mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 08:15:17 +07:00
ede7a09fc8
The commit 643fa9612b ("fscrypt: remove filesystem specific
build config option") removed modular support for fs/crypto. This
causes the Crypto API to be built-in whenever fscrypt is enabled.
This makes it very difficult for me to test modular builds of
the Crypto API without disabling fscrypt which is a pain.
As fscrypt is still evolving and it's developing new ties with the
fs layer, it's hard to build it as a module for now.
However, the actual algorithms are not required until a filesystem
is mounted. Therefore we can allow them to be built as modules.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/r/20191227024700.7vrzuux32uyfdgum@gondor.apana.org.au
Signed-off-by: Eric Biggers <ebiggers@google.com>
102 lines
3.3 KiB
Plaintext
102 lines
3.3 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
|
|
config UBIFS_FS
|
|
tristate "UBIFS file system support"
|
|
select CRC16
|
|
select CRC32
|
|
select CRYPTO if UBIFS_FS_ADVANCED_COMPR
|
|
select CRYPTO if UBIFS_FS_LZO
|
|
select CRYPTO if UBIFS_FS_ZLIB
|
|
select CRYPTO if UBIFS_FS_ZSTD
|
|
select CRYPTO_LZO if UBIFS_FS_LZO
|
|
select CRYPTO_DEFLATE if UBIFS_FS_ZLIB
|
|
select CRYPTO_ZSTD if UBIFS_FS_ZSTD
|
|
select CRYPTO_HASH_INFO
|
|
select UBIFS_FS_XATTR if FS_ENCRYPTION
|
|
select FS_ENCRYPTION_ALGS if FS_ENCRYPTION
|
|
depends on MTD_UBI
|
|
help
|
|
UBIFS is a file system for flash devices which works on top of UBI.
|
|
|
|
if UBIFS_FS
|
|
|
|
config UBIFS_FS_ADVANCED_COMPR
|
|
bool "Advanced compression options"
|
|
help
|
|
This option allows to explicitly choose which compressions, if any,
|
|
are enabled in UBIFS. Removing compressors means inability to read
|
|
existing file systems.
|
|
|
|
If unsure, say 'N'.
|
|
|
|
config UBIFS_FS_LZO
|
|
bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR
|
|
default y
|
|
help
|
|
LZO compressor is generally faster than zlib but compresses worse.
|
|
Say 'Y' if unsure.
|
|
|
|
config UBIFS_FS_ZLIB
|
|
bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR
|
|
default y
|
|
help
|
|
Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
|
|
|
|
config UBIFS_FS_ZSTD
|
|
bool "ZSTD compression support" if UBIFS_FS_ADVANCED_COMPR
|
|
depends on UBIFS_FS
|
|
default y
|
|
help
|
|
ZSTD compresses is a big win in speed over Zlib and
|
|
in compression ratio over LZO. Say 'Y' if unsure.
|
|
|
|
config UBIFS_ATIME_SUPPORT
|
|
bool "Access time support"
|
|
default n
|
|
help
|
|
Originally UBIFS did not support atime, because it looked like a bad idea due
|
|
increased flash wear. This option adds atime support and it is disabled by default
|
|
to preserve the old behavior. If you enable this option, UBIFS starts updating atime,
|
|
which means that file-system read operations will cause writes (inode atime
|
|
updates). This may affect file-system performance and increase flash device wear,
|
|
so be careful. How often atime is updated depends on the selected strategy:
|
|
strictatime is the "heavy", relatime is "lighter", etc.
|
|
|
|
If unsure, say 'N'
|
|
|
|
config UBIFS_FS_XATTR
|
|
bool "UBIFS XATTR support"
|
|
default y
|
|
help
|
|
Saying Y here includes support for extended attributes (xattrs).
|
|
Xattrs are name:value pairs associated with inodes by
|
|
the kernel or by users (see the attr(5) manual page).
|
|
|
|
If unsure, say Y.
|
|
|
|
config UBIFS_FS_SECURITY
|
|
bool "UBIFS Security Labels"
|
|
depends on UBIFS_FS_XATTR
|
|
default y
|
|
help
|
|
Security labels provide an access control facility to support Linux
|
|
Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
|
|
Linux. This option enables an extended attribute handler for file
|
|
security labels in the ubifs filesystem, so that it requires enabling
|
|
the extended attribute support in advance.
|
|
|
|
If you are not using a security module, say N.
|
|
|
|
config UBIFS_FS_AUTHENTICATION
|
|
bool "UBIFS authentication support"
|
|
select KEYS
|
|
select CRYPTO_HMAC
|
|
select SYSTEM_DATA_VERIFICATION
|
|
help
|
|
Enable authentication support for UBIFS. This feature offers protection
|
|
against offline changes for both data and metadata of the filesystem.
|
|
If you say yes here you should also select a hashing algorithm such as
|
|
sha256, these are not selected automatically since there are many
|
|
different options.
|
|
|
|
endif # UBIFS_FS
|