Commit 18792e64 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: support fault injection for f2fs_is_valid_blkaddr() 



This patch supports to inject fault into f2fs_is_valid_blkaddr() to
simulate accessing inconsistent data/meta block addressses from caller.

Usage:
a) echo 262144 > /sys/fs/f2fs/<dev>/inject_type or
b) mount -o fault_type=262144 <dev> <mountpoint>

Signed-off-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 91586ce0

Documentation/filesystems/f2fs.rst

+1 −0
Original line number Diff line number Diff line
@@ -199,6 +199,7 @@ fault_type=%d Support configuring fault injection type, should be 
			 FAULT_SLAB_ALLOC	  0x000008000

			 FAULT_DQUOT_INIT	  0x000010000

			 FAULT_LOCK_OP		  0x000020000

			 FAULT_BLKADDR		  0x000040000

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

mode=%s			 Control block allocation mode which supports "adaptive"

			 and "lfs". In "lfs" mode, there should be no random

fs/f2fs/checkpoint.c

+5 −0
Original line number Diff line number Diff line
@@ -171,6 +171,11 @@ static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr, 
bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,

					block_t blkaddr, int type)

{

	if (time_to_inject(sbi, FAULT_BLKADDR)) {

		f2fs_show_injection_info(sbi, FAULT_BLKADDR);

		return false;

	}



	switch (type) {

	case META_NAT:

		break;

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ enum { 
	FAULT_SLAB_ALLOC,

	FAULT_DQUOT_INIT,

	FAULT_LOCK_OP,

	FAULT_BLKADDR,

	FAULT_MAX,

};

fs/f2fs/super.c

+1 −0
Original line number Diff line number Diff line
@@ -61,6 +61,7 @@ const char *f2fs_fault_name[FAULT_MAX] = { 
	[FAULT_SLAB_ALLOC]	= "slab alloc",

	[FAULT_DQUOT_INIT]	= "dquot initialize",

	[FAULT_LOCK_OP]		= "lock_op",

	[FAULT_BLKADDR]		= "invalid blkaddr",

};



void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,