choose M here: the
          module will be called nfs.

          If you are configuring a diskless machine which will mount its root
          file system over NFS at boot time, say Y here and to "Kernel
          level IP autoconfiguration" above and to "Root file system on NFS"
          below. You cannot compile this driver as a module in this case.
          There are two packages designed for booting diskless machines over
          the net: netboot, available from
          <http://ftp1.sourceforge.net/netboot/>, and Etherboot,
          available from <http://ftp1.sourceforge.net/etherboot/>.

          If you don't know what all this is about, say N.

config NFS_V3
        bool "Provide NFSv3 client support"
        depends on NFS_FS
        help
          Say Y here if you want your NFS client to be able to speak version
          3 of the NFS protocol.

          If unsure, say Y.

config NFS_V3_ACL
        bool "Provide client support for the NFSv3 ACL protocol extension"
        depends on NFS_V3
        help
          Implement the NFSv3 ACL protocol extension for manipulating POSIX
          Access Control Lists.  The server should also be compiled with
          the NFSv3 ACL protocol extension; see the CONFIG_NFSD_V3_ACL option.

          If unsure, say N.

config NFS_V4
        bool "Provide NFSv4 client support (EXPERIMENTAL)"
        depends on NFS_FS && EXPERIMENTAL
        select RPCSEC_GSS_KRB5
        help
          Say Y here if you want your NFS client to be able to speak the newer
          version 4 of the NFS protocol.

          Note: Requires auxiliary userspace daemons which may be found on
                http://www.citi.umich.edu/projects/nfsv4/

          If unsure, say N.

config NFS_DIRECTIO
        bool "Allow direct I/O on NFS files"
        depends on NFS_FS
        help
          This option enables applications to perform uncached I/O on files
          in NFS file systems using the O_DIRECT open() flag.  When O_DIRECT
          is set for a file, its data is not cached in the system's page
          cache.  Data is moved to and from user-level application buffers
          directly.  Unlike local disk-based file systems, NFS O_DIRECT has
          no alignment restrictions.

          Unless your program is designed to use O_DIRECT properly, you are
          much better off allowing the NFS client to manage data caching for
          you.  Misusing O_DIRECT can cause poor server performance or network
          storms.  This kernel build option defaults OFF to avoid exposing
          system administrators unwittingly to a potentially hazardous
          feature.

          For more details on NFS O_DIRECT, see fs/nfs/direct.c.

          If unsure, say N.  This reduces the size of the NFS client, and
          causes open() to return EINVAL if a file residing in NFS is
          opened with the O_DIRECT flag.

config NFSD
        tristate "NFS server support"
        depends on INET
        select LOCKD
        select SUNRPC
        select EXPORTFS
        select NFSD_V2_ACL if NFSD_V3_ACL
        select NFS_ACL_SUPPORT if NFSD_V2_ACL
        select NFSD_TCP if NFSD_V4
        select CRYPTO_MD5 if NFSD_V4
        select CRYPTO if NFSD_V4
        select FS_POSIX_ACL if NFSD_V4
        help
          If you want your Linux box to act as an NFS *server*, so that other
          computers on your local network which support NFS can access certain
          directories on your box transparently, you have two options: you can
          use the self-contained user space program nfsd, in which case you
          should say N here, or you can say Y and use the kernel based NFS
          server. The advantage of the kernel based solution is that it is
          faster.

          In either case, you will need support software; the respective
          locations are given in the file <file:Documentation/Changes> in the
          NFS section.

          If you say Y here, you will get support for version 2 of the NFS
          protocol (NFSv2). If you also want NFSv3, say Y to the next question
          as well.

          Please read the NFS-HOWTO, available from
          <http://www.tldp.org/docs.html#howto>.

          To compile the NFS server support as a module, choose M here: the
          module will be called nfsd.  If unsure, say N.

config NFSD_V2_ACL
        bool
        depends on NFSD

config NFSD_V3
        bool "Provide NFSv3 server support"
        depends on NFSD
        help
          If you would like to include the NFSv3 server as well as the NFSv2
          server, say Y here.  If unsure, say Y.

config NFSD_V3_ACL
        bool "Provide server support for the NFSv3 ACL protocol extension"
        depends on NFSD_V3
        help
          Implement the NFSv3 ACL protocol extension for manipulating POSIX
          Access Control Lists on exported file systems. NFS clients should
          be compiled with the NFSv3 ACL protocol extension; see the
          CONFIG_NFS_V3_ACL option.  If unsure, say N.

config NFSD_V4
        bool "Provide NFSv4 server support (EXPERIMENTAL)"
        depends on NFSD_V3 && EXPERIMENTAL
        help
          If you would like to include the NFSv4 server as well as the NFSv2
          and NFSv3 servers, say Y here.  This feature is experimental, and
          should only be used if you are interested in helping to test NFSv4.
          If unsure, say N.

config NFSD_TCP
        bool "Provide NFS server over TCP support"
        depends on NFSD
        default y
        help
          If you want your NFS server to support TCP connections, say Y here.
          TCP connections usually perform better than the default UDP when
          the network is lossy or congested.  If unsure, say Y.

config ROOT_NFS
        bool "Root file system on NFS"
        depends on NFS_FS=y && IP_PNP
        help
          If you want your Linux box to mount its whole root file system (the
          one containing the directory /) from some other computer over the
          net via NFS (presumably because your box doesn't have a hard disk),
          say Y. Read <file:Documentation/nfsroot.txt> for details. It is
          likely that in this case, you also want to say Y to "Kernel level IP
          autoconfiguration" so that your box can discover its network address
          at boot time.

          Most people say N here.

config LOCKD
        tristate

config LOCKD_V4
        bool
        depends on NFSD_V3 || NFS_V3
        default y

config EXPORTFS
        tristate

config NFS_ACL_SUPPORT
        tristate
        select FS_POSIX_ACL

config NFS_COMMON
        bool
        depends on NFSD || NFS_FS
        default y

config SUNRPC
        tristate

config SUNRPC_GSS
        tristate

config RPCSEC_GSS_KRB5
        tristate "Secure RPC: Kerberos V mechanism (EXPERIMENTAL)"
        depends on SUNRPC && EXPERIMENTAL
        select SUNRPC_GSS
        select CRYPTO
        select CRYPTO_MD5
        select CRYPTO_DES
        select CRYPTO_CBC
        help
          Provides for secure RPC calls by means of a gss-api
          mechanism based on Kerberos V5. This is required for
          NFSv4.

          Note: Requires an auxiliary userspace daemon which may be found on
                http://www.citi.umich.edu/projects/nfsv4/

          If unsure, say N.

config RPCSEC_GSS_SPKM3
        tristate "Secure RPC: SPKM3 mechanism (EXPERIMENTAL)"
        depends on SUNRPC && EXPERIMENTAL
        select SUNRPC_GSS
        select CRYPTO
        select CRYPTO_MD5
        select CRYPTO_DES
        select CRYPTO_CAST5
        select CRYPTO_CBC
        help
          Provides for secure RPC calls by means of a gss-api
          mechanism based on the SPKM3 public-key mechanism.

          Note: Requires an auxiliary userspace daemon which may be found on
                http://www.citi.umich.edu/projects/nfsv4/

          If unsure, say N.

config SMB_FS
        tristate "SMB file system support (to mount Windows shares etc.)"
        depends on INET
        select NLS
        help
          SMB (Server Message Block) is the protocol Windows for Workgroups
          (WfW), Windows 95/98, Windows NT and OS/2 Lan Manager use to share
          files and printers over local networks.  Saying Y here allows you to
          mount their file systems (often called "shares" in this context) and
          access them just like any other Unix directory.  Currently, this
          works only if the Windows machines use TCP/IP as the underlying
          transport protocol, and not NetBEUI.  For details, read
          <file:Documentation/filesystems/smbfs.txt> and the SMB-HOWTO,
          available from <http://www.tldp.org/docs.html#howto>.

          Note: if you just want your box to act as an SMB *server* and make
          files and printing services available to Windows clients (which need
          to have a TCP/IP stack), you don't need to say Y here; you can use
          the program SAMBA (available from <ftp://ftp.samba.org/pub/samba/>)
          for that.

          General information about how to connect Linux, Windows machines and
          Macs is on the WWW at <http://www.eats.com/linux_mac_win.html>.

          To compile the SMB support as a module, choose M here: the module will
          be called smbfs.  Most people say N, however.

config SMB_NLS_DEFAULT
        bool "Use a default NLS"
        depends on SMB_FS
        help
          Enabling this will make smbfs use nls translations by default. You
          need to specify the local charset (CONFIG_NLS_DEFAULT) in the nls
          settings and you need to give the default nls for the SMB server as
          CONFIG_SMB_NLS_REMOTE.

          The nls settings can be changed at mount time, if your smbmount
          supports that, using the codepage and iocharset parameters.

          smbmount from samba 2.2.0 or later supports this.

config SMB_NLS_REMOTE
        string "Default Remote NLS Option"
        depends on SMB_NLS_DEFAULT
        default "cp437"
        help
          This setting allows you to specify a default value for which
          codepage the server uses. If this field is left blank no
          translations will be done by default. The local codepage/charset
          default to CONFIG_NLS_DEFAULT.

          The nls settings can be changed at mount time, if your smbmount
          supports that, using the codepage and iocharset parameters.

          smbmount from samba 2.2.0 or later supports this.

config CIFS
        tristate "CIFS support (advanced network filesystem for Samba, Window and other CIFS compliant servers)"
        depends on INET
        select NLS
        help
          This is the client VFS module for the Common Internet File System
          (CIFS) protocol which is the successor to the Server Message Block 
          (SMB) protocol, the native file sharing mechanism for most early
          PC operating systems.  The CIFS protocol is fully supported by 
          file servers such as Windows 2000 (including Windows 2003, NT 4  
          and Windows XP) as well by Samba (which provides excellent CIFS
          server support for Linux and many other operating systems). Limited
          support for Windows ME and similar servers is provided as well. 
          You must use the smbfs client filesystem to access older SMB servers
          such as OS/2 and DOS.

          The intent of the cifs module is to provide an advanced
          network file system client for mounting to CIFS compliant servers, 
          including support for dfs (hierarchical name space), secure per-user
          session establishment, safe distributed caching (oplock), optional
          packet signing, Unicode and other internationalization improvements, 
          and optional Winbind (nsswitch) integration. You do not need to enable
          cifs if running only a (Samba) server. It is possible to enable both
          smbfs and cifs (e.g. if you are using CIFS for accessing Windows 2003
          and Samba 3 servers, and smbfs for accessing old servers). If you need 
          to mount to Samba or Windows from this machine, say Y.

config CIFS_STATS
        bool "CIFS statistics"
        depends on CIFS
        help
          Enabling this option will cause statistics for each server share
          mounted by the cifs client to be displayed in /proc/fs/cifs/Stats

config CIFS_STATS2
        bool "Extended statistics"
        depends on CIFS_STATS
        help
          Enabling this option will allow more detailed statistics on SMB
          request timing to be displayed in /proc/fs/cifs/DebugData and also
          allow optional logging of slow responses to dmesg (depending on the
          value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
          These additional statistics may have a minor effect on performance
          and memory utilization.

          Unless you are a developer or are doing network performance analysis
          or tuning, say N.

config CIFS_WEAK_PW_HASH
        bool "Support legacy servers which use weaker LANMAN security"
        depends on CIFS
        help
          Modern CIFS servers including Samba and most Windows versions
          (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
          security mechanisms. These hash the password more securely
          than the mechanisms used in the older LANMAN version of the
          SMB protocol needed to establish sessions with old SMB servers.

          Enabling this option allows the cifs module to mount to older
          LANMAN based servers such as OS/2 and Windows 95, but such
          mounts may be less secure than mounts using NTLM or more recent
          security mechanisms if you are on a public network.  Unless you
          have a need to access old SMB servers (and are on a private 
          network) you probably want to say N.  Even if this support
          is enabled in the kernel build, they will not be used
          automatically. At runtime LANMAN mounts are disabled but
          can be set to required (or optional) either in
          /proc/fs/cifs (see fs/cifs/README for more detail) or via an
          option on the mount command. This support is disabled by 
          default in order to reduce the possibility of a downgrade
          attack.
 
          If unsure, say N.

config CIFS_XATTR
        bool "CIFS extended attributes"
        depends on CIFS
        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).  CIFS maps the name of
          extended attributes beginning with the user namespace prefix
          to SMB/CIFS EAs. EAs are stored on Windows servers without the
          user namespace prefix, but their names are seen by Linux cifs clients
          prefaced by the user namespace prefix. The system namespace
          (used by some filesystems to store ACLs) is not supported at
          this time.

          If unsure, say N.

config CIFS_POSIX
        bool "CIFS POSIX Extensions"
        depends on CIFS_XATTR
        help
          Enabling this option will cause the cifs client to attempt to
          negotiate a newer dialect with servers, such as Samba 3.0.5
          or later, that optionally can handle more POSIX like (rather
          than Windows like) file behavior.  It also enables
          support for POSIX ACLs (getfacl and setfacl) to servers
          (such as Samba 3.10 and later) which can negotiate
          CIFS POSIX ACL support.  If unsure, say N.

config CIFS_DEBUG2
        bool "Enable additional CIFS debugging routines"
        depends on CIFS
        help
           Enabling this option adds a few more debugging routines
           to the cifs code which slightly increases the size of
           the cifs module and can cause additional logging of debug
           messages in some error paths, slowing performance. This
           option can be turned off unless you are debugging
           cifs problems.  If unsure, say N.
           
config CIFS_EXPERIMENTAL
          bool "CIFS Experimental Features (EXPERIMENTAL)"
          depends on CIFS && EXPERIMENTAL
          help
            Enables cifs features under testing. These features are
            experimental and currently include support for writepages
            (multipage writebehind performance improvements) and directory
            change notification ie fcntl(F_DNOTIFY) as well as some security
            improvements.  Some also depend on setting at runtime the
            pseudo-file /proc/fs/cifs/Experimental (which is disabled by
            default). See the file fs/cifs/README for more details.

            If unsure, say N.

config CIFS_UPCALL
          bool "Kerberos/SPNEGO advanced session setup (EXPERIMENTAL)"
          depends on CIFS_EXPERIMENTAL
          depends on CONNECTOR
          help
            Enables an upcall mechanism for CIFS which will be used to contact
            userspace helper utilities to provide SPNEGO packaged Kerberos
            tickets which are needed to mount to certain secure servers
            (for which more secure Kerberos authentication is required). If
            unsure, say N.

config NCP_FS
        tristate "NCP file system support (to mount NetWare volumes)"
        depends on IPX!=n || INET
        help
          NCP (NetWare Core Protocol) is a protocol that runs over IPX and is
          used by Novell NetWare clients to talk to file servers.  It is to
          IPX what NFS is to TCP/IP, if that helps.  Saying Y here allows you
          to mount NetWare file server volumes and to access them just like
          any other Unix directory.  For details, please read the file
          <file:Documentation/filesystems/ncpfs.txt> in the kernel source and
          the IPX-HOWTO from <http://www.tldp.org/docs.html#howto>.

          You do not have to say Y here if you want your Linux box to act as a
          file *server* for Novell NetWare clients.

          General information about how to connect Linux, Windows machines and
          Macs is on the WWW at <http://www.eats.com/linux_mac_win.html>.

          To compile this as a module, choose M here: the module will be called
          ncpfs.  Say N unless you are connected to a Novell network.

source "fs/ncpfs/Kconfig"

config CODA_FS
        tristate "Coda file system support (advanced network fs)"
        depends on INET
        help
          Coda is an advanced network file system, similar to NFS in that it
          enables you to mount file systems of a remote server and access them
          with regular Unix commands as if they were sitting on your hard
          disk.  Coda has several advantages over NFS: support for
          disconnected operation (e.g. for laptops), read/write server
          replication, security model for authentication and encryption,
          persistent client caches and write back caching.

          If you say Y here, your Linux box will be able to act as a Coda
          *client*.  You will need user level code as well, both for the
          client and server.  Servers are currently user level, i.e. they need
          no kernel support.  Please read
          <file:Documentation/filesystems/coda.txt> and check out the Coda
          home page <http://www.coda.cs.cmu.edu/>.

          To compile the coda client support as a module, choose M here: the
          module will be called coda.

config CODA_FS_OLD_API
        bool "Use 96-bit Coda file identifiers"
        depends on CODA_FS
        help
          A new kernel-userspace API had to be introduced for Coda v6.0
          to support larger 128-bit file identifiers as needed by the
          new realms implementation.

          However this new API is not backward compatible with older
          clients. If you really need to run the old Coda userspace
          cache manager then say Y.
          
          For most cases you probably want to say N.

config AFS_FS
        tristate "Andrew File System support (AFS) (EXPERIMENTAL)"
        depends on INET && EXPERIMENTAL
        select RXRPC
        help
          If you say Y here, you will get an experimental Andrew File System
          driver. It currently only supports unsecured read-only AFS access.

          See <file:Documentation/filesystems/afs.txt> for more information.

          If unsure, say N.

config RXRPC
        tristate

config 9P_FS
        tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
        depends on INET && EXPERIMENTAL
        help
          If you say Y here, you will get experimental support for
          Plan 9 resource sharing via the 9P2000 protocol.

          See <http://v9fs.sf.net> for more information.

          If unsure, say N.

endmenu

if BLOCK
menu "Partition Types"

source "fs/partitions/Kconfig"

endmenu
endif

source "fs/nls/Kconfig"
source "fs/dlm/Kconfig"

endmenu