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Subject[PATCH v2 22/22] staging: erofs: update Kconfig
Date
Keep in line with erofs-outofstaging patchset:
- turn on CONFIG_EROFS_FS_ZIP by default;
- turn on CONFIG_EROFS_FS_SECURITY by default suggested by David;
- update Kconfig description.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
---
drivers/staging/erofs/Kconfig | 54 ++++++++++++++++++-----------------
1 file changed, 28 insertions(+), 26 deletions(-)

diff --git a/drivers/staging/erofs/Kconfig b/drivers/staging/erofs/Kconfig
index 1a8e48943e50..16316d1adca3 100644
--- a/drivers/staging/erofs/Kconfig
+++ b/drivers/staging/erofs/Kconfig
@@ -4,16 +4,16 @@ config EROFS_FS
tristate "EROFS filesystem support"
depends on BLOCK
help
- EROFS(Enhanced Read-Only File System) is a lightweight
+ 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, eg. firmwares in
- mobile phone or LIVECDs.
+ high-performance read-only requirements, e.g. Android OS
+ for mobile phones and LIVECDs.

- It also provides VLE compression support, focusing on
- random read improvements, keeping relatively lower
- compression ratios, which is useful for high-performance
- devices with limited memory and ROM space.
+ 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.

@@ -21,11 +21,19 @@ config EROFS_FS_DEBUG
bool "EROFS debugging feature"
depends on EROFS_FS
help
- Print EROFS debugging messages and enable more BUG_ONs
- which check the filesystem consistency aggressively.
+ 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_FAULT_INJECTION
+ bool "EROFS fault injection facility"
+ depends on EROFS_FS
+ help
+ Test EROFS to inject faults such as ENOMEM, EIO, and so on.
+ If unsure, say N.
+
config EROFS_FS_XATTR
bool "EROFS extended attributes"
depends on EROFS_FS
@@ -54,6 +62,7 @@ config EROFS_FS_POSIX_ACL
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
@@ -63,22 +72,15 @@ config EROFS_FS_SECURITY

If you are not using a security module, say N.

-config EROFS_FAULT_INJECTION
- bool "EROFS fault injection facility"
- depends on EROFS_FS
- help
- Test EROFS to inject faults such as ENOMEM, EIO, and so on.
- If unsure, say N.
-
config EROFS_FS_ZIP
- bool "EROFS Data Compresssion Support"
+ bool "EROFS Data Compression Support"
depends on EROFS_FS
select LZ4_DECOMPRESS
+ default y
help
- Currently we support LZ4 VLE Compression only.
- Play at your own risk.
+ Enable fixed-sized output compression for EROFS.

- If you don't want to use compression feature, say N.
+ If you don't want to enable compression feature, say N.

config EROFS_FS_CLUSTER_PAGE_LIMIT
int "EROFS Cluster Pages Hard Limit"
@@ -86,11 +88,11 @@ config EROFS_FS_CLUSTER_PAGE_LIMIT
range 1 256
default "1"
help
- Indicates VLE compressed pages hard limit of a
- compressed cluster.
+ Indicates maximum # of pages of a compressed
+ physical cluster.

- For example, if files of a image are compressed
- into 8k-unit, the hard limit should not be less
- than 2. Otherwise, the image cannot be mounted
- correctly on this kernel.
+ 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.

--
2.17.1
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