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119 lines
4.0 KiB
119 lines
4.0 KiB
# SPDX-License-Identifier: GPL-2.0-only |
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# Ext3 configs are here for backward compatibility with old configs which may |
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# have EXT3_FS set but not EXT4_FS set and thus would result in non-bootable |
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# kernels after the removal of ext3 driver. |
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config EXT3_FS |
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tristate "The Extended 3 (ext3) filesystem" |
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select EXT4_FS |
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help |
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This config option is here only for backward compatibility. ext3 |
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filesystem is now handled by the ext4 driver. |
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config EXT3_FS_POSIX_ACL |
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bool "Ext3 POSIX Access Control Lists" |
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depends on EXT3_FS |
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select EXT4_FS_POSIX_ACL |
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select FS_POSIX_ACL |
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help |
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This config option is here only for backward compatibility. ext3 |
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filesystem is now handled by the ext4 driver. |
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config EXT3_FS_SECURITY |
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bool "Ext3 Security Labels" |
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depends on EXT3_FS |
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select EXT4_FS_SECURITY |
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help |
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This config option is here only for backward compatibility. ext3 |
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filesystem is now handled by the ext4 driver. |
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config EXT4_FS |
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tristate "The Extended 4 (ext4) filesystem" |
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select JBD2 |
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select CRC16 |
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select CRYPTO |
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select CRYPTO_CRC32C |
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select FS_IOMAP |
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select FS_ENCRYPTION_ALGS if FS_ENCRYPTION |
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help |
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This is the next generation of the ext3 filesystem. |
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Unlike the change from ext2 filesystem to ext3 filesystem, |
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the on-disk format of ext4 is not forwards compatible with |
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ext3; it is based on extent maps and it supports 48-bit |
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physical block numbers. The ext4 filesystem also supports delayed |
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allocation, persistent preallocation, high resolution time stamps, |
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and a number of other features to improve performance and speed |
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up fsck time. For more information, please see the web pages at |
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http://ext4.wiki.kernel.org. |
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The ext4 filesystem supports mounting an ext3 filesystem; while there |
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are some performance gains from the delayed allocation and inode |
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table readahead, the best performance gains require enabling ext4 |
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features in the filesystem using tune2fs, or formatting a new |
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filesystem as an ext4 filesystem initially. Without explicit enabling |
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of ext4 features, the on disk filesystem format stays fully backward |
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compatible. |
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To compile this file system support as a module, choose M here. The |
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module will be called ext4. |
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If unsure, say N. |
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config EXT4_USE_FOR_EXT2 |
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bool "Use ext4 for ext2 file systems" |
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depends on EXT4_FS |
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depends on EXT2_FS=n |
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default y |
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help |
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Allow the ext4 file system driver code to be used for ext2 |
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file system mounts. This allows users to reduce their |
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compiled kernel size by using one file system driver for |
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ext2, ext3, and ext4 file systems. |
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config EXT4_FS_POSIX_ACL |
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bool "Ext4 POSIX Access Control Lists" |
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depends on EXT4_FS |
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select FS_POSIX_ACL |
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help |
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POSIX Access Control Lists (ACLs) support permissions for users and |
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groups beyond the owner/group/world scheme. |
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If you don't know what Access Control Lists are, say N |
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config EXT4_FS_SECURITY |
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bool "Ext4 Security Labels" |
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depends on EXT4_FS |
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help |
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Security labels support alternative access control models |
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implemented by security modules like SELinux. This option |
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enables an extended attribute handler for file security |
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labels in the ext4 filesystem. |
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If you are not using a security module that requires using |
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extended attributes for file security labels, say N. |
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config EXT4_DEBUG |
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bool "Ext4 debugging support" |
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depends on EXT4_FS |
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help |
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Enables run-time debugging support for the ext4 filesystem. |
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If you select Y here, then you will be able to turn on debugging |
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using dynamic debug control for mb_debug() / ext_debug() msgs. |
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config EXT4_KUNIT_TESTS |
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tristate "KUnit tests for ext4" if !KUNIT_ALL_TESTS |
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depends on EXT4_FS && KUNIT |
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default KUNIT_ALL_TESTS |
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help |
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This builds the ext4 KUnit tests. |
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KUnit tests run during boot and output the results to the debug log |
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in TAP format (https://testanything.org/). Only useful for kernel devs |
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running KUnit test harness and are not for inclusion into a production |
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build. |
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For more information on KUnit and unit tests in general please refer |
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to the KUnit documentation in Documentation/dev-tools/kunit/. |
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If unsure, say N.
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