1 # SPDX-License-Identifier: GPL-2.0-only <<
2 # Ext3 configs are here for backward compatibi <<
3 # have EXT3_FS set but not EXT4_FS set and thu <<
4 # kernels after the removal of ext3 driver. <<
5 config EXT3_FS <<
6 tristate "The Extended 3 (ext3) filesy <<
7 select EXT4_FS <<
8 help <<
9 This config option is here only for <<
10 filesystem is now handled by the ext <<
11 <<
12 config EXT3_FS_POSIX_ACL <<
13 bool "Ext3 POSIX Access Control Lists" <<
14 depends on EXT3_FS <<
15 select EXT4_FS_POSIX_ACL <<
16 select FS_POSIX_ACL <<
17 help <<
18 This config option is here only for <<
19 filesystem is now handled by the ext <<
20 <<
21 config EXT3_FS_SECURITY <<
22 bool "Ext3 Security Labels" <<
23 depends on EXT3_FS <<
24 select EXT4_FS_SECURITY <<
25 help <<
26 This config option is here only for <<
27 filesystem is now handled by the ext <<
28 <<
29 config EXT4_FS 1 config EXT4_FS
30 tristate "The Extended 4 (ext4) filesy 2 tristate "The Extended 4 (ext4) filesystem"
31 select BUFFER_HEAD <<
32 select JBD2 3 select JBD2
33 select CRC16 4 select CRC16
34 select CRYPTO 5 select CRYPTO
35 select CRYPTO_CRC32C 6 select CRYPTO_CRC32C
36 select FS_IOMAP <<
37 select FS_ENCRYPTION_ALGS if FS_ENCRYP <<
38 help 7 help
39 This is the next generation of the e 8 This is the next generation of the ext3 filesystem.
40 9
41 Unlike the change from ext2 filesyst 10 Unlike the change from ext2 filesystem to ext3 filesystem,
42 the on-disk format of ext4 is not fo 11 the on-disk format of ext4 is not forwards compatible with
43 ext3; it is based on extent maps and 12 ext3; it is based on extent maps and it supports 48-bit
44 physical block numbers. The ext4 fi 13 physical block numbers. The ext4 filesystem also supports delayed
45 allocation, persistent preallocation 14 allocation, persistent preallocation, high resolution time stamps,
46 and a number of other features to im 15 and a number of other features to improve performance and speed
47 up fsck time. For more information, 16 up fsck time. For more information, please see the web pages at
48 http://ext4.wiki.kernel.org. 17 http://ext4.wiki.kernel.org.
49 18
50 The ext4 filesystem supports mountin !! 19 The ext4 filesystem will support mounting an ext3
51 are some performance gains from the !! 20 filesystem; while there will be some performance gains from
52 table readahead, the best performanc !! 21 the delayed allocation and inode table readahead, the best
53 features in the filesystem using tun !! 22 performance gains will require enabling ext4 features in the
54 filesystem as an ext4 filesystem ini !! 23 filesystem, or formatting a new filesystem as an ext4
55 of ext4 features, the on disk filesy !! 24 filesystem initially.
56 compatible. <<
57 25
58 To compile this file system support 26 To compile this file system support as a module, choose M here. The
59 module will be called ext4. 27 module will be called ext4.
60 28
61 If unsure, say N. 29 If unsure, say N.
62 30
63 config EXT4_USE_FOR_EXT2 !! 31 config EXT4_USE_FOR_EXT23
64 bool "Use ext4 for ext2 file systems" !! 32 bool "Use ext4 for ext2/ext3 file systems"
65 depends on EXT4_FS 33 depends on EXT4_FS
66 depends on EXT2_FS=n !! 34 depends on EXT3_FS=n || EXT2_FS=n
67 default y 35 default y
68 help 36 help
69 Allow the ext4 file system driver co !! 37 Allow the ext4 file system driver code to be used for ext2 or
70 file system mounts. This allows use !! 38 ext3 file system mounts. This allows users to reduce their
71 compiled kernel size by using one fi 39 compiled kernel size by using one file system driver for
72 ext2, ext3, and ext4 file systems. 40 ext2, ext3, and ext4 file systems.
73 41
74 config EXT4_FS_POSIX_ACL 42 config EXT4_FS_POSIX_ACL
75 bool "Ext4 POSIX Access Control Lists" 43 bool "Ext4 POSIX Access Control Lists"
76 depends on EXT4_FS 44 depends on EXT4_FS
77 select FS_POSIX_ACL 45 select FS_POSIX_ACL
78 help 46 help
79 POSIX Access Control Lists (ACLs) su 47 POSIX Access Control Lists (ACLs) support permissions for users and
80 groups beyond the owner/group/world 48 groups beyond the owner/group/world scheme.
81 49
>> 50 To learn more about Access Control Lists, visit the POSIX ACLs for
>> 51 Linux website <http://acl.bestbits.at/>.
>> 52
82 If you don't know what Access Contro 53 If you don't know what Access Control Lists are, say N
83 54
84 config EXT4_FS_SECURITY 55 config EXT4_FS_SECURITY
85 bool "Ext4 Security Labels" 56 bool "Ext4 Security Labels"
86 depends on EXT4_FS 57 depends on EXT4_FS
87 help 58 help
88 Security labels support alternative 59 Security labels support alternative access control models
89 implemented by security modules like 60 implemented by security modules like SELinux. This option
90 enables an extended attribute handle 61 enables an extended attribute handler for file security
91 labels in the ext4 filesystem. 62 labels in the ext4 filesystem.
92 63
93 If you are not using a security modu 64 If you are not using a security module that requires using
94 extended attributes for file securit 65 extended attributes for file security labels, say N.
95 66
96 config EXT4_DEBUG 67 config EXT4_DEBUG
97 bool "Ext4 debugging support" !! 68 bool "EXT4 debugging support"
98 depends on EXT4_FS 69 depends on EXT4_FS
99 help 70 help
100 Enables run-time debugging support f 71 Enables run-time debugging support for the ext4 filesystem.
101 72
102 If you select Y here, then you will 73 If you select Y here, then you will be able to turn on debugging
103 using dynamic debug control for mb_d !! 74 with a command such as:
104 !! 75 echo 1 > /sys/module/ext4/parameters/mballoc_debug
105 config EXT4_KUNIT_TESTS <<
106 tristate "KUnit tests for ext4" if !KU <<
107 depends on EXT4_FS && KUNIT <<
108 default KUNIT_ALL_TESTS <<
109 help <<
110 This builds the ext4 KUnit tests. <<
111 <<
112 KUnit tests run during boot and outp <<
113 in TAP format (https://testanything. <<
114 running KUnit test harness and are n <<
115 build. <<
116 <<
117 For more information on KUnit and un <<
118 to the KUnit documentation in Docume <<
119 <<
120 If unsure, say N. <<
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