mirror of https://gitee.com/openkylin/linux.git
92 lines
2.7 KiB
Plaintext
92 lines
2.7 KiB
Plaintext
|
# SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
|
||
|
|
config EROFS_FS
|
||
|
|
tristate "EROFS filesystem support"
|
||
|
|
depends on BLOCK
|
||
|
|
help
|
||
|
|
EROFS (Enhanced Read-Only File System) is a lightweight
|
||
|
|
read-only file system with modern designs (eg. page-sized
|
||
|
|
blocks, inline xattrs/data, etc.) for scenarios which need
|
||
|
|
high-performance read-only requirements, e.g. Android OS
|
||
|
|
for mobile phones and LIVECDs.
|
||
|
|
|
||
|
|
It also provides fixed-sized output compression support,
|
||
|
|
which improves storage density, keeps relatively higher
|
||
|
|
compression ratios, which is more useful to achieve high
|
||
|
|
performance for embedded devices with limited memory.
|
||
|
|
|
||
|
|
If unsure, say N.
|
||
|
|
|
||
|
|
config EROFS_FS_DEBUG
|
||
|
|
bool "EROFS debugging feature"
|
||
|
|
depends on EROFS_FS
|
||
|
|
help
|
||
|
|
Print debugging messages and enable more BUG_ONs which check
|
||
|
|
filesystem consistency and find potential issues aggressively,
|
||
|
|
which can be used for Android eng build, for example.
|
||
|
|
|
||
|
|
For daily use, say N.
|
||
|
|
|
||
|
|
config EROFS_FS_XATTR
|
||
|
|
bool "EROFS extended attributes"
|
||
|
|
depends on EROFS_FS
|
||
|
|
default y
|
||
|
|
help
|
||
|
|
Extended attributes are name:value pairs associated with inodes by
|
||
|
|
the kernel or by users (see the attr(5) manual page, or visit
|
||
|
|
<http://acl.bestbits.at/> for details).
|
||
|
|
|
||
|
|
If unsure, say N.
|
||
|
|
|
||
|
|
config EROFS_FS_POSIX_ACL
|
||
|
|
bool "EROFS Access Control Lists"
|
||
|
|
depends on EROFS_FS_XATTR
|
||
|
|
select FS_POSIX_ACL
|
||
|
|
default y
|
||
|
|
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 EROFS_FS_SECURITY
|
||
|
|
bool "EROFS Security Labels"
|
||
|
|
depends on EROFS_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 erofs filesystem, so that it requires enabling
|
||
|
|
the extended attribute support in advance.
|
||
|
|
|
||
|
|
If you are not using a security module, say N.
|
||
|
|
|
||
|
|
config EROFS_FS_ZIP
|
||
|
|
bool "EROFS Data Compression Support"
|
||
|
|
depends on EROFS_FS
|
||
|
|
select LZ4_DECOMPRESS
|
||
|
|
default y
|
||
|
|
help
|
||
|
|
Enable fixed-sized output compression for EROFS.
|
||
|
|
|
||
|
|
If you don't want to enable compression feature, say N.
|
||
|
|
|
||
|
|
config EROFS_FS_CLUSTER_PAGE_LIMIT
|
||
|
|
int "EROFS Cluster Pages Hard Limit"
|
||
|
|
depends on EROFS_FS_ZIP
|
||
|
|
range 1 256
|
||
|
|
default "1"
|
||
|
|
help
|
||
|
|
Indicates maximum # of pages of a compressed
|
||
|
|
physical cluster.
|
||
|
|
|
||
|
|
For example, if files in a image were compressed
|
||
|
|
into 8k-unit, hard limit should not be configured
|
||
|
|
less than 2. Otherwise, the image will be refused
|
||
|
|
to mount on this kernel.
|
||
|
|
|