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1config 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
31config 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
50config 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
63config 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
76config 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.