fs/ext3/Kconfig

   1 config EXT3_FS
   2         tristate "Ext3 journalling file system support"
   3         select JBD
   4         help
   5           This is the journalling version of the Second extended file system
   6           (often called ext3), the de facto standard Linux file system
   7           (method to organize files on a storage device) for hard disks.
   8
   9           The journalling code included in this driver means you do not have
  10           to run e2fsck (file system checker) on your file systems after a
  11           crash.  The journal keeps track of any changes that were being made
  12           at the time the system crashed, and can ensure that your file system
  13           is consistent without the need for a lengthy check.
  14
  15           Other than adding the journal to the file system, the on-disk format
  16           of ext3 is identical to ext2.  It is possible to freely switch
  17           between using the ext3 driver and the ext2 driver, as long as the
  18           file system has been cleanly unmounted, or e2fsck is run on the file
  19           system.
  20
  21           To add a journal on an existing ext2 file system or change the
  22           behavior of ext3 file systems, you can use the tune2fs utility ("man
  23           tune2fs").  To modify attributes of files and directories on ext3
  24           file systems, use chattr ("man chattr").  You need to be using
  25           e2fsprogs version 1.20 or later in order to create ext3 journals
  26           (available at <http://sourceforge.net/projects/e2fsprogs/>).
  27
  28           To compile this file system support as a module, choose M here: the
  29           module will be called ext3.
  30
  31 config EXT3_DEFAULTS_TO_ORDERED
  32         bool "Default to 'data=ordered' in ext3 (legacy option)"
  33         depends on EXT3_FS
  34         help
  35           If a filesystem does not explicitly specify a data ordering
  36           mode, and the journal capability allowed it, ext3 used to
  37           historically default to 'data=ordered'.
  38
  39           That was a rather unfortunate choice, because it leads to all
  40           kinds of latency problems, and the 'data=writeback' mode is more
  41           appropriate these days.
  42
  43           You should probably always answer 'n' here, and if you really
  44           want to use 'data=ordered' mode, set it in the filesystem itself
  45           with 'tune2fs -o journal_data_ordered'.
  46
  47           But if you really want to enable the legacy default, you can do
  48           so by answering 'y' to this question.
  49
  50 config EXT3_FS_XATTR
  51         bool "Ext3 extended attributes"
  52         depends on EXT3_FS
  53         default y
  54         help
  55           Extended attributes are name:value pairs associated with inodes by
  56           the kernel or by users (see the attr(5) manual page, or visit
  57           <http://acl.bestbits.at/> for details).
  58
  59           If unsure, say N.
  60
  61           You need this for POSIX ACL support on ext3.
  62
  63 config EXT3_FS_POSIX_ACL
  64         bool "Ext3 POSIX Access Control Lists"
  65         depends on EXT3_FS_XATTR
  66         select FS_POSIX_ACL
  67         help
  68           Posix Access Control Lists (ACLs) support permissions for users and
  69           groups beyond the owner/group/world scheme.
  70
  71           To learn more about Access Control Lists, visit the Posix ACLs for
  72           Linux website <http://acl.bestbits.at/>.
  73
  74           If you don't know what Access Control Lists are, say N
  75
  76 config EXT3_FS_SECURITY
  77         bool "Ext3 Security Labels"
  78         depends on EXT3_FS_XATTR
  79         help
  80           Security labels support alternative access control models
  81           implemented by security modules like SELinux.  This option
  82           enables an extended attribute handler for file security
  83           labels in the ext3 filesystem.
  84
  85           If you are not using a security module that requires using
  86           extended attributes for file security labels, say N.