Commit cec32b00 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: add missing doc for fault injection sysfs 



We supported configuring fault injection parameter via sysfs w/
below commits, however, we forgot to add doc entry, fix it.

commit 08796897 ("f2fs: add fault injection to sysfs")
/sys/fs/f2fs/fault_injection/fault_*

commit 1ecc0c5c ("f2fs: support configuring fault injection per superblock")
/sys/fs/f2fs/<device>/fault_*

Cc: Sheng Yong <shengyong@oppo.com>
Signed-off-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 5eaac835

Documentation/ABI/testing/sysfs-fs-f2fs

+39 −0
Original line number Diff line number Diff line
@@ -669,3 +669,42 @@ Contact: "Ping Xiong" <xiongping1@xiaomi.com> 
Description:	When DATA SEPARATION is on, it controls the age threshold to indicate

		the data blocks as warm. By default it was initialized as 2621440 blocks

		(equals to 10GB).



What:		/sys/fs/f2fs/<disk>/fault_rate

Date:		May 2016

Contact:	"Sheng Yong" <shengyong@oppo.com>

Contact:	"Chao Yu" <chao@kernel.org>

Description:	Enable fault injection in all supported types with

		specified injection rate.



What:		/sys/fs/f2fs/<disk>/fault_type

Date:		May 2016

Contact:	"Sheng Yong" <shengyong@oppo.com>

Contact:	"Chao Yu" <chao@kernel.org>

Description:	Support configuring fault injection type, should be

		enabled with fault_injection option, fault type value

		is shown below, it supports single or combined type.



		===================      ===========

		Type_Name                Type_Value

		===================      ===========

		FAULT_KMALLOC            0x000000001

		FAULT_KVMALLOC           0x000000002

		FAULT_PAGE_ALLOC         0x000000004

		FAULT_PAGE_GET           0x000000008

		FAULT_ALLOC_BIO          0x000000010 (obsolete)

		FAULT_ALLOC_NID          0x000000020

		FAULT_ORPHAN             0x000000040

		FAULT_BLOCK              0x000000080

		FAULT_DIR_DEPTH          0x000000100

		FAULT_EVICT_INODE        0x000000200

		FAULT_TRUNCATE           0x000000400

		FAULT_READ_IO            0x000000800

		FAULT_CHECKPOINT         0x000001000

		FAULT_DISCARD            0x000002000

		FAULT_WRITE_IO           0x000004000

		FAULT_SLAB_ALLOC         0x000008000

		FAULT_DQUOT_INIT         0x000010000

		FAULT_LOCK_OP            0x000020000

		FAULT_BLKADDR            0x000040000

		===================      ===========