mirror of
https://github.com/torvalds/linux.git
synced 2024-11-12 07:01:57 +00:00
71dea01ea2
On arm64 this is apparently needed for CTS mode to function correctly. Otherwise attempts to use CTS return ENOENT. Change-Id: I732ea9a5157acc76de5b89edec195d0365f4ca63 Signed-off-by: Theodore Ts'o <tytso@mit.edu>
99 lines
3.1 KiB
Plaintext
99 lines
3.1 KiB
Plaintext
config EXT4_FS
|
|
tristate "The Extended 4 (ext4) filesystem"
|
|
select JBD2
|
|
select CRC16
|
|
select CRYPTO
|
|
select CRYPTO_CRC32C
|
|
help
|
|
This is the next generation of the ext3 filesystem.
|
|
|
|
Unlike the change from ext2 filesystem to ext3 filesystem,
|
|
the on-disk format of ext4 is not forwards compatible with
|
|
ext3; it is based on extent maps and it supports 48-bit
|
|
physical block numbers. The ext4 filesystem also supports delayed
|
|
allocation, persistent preallocation, high resolution time stamps,
|
|
and a number of other features to improve performance and speed
|
|
up fsck time. For more information, please see the web pages at
|
|
http://ext4.wiki.kernel.org.
|
|
|
|
The ext4 filesystem will support mounting an ext3
|
|
filesystem; while there will be some performance gains from
|
|
the delayed allocation and inode table readahead, the best
|
|
performance gains will require enabling ext4 features in the
|
|
filesystem, or formatting a new filesystem as an ext4
|
|
filesystem initially.
|
|
|
|
To compile this file system support as a module, choose M here. The
|
|
module will be called ext4.
|
|
|
|
If unsure, say N.
|
|
|
|
config EXT4_USE_FOR_EXT23
|
|
bool "Use ext4 for ext2/ext3 file systems"
|
|
depends on EXT4_FS
|
|
depends on EXT3_FS=n || EXT2_FS=n
|
|
default y
|
|
help
|
|
Allow the ext4 file system driver code to be used for ext2 or
|
|
ext3 file system mounts. This allows users to reduce their
|
|
compiled kernel size by using one file system driver for
|
|
ext2, ext3, and ext4 file systems.
|
|
|
|
config EXT4_FS_POSIX_ACL
|
|
bool "Ext4 POSIX Access Control Lists"
|
|
depends on EXT4_FS
|
|
select FS_POSIX_ACL
|
|
help
|
|
POSIX Access Control Lists (ACLs) support permissions for users and
|
|
groups beyond the owner/group/world scheme.
|
|
|
|
To learn more about Access Control Lists, visit the POSIX ACLs for
|
|
Linux website <http://acl.bestbits.at/>.
|
|
|
|
If you don't know what Access Control Lists are, say N
|
|
|
|
config EXT4_FS_SECURITY
|
|
bool "Ext4 Security Labels"
|
|
depends on EXT4_FS
|
|
help
|
|
Security labels support alternative access control models
|
|
implemented by security modules like SELinux. This option
|
|
enables an extended attribute handler for file security
|
|
labels in the ext4 filesystem.
|
|
|
|
If you are not using a security module that requires using
|
|
extended attributes for file security labels, say N.
|
|
|
|
config EXT4_ENCRYPTION
|
|
tristate "Ext4 Encryption"
|
|
depends on EXT4_FS
|
|
select CRYPTO_AES
|
|
select CRYPTO_CBC
|
|
select CRYPTO_ECB
|
|
select CRYPTO_XTS
|
|
select CRYPTO_CTS
|
|
select CRYPTO_CTR
|
|
select CRYPTO_SHA256
|
|
select KEYS
|
|
select ENCRYPTED_KEYS
|
|
help
|
|
Enable encryption of ext4 files and directories. This
|
|
feature is similar to ecryptfs, but it is more memory
|
|
efficient since it avoids caching the encrypted and
|
|
decrypted pages in the page cache.
|
|
|
|
config EXT4_FS_ENCRYPTION
|
|
bool
|
|
default y
|
|
depends on EXT4_ENCRYPTION
|
|
|
|
config EXT4_DEBUG
|
|
bool "EXT4 debugging support"
|
|
depends on EXT4_FS
|
|
help
|
|
Enables run-time debugging support for the ext4 filesystem.
|
|
|
|
If you select Y here, then you will be able to turn on debugging
|
|
with a command such as:
|
|
echo 1 > /sys/module/ext4/parameters/mballoc_debug
|