Commit 3e020389 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
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f2fs: support fault injection to f2fs_trylock_op() 



f2fs: support fault injection for f2fs_trylock_op()

This patch supports to inject fault into f2fs_trylock_op().

Usage:
a) echo 65536 > /sys/fs/f2fs/<dev>/inject_type or
b) mount -o fault_type=65536 <dev> <mountpoint>

Signed-off-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent dd9d4a3a

Documentation/filesystems/f2fs.rst

+1 −0
Original line number Diff line number Diff line
@@ -198,6 +198,7 @@ fault_type=%d Support configuring fault injection type, should be 
			 FAULT_WRITE_IO		  0x000004000

			 FAULT_SLAB_ALLOC	  0x000008000

			 FAULT_DQUOT_INIT	  0x000010000

			 FAULT_LOCK_OP		  0x000020000

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

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

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

fs/f2fs/f2fs.h

+5 −0
Original line number Diff line number Diff line
@@ -56,6 +56,7 @@ enum { 
	FAULT_WRITE_IO,

	FAULT_SLAB_ALLOC,

	FAULT_DQUOT_INIT,

	FAULT_LOCK_OP,

	FAULT_MAX,

};
@@ -2095,6 +2096,10 @@ static inline void f2fs_lock_op(struct f2fs_sb_info *sbi) 


static inline int f2fs_trylock_op(struct f2fs_sb_info *sbi)

{

	if (time_to_inject(sbi, FAULT_LOCK_OP)) {

		f2fs_show_injection_info(sbi, FAULT_LOCK_OP);

		return 0;

	}

	return down_read_trylock(&sbi->cp_rwsem);

}

fs/f2fs/super.c

+1 −0
Original line number Diff line number Diff line
@@ -59,6 +59,7 @@ const char *f2fs_fault_name[FAULT_MAX] = { 
	[FAULT_WRITE_IO]	= "write IO error",

	[FAULT_SLAB_ALLOC]	= "slab alloc",

	[FAULT_DQUOT_INIT]	= "dquot initialize",

	[FAULT_LOCK_OP]		= "lock_op",

};



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