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1# SPDX-License-Identifier: GPL-2.0-only
2# Ext3 configs are here for backward compatibility with old configs which may
3# have EXT3_FS set but not EXT4_FS set and thus would result in non-bootable
4# kernels after the removal of ext3 driver.
5config EXT3_FS
6 tristate "The Extended 3 (ext3) filesystem"
7 select EXT4_FS
8 help
9 This config option is here only for backward compatibility. ext3
10 filesystem is now handled by the ext4 driver.
11
12config 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 backward compatibility. ext3
19 filesystem is now handled by the ext4 driver.
20
21config 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 backward compatibility. ext3
27 filesystem is now handled by the ext4 driver.
28
29config EXT4_FS
30 tristate "The Extended 4 (ext4) filesystem"
31 select JBD2
32 select CRC16
33 select CRYPTO
34 select CRYPTO_CRC32C
35 select FS_IOMAP
36 select FS_ENCRYPTION_ALGS if FS_ENCRYPTION
37 help
38 This is the next generation of the ext3 filesystem.
39
40 Unlike the change from ext2 filesystem to ext3 filesystem,
41 the on-disk format of ext4 is not forwards compatible with
42 ext3; it is based on extent maps and it supports 48-bit
43 physical block numbers. The ext4 filesystem also supports delayed
44 allocation, persistent preallocation, high resolution time stamps,
45 and a number of other features to improve performance and speed
46 up fsck time. For more information, please see the web pages at
47 http://ext4.wiki.kernel.org.
48
49 The ext4 filesystem supports mounting an ext3 filesystem; while there
50 are some performance gains from the delayed allocation and inode
51 table readahead, the best performance gains require enabling ext4
52 features in the filesystem using tune2fs, or formatting a new
53 filesystem as an ext4 filesystem initially. Without explicit enabling
54 of ext4 features, the on disk filesystem format stays fully backward
55 compatible.
56
57 To compile this file system support as a module, choose M here. The
58 module will be called ext4.
59
60 If unsure, say N.
61
62config EXT4_USE_FOR_EXT2
63 bool "Use ext4 for ext2 file systems"
64 depends on EXT4_FS
65 depends on EXT2_FS=n
66 default y
67 help
68 Allow the ext4 file system driver code to be used for ext2
69 file system mounts. This allows users to reduce their
70 compiled kernel size by using one file system driver for
71 ext2, ext3, and ext4 file systems.
72
73config EXT4_FS_POSIX_ACL
74 bool "Ext4 POSIX Access Control Lists"
75 depends on EXT4_FS
76 select FS_POSIX_ACL
77 help
78 POSIX Access Control Lists (ACLs) support permissions for users and
79 groups beyond the owner/group/world scheme.
80
81 If you don't know what Access Control Lists are, say N
82
83config EXT4_FS_SECURITY
84 bool "Ext4 Security Labels"
85 depends on EXT4_FS
86 help
87 Security labels support alternative access control models
88 implemented by security modules like SELinux. This option
89 enables an extended attribute handler for file security
90 labels in the ext4 filesystem.
91
92 If you are not using a security module that requires using
93 extended attributes for file security labels, say N.
94
95config EXT4_DEBUG
96 bool "Ext4 debugging support"
97 depends on EXT4_FS
98 help
99 Enables run-time debugging support for the ext4 filesystem.
100
101 If you select Y here, then you will be able to turn on debugging
102 using dynamic debug control for mb_debug() / ext_debug() msgs.
103
104config EXT4_KUNIT_TESTS
105 tristate "KUnit tests for ext4" if !KUNIT_ALL_TESTS
106 depends on EXT4_FS && KUNIT
107 default KUNIT_ALL_TESTS
108 help
109 This builds the ext4 KUnit tests.
110
111 KUnit tests run during boot and output the results to the debug log
112 in TAP format (https://testanything.org/). Only useful for kernel devs
113 running KUnit test harness and are not for inclusion into a production
114 build.
115
116 For more information on KUnit and unit tests in general please refer
117 to the KUnit documentation in Documentation/dev-tools/kunit/.
118
119 If unsure, say N.
1# SPDX-License-Identifier: GPL-2.0-only
2# Ext3 configs are here for backward compatibility with old configs which may
3# have EXT3_FS set but not EXT4_FS set and thus would result in non-bootable
4# kernels after the removal of ext3 driver.
5config EXT3_FS
6 tristate "The Extended 3 (ext3) filesystem"
7 select EXT4_FS
8 help
9 This config option is here only for backward compatibility. ext3
10 filesystem is now handled by the ext4 driver.
11
12config 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 backward compatibility. ext3
19 filesystem is now handled by the ext4 driver.
20
21config 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 backward compatibility. ext3
27 filesystem is now handled by the ext4 driver.
28
29config EXT4_FS
30 tristate "The Extended 4 (ext4) filesystem"
31 select BUFFER_HEAD
32 select JBD2
33 select CRC16
34 select CRYPTO
35 select CRYPTO_CRC32C
36 select FS_IOMAP
37 select FS_ENCRYPTION_ALGS if FS_ENCRYPTION
38 help
39 This is the next generation of the ext3 filesystem.
40
41 Unlike the change from ext2 filesystem to ext3 filesystem,
42 the on-disk format of ext4 is not forwards compatible with
43 ext3; it is based on extent maps and it supports 48-bit
44 physical block numbers. The ext4 filesystem also supports delayed
45 allocation, persistent preallocation, high resolution time stamps,
46 and a number of other features to improve performance and speed
47 up fsck time. For more information, please see the web pages at
48 http://ext4.wiki.kernel.org.
49
50 The ext4 filesystem supports mounting an ext3 filesystem; while there
51 are some performance gains from the delayed allocation and inode
52 table readahead, the best performance gains require enabling ext4
53 features in the filesystem using tune2fs, or formatting a new
54 filesystem as an ext4 filesystem initially. Without explicit enabling
55 of ext4 features, the on disk filesystem format stays fully backward
56 compatible.
57
58 To compile this file system support as a module, choose M here. The
59 module will be called ext4.
60
61 If unsure, say N.
62
63config EXT4_USE_FOR_EXT2
64 bool "Use ext4 for ext2 file systems"
65 depends on EXT4_FS
66 depends on EXT2_FS=n
67 default y
68 help
69 Allow the ext4 file system driver code to be used for ext2
70 file system mounts. This allows users to reduce their
71 compiled kernel size by using one file system driver for
72 ext2, ext3, and ext4 file systems.
73
74config EXT4_FS_POSIX_ACL
75 bool "Ext4 POSIX Access Control Lists"
76 depends on EXT4_FS
77 select FS_POSIX_ACL
78 help
79 POSIX Access Control Lists (ACLs) support permissions for users and
80 groups beyond the owner/group/world scheme.
81
82 If you don't know what Access Control Lists are, say N
83
84config EXT4_FS_SECURITY
85 bool "Ext4 Security Labels"
86 depends on EXT4_FS
87 help
88 Security labels support alternative access control models
89 implemented by security modules like SELinux. This option
90 enables an extended attribute handler for file security
91 labels in the ext4 filesystem.
92
93 If you are not using a security module that requires using
94 extended attributes for file security labels, say N.
95
96config EXT4_DEBUG
97 bool "Ext4 debugging support"
98 depends on EXT4_FS
99 help
100 Enables run-time debugging support for the ext4 filesystem.
101
102 If you select Y here, then you will be able to turn on debugging
103 using dynamic debug control for mb_debug() / ext_debug() msgs.
104
105config EXT4_KUNIT_TESTS
106 tristate "KUnit tests for ext4" if !KUNIT_ALL_TESTS
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 output the results to the debug log
113 in TAP format (https://testanything.org/). Only useful for kernel devs
114 running KUnit test harness and are not for inclusion into a production
115 build.
116
117 For more information on KUnit and unit tests in general please refer
118 to the KUnit documentation in Documentation/dev-tools/kunit/.
119
120 If unsure, say N.